Title of Invention

BENZOFURAN DERIVATIVES

Abstract

The present invention provides a benzofuran derivative 5 of the formula [1]: wherein x is a group of the formula: -N= or -CH=; Y is an optionally substituted amino group, an optionally substituted cycloalkyl group or an optionally substituted :1.0 saturated heterocyclic group; A is a single bond, a carbon qhain optionally having a double bond within or at the end(s) of the chain, or an oxygen atom; R<sup>1</sup> is a hydrogen atom or a halogen atom; Ring B is an optionally substituted benzene ring; and R<sup>3</sup> is a hydrogen atom, or a ~ 15 pharmaceutically acceptable salt thereof, which is useful , as a medicament, especially as an activated blood coagulation factor X inhibitor.

Full Text

DESCRIPTION BENZOFURAN DERIVATIVES TECHNICAL FIELD The present invention relates to a benzofuran derivative useful as a medicament, particularly as an inhibitor of activated blood coagulation factor X, or pharmaceutically acceptable salt thereof. BACKGROUND ART In late years, as the westernization of living habit and the aging of populations, thromboembolic diseases such as myocardial infarction, cerebral infarction and peripheral arterial thrombosis increase year by year, and social importance of treatment thereof has risen more and more. Among therapies of thromboembolic diseases, anticoagulant therapy, as well as fibrinolytic therapy and antiplatelet therapy, takes part in medical therapy for treatment and prevention of thrombosis (Sogorinsho 41: 2141-2145, 1989). In particular, the safety sustainable to chronic administration and the reliable and appropriate expression of anticoagulant activity are essential in the prevention of thrombosis. A coumarin derivative, especially warfarin potassium, has often been used all over the world as only anticoagulant available orally. However, owing to the characteristics arisen from the mechanism of action, it requires long time until the drug efficacy manifests and has very long half-life in blood, although the concentration range for expression of drug efficacy is relatively narrow, and also shows significant differences in the effective dose among individuals. For these reasons, the anticoagulant ability can hardly be controlled (Journal of Clinical Pharmacology, 1992, vol. 32, pp. 196-209; MEW ENGLAND JOURNAL OF MEDICINE, 1991, vol. 324, no. 26, pp. 1865-1875). In addition, there may be adverse drug reactions such as risk of bleeding, nausea, vomiting, diarrhea, depilation, etc., and therefore the clinical application thereof is very difficult and the development of anticoagulants that are useful and easy to handle has been demanded. In addition, enhancement of blood clotting ability is one of significant causative factors of unstable angina, cerebral infarction, cerebral embolism, myocardial infarction, pulmonary infarction, pulmonary embolism, Buerger's disease, deep vein thrombosis, disseminated intravascular coagulation, thrombogenesis after artificial heart valve displacement, reocclusion after blood circulation reconstruction and thrombogenesis during extracorporeal circulation, etc. Therefore, a distinguished anticoagulant that shows good dose response and lower risk of hemorrhage with few side-effects, and can exert sufficient effects upon oral administration has been desired (Thrombosis Research, 1992, vol. 68, pp. 507-512). Thrombin participates not only in the conversion of fibrinogen to fibrin, which is the final stage of the coagulation cascade, but also deeply in the activation and aggregation of blood platelets (Matsuo, 0., "t-PA and Pro-UK", Gakusaikikaku, 1986, pp. 5-40), and an inhibitor thereof has long been the center of the research in anticoagulants as a target of development of new drugs. However, a thrombin inhibitor shows low bioavailability upon oral administration and also has drawbacks in regard to safety such as bleeding tendency as one of side effects (Biomedica Biochimica Acta, 1985, Vol. 44, p.1201-1210), and there have been no thrombin inhibitors marketed so far, which can be orally administered. The activated blood coagulation factor X is a key enzyme located' in the position of the common pathway of both extrinsic and intrinsic coagulation cascade reactions. The factor Xa is located upstream from thrombin in the coagulation cascade. Therefore, the inhibition of the factor Xa is possibly more effective and specific in the inhibition of coagulation system compared to the inhibition of thrombin (Thrombosis Research, 1980, Vol. 19, pp. 339-349) . Thus, among inhibitors of activated blood coagulation factor X, a substance, which inhibits blood coagulation factor Xa and shows distinguished enzyme selectivity and high bioavailability, is expected to undergo control of its anticoagulant activity for a long period of -time and can express superior therapeutic effect upon oral administration compared to the existing anticoagulants. Accordingly, the development of a novel inhibitor of activated blood coagulation factor X (FXa inhibitor) that can be administered orally has been earnestly demanded. Examples of known compounds having inhibitory effect on activated blood coagulation factor X include thiobenzamide compounds that are useful in prevention or treatment of thrombosis (W099/42439). The following benzcfuran compounds have also been known (Indian Journal of Hetero Cyclic Chemistry, 1994, Vol. 3, pp. 3247-3252), but said literature does not mention about the inhibitory effect of the compounds on activated blood coagulation factor X. which has an activity of suppressing the growth of activated lymphocytes and are useful as a drug for preventing or treating autoimmune diseases are also known (WO02/12189) . The WO02/12189 does not mention about the inhibitory effect on activated blood coagulation factor X either. In the pamphlet, compounds having a condensed ring of pyridine and furan to which ring an amide and a carbamoyl groups are di-substituted are disclosed; however, said compounds all have a benzene ring on the nitrogen atom of the carbamoyl group, said benzene ring being substituted by X and Y simultaneously. DISCLOSURE OF INVENTION The present invention provides a novel benzofuran derivative having excellent inhibitory effect on activated blood coagulation factor X, or a pharmaceutically acceptable salts thereof. The present inventors have intensively studied and have found that a benzofuran derivative of the formula below has excellent inhibitory effect on activated blood coagulation factor X and have accomplished the present invention. That is, the present invention is as follows: (i) A benzofuran derivative of the formula [1]: Y is an optionally substituted amino group, an optionally substituted cycloalkyl group or an optionally substituted saturated heterocyclic group; A is a single bond, a carbon chain optionally having a double bond within or at the end(s) of the chain, or an oxygen atom; R^ is a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkoxy group, a cyano group or an amino group optionally substituted by a lower alkyl group; Ring B of the formula: or a pharmaceurically acceptable salt thereof, (ii) The compound according to (i), wherein Ring B is a benzene ring optionally substituted by a group(s) selected independently from a halogen atom, an optionally substituted lower alkyl group, a hydroxy group, an optionally substituted lower alkoxy group, an oxy group substituted by an optionally substituted saturated heterocyclic group, a substituted carbonyl group, an optionally substituted amino group, a nitro group, a cyano group, a 4,5-dihydroxazolyl group or a group of the the 'optionally substituted cycloalkyl group" for Y is a cycloalkyl group optionally substituted by a group selected from an optionally substituted amino group, an optionally the "optionally substituted saturated heterocyclic group" for Y is a saturated heterocyclic group optionally substituted by a group selected from the followings: (1) a lower alkyl group, (2) a lower alkyl group substituted by a pyridyl group, (3) a piperidyl group substituted by a lower alkyl group, (4) a piperidyl group, (5) a piperidyl group substituted by a lower alkoxycarbonyl group, (6) an unsaturated heterocyclic group selected from a pyridyl group, a pyrimidinyl group, a 4,5-dihydroxazolyl group and a thiazolyl group, (7) a lower alkanoyl group, (8) a lower alkanoyl group substituted by a di-lower alkylamino group, (9) a carbonyl group substituted by a pyridyl group, (10) a lower alkylsulfonyl group, (11) a lower alkoxycarbonyl group, (12) a lower alkyl group substituted by a di-lower alkylamino group, and (13) an oxo group; the "optionally substituted amino group" for Y is an amino group optionally substituted by a group selected from the followings: (1) a piperidyl group substituted by a lower alkyl group, (2) a lower alkyl group, and (3) a lower alkoxycarbonyl group; the "optionally substituted amino group" as a substituent on the cycloalkyl group for Y is an amino group optionally substituted by a group selected from the followings: (1) a lower alkyl group, (2) a cycloalkyl group, (3) a hydroxy-lower alkyl group. (4) a 1,3-dioxanyl group substituted by a lower alkyl group, (5) a lower alkyl group substituted by an amino group optionally substituted by a group selected from (a) a lower alkyl group, (b) a lower alkanoyl group, (c) a lower alkanoyl group substituted by an amino group substituted by a lower alkyl group, and (d) a lower alkoxycarbonyl group, (6) a lower alkyl group substituted by a cyano group, (7) a lower alkyl group substituted by a lower alkoxycarbonyl group, (8) a lower alkyl group substituted by a carboxyl group, (9) a lower alkyl group substituted by a carbamoyl group optionally substituted by a lower alkyl group, (10) a lower alkyl group substituted by an aryl group, (11) a lower alkyl group substituted by a pyridyl group, (12) a lower alkoxycarbonyl group, (13) a lower alkanoyl group substituted by a di-lower alkyl amino group, (14) a lower alkanoyl group, (15) a pyrimidinyl group, (16) a lower alkanoyl group substituted by a morpholinyl group, (17) a lower alkylsulfonyl group, (18) a carbamoyl group substituted by a lower alkyl group, (19) a carbonyl group substituted by an aryl group, (20) a lower alkanoyl group substituted by a lower alkoxy group, (21) a lower alkanoyl group substituted by a lower alkanoyloxy group, (22) an aryl group substituted by a hydroxyl group, and that is optionally substituted by an oxo group; the "optionally substituted lower alkyl group" as a substituent on the cycloalkyl group for Y is a lower alkyl group optionally substituted by a group selected from the followings: (1) an oxopyrrolidinyl group, (2) an oxomorpholinyl group, and (3) an amino group optionally substituted by a group selected from (a) a lower alkyl group, (b) a lower alkoxycarbonyl group, and (c) a lower alkanoyl group; the "optionally substituted lower alkyl group" as a substituent for Ring B is a lower alkyl group optionally substituted by a group selected from the followings: (1) a lower alkoxycarbonyl group, (2) a carboxyl group, (3) a carbamoyl group optionally substituted by a group selected from (a) a lower alkyl group, (b) a lower alkoxy- lower alkyl group, (c) a lower alkyl group substituted by a hydroxyl group, and (d) a lower alkoxy group, (4) a carbonyl group substituted by a morpholinyl group, (5) a piperidylcarbonyl group substituted by a hydroxy-lower alkyl group, (6) a pyrrolidinylcarbonyl group substituted by a hydroxy-lower alkyl group, (7) a carbonyl group substituted by a hydroxyl group-substituted piperidyl group, and (8) a hydroxyl group; the "optionally substituted lower alkoxy group" as a substituent for Ring B is a lower alkoxy group optionally substituted by a group selected from the followings: (1) a carboxyl group, (2) a lower alkoxycarbonyl group, (3) a lower alkoxy group, (4) a hydroxyl group, (5) an aminooxy group optionally substituted by a lower alkoxycarbonyl group, (6) a lower alkoxy group substituted by a lower alkoxy group, (7) a carbonyl group substituted by a morpholinyl group, a piperidyl group or a pyrrolidinyl group, (8) a carbonyl group substituted by a hydroxypiperidyl group, (9) a piperidylcarbonyl group substituted by a hydroxy-lower alkyl group, (10) a pyrrolidinylcarbonyl group substituted by a hydroxy-lower alkyl group, (11) a carbonyl group substituted by a lower alkyl- piperazinyl group, (12) an amino group optionally substituted by (a) a lower alkyl group, (b) a lower alkoxycarbonyl group, and (c) a lower alkanoyl group, (13) a carbamoyl group optionally substituted by a group selected from (a) a lower alkyl group, (b) a lower alkoxy-lower alkyl group, (c) a lower alkyl group substituted by a hydroxyl group, and (d) a lower alkyl group substituted by a di-lower alkylamino group; and (14) a group of the formula: -0-NH-C(=NH)NH2; the "oxy group substituted by an optionally substituted saturated heterocyclic group" as a substituent for Ring B is an oxy group substituted by a heterocyclic group optionally substituted by an aryl group; the "substituted carbonyl group" as a substituent for Ring B is a carbonyl group substituted by a group selected from the followings: (1) a lower alkoxy group, (2) a hydroxyl group, (3) an amino group optionally substituted by (a) a lower alkyl group, (b) a lower alkoxy group, (c) a lower alkoxy-lower alkyl group, (d) a hydroxy-lower alkyl group, (e) a lower alkyl group substituted by an amino group optionally substituted by a lower alkyl group, (f) a lower alkyl group substituted by an aryl group, and (g) a lower alkyl group substituted by a pyridyl group, (4) a morpholinyl group, a pyrrolidinyl group, a piperidyl group or a thiomorpholinyl group, (5) a hydroxypiperidyl group, (6) a piperidyl group substituted by a hydroxy-lower alkyl group, (7) a pyrrolidinyl group substituted by a hydroxy-lower alkyl group, and (8) a lower alkyl-piperazinyl group; the "optionally substituted amino group" as a substituent for Ring B is an amiino group optionally substituted by a group selected from the followings: (1) a lower alkyl group, (2) a lower alkoxy-lower alkyl group, (3) a hydroxy-lower alkyl group, (4) a lower alkanoyl group, (5) a lower alkoxy-lower alkanoyl group, (6) a hydroxy-lower alkanoyl group, (7) a lower alkanoyl group substituted by a lower alkanoyloxy group, (8) a lower alkanoyl group substituted by an amino group optionally substituted by a group selected from (a) a lower alkyl group and (b) a lower alkanoyl group, (9) a lower alkoxycarbonyl group, (10) a lower alkoxycarbonyl group substituted by an aryl group, (11) a carbamoyl group substituted by a lower alkyl group, (12) a lower alkylsulfonyl group, and (13) a lower alkylsulfonyl group substituted by a morpholinyl group. (iv) The compound according to (iii), wherein B is an unsubstituted benzene ring; and Y is a saturated he-erocyclic group optionally substituted by a group selected from the followings: (1) a lower alkyl group. (2) a lower alkyl group substituted by a pyridyl group (3) a piperidyl group substituted by a lower alkyl group, (4) a piperidyl group, (5) a piperidyl group substituted by a lower alkoxycarbonyl group, (6) an unsaturated heterocyclic group selected from a pyridyl group, a pyrimidinyl group, a 4,5-dihydroxazolyl group and a thiazolyl group, (7) a lower alkanoyl group, (8) a lower alkanoyl group substituted by a di-lower alkylamino group, (9) a carbonyl group substituted by a pyridyl group, (10) a lower alkylsulfonyl group, (11) a lower alkoxycarbonyl group, (12) a lower alkyl group substituted by a di-lower alkylamino group, and (13) an oxo group. (v) The compound according to (iii), wherein B is an unsubstituted benzene ring; and Y is an amino group optionally substituted by a group selected from the followings: (1) a piperidyl group substituted by a lower alkyl group, (2) a lower alkyl group, and (3) a lower alkoxycarbonyl group. (vi) The compound according to (iii), wherein B is an unsubstituted benzene ring; and Y is a cycloalkyl group optionally substituted by the followings: A) an amino group optionally substituted by the followings: (1) a lower alkyl group, (2) a cycloalkyl group, (3) a hydroxy-lower alkyl group, (4) a 1,3-dioxanyl group substituted by a lower alkyl group, (5) a lower alkyl group substituted by an amino group optionally substituted by a group selected from (a) a lower alkyl group, (b) a lower alkanoyl group, (c) a lower alkanoyl group substituted by an amino group substituted by a lower alkyl group, and (d) a lower alkoxycarbonyl group, (6) a lower alkyl group substituted by a cyano group, (7) a lower alkyl group substituted by a lower alkoxycarbonyl group, (8) a lower alkyl group substituted by a carboxyl group, (9) a lower alkyl group substituted by a carbamoyl group optionally substituted by a lower alkyl group, (10) a lower alkyl group substituted by an aryl group, (11) a lower alkyl group substituted by a pyridyl group, (12) a lower alkoxycarbonyl group, (13) a lower alkanoyl group substituted by a di-lower alkyl amino group, (14) a lower alkanoyl group, (15) a pyrimidinyl group, (16) a lower alkanoyl group substituted by a morpholinyl group, (17) a lower alkylsulfonyl group, (18) a carbamoyl group substituted by a lower alkyl group, (19) a carbonyl group substituted by an aryl group, (20) a lower alkanoyl group substituted by a lower alkoxy group. (21) a lower alkanoyl group substituted by a lower alkanoyloxy group, (22) an aryl group substituted by a hydroxy group, and (23) a hydroxy-lower alkanoyl group; that is optionally substituted by an oxo group; or C) a lower alkyl group optionally substituted by a group selected from the followings: (1) an oxopyrrolidinyl group, (2) an oxomorpholinyl group, and (3) an amino group optionally substituted by (a) a lower alkyl group, (b) a lower alkoxycarbonyl group, and (c) a lower alkanoyl group. (vii) The compound according to (iii), wherein Ring B is a benzene ring substituted by a lower alkyl group optionally substituted by a group selected from the followings: (1) a lower alkoxycarbonyl group, (2) a carboxyl group, (3) a carbamoyl group optionally substituted by a group selected from (a) a lower alkyl group, (b) a lower alkoxy- lower alkyl group, (c) a lower alkyl group substituted by a hydroxyl group, and (d) a lower alkoxy group, (4) a carbonyl group substituted by a morpholinyl group, (5) a piperidylcarbonyl group substituted by a hydroxy- lower alkyl group. (6) a pyrrolidinylcarbonyl group substituted by a hydroxy-lower alkyl group, (7) a carbonyl group substituted by a hydroxyl group-substituted piperidyl group, and (8) a hydroxyl group; and Y is a saturated heterocyclic group optionally substituted by a group selected from the followings: (1) a lower alkyl group, (2) a lower alkyl group substituted by a pyridyl group (3) a piperidyl group substituted by a lower alkyl group, (4) a piperidyl group, (5) a piperidyl group substituted by a lower alkoxycarbonyl group, (6) an unsaturated heterocyclic group selected from a pyridyl group, a pyrimidinyl group, a 4,5-dihydroxaolyl group and a thiazolyl group, (7) a lower alkanoyl group, (8) a lower alkanoyl group substituted by a di-lower alkylamino group, (9) a carbonyl group substituted by a pyridyl group, (10) a lower alkylsulfonyl group, (11) a lower alkoxycarbonyl group, (12) a lower alkyl group substituted by a di-lower alkylamino group, and (13) an oxo group. (viii) The compound according to (iii), wherein Ring B is a benzene ring substituted by a lower alkyl group optionally substitu'ed by a group selected from the followings: (1) a lower alkoxycarbonyl group. (2) a carboxyl group, (3) a carbamoyl group optionally substituted by a group selected from (a) a lower alkyl group, (b) a lower alkoxy-lower alkyl group, (c) a lower alkyl group substituted by a hydroxyl group, and (d) a lower alkoxy group, (4) a carbonyl group substituted by a morpholinyl group, (5) a piperidylcarbonyl group substituted by a hydroxy-lower alkyl group, (6) a pyrrolidinylcarbonyl group substituted by a hydroxy-lower alkyl group, (7) a carbonyl group substituted by a hydroxyl group-substituted piperidyl group, and (8) a hydroxyl group; and Y is an amino group optionally substituted by a group selected from the followings: (1) a piperidyl group substituted by a lower alkyl group, (2) a lower alkyl group, and (3) a lower alkoxycarbonyl group. (ix) The compound according to (iii) , wherein Ring B is a benzene ring substituted by a lower alkyl group optionally substituted by a group selected from the followings: (1) a lower alkoxycarbonyl group, (2) a carboxyl group, (3) a carbamoyl group optionally substituted by a group selected from (a) a lower alkyl group, (b) a lower alkoxy-lower alkyl group, (c) a lower alkyl group substituted by a hydroxyl group, and (d) a lower alkoxy group, (4) a carbonyl group substituted by a morpholinyl group, (5) a piperidylcarbonyl group substituted by a hydroxy-lower alkyl group. (6) a pyrrolidinylcarbonyl group substituted by a hydroxy-lower alkyl group, (7) a carbonyl group substituted by a hydroxyl group-substituted piperidyl group, and (8) a hydroxyl group; and Y is a cycloalkyl group optionally substituted by the followings: A) an amino group optionally substituted by the followings: (1) a lower alkyl group, (2) a cycloalkyl group, (3) a hydroxy-lower alkyl group, (4) a 1,3-dioxanyl group substituted by a lower alkyl group, (5) a lower alkyl group substituted by an amino group optionally substituted by a group selected from (a) a lower alkyl group, (b) a lower alkanoyl group, (c) a lower alkanoyl group substituted by an amino group substituted by a lower alkyl group, and (d) a lower alkoxycarbonyl group, (6) a lower alkyl group substituted by a cyano group, (7) a lower alkyl group substituted by a lower alkoxycarbonyl group, (8) a lower alkyl group substituted by a carboxyl group, (9) a lower alkyl group substituted by a carbamoyl group optionally substituted by a lower alkyl group, (10) a lower alkyl group sufestituted by an aryl group, (11) a lower alkyl group substituted by a pyridyl group, (12) a lower alkoxycarbonyl group, (13) a lower alkanoyl group substituted by a di-lower alkyl amino group. (14) a lower alkanoyl group, (15) a pyrimidinyl group, (16) a lower alkanoyl group substituted by a morpholinyl group, (17) a lower alkylsulfonyl group, (18) a carbamoyl group substituted by a lower alkyl group, (19) a carbonyl group substituted by an aryl group, (20) a lower alkanoyl group substituted by a lower alkoxy group, (21) a lower alkanoyl group substituted by a lower alkanoyloxy group, (22) an aryl group substituted by a hydroxy group, and (23) a hydroxy-lower alkanoyl group; that is optionally substituted by an oxo group; or C) a lower alkyl group optionally substituted by a group selected from the followings: (1) an oxopyrrolidinyl group, (2) an oxomorpholinyl group, and (3) an amino group optionally substituted by (a) a lower alkyl group, (b) a lower alkoxycarbonyl group, and (c) a lower alkanoyl group. (x) The compound according to (iii), wherein Ring B is a benzene ring substituted by a lower alkoxy group optionally substituted by a group selected from the followings: (1) a carboxyl group. (2) a lower alkoxycarbonyl group, (3) a lower alkoxy group, (4) a hydroxyl group, (5) an aminooxy group optionally substituted by a lower alkoxycarbonyl group, (6) a lower alkoxy group substituted by a lower alkoxy group, (7) a carbonyl (^roup substituted by a morpholinyl group, a piperidyl group or a pyrrolidinyl group, (8) a carbonyl group substituted by a hydroxypiperidyl group, (9) a piperidylcarbonyl group substituted by a hydroxy-lower alkyl group, (10) a pyrrolidinylcarbonyl group substituted by a hydroxy-lower alkyl group, (11) a carbonyl group substituted by a lower alkyl-piperazinyl group, (12) an amino group optionally substituted by (a) a lower alkyl group, (b) a lower alkoxycarbonyl group, and (c) a lower alkanoyl group, (13) a carbamoyl group optionally substituted by a group selected from (a) a lower alkyl group, (b) a lower alkoxy-lower alkyl group, (c) a lower alkyl group substituted by a hydroxyl group, and (d) a lower alkyl group substituted by a di-lower alkylamino group; and (14) a group of the formula: -0-NH-C(=NH)NH2; and Y is a saturated heterocyclic group optionally substituted by a group selected from the followings: (1) a lower alkyl group, (2) a lower alkyl group substituted by a pyridyl group (3) a piperidyl group substituted by a lower alkyl group, (4) a piperidyl group, (5) a piperidyl group substituted by a lower alkoxycarbonyl group, (6) an unsaturated heterocyclic group selected from a pyridyl group, a pyrimidinyl group, a 4,5-dihydroxaolyl group and a thiazolyl group, (7) a lower alkanoyl group, (8) a lower alkanoyl group substituted by a di-lower alkylamino group, (9) a carbonyl group substituted by a pyridyl group, (10) a lower alkylsulfonyl group, (11) a lower alkoxycarbonyl group, (12) a lower alkyl group substituted by a di-lower alkylamino group, and (13) an oxo group. (xi) The compound according to (iii), wherein Ring B is a benzene ring substituted by a lower alkoxy group optionally substituted by a group selected from the followings: (1) a carboxyl group, (2) a lower alkoxycarbonyl group, (3) a lower alkoxy group, (4) a hydroxyl group, (5) an aminooxy group optionally substituted by a lower alkoxycarbonyl group, (6) a lower alkoxy group substituted by a lower alkoxy group, (7) a carbonyl group substituted by a morpholinyl group, a piperidyl group or a pyrrolidinyl group, (8) a carbonyl group substituted by a hydroxypiperidyl group, (9) a piperidylcarbonyl group substituted by a hydroxy-lower alkyl group, (10) a pyrrolidinylcarbonyl group substituted by a hydroxy-lower alkyl group, (11) a carbonyl group substituted by a lower alkyl-piperazinyl group, (12) an amino group optionally substituted by (a) a lower alkyl group, (b) a lower alkoxycarbonyl group, and (c) a lower alkanoyl group, (13) a carbamoyl group optionally substituted by a group selected from (a) a lower alkyl group, (b) a lower alkoxy-lower alkyl group, (c) a lower alkyl group substituted by a hydroxyl group, and (d) a lower alkyl group substituted by a di-lower alkylamino group; and (14) a group of the formula: -0-NH-C(=NH)NHa; and Y is an amino group optionally substituted by a group selected from the followings: (1) a piperidyl group substituted by a lower alkyl group, (2) a lower alkyl group, and (3) a lower alkoxycarbonyl group. (xii) The compound according to (iii), wherein Ring B is a benzene ring substituted by a lower alkoxy group optionally substituted by a group selected from the followings: (1) a carboxyl group, (2) a lower alkoxycarbonyl group, (3) a lower alkoxy group, (4) a hydroxyl group, (5) an aminooxy group optionally substituted by a lower alkoxycarbonyl group, (6) a lower alkoxy group substituted by a lower alkoxy group, (7) a carbonyl group substituted by a morpholinyl group, a piperidyl group or a pyrrolidinyl group, (8) a carbonyl group substituted by a hydroxypiperidyl group, (9) a piperidylcarbonyl group substituted by a hydroxy-lower alkyl group, (10) a pyrrolidinylcarbonyl group substituted by a hydroxy-lower alkyl group, (11) a carbonyl group substituted by a lower alkyl-piperazinyl group, (12) an amino group optionally substituted by (a) a lower alkyl group, (b) a lower alkoxycarbonyl group, and (c) a lower alkanoyl group, (13) a carbamoyl group optionally substituted by a group selected from (a) a lower alkyl group, (b) a lower alkoxy-lower alkyl group, (c) a lower alkyl group substituted by a hydroxyl group, and (d) a lower alkyl group substituted by a di-lower alkylamino group; and (14) a group of the formula: -0-NH-C(=NH)NH2; and Y is a cycloalkyl group optionally substituted by the followings: A) an amino group optionally substituted by the followings: (1) a lower alkyl croup, (2) a cycloalkyl group, (3) a hydroxy-lower alkyl group, (4) a 1,3-dioxanyl group substituted by a lower alkyl group, (5) a lower alkyl group substituted by an amino group optionally substituted by a group selected from (a) a lower alkyl group, (b) a lower alkanoyl group, (c) a lower alkanoyl group substituted by an amino group substituted by a lower alkyl group, and (d) a lower alkoxycarbonyl group, (6) a lower alkyl group substituted by a cyano group, (7) a lower alkyl group substituted by a lower alkoxycarbonyl group, (8) a lower alkyl group substituted by a carboxyl group, (9) a lower alkyl group substituted by a carbamoyl group optionally substituted by a lower alkyl group, (10) a lower alkyl group substituted by an aryl group, (11) a lower alkyl group substituted by a pyridyl group, (12) a lower alkoxycarbonyl group, (13) a lower alkanoyl group substituted by a di-lower alkyl amino group, (14) a lower alkanoyl group, (15) a pyrimidinyl group, (16) a lower alkanoyl group substituted by a morpholinyl group, (17) a lower alkylsulfonyl group, (18) a carbamoyl group substituted by a lower alkyl group, (19) a carbonyl group substituted by an aryl group, (20) a lower alkanoyl group substituted by a lower alkoxy group, (21) a lower alkanoyl group substituted by a lower alkanoyloxy group, (22) an aryl group substituted by a hydroxy group, and (23) a hydroxy-lower alkanoyl group; C) a lower alkyl group optionally substituted by a group selected from the followings: (1) an oxopyrrolidinyl group, (2) an oxomorpholinyl group, and (3) an amino group optionally substituted by (a) a lower alkyl group, (b) a lower alkoxycarbonyl group, and (c) a lower alkanoyl group. (xiii) The compound according to (iii), wherein Ring B is a benzene ring substituted by a carbonyl group substituted by a group selected from the followings: (1) a lower alkoxy group, (2) a hydroxyl group, (3) an amino group optionally substituted by (a) a lower alkyl group, (b) a lower alkoxy group, (c) a lower alkoxy- lower alkyl group, (d) a hydroxy-lower alkyl group, (e) a lower alkyl group substituted by an amino group optionally substituted by a lower alkyl group, (f) a lower alkyl group substituted by an aryl group, and (g) a lower alkyl group substituted by a pyridyl group, (4) a morpholinyl group, a pyrrolidinyl group, a piperidyl group or a thiomorpholinyl group, (5) a hydroxypiperidyl group, (6) a piperidyl group substituted by a hydroxy-lower alkyl group. (7) a pyrrolidinyl group substituted by a hydroxy-lower alkyl group, and (8) a lower alkyl-piperazinyl group; and Y is a saturated heterocyclic group optionally substituted by a group selected from the followings: (1) a lower alkyl group, (2) a lower alkyl group substituted by a pyridyl group (3) a piperidyl group substituted by a lower alkyl group, (4) a piperidyl group, (5) a piperidyl group substituted by a lower alkoxycarbonyl group, (6) an unsaturated heterocyclic group selected from a pyridyl group, a pyrimidinyl group, a 4,5-dihydroxaolyl group and a thiazolyl group, (7) a lower alkanoyl group, (8) a lower alkanoyl group substituted by a di-lower alkylamino group, (9) a carbonyl group substituted by a pyridyl group, (10) a lower alkylsulfonyl group, (11) a lower alkoxycarbonyl group, (12) a lower alkyl group substituted by a di-lower alkylamino group, and (13) an oxo group. (xiv) The compound according to (iii), wherein Ring B is a benzene ring substituted by a carbonyl group substituted by a group selected from the followings: (1) a lower alkoxy group, (2) a hydroxyl group, (3) an amino group optionally substituted by (a) a lower alkyl group, (b) a lower alkoxy group, (c) a lower alkoxy- lower alkyl group, (d) a hydroxy-lower alkyl group, (e) a lower alkyl group substituted by an amino group optionally substituted by a lower alkyl group, (f) a lower alkyl group substituted by an aryl group, and (g) a lower alkyl group substituted by a pyridyl group, (4) a morpholinyl group, a pyrrolidinyl group, a piperidyl group or a thiomorpholinyl group, (5) a hydroxypiperidyl group, (6) a piperidyl group substituted by a hydroxy-lower alkyl group, (7) a pyrrolidinyl group substituted by a hydroxy-lower alkyl group, and (8) a lower alkyl-piperazinyl group; and Y is an amino group optionally substituted by a group selected from the followings: (1) a piperidyl group substituted by a lower alkyl group, (2) a lower alkyl group, and (3) a lower alkoxycarbonyl group. (xv) The compound according to (iii) , wherein Ring B is a benzene ring substituted by a carbonyl group substituted by a group selected from the followings: (1) a lower alkoxy group, (2) a hydroxyl group, (3) an amino group optionally substituted by (a) a lower alkyl group, (b) a lower alkoxy group, (c) a lower alkoxy- lower alkyl group, (d) a hydroxy-lower alkyl group, (e) a lower alkyl group substituted by an amino group optionally substituted by a lower alkyl group, (f) a lower alkyl group substituted by an aryl group, and (g) a lower alkyl group substituted by a pyridyl group. (4) a morpholinyl group, a pyrrolidinyl group, a piperidyl group or a thiomorpholinyl group, (5) a hydroxypiperidyl group, (6) a piperidyl group substituted by a hydroxy-lower alkyl group, (7) a pyrrolidinyl group substituted by a hydroxy-lower alkyl group, and (8) a lower alkyl-piperazinyl group; and Y is a cycloalkyl group optionally substituted by the followings: A) an amino group optionally substituted by the followings: (1) a lower alkyl group, (2) a cycloalkyl group, (3) a hydroxy-lower alkyl group, (4) a 1,3-dioxanyl group substituted by a lower alkyl group, (5) a lower alkyl group substituted by an amino group optionally substituted by a group selected from (a) a lower alkyl group, (b) a lower alkanoyl group, (c) a lower alkanoyl group substituted by an amino group substituted by a lower alkyl group, and (d) a lower alkoxycarbonyl group, (6) a lower alkyl group substituted by a cyano group, (7) a lower alkyl group substituted by a lower alkoxycarbonyl group, (8) a lower alkyl croup substituted by a carboxyl group, (9) a lower alkyl group substituted by a carbamoyl group optionally substituted by a lower alkyl group, (10) a lower alkyl group substituted by an aryl group, (11) a lower alkyl group substituted by a pyridyl group. (12) a lower alkoxycarbonyl group, (13) a lower alkanoyl group substituted by a di-lower alkyl amino group, (14) a lower alkanoyl group, (15) a pyrimidinyl group, (16) a lower alkanoyl group substituted by a morpholinyl group, (17) a lower alkylsulfonyl group, (18) a carbamoyl group substituted by a lower alkyl group, (19) a carbonyl group substituted by an aryl group, (20) a lower alkanoyl group substituted by a lower alkoxy group, (21) a lower alkanoyl group substituted by a lower alkanoyloxy group, (22) an aryl group substituted by a hydroxy group, and (23) a hydroxy-lower alkanoyl group; C) a lower alkyl group optionally substituted by a group selected from the followings: (1) an oxopyrrolidinyl group, (2) an oxomorpholinyl group, and (3) an amino group optionally substituted by (a) a lower alkyl group, (b) a lower alkoxycarbonyl group, and (c) a lower alkanoyl group. (xvi) The compound according to (i), (ii), (iii), (iv), (vii), (x) or (xiii), wherein the saturated heterocyclic ring is a saturated 4- to 7-membered heterocyclic group containing 1 to 4 hetero aroms selected independently from the group consisting of nitrogen atom, oxygen atom and sulfur atom. (xvii) The compound according to (i), (ii), (iii), (iv), (vii), (x) or (xiii), wherein the saturated heterocyclic group is imidazclidinyl, piperazolidinyl, piperidyl, piperazinyl, morpholinyl, thiomorpholinyl, homopiperazinyl, homopiperidyl, pyrrclidinyl, oxazolidinyl or 1,3-dioxanyl. (xviii) The compound according to (iii), wherein the R""" is a halogen aton or a lower alkyl group; R^ is a group selected from the followings: A) a hydrogen atc", B) a lower alkyl group optionally substituted by a group selected from the followings: (1) a lower alkoxycarbonyl group, (2) a carboxyl group, (3) a carbamoyl group optionally substituted by a group selected from (a) a lower alkyl group, (b) a lower alkoxy-lower alkyl group, (c) a lower alkyl group substituted by a hydroxyl group, and (d) a lower alkoxy group, (4) a carbonyl group substituted by a morpholinyl group, (5) a piperidylcarbonyl group substituted by a hydroxy-lower alkyl group, (6) a pyrrolidinylcarbonyl group substituted by a hydroxy-lowsr alkyl group, (7) a carbonyl group substituted by a hydroxyl group-substituted piperidyl group, and (8) a hydroxyl group; C) a lower alkoxy group optionally substituted by a group selected from the followings: (1) a carboxyl group, (2) a lower alkoxycarbonyl group, (3) a lower alkoxy group, (4) a hydroxyl group, (5) an aminooxy group optionally substituted by a lower alkoxycarbonyl group, (6) a lower alkoxy group substituted by a lower alkoxy group, (7) a carbonyl group substituted by a morpholinyl group, a piperidyl group or a pyrrolidinyl group, (8) a carbonyl group substituted by a hydroxypiperidyl group, (9) a piperidylcarbonyl group substituted by a hydroxy- lower alkyl group, (10) a pyrrolidinylcarbonyl group substituted by a hydroxy-lower alkyl group, (11) a carbonyl group substituted by a lower alkyl-piperazinyl group, (12) an amino group optionally substituted by a group selected from (a) a lower alkyl group,(b) a lower alkoxycarbonyl group, and(c)a lower alkanoyl group, (13) a carbamoyl group optionally substituted by a group selected from (a) a lower alkyl group, (b) a lower alkoxy-lower alkyl group, (c) a lower alkyl group substituted by a hydroxyl group, and (d) a lower alkyl group substituted by a di-lower alkylamino group, and (14) a group of the formula: -0-NH-C(=NH)NHj; or D) a carbonyl group substituted by a group selected from the followings: (1) a lower alkoxy group, (2) a hydroxyl group, (3) an amino group optionally substituted by a group selected from (a) a lower alkyl group, (b) a lower alkoxy group, (c) a lower alkoxy-lower alkyl group, (d) a hydroxy-lower alkyl group, (e) a lower alkyl group substituted by an amino group optionally substituted by a lower alkyl group, (f)a lower alkyl group substituted by an aryl group, and (g) a lower alkyl group substituted by a pyridyl group, (4) a morpholinyl group, a pyrrolidinyl group, a piperidyl group or a thiomorpholinyl group, (5) a hydroxypiperidyl group, (6) a piperidyl group substituted by a hydroxy-lower alkyl group. (7) a pyrrolidinyl group substituted by a hydroxy-lower alkyl group, and (8) a lower alkyl-piperazinyl group; A is a single bond; and R^ is a hydrogen atcm. (xix) The compound according to (xviii), wherein Y is a group selected from the followings: (1) a piperidyl group substituted by a lower alkyl group, (2) a cycloalkyl group substituted by an amino group optionally substituted by a group selected from (a) a lower alkyl group, (b) a lower alkoxycarbonyl group, and (c) a lower alkanoyl group, (3) a cycloalkyl group substituted by a group of a formula selected from the formulas: that is optionally substituted by an oxo group, (4) a cycloalkyl group substituted by an amino group substituted by a lower alkyl group substituted by an amino group optionally substituted by a group selected from (a) a lower alkanoyl group and (b) a lower alkoxycarbonyl group, and (5) a cycloalkyl group substituted by a lower alkyl group substituted by an amino group optionally substituted by a lower alkyl group; and R' is a group selected from the followings: (1) a hydrogen atcn, (2) a cyano group. (3) an amino group optionally substituted by a lower alkyl group, (4) a hydroxyl group, (5) a lower alkoxy group, (6) a lower alkoxy group substituted by a lower alkoxy group, (7) a lower alkoxy group substituted by a hydroxyl group, (8) a lower alkoxy group substituted by an amino group optionally substituted by a lower alkyl group, (9) a lower alkoxycarbonyl group, (10) a carboxyl group, (11) an aminocarbonyl group optionally substituted by a group selected from (a) lower alkyl group, and (b) a hydroxy-lower alkyl group, (12) a morpholinylcarbonyl group, a pyrrolidinylcarbonyl group, a piperidylcarbonyl group or a thiomorpholinylcarbonyl group, (13) a piperidylcarbonyl group substituted by a hydroxy-lower alkyl group or a pyrrolidinylcarbonyl group substituted by a hydroxy-lower alkyl group, (14) a lower alkyl group, (15) a lower alkyl group substituted by a lower alkoxycarbonyl group, (16) a carboxy-lower alkyl group, (17) a lower alkyl group substituted by a carbamoyl group optionally substituted by a group selected from (a) lower alkyl group and (b) a hydroxy-lower alkyl group, (18) a lower alkyl group substituted by a morpholinylcarbonyl group, (19) a lower alkyl group substituted by a piperidylcarbonyl group substituted by a hydroxy-lower alkyl group, or a lower alkyl group substituted by a pyrrolidinylcarbonyl group substituted by a hydroxy-lower alkyl group, or (20) a hydroxy-lower alkyl group. ) (xx) The compound according to (xviii), wherein Y is a cycloalkyl group substituted by a group of a formula that is optionally substituted by an oxo group, or a cycloalkyl group substituted by an amino group optionally substituted by a group selected from (a) a lower alkyl group and (b) a lower alkanoyl group; and R^ is a group selected from the followings: (1) a hydrogen atom, (2) an amino group-substituted carbonyl group optionally substituted by a group selected from (a) a lower alkyl group and (b) a lower alkoxy-lower alkyl group, (3) a lower alkoxycarbonyl group, (4) a morpholinylcarbonyl group, a pyrrolidinylcarbonyl group, a piperidylcarbonyl group or a thiomorpholinylcarbonyl group, (5) a lower alkyl group substituted by a lower alkyl group-substituted carbamoyl group, (6) a carboxy-lower alkyl group, (7) a lower alkyl group substituted by a morpholinylcarbonyl group, and (8) a hydroxy-lower alkyl group. (xxi) The compound acccrding to (xviii), wherein Y is a cycloalkyl group substituted by an oxopyrrolidinyl group, a cycloalkyl group substituted by an oxomorpholinyl group or a cycloalkyl group substituted by an amino group optionally substituted by a group selected from (a) a lower alkyl group and (b) a lower alkanoyl group; and R^ is a group selected from the followings: (1) a hydrogen atom., (2) a hydroxy-lower alkyl group, (3) a carboxy-lower alkyl group, (4) a lower alkoxy group substituted by a lower alkoxy group, or (5) a carbonyl group substituted by a group selected from (a) an amino group optionally substituted by a lower alkyl group and (b) a morpholinyi group. (xxii) The compound according to (xviii), wherein Y is a group selected fromi the followings: (1) a cycloalkyl group substituted by an amino group substituted by a lower alkyl group having 1 to 3 carbon atoms, (2) a cycloalkyl group substituted by an amino group substituted by a lower alkanoyl group having 1 to 2 carbon atoms, (3) a cycloalkyl group substituted by a pyrrolidin-1-yl group optionally substituted by an oxo group, (4) a cycloalkyl group substituted by a piperidin-1-yl group optionally substituted by an oxo group, (5) a cycloalkyl group substituted by a morpholin-4-yl group optionally sucstituted by an oxo group, (6) a cycloalkyl group substituted by a lower alkyl group substituted by an amino group substituted by a lower alkyl group having 1 to 3 carbon atoms, or (7) a cycloalkyl group substituted by a lower alkyl group substituted by an amino group substituted by a lower alkanoyl group having 1 to 2 carbon atoms. (xxiii) A compound selected from trans-5-Dimethylaminocarbonyl-3-[4-(N-formyl-N-methylamino)cyclohexylcarbonylamino]-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide; trans-3-[4-(N-acetyl-N-methylamino)cyclohexyl¬carbonylamino] -5-(2-hydroxyethyl)-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide; trans-5-(morpholine-4-ylcarbonyl)-3-[4-(2-oxo-pyrroridin-1-yl)cyclohexylcarbonylamino]-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide; and trans-3-(4-dimethylaminocyclohexylcarbonylamino)-N-(5-chloropyridin-2-yl) benzofuran-2-carboxamide, or a pharmaceutically acceptable salt thereof, (xxiv) A benzofuran derivative having a partial (xxvi) A pharmaceutical composition, which comprises as an active ingredient a compound according to any one of (i) to (xxiv) above or a pharmaceutically acceptable salt thereof. (xxvii) A method for treatment of thrombosis, which comprises administering an effective amount of a compound according to any one of (i) to (xxiv) above or a pharmaceutically acceptable salt thereof, to a patient in need thereof (xxviii) Use of a compound according to any one of (i) to (xxiv) above or a pharmaceutically acceptable salt thereof in treatment of patients suffering from thrombosis. (xxix) A medicament for treatment of thrombosis substantially free of phospholipidosis, which comprises as an active ingredient a factor Xa (FXa) inhibitor showing a distribution volume of 0.1-3.0 L/kg and an FXa inhibitory effect with the IC30 value of 100 nM or below. (xxx) A medicament for treatment of thrombosis substantially free of hepatotoxicity, which comprises as an active ingredient an FXa inhibitor showing a distribution volume of 0.1-3.0 L/kg or below and an FXa inhibitory effect with the IC50 value of 100 nM or below. (xxxi) A medicament for oral administration for treatment of thrombosis substantially free of phospholipidosis, which comprises as an active ingredient a factor Xa (FXa) inhibitor showing a distribution volume of 0.1-3.0 L/kg and an FXa inhibitory effect with the IC50 value of 100 nM or below. (xxxii) A medicament for oral administration for treatment of thrombosis substantially free of hepatotoxicity, which comprises as an active ingredient an FXa inhibitor showing a distribution volume of 0.1-3.0 L/kg or below and an FXa inhibitory effect with the IC50 value of 100 nM or below. (xxxiii) A medicament for treatment of thrombosis substantially free of phospholipidosis, which comprises as an active ingredient an FXa inhibitor having a partial structure of the formula: (xxxiv) A medicament for treatment of thrombosis substantially free of hepatotoxicity, which comprises as an active ingredient an FXa inhibitor having a partial structure of the formula: and showing a distribution volume of 0.1-3.0 L/kg and an FXa inhibitory effect with the IC50 value of 100 nM or below. (xxxv) A medicament for oral administration for treatment of thrombosis, which causes substantially no phospholipidosis and comprises as an active ingredient an FXa inhibitor having a partial structure of the formula: and showing a distribution volume of 0.1-3.0 L/kg and an FXa inhibitory effect with the IC50 value of 100 nM or below. (xxxvi) A medicament for oral administration for treatment of thrombosis substantially free of hepatotoxicity, which comprises as an active ingredient an FXa inhibitor having a partial structure of the formula: and showing a distribution volume of 0.1-3.0 L/kg and an FXa inhibitory effect with the IC50 value of 100 nM or below. BEST MODE FOR CARRYING OUT THE INVENTION The compound [1] of the present invention will be hereinafter described in detail. The term "lower" used in the definition of the formulas herein described means unless otherwise noted a straight- or branched-carbon chain having 1 to 6 carbon atoms. Thus, examples of "lower alkyl group" include methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, neopentyl, tert-pentyl, 1-methylbutyl, 2-methylbutyl, 1,2-dimethylpropyl, hexyl, isohexyl, 1-methylpentyl, 2-methylpentyl, 3-methylpentyl, 1,1-dimethylbutyl, 1, 2-dimethylbutyl, 2,2-dimethylbutyl, 1,3-dimethylbutyl, 2,3-dimethylbutyl, 3,3-dimethylbutyl, 1-ethylbutyl, 2-ethylbutyl, 1,1,2-trimethylpropyl, 1,2,2-trimethylpropyl, 1-ethyl-l-methylpropyl, l-ethyl-2-methylpropyl, etc. Among them, alkyl groups having 1 to 4 carbon atoms are preferred, and methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec-butyl and tert-butyl are especially preferred. The term "lower alkoxy group" means a substituent wherein an oxygen atom is bound to the above-mentioned alkyl group. Among them, alkoxy groups having 1 to 4 carbon atoms are preferred, and methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy, sec-butoxy and tert-butoxy groups are especially preferred. Examples of "carbon chain optionally having a double bond within or at the end(s) of the chain" include "lower alkylene group", "lower alkenylene group" and "lower alkenylidene group". Examples of 'lower alkylene group" include a straight-or branched-chain alkylene group having 1 to 6 carbon atoms, specifically, methylene, ethylene, trimethylene, tetramethylene, pentamethylene, hexamethylene, etc. Among them, an alkylene group having 1 to 5 carbon atoms is preferred. Examples of "lower alkenylene group" include a straight- or branched-chain alkenylene group having 2 to 6 carbon atoms, specifically, vinylene, propenylene, butenylene, pentenylene, etc. Among them, an alkenylene group having 2 to 5 carbon atoms is preferred. Examples of "lower alkenylidene group" include alkenylidenes having' 2 to 6 carbon atoms, specifically, vinylidene, propenylidene, butenylidene, pentenylidene, etc. Examples of "lower alkanoyl group" include alkanoyl groups formed by removing a "OH" group from the carboxyl group of a lower carboxylic acid, specifically, formyl, acetyl, propionyl, butyryl, etc. The "saturated heterocyclic group" means a saturated heterocyclic group containing 1 to 4 hetero atoms selected independently from the group consisting of nitrogen atom, oxygen atom and sulfur atom, preferably a 4- to 7-membered heterocyclic group containing 1 to 4 hetero atoms selected independently from the group consisting of nitrogen atom, oxygen atom and sulfur atom. A condensed heterocyclic ring is included. Specific examples include imidazolidinyl, pyrazolidinyl, piperidyl, piperazinyl, morpholinyl, thiomorpholinyl, homopiperazinyl, homopiperidyl, pyrrolidinyl, oxazolidinyl, 1,3-dioxanyl, etc. Above all, piperidyl, piperazinyl, homopiperazinyl and pyrrolidinyl are preferred. The "unsaturated heterocyclic group" means an unsaturated heterocyclic group containing 1 to 4 hetero atoms selected independently from the group consisting of nitrogen atom, oxygen atom and sulfur atom, preferably a 4-to 7-membered heterocyclic group containing 1 to 4 hetero atoms selected independently from the group consisting of nitrogen atom, oxygen atom and sulfur atom. A condensed heterocyclic ring is included. Specific examples include pyridyl, pyrimidinyl, pyrazinyl, furyl, thienyl, pyrrolyl, imidazolyl, pyrazolyl, oxazolyl, isoxazolyl, 4,5-dihydro-oxazolyl, thiazolyl, isothiazolyl, etc. Above all, pyridyl, pyrimidinyl, pyrazinyl, thienyl, oxazolyl, 4,5-dihydro-oxazolyl and thiazolyl are preferred. Examples of "halogen atom" include fluorine, chlorine, bromine or iodine atom. Above all, fluorine, chlorine or bromine atom is preferred. The term "cycloalkyl group" means a cyclic lower alkyl group, preferably a cyclohexyl group. The term "aryl group" means a phenyl or a naphthyl group, preferably phenyl group. The symbol "Y", when A and Y are bound via a double bond, refers to the corresponding bivalent group. The pharmaceutically acceptable salt of the compound [1] includes a salt with an inorganic acid such as hydrochloric acid, hydrobromic acid, hydroiodic acid, sulfuric acid, nitric acid, phosphoric acid, etc.; a salt with an organic acid such as formic acid, acetic acid, propionic acid, oxalic acid, malonic acid, succinic acid, fumaric acid, maleic acid, lactic acid, malic acid. tartaric acid, citric acid, methanesulfonic acid, ethanesulfonic acid, benzenesulfonic acid, etc.; salt with an acidic amino acid such as aspartic acid, glutamic acid, etc.; salt with a metal such as sodium, potassium, magnesium, calcium, aluminium, etc.; salt with an organic base such as methylamine, ethylamine, ethanolamine, etc.; or a salt with a basic amino acid such as lysine, ornithine, etc. The compound [1] of the present invention can be in the form of quaternary ammonium salt and such a quaternary ammonium salt falls within the scope of the present compound [1]. Further, the compound [1] of the present invention includes a intramolecular salt. hydrate, solvate or crystalline polymorphism, etc. Besides, when the compound [1] has a double bond(s), it may exist in the form of a geometrical isomer (cis, trans), when the compound [1] has an unsaturated bond such as carbonyl, it may exist in the from of a tautomerism, when the compound [1] has an asymmetric carbon atom(s), it can exist as an optical isomer, and the present invention encompass these isomers and a mixture thereof. Additionally, the compound [1] of the present invention encompasses a prodrug of a compound as mentioned above. Examples of a prodrug include those prepared by protecting a functional group such as an amino or carboxy group of a compound above with a conventional protecting group. The compound of the present invention may be prepared by the following processes. [Process A] Among the compound [1] of the present invention, a compound wherein A is a single bond or a carbon chain optionally having a double bond within or at the end(s) of wherein A'' is a single bond or a carbon chain optionally having a double bond within or at the end(s) of the chain, and the other symbols are the same as defined above, can be prepared by reacting an amino compound of the formula [2]: wherein the symbols are the same as defined above, with a carboxylic acid compound of the formula [3-A] : YA^-COOH [3-A] wherein the symbols are the same as defined above, or a reactive derivative thereof at its carboxyl group. [Process B] Among the compound [1] of the present invention, a compound wherein A is an oxygen atom, or A is a single bond, and Y is an optionally substituted amino group, i.e., the other symbols are the same as defined above, can be prepared by reacting the compound [2] above with a compound of the formula [3-Bl]: YA^-H [3-Bl] wherein the symbols are the same as defined above, and a compound of the formula [3-B2]: L^-CO-L^ [3-B2] wherein L^ and L^ are the same or different and each a leaving group. The compound [1] can also be prepared, if necessary, through the mutual conversion, wherein the residue Y and/or the substituent for Ring B (R^) of resulting compound [1-A] or [1-B] is adequately converted into a compound [1] through the mutual conversion by alkylation, reductive alkylation, amidation, sulfonyl-amidation, amidino-etherification, arylation, reduction, dealkylation, hydrolysis, quaternary amination, formylation, pyrrolylation, protection of amino or carboxyl group and deprotection, etc. [Manufacturing Process for Starting Materials: Preparation of compound [2]] The compound [2] can be prepared by a process comprising: converting the aldehyde group of a compound of the formula [10] : wherein the symbols are the same as defined above, into cyano group to give a compound of the formula [9]: wherein the symbols are the same as defined above, reacting the compound [9] with a compound of the formula wherein L^ is a leaving group and P^ is a protecting group for carboxyl group, to give a compound of the formula [7] : wherein the symbols are the same as defined above, deprotecting the protecting group P^ of the compound [7] to give a compound of the formula [6]: wherein the symbols are the same as defined above, reacting the compound [6], if necessary, after converting into a reactive derivative at the carboxyl group thereof, wherein the symbols are the same as defined above, to give a compound of the formula [4]: and subjecting the compound [4] to cyclization. Further, the compound [4] can also be prepared by reacting a compound of the formula [9] with a compound of wherein L" is a leaving group and the other symbols are the same as defined above. wherein the symbols are the same as defined above. The Processes [A] and [B] above can be carried out in the following manner. [Process A] The reaction where a compound [1-A] is prepared using a compound [2] and a compound [3-A] can be carried out in a conventional manner for amidation. That is, the reaction can be carried out by reacting a compound [2] with a compound [3-A], a reactive derivative thereof, or a salt thereof in the presence or absence of a condensing agent, and if necessary, in the presence of an acid scavenger, in an appropriate solvent. The condensing agent includes conventional agents such as N,N-dicyclohexylcarbodiimide (DCC), l-ethyl-3-(3-dimethylaminopropyDcarbodiimide (EDC) or a hydrochloride thereof, carbonyldiimidazole (CDI), diphenylphosphoryl-azide (DPPA), diethyl cyanophosphonate (DEPC), etc. Above all, DCC, EDC or a hydrochloride thereof is preferred. Examples of the reactive derivative of the compound [3-A] include those conventionally used such as an acid halide, a mixed anhydride, a reactive ester, etc. Examples of an activator that can be used for converting the compound [3-A] into the reactive derivative thereof include thionyl chloride, thionyl bromide, oxalyl chloride, N-hydroxylamines such as 1-hydroxysuccinimide, 1-hydroxybenzotriazole, etc., and phenols such as p-nitrophenol, etc. Above all, thionyl chloride, oxalyl chloride, 1-hydroxysuccinimide and 1-hydroxybenzotriazole are preferred. The acid chloride method is especially preferable. Examples of the salt of a compound [3-A] or a reactive derivative of the compound [3-A] include a salt with an inorganic acid such as hydrochloric acid, hydrobromic acid, sulfuric acid, etc. An acid scavenger is also usable depending on the method to be employed, which includes inorganic or organic bases. The present reaction may be facilitated when it is carried out in the presence of a base or by using such a base as a solvent. Examples of inorganic bases include inorganic bases such as alkali metal carbonates (sodium carbonate, potassium carbonate, cesium carbonate, etc.), alkali earth metal carbonates (calcium carbonate, etc.), alkali metal hydrogen carbonates (sodium hydrogen carbonate. potassium hydrogen carbonate, etc.), alkali metal hydroxides (sodium hydroxide, potassium hydroxide, lithium hydroxide, etc.). Examples of organic bases include tri- lower alkylamines (triethylamine, tributylamine, diisopropylethylamine, etc.), tertiary-amines (1,4- diazabicyclo[2.2.2]octane, 1,5-diazabicyclo[4.3.0]non-5-ene, 1,8-diazabicyclo[5.4.0]undec-7-ene, etc.), amines (N,N- dimethylaniline, N,N-diethylaniline, 4- dimethylaminopyridine, etc.), pyridine, lutidine, collidine, etc. Above all, triethylamine, diisopropylethylamine, 4-dimethylaminopyridine, or pyridine is preferred for carrying out the reaction. The present reaction can be carried out in the presence or absence of a solvent, preferably in the presence of a solvent. Examples of the solvent include any inert solvent which does not disturb the reaction, such as halogenated hydrocarbons (chloroform, dichloromethane, dichloroethane, etc.), aromatic hydrocarbons (benzene, toluene, xylene, etc.), ethers (diethyl ether, diisopropyl ether, tetrahydrofuran, dioxane, 1,2-dimethoxyethane, etc.), esters (ethyl acetate, etc.), amides (N,N-dimethylformamide, N,N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, etc.), nitriles (acetonitrile, etc.), dimethylsulfoxide, pyridine, 2,6-luthidine, 6tc., a mixed solvent comprising two or more of these solvents, if necessary, and also a mixture of any one(s) of these solvents and water. It is preferred to select any appropriate solvent depending on the method used. Above all, dichloromethane, chloroform, toluene, xylene, tetrahydrofuran, dioxane, N,N-dimethylformamide, N,N-dimethylacetamide, 1,3-dimethyl-2- imidazolidinone, pyridine, and the like are preferred, and dichloromethane, chloroform, N,N-dimethylformamide and pyridine are especially preferred. The present reaction can be carried out in a wide range of temperature from a temperature of under cooling to under heating. For example, the reaction can be preferably carried out at a temperature of -10°C to the boiling point of the reaction mixture, especially from under ice-cooling to 60°C. [Process B] The process wherein the compound [1-B] is prepared by reacting a compound [2] with compounds of the formulas [3-Bl] and [3-B2], respectively, can be carried out in accordance with a conventional method for carbonylation in the presence of an appropriate acid scavenger in an appropriate solvent. Examples of a leaving group for a compound of the formula [3-B2] include a halogen atom. Examples of a compound [3-B2] include phosgene, triphosgene, GDI, etc., and triphosgene is preferred. Examples of acid scavenger used in the reaction include both the inorganic and organic bases. Examples of inorganic bases include alkali metal carbonates (sodium carbonate, potassium carbonate, cesium carbonate, etc.) and alkali metal hydrogen carbonates (sodium hydrogen carbonate, potassium hydrogen carbonate, etc.). Examples of organic bases include tri-lower alkylamines (triethylamine, tributylamine, diisopropylethylamine, etc.), tertiary-amines (1,4-diazabicyclo[2.2.2]octane, 1,5-diazabicyclo [4.3.C]non-5-ene, 1,8-diazabicyclo[5.4.0]-undec-7-ene, etc.), amines (N,N-dimethylaniline, N,N- diethylaniline, 4-dimethylaminopyridine, etc.), pyridine, lutidine, collidine, etc. Above all, triethylamine, diisopropylethylamine, 4-dimethylaminopyridine and pyridine are preferred. Examples of the solvent include any inert solvent which does not disturb the reaction, such as halogenated hydrocarbons (chloroform, dichloromethane, dichloroethane, etc.), ethers (diethyl ether, diisopropyl ether, tetrahydrofuran, dioxane, 1,2-dimethoxyethane, etc.), esters (ethyl acetate, etc.), amides (N,N-dimethylformamide, N,N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, etc.), nitriles (acetonitrile, etc.), pyridine, 2,6-luthidine, etc., and a mixed solvent comprising two or more of these solvents, if necessary. It is preferred to select any appropriate solvent depending on the method used. Above all, dichloromethane, tetrahydrofuran, N,N-dimethylformamide, N,N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, pyridine, and the like are preferred, and dichloromethane and N,N-dimethylformamide are especially preferred. The present reaction can be carried out in a wide range of temperature from -78 °C to the boiling point of the reaction mixture. For example, the reaction can be preferably carried out at a temperature of -10°C to the boiling point of the reaction mixture, especially at a temperature of under ice-cooling to room temperature. Furthermore, after carrying out the Processes [A] and [B], the objective compound [1] can also be obtained, if necessary, through a mutual conversion by conducting the following reaction(s), on condition that the resulting compounds of the formula [1-A] and/or [1-B] has one or more moieties available to a further reaction (s) in the substituent(s) for group Y and/or Ring B (mainly referring to, for example, a protecting group for amine, alcoholic or phenolic OH, ester, carboxylic acid, nitro, halogen, etc.) •The reactions for alkylation, reductive alkylation, amidation, sulfonyl-amidation, amidino-etherification, arylation, reduction, dealkylation, hydrolysis, quaternary amination, pyrrolylation, protection and deprotection of amino or carboxyl group, which are conducted when needed, can be carried out as follows. The alkylation can be carried out in a conventional manner, when needed. For example, this reaction can be carried out by reacting a compound [1] with an alkyl halide such as alkyl chloride, alkyl bromide, alkyl iodide, etc. in the presence or absence of a base in an appropriate solvent. Examples of the bases usable include inorganic and organic bases. The inorganic bases include alkali metal carbonates (sodium carbonate, potassium carbonate, cesium carbonate, etc.), alkali metal hydrogen carbonates (sodium hydrogen carbonate, potassium hydrogen carbonate, etc.), alkali metal hydroxides (sodium hydroxide, potassium hydroxide, lithium hydroxide, etc.). Examples of organic bases include tri-lower alkylamines (triethylamine, tributylamine, diisopropylethylamine, etc.), tertiary- amines (1,4-diazabicyclo[2.2.2]octane, 1,5- diazabicyclo[4.3.0]-non-5-ene, 1,8- diazabicyclo[5.4.0]undec-7-ene, etc.), pyridine, lutidine, collidine, etc. Above all, alkali metal carbonates such as sodium carbonate, potassium carbonate and cesium carbonate, triethylamine, diisopropylethylamine, pyridine, etc. are preferred. An alkali metal iodide such as lithium iodide, sodium iodide, potassium iodide, etc. can also be added, which may facilitate the reaction. Any inert solvents which do not disturb the reaction can be used without limitation, and examples thereof include ethers (diethyl ether, diisopropyl ether, tetrahydrofuran, dioxane, 1,2-dimethoxyethane, etc.), amides (N,N-dimethylformamide, N,N-dimethylacetamide, 1,3- dimethyl-2-imidazolidinone, etc.), nitriles (acetonitrile, etc.), alcohols (methanol, ethanol, propanol, etc.), dimethylsulfoxide, pyridine, 2, 6-luthidine, etc., and a mixed solvent comprising two or more of these solvents, if necessary. It is preferred to select any appropriate solvent depending on the method used. Above all, tetrahydrofuran, N,N-dimethylformamide, N,N- dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, acetonitrile, ethanol, dimethylsulfoxide, etc., are preferred and N,N-dimethylformamide, acetonitrile, ethanol, and a mixed solvent thereof are more preferred. The present reaction can be carried out in a wide range of temperature from a temperature of under cooling to under heating, preferably at -10°C to the boiling point of the reaction mixture. The reductive alkylation can be carried out in a conventional manner, when needed. For example, this reaction can be carried out by reacting a compound [1] with a corresponding carbonyl compound in the presence of an appropriate metal hydride reducing agent, or under the condition for catalytic reduction in the presence of an appropriate metal catalyst, in an appropriate solvent. In the reaction, any conventional metal hydride reducing agents can be used without limitation; however, reducing agents which do not affect the amide bonds etc., such as sodium borohydride, sodium triacetoxy borohydride, sodium cyano borohydride, etc. are preferred. Besides, organic acids such as acetic acid, etc. or mineral acids such as hydrochloric acid, etc. can also be added to the present reaction, which may facilitate the reaction. Furthermore, when the compound [1] used is an amine in the form of a salt with a mineral acid such as hydrochloric acid, etc., an appropriate neutralizing agent such as an organic base (e.g., triethylamine) or an alkali metal acetate (e.g., sodium acetate) may be added to the reaction, which may facilitate the reaction. Any inert solvents which do not disturb the reaction can be used without limitation, and examples thereof include halogenated hydrocarbons (chloroform, dichloromethane, dichloroethane, etc.), ethers (diethyl ether, diisopropyl ether, tetrahydrofuran, dioxane, 1,2-dimethoxyethane, etc.), amides (N,N-dimethylformamide, N,N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, etc.), nitriles (acetonitrile, etc.), aromatic hydrocarbons (benzene, toluene, xylene, etc.), alcohols (methanol, ethanol, propanol, etc.), water, and a mixed solvent comprising two or more of these solvents, if necessary. It is preferred to select any appropriate solvent depending on the method used. Above all, dichloromethane. dichloroethane, tetrahydrofuran, 1,2-dimethoxyethane, methanol, ethanol, propanol, etc. are preferred, and dichloromethane, dichloroethane and tetrahydrofuran are especially preferred. The reaction can be carried out in a wide range of temperature from a temperature of under cooling to under heating. For example, the reaction can be preferably carried out at a temperature of -10°C to the boiling point of the reaction mixture, especially from under ice-cooling to the boiling point of the mixture. The present reaction can similarly be carried out according to the catalytic hydrogenation in the presence of a metal catalyst. Examples of the metal catalyst include palladium-carbon, platinum-carbon, platinum oxide, Raney Nickel, etc. Besides, organic acids such as acetic acid, etc. or mineral acids such as hydrochloric acid, etc. can also be added to the present reaction, which may facilitate the reaction. Furthermore, when the compound [1] used is an amine in the form of a salt with a mineral acid such as hydrochloric acid, etc., an appropriate neutralizing agent such as an organic base (e.g., triethylamine) or an alkali metal acetate (e.g., sodium acetate) may be added to the reaction, which may facilitate the reaction. Any inert solvents which do not disturb the reaction can be used without limitation, and examples thereof include ethers (diethyl ether, ' diisopropyl ether, tetrahydrofuran, dioxane, 1,2-dimethoxyethane, etc.), amides (N,N-dimethylformamide, N,N-dimethylacetamide, 1,3- dimethyl-2-imidazolidinone, etc.), aromatic hydrocarbons (benzene, toluene, xylene, etc.), alcohols (methanol, ethanol, propanol, etc.), water, and a mixed solvent comprising two or more of these solvents, if necessary. It is preferred to select any appropriate solvent depending on the method used. Above all, tetrahydrofuran, N,N-dimethylformamide, methanol, ethanol, etc. are preferred, and tetrahydrofuran, methanol, ethanol, etc. are especially preferred. The reaction can be carried out in a wide range of temperature from a temperature of under cooling to under heating. For example, the reaction can be preferably carried out at a temperature of -10°C to the boiling point of the reaction mixture, especially from under ice-cooling to room temperature. The amidation can be carried out in a manner similar to the above-mentioned reaction between a compound [2] and a compound [3-A] , when needed. The sulfonylamidation can be carried out in a conventional manner, when needed. For example, this reaction can be carried out by reacting a compound [1] with an optionally substituted alkylsulfonic acid halide in the presence or absence of a base in an appropriate solvent. For the reaction, similar acid scavenger, solvent and reaction temperature to those used in the amidation reaction between a compound [2] and a compound [3-A] above can be employed. The amidino-etherification can be carried out in a conventional manner, when needed. For example, the reaction can be carried out by reacting a compound [1] with 2-bromoethyl isocyanate or 2-chloroethyl isocyanate in the presence or absence of an appropriate acid scavenger in an appropriate solvent. Examples of the bases usable include inorganic and organic bases. The inorganic bases include alkali metal carbonates (sodium carbonate, potassium carbonate, cesium carbonate, etc.), alkali metal hydrogen carbonates (sodium hydrogen carbonate, potassium hydrogen carbonate, etc.), etc. Examples of organic bases include tri-lower alkylamines (triethylamine, tributylamine, diisopropylethylamine, etc.), tert-amines (1,4-diazabicyclo[2.2.2]octane, 1, 5-diazabicyclo [4.3.0]-non-5-ene, 1,8-diazabicyclo[5.4.0]undec-7-ene, etc.), amines (N,N-dimethylaniline, N,N-diethylaniline, 4-dimethyl-aminopyridine, etc.), pyridine, lutidine, collidine, etc. Above all, triethylamine and diisopropylethylamine are preferred. The present reaction can be carried out in the presence or absence of a solvent, preferably in the presence of a solvent. Any inert solvents which do not disturb the reaction can be used without limitation, and examples thereof include halogenated hydrocarbons (chloroform, dichloromethane, dichloroethane, etc.), aromatic hydrocarbons (benzene, toluene, xylene, etc.), ethers (diethyl ether, diisopropyl ether, tetrahydrofuran, dioxane, 1,2-dimethoxyethane, etc.), amides (N,N-dimethylformamide, N,N-dimethylacetamide, 1, 3-dimethyl-2-imidazolidinone, etc.), nitriles (acetonitrile, etc.), dimethylsulfoxide, pyridine, 2,6-luthidine, etc., and a mixed solvent comprising two or more of these solvents, if necessary. Above all, dichloromethane, tetrahydrofuran, N,N-dimethylformamide, etc. are preferred and tetrahydrofuran is more preferred. The reaction can be carried out in a wide range of temperature from a temperature of under cooling to under heating. For example, the reaction can be preferably carried out at a temperature of -10°C to the boiling point of the reaction mixture, especially from under ice-cooling to room temperature. The arylation can be carried out in a conventional manner, when needed. For example, the reaction can be carried out by reacting a compound [1] with a halogenated aryl compound in the presence or absence of an appropriate base in an appropriate solvent. Examples of the bases usable include inorganic and organic bases. The inorganic bases include alkali metal carbonates (sodium carbonate, potassium carbonate, cesium carbonate, etc.), alkali metal hydrogen carbonates (sodium hydrogen carbonate, potassium hydrogen carbonate, etc.), etc. Examples of organic bases include tri-lower alkylamines (triethylamine, tributylamine, diisopropylethylamine, etc.), tert-amines (1,4-diazabicyclo[2.2.2]octane, 1,5-diazabicyclo[4.3.0]-non-5-ene, 1,8-diazabicyclo[5.4.0]undec-7-ene, etc.), amines (N,N-dimethylaniline, N,N-diethylaniline, 4-dimethylaminopyridine, etc.), pyridine, lutidine, collidine, etc. Above all, triethylamine, diisopropylethylamine, potassium carbonate, etc. are preferred. The present reaction can be carried out in the presence or absence of a solvent, preferably in the presence of a solvent. Any inert solvents which do not disturb the reaction can be used without limitation, and examples thereof include aromatic hydrocarbons (benzene, toluene, xylene, etc.), ethers (diethyl ether, diisopropyl ether, tetrahydrofuran, dioxane, 1,2-dimethoxyethane, etc.), amides (N, N-dimethylformamide, N,N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, etc.), nitriles (acetonitrile, etc.), alcohols (methanol, ethanol, propanol, 2-butanol, etc.), dimethylsulfoxide, pyridine, 2, 6-luthidine, etc., and a mixed solvent comprising two or more of these solvents, if necessary. Above all, xylene, tetrahydrofuran, N,N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, ethanol, 2-butanol, etc. are preferred and tetrahydrofuran, N,N-dimethylacetamide and 2-butanol are more preferred. The reaction can be carried out in a wide range of temperature from a temperature of under cooling to under heating. For example, the reaction can be preferably carried out at a temperature of -lO'C to the boiling point of the reaction mixture, especially from room temperature to the boiling point of the reaction mixture. The reduction can be carried out in a conventional manner, when needed. For example, the reaction can be carried out by reacting a compound [1] with an appropriate reducing agent, or with hydrogen in the presence of a metal catalyst in an appropriate solvent. In the reaction, any conventional reducing agents can be used without limitation; however, metal hydride reducing agents such as lithium aluminium hydride, lithium borohydride, sodium borohydride, etc., metals such as zinc, iron, stannum, etc., and metal salts such as tin chloride, etc. are preferred, and metals such as stannum, etc. and metal salts such as tin chloride, etc. are more preferred. In the catalytic hydrogenation, any conventional metal catalysts can be used without limitation; however, palladium-carbon, Raney Nickel, Raney Cobalt, platinum oxide, etc. are preferred and metals such as Raney Nickel, etc. are more preferred. Furthermore, depending on the method used, the reaction can sometimes be facilitated when it is carried out under an acidic condition in the co¬existence of a mineral acid such as hydrochloric acid, etc. In the reaction where a metal hydride reducing agent is used, any inert solvents which do not disturb the reaction can be used without limitation, and examples thereof include ethers (diethyl ether, diisopropyl ether, tetrahydrofuran, dioxane, 1,2-dimethoxyethane, etc.), amides (N, N-dimethylformamide, N,N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, etc.), aromatic hydrocarbons (benzene, toluene, xylene, etc.), alcohols (methanol, ethanol, propanol, etc.), water, etc., and a mixed solvent comprising two or more of these solvents, if necessary. It is preferred to select any appropriate solvent depending on the method used. In the reaction where a metal such as zinc, iron, stannum, etc., or a metal salt such as tin chloride, etc. is used, any inert solvents which do not disturb the reaction can be used withour limitation, and examples thereof include water, alcohols (methanol, ethanol, propanol etc.), esters (ethyl acetate, etc.), ethers (diethyl ether, diisopropyl ether, tetrahydrofuran, 1,2-dimethoxyethane, etc.), amides (N,N-dimethylformamide, N,N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, etc.), nitriles (acetonitrile, etc.), aromatic hydrocarbons (benzene, toluene, xylene, etc.), and a mixed solvent comprising two or more of these solvents, if necessary. It is preferred to select any appropriate solvent depending on the method used. Above all, ethyl acetate, water, or a mixed solvent comprising water and an alcohol, an ether, an amide, a nitrile etc. is preferred. In the reaction where hydrogenation is carried out in the presence of a metal catalyst, any inert solvents which do not disturb the reaction can be used without limitation, and examples thereof include alcohols, ethers, aliphatic hydrocarbons, aromatic hydrocarbons, amides, esters (ethyl acetate, etc.), organic acids (formic acid, acetic acid, propionic acid, trifluoroacetic acid, etc.), and a mixed solvent comprising two or more of these solvents, if necessary. It is preferred to select any appropriate solvent depending on the method used. The present reaction can be carried out in a wide range of temperature from a temperature of under cooling to under heating. For example, the reaction can be preferably carried out at a temperature of -10°C to the boiling point of the reaction mixture. The hydrogen pressure used in the catalytic hydrogenation reaction is generally about 1-100 atm. The reaction time for the present reaction varies depending on the kind of the reducing agent or the activity of the catalyst used; however, it is generally between about 10 minutes and 24 hours. The dealkylation can be carried out in a conventional manner, when needed. For example, this reaction can be carried out by reacting a compound [i] with an appropriate dealkylating agent in an appropriate solvent or without solvent. Any conventional dealkylating agents can be used without limitation, and preferred examples thereof include boron tribromide, boron trichloride, iodotrimethylsilane, aluminium (III) chloride, pyridinium chloride, etc., and boron tribromide, iodotrimethylsilane, etc. are preferred. Any inert solvents which do not disturb the reaction can be used without limitation, and examples thereof include halogenated hydrocarbons (chloroform, dichloromethane, dichloroethane, etc.), amides (N,N-dimethylformamide, N,N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, etc.), nitriles (acetonitrile, etc), and a mixed solvent comprising two or more of these solvents, if necessary. It is preferred to select any appropriate solvent depending on the method used. The reaction can be carried out in a wide range of temperature from a temperature of under cooling to under heating, preferably from -78°C to the boiling point of the reaction mixture. The hydrolysis can be carried out in a conventional manner, when needed. The quaternary amination can be carried out in a conventional manner, when needed. This reaction can be conducted in a similar manner to the above-mentioned alkylation. The pyrrolylation can be carried out by, for example, reacting a compound having an amino group with tetrahydro-2,5-dimethoxyfuran in the presence of an acid in an appropriate solvent. Examples of the acids include an organic acid such as formic acid, acetic acid, propionic acid, trifluoroacetic acid, etc., and a mineral acid such as hydrochloric acid, etc, which acids can also be used as a solvent. Any inert solvents, in addition to the above-mentioned organic acids and mineral acids, which do not disturb the reaction can be used without limitation, and examples thereof include halogenated hydrocarbons (chloroform, dichloromethane, dichloroethane, etc.), aromatic hydrocarbons (benzene, toluene, xylene, etc.), ethers (diethyl ether, diisopropyl ether, tetrahydrofuran, dioxane, 1,2-dimethoxyethane, etc.), amides (N,N-dimethylformamide, N,N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, etc.), nitriles (acetonitrile, etc.), etc., and organic acids are preferred. ' The reaction can be carried out in a wide range of temperature from a temperature of under cooling to under heating, preferably from -78°C to the boiling point of the reaction mixture. The protection of an amino or a carboxy group, or deprotection of the protected group can be carried out, when needed, according to any of known methods. [Manufacturing Process for Starting Materials: Preparation of compound [2] ] (1) The reaction for converting the aldehyde group of the compound [10] into a cyano group to give the compound [9] can be carried out by reacting the compound [10] with a hydroxylamine or hydrochloride thereof in the presence or absence of sodium formate in an appropriate solvent. A dehydrating agent may be added. The solvent available includes an organic lower fatty acid such as formic acid; however, it is preferred to select an appropriate solvent depending on the method used. The present reaction can be carried out in a wide range of temperature from a temperature of under cooling to under heating. For example, the reaction can be preferably carried out at a temperature of under ice-cooling to the boiling point of the reaction mixture, especially at the boiling point of the reaction mixture. (2) The next reaction between the resulting compound [9] and the compound [8] to give the compound [7] can be carried out in a conventional manner for 0-alkylation of a phenol compound. The present reaction can be carried out by reacting the compound [9] with the compound [8] in an appropriate solvent in the presence of a base or by using such a base as the solvent. The leaving group in the compound [8] can be preferably, for example, a halogen atom. Examples of a preferred protecting group for the carboxyl group of the compound [8] include a lower alkyl group and a phenyl-lower alkyl group. Examples of the base usable include both the inorganic and organic bases such as alkali metal carbonates (sodium carbonate, potassium carbonate, etc.), alkali metal hydrogen carbonates (sodium hydrogen carbonate, potassium hydrogen carbonate, etc.), alkali metal hydroxides (sodium hydroxide, potassium hydroxide, lithium hydroxide, etc.), alkali metal hydrides (sodium hydride, etc.), alkali metal alkoxides (sodium methoxide, potassium t-butoxide, etc.), tri-lower alkylamines (triethylamine, tributylamine, diisopropylethylamine, etc.), tertiary-amines (1,4- diazabicyclo[2.2.2]octane, 1,5-diazabicyclo[4.3.0]non-5-ene, 1,8-diazabicyclo[5.4.0]undec-7-ene, etc.), amines (N,N- dimethylaniline, N,N-diethylaniline, 4- dimethylaminopyridine, etc.), pyridine, lutidine, collidine, etc. Above all, alkali metal carbonate, diisopropylethylamine, pyridine, etc. are preferred. Examples of the solvent include any inert solvent which does not disturb the reaction, such as ketones (e.g., acetone, methylethyl ketone, etc.), aromatic hydrocarbons (benzene, toluene, xylene, etc.), ethers (diethyl ether, diisopropyl ether, tetrahydrofuran, dioxane, 1,2-dimethoxyethane, etc.), amides (N, N-dimethylformamide, N,N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, etc.), nitriles (acetonitrile, etc.), alcohols (methanol, ethanol, propanol, 2-butanol, etc.), dimethylsulfoxide, pyridine, 2,6-luthidine, etc., and a mixed solvent comprising two or more of these solvents, if necessary. Above all, ketones such as acetone, methylethyl ketone, etc., and amides such as N,N-dimethylformamide, N,N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, etc. are preferred. The present reaction can be carried out in a wide range of temperature from a temperature of under cooling to under heating. Fcr example, the reaction can be preferably carried out at a temperature of under ice-cooling to the boiling point of zhe reaction mixture. An alkali metal iodide such as lithium iodide, sodium iodide, potassium iodide, etc. can also be added, which may facilitate the reaction. (3) The reaction for removing a protecting group from the compound [7] to give the compound [6] can be carried out by a method generally used for the deprotection of carboxyl group. (4) The reaction for condensing the compound [5] with the compound [6] to give the compound [4] can be carried out in a manner similar to that for reacting the compound [2] with the compound [3-A]. (5) The reaction for cyclizing the compound [4] to give the compound [2] can be carried out by treating the compound [4] with a base in an appropriate solvent. Examples of the base usable include both the inorganic and organic bases such as alkali metal carbonates (sodium carbonate, potassium carbonate, etc.), alkali metal hydroxides (sodium hydroxide, potassium hydroxide, lithium hydroxide, etc.), alkali metal hydrides (sodium hydride, etc.), alkali metal alkoxides (sodium methoxide, potassium t-butoxide, etc.), tri-lower alkylamines (triethylamine, tributylamine, diisopropylethylamine, etc.), tert-amines (1,4-diazabicyclo[2.2.2]octane, 1, 5-diazabicyclo[4.3.0] -non-5-ene, 1,8-diazabicyclo[5.4.0]undec-7-ene, etc.), amines (N,N-dimethylaniline, N,N-diethylaniline, 4-dimethylaminopyridine, etc.), pyridine, lutidine, collidine, etc. Above all, alkali metal carbonate, alkali metal alkoxides, diisopropylethylamine, pyridine, etc. are preferred. The present reaction can be carried out in the presence or absence of a solvent, preferably in the presence of a solvent. Examples of the solvent include any inert solvent which does not disturb the reaction, such as aromatic hydrocarbons (benzene, toluene, xylene, etc.), ethers (diethyl ether, diisopropyl ether, tetrahydrofuran, dioxane, 1,2-dimethoxyethane, etc.), amides (N,N-dimethylformamide, N,N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, etc.), nitriles (acetonitrile, etc.), alcohols (methanol, ethanol, propanol, 2-butanol, etc.), dimethylsulfoxide, pyridine, 2, 6-luthidine, etc., and a mixed solvent comprising two or more of these solvents, if necessary. Above all, xylene, tetrahydrofuran, N,N-dimethylformamide, N, N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, methanol, pyridine, etc. are preferred, and N,N-dimethylacetamide and 1,3-dimethyl-2-imidazolidinone are especially preferred. The present reaction can be carried out in a wide range of temperature from a temperature of under cooling to under heating, preferably at a temperature of under ice-cooling to the boiling point of the reaction mixture. (6) The reaction between the compound [9] and the compound [12] to give the compound [4] can be carried out in the presence of a base in an appropriate solvent, if necessary. The leaving group in the compound [12] can be preferably, for example, a halogen atom. Examples of the base usable in the present reaction include the inorganic and organic bases. The inorganic bases include alkali metal carbonates (sodium carbonate, potassium carbonate, etc.), alkali metal hydrogen carbonates (sodium hydrogen carbonate, potassium hydrogen carbonate, etc.), alkali metal hydroxides (sodium hydroxide, potassium hydroxide, lithium hydroxide, etc.), alkali metal hydrides (sodium hydride, etc.). A mixture of cesium carbonate and sodium iodide can also be used. The organic bases include alkali metal alkoxides (sodium methoxide, potassium t-butoxide, etc.), tri-lower alkylamines (triethylamine, tributylamine, diisopropylethylamine, etc.), tert-amines (1,4-diazabicyclo[2.2.2]octane, 1,5-diazabicyclo[4.3.0]non-5-ene, 1,8-diazabicyclo[5.4.0]-undec-7-ene, etc.), amines (N,N-dimethylaniline, N,N-diethylaniline, 4-dimethylaminopyridine, etc.), pyridine, lutidine and collidine, etc. Above all, alkali metal carbonates, diisopropylethylamine, pyridine, etc. are preferred. In the present reaction, the bases above can also be used as a solvent. Examples of the solvent usable in the present reaction include any inert solvent which does not disturb the reaction, such as ketones (e.g., acetone, methylethyl ketone, etc.), aromatic hydrocarbons (benzene, toluene, xylene, etc.), ethers (diethyl ether, diisopropyl ether, tetrahydrofuran, dioxane, 1,2-dimethoxyethane, etc.), amides (N, N-dimethylformamide, N,N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, etc.), nitriles (acetonitrile, etc.), alcohols (methanol, ethanol, propanol, 2-butanol, etc.), dimethylsulfoxide, pyridine, 2, 6-luthidine, etc. A mixed solvent comprising two or more of these solvents can also be used. Above all, ketones and amides are preferred. The present reaction can generally be carried out at a temperature of under ice-cooling to the reflux temperature of the solvent. The reaction time for the present reaction is generally between 30 minutes and 24 hours; however, longer or shorter reaction time can be selected appropriately, if necessary. Further, an alkali metal iodide such as lithium iodide, sodium iodide, potassium iodide, etc. can also be added, which may facilitate the reaction. The reaction between the compound [13] and the compound [14] can be carried out in the presence of a base in an appropriate solvent, if necessary. The leaving group in the compound [13] can be preferably, for example, a halogen atom or a nitro group. Examples of the base usable in the present reaction include alkali metal carbonates (sodium carbonate, potassium carbonate, cesium carbonate, etc.), alkali metal hydrides (sodium hydride, etc.) and alkali metal alkoxides (sodium m.ethoxide, potassium t-butoxide, etc.). Above all, sodium hydride is preferred. Examples of the solvent usable in the present reaction include amides (N,N-dimethylformamide, N,N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, etc.) and ethers (diethyl ether, diisopropyl ether, tetrahydrofuran, dioxane, 1,2-dimethoxyethane, etc.), and N,N-dimethylformamide, N,N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, etc. are preferred. The reaction for formylation of the compound [11] to give the compound [10] can be carried out in a conventional manner, if necessary. For example, the reaction can be carried out by reacting a formylating agent in accordance with zhe method for Duff reaction, Gatterman-Koch reaction, Vilsmeier reaction, etc. in an appropriate solvent. Any conventional formylating agent can be used without limitation, and hexamethylenetetramine, etc. are preferred. Examples of the solvent include any inert solvent which does not disturb the reaction, such as organic acids (acetic acid, propionic acid, trifluoroacetic acid, methanesulfonic acid, etc.), halogenated hydrocarbons (chloroform, dichloromethane, dichloroethane, etc.) aromatic hydrocarbons (benzene, toluene, xylene, etc.) ethers (diethyl ether, diisopropyl ether, tetrahydrofuran dioxane, 1,2-dimethoxyethane, etc.), ketones (acetone methylethyl ketone, etc.), esters (ethyl acetate, etc.) amides (N,N-dimethylformamide, N,N-dimethylacetamide, 1,3-dimethyl-2-imidazolidinone, etc.), nitriles (acetonitrile, etc.), water, and a mixed solvent comprising two or more of these solvents, if necessary. It is preferred to select any appropriate solvent depending on the method used. The present reaction can be carried out in a wide range of temperature from a temperature of under cooling to under heating, preferably at -78 °C to the boiling point of the reaction mixture. The resulting compounds of the present invention thus produced can be isolated and purified by a procedure well known in the field of organic chemistry such as recrystallization, column chromatography, etc. The present compound [1] or a pharmaceutically acceptable salt thereof has an excellent inhibitory effect on activated blood coagulation factor X, and hence is useful in the prevention and treatment of various disorders caused by thrombi and emboli in a mammal (e.g., human, monkey, rabbit, dog, cat, pig, horse, bull, mouse, rat. guinea pig, etc.), which disorders include, for example, stable angina pectoris, unstable angina pectoris, cerebral thrombosis, cerebral infarction, cerebral embolism, transient ischemic attack (TIA), ischemic cerebrovascular disease such as cerebrovascular spasm after subarachnoid hemorrhage, ischemic heart disease caused by coronary artery thrombogenesis, congestive chronic heart failure, myocardial infarction, acute myocardial infarction, pulmonary infarction, pulmonary embolism, pulmonary vascular disorders, economy-class syndrome, kidney disease (diabetic renal disease, chronic glomerulonephritis, IgA nephropathy, etc.), thrombogenesis with atherosclerosis, peripheral arterial occlusion, peripheral venous occlusion, Buerger's disease, deep vein thrombosis, disseminated intravascular coagulation (DIG), thrombogenesis after implantation of a synthetic vascular prosthesis or replacement of artificial heart valve or joint, intermittent claudication, thrombogenesis and reocclusion after blood circulation reconstruction such as percutaneous transluminal coronary angioplasty (PTCA) or percutaneous transluminal coronary artery recanalization (PTCR) , systemic inflammatory response syndrome (SIRS), multiple organ failure (MODS), thrombogenesis in extracorporeal circulation, blood coagulation in case of blood drawing, diabetic circulatory disturbance, graft rejection, organ protection and improvement of function in case of transplantation, etc. The present compound is characterized in that it shows excellent inhibitory effect on activated blood coagulation factor X, decreased toxicity, and causes few side effects (bleeding, etc.) that are seen in the existing anticoagulants. When a FXa inhibitor has a small distribution volume (internal medicine/blood concentration), it would be substantially free of side effects such as phospholipidosis, hepatotoxicity, etc. Accordingly, FXa inhibitors, especially those having the distribution volume of 0.1-3.0 L/kg and the FXa inhibitory effect with the IC50 value of 100 nM or below are substantially free of side effects such as phospholipidosis, hepatotoxicity, etc., and useful as a medicament for treating thrombosis. For example, trans-5-dimethylaminocarbonyl-3-[4-(N-formyl-N-methylamino)-cyclohexylcarbonylamino]-N-(5-chloropyridin-2-yl)-benzofuran-2-carboxamide has the distribution volume of 0.8 L/kg and the FXa inhibitory effect with the IC50 value of less than 100 nM, and can be an excellent medicine being substantially free of side effects such as phospholipidosis, hepatotoxicity, etc. FXa inhibitors having small distribution volume have preferably the following partial structure: and more preferably the following partial structure: The present compound (1) or a pharmaceutically acceptable salt thereof can be formulated into a pharmaceutical composition comprising a therapeutically effective amount of the compound (1) and a pharmaceutically acceptable carrier therefor. The pharmaceutically acceptable carriers include diluents, binders (e.g., syrup, gum arable, gelatine, sorbit, tragacanth, polyvinylpyrrolidone), excipients(e.g.,lactose, sucrose, corn starch, potassium phosphate, sorbit, glycine), lubricants (e.g., magnesium stearate, talc, polyethylene glycol, silica), disintegrants (e.g., potato starch) and wetting agents (e.g., sodium lauryl sulfate), etc. The compound [1] of the present invention or a pharmaceutically acceptable salt thereof can be administered orally or parenterally, and be used as an appropriate pharmaceutical preparation. Examples of an appropriate preparation for oral administration include solid preparations (tablets, granules, capsules, powders, etc.), solutions, suspensions and emulsions. Examples of an appropriate preparation for parenteral administration include suppository, injections or preparation for continuous infusion prepared using distilled water for injection, physiological saline or aqueous glucose solution, etc., or inhalant. The dose of the compound [1] or a pharmaceutically acceptable salt thereof of the present invention may vary depending on the administration routes, and the age, weight and condition of the patient, or the kind or severity of the disease, it is usually in the range of about 0.1 to 50 mg/kg/day, preferably about 0.1 to 30 mg/kg/day. EXAMPLES The present invention will be illustrated in detail by Examples and Reference Examples, but should not be construed to be limited thereto. Example 1: Trans-5-methoxycarbonyl-3-[4-(2-oxopyrrolidin-l- yl)cyclohexylcarbonylamino]-N-(5-chloropyridin-2-yl)- benzofuran-2-carboxamide Trans-4-(2-oxopyrrolidin-l-yl)cyclohexanecarboxylic acid (634 mg) obtained in Reference Example 113 is dissolved in thionyl chloride (10 ml), and the mixture stirred at room temperature for 4 hours. The reaction solution is concentrated under reduced pressure, and the residue is dissolved in chloroform (5 ml). The mixture is added dropwise into a suspension of 3-amino-5-methoxy-carbonyl-N- (5-chloropyridin-2-yl)benzofuran-2-carboxamide (691 mg) obtained in Reference Example 72 in pyridine (15 ml) under ice-cooling. After the addition, the reaction solution is warmed to room temperature, and then stirred for 17 hours. To the reaction solution is poured a saturated aqueous sodium hydrogen carbonate solution, and the mixture is extracted with chloroform. The organic layer is washed with a saturated brine, dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: chloroform) to give the title compound (7B5 mg). APCI-MS M/Z: 539/541 [M+H] Example 2: Trans-3-[4- (N-acetyl-N-methylaraino) cyclohexyl-carbonylamino] -5-rriethoxycarbonylmethyl-N- (5-chloropyridin-2-yllbenzofuran-2-carboxamide Trans-4-(N-acetyl-N-methylamino)cyclohexanecarboxylic acid (1.80 g) obtained in Reference Example 114 is dissolved in thionyl chloride (20 ml), and the mixture is stirred at room temperature for 12 hours. The reaction solution is concentrated under reduced pressure, and the residue is dissolved in chloroform (70 ml), and thereto is added 3-amino-5-methoxycarbonylmethyl-N- {5-chloropyridin-2-yl)benzofuran-2-carboxamide (2.20 g) obtained in Reference Example 13 under ice-cooling. To the mixture is further added pyridine (4.95 ml), and the reaction solution is warmed to room temperature, and stirred for 3 hours. To the reaction solution is poured a saturated aqueous sodium hydrogen carbonate solution, and the mixture is extracted with chloroform. The organic layer is washed successively with water and a saturated brine, dried over sodium sulfate. and the solvent is evaporated under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: n-hexane/ethyl acetate = 1/1, then ethyl acetate only) to give the title compound (2.97 g). APCI-MS M/Z: 541/543 [M+Hl* Example 3: 3-[2-{l-Isopropylpiperidin-4-yl)acetylamino]-N-{5-chloropyridin-2-yl)ben2ofuran-2-carboxamide dihydrochloride [l-Isopropylpiperidin-4-yl)acetic acid hydrochloride (432 mg) obtained in Reference Example 129 is dissolved in thionyl chloride (5 ml), and the mixture is stirred at room temperature for 3 hours. The thionyl chloride is evaporated under reduced pressure, and the resulting residue is dissolved in dichloromethane (10 ml), and cooled with ice. To this solution are added 3-amino-l-(5-chloro- pyridin-2-yl)benzofuran-2-carboxamide (374 mg) obtained in Reference Example T4 and pyridine (420 pi), and the reaction solution is warmed to room temperature, and stirred for 3 hours. To the reaction solution was added water and a saturated aqueous sodium hydrogen carbonate solution, and the mixture is extracted with ethyl acetate. The organic layer is washed with water and a saturated brine, dried over sodium sulfate, and the solvent was i. evaporated under reduced pressure. The resulting residue is purified by silica gel column chromatography (eluent: chloroform, then chloroform/ methanol = 10/1, further 6/1) to give 3-[2-(l-isopropylpiperidin-4-yl)acetylamino]-N-(5-chloropyridin-2-yi)benzofuran-2-carboxamide (489 mg), which is further dissolved in dichloromethane (10 ml), and thereto is added 4N hydrogen chloride in dioxane (5 ml), and the mixture is stirred at room temperature for 30 minutes. The reaction solution is concentrated under reduced pressure, and the resulting residue is suspended in methanol-chloroform. The precipitates are collected by filtration to give the title compound (423 mg). APCI-MS M/S: 455/457 [M+H]* Examples 4-75 The corresponding amino compounds and carboxylic acid compounds are treated in a similar manner to Example 1, Example 2 or Example 3 to give the following compounds in a free form, which are further treated with hydrogen chloride to give hydrochlorides thereof. 3-Amino-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide (201 mg) obtained in Reference Example 74 is dissolved in N,N-dimethylforniamide (6 ml) , and thereto are successively added (l-isopropylpiperidin-4-yl)carboxylic acid hydrochloride (199 mg) obtained in Reference Example 130, 4-dimethylair;inopyridine (137 mg) and l-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (203 mg), and the mix-rure is stirred at 63°C for 4 hours. The reaction solutior. is diluted wi"h ethyl acetate, and water and a saturated acueous sodium hydrogen carbonate solution are poured thereto, and the mixture is extracted with echyl acetate. The organic layer is washed with water and a saturated brine, dried over sodium sulfate, and charged onto NH-silica gel pad. The solvent is evaporated under reduced pressure, and the resulting residue is purified recycled HPLC and suspended in diethyl ether/n-hexane. The precipitates are collected by filtration to give the title compound {114 mg). APCI-MS M/Z: 441 [M+H]* Example 77: Trans-5-carboxy-3-[4-{2-oxopyrrolidin-l-yl)-cyclohexylcarbonylamino] -N-(5-chloropyridin-2-yl)benzo- cyclohexylcarbonylamino] -N-(5-chloropyridin-2-yl)benzo-furan-2-carboxainide (710 mg) obtained in Example 1 is suspended in tetrahydrofuran-methanol (1:1, 10 ml), and thereto is added 4N aqueous sodium hydroxide solution (2 ml) under ice-cooling. The mixture is warmed to room temperature, and stirred for 18 hours. The reaction solution is concentrated under reduced pressure, and thereto is poured ice-water, and the mixture is neutralized with 10 % hydrochloric acid. The precipitates are collected by filtration, washed with water, and dried to give the title compound (655 mg;. ESI-MS M/Z: 523/525 [M-Hj" Examples 78-86 The corresponding carboxylic acid esters are treated in a similar manner to Example 77 to give the following N,N-dimethylformamide-pyridine (1:1, 30 ml), and thereto are added successively raorpholine (196 mg) , 1-hydroxybenzotriazole (406 mg) and l-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (576 mg} under ice-cooling, and the mixture is stirred at room temperature for 17 hours. To the reaction solution are poured ice-water and a saturated aqueous sodium hydrogen carbonate solution, and the mixture is extracted with ethyl acetate, washed with water and a saturated brine, and dried over sodium sulfate. The solvent is evaporated under reduced pressure, and the resulting residue is purified by NH-silica gel column chromatography (eluent: chloroform). The resulting residue is suspended in ethyl acetate-n-hexane, and the precipitates are collected by filtration, and dried to give the title compound (805 mg) . APCI-M3 M/Z: 594/596 [M+H] Examples 88-143 The corresponding compounds are treated in a similar manner to Example 87 lo give the following compounds in a free form, which are further treated with hydrogen chloride carboxamide (220 mg) obtained in Example 78 is suspended in pyridine (3 ml), and thereto are added successively 2-bromoethylammonium bromide (12 5 mg) , 1. OM 1-hydroxy-benzotriazole-N, K-dimethylf or—amide solution (600 ]il) and l-ethyl-3- (3-dimethylaminopropyl)carbodiimide hydrochloride (115 mg> under ice-ccoling, and the mixture is stirred at room temperature for 2.5 days. To the reaction solution are poured ice-w=ter ar.d a saturated aqueous sodium hydrogen carbonate sclu'cion, and the mixture is extracted with chloroform, dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: chloroform, then chloroform/ethyl acetate = 4/1), and the resulting residue is suspended in diisopropyl ether. The precipitates are collected by filtration, and dried to give the title compound (117 mg). APCI-MS M/Z: 510/512 [M+K] Example 145: Trans-3- [4- (>]-acetyl-N-ir,ethylamino) cyclohexyl-carbonylamino]-5-(2-hydroxyethyl)-N-(5-chloropyridin-2-yl)- carbonylamino]-5-methoxycarbonylmethyl-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide (2.95 g) obtained in Example 2 is suspended in tetrahydrofuran (65 ml), and thereto is added lithium bcrohydride (238 mg), and the mixture is stirred at room .emperature for 12 hours. To the reaction solution is poured IC % hydrochloric acid under ice-cooling, and the mixture is stirred at room temperature for 15 minutes. Subsequently, the reaction solution is neutralized with a saturated aqueous sodium hydrogen carbonate soluticri, and ex"racked with ethyl acetate. The organic layer is WB.sheci with a saturated brine, dried over sodium sulfate, and ths solvent is evaporated under reduced pressure. The resulting residue is purified by NK-silica gel column chromatography (eluent: ethyl acetate, then chlorcform/methanol = 40/1), and the resulting residue is suspended in diethyl ether. The precipitates are collected by filtration to give the title compound (2.24 g) . stirred for 0.5 hoar. A saturated aqueous sodium hydrogen carbonate solution is further poured thereto, and the iTiixture is extracted with chloroform. The organic layer is washed with a saturated aqueous sodiurr. hydrogen carbonate solution and a saturated brine, dried ever sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by NH-siiica gel column chrom.atography ieiuent: chlorofcrm, then chloroform/ methanol - 200/1) to give trans-3-[4-(dimethylamino) cyclohexylcarbonylaminoj-5-hydroxymethyl-N-{5-chloro-pyridin-2-yl)benzofur=n-2-carboxamide (46 mg). This product is dissolved in chloroform (1 ml), and thereto is added 2fl hydrogen chloride in methanol (0.1 ml), and the reaction solution is concentrated under reduced pressure. The resulting residue is suspended in ethyl acetate-methanol, and the precipitates are collected by filtration. benzofuran-2-carboxsirLide (21 mg, obtained in Example 153 is suspended in 4N r.ydrogen chloride in dioxane (8 rr.l) , and the mixture is stirred at roon -emperaiure for 28 hours. The reaction sclu-icr. is diluted with diethyl ether, and the precipitates are collected cy filrration, washed dissolved in 6N hydrochloric acid (40 ml), and the mixture is stirred at room temperature for 2 hours. To the reaction solution is added isopropanol (100 ml), and the precipitated solid is collected by filtration, washed with isopropanol and diethyl ether, and dried under reduced pressure to give the title compound (1.86 g). APCI-MS M/Z: 515/517 [M+H] Examples 158-179 Tran5-5-carboxymethyioxy-3-[4-(dimerhylamino)cyclo-hexylcarbonylamino]-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide hydrochloride obtained in Example 157 and the corresponding starting compounds are treated in a similar manner to Example 3 7 to give the following compounds in a free form, or whirh are further treated with hydrogen chloride to give hydrochlorides thereof. (100 ml), and thereto are added tin(II> chloride (anhydrous) (7.C2 g) and water (1.0 ml). The mixture is heated under reflux for 7 hours, and allowed to stand for cooling. To the reaction solution are added 10 % aqueous sodium hydroxide solution (30 ml) and tetrahydrofuran (200 m.l), and the mix.ure is stirred at room temperature for one hour. The insoluble materials are filtered on celite, and the filtrate is concentrated under reduced pressure, and purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate = 1/1, then chloroform/ethyl acetate = 1/1). The resulting residue is suspended in ethyl acetate/n-hexane, and the precipitates are collected by filtration and dried to give trans-5-amino-3-[4-(dimethyl-amino)cyclohexylcarbonylamino]-N-(5-chloropyridin-2-yl)-benzofuran-2-carboxamide (1.43 g). This product (35 mg) is dissolved in ethanol, and treated with 4N hydrogen chloride/ethyl ace-ats to give che title compound (4 3 mg). 22 is added 30 % hydrogen bromide in acetic acid {2 ml) , and the mixture is stirred at room temperature for 2 hours. To the reaction solution is added diethyl ether (20 mi), and the precipitates are collected by filtration, and suspended in a saturated aqueous sodium hydrogen carbonate solution, and extracted with ethyl acetate. The organic layer is washed with a saturated brine, dried over sodium sulfate, and the solvent is evaporated under reduced pressure to give urans-3-[4-[dimethylamino)cyclohexyl-carbonylamino] -5-raethylamino-N- (5-chlorQpyridin-2-yI) benzo-furan-2-carboxamide. Subsequently, this product is dissolved in ethanol, and treated with 4N hydrogen chloride in ethyl acetate to give the title compound (88 mg) . Example 36 is dissolved in dioxane (5 ml), and thereto is added 4N hydrogsr, chloride in dioxane (10 ml) , and the mixture stirred at room temperature for 5 hours. The reaction solution is concentrated under reduced pressure, and the resultirng residue is suspended in diethyl ether. The precipitates are collected by filtration, and dried to give the title compound (301 mg) . flPCI-MS M/Z: 514/516 [M+H] Example 183; Trans'5-(2-aminoxyethoxy)-3-[4-(2-oxo-pyrrolidine-1-ylj cyclohexylcarbonylamino]-N-(5-chloro-pyridin-2-yl)benzofuran-2-carboxamide dihydrochloride successively methoxyacetic acid (23 mg), 1-hydroxybenzo-triazole (39 mg) and l-ethyl-3~(3-dimethylaminopropyl)-carbodiimide hydrochloride (55 mg) under ice-cooling, and the mixture is stirred at room temperature for 17 hours. To the reaction solution is poured a saturated aqueous sodium hydrogen carbonate solution, and the mixture is extracted with chloroform. The organic layer is washed with a saturated brine, and dried over sodium sulfate. The solvent is evaporated under reduced pressure, and the resulting residue is purified by NH-silica gel column chloride ir. ethyl acetate to give the title compound (64 mg) . APCI-M3 M/Z; 525/530 [k'tH] Examples 1S5-1SS Trar.-5-amino-3- [4- (dimethylamino) cyclohexylcarbonyl-amino] -K- ( 5-chlcropyridin-2-yl} ber.zofuran-2-carboxamide obtained in Exa-ple 180 and the corresponding starting compounds are treated in a similar manner to Example 184 to (100 mg) obtained in Example 180 is dissolved in dichloromethane [8 ml), and thereto are added acetoxy acetylchloride 136 mg) and pyridine (36 l) under ice-cooling, and the mixture is stirred at room temperature for 17 hours. To the reaction solution is poured a saturated aqueous sodium hydrogen carbonate solution, and the mixture is extracted with chloroform. The organic layer is washed with a saturated brine, dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified ry NH-silica gel column chromatography 'eluent: chloroform, zhen chloroform/ methanol = 50/1; to give trans-o-acetoxyacetylam.inO'B-[4-(dimethyl amino} eye lohexylcarbcr.ylamino] -N- ( 5-chloropyridi-2-yl) benzof uran-2-C5rbcxamide 110 mg). A portion of "his produce is dissclved in ethanol, and treated with 4N hydrogen chloride ir. e"hyl acetace to give -he "itle compound (16 mg). APCI-MS M/Z: 556/555 [MHj' Examples 19C-19c The correspcnding compounds are treated in a sim.ilar Trans-5-acetoxyacetylamino-3-[4-(dimethylamino)-cycloheKylcarbonylamino]-N-(5-chloropyridin-2-yl)benzo- furan-2-carboxamide (70 mg) obtained in Example 189 is dissolved in tetrahydrofuran/methanol (1:1, 8 ml), and thereto is added potassium carbonate (5 mg), and the mixture is stirred a-: room temperature for 48 hours. The reaction solution is concentrated under reduced pressure, and the resulting residue is purified by silica gel column chromatography ' eluen: cnloroform/methanol = 30/1) . The resulting trans-3-[4-(dimethylamino)cyclohexylcarbonyl- amino] -S-hydrcxyacietylamino-N- {5-chloropyridir.-2-yl) ~ benzofuran-2-carbox = :rdde is dissolved in ethanol, and treated with 4K hydrogen chloride in ethyl acetate to give the title compound ;46 mg). APCI'MS M/Z; 514 [M-Hj" mg) obtained in Examole 180 is suspended in dichlororaethane (3 ml), and thereto are added successively 35 % aqueous formaldehyde solution (82 pi) and sodium triacetoxy borohydride (70 mg) under ice-cooling. The reaction solution is warmed to room temperature, and stirred for 11.5 hours. To the reaction solution is poured a saturated aqueous sodium hydrogen carbonate solution under ice-cooling, and the mixture is extracted with dichloromethane. The organic layer is washed with a saturated brine, dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by NH-silica gel colu-n chromatography (eluent: ethyl acetate) to give trans-5-di~ethvlamino-3-[4~ (dimethylamino)cyclohexyl-carbonyl amino] -r- ( 5-o"nloropyridin-2-yl) ber.2ofur3n-2- cartaoxamide (44 -ig) . This product is suspended in methanol, and treated witr. 4N hydrogen chloride in ethyl acetate to give the ti~le compcur.d (45 rag). APCI-MS M/Z; Sz=/530 [M+H]' Examples 199-2CC Trans-5-ar".ir.o-3- [4- (dime~hylamino) cyclohexylcarbor.yl-amino] -N- (5-chlcropyridin-2-yl) benzof uran-2-carbcxaraide obtained in Example 180 and the corresponding starting 2N hydrochloric acid (5 ml), and the mixture is stirred at room temperature for 3 hours. The reaction solution is basifisd with a saturated aqueous sodium hydrogen carbonate solution and potassium carbonate, and extracted with chloroform. The organic layer is washed with a saturated brine, dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eiuent: methanol/ethyl acetate = 1/20 — methanol/ethyl acetate = 1/5} to give trans-3-[4-(dimethylamino)cyclohexyl-carbonylamino]-5-[2-hydroxy-l-hydroKymethylethoxy)-N-(5-chloropyridin-2-yl)ben2ofuran-2-carboxamide (162 mg). This product is dissolved in methanol, and thereto is added 4N hydrogen chloride in ethyl acetate (1 ml). The solvent is evaporated under reduced pressure, and the resulting residue is suspended in diethvi ether, and the precipitates are collected by filtration to give the title compound {141 mg) . APCI-M3 M/Z: 531/533 [M+H]' Example 202 : Trans-3- [4- (N-t-butoxycarbonyl-N-methylam.ino) - added pyridine (7.9 ml). To the mixture is added dropwise thionyl chloride ;1.04 ml) under ice-cooling, and the mixture is stirred ar room temperature for 3 hours. The reaction solution is concentrated, and to the resulting residue are added successively pyridine 180 ml), 3-arainc-5-methoxycarbonyl-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide (2.76 g) obtained in Reference Example 72, and 4-dimethylaminopyridine (195 mg) under ice-cooling. The reaction solution is warmed to room temperature, and stirred for 17 hours. To the reaction solution is poured a saturated aqueous sodium hydrogen carbonate solution, and the precipitates are collected by filtration, washed successively with water and diethyl ether, and dried to give the title compound (4,63 g) . APCI-HS M/Z: 5B5 [M-H] Hixample 203: Trar.5-3-14- (t-butoxycarbonylamino) cyclohexyl-carbonylamino]-X-(5-chloropyridin-2-yl)benzofuran-2-carboxaLide dissolved in dichlcromethane (50 ml), and thereto is added pyridine (4.22 r.l) , and the mixture is cooled with ice. To the mixture is added dropwise thionyl chloride (0.76 ml], and the mixture is srirred at room temperature for 5 hours. The reaction sciution is cooled again with ice, and thereto are added 3-amino-N-(5-chloropyridin-2-yl)benzofuran-2-carboxaraide (2.00 g) obtained in Reference Example 74 and dichlcromethane (20 ml), and the mixture is stirred at room temperature for 15 hours. To the reaction solution is poured water, and the mixture is extracted with chloroform. The organic layer is washed successively with water, 5 % aqueous citric acid solution, water, a saturated aqueous sodium hydrogen carbonate solution and a saturated brine, dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by silica gel column chromatography (eluent: chloroform) and suspended in die"hyl ether. The precipitates are collected by filtration to give the title compound (2.94 g). APCI-MS M/Z: 5-3/515 '.M+HT Examples 204-2:" The corresponding starting compounds are treated in a 202 is dissolved in dioxane {20 ml), and thereto is added 4H hydrogen chloride in dioxane (10 mi), and the mixture is stirred at rooin temperature for 48 hours. The reaction solution is diluted with die'iihyl ether, and the precipitates are collected by filtration, washed several times with diethyl ether and dried to give the title compound (4.02 gl. APCI-MS M/Z: 485/487 [M+H]* Example 219; Trans-3-(4-aminocyclohexylcarbonylamino)-N-(5-chloropyridin-2-yl)benzof uran-2-carboxamide dihydrochloride (15C ml), and tr.erezo is added 4N hydrogen chloride in dioxane ;150 ml) , The n-.ixture is stirred at room temperature for 12 hours, and concentrated under reduced pressure. The residue is crushed in diethyl ether, and ml), and thereto is added 2.6N hydrogen chloride in ethyl acetate (30 ml}, and the mixture is stirred at room temperature for 5 hours. The reaction solution is concentrated under reduced pressure, and to the resulting residue are added chloroform and an aqueous sodium hydrogen carbonate solution. The precipitates are collected by filtration to give the title compound (1.47 g) . APCI-MS M/Z: 413/415 [M+H]' Examples 221-233 The corresponding starting compounds are treated in a siiT.ilar manner zo Exam-ole 218, iLxample 219 or Example 220 to give the following compounds in a free form, or which are further treated with hydrogen chloride to give hydrochlorides thereof. thereto, and 'he rrix-ure is stirred at room temperature for 0.5 hour. The reaotion solution is cooled again with ice, and thereto is added trans-5-me"hoxyoarbonyl-3-[4- (methylamino)cyciohexylcarbcnylamino■-N-(S-chloropyridine-2-yl)benzofuran-2-carboxamid8 hydrochloride CI.50 g] obtained in Exainple 21S. The rr.ix-ure is warmed to room tempersture and siirred for 3 hours. To the reaction solution are poured ice-water and a saturated aqueous sodium hydrogen carbonate solution, and the m;ixture is extracted with chloroform. The extract is washed with a saturated brine, and dried over sodium sulfate. The solvent is evaporated under reduced pressure, and the added acetyl chloride (307 uD and triethylamine (1.60 ml) under ice-cooling. The mixture is warmed to room temperature, ar.d stirred for 2 hours. To the reaction solution is poured a saturated aqueous sodium hydrogen carbonate solution, and the mixture is extracted with chloroforrr., washed with water and a saturated brine, and dried over sodium sulfate. The solvent is evaporated under reduced pressure, and the resulting residue is purified by NH-silica gel coluiTin chromatography (eluent: chloroform) to give the title compound (1.51 g) . under ice-cooling, and the mixture is stirred at room temperature for 6 hours. The reaction solution is diluted with chloroform, washed successively with water, 5 % aqueous citric acid solution, a saturated aqueous sodium hydrogen carbonate solution and a saturated brine, and dried over sodium sulfate. The solvent is evaporated under reduced pressure, and the resulting residue is dissolved in ethyl acetate, and -reated with activated carbon. The resulting residue is recrystallized from ethyl acetate to give the title compound (3S mg;. APCI-MS M/Z: 441/443 [M+H]" Examples 241-245 The corresponding starting compounds are treated in a similar manner to Example 239 or Example 240 to give the following compounds in a free form., or which are further f carboxamide dihydrochloride (110 mg) obtained in Example 223 is suspended in N,N-dimethylformamide (5 ml), and thereto are added successively acetic acid (13.2 y.1) , 1- hydroxybenzotriazole (31 mg) , triethylamine {80 |J1) and 1- ethy1-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (44 mg), and the mixture is stirred at room temperature for 15 hours. To the reaction solution are added acetic acid (8.2 nl), 1-hydroxybenzotriazole (20 mg) , triethylamine (67 yl) and l-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (28 mgl , and the mixture is further stirred at room temperature for 20 hours. To the reaction solution is poured a saturated aqueous sodium hydrogen carbonate , solution, and the mixture is extracted with chloroform. The organic layer is washed with a saturated brine, dried over sodium sulface, and the solvent is evaporated under reduced pressure. The resulting residue is purified by NK- silica gel cclumn chromatography (eluent: n-hexane/ethyl acetare = 1/1, rhen etihyl acetate). The ob'iained solid is suspended in n-hexane/diisoprcpyl ether, and collected by filtration to give the title compound (42 mg). 228 is dissolved in N,N-dimethylformamide [3 ml), and thereto are added successively nicotinic acid (34 mg), 1-hydroxybenzotriazole (37 mg) and l~ethyl-3-(3-dimethyl-aminopropyl)carbodiimide hydrochloride (53 mg), and the mixture is stirred at room temperature for 4 hours. To the reaction solution are poured a saturated aqueous sodium hydrogen carbonate solution and water, and the precipitates are collected by filtration, washed with chloroform, and dried to give 3-[1-({pyridin-3-yl)carbonyl)piperidin-4-ylcarbonylamino;-K-{5-chloropyridin-2-yl)benzofuran-2-csrboKamice (1G3 mg) . This product is treated with hydrogen chloride in dioxane t; give rhe title compound (115 mg). APCI-KS M/'Z: 504/505 [M+H] * Examples 248-257 The corresponding starting compounds are treated in a similar rrianner to Example 246 or Example 247 to give the following compounds in a free form, or which are treated with hydrogen chloride to give hydrochlorides thereof. and thereto is added 4N aqueous sodium hydroxide solution (5 ml) under ice-cooling. The mixture is warmed to room temperature, and stirred for 17 hours. The reaction solution is concentrated under reduced pressure, and to the residue is poured ice-water, and the mixture is neutralized with 10 % hydrochloric acid. The precipitates are collected by filtration, washed successively with water and tetrahydrofuran, and dried to give the title compound (1.59 g)- ESI-MS M/Z: 497/499 [M-H]" Examples 259-260 The corresponding starting compounds are treated in a similar manner to Example 253 to give the following compounds in a free form, or which are treated with hydrogen chloride to give hydrochlorides thereof. hexylcarbonylamino] -K-{5-chloropyridin-2-yl)ben2ofuran-2-carboxamide (156 mg) obtained in Example 258 is suspended in N,N-diraethyifornamide/pyridine (1:1, 8 ml), and thereto are added successively dimetr.ylamine hydrochloride (49 mg) , l-hydroxyber.zotria::ole (1C8 ng) and l-ethyl-3-(3-dimethyl-aminopropy1)carbodiimide hydrochloride (15 3 mg) under ice- cooling, and the mixture is stirred at room temperature for 48 hours. To the reaction solution is poured a saturated aqueous sodium hydrogen carbonate solution, and the mixture is extracted with ethyl acetate. The extract is washed with water and a saturated brine, dried over sodium sulfate. The solvent is evaporated under reduced pressure, and the resulting residue is purified by NK-silica gel column chromatography (eluen~: ethyl acetate). The resulting residue is suspended in diethyl ether/n-hexane, and the precipitates are collected by filtration to give the title thereto are added 2-iodo-ethanol (105 \il) and sodium carbonate (57 mg) , and the mixture is stirred at 50°C for 15 hours. To the mixture is further added 2-iodo-ethanol (53 pi), and the mixture is further stirred at 80°C for 6 hours. Again, 2-iodo-ethanoI (53 y.1) is added thereto, and the mixture is stirred at 80°C for 24 hours. The reaction solution is concentrated under reduced pressure, and to the residue is poured a saturated aqueous sodium hydrogen carbonate solution, and rhe mixture is extracted with chloroform. The organic layer is washed with water, a saturated brine, dried over sodium sulfate, and the solvent is evaporared under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: n-hexane/ethyl acetate = 1/2, then ethyl acerate) to give trans-3~[4-(N- ( 2-hydroxyethyl) -N-methylaraino) cyclo-hexylcarbonylaiTiino] -N- ( 5-chloropyridin-2-yl) benzof uran-2-carboxaiTiide {53 mg} . Subsequently, this product is dissolved in chloroform/raethanol (5/1, 6 ml), and thereto is added 4N hydrogen chloride in ethyl acetate (1 ml). The solvent is evaporated under reduced pressure. The resulting residue is suspended in diethyl ether, and collected by filtration to give the title compound (55 mg). 2-yl)benzofuran-2-carboxamide (100 mg) obtained in Example 228 is suspended in N,N-dimethylacetamide (3 ml), and thereto are added 4-(chloromethyl)pyridine hydrochloride (45 mg) , sodiu.T- carbonate (80 mg) and sodium iodide (41 mg) , and the mdxture is stirred at room temperature for 12 hours. To the reaction solution is poured a saturated aqueous sodium hydrogen carbonate solution, and the mixture is extracted with ethyl acetate. The organic layer is v/ashed with water and a saturated brine, and dried over sodium sulfate. The solvent is evaporated under reduced pressure, and the resulting residue is purified by WH-silica gel column chromauography (eluent.: n-hexans/ethyl acetate = 2/1, then 1/1) to give the title compound (109 mg). APCI-HS [1/Z; 490/492 IM+HT Examples 280-289 The corresponding starting compounds are treated in a similar manner to Example 278 or Example 279 to give the following compounds in a free form, or which are further treated with hydrogen chloride to give hydrochlorides obtained in Example 225 is suspended in acetonitrile/ tnethanol {5/1, 6 r,l) , and thereto is added triethylamine (93 tl), and the mixture is stirred at room temperature for several minutes. The reaction solution is cooled with ice. and thereto is added 2-iodo-ethanol (29 pi), and the mixture is stirred at 50°C for 3 hours. 2-Iodo-ethanol (58 pi) is further added thereto, and the mixture is stirred at 50°C for 3 hours. Again, 2-iodo-ethanol (58 pi) is added thereto, and the mixture is further stirred at 50°C for 15 hours. The reaction solution is concentrated under reduced pressure, and LO the residue are poured water and a saturated aqueous sodium hydrogen carbonate solution, and the mixture is extracted with chloroform. The organic layer is washed with water and a saturated brine, dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: ethyl acetate, then ethyl acetate/methanol = 20/1) to give trans-3-[4-(2-hydroxyethylamino)cyclohexylcarbonylamino]-N-(4-chloro-phenyl) benzof uran-2-carboxamide (104 mg). This product (104 mg) is dissolved in chloroform/methanol [5/1, 5 ml), and thereto is added 4N hydrogen chloride in ethyl acetate (1 ml). The solvent is evaporated under reduced pressure, and the resulting residue is suspended in diethyl ether, and collected by filtration to give the title compound (95 mg) . APCI-MS M/2: 456/458 [M+H]* Examples 291-296 The corresponding starting compounds are treated in a similar manner to Example 290 to give the following compounds in a free form, or which are further treated with hydrogen chloride to give hydrochlorides thereof. mg) obtained in Example 219 is suspended in N,N-dimethyl acetamide (10 ml), and thereto are added bis(2-chloroethyl) ether (73 yl), sodium iodide (185 mg), and sodium carbonate (131 mg}, and the mixture is stirred at 500 for 5 hours, and then stirred at 80°C for 3 hours. Bis(2-chloroethyl) ether (73 pi) is further added thereto, and the mixture is stirred at 80°C for 15 hours. The reaction solution is concentrated under reduced pressure, and to the residue is poured a saturated aqueous sodium hydrogen carbonate solution, and the mixture is extracted with chloroform. The organic layer is washed with water and a saturated brine, dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: n-hexane/ethyl acetate = 5/1, then 1/1) to give trans-3-[4-(morpholin-4-yl)cyclohexylcarbonylamino]-N-(5-chloro-pyridin-2-yl)benzofuran-2-carboxamide (70 mg). Subsequently, this product is dissolved in chloroform/ methanol {5/1, 6 ml), and thereto is added 4N hydrogen chloride in ethyl acetate (1 ml), and the solvent is evaporated under reduced pressure. The resulting residue is suspended in diethyl ether, and collected by filtration to give the title compound (65 mg). APCI-MS M/Z: 483/485 [M+H]' Examples 298-301 furan-2-carboxamide (820 mg) obtained in Example 293 is treated in a similar manner to Example 156 to give the title compound (778 mg). ESI-MS M/Z: 507/509 [M+Na] Examples 303-305 Trans-3-[4-IN-carboxymethyl-N-methylamino)cyclohexyl-carbonylamino]-N~(5-chloropyridin-2-yl)benzofuran-2-carboxamide dihydrochloride obtained in Example 302 is treated in a similar manner to Example 87 to give the following compounds in a free form, or which are further treated with hydrogen chloride to give hydrochlorides thereof. (430 ml), and thereto is added triethylamine [7,99 ml) under ice-cooling, and the mixture is stirred for several minutes. Then, 35 % aqueous formaldehyde solution (7.59 ml) and sodium triacetoxy borohydride (12.10 g) are successively added thereto, and the reaction solution is warmed to room temperature, and stirred for 12 hours. To the reaction solution is poured a saturated aqueous sodium hydrogen carbonate solution under ice-cooling, and the mixture is extracted wich chloroform. The organic layer is washed successively with water and a saturated brine, dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The residue is purified by NH-silica gel column chromatography (eluenc: n-hexane/ethyl acetate = 3/1, then ethyl acetate) to give trans-3-[4-(dimethylamino)-cyclohexylcarbonylamino]-N-(5-chlQropyridin-2-yl)benzo-furan-2-carboxamide (6.92 g> . This product is dissolved in chloroform/methanol {5/1, 60 ml), and thereto is added 4N hydrogen chloride in ethyl acetate (50 ml) under ice-cooling. The reaction solution is concentrated under reduced pressure, and the resulting residue is suspended in diethyl ether, and collected by filtration to give the obtained in Example 221 is suspended in dichloromethane (8 ml), and thereto are added 3-t-butoxycarbonylaminopropanal (198 mg) and triethylamine (160 \il) under ice-cooling, and the mixture is stirred for several minutes. Then, sodium triacetoxy borohydride (243 mg) and t:he reaction solution is warmed to room temperature, and stirred for 4 hours. To the reaction solution is poured a saturated aqueous sodium hydrogen carbonate solution under ice-cooling, and the mixture is extracted with chloroform. The organic layer is washed successively with water and a saturated brine, dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: n-hexane/ethyl acetate = 3/1, then 1/1) to give the title compound (312 mg) . APCI-MS M/Z: 584/586 [M+H]+ Examples 308-326 The corresponding starting compounds are treated in a similar manner to Example 305 or Example 307 to give the following compounds in a free form, or which are further treated with hydrogen chloride to give hydrochlorides thereof. and sodium triacetoxy borohydride {18.0 g> under ice-cooling, and the reaction solution is warmed to room temperature and stirred for 6 hours. To the reaction solution is poured a saturated aqueous sodium hydrogen carbonate soluticr. under ice-cooling, and further rheretc is added potassium carbonate. The mixture is extraciied with chloroform, and the organic layer is washed with a saturated brine, dried over sodium sulfate, and the solvent is evaporated under reduced pressure to give crude 3-{dimethylaminc)prcpionaldehyde diethyl ace::al (5.31 g) . (2) 3-(Dimethylamino)propionaldehyde diethyl acetal {284 mg) obtained in Example 327-(1) is dissolved in tetrahydro-furan (3 ml), and thereto is added cone, hydrochloric acid (3 ml), and the mixture is stirred at room temperature for 15 hours. The reaction solution is concentrated to dryness under reduced pressure, and the resulting residue is dissolved in dichloromethane (7 ml}. Trans-3-[4-(merhyl-amino)cyclohexylcarbonylamino]-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide (150 mg) obtained in Example 221 and triethylarriine (226 yl) are added thereto, and the mixture is stirred for several minutes. Then, sodium triacetoxy borohydride (137 mg) is added thereto, and the reaction solution is warmed to room temperature, and stirred for 15 hours. To the reaction solution is added a saturated aqueous sodium hydrogen carbonate solution under ice-cooling, and the mixture is extracted with chloroform. The organic layer is washed successively with water and a saturated brine, dried over sodium sulfate, and the solvent is evaporared under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: ethyl aceare, then ethyl acetate/methanol = 20/1) to give trans'2-r4-[N-[3-(dimethylamino)propyl]-N-merhyl- amino!cyclohexylc = rbonylamino]-N- ; 5-chloropyridin-2-yI)benzofuran-2~c£rboxarrade (99 mg) . Subsequently, this product is dissolved in chicroform/methanol (5/1, 6 rr.l), and thereto is added 4H hydrogen chloride in ethyl acetate {1 ml), and t:he scivent is evaporated under reduced pressure. The resulting residue is suspended in diethyl ether, and collec-ed by filtration to give the title pyridin-2-yl)benzciuran-2-c2rboxamide dihydrochloride (125 mg) obtained in Example 219 is suspended in dichlororaethane (10 ml), and rhere'o is added triethylanine (102 pi) under ice-cooling, and zhe ir.ixture is stirred for several minutes. Then, about 25 * aqueous glutaraldehyde solution (150 rag) and sodium triaoeioxy borohydride (155 mg) are'added successively, and the mixture is stirred under ice-cooling for 2 hours. To the reaction solution is poured a saturated aqueous sodium hydrogen carbonate solution, and the mixture is extracted with chloroform. The organic layer is washed successively with water and a saturated brine, dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: n-hexane/ethyl acstate - 3/1, then 1/1) to give trans-3-['-(piperidin-1-yl)cyclohexylcarbonylamino]-N-(S-chloro-pyridin-2-yl)benzofuran-2-carboxamide {106 mg). Subsequently, this product is dissolved in chloroform/ methanol (5/1, 6 rr.l), and 4N hydrogen chloride in ethyl acetate (5 ml) is added thereto under ice-cooling. The reaction solution is concentrated under reduced pressure, and the resulting residue is suspended in diethyl ether, and collected by filtration to give the title compound (107 dissolved in chloroform (5 ml), and thereto is added acetyl chloride (24 yl). The mixture is stirred at room temperature for one hour, and thereto is poured a saturated aqueous sodium hydrogen carbonate solution, and the mixture is extracted with chloroform. The organic layer is washed successively with water and a saturated brine, dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate = 1/1, then ethyl acetate). The resulting residue is suspended in n-hexane, and collected by filtration'to give the title pyridin-2-yl)benzofuran-2-carboxamide dihydrochloride (150 mg) obtained in Example 219 is suspended in dichloromethane [5 ml), and thereto is added triethylamine (129 pi) under ice-cooiing, and the mixture is stirred for several minutes. Then, 15 % agueous succinic semialdehyde solution (290 \il) and sodium triaceroxy borohydride (131 mg) are successively added thereto, and under ice-cooling, the mixture is stirred for 0.5 hour. Then, l-hydroxybenzotriasole (63 mg), 1-ethyl-3-(3-dxme"hylaminopropyl)carbodiimide hydrochloride (118 mg) and N,N-dimethylformamide (3 ml) are successively added thereto, and the mixture is stirred at room temperature for 15 hours. The reaction solution is concentrated under reduced pressure, and thereto is poured chloroform. The mixture is washed successively with a saturated aqueous sodium hydrogen carbonate solution, water, and a saturated brine, dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: n-hexane/ethyl acetate = 1/1, then ethyl acetate), and the resulting residue is suspended in n-hexane, and collected by filtration to give the title amino] -5-methoxycarbonyl-N- C5-chloropyridine-2-yl) benzo- furan-2-carboxamide (540 mg) obtained in Example 209 is treated in a similar manner ~o Example 77 to give the title compound (475 mg). ESI-MS M/Z: 555/557 [M-H]" Example 337: Tran5-3-[4- (N-t-butoxycarbonyl-N-methylamino)- yl) benzofuran-2-carboxainide (3.52 g) obtained in Example 202 is treated in a similar manner to Example 11 to give the title compound (3.19 g). ESI-MS M/Z; 569/571 [M-H]" Examples 338-340 The corresponding starting compounds are treated in a similar manner to Example 87 to give the following compounds. Examples 341-344 The corresponding starting compounds are treated in a similar manner to Example 218 to give the following compounds in a free form, or which are further treated with hydrogen chloride to give hydrochlorides thereof. carboxamide hydrochloride (160 mg) obtained in Example 344 is suspended in dichloromethane (8 ml}, and thereto are added successively triethylamine (129 ]il), acetone [113 pi), and sodium triacetoxy borohydride (130 mg) under ice-cooling, and the reaction solution is warmed to room temperature, and stirred for 17 hours. Under ice-cooling, to the reaction solution is poured a saturated aqueous sodium hydrogen carbonate solution, and the mixture is extracted with chloroform. The organic layer is washed with a saturated brine, dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: ethyl acetate, then chloroform/ methanol = 30/1). The resulting residue is dissolved in ethanol, and thereto is added 4N hydrogen chloride in ethyl acetate. The reaction solution is concentrated and the resulting residue is suspended in diethyl ether. The precipitates are collected by filtration to give the title methoxycarbonyl-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide (690 mg) obtained in Example 311 is suspended in tetrahydrofuran/methanol (1:1, 10 ml}, and under ice-cooling, thereto is added 4N aqueous sodium hydroxide solution [3 ml). The mixture is warmed to room temperature, and stirred for 18 hours. The reaction solution is concentrated under reduced pressure, and poured into ice-water. The mixture is neutralized with 10 % hydrochloric acid, and the precipitates are collected by filtration, washed successively with water, tetrahydrofuxan, and diethyl ether, and dried to give the title compound (702 mg) . ESI-MS M/Z; 497/495 [M-H]" Examples 347-349 Trans-5-carbcKy-3-[4-(isopropylamino)cyclohexyl- carbonylamino]-N-(5-chloropyridln-2-yl)benzofuran-2-carboxamide obtained in Example 346 is treated in a similar manner to Example 87 to give the following compounds in a free form, or which are further treated with hydrogen chloride to give hydrochlorides thereof. Examples 350-354 The corresponding starting compounds are treated in a similar manner to Example 218 to give the following compounds in a free form, or which are further treated with hydrogen chloride to give hydrochlorides thereof. Examples 355-362 The corresponding starting compounds are treated in a similar manner to Example 239 or Example 246 to give the following compounds in a free form, or which are further treated with hydrogen chloride to give hydrochlorides thereof. Examples 363-364 The corresponding starting compounds are treated in a similar manner to Example 306 to give the following compounds in a free form, or which are further treated with hydrogen chloride to give hydrochlorides thereof. Examples 365-366 The corresponding starting compounds are treated in a similar manner to Example 201 ro give the following compounds in a free form, or which are further treated with hydrogen chloride ro give hydrochlorides thereof. in Example 308 is dissolved in dichloromethane [5 ml), and thereto is added methyl iodide (30 yl) , and the mixture is stirred at room temperature for 5 hours. To the reaction i solution is poured dichloromethane diethyl ether (1/5, 25 ml), and the precipitates are collected by filtration to give the title compound (125 mg). ESI-MS M/Z: 454/456 [K-i] Example 368: [4-[2-(5-Chloropyridin-2-ylcarbamoyI)benzo- furan-3-ylcarbamoyl]cyclohexyl]trimethylammonium iodide Trans-3-[4-(dimethylamino)cyclohexylcarbonylamino]-N-(5-chloropyridin-2-yl)benzofuran-2-carboxainide {150 mg) obtained in Example 306 and methyl iodide (21 ul} are treated in a similar manner to Example 367 to give the title compound (137 mg). ESI-MS M/Z: 455/457 [M-I]* Example 369: 3-[2-[l-(4, 5-Dihydroxazol-2-yl)piperidin-4-yl] acetylamino]-N- (5-chloropyridin-2-yl) benzofuran-2- 3- [2- [Piperidin-4-yl)acetylamino]-N-{5-chloropyridin-2-yl) ben2ofuran-2-carboxamide fl03 mg) obtained in Example 220 is suspended in tetrahydrofuran (5 ml), and thereto is ' added 2-bromoethyl isocyanats (27 \il) , and the mixture is stirred at room temperature for one hour. Triethylamine {280 ]il) is added thereto, and the mixture is further stirred at room temperature for 6 hours. To the reaction solution are poured water and ethyl acetate, and the precipitates are collected by filtration, washed with ethyl acetate, and dried to give the title compound (50 mg). APCI-MS M/2: 482/484 [M+H]* Examples 370-372 The correEponding starting compounds are treated in a similar manner to Example 369 to give the following compounds. I 2-yl)ben20furan-2-carboKamide (100 rag) obtained in Example 228 is suspended in 2-butanol (5 ml), and thereto are added 2-bromothiazole (113 pi) and N,N-diisopropylethylamine (131 pi), and the mixture is heated under reflux for 24 hours. To the reaction solution are added 2-bromothiazole (57 pi) and N,N-dimethylacetamide (2 ml), and the mixture is further heated under reflux for 24 hours. To the reaction solution is poured a saturated aqueous sodium hydrogen carbonate solution, and the mixture is extracted with chloroform. The organic layer is washed with water and a saturated brine, and dried over sodium sulfate. The solvent is evaporated under reduced pressure, and the resulting residue is purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate = 3/1, then ethyl acetate) to give 3-[[1-(2-thiazolyl)piperidin-4-yl]-carbonylamino]-N-(5-chloropyridin-2-yl)ben2ofuran-2-carboxamide (38 mq) . This product is further treated with hydrogen chloride in dioxane to give the title compound (25 mg) . APCI'MS M/Z: 482/484 [M+H]* Example 374 : Trar.s-3- [4- ( (pyriniidin-2-yl) amino) cyclo-hexylcarbonylamino] -N-[5-chloropyridin-2-yl)benzofuran-2- pyridin-2-yl> benzofuran-2-carboxamide dihydrochloride {350 mg) obtained in Example 219 and 2-chloropyrimidine (99 mg) are treated in a similar manner to Example 373 to give the mg) obtained in Example 219, tetrahydro-2,5-dimethoxyfuran (53 ul), sodium acetate (68 mg) are stirred at 80°C for 2 hours in acetic acid (3 ml) . To the mixture is added tetrahydro-2,5-dimethoxyfuran (26 ]il) , and the mixture is further stirred a:: 80°C for 2 hours. After cooling, the reaction solution is poured into ice-water, and the mixture is extracted with chloroform.. The organic layer is washed with a saturated aqueous sodium hydrogen carbonate solution, a saturated brine, and dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: ethyl acetate/hexane = 1/5 ethyl triphosgene (90 mg) are dissolved in dichloromethane (5 ml), and thereto is added pyridine (77 nl) with stirring under ice-cooling. The reaction solution is stirred at room temperature for 3 hours, and then cooled again with ice. To the mixture is added 3-amino-N-(5-chloropyridin-2-yl)-benzofuran-2-carboxanvide (250 mg) obtained in Reference Example 74, and the mixture is stirred for several minutes. Pyridine (105 \il) is added to the mixture, and the mixture is stirred at room temperature for 3 hours. The reaction solution is poured into water, and the mixture is extracted with chloroform. The organic layer is washed successively with 5% aqueous citric acid solution, water, a saturated aqueous sodium hydrogen carbonate solution and a saturated brine, dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: n-hexane/ethyl acetate = 10/1, then 5/1) to give the title compound {406 mg}. APCI-MS M/2: 515/517 [M-f-H] Example 377: Trans-3-[4-{t-butoxycarbonylamino> cyclohexyl- oxycarbonylamino]-N-(5-chloropyridin-2-yl)benzofuran-2- carboxamide 3-Amino-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide (500 mg) obtained in Reference Example 74 and t-butyl trans-(4-hydroxycyclohexyl}carbamate(37 5 mg) is treated in a similar manner to Example 37 6 to give the title compound (680 mg}. APCI-MS M/Z: 529/531 [M+H] Examples 378-379 The compound obtained in Example 376 or Example 377 is treated in a similar manner to Example 220 to give the following compounds. The compound obtained in Example 378 or Example 379 is treated in a simliar manner to Example 345 to give the following compounds in a free form, or which are further treated with hydrogen chloride to give hydrochlorides thereof. (!) l-Isopropylpiperidine-4-carboxylic acid hydrochloride (3.00 g} obtfiinec: in Reference Example 130 is suspended in toluene (180 ml), and thereto are added triethylamine (5.0 ml) and diphenylphophoryl azide (4.0 ml), and the mixture is heated at lOO'C for 2 hours. After cooling, to the reaction solution is added benzyl alcohol (4.5 ml) at room temperature, and *he mixture is heated under reflux for 4 hours. The reaction solution is concentrated under reduced pressure, and the resulting residue is diluted wirh ethyl acetate, and washed successively with a saturated aqueous sodium hydrogen carbonate solution, water and a saturated brine. The resultant is dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The residue is purified by NH-silica gel column chromatography (eluent: n-hexane/diethyl ether = 2/1, then n-hexane/ethyl acetate = 2/11 to give a crude product (6.32 g) containing benzyl (1-isoprDpylpiperidin-4-yl)carbamate. APCI-MS M/Z: 277 [M+H] (2) The crude product (6.32 g) containing benzyl (1-isopropylpiperidin-4-yl)carbamate obtained in Example 382-(1} is dissolved in ethanol (100 ml), and thereto is added 10 % palladium on carbon (600 mg), and the mixture is stirred at ambient temperature under hydrogen atmosphere overnight. The insoluble materials are removed by filtration, and the filtrate is concentrated under reduced pressure, and subjected to azeotropic distillation with toluene. The resulting residue is purified by NH-silica gel column chrcrr.acography (eluent: n-hey.ane/ethyl acetate = 1/1, then chlorcform/m.ethanol - 20/1, and further 10/1) to give 4-aminc-l'iscpropylpiperidine (1.90 g). The resulting :-amino-l-isopropylpiperidine is treated with 4N hydrogen chloride in dioxane to give 4-amino-l-isopropylpiperidine dihydrochloride. APCI-MS K/Z: 143 [M+H] (3) 4-7\mino-l-isopropylpiperidine dihydrochloride (112 mg) obtained in Example 382-(2) and triphosgene (54 mg) are suspended in dichloromethane (3 ml), and thereto is added pyridine (253 yl) with stirring under ice-cooling. The reaction solution is stirred at room temperature for 3 hours, and 3-amino~N-{5~chloropyridin-2-yl)ben2ofuran-2-carboxamide (150 mg) obtained in Reference Example T4 is added thereto, and the mixture is stirred at room temperature for 12 hours, then further heated under reflux for 15 hours. To the reaction solution are poured water and a saturated aqueous sodium hydrogen carbonate solution, and the mixture is extracted with chloroform. The organic layer is washed with a saturated brine, dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: n-hexane/ethyl acetate = 4/1, then 2/1) to give 3-[3-(l-isopropylpiperidin-4-yl)-ureido]-N-(5-chloropyridin-2~yl)benzofuran-2-carboxamide (112 mg). Subsequently, this product is treated with 4N hydrogen chloride in ethyl acetate {2 ml) to give the title compound [114 mg). APCI-MS M/Z: 456/458 [M+H] Example 383; Tran3-3-(4-methylhoraopipera2in-l-ylcarbonyl-amino)-N- (5-chloropyridin-2-yl)ben20furan-2-carboxamide dihydrochloride l-merhylhomopiperazine (8S \\1] are treaned in a similar manner to Example 382-(3) to give the title compound (110 mg) . APCI-KS M/Z: 428/430 [M+H]"" Example 384; Trans-3-[4-(2-oxopiperidin-l-yi)cyclohexyl-carbonylamino]-N-(5-chloropyridin-2-yl)benzofuran-2- pyridin-2-yl) penzofursn-2-cerboKamide dihydrochloride (3 00 mg) obtained in Example 219 is suspended in N,N~dimethyl-acetamide (5 ml), and thereto are added methyl 5-bromo-valerate (106 ul) , N, N"-diisopropylethylamine (537 \il) , and potassium iodide (111 -Tig), and the mixture is stirred at 100°C for 24 hours. -Methyl 5-bromovalerate (106 pi), N,N- dLisopropylehylamine (537 ul) and potassiurr. iodide (111 mg] are f'jrther added thereto, and the iriixture is stirred at lOOC for 12 hours. The reaction solution is diluted with ethyl acetate, and washed successively with a saturated aqueous sodium hydrogen carbonate solution, water, a saturated brine, and dried over sodium sulfate. The solvent is evapcrated under reduced pressure, and the resulting residue is purified by NH-silica gel coluran chromatography (eluent: n-hexane/ethyl acetate = 1/1, then ethyl acetate) to give trar.s-3-[4-(4-methoxycarbonylbutyl-anino)cyclohexylcarbonylamino]-N-(5-chloropyridin-2-yl)~ benzcfuran-2-carboxamide (101 mg). APCI-MS M/2: 527/529 [M-H]' (2) Trans-3-[4-(4-methoxycarbonylbutylamino)cyclohexyl¬carbonylamino] -N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide (95 rag) obtained in the above (1) is dissolved in tetrahydrofuran (3 ml), and thereto is added IN aqueous sodium hydroxide solution (216 pl), and the mixture is stirred at room temperature for 4 hours. To the mixture is added IN aqueous sodium hydroxide solution (684 |al), and the mixture is further stirred for 2 days. The reaction solution is concentrated to dryness under reduced pressure, and to the resulting residue are added N,N-dimethyl-formamide (3 ml), l-hydroxybenzotriazole (73 mg) and 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (104 mg). The mixture is stirred at room temperature for one day, and further thereto are added 1-hydroxybensotriazoie (73 m.g and l-ethyl-3-(3-dimethylaminoproryl)carbodiimide hydrochloride (104 mg), and the mixture is further stirred for one day. To the reaction soluticn is poured a saturated aqueous sodium hydrogen carbona.e solution, and the mixture is extracted with ethyl acetate. The organic layer is washed with water and a saturated brine, and dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by silica gel column chron-iaitography (eluent: ethyl acetate) to give the title compound (40 mg]. APCI-MS M/Z; 495/497 [M+H]' Example 385: Trans-5- (N-hydroxy> amidino-3-[4- (2-oxo- pyrrolidin-l~yl)cyclohexylcarbonylamino]-N-(5-chloro- carbonylamino]-N-{5-chloropyridin-2-yl)benzofuran-2' carboxamide (107 mg) obtained in Example 6 is suspended in dimethyl sulfoxide (2 ml) , and thereto are added hydroxy-ammonium chloride (36 mg} and a 28% sodium methoxide in methanol (100 \il) . The mixture is heated at 5Q°C for 2 hours, and further at 80°C for 2 hours. The reaction solution is poured into ice-water, and the precipitates are collected by filtration, and purified by recycle HPL-C to give the title compound (25 mg; APCI-MS M/Z: 539/541 [M+H]') and trans-5-dminocarbonyl-3-[4- (2-QKOpyrrolidin-l-yl) cyclohexylcarbonylamino 1 -N- (5-'Chloropyridin-2-'yl) benzo- formamide (3 ml), and thereto are added N,N-diisopropyl-ethylamine (38 \il) and N,N'-bis (t-butoxycarbonyl)-IH-pyrazole-1-carboxamidine(57 mg), and the mixture is stirred at room temperature for one day. The reaction solution is concentrated under reduced pressure, and the residue is poured into water, and extracted with chloroform. The organic layer is dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: n-hexane,'ethyl acetaze = 1/1, then ethyl acetate) to give "urans-S-- 2- [K, N ' -bis ; t-butoxycarbonyl) - guanidincxy]ethcxy}-3-[4-(2-oxopyrrolidin-l-yl)cyclo-hexylcarconylamino]-N-(5-chloropyridin-2-yl}benzofuran-2-carboxamide (32 mg). E3I-M3 M/Z: 920/S22 [H+Na]*, 798/800 [MH]' (2) To trans-5-(2-;K,N'-bis(t-butoxycarbonyl)guadinoxy]-ethoxy}-3-[4-(2-oxopyrrolidin-l-yl)cyclohexylcarbonyl-emino] -N- ( 5-chlc;ropyridin-2-yl) benzof uran-2-carboxamide (73 mg) obtained in the above (1) is added trifluoroacstic acid (2 ml) , and the mixture is stirred at room, temperature for 12 hours. The reac::ion solution is concentrated under reduced pressure, and the residue is neutralized with a saturated aqueous potassium carbonate solution, and extracted with chloroform. The organic layer is dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The residue is purified by NH-silica gel column chromatography (eluent: chloroform, then chloroform/ methanol = 97/3) to give trans-5-[2-(guanidinoxy)ethoxy]-3- [4-(2-oxopyrrolidin-l-yl)cyclohexylcarbonylamino]-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide (15 mg). Subsequently, this product (15 mg) is suspended in methanol (0.5 ml), and thereto is added 4N hydrogen chloride in dioxane (25 \il) . To the mixture is poured diethyl ether, and the precipitates are washed with diethyl ether, and dried to give the title compound (17 mg). ESI-MS M/Z: 598/600 [M+H]' Examples 387-351 carboxamide obtained in Example 77 and the corresponding starting compounds are treated in a similar manner to Example 87 to give the following compounds. carboxamide obtained in Example 258 and amino compounds are treated in a similar manner to Example 261 to give the following compounds in a free form, or which are further treated with hydrogen chloride to give hydrochlorides thereof. carboxamide dihydrochloride obtained in Example 343 and acid chloride corr.pounds are treated in a similar manner to Example 239 to give the following compounds. Example 400: Trans-5-dimetliylaminocarbonyl-3- [4- (N-hydroxy- acetyl-N-methylaraino)cyclohexylcarbonylamino]-N-(5-chloro- pyridin-2-yl)benzofuran-2-carboxamide carbonylamino] -D-dimethylaminocarbonyl-N- (5-Ghloropyriciir.-2-yl) ber.2ofuran-2-carboxanide (91 mg) ob-ained in Example 398 is dissclved in retrahydrofuran/methanol (2:3, 5 ml), and thereto is added at room temperature 2N aqueous sodium hydroKide sclution ;3G0 \A1) , and the mix-ture is stirred for 4 hours. The reaction soluzion is acidified with diluted hydrochloric acid, and the mixture is diluted with chlorofcrm. The mixture is dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by recycle HPLC to give the Examples 404-405 3-Amino-5-nitro-N- ( 5-criloropyridin-2-yl) benzof uran-2-carboxamide obrained in Reference Example 86 and a carboxylic acid are treated in a similar manner to Example carbonylamino]-N-{5-chloropyridin'2-yl)benzofuran-2-carboxair.ide (2.50 g) obtained in Example 404 is suspended in ethanol/tetrahydrofuran (1:1, 400 ml), and thereto is added Raney nickel, and the mixture is stirred at room temperature under atmospheric hydrogen pressure for 12 hours. To the resulting yellow suspension is poured chloroform (200 ml) , and the mixture is stirred at room temperature for 0.5 hour. The insoluble materials are removed by filtration, and the filtrate is concentrated under reduced pressure. The residue is purified by silica gel column chrorrLatography (eluent: chloroform to chlorof crm/me-'nancl = 4/1) , suspended in ethyl acstate/diethyl ether. The precipitates are collected by filtration, vashed with diethyl ether, and dried to give trar.s-5-aminG-3- [4- (2-oxcpyrrolidin-l-yl) cyclohexyl-carbonylamino] -;- (5-chioropyridLn-2-yI jbenzofuran-Z-carboxarriide (1.54 g). This product (150 mg) is suspended in methanol, and ths mixt'iire is treated with All hydrogen chloride in dioxane to give the title compound (156 mg). a similar manner to Example 406 to give trans-3-[4-{N-acetyl-N-methylamino)cyclohexylcarbonylamino]-5-amino-N-(5-chloropyridin-2-yl) benzofuran-2-carboxamide (1. 62 g) . The resulting free compound (150 mg) is suspended in methanol, and treated with 4N hydrogen chloride in dioxane to give the title compound (158 mg). APCI-MS M/Z: 484/486 [M+H] Examples 408-409 Trans-5-ami-o-3-[4-(2-cxopyrrcLidin-l-vl)cyclohexyl-carbonylamino] -N- ( 5-chlorop'.Tidir.-2~yl) benzof uran-2-carboxaTr;ide hydrochlcride cb::ained in Example 4 06 or trans-3- [4- (N-acetyl-K-methylamino) cyclohexylcarbonylamino] -5- amino-N- ;5-chlcr3pyriain-2-yl)benzofuran-2-carboxamide hydrochiorice oc- = ined in Example 407 is -created in a similar manner to Example 198 to give the fcllowing compouncs in a free form, or which are further treated with hydrogen chloride to give hydrochlorides thereof. in chloroforTL (3 ml), and thereto are added thionyl chloride {30 y.1) and a drop of N,N-dimethylformamide, and the mixture is s.irred at room temperature for 15 hours. To the resulting rescuicn solution is added 3-amino-5-dime-::hylamir.ocarbonyl-N- (5-chloropyridin-2-yl) benzofuran-2-carboxamide !96 mg) obtained in Reference Example 156 and pyridine (2 ml), and zhe mixture is stirred at room temperature :or 2 hours. To the reaction solution is poured a saturated aqueous sodium hydrogen carbonate solution, and the mixture is extracted with chloroform. The organic layer is dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: n-hexane/ethyl acetate - 2/1, then Example 152 and trans-4~{2-oxo-oxazolidin-3-yl)cyclohexane-carboxylic acid (432 mg) obtained in Reference Example 142 are treated in a similar manner to Example 1 to give the title compound (129 mg) . APCI-MS M/Z: 541/543 [M+H]* Example 419: Trans-4-carboxy-3-[4-{2-oxo-oxa2olidin-3-yl)-cyclohexylcarbor.ylamino] -N- (5-chloropyridin-2-yl)benzo-furan-2-carboxami.de furan-2-carboxarr.ide {107 mg) obtained in Example 418 is treated in a sirr-ilar manner to Example 77 to give the title compound (SO. 4 rr.g) . ESI-MS M/Z: 525/527 [M-H]" Example 4 20: Tr3ns-4-dimethylaminocarbonyl-3-[4-(2-oxo- oxazolidin-3-yl}cyclohexylcarbonylamino]-N-(5-chloro- pyridin-2-yl)ben2ofuran-2-carboxamide hexylcarbonylamino]-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide (50 mg) obtained in Example 419 is treated in a similar manner zo Example 87 to give the title compoiind (36.4 mg). APCI-M3 M/Z: 554/556 [M+H]"" Example 421: Tran3-4-methoxycarbonyl~3-'4-(2-oxopyrrolidin- Example 152 and trans-4-(2-oxopyrEolidin-l-yl)cyclohexane- carboxylic acid (2.06 g) obtained in Reference Example 142 are treated in a similar manner to Example 1 to give the title compound (1.90 g) . APCI-MS M/Z: 539/541 [M+H] Example 422: Tr£ns-4-carboxy-3-[4-(2-oxopyrrolidin-l-yl)- cyclohexylcarbonylamino]-N-(5-chloropyridin-2-yl)benzo- furan-2-carboxa-ide (880 mg) obtained in Example 421 is treated in a similar manner to Example 77 to give the title furan-2-carboxamici9 (350 mg) obtained in Example 421 is treated in a sir.ilar manner to Example 145 to give the title compound (40.9 mg). ESI-MS M/Z: 511/513[M+H]* Example 424: Trans-4-[N-(2-dimethylaminoethyl)-N-methyl]-aminocarbonyl-3-[4-(2-oxopyrrolidin-l-yl)cyclohexyl-carbonylamino]-N-{5-chloropyridin-2-yl)ben2ofuran-2-carboxamide dihydrochloride carbonylamino] -N- (5-chloropyriclir.-2~yl) benzof uran-2-carboxamide (70 mg) obtained in Example 422 is treated in a similar manner to Example 87 to give trans-4-[N-(2-dimethylaminoetr.yl) -K-methyl] aminocarbcnyl-3- [4- (2-oxo-pyrrolidin-1-yl)cyclohexylcarbonylamino]-N-(5-chloro-pyridin-2-ylfbenzofuran-2-carboxamide (40.7 mg). This product is dissolved in methanol, and treated with 4N hydrogen chloride in dicxane (50 pi) to give the title cor?.pound (35.7 rr,g) . APCI-MS M/Z: 609/611 [M+H]" Example 425: TranE-4-t-butoxycarbonylamino-3-[4-(2-oxo-pyrrolidin-1-yl)cyclohexylcarbonylamino]-N-(5-chloro-pyridin-2-yl } benzcfuran-2-carboxamide Trans-4-carboxy-3-[4-(2-oxopyrrolidin-l-yl)cyclohexyl-carbonylamino]-N-(5-chloropyridin-2-yl)benzofuran-2-carboxaraide (325 mg) obtained in Example 422 is dissolved in t-butanol (8 ml), and thereto are added at room temperature triethylamine (91 yil) and diphenylphosphoryl aside (140 pi), and the mixture is stirred at 60°C for 1.5 hour, and then heated under reflux for 5.5 hours. The reaction solution is diluted with a saturated aqueous sodium hydrogen carbonate solution, and extracted with chloroform. The organic layer is washed with a saturated brine, dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by silica gel column chromatography (eluent: chloroform/methanol = 100/1, ther. 10/1) to give nhe title compound (141.7 mg). SSI-MS M/Z: 596/598 [M+H] Example 42 6: Traa3-4-amino-3-[4- (2-oxopyrrolidin-l-yl)-cyclohexylcarbor.ylamino] -N- {5-chlcropyridin-2-yl> benzo-furan-2-carboxamide Trans-4-t-butoxycarbonylamino-3-[4-(2-oxopyrrolidin-l-yl)cyclohexylcarbonylamino]-N-C5-chloropyridin-2-yl)benzo-furan-2-carboxainide (108 mg) obtained in Example 425 is dissolved in trifluoroacetic acid (2 ml), and the mixture is stirred at room temperature for 2 hours. The reaction solution is concentrated under reduced pressure, and the resulting residue is neutralized with a saturated aqueous sodium hydrogen carbonate solution, and extracted with chloroform. The organic layer is dried over sodium sulfate, and the solver.t is evaporated under reduced pressure. The resulting residue is ourified by NH-silica gel column chromatography ■eluent: n-hexane/ethyl acetate = 1/1, then e-hyl acetate) -o give the ti"le compound (85.4 mg). SSI-MS M/Z: 496/498 [M+H] Example 4 27: Trans-4-dimethylamino-3-[4-{2-oxopyrrolidin-l-yl)cyclohexylcarbonylamino]-K-{5-chloropyridin-2~yl)benzo- Trans-4-aR:inc-3- [4- {2-oxopyrrolidin-l-yl) cyclohexyl¬carbonylamino] -N- (5-chloropyridin-2-yl) benzof urar.-2-carboxamide (41.7 mg) obtained in Example 426 is treated in a similar manner to Example 198 to give the title compound {8.0 mg). APCI-MS M/Z: 524/526 [M+H] Example 428: Trans-4-methanesulfonylamino-3-[4-{2-oxo¬pyrrolidin-l-yl ) cyclohexylcarbonylamino]-N-(5-chloro-pyridin-2-yl)benzofuran-2-carboxamide Trans-4-amino-3-[4-(2-cxopyrrolidin-l-yl> cyclohexyl¬carbonylamino] -K- {5-chloropyridin-2-yl)benzofuran-2-carboxamide (2 7 mg} obtained in Example 42 6 is dissolved in pyridine (2 ml), and thereto is added methanesulfonyl chloride (7 pi) under ice-cooling. The mixture is stirred at room temperazure overnight, and thereto are further added pyridine (3 ml) and methanesulfonyl chloride (500 ul) under ice-cooling. The mixture is stirred at room temperature for 6 hours. Water is added to the reaction solution, and the mixture is extracted with chloroform. The solvent: is evaporated under reduced pressure, and the resulting residue is purified by silica gel column chromatography (eluenf. chloroform, then chloroform/ methanol = 9/1) to give the title compound (21.2 mg), APCI-MS M/Z: 514/576 [M+H]* Example 429: Trans-3-L4-(3-oxo-morpholin-4-yl> cyclohexyl-carbcnylamino]-N-(5-chloropyridin-2-yl)benzofuran-2- 3-Amino-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide (66 mg) obtained in Reference Example 7 4 and trans-4-[3-oxo-morpholin-4-yl)cyclohexanecarboxylic acid (68 mg) obtained in Reference Example 141 are treated in a similar manner to Example 410 to give the title compound (74 mg). APCI-MS M/Z: 497/499 [MH]"" Reference Examole 1: Methyl 3-formyl-4-hydroxyben2oate hexamethylenetetramine (700 mg) and the mixture is heated under reflux for 2 hours. The reaction solution is concentrated under reduced pressure, thereto is poured ice-water, and then the mixture is extracted with ethyl acetate. The organic layer is washed with saturated aqueous sodium hydrogen carbonate solution and saturated brine, dried over sodium sulfate and the solvent is evaporated under reduced pressure. The resulting residue is dissolved in chloroform, and then filtered to remove the insoluble materials. The filtrate is concentrated under reduced pressure, and then purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate = 4/1} to give the title compound {540 mg) . ESI-MS M/Z:179[M-H]". Reference Example 2: Methyl (3'formyl-4-hydroxyphenyl)-acetate Methyl (4-hydroxyphenyl)acetate {1.66 g) is dissolved in trifluoroacetic acid (20 ml), thereto is added hexamethylenetetramine {700 mg) and the mixture is heated under reflux for 2 hours. The reaction solution is concentrated under reduced pressure, thereto is poured ice-water, and then the mixture is extracted with ethyl acetate. The organic layer is washed with saturated aqueous sodium hydrogen carbonate solution and saturated brine, dried over sodium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate = 9/1 followed by 4/1) to give the title compound (1.08 g) . ESI-MS M/Z:193[M-K]". Reference Examples 3-4 The corresponding compounds are treated in a similar manner to Reference Example 1 or Reference Example 2 to give the following compounds. Methyl 3-formyl-4-hydroxybenzoate (28.60 g} obtained in Reference Example 1 is dissolved in formic acid [120 ml], thereto is added hydroxylaTmnonium chloride (14.30 g) and the mixture is heated under reflux for 15 hours. The reaction solution is concentrated under reduced pressure, diluted with ethyl acetate, washed successively with water and saturated brine, dried over sodium sulfate and the solvent is evaporated under reduced pressure to give the title compound (24.25 g> . ESI-MS M/Z;176[M-H]'. Reference Example 6: Methyl (3-cyano-4-hydroxyphenyl)- Methyl (3-formyl-4-hydroxyphenyl)acetate (1.05 g) obtained in Reference Example 2 is dissolved in formic acid (15 ml), and thereto are added hydroxylammonium chloride (0.49 g) and sodium formate (0.81 g) and the mixture is heated under reflux for 8 hours. The reaction solution is concentrated under reduced pressure, diluted with ethyl acetate, washed successively with water and saturated brine, dried over sodiijim sulfate ar.d the solvent is evaporated under reduced pressure to give the title compound [520 mg}. ESI-MS M/Z:190[M-H]", Reference Examples 7-19 The corresponding compounds are treated in a similar manner to Reference Example 5 or Reference Example 6 to give the following compounds. suspension of 2-amino-5-chloropyridine (128.6 g) and triethylamine (169 ml) in dichloromethane {1000 ml) under ice-cooling, and the reaction solution is warmed to room temperature, and stirred for 0.5 hours. The reaction solution is concentrated under reduced pressure, thereto is poured ice-water, and then the reaction mixture is extracted with ethyl acetate. The organic layer is washed with saturated brine, dried over sodium sulfate and treated with activated charcoal. After filtration to remove insoluble materials, the filtrate is concentrated under reduced pressure and the resulting residue is suspended in diisopropyl ether. The precipitates are collected by filtration, washed with diisopropyl ether and dried to give 2-chIoro-N-(5-chloropyridin-2-yl)acetamide (153.4 g). APCI-M3 M/Z:205/207[M+Hj*. (2) Methyl 3-cyano-4-hydroxybenzoate (500 mg) obtained in Reference Example 5 is dissolved in acetone (25 ml), thereto are added 2-chloro-N-(5-chloropyridin-2-yDacetamide (6S5 mg) obtained in Reference Example 20(1), potassium carbonate (546 mg) and sodium iodide (550 mg) and the mixture is heated under reflux for 2 hours. After allowing to cool, insoluble materials are removed by filtration and the insolubles are washed with acetone several times. The filtrate and the washing are combined and concentrated under reduced pressure, and then purified by silica gel column chromatography (eluent: chloroform followed by chloroform/ethyl acetate = 4/1). The resulting residue is suspended in diethyl ether, and then the precipitates are collected by filtration to give the title Methyl (3-cyano-4-hydroxyphenyl)acetate (500 mg) obtained in Reference Example 6 is dissolved in acetone (25 ml), thereto are added 2-chloro-N-(5-chloropyridin-2-yl)acetamide (640 mg) obtained in Reference Example 20(1), cesium carbonate (1.20 g) and sodium iodide (510 mg) and the mixture is heated under reflux for 5 hours. After allowing to cool, the insoluble materials are removed by filtration and rhe insoluble materials are washed with acetone several times. The filtrate and the washing are combined, concentrated under reduced pressure, to the residue is poured water and extracted with ethyl acetate. The organic layer is washed with saturated brine, dried over sodium sulfate and evaporated to remove solvent under reduced pressure. The resulting residue is purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate/chloroform = 3/1/1). The resulting residue is suspended in diethyl ether-n-hexane, and then the precipitates are collected by filtration to give the title Furthermore, potassium carbonate (141.6 g} is added, and then the reaction solution is heated under reflux for 2 hours. After allowing to cool, the insoluble materials are removed by filtration, and then the insoluble materials are washed with acetone several times. The filtrate and the washing are coriiined, concentrated under reduced pressure and traced with diisopropyl ether azeotropically. The resulting residue is crystallized from n-hexane-diisopropyl ether (5/1) (600 ml), and then stirred under ice-cooling. The precipitates are collected by filtration, washed with cold n-hexan,e-diisopropyl ether (10/1) (600 ml) several times and dried to give the title compounds (194.5 g). APCI-MS M/S:251tM+NH4]*. Reference Examples 25-36 The corresponding compounds are treated in a similar manner to Reference Example 24 to give the following compounds. t-Butyl {2-cyanophenoxy)acetate (300.0 g) obtained 5 in Reference Example 24 is dissolved in dichloromethane (400 ml), and rhereto is added trifluoroacetic acid (990 ml) and the mix-ure is stirred at room temperature for 4 hours. The reaction solution is concentrated under reduced pressure, the resulting residue is suspended in diethyl ether (100 ml) and diisopropyl ether (500 ml) is poured thereto. The precipitates are collected by filtration, washed with diisopropyl ether several times and dried to give the title compound (198.4 g). tetrahydrofuran (20 ml), thereto is added 10% palladium-carbon [100 mg) and the mixture is stirred for 2 hours under atmospheric hydrogen pressure. The insolubles are removed by filtration, and then the filtrate is concentEated under reduced pressure to give t-butyL (4-amino-2-cyanophencxy}acetate (440 mg}. APCI-MS M/Z:249[M+H]*. (2) t-Butyl (4-amino-2-cyanophenoxy)acetate (430 mg) obtained in Reference Example 50(1) is dissolved in tetrahydrofuran (10 ml}, is added saturated sodium hydrogen carbonate solution (10 ml), and then is added benzyl chloroformate (355 mg} under ice-cooling. Under ice-cooling, the reaction solution is stirred for 1 hour and extracted with ethyl acetate. The organic layer is washed with saturated iDrine, dried over sodium sulfate, evaporated to remove the solvent under reduced pressure. The resulting residue is purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate = 9/1 followed by 3/1} to give t-butyl (4-benzyloxycarbonylamino-2-cyanophenoxy}acetate (540 mg). APCI-MS M/Z:383[MH]. (3) t-Butyl (4-benzyloxycarbonylamino-2- cyanophenoxy)acetate (100 mg) obtained in Reference Example 50(2) is dissolved in N,N-dimethylformamide (3 ml) and thereto is added 60% oleaginous sodium hydride (12.5 mg). After the mixture is stirred for 20 minutes at room temperature, methyl iodide (24.4 fil) is added thereto dropwise and the mixture is further stirred for one hour. To the reaction solution is poured saturated aqueous ammonium chloride solution and extracted with ethyl acetate. The organic layer is washed successively with water and saturated brine, dried over sodium sulfate and evaporated to remove the solvent. The resulting residue is purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate = 9/1 followed by 3/1) to give t-butyl [4-(N-benzyloxycarbonyl-N-methylamino)-2-cyanophenoxy]acetate (91 mg) . APCI-MS M/Z:414 [M+NHa]. (4) t-Butyl [4-(N-benzyloxycarbonyl-N-methylamino)- 2-cyanophenoxy]acetate (2.42 g) obtained in Reference Example 50(3) is treated in a similar manner to Reference Example 37 to give the title compound (2.06 g). ESI-MS M/Z:339[M-H]". Reference Example 51: (2-Cysnophenoxy)-N-(5-chloropyridin- dimethyiformamide (10 drops) and the mixture is stirred at room temperature for 3.5 hours. The reaction solution is cooled on ice-bath, thereto is added 2-amino-5-chloropyridine (32.08 g), and then pyridine (60.54 ml) is added. After 5 minutes, the reaction solution is warmed to room temperature and stirred overnight. To the reaction solution is added ice-water, and the solution is adjusted to about pH 4 with 10 % hydrochloric acid, and then is extracted with chloroform. The organic layer is washed successively with water, saturated aqueous sodium hydrogen carbonate and saturated brine, dried over sodium sulfate and evaporated to remove the solvent. The resulting residue is suspended in chloroform-ethyl acetate and collected by filtration to give (2-cyanophenoxy)-N- (5-chloropyridin~2-yl)acetamide (51.58 g). Furthermore, the filtrate is concentrated under reduced pressure, and then purified by silica gel column chromatography (eluent: chloroform) to give the title compound (11.50 g). APCI-MS M/Z:288/290[M+H]*. Reference Example 52-66 The corresponding compounds are treated in a similar manner to Reference Example 51 to give the following Reference Example 67: (2-Cyanophenoxy)-N-(4-chlorophenyl}- acetamide Reference Example 37 is dissolved in N, N-dimethylformamide (300 ml), thereto are added 4-chloroaniline (25.9 g}, 4-dimethylaminopyridine (22.7 g) and 1-ethyl-3-(3-dimethylaminopropyl}carbodiimide hydrochloride (35.6 g) successively and the mixture is stirred for 3 hours at room temperature. The reaction solution is concentrated under reduced pressure and the resulting residue is diluted with ethyl acetate-tetrahydrofuran, washed successively with water, 5% hydrochloric acid, water and saturated brine, dried over sodium sulfate and evaporated to remove the solvent. The resulting residue is suspended in diisopropyl ether, and then the precipitates are collected by filtration to give the title compound (44.00 g). APCI-MS M/Z:287/289[M+H]. Reference Examples 68-71 The corresponding compounds are treated in a similar manner to Reference Example 67 to give the following compounds. I Reference Example 72: 3-Amlno-5-methoxycarbonyl-N-(5- chloropyridin-2-yl)benzofuran~2-carboxamide I 2-{4-Methoxycarbonyl-2-cyanophenoxy)-N-(5- chloropyridin-2-yl}acetamide (1.73 g) obtained in Reference Example 20 is dissolved in N,N-dimethylacetamide (15 ml), thereto is added sodium carbonate (160 mg) and the mixture is stirred at lOO'C for 2 hours. After allowing to cool, to the reaction solution is poured ice-water, and the resulting precipitates are collected by filtration, washed successively with water, tetrahydrofuran and diethyl ether and dried to give the title compound {1.20 g}. APCI-MS M/Z:346/348[M+H]*. Reference Example 73: 3-Amino-5-methoxycarbonylmethyl-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide 2-[2-Cyano-4-(methoxycarbonylmethyl)phenoxy]-N-(5-chloropyridin-2-yl)acetamide [500 mg) obtained in Reference Example 21 is dissolved in N,N-dimethylacetamide (15 ml), thereto is added sodium carbonate (74 mg) and the mixture is stirred at 100°C for 16 hours. After allowing to cool, to the reaction solution is poured ice-vjater and extracted with ethyl acetate. The organic layer is washed successively with water and saturated brine, dried over sodium sulfate and evaporated to remove the solvent. The resulting residue is purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate/chloroform = 3/1/1), suspended in diethyl ether-n-hexane, and then the precipitates are collected by filtration to give title compound (180 mg). APCI-MS M/Z:360/362[M+H]". Reference Example 74: 3-Amino-N-(5-chloropyridin-2- (150.00 g) obtained in Reference Example 51 is dissolved in N,N-dimethylacetamide (1500 ml), thereto is added sodium carbonate (60.8 g) and the mixture is stirred at 70°C for 7 hours. After allowing to cool, the reaction solution is poured to ice-water, and the resulting precipitates are collected by filtration and washed with water several times. The precipitates are dissolved in ethyl acetate, washed with water and saturated brine, dried over sodium sulfate and the organic layer is treated with activated charcoal. The insoluble materials are filtered, and then the filtrate is concentrated under reduced pressure and the resulting residue is suspended in diethyl ether-ethyl acetate. The precipitates are collected by filtration, washed with diethyl ether, and dried to give the title compound [119.33 g). i APCI-MS M/Z: 283/290[M+H]*. Reference Examcles 75-96 1 The corresponding compounds are treated in a similar manner to Reference Example 72, 73 or 74 to give the following compounds. To the suspension of [2-cyano-4-methoxyphenoxy)-N-(5-chloropyridin-2-yl)acetamide [40.0 g) obtained in Reference Example 59 in dichlaromethane (2000 ml, boron tribromide (173 g) is added at -58°C dropwise over 40 minutes. The reaction solution is stirred for 26 hours with keeping the internal temperature between -20°C and 0°C, and then poured to an ice-water. The precipitated solid is collected by filtration, washed with water, and then dried under reduced pressure. A part of the resulting solid (37.2 g), i.e. 24.3 g thereof is purified by silica gel column chromatography (eluent: chloroform/methanol = 50/1-10/1) to give the title compound (17.0 g). APCI-MS M/Z:304/306[M+H]. Reference Example 98: 3-Araino-5-hydroxy-N-(5-chloropyridin- (2-Cyano-4-hydroxyphenoxy) -N- [5-chloropyriciin-2-yl)acetamide (321 mg) obtained in Reference Example 97 is treated in a similar manner to Reference Example 73 to give the title compound (274 mg). APCI-MS M/Z:304/306[M+H]*. Reference Example 99: f4-t-Buthoxycarbonylmethoxy-2- (2-Cyano-4-hydroxyphenoxy)-N-{5-chloropyridi-2-yl) acetamide (5.75 g) obtained in Reference Example 97 is dissolved in acetone [160 ml) and to the solution, are added cesium carbonate (8.08 g> , t-butyl bromoacetate (4.58 g) and sodium iodide (3.64 g). The reaction solution is heated under reflux for 8 hour, thereto are added additional cesium carbonate (1.89 g), t-butyl bromoacetate (840pl) and sodium iodide (875 mg) and the mixture is heated under reflux for additional 14 hours. After allowing to cool, the reaction solution is poured to an ice-water, adjusted pH 1-2 with 10% hydrochloric acid and extracted with ethyl acetate. The organic layer is dried over sodium sulfate and evaporated to remove the solvent. The resulting residue is purified by silica gel column chromatography (eluent: hexane/ethyl acetate = 3/1, 2/1 followed by 1/1) and furthermore, purified by NH-silica gel column chromatography (eluent: hexane/ethyl acetate ~ 2/1 followed by 1/1) to give the title compound (4.02 g). APCI-MS M/2:418/420[M+H]Reference Example 100: 3-Amino-5-t-butoxycarbonylmethoxy-N- (5-chloropyridin-2-yl}benzofuran-2-carboxamide (4-t-Buthoxycarbonylmethoxy-2-cyanophenoxy]-N-(5-chloropyridin-2-yl)acetamide (8.18 g) obtained in Reference Example 99 is treated in a similar manner to Reference Example 73 to give the title compound (5.72 g). APCI-MS M/Z:418/420[M+H]. Reference Example 101: 3-Amino-5-(2-methoxyethoxy)-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide (1) (2-Cyano-4-hydrozyphenoxy)-N-(5-chloropyridin-2- yl)acetamide (100 mg) obtained in Reference Example 57 is dissolved in tetrahydrofurar., and thereto are added 2-methoxyethanol (9.30 ml) and triphenylphosphine (31.0 g), and further diethyl azodicarboxylate (22.2 ml) is added dropwise under ice-cooling. The reaction solution is warmed to room temperature and stirred for 17 hours and concentrated under reduced pressure. To the resulting residue is poured diisopropyl ether, and the insoluble materials are removed by filtration, and then the filtrate is concentrated under reduced pressure. The resulting residue is purified by silica gel column chromatography (eluent: chloroform/ethyl acetate = 10/1) to give [4-(2-methoxyethoxy)-2-cyanophenoxy]-N-(5-chloropyridin-2-yl}acetamide (71.48 g) as a crude material, which is used for next step without further purification. APCI-MS M/Z:362/364[M+H]. (2) The crude material containing [4-(2-methoxyethoxy)-2-cyanophenoxy]-N-(5-chloropyridin-2-yljacetamide (71.48 g) obtained in Reference Example 101(1 is treated in a similar manner to Reference Example 72 to give the title compound (24.40 g). APCI-MS M/Z:362/364[M+H1\ Reference Examples 102-106 (2-Cyano-4-hydroxyphenoxy)-N-(5-chloropyridin-2-yDacetamide obtained in Reference Example 97 and the corresponding alcohol are treated in a similar manner to Reference Example 101 to give the following compounds. Reference Example 107: (2, 4-Dicyanophenoxy)-N-(5- chloropyridin-2-yl> acetamide 4-liitrobenzonitrile (3.02 g) and potassium cyanide (2.02 g) are dissolved in dimethyl sulfoxide (100 ml) and stirred at 100°C for an hour. The reaction solution is allowed to cool until room temperature and, thereto are added potassium carbonate (1.49 g), 2-chloro-N-(5-chloropyridin-2-yl)acetamide (10.42 g) obtained in Reference Example 20(1) and sodium iodide (8.76 g), and the mixture is stirred at 60°C for 4.5 hours. The reaction solution is poured to water, and the precipitated solids are collected by filtration, washed with water and dried in air. The resulting solid is dissolved in ethyl acetate, dried over sodium sulfate, evaporated to remove the solvent under reduced pressure. The resulting residue is purified by silica gel column chromatography (eluent: hexane/ethyl acetate = 5/1 to 1/1), and then the resulting residue is suspended in ethyl acetate-diisopropyl ether. The precipitates are collected by filtration and dried to give the title compound (2.81 g). APCI-MS M/Z:313/315[M+H]. Reference Example 108: 3-Amino-5-cyano-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide (2,4-Dicyanophenoxy)-N-(5-chloropyridin'2-yDacetamide (1.02 g) obtained in Reference Example 107 is treated in a similar manner to Reference Example 73 to give (1) 2-Cloro-N-(5-chloropyridin-2-yl)acetamide (30.68 g) obtained in Reference Example 20(1) is dissolved in N,N-dimethylformamide (500 ml}, thereto is added sodium acetate (24.55 g) and the mixture is stirred at 60°C for 5 hours. The reaction solution is diluted with ethyl acetate, washed successively with water and saturated brine. The solution is dried over magnesium sulfate, treated with activated charcoal, and the filtrate is concentrated under reduced pressure. The resulting residue is suspended in n-hexane and the resulting crystals are collected by filtration, washed with n-hexane, and dried to give N-(5-chloropyridin-2-yl) -2-acetoxyacetainide (30.58 g). APCI-MS M/2:229/231[M+H]*. (2j 2-Acatcxy-N-(5-chloropyridin-2-yl)acetamide (30.36 g) obtained in Reference Example 109(1) is suspended in methanol (1200 ml) and thereto is added potassium carbonate (22.0 g) under ice-cooling. The reaction solution is warmed to room temperature, stirred for 0.5 hours and concentrated under reduced pressure. To the resulting residue are poured ethyl acetate (1500 ml) and ice-water (1000 ml), and then the mixture is extracted with ethyl acetate. The organic layer is washed with saturated brine, dried over sodium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is suspended in a small amount of ethyl acetate, thereto is added diisopropyl ether and the precipitated crystals are collected by filtration, washed with diisopropyl ether and dried to give 2-hydroxy-N-(5-chloropyridin-2-yl)acetamide (22.85 g}. APCI-MS M/Z:187/189[M+F1]*. {3} 2-Chloro-6-nitrobenzonitrile (187 mg) and 2-hydroxy-N-(5-chloropyridin-2-yl)acetamide (18 3 mg} obtained in Reference Example 109(2) are dissolved in N,N-dimethylformamide (2 ml) and thereto is added 60 % oleaginous sodium hydride (80 mg) under ice-cooling. After stirring for 6 hours with cooling, to the reaction solution is poured saturated aqueous ammonium chloride solution and extracted with ethyl acetate. The organic layer is washed with water and saturated brine, dried over sodium sulfate and evaporated to remove the solvent under reduced pressure, The resulting residue is suspended in n-hexane-diisopropyl ether, the resulting product is collected by filtration and dried to give the title compound (286 mg). APCI-MS M/Z:322/32'3 [M+H]*. Reference Example 110: 3-Amino~4-chloro-N-(5-chloropyridin- 2-yl)benzofuran-2-carboxamide {3-Cloro-2-cyanophenoxy)-N-{5-chloropyridin-2-yL)acetamide (274 mg) obtained in Reference Example 109 is dissolved in N,N-dimethylacetamide (10 ml), thereto is added cesium carbonate (333 mg) and the mixture is stirred at 100°C for 8 hours. After allowing to cool, to the reaction solution is added ice-water, the precipitates are collected by filtration and washed with water. The precipitates are dissolved in hot ethyl acetate, washed with saturated brine and dried over sodium sulfate. To the organic layer are added activated charcoal and NH-silica gel (5 g) and the mixture is filtered to remove the insoluble materials. The filtrate is concentrated under reduced pressure, the resulting residue is suspended in ethyl acetate-diethyl ether and the resulting product is collected by filtration to give the title compound (112 mg} . APCI-MS M/2:322/324[M+H]. Reference Example 111: 3-Amino-4-methoxy-N-(5-chloropyridin-2-yi; benzofuran-2-carboxamide hydroxy-N-(5-chloropyridin-2-yl]acetamide (560 mg) obtained in Reference Example 109(21 are dissolved in N,N-dimethylacetamide (10 ml) and thereto is added potassium carbonate [810 mg). The reaction solution is stirred at 60°C overnight, thereto is added additional potassium carbonate (810 mg) and the mixture is siiirred at 100°C for 4 hours. After allowing to cool, to the reaction solution is poured ice-water and extracted with ethyl acetate. The organic layer is washed with water and saturated brine, dried over sodium sulfate and treated with activated charcoal. The insoluble materials are removed by filtration, washed with chloroform-methanol, and the filtrate and the washing are combined and concentrated under reduced pressure. The resulting residue is suspended in diisopropyl ether, and then the resulting product is collected, by filtration to give the title compound (104 lug) . APCI-M3 M/Z:317/319[M+H]*. Reference Example 112: Methyl trans-4-(t-butoxycarbonyl-amino)cyclohexanecarboxylare (1) Thionyl chloride (254 ml) is added dropwise to methanol (1500 ml) under cooling to -30°C over a period of about one hour. After the addition, the reaction mixture is stirred at room temperature for 0.5 hours, thereto is added trans-cyclohexane-1,4"dicarboxylic acid (500.0 g) and the mixture is stirred at room temperature for 17 hours. The reaction solution is concentrated under reduced pressure, the residue is diluted with chloroform, and then washed with saturated aqueous sodium hydrogen carbonate solution and saturated brine. The organic layer is dried over sodium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is crystallized from n-hexane, the resulting product is collected by filtration, dried to give dimethyl trans-cycIohexane-1,4-dicarboxyLate {545.0 g). APCI-MS M/Z:201[M+H]*. (2} Dimethyl trans-cyclohexane-1,4-dicarboxylate (150.0 g) obtained in Reference Example 112(1) is dissolved in tetrahydrofuran (1500 ml) and to the solution is added dropwise a mixture of 28 % sodium methoxide-in methanol (149 g) and water (13.2 g) under ice-cooling. The reaction solution warmed to room temperature, stirred for 3.5 hours, thereto is added n-hexane (1500 ml) and the mixture is filtrated to collect the precipitates. The resulting solid is added to a mixture of cone, hydrochloric acid (50 ml), water (450 ml) and chloroform (1000 ml) under ice-cooling, and stirred at room temperature for 20 minutes. The chloroform layer is separated and the aqueous layer is extracted with chloroform. The organic layers are combined, dried over sodium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is crystallized from n-hexane, the resulting product is collected by filtration and dried to give monomethyl trans-cyclohexane-1,4-dicarboxylate (106.0 g). ESI-MS M/Z:185[M-K]". (3) Monomethyl trans-cyclohexane-1,4-dicarboxylate (100.0 g) obtained in Reference Example 112(2) is dissolved in t-buthanol (1000 ml), thereto are added diphenylphosphoryl azide (155 g) and triethylamine (78.6 ml). The mixture is heated at about 60°C for one hour and further heated under reflux for additional 17 hours. After allowing to cool, to the reaction solution is added ice-water, and the mixture is extracted with ethyl acetate. The organic layer is washed with saturated aqueous sodium hydrogen carbonate solution and saturated brine, dried over sodium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is dissolved in methanol (250 ml), thereto is added water (750 ml) and the mixture is stirred under ice-cooling. After 0.5 hours, the precipitates are collected by filtration, washed with water-methanol (3:1, 1000 m.l) and n-hexane successively and cyclohexanecarboxylats (234.0 g) obtained in Refarence Example 112 is dissolved in dioxane (500 ml), and thereto is added 4 N hydrogen chloride-dioxane (500 ml), and the mixture is stirred at room temperature for 19 hours. The reaction solution is concentrated under reduced pressure, and the resul-ing residue is suspended in diethyl e::her, and then the precipitates are collected by filtration to give methyl trap.s-4-3minocyclohexanecarboxylate hydrochloride (121.9 g). APCI-MS M/Z:158[M+H]. (2) Methyl trans-4-aminocyclohexanecarboxylate hydrochloride (45.31 g) is suspended in dichloromethane (1000 ml), thereto is added 4-chlorobutyryl chloride (31.5 ml) under ice-cooling and io the mixture is added dropwise a solution of trie-hylamine (81.5 ml) in dichloromerhane (80 ml). The reaction solution is warmed to room remperarure, stirred for 3 hours and the reaction solution is concentrated under reduced pressure. To the resulting residue are poured euhyl acetate and 5 % hydrochloric acid, and the organic layer is separated, washed with saturated aqueous sodium hydrogen carbonate solution and saturated brine. The organic layer is dried over sodium sulfate and treated with activated carbon, and the filtrate is concentrated under reduced pressure. The resulting residue is suspended in diisopropyl ether, filtered to collect the precipitates, dried to give methyl trans-4-(4-chloro-butyrylam.ino) cyclohexanecarboxylate (38.81 g) . APCI-MS M/Z:262/264[M+H]'. (3) Sixty % sodium hydride in oil (9.60 g) is suspended in M,K-dimethyacetamide (500 ml], to this mixture is added methyl tran3-4-(4-chlorobutyrylamino)-cyclohexanecarboxylate (52.32 g) obtained in Reference Example 113(2) gradually under ice-cooling. The reactior. solution is warmed to room temperature, stirred for 24 hours, and thereto are poured saturated aqueous amimonium chloride solution and ice-water, and the mixture is extracted with chloroform. The organic layer is washed with saturated brine, dried over magnesium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is purified by silica gel column chromatography (eluent: ethyl acetate) and the obtained solid is suspended in n-hexane~diisopropyl ether. The resulting crystals are collected by filtration and dried to give methyl trans--.- ( 2-OKO-pyrrolidin-l~yl) cyclohexane¬carboxylate ■:39.20 g} . APCI-MS M/Z:226"M-HT- (4) Me'hyl trar.s-4-(2-oxo-pyrrolidin-l-yl) cyclor.exar.ecarboxylate [39. 15 g) obtained in Reference Example 113(3; dissolved in methanol (400 ml), and -hereto is added 2 N aqueous sodium hydroxide solution (60 nil and the mixture is stirred at room temperature for 3 hours. The reaction solution is adjusted to oH 1-2 by pouring 10 % hydrochloric acid under ice-cooling, saturated with sodium chloride, and then extracted with chloroform. The organic layer is dried over sodium sulfate, and then evaporated to remove the solvent under reduced pressure. The resulting residue is suspended in a small amount of ethyl acetate, and diisopropyl ether is poured thereto, and the resulting crystals are collected by filtration. The crystals are washed with diisopropyl ether several times and dried to give the title compound (35.94 g), ESI-MS M/Z:210[M-K]". Reference Example 114: Trans-4-(H-acetyl-N-methylamino)- (1) Methyl trans-4-(t-butoxycarbonylamino)-cyclohexanecarboxylate (30.30 g) is dissolved in N,M-dimethylformiamiae (150 ml) and thereto is added 60 % sodium hydride in oil (5.60 g> under ice-cooling. After stirring for 0.5 hours under ooclinc, to the reaction solution are added methyl iodide (14.5 m.l) and methanol (0.15 ml. the solution is added acetyl chloride (8.42 ml) under ice-cooling, and then a solution of triethylamine (38.1 ml) in dichloromethane (40 ml) is added dropwise. The reaction solution is warmied to room temperature, stirred for 2 hours, thereto is added"5 % hydrochloric acid and the mixture is extracted with dichloromethane. The organic layer is washed with saturated brine, dried over sodium sulfate and evaporated to remov_ the solvent under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: ethyl acetate) to give methyl trans-4-(N-acetyl-N-methylamino)cyclohexanecarboxylate (19.05 g). APCI-MS M/Z:214[M+H]*. (4) Methyl trans-4-(N-acetyl-N-methylamino)-cyclohexanecarboxylate (19.00 g) obtained in Reference Example 114(3) is dissolved in methanol (200 ml), thereto is added aqueous 2 N sodium hydroxide solution (60 ml) and the mixture is stirred at room temperature for 3 hours. Under ice-cooling, the reaction solution is adjusted to pH 1-2 with 10 % hydrochloric acid, saturated with sodium chloride, and then extracted with chloroform. The organic layer is dried over sodium sulfate, and then evaporated to remove the solvent under reduced pressure. The resulting residue is suspended in a small amount of ethyl acetate, to the mixture is poured diiscpropyl ether and the crystals are collected by filtraticn. The crystals are washed with diisopropyl erher several cimes and dried to give the title cyclohexanecarboxylate [44.78 g> obtained in Reference Example 114(1) is dissolved in methanol (300 ml), thereto is added aqueous 2 N sodium hydroxide solution (100 ml) and the mixture is stirred at room temperature for 6 hours. The reaction solution is concentrated under reduced pressure, to the residue are added ice-water, ethyl acetate and 10 % hydrochloric acid under ice-cooling and then the mixture is extracted with ethyl acetate. The organic layer is washed with water and saturated brine successively, dried over sodixim sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is suspended in a small amount of ethyl acetate, to the mixture is poured n-hexane and the crystals are collected by filtration. The crystals are washed with n-hexane-diisopropyl ether several times and dried to give the title compound (39.20 g). ESl-MS M/2:256[M-H]" Reference Exa-ole 116: Trans-4- (t-butoxycarbonyl-amino) cyclohexanecarboxylic acid hydrochloride (93.0 g] obtained in Reference Example 113(1) is dissolved in methanol (1000 ml) , thereto are added aqueous 35 % formaldehyde solution (95.4 ml), sodium acetate (39.4 g) and 10 % palladium-carbon (10 g), and the mixture is stirred for 3.5 hours under atmospheric hydrogen pressure. The insoluble materials are removed by filtration, the filtrate is concentrated under reduced pressure, to the resulting residue is added aqueous 20 % potassium carbonate solution {500 ml}, and the reaction mixture is extracted with chloroform. The organic layer is dried over sodium sulfate and potassium carbonate and evaporated to remove the solvent under reduced pressure. The resulting residue is purified by HH-silica gel column chromatography (eluent: n-hexane/ethyl acetate = 2/1) to give methyl trans-4-dimethylaminocyclohexanecarboxylate (87.3 g). APCI-MS M/Z:186[M+H]"'. [2) Methyl trans-4-diraethylaminocyclohexane-carbosylate (27.6 g) obtained in Reference Example ill (1) is dissolved in dioxane (300 ml) and water (100 ml), thereto is added 6 N hydrochloric acid (50 ml) and the mixture is heated under reflux for 4 hours. To the mixture is added additional 6 N hydrochloric acid (50 ml) and the reaction mixture is heated under reflux for another one hour. The reaction solution is concentrated under reduced pressure, subjected to azeotropic distillation with toluene, and then the resulting residue is suspended in diisopropyl ether. The precipitates are collected by filtration, washed with diisopropyl ether and dried to give the title compound (27.5 g). APCI-MS M/Z:172[M+H]*. Reference Example 118: Trans-4-(pyrrolidin-1-yl)- suspended in a mixture of tetrahydrofuran (300 ml) and N,N-dimethyl acetamide (60 ml), and the mixture is stirred at 70°C for 20 hours. The reaction solution is concentrated under reduced pressure, the residue is dissolved in ethyl acetate-water and the organic layer is separated. The organic layer is washed with water and saturated brine, dried over sodium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: ethyl acetate/hexane = 1/5) to give methyl trans-4-(pyrrolidin-1-yl)cyclohexanecarboxylate (10.9 g). APCI-MS M/2:212[M+H]. (2) To a solution of methyl trans-4-(pyrrolidin-1-yl)cyclohexanecarboxylate (10.9 g) obtained in Reference Example 113(1) in dioxane (150 ml) is added 2 K hydrochloric acid (80 ml), and the mixture is stirred at 110°C for 3 hours while evaporating to remove methanol. The reaction solution is concentrated under reduced pressure, the resulting residue is suspended in diethyl ether, and then collected by filtration to give the title compound (11.1 g). APCI-MS M/Z:198[M+H]*. Reference Example 119: Trans-4-(morpholin-4-yl)cyclohexane- f1) Methyl trans-4-aminocyclohexanecarboxylate hydrochloride (47.5 g) obtained in Reference Example 113(1), bis(2-chloroethyl) ether (34.5 ml), sodium carbonate (77.9 g) and sodium iodide (88 g) are suspended in a mixture of tetrahydrofuran (1400 ml) and N,N-dimethylacetamide (280 m.l), and the mixture is heated under reflux for 18 hours. Bis(2-chloroethyl) ether (23 ml) and sodium iodide (22 g) are added to the reaction solution and the mixture is refluxed for additional 6 hours. The reaction solution is concentrated under reduced pressure, and the residue is dissolved in ethyl acetate-water and the organic layer is separated. The organic layer is washed with water and saturated brine, dried over sodium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: ethyl acetate/hexane = 1/30, followed by ethyl acetate/hexane = 1/5, and then 1/3) to give methyl trans-4-(morpholin-4-yl)cyclohexanecarboxylate (53.9 g) . APCI-MS M/Z:228[M+H]*. (2) To a solution of methyl trans-4-(morpholin-4-yl)cyclohexanecarboxylate (53.8 g) obtained in Reference Example 119(1) in dioxane (750 ml) is added 2 N hydrochloric acid (400 ml), and the mixture is stirred at 110°C for 4 hours while evaoorating to remove methanol. The reaction solution is concentrated, and the resulting residue is suspended in diethyl ether, and then the resulting product is collected by filtration to give the title compound (54.8 g). APCI-MS M/Z:214[M+H]. Reference Example 120: Trans-[4-(diraethyLamino) cyclohexyl]- (1) Potassium hydroxide {12.8 g) is dissolved in water (30 ml) and thereto is added diethyl ether (45 ml). Uader ice-cooling, to the resulting miKture is added N-nitroso-N-methylurea (5.07 g). The reaction solution is stirred for 10 minutes under cooling, and the organic layer is separated and dried over potassium hydroxide to give a solution of diazomethane in diethyl ether. (2} Under argon atmosphere, trans-4-(t-butoxycarbonylamino)cyclohexanecarboxylic acid (3.0 g) obtained in Reference Example 116 is suspended in diethyl ether (40 ml), thereto is added triethylamine (1.89 ml) at -10°C, and then isobutyl chloroformate (1.75 ml) is added dropwise to the mixture. The reaction solution is stirred at -lOC for 30 minutes, and a solution of diazomethane in diethyl ether obtained in Reference Example 120(1) is added dropwise to the reaction solution at -lOC, and the mixture is warmed to room temperature and stirred for 15 hours. Under ice-cooling, 10 % aqueous citric acid solution is poured to the solution, and the organic layer is separated. The organic layer is washed vith saturated aqueous sodium hydrogen carbonate solution, water and saturated brine, dried over sodium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is purified by silica gel column chromatography (eluent: ethyl acetate/hexane = 1/3, followed by ethyl acetate/hexane = 1/2} to give t-butyl trans-[4-(2-dia2oacetyl)cyclohexyl]-carbamate(1.86 g). APCI-MS M/Z:285[M+NH4]*. (3) t-Butyl trans-[4-(2-dia2oacetyl)cyclohexyl]- carbamate (1.62 g) obtained in Reference Example 120(2) is dissolved in methanol (30 ml) in a light shielding reaction vessel under argon atmosphere, and the mixture is cooled to -250. To the reaction solution is added a solution of silver benzoate (153 mg) in triethylamine (2.4 ml), and the mixture is warmed to room temperature and stirred for 3 hours. The reaction solution is concentrated under reduced pressure, the resulting residue is dissolved in ethyl acetate, washed with saturated aqueous sodium hydrogen carbonate solution, saturated aqueous ammonium chloride solution and saturated brine successively, dried over sodium sulfate and evaporated to remove the solvent, which provides methyl trans-4-(t-butoxycarbonylamino)- cyclohexyl]acetate (1.25 g). APCI-MS M/Z:2&9[M+NK4](4) To a solution of methyl trans-[4-(t- butoxycarbonyl-amino} cyclcr.exyl] acetate (1.23 g) obtained in Reference Example 120(3) in 1,4-dioxane (8 ml), is added 4 N hydrogen chloride-dioxane solution (8 ml) and the mixture is stirred at room temperature for 5 hours. The reaction solution is concentrated to dryness under reduced pressure to give methyl trans-(4-aminocyclohexyl)acetate hydrochloride (898 mg). APCI-MS M/Z:n2[M+H](5) Under ice-cooling, to a suspension of methyl trans-(4-aminocyclohexyl)acetate hydrochloride (895 mg) obtained in Reference Example 120(4} in dichloromethane (30 ml), triethylaraine (1.2 ml) is added and the mixture is stirred. Aqueous 35 % formaldehyde solution [1.71 ml) and sodium triacetoxy borohydride (2.74 g) are added thereto successively under ice-cooling. The reaction solution is warmed to room temperature and stirred for 6 hours. Saturated aqueous sodium hydrogen carbonate solution is poured into the mixture under ice-cooling and the mixture is extracted with chloroform. The organic layer is washed ■ with saturated brine, dried over sodium sulfate, and then the solvent is removed under reduced pressure to give methyl trans-[4-(dimethylamino)cyclohexyl]acetate (771 mg). APCI-MS M/Z:200[M+H]. (6) To a solution of methyl trans-[4- (diraethylamino)cyclohexyl] acetate [760 mg) obtained in Reference Example 120(5) in dioxane [25 ml), 1 N hydrochloric acid (15 ml) is added and the mixture is heated under reflux for 3 hours. The reaction solution is concentrated under reduced pressure, and the resulting residue is suspended in diethyl ether. The precipitates are collected by filtration and dried to give the title compound (795 mg). APCI'MS M/Z: 186[M+H]Reference Example 121: Trans-4-(dimethylaminomethyl)~ (6.29 g) is suspended in methanol (32 ml) and to the suspension is added dropwise thionyl chloride (6 ml] under ice-cooling. The reaction solution is warmed to room temperature, stirred overnight and concentrated under reduced pressure to dryness, which provides methyl trans-4-(aminomethyl)cyclohexanecarboxylate hydrochloride (8.69 g). APCI-MS M/Z:172[M+H]. (2) Methyl trans-4-(aminomethyl)cyclohexane¬carboxylate hydrochloride (8.69 g) obtained in Reference Example 121(1) is suspended in dichloromethane (400 ml), thereto is added triethylamine (11.2 ml), and the mixture is stirred at room temperature for several minutes and thereto are added 35 % aqueous formaldehyde solution (15.9 ml) and sodium triacetoxyborohydride [25.43 g) under ice-cooling. The reaction solution is warmed to room temperature, stirred for 2 hours, to the solution is poured a saturated aqueous sodium hydrogen carbonate solution and the solution is extracted with chloroform. The organic layer is washed with water and saturated brine successively, dried over sodium sulfate and evaporated to remove the solvent to give methyl trans-4-(dimethylamino-methyl)cyclohexanecarbcxylate (7.42 g). APCI-MS M/Z:200[MH]i3) Methyl trans-4-(dimethylaminomethyl)-cycLohexanecarboxylate (7.41 g) obtained in Reference Example 121(2) is dissolved in dioxane (140 ml), thereto is added 2 N hydrochloric acid (70 ml), and the mixture is heated under reflux for 3 hours. After allowing to cool, the reaction solution is concentrated under reduced pressure, the resulting residue is subjected to aseotropic distillation with toluene, and then the resulting product is dried to give the title compound (8.45 g). APCI-MS M/Z:186[M+H]\ Reference Example 122: Trans-4-(t-butoxycarbonylamino- Trans-4-(aminomethyl)cyclohexanecarboxylic acid (8.35 g) is suspended in dioxane (100 ml), thereto are added water (50 ml) and 1 N aqueous sodium hydroxide solution (50 ml), and then di-t-butyl dicarbonate (12,7 g) is added dropwise under ice-cooling. The reaction solution is warmed to room temperature, stirred for 4 hours and the reaction solution is concentrated under reduced pressure. The resulting residue is diluted with ethyl acetate, adjusted to sbo-at pH 3-4 by addition of aqueous citric acid solution and extracted with ethyl acetate. The organic layer is washed with water and saturated brine, dried over sodium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is suspended in n-hexane, and the resulting product is collected by filtration and dried to give the title compound (13.30 g). ESI-MS M/Z:255[M-H]". Reference Example 123: Ethyl 3-(piperidin-4-yl)propionate (1) Sixty I sodium hydride in oil (33.6 g) is suspended in tetrahydrofuran (600 ml) and a solution of triethyl phosphonoacetate (18B.4 g) in tetrahydrofuran (100 ml) is added dropwise thereto under ice-cooling. The mixture is stirred for 0.5 hours under ice-cooling, and a solution of pyridine-4-carbaldehyde (75.00 g) in tetrahydrofuran (100 ml) is added thereto dropwise and the mixture is stirred for one hour. To the reaction solution is poured ice-water (1000 ml) under ice-cooling and the mixture is extracted with ethyl acetate. The orgaaic layer is washed with water, saturated aqueous sodium hydrogen carbonate solution and saturated brine successively, dried over sodium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is suspended in a small amount of diisopropyl ether under ice-cooling and the precipitates are collected by filtration. The precipitates are washed with a small amount of diisopropyl ether and n-hexane successively and dried to give ethyl 3-(pyridin-4-yl)acrylate (77.53 g). APCI-MS M/Z; 178 [M+H](2) Ethyl 3-(pyridin-4-yl)acrylate (28.00 g) obtained in Reference Example 123(1) is dissolved in acetic acid (280 ml), thereto is added platinum oxide (1.80 g) and the mixture is shaken under 55 psi hydrogen atmosphere at room temperature for 24 hours. The insoluble materials are removed by filtration and the filtrate is concentrated under reduced pressure. The resulting residue is dissolved in dioxane (200 ml), thereto are added 4 N hydrogen chloride-dioxane (200 ml) and the mixture is evaporated to remove the solvent under reduced pressure. The resulting residue is suspended in diethyl ether-diisopropyl ether, the precipitates are collected by filtration, washed with diisopropyl ether, and dried to give the title compound (33.50 g). APCI-MS M/Z:186[M+H]*. Reference Example 124; Ethyl (piperidin-4-yl) acetate Ethyl (pyriGin-4-yl)acetate (50.00 g) is dissolved in acetic acid (500 ml), thereto is added platinum oxide (3.44 g) and the mixture is shaken under S5 psi hydrogen atmosphere at room temperature for 20 hours. The insoluble materials are removed by filtration and the filtrate is concentrated under reduced pressure. The resulting residue is dissolved in dioxane (200 ml), thereto is added 4 N hydrogen chloride-dioxane (400 ml), and then the mixture is evaporated to remove the solvent under reduced pressure. The resulting residue is suspended in diethyl ether-diisopropyl ether, and the precipitates are collected by filtration, washed with diisopropyl ether, and then dried to give the title compound (61.80 g). APCI-MS M/Z;172[M+H]*. Reference Example 125: Ethyl 3-(l-isopropylpiperidin-4- Ethyl 3-(piperidin-4-yl)propionate hydrochloride (70.83 g! obtained in Reference example 123 is dissolved in ethanol {700 ml), thereto are added 2-iodopropane (38.2 ml) and potassium carbonate (132.3 g) and the mixture is heated under reflux for 6 hours. The insoluble materials are removed by filtration and the filtrate is concentrated under reduced pressure. The resulting residue is diluted with ethyl acetate (800 ml), washed with water and saturated brine successively, dried over sodium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography feluent: n-hexane/ethyl acetate = 20/1 followed by 9/1) to give the title compound (57.13 g) . APCI-MS M/Z:228[M+H]". Reference Examples 126-127; The corresponding compounds are treated in a similar manner to Reference Example 125 to give the following compounds. dioxane {1200 ml), thereto is added 2 N hydrochloric acid (600 ml) and the mixture heated under reflux for 3 hours. The reaction solution is concentrated under reduced pressure, subjected to azeotropic distillation with dioxane, and the resulting residue is suspended in diethyl ether-diisopropyl ether (1:1, 500 ml). The precipitates are collected by filtration, washed with diisopropyl ether and dried to give the title coinpound (55.36 g) . APCI-MS M/2:200[M+H]\ Reference Examples 129-130 The corresponding compounds are treated in a similar manner to Reference Example 128 to give the following triethylamine (26.0 ml) are dissolved in ethanol (10 ml] and water (30 ml), thereto is added ethyl isonicotinate (10.00 q), and then the reaction solution is heated at 150°C for 96 hours in a sealed tube. After allowing to cool, ethanol is added to the reaction solution and the insoluble materials are removed by filtration. The filtrate is concentrated under reduced pressure, the resulting residue is suspended in chloroform, the precipitates are collected by filtration and recrystallized from water-N,N-dimethylformamide to give the title compound (10.34 g). APCI-MS M/2:207 [M+H]'". Reference Example 132: [1-(Pyridin-4-ylSpiperidin-4- (1) Ethyl (piperidin-4-yl)acetate hydrochloride (5.00 g) obtained in Reference Example 124, 4-chloro- pyridine hydrochloride (3.62 g) and triethylamine (10.1 ml) are suspended in xylene (130 ml) and heated under reflux for 20 hours. The reaction solution is cooled with water and the insoluble materials are removed by filtration. The filtrate is concentrated under reduced pressure, the resulting residue is diluted with chloroform, washed with water, dried over magnesium sulfate, and then evaporated to remove the solvent under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography feluent: chloroform/ethyl acetate = 4/1) to give ethyl [1-(pyridin-4-yi)piperidin'4-yljacetate (4.15 g). APCI-MS M/Z:249[M+H]{2) Ethyl [1-(pyridin-4-yl)piperidin'4-yl]acetate (4.15 g) obtained in Reference Example 132(1) is dissolved in dioxane (200 ml), thereto is added 1 N hydrochloric acid (70 ml) and the mixture is heated under reflux for 4 hours. The reaction solution is concentrated under reduced pressure and the resulting residue is lyophilized to give the title compound (3.90 g). APCI-MS M/Z:221[M+H]\ Reference Example 133: 3-[1-(Pyriinidin-4-yl) piperidin-4- (1) Ethyl 3-(piperidin-4-yl)propionate hydrochloride (5.00 g) obtained in Reference Example 123 is suspended in tetrahydrofuran (50 ml) and thereto are added 4,6-dichloropyrimidine (2.80 g, and diisopropylethylamine (13.1 ml) at room temperature. The reaction solution is stirred for 3 hours ar room temperature, thereto is added water. and the mixture is extracted with ethyl acetate. The organic layer is washed with water and saturated brine successively, dried over sodium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is purified by silica gel column chromatography (eluent: n-hexane/ethyl acetate = 5/1, followed by 3/1) to give ethyl 3-[1-(6-chloropyrimidin-4-yl)piperidin-4-yl]propionate (5.58 g). APCI-MS M/Z:298/300[M+H](2) Ethyl'3-[1-(6-chloropyrimidin-4-yl)piperidin-4-yljpropionate (5.54 g) obtained in Reference Example 133(1) is dissolved in ethanol (100 ml), thereto is added 10 % palladium-carbon (0.55 g) and the mixture is stirred for 4 hours under hydrogen atmosphere under normal pressure. The insoluble materials are removed by filtration and the filtrate is concentrated under reduced pressure. Ethyl acetate and saturated aqueous sodium hydrogen carbonate solution are poured to the resulting residue, the organic layer is separated, washed with water and saturated brine successively, dried over sodium sulfate and evaporated to remove the solvent under reduced pressure to give ethyl 3-[1-(pyrimidin-4-yl)piperidin-4-yl]propionate (3.57 g). APCI-MS M/Z:264[M+H]". (3) Ethyl 3-[1-(pyrimidin-4-yl)piperidin-4-yl]-propionate [3.54 g) obtained in Reference Example 133(2) is dissolved in dioxane (140 ml), thereto is added 1 N hydrochloric acid {70 ml) and the mixture is heated under reflux for 3 hours. After allowing to cool, the reaction solution is concentrated under reduced pressure and subjected to diazetropic distillation with dioxane. The resulting residue is suspended in diethyl ether, and the resulting product is collected by filtration, washed with diethyl ether, and then dried to give the title compound (1) Lithium aluminum hydride (1.10 g) is suspended in tetrahydrofuran (80 ml), and thereto is added a solution of ethyl l-isopropylpiperidine-4-carboxylate {5.00 g) obtained in Reference Example 127 in tetrahydrofuran (30 ml) dropwise under ice-cooling. The reaction solution is stirred for 2 hours under the ice-cooling, and water {1.1 ml), 15 % aqueous sodium hydroxide solution (1.1 ml) and water (3.3 ml) are added dropwise successively and stirred for additional 10 minutes- To the resulting reaction solution is added potassium carbonate, and the mixture is stirred for 20 minutes, and then the insoluble materials are removed '::IY filtration. The filtrate is concen-rated under reduced pressure, and then the resulting residue is purified by NH-silica gel column chromatography (eluent: chloroform/erhyl acetate = 1/1) to give (1-isopropylpiperidin-4-yl)raethanol (4.29 g}. APCI-MS M/Z:158[M+H](2) Oxalyl chloride (2.0 ml) is dissolved in dichloromethane {120 ml) and thereto is added dropwise a solution of dimethylsulfoxide (3.3 ml) in dichloromeiihane (15 ml) under dry ice-acetone cooling. After stirring for 10 minutes under ice-cooling, a solution of (1-isopropylpiperidin-4-yl)methanol (3,00 g) obtained in Reference Example 134(1) in dichloromethane (30 ml] is added dropwise over a period of 15 minutes. After addition, the reaction solution is stirred for 2 hours under ice-cooling, and thereto is added dropwise triethylamine (13.3 ml) over a period of 10 minutes. The reaction solution is stirred for one hour while it is warmed to room temperature, and then the solution is poured to saturated aqueous sodium hydrogen carbonate solution. The mixture is extracted with dichloromethane and evaporated to remove the solvent under reduced pressure. The aqueous layer is extracted with ethyl acetate, and the extract is combined with the residue obtained by removing solvent from the above dichloromethane-extract, washed with water and saturated brine and dried over sodium sulfate. The solvent is evaporated under reduced pressure to give the crude material, l-isopropylpiperidine-4-carbaldehyde (1.96 g). APCI-MS M/2;:56[MrH]'. (3) Triethyl phosphcnoacetate (7.96 g) is dissolved in tetrahydrofuran (50 mil and thereto is added gradually 60 % sodium hydride in oil (1.45 g) under ice-cooling. After stirring for 20 minutes under ice-cooling, to the mixture is added l-isopropylpiperidine-4-carbaldehyde {5,03 g) obtained in Reference Example 134 {2} in tetrahydrofuran (25 ml). The reaction solution is stirred for 3 hours, diluted with diethyl ether, thereto is added water and the mixture is extracted with ethyl acetate. The organic layer is washed with water and saturated brine, dried over sodium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is purified by 3H-silica gel column chromatography {eluent: n-hexane/ethyl acetate = 9/1) to give ethyl 3-{l-isopropylpiperidin-4-yl}acrylate (6.87 g) . APCI-MS M/Z:226[M+H]*. (4) Ethyl 3-(l-isopropylpiperidin-4-yl}aerylate (1.01 g) obtained in Reference Example 134(3) is dissolved in ethanol (20 ml), thereto is added 2 N aqueous sodium hydroxide solution (4.5 ml) and the mixture is stirred at room temperature for 24 hours. To the reaction solution is added 2 N hydrochloric acid (9 ml), and the mixture is concentrated under reduced pressure, and then the resulting residue is lyophilized to give the title compound (1.43 g). APCI-MS M/Z:198 [M+H]Reference Example 135: (l-t-Butoxycarbonylpiperidin-4' yl)acetic acid (1) Ethyl (piperidin-4-yl} acetate hydrochloride obtained in Reference Example 124 (10.OO g) is suspended in tetrahydrofuran [95 ml), and thereto are added sodium hydrogen carbonate (12.14 g) and water (150 ml), and then thereto is added a solution of di-t-butyl dicarbonate (11.60 g) in tetrahydrofuran (55 ml} dropwise under ice- cooling. The reaction solution is stirred at room temperature for 20 hours, aqueous potassium carbonate solution is poured to the solution and the mixture is extracted with ethyl acetate. The organic layer is washed with saturated brine, dried over magnesium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is purified by silica gel column chromatography (eluent; n-hexane/ethyl acetate = 5/1) to give ethyl (l-t-butoxycarbonylpiperidin-4-yl}acetate (13.06 g)- APCI-MS M/Z;272[M+H]. (2) Ethyl {l-t-butoxycarbonylpiperidin-4-yl)acetate (13.00 g) obtained in Reference Example 135(1) is dissolved in tetrahydrofuran-ethanol (2:1, 180 ml) and thereto is added a solution of sodium, hydroxide (4.80 g) in water (60 ml) . The reaction solution is stirred at room temperature overnight, concentrated under reduced pressure and the resulting aqueous layer is washed with diethyl ether. The aqueous layer is acidified with 1 N hydrochloric acid under ice-cooling, and then extracted with ethyl acetate. The organic layer is washed with water and saturated brine, and then dried with magnesium sulfate. The solvent is evaporated under reduced pressure to give the title compound (11.10 g). ESI-MS M/Z-. 242[M-H]'. Reference Examples 136-137 The corresponding compounds are treated in a similar manner to Reference Example 135 to give the following compounds. dimethylformamide under argon atmosphere, and to the mixture is added dropwise triethyl phosphonoacetate (5.83 g) under ice-cooling. After stirring for 0.5 hours under the ice-cooling, --butyl 4-oxo-l-piperidinecarboxylate (4.07 g) is added dropwise to the reaction soluticn, and the mixture is warmed to room temperature and stirred for 1.5 hours. To the reaction solution is added ice-water under ice-cooling, and the precipitates are collecced by filtration and dried to give t-butyl 4- ethoxycarbonylmethylene-l-piperidinecarboxylate (3.02 g]. APCI-MS M/Z:2a7 [M+iHr. (2) t-Butyl 4-ethoxycarbonylmethylene-l-piperidinecarboxylate (1.08 g) obtained in Reference Example 138(1) is dissolved in dioxane (12 ml), thereto is added 1 N aqueous sodium hydroxide solution (8 ml) and the mixture is stirred at room temperature overnight. The reaction solution is acidified with 1 N hydrochloric acid, and then extracted with ethyl acetate. The organic layer is washed with water and saturated brine successively, dried over sodium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is purified by silica gel column chromatography (eluent: chloroform/methanol = 50/1) to give the title compound (0.72 g) . ESI'MS M/Z:240[M-H]". Reference Exa.mple 13 9; ( 4-Isopropylpipera2in-l-yl) acetic acid (1) 1-lsopropylpiperazine (1.21 g) is dissolved in acetonitrile (12 ml), thereto is added potassium carbonate (3.15 g), and then a solution of benzyl bromoacetate (2.08 g) in acetonitrile (2 ml) is added dropwise. The reaction solution is heated under reflux for one hour, after allowing to cool, the insoluble materials are removed by filtration and the filtrate is concentrated under reduced pressure. The resulting residue is purified by silica gel column chroiTiatography (eluent: chloroform/methanol = 50/1 followed by 9/1) to give benzyl (4-isopropylpiperazin-l- yDacetate (2.84 g) . APCI-MS M/2:277[M+H]". (2) Benzyl (4-isopropylpiperazin-l-yl)acetate (2.83 g) obtained in Reference Example 139(1) is dissolved in methanol (40 ml), thereto is added 10 % palladium-carbon (Q.31 g), and then the mixture is stirred for 7 hours under hydrogen atmosphere under normal pressure. The insoluble rnaterials are removed by filtration, the filtrate is concentrated under reduced pressure to give the title compound (1.82 g) . APCI-MS M/2::87 [M+H]"". Reference Example 140: 3-(4-l5opropylpiperazin-l-yDpropionic acid dihydrochloride (1) 1-Isopropylpiperazine (650 mg> is dissolved in acetonitrile {7 ml) and thereto is added t-butyl acrylate (743 yl) under ice-cooling. The reaction solution is warmed to room temperature and stirred for 4 hours, and thereto is added additional t-butyl acrylate (148 til), and then the mixture is stirred at room temperature for another 10 hours. Additional t-butyl acrylate (222 yl) is added to the reaction solution, and the mixture is stirred for 6 hours, thereto is poured water and the solution is extracted with ethyl acetate. The organic layer is washed with saturated brine, dried over sodium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is purified by silica gel coluinn chromatography (eluent: chloroform/methanol = 20/1 followed by 10/1) to give t-butyl 3-(4-isopropylpiperazin-l- yl)propionate (1.18 g). APCI-MS M/Z:257[M+H]*. (2) t-Butyl 3-(4-isopropylpipera2in-l-yl)propionate (1.15 g) obtained in Reference Example 140(1) is dissolved in dioxane (10 ml), and thereto is added 4 t3 hydrogen chloride-dioxane (25 ml) and the reaction solution is stirred at room temperature for 48 hours. The reaction solution is concentrated under reduced pressure and the resulting residue is suspended in diethyl ether. The precipitates are collected and dried to give the title compound (1.06 g) . APCI-MS M/Z:201[M+H]Reference Example 141; Trans-4-(3-oxo-morpholin-4- yi)cyclohexanecarboxylic acid Sixty % sodium hydride in oil (6.80 g) is suspended in N,N-dimethylacetamide (80 ml) and a solution of 2-benzyloxyethanol (12.9 g) in N,N-dimethylacetamide (50 ml) is added dropwise to the mixture over a period of 10 minutes under ice-cooling. After stirring at room temperature for 15 minutes, the reaction solution is cooled with ice, thereto is added chloroacetic acid (8.13 g) gradually and the mixture is stirred at room temperature for 11 hours. The reaction solution is concentrated under reduced pressure, to the resulting residue is added aqueous sodium hydrogen carbonate solution and the mixture is washed with diethyl ether. The aqueous layer is acidified with cone, hydrochloric acid, and then extracted with ethyl acetate. The organic layer is washed with saturated brine, dried over sodium sulfate and evaporated to remove solvent under reduced pressure to give (2-benzyloxyethQxy)acetic acid (18.24 g). ESI-MS M/Z:209 [K-H]\ (2) hydrochloride (5.27 g) obtained in Reference Example 113(1) and 1-hydroxybenzotriazole (5.06 g} are dissolved in N,N-dimethylformamide (100 ml). To the mixture are added 1-ethy1-3-(S-dimethylaminopropyl)carbodiimide hydrochloride (7.10 g) and triethylamine (4.50 ml) successively under ice-cooling, and the mixture is stirred at room temperature for 3 days. The reaction solution is concentrated under reduced pressure, to the resulting residue is added an aqueous sodium hydrogen carbonate solution and the mixture is extracted with ethyl acetate. The organic layer is washed with a saturated brine, dried over sodium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is purified by silica gel coluinn chromatography (eluent: hexane/ethyl acetate =1:1 followed by ethyl acetate) to give methyl trans-4-[2-(2-benzyloxyethoxy)acetylamino]cyclohexanecarboxylate (8.24 g). Methyl trans-4- [2- (2-benzyloxyethoxy) acetylaraino] - cyclchexanecarboxylate (5.09 g) obtained in (2) is dissolved in acetic acid (150 ml), and thereto is added 5 % palladium carbon (1.01 g} and the mixture is snirred for 2.4 hours under hydrogen atmosphere under normal pressure. The reaction solution is filtrated to remiove the catalyst, and then the filtrate is concentrated under reduced pressure. The resulting residue is dissolved in chloroform, washed with a saturated sodium hydrogen carbonate solution, dried over sodium sulfate and evaporated to remove the solvent to give methyl trans-4-[2-(2-hydroxyethoxy)acetylamino]cyclohexanecarboxylate (3.32 g). Methyl trans-4-[2-(2-hydrQxyethoxy)acetylamino]-cyclohexanecarboxylate (1.37 g) obtained in (3) is dissolved in chloroform (15 ml) and thereto is added triethylamine (890 pi) under ice-cooling. Then, methanesulfonyl chloride (450 yl) is added dropwise at the same teinperaiure. The reaction solution is stirred for 3 hours under ice-cooling, diluted with water and extracted with chlorofcrm. The orcanic layer is washed with saturated brine, cried over sodium sulfate and removed the solvent by evaporation under reduced pressure to give methyl trans-4-[2-(2-methanesulfonyloxyethoxy}acetylamino]- is dissolved in N,N-diinethylacetaiTiide (15 ml), thereto is added 50 % sodium hydride in oil (135 mg) under ice-cocling and the mixture is stirred for 16 hours at room temperature. To the residue obtained by concentrating the reaction solution und=r reduced pressure are added water and excess sodium chloride, and the mixture is extracted with chloroform. The organic layer is dried over sodium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is purified by silica gel column chromatography (eluent: hexane/ethyl acetate = 1:1 followed by ethyl acetate) to give methyl trans-4-{3-oxo-morpholin- carboxylate (500 mg) obtained in (5) is treated in a similar manner to Reference Example 113(4) to give the (1) Methyl trans-4-aminocyclohexanecarboxylate hydrochloride (5.00 g) obtained in Reference Example 113(1) is dissolved in chloroform (60 ml), thereto is added triethylamine (11 ml) under ice-cooling, and then a solution of 2-'Chloroethyl chloroformate {3.3 ml) in chloroform (10 ml) is added dropwise. After stirring at room temperature for 2.5 hours, to the reaction solution is added 5 % hydrochloric acid, and then the mixture is extracted with chloroform. The organic layer is washed with saturated brine, dried over sodium sulfate, and then evaporated to remove the solvent under reduced pressure. The resulting residue is suspended in chloroform- diisopropyl ether, the precipitates are collected by filtration and dried to give methyl trans-4-(2-chloro- ethyloxycarbonylamino) cyclohexanecarboxylate (5.11 g) . APCI-M3 M/Z:264/266LM+H]'. (2) Merhyl trans-4-(2-chloroethyloxycarbonylamino)- cyclohexanecartaoxylate {3.70 g) obtained in (1) is dissolved in N,N-dimethylacetamide (50 ml), thereto is added 60 % sodium hydride in oil (630 mg) under ice-cooling and the mixture is stirred at room temperature for 15.5 hours. To the reaction solution is added water, the mixture is extracted with ethyl acetate, the organic layer is washed wiih water and saturated brine, and then dried over sodium sulfate. The solvent is removed by evaporation under reduced pressure and the resulting residue is purified by silica gel column chromatography (eluent: hexane/ethyl acetate = 1/1 followed by ethyl acetate) to give methyl trans-4-(2-oxo-oxazolidin-3-yl)cyclohexanecarboxylate (1.83 g). APCI-MS M/Z:228[MH](3) Methyl trans-4-(2-oxQ-oxazolidin-3-yl)-cyclohexanecarbosylate (1,84 g) obtained in (2) is treated in a similar manner to Reference Example 113(4) to give the title compound (1.75 g) . Example 1211) is treated in a similar manner to Reference Example 113 !2) to give methyl trans-4-(4-chlorobutyrylaminomethyl) cycIohexanecar'DOxylate (5.35 g) . APCI-MS M/2:276/278[M+H]*. (2) Methyl trans-4-(4-chlorobutyrylaminomethyl)- cyclohexanecarboxylate (3.75 gj obtained in (1) is treated in a similar manner to Reference Example 113(3) to give methyl trans-4-(2-oxo-pyrrolidin-l- ylmethyl)cyclohexanecarboxylate (2.07 g). APCI-MS M/Z:240[MH](3) Methyl trans-4-(2-oxo-pyrrolidin-l-ylmeLhyl)- cyclohexanecarboxylate (2.04 g> obtained in (2) is treated in a similar manner to Reference Example 113(4) to give trans-4- {2-cxc-pyrrolidir.-l-ylmethyll cyclohexanecarboxylic (1) Methyl trans-4-(aminomethyl)cyclohexane¬carboxylate hydrochloride (5.86 g) obtained in Reference Example 121(1) is dissolved in chloroform (100 ml), thereto is added triethylamine (12 ml) under ice-cooling, and then acetyl chloride (2.69 g> is added thereto. The mixture is stirred at room temperature for one hour and 40 minutes, and water is added to the reaction solution and the mixture is extracted -iTih chlorofcrm. The organic layer is washed with 10 % hydrochloric acid, saturated brine, a sa-urated aqueous sodium hydrogen carbonate solution and saturated brine successively, dried over magnesium sulfate and evaporated to remove the solvent under reduced press-ure. The resulting residue is purified by silica gel colu--r,n chromatography (eluent: hexane/ethyl acetate = 1/1 followed by ethyl aceta::e) to give methyl trans-4-(acetylamincme-::hyl) cyclohexanecarboxylate (5.92 g) . APCI-MS M/2:214[M+K](2) Methyl trans-4-(acetylaminomethyl)cyclohexane¬ carboxylate (4.32 g) obtained in [1) is dissolved in N,N- dimethylformamide (50 ml) and thereto are added 50 % sodium hydride in cil (1.00 g), methyl iodide (5.91 g) and methanol (5 drops) successively under ice-cooling. .a.fter st:irring for 8 hours at room temperature, thereto are added additional sodium hydride (430 mg), methyl iodide (1.5 ml) and methanol (2 drops), and the mixture is stirred for 2 hours. To the reaction solution is added water, and the mixture is extracted with ethyl acetate. The organic layer is washed with water and dried over sodium sulfate. The solvent is -removed by evaporation and the resulting residue is purified by silica gel column chromatography [eluent: hexane/ethyl acetate = 1/2 followed by ethyl acetate) to give methyl ■zrans-4- [ [N-acetyl-N- methylamino)methyl]cyclohexanecarboxylate [3.04 g). APCI-MS M/Z:228[M-H]. [3) Methyl trans-4-[(N-acetyl-N-methylaminoj- methyl]cyclchexanecarboxylate [3.03g) obtained in (2) is (1) 5-Amincvaleric acid (7.35 g} is dissolved in methanol (5C ml), thereto is added dropwise thionyl chloride (4.5 ml) under ice-cooling, and the reaction solution is warmed to room temperature and stirred for 17 hours. The reaction solution is concentrated under reduced pressure, and the resulting residue is suspended in diethyl ether and the precipitates are collected by filtration to give methyl 5-aminovalerate hydrochloride (9.93 g). APCI-MS M/Z:132[M+H]*. (2) Methyl 5-aminovalerate hydrochloride (1.68 g) obtained in (1) is suspended in chloroform (20 ml). To the suspension, triethylamine (2.54 g) is added under ice- cooling, and then 4-chlorobutyryl chloride (1.55 g) is added dropwise. The reaction solution is warmed to room temperature, stirred for 2 hours, ice-water is poured to the reaction solu.ion and the mixture is extracted with chloroform. The organic layer is washed with 10 % hydrochloric acid, a saturated aqueous sodium hydrogen carbonate scluuion and saturated brine, and then dried over sodium sulfate. The resultant is evaporated to remove the solvent under reduced pressure to give methyl 5-{4-chlorobutyrylaminojpentanoate (2.34 g). APCI-M3 M/Z:236/238 [M+Hj"". (3) Methyl 5-{4~chlorobucyrylamino> pentancate [2.33 g) obtained in (2) is dissolved in N,N-dimethylacetamide {20 ml) and 60 % sodium hydride in oil (0.47 g) is added thereto gradually under ice-cooling. The reaction solution is warmed to room temperature, stirred for 20 hours and evaporated to remove the solvent under reduced pressure. The resulting residue is purified by silica gel column chromatography (eluent: chloroform followed by chloroform/ethyl acetate = 20/1) to give methyl 5-52-oxo- pyrrolidin-l-yl>pentanoate (2.15 g). APCI-MS M/Z:200[M+H]*. (4) Methyl 5-(2-oxo-pyrrolidin-l-yl> pentanoate (1.00 g) obtained in (3) is dissolved in methanol (20 ml), thereto is added 4 N aqueous sodium hydroxide solution (2.5 ml), the reaction solution is warmed to room temperature and stirred for 18 hours. The reaction solution is washed with diethyl ether, thereto is added 2 N hydrochloric acid (5.0 ml), and then concentrated under reduced pressure. The resulting residue is extracted with chloroform and dried over sodium sulfate. The resultant is evaporated to remove solv&r.t under reduced pressure to give the title compound (0.30 g). ESI-MS M/Z:184[M-H]'. Reference Example 146: Methyl 2-formyl-S-hydrcxybenzoate and methyl 4-fcrmyl-3-hydroxyben2oate Methyl 3-hydroxybenzoate (75.5 g) is dissolved in trifluoroacetic acid (2 L), thereto is added hexamethylenetetramine (141.4 g) at room temperature and the mixture is heated under reflux for 3 hours. The reaction solution is concentrated under reduced pressure, to the resulting residue is added water, the mixture is adjusted to pH 8 with potassium carbonate and sodium hydrogen carbonate, diluted with water and extrac-ed with ethyl acetate. The organic layer is washed with saturated brine, dried over sodium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is purified by silica gel column chromatography (eluent: hexane/ethyl acetate = 3/1, 5/1 followed by 2/1} to give methyl 2-formyl-3-hydroxybenzoate (54.6 g) (ESI-MS m/z: 179|:M-H]') and methyl 4-formyl-3-hydroxybenzoate (4.4 g) Methyl 4-forrayl-3-hydroxyben2oate (1.96 g) obtained in Reference £xar,pie 14 6 is dissolved in formic acid {5Q ml), thererc are added hydroxylammon.ium chloride (0.35 g) and sodiuir. forrr.ate (0.85 g) and the mixt:ure is heated under reflux for 14 hours. The reaction solution is concentrated under reduced pressure, diluted with water and ex-::racted with ethyl acetare. The organic layer is washed with saturated brine, dried over sodium sulfate and evaporated to remove the solvent under reduced pressure. The resulting residue is suspended chlorofonn/diisopropyl ether, and then the precipitates are collected by filtration to give the title compound (0.66 g). Furthermore, the filtrate is concentrated under reduced pressure and the resulting residue is purified by silica gel colurrji chromatography (eluent: hexane/ethyl acetate = 3/2) to give the title compound (1.08 g). ESI-M3 M/Z;i76[M-Hr- Reference Example 148: 2-(2-Cyano-5-tnethoxycarbonyl- Methyl 4-Gyano-3-hvdroKybenzoate (655 mg) obtained in Reference Example 147 is dissolved in acetone :20 ml), thereto are added 2-chlors~N-(5-chloropyridin-2-yl)acetamide (£97 mg) ob-amed in Reference Example 20(1), potassium carbona-e (773 rg) and sodium iodide (657 mg) and the mixture is heated under reflux for 40 minutes. The reaction solution is concentrated under reduced cressure, thereto is added water and "he mixture is extrac-::ed with ethyl acetcte-'errahycrofuran. The organic layer is washed with saturated brine, dried over sodium sulfate and evaporated to ren'iove the solvent under reduced pressure, The resulting residue is suspended in chloroform-diisopropyl ether and the precipitates are collected by filtration to give the title compound (1.16 g). APCI-MS M/Z:346/348[MH]. Reference Example 14 9: 3-Amino-6-methoxycarbonyl-N-(5- 2- {2-Cyano-5-methoxycarbonylphenoxy)-N-(5-chloropyridin-2-yl)acetamide (1.03 g) obtained in Reference Example 148 is dissolved In N,N-dimethylacetamide (10 ml), thereto is added sodium carbonate (97 mg) and the mixture is stirred at 100°C for 4 hours. The reaction solution is poured to water (50 ml) , the precipitates are collected by filtration, washed with water and ethanol and dried to give the title compound (839 mg). APCr-MS M/Z:346/348[M-rHl". Reference Ezam.pie 150: Methyl 2-cyano-3-hydroxyber-2oate room temperature, stirred for 2 hours, and then evaporated to remove methanol. The resulting residue is diluted with water and extracted with chloroform. The organic layer is dried over sodium sulfate and evaporated to remove the solvent under reduced pressure to give methyl 2-hydroxy-iminoinethyl-3-hydroxybenzoate (9.89 g) . APCI'MS M/Z:196[M+H]. (2) Methyl 2-hydroxyiminomethyl-3-hydroxyben2oate (10.57 g) obtained in (1) is suspended in chloroform [100 ml) and thereto is added triethylamine (19.35 g) under ice-cooling. At the same temperature, to the resulting solution is added dropwise trifluoroacetic anhydride (25.40 g) over a period of 30 minutes. The reaction solution is stirred at room temperature for 3 days, thereto is added an aqueous saturated sodium hydrogen carbonate solution and extracted wirh chloroform. The organic layer is cried over magnesium sulfate and evaporated to remove zhe solvent under reduced pressure. "he resulting residue is dissolved in methanol '150 ml}, thereto is added potassium carbonate {15.6 g), and the mixture is stirred at room temperature for 50 minutes. The reaction solution is diluted with water, acidified with cone, hydrochloric acid, and then e.xtracted with chloroform. The organic layer is dried over magnesium sulfate, the solvent thereof is removed by evaporation a.nd the resulting residue is suspended in ethyl acetate-diisopropyl ether. The precipitates are collected by filtration to give the title compound (8.71 g) . Methyl 2-cyano-3-hydroxybenzQate (1.70 g) obtained in Reference Example 150 is treated in a similar manner to Reference Example 148 to give the title compound {2.69 g). 3-Amino-5-methoxycarbonyl-N-(5-chloropyridin-2-yli benzof uran-2-carboxamicie (2.01 g) is suspended in tetrahydrofuran (20 ml)-methanol, thereto is added 4 N aqueous sodium hydroxide solution (5 ml) under ice-cooling and the reaction solution is stirred at room temperature for 13 hours. The reaction solution is concentrated under reduced pressure, the resulting residue is diluted with water, and the mixture is adjusted to around pH 3 by pouring 10 % hydrochloric acid. The precipitates are collected by filtration, washed with water and ethanol successively and dried to give the title compound {1.87 g). ESI-MS M/Z;330[M-H]'. Reference Examples 154-155 The ester obtained in Reference Example 149 or Reference Example 152 is treated in a similar manner to Reference Example 153 to give the following compounds. Example 153 is suspended in pyridine (15 ml), thereto are added dimethylamine hydrochloride (0.77 g), 1-hydroxy- benzotriazole [1.37 g) and l-ethyl-3-(3- dimethylaminopropyl)carbodiimide hydrochloride (1.79 g) successively under ice-cooling and the mixture is stirred at room temperature for 14 hours. The reaction solution is diluted with water {100 ml) and thereto is added saturated aqueous sodium hydrogen carbonate solution to adjust to pH 8-9. The precipitates are collected by filtraticr., washed with water and ethanol successively, and then dried to give the title compound (1.50 g). INDUSTRIAL APPLICABILITY The compound of the formula [1] or a pharmaceutically acceptable salt thereof is less toxic and safe, and has an excellent inhibitory effect on activated blood coagulation factor X. Accordingly, the said compound [1] is useful as a medicamer." for prevention and treatment of diseases caused by thrombus or embolus. WE CLAIM: 1. A benzofuran derivative of the formula [1]: wherein x is a group of the formula: -N= or the formula: -CH=; Y is an amino group optionally substituted by a group selected from the followings: (1) a piperidyl group substituted by a C1-6 alkyl group, (2) a C1-6 alkyl group, and (3) a C1-6 alkoxy carbonyl group; cycloalkyl group optionally substituted by a group selected from an amino group optionally substituted by a group selected from the fbllowings: (1) aC1-6 alkyl group, (2) a cycloalkyl group, (3) a hydroxy-C1-6 alkyl group, (4) a 1,3-dioxanyl group substituted by a C1-6alkyl group, (5) a C1-6 alkyl group substituted by an amino group optionally substituted by a group selected from (a) a C1-6 alkyl group, (b) a C1-6 alkanoyi group, (c) a C1-6 alkanoy] group substituted by an amino group substituted by a C1-6 alkyl group, and (d) a C1-6 alkoxycarbonyl group, (6) a C1-6 alky! group substituted by a cyano group, (7) a C1-6 alkyl group substituted by a C1-6 alkoxycarbonyl group, (8) a C1-6 alkyl group substituted by a carboxyl group, (9) a C1-6 alkyl group substituted by a carbamoyl group optionally substituted by a lower alkyl group, (10) a C1-6 alkyl group substituted by an aryl group, (11) a C1-6alkyl group substituted by a pyridyl group. (12) a C1-6 alkoxycarbonyl group, (13) a C1-6 alkanoyl group substituted by a di- C1-6 alkyl amino group, (14) a C1-6 alkanoyl group, (15) a pyrimidinyl group, (16) a C1-6 alkanoyl group substituted by a morphoiinyl group, (17) a C1-6alkylsulfonyl group, (18) a carbamoyl group substituted by a C1-6 alkyl group, (19) a carbonyl group substituted by an aryl group, (20) a C1-6 alkanoyl group substituted by a C1-6 alkoxy group, (21) a C1-6 alkanoyl group substituted by a C1-6 alkanoyloxy group, (22) an aryl group substituted by a hydroxyl group, and and C1-6 alkyl group optionally substituted by a group selected from the followings: (1) an oxopyrrolidinyl group, and (2) an oxomorpholinyl group, and (3) an amino group optionally substituted by a group selected from (a) a C1-6 alkyl group, (b) a C1-6 alkoxy carbonyl group, and (c) a C1-6 alkanoyl group; or saturated heterocyclic group optionally substituted by a group selected from the followings: (1) aC1-6alkyl group, (2) aC1-6 alkyl group substituted by a pyridyl group, (3) a piperidyl group substiluled by a C1-6 alkyl group, (4) a piperidyl group, (5) a piperidyl group substituted by a C1-6 alkoxy carbonyl group, (6) an unsaturated heterocyclic group selected from a pyridyl group, a pyrimidinyl group, a 4,5—dihydroxazolyl group and a thiazolyl group, (7) a C1-6 alkanoyl group. (8) aC1-6 alkanoyl group substituted by a di-C1-6 alkyl amino group, (9) a carbonyl group substituted by a pyridyl group, (10) aC1-6 alkylsulfonyl group, (11) a C1-6 alkoxycarbonyi group, (12) a C1-6alkyl group substituted by a di- C1-6 alkyl amino group, and (13) an 0X0 group; A is a single bond, a carbon chain optionally having a double bond within or at the end(s) of the chain, or an oxygen atom; R is a hydrogen atom, a halogen atom, a C1-6 alkyl group, a C1-6 alkoxy group, a cyano group or an amino group optionally substituted by a C1-6 alkyl group; is a benzene ring optionally substituted by a group(s) selected independently from a halogen atom, substituted C1-6 alkyl group optionally substituted by a group selected from the followings: (1) a C1-6alkoxycarbonyi group, (2) a carboxyl group, (3) a carbamoyl group optionally substituted by a group selected from (a) a C1-6 alkyl group, (b) a C1-6 alkoxy- C1-6 alkyl group, (c) a C1-6 alkyl group substituted by a hydroxyl group, and (d) a C1-6 alkoxy group, (4) a carbonyl group substituted by a morpholinyl group, (5) a piperidylcarbonyl group substituted by a hydroxy- C1-6 alkyl group, (6) a pyrrolidinylcarbonyl group substituted by a hydroxy- C1-6 alkyl group, (7) a carbonyl group substituted by a hydroxyl group-substituted piperidyl group, and (8) a hydroxyl group, a hydroxy group, C1-6 alkoxy group optionally substituted by a group selected from the foUowings: (1) a carboxyl group, (2) a C1-6alkoxycarbonyi group. (3) a C1-6 alkoxy group. (4) a hydroxy! group. (5) an aminooxy group optionally substituted by a C1-6alkoxycarbonyl group, (6) a C1-6 alkoxy group substituted by a C1-6alkoxy group, (7) a carbonyl group substituted by a morpholinyl group, a piperidyl group or a pyrrolidinyl group, (8) a carbonyl group substituted by a hydroxypiperidyl group, (9) a piperidylcarbonyl group substituted by a hydroxy- C1-6 alkyl group, (10) a pyrrolidinylcarbonyl group substituted by a hydroxy- C1-6 alkyl group, (11) a carbonyl group substituted by a C1-6alkyl-piperazinyl group, (12) an amino group optionally substituted by (a) a Cj-e alkyl group, (b) a C1-6 alkoxy carbonyl group, and (c) a C1-6 alkanoyl group, (13) a carbamoyl group optionally substituted by a group selected from (a) a C1-6 alkyl group, (b) a C1-6 alkoxy-lower alkyl group, (c) a C1-6alkyl group substituted by a hydroxyl group, and (d) a C1-6 alkyl group substituted by a di- C1-6 alkylamino group; and (14) a group of the formula: -0-NH-C(=NH)NH2; an oxy group substituted by saturated heterocyclic group optionally substituted by an aryl group, a carbonyl group optionally substituted by a group selected from the followings: (1) a C1-6 alkoxy group, (2) a hydroxyl group, (3) an amino group optionally substituted by (a) a C1-6 alkyl group, (b) a C1-6 alkoxy group, (c) a C1-6ft alkoxy- C1-6.6 alkyl group, (d) a hydroxy- C1-6 alkyl group, (e) a C1-6 alkyl group substituted by an amino group optionally substituted by a C1-6.6 alkyl group, (f) a C1-6alkyl group substituted by an aryl group, and (g) a C1-6alkyl group substituted by a pyridyl group. (4) a morpholinyl group, a pyrrolidinyl group, a piperidyl group or a thiomorpholinyl group, (5) a hydroxypiperidyl group, (6) a piperidyl group substituted by a hydroxy- C1-6 alkyl group, (7) a pyrrolidinyl group substituted by a hydroxy- C1-6 alkyl group, and (8) a C1-6 alkyl-piperazinyl group; an amino group optionally substituted by a group selected from the followings: (1) aC1-6alkylgroup, (2) a C1-6 alkoxy- C1-6 alkyl group, (3) a hydroxy- C1-6 alkyl group, (4) a C1-6 alkanoyl group, (5) a C1-6 alkoxy- C1-6 alkanoyl group, (6) a hydroxy- C1-6alkanoyl group, (7) a C1-6 alkanoyl group substituted by a C1-6 alkanoyloxy group, (8) a C1-6 alkanoyl group substituted by an amino group optionally substituted by a group selected from (a) a C1-6 alkyl group and (b) a C1-6 alkanoyl group, (9) a C1-6 alkoxy carbonyl group, (10) a lower alkoxy carbonyl group substituted by an aryl group, (11) a carbamoyl group substituted by a C1-6 alkyl group, (12) a C1-6 alkylsulfonyl group, and (13) a C1-6alkylsulfonyl group substituted by a morpholinyl group, nitro group, a cyano group, a 4,5-dihydroxazolyl group or a group of the formula: 2. The compound according to claim 1, wherein B is an unsubstituted benzene ring; and Y is a saturated heterocyclic group optionally substituted by a group selected from the followings: (1) aC1-6. alkyl group, (2) a C1-6 alkyl group substituted by a pyridyl group (3) a piperidy! group substituted by a C1-6 alkyl group, (4) a piperidyl group, (5) a piperidyl group substituted by a C1-6 alkoxy carbonyl group, (6) an unsaturated heterocyclic group selected from a pyridyl group, a pyrimidinyl group, a 4,5—dihydroxazolyl group and a thiazolyl group, (7) a C1-6 alkanoyl group, (8) a C1-6alkanoyl group substituted by a di-lower alkyl amino group, (9) a carbonyl group substituted by a pyridyl group, (10) a C1-6 alkyl sulfonyl group, (11) a C1-6 alkoxy carbonyl group, (12) a C1-6 alkyl group substituted by a di-lower alkyl amino group, and (13) an 0X0 group. 3. The compound according to claim 1, wherein B is an unsubstituted benzene ring; and Y is an amino group optionally substituted by a group selected from the followings: (1) a piperidyl group substituted by a C1-6 alkyl group, (2) a C1-6 alkyl group, and (3) a C1-6 alkoxycarbonyl group. 4. The compound according to claim 1, wherein B is an unsubstituted benzene ring; and Y is a cycloalkyl group optionally substituted by the followings: A) an amino group optionally substituted by the foliowings: (1) a C1-6 alkyl group, (2) a cycloalkyl group, (3) a hydroxy- C1-6 alkyl group, (4) a 1,3-dioxanyl group substituted by a C1-6 alkyl group, (5) a C1-6alkyl group substituted by an amino group optionally substituted by a group selected from (a) a C1-6 alkyl group, (b) a C1-6 alkanoyl group, (c) a C1-6alkanoyl group substituted by an amino group substituted by a lower alkyl group, and (d) a C1-6, alkoxy carbonyl group, (6) a C1-6 alkyl group substituted by a cyano group, (7) a C1-6 alkyl group substituted by a C1-6 alkoxy carbonyl group, (8) a C1-6 alkyl group substituted by a carboxyl group, (9) a C1-6alkyl group substituted by a carbamoyl group optionally substituted by a C) alkyl group, (10) a C1-6 alkyl group substituted by an aryl group, (11) a C1-6alkyl group substituted by a pyridyl group, (12) a C1-6alkoxycarbonyl group, (13) a C1-6 alkanoyl group substituted by a di- C1-6 alkyl amino group, (14) a C1-6alkanoyl group, (15) a pyrimidinyl group, (16) a C1-6 alkanoyl group substituted by a morpholinyl group, (17) a C1-6alkylsulfonyl group, (18) a carbamoyl group substituted by a C1-6 alkyl group, (19) a carbonyl group substituted by an aryl group, (20) a C1-6 alkanoyl group substituted by a C1-6 alkoxy group, (21) a C1-6 alkanoyl group substituted by a C1-6alkanoyloxy group, (22) an aryl group substituted by a hydroxy group, and (23) a hydroxy- C1-6 alkanoyl group; B) a group of a formula selected from the formulas: (1) an oxopyrrolidinyl group, (2) an oxomorpholinyl group, and (3) an amino group optionally substituted by (a) a C1-6 alkyl group, (b) a C1-6alkoxy carbonyl group, and (c) a C1-6 alkanoyl group. 5. The compound according to claim 1, wherein Ring B is a benzene ring substituted by a C1-6 alkyl group optionally substituted by a group selected from the followings: (1) a C1-6alkoxycarbonyl group, (2) a carboxyl group, (3) a carbamoyl group optionally substituted by a group selected from (a) a C1-6 alkyl group, (b) a C1-6 alkoxy- C1-6 alkyl group, (c) a C1-6 alkyl group substituted by a hydroxyl group, and (d) a C1-6 alkoxy group, (4) a carbonyl group substituted by a morpholinyl group, (5) a piperidylcarbonyl group substituted by a hydroxy- C1-6 alkyl group, (6) a pyrrolidinylcarbonyl group substituted by a hydroxy- C1-6 alkyl group, (7) a carbonyl group substituted by a hydroxyl group-substituted piperidyl group, and (8) a hydroxyl group; and Y is a saturated heterocyclic group optionally substituted by a group selected from the followings: (1) a C1-6 alkyl group, (2) a C1-6 alkyl group substituted by a pyridyl group (3) a piperidyl group substituted by a C1-6 alkyl group, (4) a piperidyl group. (5) a piperidyl group substituted by a C1-6 alkoxycarbonyl group, (6) an unsaturated heterocyclic group selected from a pyridyl group, a pyrimidinyl group, a 4,5—dihydroxaolyl group and a thiazolyl group, (7) a C1-6 aikanoyl group, (8) a C1-6 aikanoyl group substituted by a di- C1-6 alkylamino group, (9) a carbonyl group substituted by a pyridyl group, (10) a C1-6 alkylsulfonyl group, {11) a C1-6alkoxycarbonyl group, (12) a C1-6 alkyl group substituted by a di-C1-6. alkylamino group, and (13) an oxo group. 6. The compound according to claim 3, wherein Ring B is a benzene ring substituted by a C1-6 alkyl group optionally substituted by a group selected from the foliowings: (1) a C1-6 alkoxycarbonyl group, (2) a carboxyl group, (3) a carbamoyl group optionally substituted by a group selected from (a) a C1-6 alkyl group, (b) a C1-6, alkoxy- C1-6 alkyl group, (c) a C1-6 alkyl group substituted by a hydroxyl group, and (d) a C1-6 alkoxy group, (4) a carbonyl group substituted by a morpholinyl group, (5) a piperidylcarbonyi group substituted by a hydroxy- C1-6 alkyl group, (6) a pyrrolidinylcarbonyl group substituted by a hydroxy- C1-6 alkyl group, (7) a carbonyl group substituted by a hydroxyl group-substituted piperidyl group, and (8) a hydroxyl group; and Y is an amino group optionally substituted by a group selected from the foliowings: (1) a piperidyl group substituted by a lower alkyl group, (2) a C1-6 alkyl group, and (3) a C1-6 alkoxycarbonyl group. 7. The compound according to claim 1, wherein Ring B is a benzene ring substituted by a lower alkyl group optionally substituted by a group selected from the follow ings; (1) a C|_e alkoxycarbonyl group, (2) a carboxyl group, (3) a carbamoyl group optionally substituted by a group selected from (a) a C1-6. alkyl group, (b) a C1-6alkoxy- C1-6, alkyl group, (c) a C1-6.6 alkyl group substituted by a hydroxyl group, and (d) a C1-6 alkoxy group, (4) a carbonyl group substituted by a morphoHnyl group, (5) a piperidylcarbonyl group substituted by a hydroxy- C1-6 alkyl group, (6) a pyrrolidinylcarbonyl group substituted by a hydroxy- C1-6alkyl group, (7) a carbonyl group substituted by a hydroxyl group-substituted piperidyl group, and (8) a hydroxyl group; and Y is a cycloalkyl group optionally substituted by the followings: A) an amino group optionally substituted by the followings; (1) a C1-6 alkyl group, (2) a cycloalkyl group, (3) a hydroxy- C1-6 alkyl group, (4) a 1,3-dioxanyl group substituted by a C1-6. alkyl group, (5) a C1-6alkyl group substituted by an amino group optionally substituted by a group selected from (a) a C1-6 alkyl group, (b) a C1-6 alkanoyl group, (c) a C1-6 alkanoyl group substituted by an amino group substituted by a C [.6 alkyl group, and (d) a C1-6 alkoxycarbonyl group, (6) a C1-6 alkyl group substituted by a cyano group, (7) a C1-6alkyl group substituted by a €,-6 alkoxycarbonyl group, (8) a C1-6alkyl group substituted by a carboxyl group, (9) a C1-6 alkyl group substituted by a carbamoyl group optionally substituted by a C1-6 alkyl group, (10) a C1-6 alkyl group substituted by an aryl group, (11) a C1-6 alkyl group substituted by a pyridyl group. (12) a Ci.t, alkoxycarbonyl group, (13) a C1-6 alkanoyl group substituted by a di- d. alkyl amino group, (14) a C1-6 alkanoyl group, (15) a pyrimidinyl group, (16) a €]_.(, alkanoyl group substituted by a morphoUnyl group, (17) a C ] .6 alkylsulfonyl group, (18) a carbamoyl group substituted by a C1-6alkyl group, (19) a carbonyl group substituted by an aiyl group, (20) a C1-6 alkanoyl group substituted by a C1-6 alkoxy group, (21) a C1-6_5 alkanoyl group substituted by a C1-6alkanoyloxy group, (22) an aryl group substituted by a hydroxy group, and C) a C|.|i alkyl group optionally substituted by a group selected from the followings: (1) an oxopyrrolidinyl group, (2) an oxomorpholinyl group, and (3) an amino group optionally substituted by (a) a C1-6 alkyl group, (b) a C1-6 alkoxy carbonyl group, and (c) a CN6 alkanoyl group. 8. The compound according to claim 3, wherein Ring B is a benzene ring substituted by a C (1) a carboxyl group, (2) a C1-6 alkoxycarbonyl group, (3) a C1-6 alkoxy group, (4) a hydroxyl group. (5) an aminooxy group optionally substituted by a C1-6alkoxycarbonyl group. ■6 (6) a C1-6alkoxy group substituted by a CL alkoxy group, (7) a carbonyl group substituted by a morpholinyl group, a piperidyl group or a pyrrolidinyl group, (8) a carbonyl group substituted by a hydroxypiperidyl group, (9) a piperidylcarbonyl group substituted by a hydroxy- C1-6alky! group, (10) a pyrrolidinylcarbonyl group substituted by a hydroxy- C1-6 alkyl group, (11) a carbonyl group substituted by a C1-6 alkyl-piperazinyl group, (12) an amino group optionally substituted by (a) a C1-6 alkyl group, (b) a C|_ alkoxycarbonyl group, and (c) a C]_g alkanoyl group, (13) a carbamoyl group optionally substituted by a group selected from (a) a C1-6 alkyl group, (b) a C1-6 alkoxy- C1-6 alkyl group, (c) a C1-6 alkyl group substituted by a hydroxyl group, and (d) a C;_5 alkyl group substituted by a di- C1-6 alkylamino group; and (14) a group of the formula: -0-NH-C(=NH)NH2; and Y is a saturated heterocyclic group optionally substituted by a group selected from the followings: (1) a C1-6 alkyl group, (2) a C1-6alkyl group substituted by a pyridyl group (3) a piperidyl group substituted by a C1-6 alkyl group, (4) a piperidyl group, (5) a piperidyl group substituted by a C1-6 alkoxycarbonyl group, (6) an unsaturated heterocyclic group selected from a pyridyl group, a pyrimidinyl group, a 4,5—dihydroxaolyl group and a thiazolyl group, (7) a C1-6 alkanoyl group, (8) a C1-6 alkanoyl group substituted by a di- C1-6 alkylamino group, (9) a carbonyl group substituted by a pyridyl group, (10) a C1-6 alkylsulfonyl group, (11) a C1-6 alkoxycarbonyl group. (12) a C1-6 alkyl group substituted by adi- C1-6 alkylamino group, and (13) an 0X0 group. 9. The compound according to claim 3, wherein Ring B is a benzene ring substituted by a C1-6 alkoxy group optionally substituted by a group selected from the folio wings: (1) a carboxyl group, (2) a C1-6 alkoxycarbonyl group, (3) a C1-6 alkoxy group, (4) a hydroxyl group, (5) an aminooxy group optionally substituted by a C1-6 alkoxycarbonyl group, (6) a C1-6.6 alkoxy group substituted by a C1-6 alkoxy group, (7) a carbonyl group substituted by a morpholinyl group, a piperidyl group or a pyrrolidinyl group, (8) a carbonyl group substituted by a hydroxypiperidyl group, (9) a piperidylcarbonyl group substituted by a hydroxy- C1-6 alkyl group, (10) a pyrroiidinylcarbonyl group substituted by a hydroxy- C1-6 alkyl group, (11) a carbonyl group substituted by a C;.;, alkyl-piperazinyl group, (12) an amino group optionally substituted by (a) a C1-6 alkyl group, (b) a C1-6 alkoxycarbonyl group, and (c) a C i . alkanoyl group, (13) a carbamoyl group optionally substituted by a group selected from (a) a C1-6alkyl group, (b) a C1-6 alkoxy- C1-6 alkyl group, (c) a C1-6 alkyl group substituted by a hydroxy! group, and (d) a C1-6 alkyl group substituted by a di- C1-6 alkylamino group; and (14) a group of the formula: -0-NH-C(=NH)NH2; and Y is an amino group optionally substituted by a group selected from the fallowings: (1) a piperidyl group substituted by a C1-6 alkyl group, (2) a C1-6 alkyl group, and (3) a C1-6 alkoxycarbonyl group. 10. The compound according to claim 1, wherein Ring B is a benzene ring substituted by a C1-6 alkoxy group optionally substituted by a group selected from the folio wings: (I) a carboxyl group, (2) a C1-6 alkoxy carbonyl group. (3) a C1-6 alkoxy group, (4) a hydroxyl group, (5) an aminooxy group optionally substituted by a C1-6 alkoxy carbonyl group, (6) a C1-6alkoxy group substituted by a C1-6 alkoxy group, (7) a carbonyl group substituted by a morpholinyl group, a piperidyl group or a pyrrolidinyl group, (8) a carbonyl group substituted by a hydroxypiperidyl group, (9) a piperidylcarbony! group substituted by a hydroxy- C1-6 alkyl group, (10) a pyrrolidinylcarbonyI group substituted by a hydroxy- C1-6 alkyl group, (11) a carbonyl group substituted by a C1-6alkyl-piperazinyl group, (12) an amino group optionally substituted by (a) a C1-6 alkyl group, (b) a C1-6 alkoxycarbonyl group, and (c) a C1-6 alkanoyl group, (13) a carbamoyl group optionally substituted by a group selected from (a) a C1-6 alkyl group, (b) a C1-6 alkoxy- C1-6 alkyl group, (c) a C1-6 alkyl group substituted by a hydroxy! group, and (d) a C1-6 alkyl group substituted by a di- C1-6alkylamino group; and (14) a group of the formula: -0-NH-C(=NH)NH2; and Y is a cycloalkyl group optionally substituted by the followings: A) an amino group optionally substituted by the followings: (1) a C1-6 alkyl group, (2) a cycloalkyl group, (3) a hydroxy- C1-6 alkyl group, (4) a 1,3-dioxanyl group substituted by a C1-6 alkyl group, (5) a C1-6 alkyl group substituted by an amino group optionally substituted by a group selected from (a) a C1-6 alkyl group, (b) a C1-6 alkanoyl group, (c) a C1-6 alkanoyl group substituted by an amino group substituted by a C1-6alkyl group, and (d) a C].s alkoxycarbonyl group, (6) a C1-6 alkyl group substituted by a cyano group, (7) a C1-6 alkyl group substituted by a C|_fi alkoxycarbonyl group, (8) a C1-6 alkyl group substituted by a carboxyl group. (9) a C1-6 alkyl group substituted by a carbamoyl group optionally substituted by a C1-6alkyl group, (10) a C1-6 alkyl group substituted by an aryl group, (11) a C1-6 alkyl group substituted by apyridyl group, (12) a C1-6 alkoxy carbonyl group, (13) a C1-6alkanoyl group substituted by a di- C1-6alkyl amino group, (14) a C1-6alkanoyl group, (15) a pyrimidinyl group, (16) a C1-6 alkanoyl group substituted by a morpholinyl group, (17) a C[.6 alkylsulfonyl group, (18) a carbamoyl group substituted by a C1-6alkyl group, (19) a carbonyl group substituted by an aryl group, (20) a C1-6 alkanoyl group substituted by a C1-6 alkoxy group, (21) a C1-6 alkanoyl group substituted by a C|,5 alkanoyloxy group, (22) an aryl group substituted by a hydroxy group, and (23) a hydroxy- C1-6 alkanoyl group; that is optionally substituted by an oxo group; or C) a C1-6 alkyl group optionally substituted by a group selected from the foUowings'. (1) an oxopyrrolidinyl group, (2) an oxomorpholinyl group, and (3) an amino group optionally substituted by (a) a C1-6alkyl group, (b) a C1-6 alkoxycarbonyl group, and (c) a lower alkanoyl group. 11. The compound according to claim 3, wherein Ring B is a benzene ring substituted by a carbonyl group substituted by a group selected from the followings: (1) a C1-6 alkoxy group. (2) a hydroxyl group, (3) an amino group optionally substituted by (a) a C1-6 alkyl group, (b) a C1-6.s alkoxy group, (c) a C1-6.f. alkoxy- d. alkyl group, (d) a hydroxy- C1-6 alkyl group, (e) a C1-6.6 alkyl group substituted by an amino group optionally substituted by a Ce alkyl group, (f) a C1-6 alkyl group substituted by an aryl group, and (g) a C1-6 alkyl group substituted by a pyridyl group, (4) a morpholinyl group, a pyrrolidinyl group, a piperidyl group or a thiomorpholinyl group, (5) a hydroxypiperidyl group, (6) a piperidyl group substituted by a hydroxy- C1-6 alkyl group, (7) a pyrrolidinyl group substituted by a hydroxy- C1-6 alkyl group, and (8) a C1-6 alkyl-piperazinyl group; and Y is a saturated heterocyclic group optionally substituted by a group selected from the followings: (1) a C1-6 alkyl group, (2) a C1-6 alkyl group substituted by a pyridyl group (3) a piperidyl group substituted by a C1-6 alkyl group, (4) a piperidyl group, (5) a piperidyl group substituted by a C1-6_fi alkoxy carbonyl group, (6) an imsaturated heterocyclic group selected from a pyridyl group, a pyrimidinyl group, a 4,5—dihydroxaolyl group and a thiazolyl group, (7) a C1-6alkanoyl group, (8) a C1-6alkanoyl group substituted by a di- C1-6alkyl amino group, (9) a carbonyl group substituted by a pyridyl group, (10) a C1-6 alkytsulfonyl group. (11) a C1-6 alkoxy carbonyl group, (12) a C1-6, alkyl group substituted by a di- C1-6 alkyl amino group, and (13) an 0X0 group. 12. The compound according to claim 1, wherein Ring B is a benzene ring substituted by a carbonyl group substituted by a group selected from the followings: (1) a lower alkoxy group, (2) a hydroxy] group. (3) an amino group optionally substituted by (a) a C1-6 alkyl group, (b) a C1-6 alkoxy group, (c) a C1-6.6 alkoxy- C1-6 alkyl group, (d) a hydroxy- C1-6 alkyl group, (e) a C1-6 alkyl group substituted by an amino group optionally substituted by a C1-6 alkyl group, (f) a C1-6 alkyl group substituted by an aryl group, and (g) a C1-6alkyi group substituted by a pyridyl group, (4) a morpholinyl group, a pyrrolidinyl group, a piperidyl group or a thiomorpholinyl group, (5) a hydroxypiperidyl group. (6) a piperidyl group substituted by a hydroxy- C1-6 alkyl group, (7) a pyrrolidinyl group substituted by a hydroxy- C1-6alkyl group, and (8) a C1-6 alkyl-piperazinyl group; and Y is an amino group optionally substituted by a group selected from the followings: (1) a piperidyl group substituted by a Cy. alkyl group, (2) a C1-6 alkyl group, and (3) aC1-6 alkoxycarbonyl group. 13. The compound according to claim 3, wherein Ring B is a benzene ring substituted by a carbonyl group substituted by a group selected from the followings: (1) a C1-6 alkoxy group, (2) a hydroxyl group, (3) an amino group optionally substituted by (a) a C1-6alkyl group, (b) a C1-6 alkoxy group, (c) a Ct-6 alkoxy- Cs alkyl group, (d) a hydroxy- C1-6 alkyl group, (e) a C1-6 alkyl group substituted by an amino group optionally substituted by a C1-6alkyl group, (f) a C1-6alky' group substituted by an aryl group, and (g) a C1-6 alkyl group substituted by a pyridyl group, (4) a morpholinyl group, a pyrrolidinyl group, a piperidyl group or a thiomorpholinyl group, (5) a hydroxypiperidyl group, (6) a piperidyl group substituted by a hydroxy- C1-6 alkyl group. (7) a pyrrolidinyl group substituted by a hydroxy- C1-6 alkyl group, and (8) a C[_5 alkyl-piperazinyt group; and Y is a cycloalkyl group optionally substituted by the followings: A) an amino group optionally substituted by the followings: (1) aC1-6 alkyl group, (2) a cycloalkyl group, (3) a hydroxy-CI _6 alkyl group, (4) a 1,3-dioxanyI group substituted by a C1-6 alkyl group, (5) a C1-6 alkyl group substituted by an amino group optionally substituted by a group selected from (a) a Ci.t, alkyl group, (b) a C1-6 alkanoyl group, (c) a C1-6 alkanoyl group substituted by an amino group substituted by a C1-6 alkyl group, and (d) a C1-6 alkoxycarbonyl group, (6) a C1-6 alkyl group substituted by a cyano group, (7) a Cut alkyl group substituted by a C1-6 alkoxycarbonyl group, (8) a C1-6alkyl group substituted by a carboxyl group, (9) a C1-6alkyl group substituted by a carbamoyl group optionally substituted by a C1-6 alkyl group. (10) a C1-6 alkyl group substituted by an aryl group, (11) a C1-6 alkyl group substituted by a pyridyl group, (12) a C1-6 alkoxycarbonyl group, (13) a C1-6 alkanoyl group substituted by a di- C1-6 alkyl amino group, (14) a C1-6 alkanoyl group, (15) a pyrimidinyl group, (16) a C1-6 alkanoyl group substituted by a morpholinyl group, (17) a C1-6 alkylsulfonyl group, (18) a carbamoyl group substituted by a C1-6 alkyl group, (19) a carbonyl group substituted by an aryl group, (20) a C1-6 alkanoyl group substituted by a C1-6 alkoxy group, (21) a Ci.(i alkanoyl group substituted by a Ce alkanoyl oxy group, (22) an aryl group substituted by a hydroxy group, and (23) a hydroxy- C1-6 alkanoyl group; that is optionally substituted by an oxo group; or C) a C1-6 alkyl group optioaally substituted by a group selected from the folio wings: (1) an oxopyrrolidinyl group, (2) an oxomorpholinyt group, and (3) an amino group optionally substituted by (a) a C1-6 alkyl group, (b) a C1-6 alkoxy carbonyl group, and (c) a C1-6 alkanoyl group. 14. The compound according to any one of claims I, 2, 3, 4, 7, 10 andl3, wherein the saturated heterocyclic ring is a saturated 4- to 7-membered heterocyclic group containing 1 to 4 hetero atoms selected independently from the group consisting of nitrogen atom, oxygen atom and sulfur atom. 15. The compound according to any one of claims 1, 2, 3, 4, 7, 10 and 13, wherein the saturated heterocyclic group is imidazolidinyl, piperazolidinyl, piperidyl, piperazinyl, morpholinyl. thiomorpholinyl, homopiperazinyl, homopiperidyl, pyrroiidinyl, oxazoiidinyi or 1,3-dioxanyl. R is a group selected from the followings-. A) a hydrogen atom, B) a C1-6alkyl group optionally substituted by a group selected from the followings; (1) a C1-6 alkoxycarbonyl group, (2) a carboxyl group, (3) a carbamoyl group optionally substituted by a group selected from (a) a C1-6 alkyl group, (b) a C1-6 alkoxy- C1-6 alkyl group, (c) a C1-6 alkyl group substituted by a hydroxyl group, and (d) a C1-6 alkoxy group, (4) a carbonyl group substituted by a morpholinyl group, (5) a piperidylcarbonyl group substituted by a hydroxy- C1-6 alkyl group, (6) a pyrrolidinylcarbonyl group substituted by a hydroxy- C1-6 alkyl group, (7) a carbonyl group substituted by a hydroxyl group-substituted piperidyl group, and (8) a hydroxyl group; C) a C1-6 alkoxy group optionally substituted by a group selected from the followings: (1) a carboxyl group, (2) a C1-6alkoxycarbonyl group, (3) a C1-6 alkoxy group, (4) a hydroxyl group, (5) an aminooxy group optionally substituted by a C1-6 alkoxycarbonyl group, (6) a C1-6 alkoxy group substituted by a C1-6 alkoxy group. (7) a carbonyl group substituted by a morpholinyl group, a piperidyl group or a pyrrolidinyl group, (8) a carbonyl group substituted by a hydroxypiperidyi group, (9) a piperidylcarbonyj group substituted by a hydroxy- C1-6 alkyl group, (10) a pyrrolidinylcarbonyl group substituted by a hydroxy- C1-6 alkyl group, (11) a carbonyl group substituted by a C1-6 alkyl-piperazinyl group, (12) an amino group optionally substituted by a group selected from (a) a C1-6 alkyl group,(b) a C1-6 alkoxycarbonyl group, and(c)a C1-6 alkanoyl group, (13) a carbamoyl group optionally substituted by a group selected from (a) a C1-6 alkyl group, (b) a C1-6 alkoxy- C1-6 alkyl group, (c) a C1-6 alkyl group substituted by a hydroxyl group, and (d) a C1-6 alkyl group substituted by a di- C1-6 alkylamino group, and (14) a group of the formula: -0-NH-C(=NH)NH2; or D) a carbonyl group substituted by a group selected from the followings: (1) a C1-6 alkoxy group, (2) a hydroxyl group. (3) an amino group optionally substituted by a group selected from (a)a C1-6 alkyl group, (b) a C1-6 alkoxy group, (c) a C1-6 alkoxy- C1-6 alkyl group, (d) a hydroxy- C1-6 alkyl group, (e) a C1-6 alkyl group substituted by an amino group optionally substituted by a C1-6 alkyl group, (f)a C1-6 alkyl group substituted by an aryl group, and (g) a C1-6 alkyl group substituted by a pyridyl group, (4) a morpholinyl group, a pyrrolidinyl group, a piperidyl group or a thiomorpholinyl group, (5) a hydroxypiperidyi group, (6) a piperidyl group substituted by a hydroxy- C1-6 alkyl group, (7) a pyrrolidinyl group substituted by a hydroxy- C1-6 alkyl group, and (8) a C1-6 alkyl-piperazinyl group; A is a single bond; and R2 is a hydrogen atom. 17. The compound according to claim 18, wherein Y is a group selected from the foUowings: (1) a piperidyl group substituted by a C1-6 alkyl group, (2) a cycloalkyl group substituted by an amino group optionally substituted by a group selected from (a) a C1-6 alkyl group, (b) a C1-6alkoxycarbonyl group, and (c) a that is optionally substituted by an oxo group, (4) a cycloalkyl group substituted by an amino group substituted by a C1-6 alkyl group substituted by an amino group optionally substituted by a group selected from (a) a C1-6 alkanoyl group and (b) a C1-6 alkoxycarbonyl group, and (5) a cycloalkyl group substituted by a C1-6 alkyl group substituted by an amino group optionally substituted by a C1-6 alkyl group; and R is a group selected from the followings; (1) a hydrogen atom, (2) a cyano group, (3) an amino group optionally substituted by a C1-6 alkyl group, (4) a hydroxyl group, (5) aC1-6alkoxygroup, (6) a C1-6 alkoxy group substituted by a C1-6 alkoxy group, (7) a C1-6 alkoxy group substituted by a hydroxyl group, (8) a C1-6alkoxy group substituted by an amino group optionally substituted by a C1-6 alkyl group, (9) a C1-6 alkoxycarbonyl group. (10) a carboxyl group, (11) an aminocarbonyl group optionally substituted by a group selected from (a)C1-6 alkyl group, and (b) a hydroxy- C1-6 alkyl group, (12) a morpholinylcarbonyl group, a pyrroiidinyicarbonyl group, a piperidylcarbonyl group or a thiomorpholinylcarbonyl group, (13) a piperidylcarbonyl group substituted by a hydroxy- C1-6 alkyl group or a pyrroiidinyicarbonyi group substituted by a hydroxy- C1-6alkyl group, (14) a C1-6 alkyl group, (15) a C1-6 alkyl group substituted by a C1-6 alkoxycarbonyl group, (16) a carboxy- C1-6 alkyl group, (17) a C1-6alkyl group substituted by a carbamoyl group optionally substituted by a group selected from (a) C1-6 alkyl group and (b) a hydroxy- C1-6alkyl group, (18) a C1-6 alkyl group substituted by a morpholinylcarbonyi group, (19) a C1-6 alkyl group substituted by a piperidylcarbonyl group substituted by a hydroxy- C1-6 alkyl group, or a C1-6 alkyl group substituted by a pyrroiidinyicarbonyi group substituted by a hydroxy- C1-6 alkyl group, or (20) a hydroxy- C1-6 alkyl group. that is optionally substituted by an oxo group, or a cycloatkyl group substituted by an amino group optionally substituted by a group selected from (a) a C1-6alkyl group and (b) a C1-6 alkanoyl group; and R2 is a group selected from the followings: (1) a hydrogen atom, (2) an amino group-substituted carbonyl group optionally substituted by a group selected from (a) a C1-6 alkyl group and (b) a C1-6 alkoxy- C1-6 alkyl group, (3) a C1-6 alkoxycarbonyl group, (4) a morpholinylcarbonyi group, a pyrroiidinyicarbonyi group, a piperidylcarbonyl group or a thiomorpholinylcarbonyl group. (5) a C1-6 alkyt group substituted by a C1-6 alkyl group-substituted carbamoyl group, (6) a carboxy- C1-6 alkyl group, (7) a C1-6 alkyl group substituted by a morpholinylcarbonyl group, and (8) a hydroxy- C1-6 alkyl group. 19. The compound according to claim 18, wherein Y is a cycloalkyi group substituted by an oxopyrrolidinyl group, a cycloalkyi group substituted by an oxomorpholinyi group or a cycloalkyi group substituted by an amino group optionally substituted by a group selected from (a) a C1-6 alkyl group and (b) a C1-6 alkanoyl group; and R is a group selected from the followings: {1) a hydrogen atom, (2) a hydroxy- C1-6 alkyl group, (3) a carboxy- C1-6 alkyl group, (4) a C1-6 alkoxy group substituted by a C1-6 alkoxy group, or (5) a carbonyl group substituted by a group selected from (a) an amino group optionally substituted by a C1-6 alkyl group and (b) a morpholinyl group. 20. The compound according to claim 18, wherein Y is a group selected from the followings: (1) a cycloalkyi group substituted by an amino group substituted by an C1-6 alkyl group having 1 to 3 carbon atoms, (2) a cycloalkyi group substituted by an amino group substituted by an C1-6 alkanoyl group having 1 to 2 carbon atoms, (3) a cycloalkyi group substituted by a pyrrolidin-1-yl group optionally substituted by an 0x0 group, (4) a cycloalkyi group substituted by a piperidin-1-yl group optionally substituted by an 0x0 group, (5) a cycloalkyi group substituted by a morpholin-4-yl group optionally substituted by an 0x0 group. (6) a cycloalkyl group substituted by a C1-6 alkyl group substituted by an amino group substituted by a lower alkyl group having 1 to 3 carbon atoms, or (7) a cycloalkyi group substituted by a C1-6 alkyl group substituted by an amino group substituted by a C1-6 alkanoyl group having 1 to 2 carbon atoms. 21. A compound selected from trans-5-Dimethylaminocarbonyl-3-[4-(N-formyI-N-methylamino)cyclohexylcarbonylamino]-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide; trans-3-[4-(N-acetyl-N-methylamino)cyclohexylcarbonylamino]-5-(2-hydroxyethyl)-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide; trans-5-(morpholine-4-ylcarbonyl)-3-[4-(2-oxo-pyrroridin-l-yl)cyclohexylcarbonylamino]-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide; and trans-3-(4-dimethylaminocyc]ohexylcarbonylamino)-N-(5-chloropyridin-2-yf) benzofuran-2-carboxamide, or a pharmaceutically acceptable salt thereof. 23. A pharmaceutical composition for treatment of thrombosis, which comprises as an active ingredient a compound according to any one of claims I to 15 or 18 to 22, or a pharmaceutically acceptable salt thereof.

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