Indian Patents
Title of Invention

"NOVEL PIPERIDINE DERIVATIVE"
Abstract I'he present invention provides a compound of a formula (I) wherein the variables are defined herein; to a process for preparing such a compound; and to the use of such a compound in the treatment of a chemokine (such as CCR3) or H1 mediated disease state.
Full Text The C-X-C chemokines include several potent chemoattractants and activators of neutrophils such as interleukin-8 (IL-8) and neutrophil-activating peptide 2 (NAP-2).
The C-C chemokines include potent chemoattractants of monocytes and lymphocytes but not neutrophils such as human monocyte chemotactic proteins 1-3 (MCP-1, MCP-2 and MCP-3), RANTES (Regulated on Activation, Normal T Expressed and Secreted), eotaxin and the macrophage inflammatory proteins la and 1(3 (MlP-lαand MIP-1ß).
Studies have demonstrated that the actions of the chemokines are mediated by subfamilies of G protein-coupled receptors, among which are the receptors designated CCR1, CCR2, CCR2A, CCR2B, CCR3, CCR4, CCR5, CCR6, CCR7, CCR8, CCR9, CCR10, CXCR1, CXCR2, CXCR3 and CXCR4. These receptors represent good targets for drug development since agents which modulate these receptors would be useful in the treatment of disorders and diseases such as those mentioned above.
Viral infections are known to cause lung inflammation. It has been shown experimentally that the common cold increases mucosal output of eotaxin in the airways. Instillation of eotaxin into the nose can mimic some of the signs and symptoms of a common cold. (See, Greiff L et al Allergy (1999) 54(11) 1204-8 [Experimental common cold increase mucosal output of eotaxin in atopic individuals] and Kawaguchi M et al Int. Arch. Allergy Immunol. (2000) 122 SI 44 [Expression of eotaxin by normal airway epithelial cells after virus A infection].)
The present invention provides a compound of formula (I):
(Formula Removed)
wherein:
Ra and Rb are, independently, hydrogen or C1-4 alkyl or Ra forms part of a ring as defined below;
Rc is hydrogen or hydroxy; X is CH2, C(0), O, S, S(O), S(O)2 or NR3; Z is CHRd(CH2)n; n is 0or 1;
Rd is hydrogen, C1-4 alkyl, hydroxy or C1-4 alkoxy; R1 is hydrogen, C1-6 alkyl, aryl or heterocyclyl; R2 is aryl or heterocyclyl;
wherein, unless stated otherwise, the foregoing aryl and heterocyclyl moieties are optionally substituted by: halogen, cyano, nitro, hydroxy, oxo, S(O)PR4, OC(0)NR5R6, NR7R8, NR9C(0)R10, NR11C(O)NR12R13, S(O)2NR14R15, NR16S(O)2R17, C(O)NR18R19, C^R20, CO2R21, NR22CO2R23, C1-6 alkyl, CF3, C1-6 alkoxy(C1-6)alkyl, C1-6alkoxy, OCF3, C1-6 alkoxy(C1-6)alkoxy, C1-6 alkylthio, C2-6 alkenyl, C2-6 alkynyl, C3-10 cycloalkyl (itself optionally substituted by C1-4 alkyl or oxo), methylenedioxy, difluoromethylenedioxy, phenyl, pheny](C1-4)alkyl, phenoxy, phenylthio, phenyl(C1-4)alkoxy, heterocyclyl, heterocyclyl(C1-4)alkyl, heterocyclyloxy or heterocyclyl(C1-4)alkoxy; wherein any of the immediately foregoing phenyl and heterocyclyl moieties are optionally substituted with halogen, hydroxy, nitro, S(0)q(C1-4 alkyl), S(O)2NH2, S(O)2NH(C1-4 alkyl), S(O)2N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 below), cyano, C1-4 alkyl, CM alkoxy, C(0)NH2, C(O)NH(C1-4 alkyl), C(O)N(C1-4alkyl)2(and these alkyl groups may join to form a ring as described for R5 and R6 below), CO2H, C02(C1-4 alkyl), NHC(0)(C14 alkyl), NHS(O)2(C1-4 alkyl), C(O)(C1-4alkyl), CF3 or OCF3; or Z, R2 and Ra together with the carbon atom to which Z and Ra are attached form a ring; p and q are, independently, 0,1 or 2;
R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R18, R19, R20, R21 and R22 are, independently, hydrogen, C1-4 alkyl (optionally substituted by halogen, hydroxy or C3-10 cycloalkyl), CH2(C2-6 alkenyl), phenyl (itself optionally substituted by halogen, hydroxy, nitro, NH2, NH(C1-4 alkyl), N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for Rs and R6 below), S(O)2(C1-4 alkyl), S(O)2NH2, S(O)2NH(C1.4 alkyl), S(O)2N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 below), cyano, C1-4 alkyl, C1-4 alkoxy, C(0)NH2, C(0)NH(C1-4 alkyl), C(0)N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 below), CO2H C02(C1-4 alkyl), NHC(O)(C1-4 alkyl), NHS(0)2(C1-4 alkyl), C(O)(C1-4 alkyl), CF3 or OCF3) or heterocyclyl (itself optionally substituted by halogen, hydroxy, nitro, NH2, NH(C1-4 alkyl), N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 below), S(O)2(C1-4 alkyl), S(O)2NH2, S(O)2NH(C1-4alkyl), S(O)2N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 below, cyano, C1-4 alkyl, C1-4 alkoxy, C(0)NH2, C(O)NH(C1-4alkyl), C(O)N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 below), CO2H,
C02(C1-4 alkyl), NHC(0)(C1-4 alkyl), NHS(O)2(C1-4 alkyl), C(O)(C1-4 alkyl), CF3 or
OCF3);
alternatively NR5R6, NR7R8, NR12R13, NR14R15, NR18R19, may, independently, fonn a 4-7
membered heterocyclic ring, azetidine, pyrrolidine, piperidine, azepine, morpholine or
piperazine, the latter optionally substituted by C1-4 alkyl on the distal nitrogen;
R4, R17 and R23 are, independently, C1-6 alkyl (optionally substituted by halogen, hydroxy
or C3-10 cycloalkyl), CH2(C2-6 alkenyl), phenyl (itself optionally substituted by halogen,
hydroxy, nitro, NH2, NH(C1-4 alkyl), N(C1-4 alkyl)2 (and these alkyl groups may join to
form a ring as described for R5 and R6 above), S(O)2(C1-4 alkyl), S(O)2NH2, S(O)2NH(C1-4
alkyl), S(O)2N(C1-4alkyl)2 (and these alkyl groups may join to form a ring as described for
R5 and R6 above), cyano, C1-4 alkyl, C1-4 alkoxy, C(O)NH2, C(O)NH(C1-4 alkyl),
C(O)N(C1-4 alkyl)2 (and these alkyl groups may join to fonn a ring as described for R5 and
R6 above), CO2H, C02(C1-4 alkyl), NHC(O)(C1-4 alkyl), NHS(O)2(C1-4 alkyl), C(O)(C1-4
alkyl), CF3 or OCF3) or heterocyclyl (itself optionally substituted by halogen, hydroxy,
nitro, NH2, NH(C1-4 alkyl), N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring
as described for R5 andR6 above), S(0)2(C1-4 alkyl), S(0)2NH2, S(O)2NH(C1-4alkyl),
S(0)2N(C1-4alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and
R6 above), cyano, C1-4alkyl, C1-4 alkoxy, C(O)NH2, C(0)NH(C1-4alkyl), C(O)N(C1-4
alkyl)2 (and these alkyl groups may join to form a ring as described for R3 and R6 above),
CO2H, CO2(C1-4 alkyl), NHC(O)(C1-4alkyl), NHS(O)2(C1-4 alkyl), C(O)(C1-4 alkyl), CF3 or
OCF3);
R3 is hydrogen, Ci.6 alkyl or benzyl;
or an N-oxide thereof; or a pharmaceutically acceptable salt thereof; or a solvate thereof.
Certain compounds of the present invention can exist in different isomeric forms (such as enantiomers, diastereomers, geometric isomers or tautomers). The present invention covers all such isomers and mixtures thereof in all proportions.
Suitable salts include acid addition salts such as a hydrochloride, dihydrochloride, hydrobromide, phosphate, sulfate, acetate, diacetate, fumarate, maleate, tartrate, citrate, oxalate, methanesulfonate orp-toluenesulfonate.
The compounds of the invention may exist as solvates (such as hydrates) and the present invention covers all such solvates.
Halogen includes fluorine, chlorine, bromine and iodine. Halogen is, for example, fluorine or chlorine.
Alkyl groups and moieties are straight or branched chain and comprise, for example, 1 to 6 (such as 1 to 4) carbon atoms. Examples of alkyl groups are methyl, ethyl, n-propyl, iso-propyl or tert-butyl.
Alkyl optionally substituted by halogen and haloalkyl comprise an alkyl part and one or more (for example 1 to 6) of the same or different halogen atoms. Alkyl optionally substituted by halogen and haloalkyl are, for example, CF3
Alkenyl and alkynyl groups comprise, for example, 2 to 6 (such as 2 to 4) carbon atoms. Examples of alkenyl groups are vinyl or allyl; and an example of an alkynyl group is propargyl.
Aryl includes phenyl and naphthyl and in one embodiment of the invention is, for example, phenyl.
In one embodiment cycloalkyl groups comprise from 3 to 10 (such as 3 to 8, for example 3 to 6) carbon atoms and are mono-, bi or tricyclic. Cycloalkyl is, for example, cyclopropyl, cyclopentyl, cyclohexyl, norbornyl or camphoryl. The cycloalkyl ring is optionally fused to a benzene ring (for example forming a bicyclo[4.2.0]octa-l,3,5-trienyl or indanyl ring system). In a further embodiment cycloalkyl is monocyclic.
Heterocyclyl is an aromatic or non-aromatic 5 or 6 membered ring, optionally fused to one or more other rings, comprising at least one heteroatom selected from, the group comprising nitrogen, oxygen and sulfur; or an N-oxide thereof, or an S-oxide or S-dioxide thereof. Heterocyclyl is, for example, furyl, thienyl (also known as thiophenyl), pyrrolyl, 2,5-dihydropyrrolyl, thiazolyl, pyrazolyl, oxazolyl, isoxazolyl, imidazolyl, piperidinyl, morpholinyl, pyridinyl, dihydropyridinyl (for example in a 6-oxo-l,6-dihydro-pyridinyl moiety), pyrimidinyl, indolyl, 2,3-dihydroindolyl, benzo[b]furyl (also known as benzfuryl), benz[b]thienyl (also known as benzthienyl or benzthiophenyl), 2,3-dihydrobenz[b]thienyl (for example in a l-dioxo-2,3-dihydrobenz[bjthienyl moiety), indazolyl, benzimidazolyl, benztriazolyl, benzoxazolyl, benzthiazolyl (for example in a lH-benzthiazol-2-one-yl moiety), 2,3-dihydrobenzthiazolyl (for example in a 2,3-dihydrobenzthiazol-2-one-yl moiety), 1,2,3-benzodiiadiazolyl, an imidazopyridinyl (such as imidazo[l,2a]pyridinyl), thieno[3,2-b]pyridin-6-yl, 1,2,3-benzoxadiazolyl, benzo[l,2,3]thiadiazolyl, 2,1,3-benzothiadiazolyl, benzofurazan (also known as 2,1,3-benzoxadiazolyl), quinoxalinyl, dihydro-1-benzopyryliumyl (for example in a coumarinyl or a chromonyl moiety), 3,4-dihydro-lH-2,l-benzothiazinyl (for example in a 2-dioxo-3,4-dihydro-lH-2,l-benzothiazinyl moiety), a pyrazolopyndine (for example lH-pyrazolo[3,4-b]pyridinyl), a purine (for example in a 3,7-dihydro-purin-2,6-dione-8-yl moiety), quinolinyl, isoquinolinyl, dihydroisoquinolinyl (for example in a 2H-isoquinolin-l-one-yl moiety), a naphthyridinyl (for example [l,6]naphthyridinyl or [l,8]naphthyridinyl), a dihydro[l,8]naphthyridinyl (for example in a lH-[l,8]naphthyridin-4-one-yl moiety), a benzothiazinyl, a dihydrobenzothiazinyl (for example in a 4H-benzo[l,4]thiazin-3-onc-yl moiety), benzo[d]imidazo[2,l-b]thiazol-2-yl or dibenzothiophenyl (also known as dibenzothienyl); or an N-oxide thereof, or an S-oxide or S-dioxide thereof.
An N-oxide of a compound of formula (I) is, for example, a 1-oxy-[l,4']bipiperidinyl-1-yl compound.
In one particular aspect the invention provides a compound of formula (I) wherein Ra and Rb are, independently, hydrogen or C1-4 alkyl or Ra forms part of a ring as defined below; Rc is hydrogen or hydroxy; X is CH2, C(O), O, S, S(O), S(O)2 or NR3; Z is (CH2)n; n is 1 or 2; R1 is hydrogen, C1-6 alkyl, aryl or heterocyclyl; R2 is aryl or heterocyclyl; wherein, unless stated otherwise, the foregoing aryl and heterocyclyl moieties are optionally substituted by: halogen, cyano, nitro, hydroxy, oxo, S(0)PR4, OC(O)NR5R6, NR7R8, NR9C(0)R10, NR11C(0)NR12R13, S(O)2NR14R15, NR16S(0)2R17, C(O)NR18R19, C(0)R20, CO2R21, NR22C02R23, C1-6 alkyl, CF3, C1-6alkoxy(C1-6)alkyl, C1-6 alkoxy, OCF3, C1-6 alkoxy(C1-6)alkoxy, C1-6 alkylthio, C2-6alkenyl, C2-6alkynyl, C3-10 cycloalkyl (itself optionally substituted by C1-4 alkyl or oxo), methylenedioxy, difluoromethylenedioxy, phenyl, phenyl(C1-4)alkyl, phenoxy, phenylthio, phenyl(C1-4alkoxy, heterocyclyl, heterocyclyl(C1-6)alkyl, heterocyclyloxy or heterocyclyl(C1-6)alkoxy; wherein any of the immediately foregoing phenyl and heterocyclyl moieties are optionally substituted with halogen, hydroxy, nitro, S(O)q(C1-6 alkyl), S(O)2NH2, S(O)2NH(C1-6 alkyl), S(O)2N(C1-6 alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 below), cyano, C1-4 alkyl, C1-4 alkoxy, C(0)NH2, C(O)NH(C1-4alkyl), C(O)N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 below), CO2H, C02(C1-4 alkyl), NHC(O)(C1-4alkyl), NHS(O)2(C1-4 alkyl), C(O)(C1-4 alkyl), CF3 or OCF3; or Z, R2 and Ra together with the carbon atom to which Z and R° are attached form a ring; p and q are, independently, 0,1 or 2; R5, R6,R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R18, R19, R20, R21 and R22 are, independently, hydrogen, C1-6 alkyl (optionally substituted by halogen, hydroxy or C3-10 cycloalkyl), CH2(C2-6 alkenyl), phenyl (itself optionally substituted by halogen, hydroxy, nitro, NH2, NH(C1-4 alkyl), N(C1-4 alkyl)2, S(O)2(C1-4 alkyl), S(O)2NH2, S(O)2NH(C1-4alkyl), S(O)2N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 below), cyano, C1-4 alkyl, C1-4 alkoxy, C(O)NH2, C(O)NH(C1-4 alkyl), C(O)N(C1-4 alkyl)2(and these alkyl groups may join to form a ring as described for R5 and R6 below), CO2H, C02(C1-4 alkyl), NHC(O)(C1-4 alkyl), NHS(O)2(C1-4 alkyl), C(O)(C1-4 alkyl), CF3 or OCF3) or heterocyclyl (itself optionally substituted by halogen, hydroxy, nitro, NH2, NH(C1-4 alkyl), N(C1-4 alkyl)2, S(0)2(C1-4 alkyl), S(0)2NH2, S(O)2NH(C1-4 alkyl), S(0)2N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 below), cyano, CM alkyl, CM alkoxy, C(0)NH2, C(0)NH(C1-4 alkyl), C(0)N(C1-4 alkyl)2(and these alkyl groups may join to form a ring as described for R5 and R6 below), CO2H, CO2(C1-4 alkyl), NHC(O)(C1-4 alkyl), NHS(O)2(C1-4 alkyl), C(O)(C1-4 alkyl), CF3 or OCF3); alternatively NR5R6, NR7R8, NR12R13, NRI4R15, NR18R19, may, independently, form a 4-7 membered heterocyclic ring, azetidine, pyrrolidine, piperidine, azepine, morpholine or piperazine, the latter optionally substituted by C1-4 alkyl on the distal nitrogen; R4, R17 and R23 are, independently, C1-6 alkyl (optionally substituted by halogen, hydroxy or C3-10 cycloalkyl), CH2(C2-6 alkenyl), phenyl (itself optionally substituted by halogen, hydroxy, nitro, NH2, NH(C1-4 alkyl), N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 above), S(O)2(C1-4 alkyl), S(O)2NH2, S(O)2NH(C1-4 alkyl), S(O)2N(C1-4alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 above), cyano, C1-4alkyl, C1-4 alkoxy, C(O)NH2, C(O)NH(C1-4 alkyl), C(O)N(C1-4alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 above), CO2H, CO2(C1-4 alkyl), NHC(O)(C1-4 alkyl), NHS(0)2(C1-4 alkyl), C(O)(C1-4 alkyl), CF3 or OCF3) or heterocyclyl (itself optionally substituted by halogen, hydroxy, nitro, NH2, NH(C1-4 alkyl), N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 above), S(O)2(C1-4 alkyl), S(O)2NH2, S(O)2NH(C1-4 alkyl), S(O)2N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 above), cyano, C1-4 alkyl, C1-4 alkoxy, C(O)NH2, C(O)NH(C1-4 alkyl), C(O)N(C1-4alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 above), CO2H, CO2(C1-4 alkyl), NHC(O)(C1-4 alkyl), NHS(0)2(C1-4 alkyl), C(O)(C1-4 alkyl), CF3 or OCF3); R3 is hydrogen, C1-6 alkyl or benzyl; or an N-oxide thereof; or a pharmaceutically acceptable salt thereof; or a solvate thereof. In a further aspect the invention provides a compound of formula (I) wherein X is O.
In another aspect of the invention the foregoing aryl (for example phenyl) and heterocyclyl moieties of Rl and R2 are, independently, optionally substituted by: halogen, cyano, nitro, hydroxy, oxo, S(O)PR4, OC(O)NR5R6, NR7R8, NR9C(O)R10, NR11C(0)NR12R13, S(0)2NR14R15, NR16S(O)2R17, C(0)NR18R19, C(O)R20, CO2R21,
NR22C02R23, C1-6 alkyl, CF3, C1-6 alkoxy(C1-6)alkyl, C1-6 alkoxy or OCF3; p is 0, 1 or 2; R5, R6, R7, R8, R9, R10, Rn, R12, R13, R14, R15, R16, R18, R19, R20, R21 and R22 are, independently, hydrogen, C1-6 alkyl (optionally substituted by halogen) or phenyl (itself optionally substituted by halogen, hydroxy, nitro, NH2, NH(C1-4 alkyl), N(C1-4alkyl)2, S(0)2(C1-4 alkyl), S(O)2NH2, S(O)2NH(C1-4 alkyl), S(O)2N(C1-4 alkyl)2 cyano, C1-4 alkyl, CM alkoxy, C(O)NH2, C(0)NH(C1-4alkyl), C(O)N(C1-4 alkyl)2, CO2H, CO2(C1-4 alkyl), NHC(0)(C1-4 alkyl), NHS(0)2(C1-4 alkyl), C(0)(C1-4 alkyl), CF3 or OCF3); and R4, R17 and R23 are, independently, C1-6alkyl (optionally substituted by halogen) or phenyl (itself optionally substituted by halogen, hydroxy, nitro, NH2, NH(C1-4 alkyl), N(C1-4 alkyl)2, S(0)2(C1-4alkyl), S(0)2NH2, S(0)2NH(C1-4 alkyl), S(O)2N(C1-4 alkyl)2,cyano, C1-4 alkyl, CM alkoxy, C(O)NH2, C(O)NH(C1-4 alkyl), C(O)N(C1-4alkyl)2, CO2H, CO2(C1-4 alkyl), NHC(0)(C1-4 alkyl), NHS(O)2(C1-4 alkyl), C(O)(C1-4alkyl), CF3 or OCF3).
When Z, R2 and Ra together with the carbon atom to which Z and R" are attached form a ring, the ring is, for example, a 2,3-dihydro-lH-inden-2-yl ring.
In yet another aspect R1 is phenyl optionally substituted (for example independently mono- or di-substituted) with halogen (for example chlorine or fluorine), cyano, C1-4 alkyl (for example methyl) or C1-4 alkoxy (for example methoxy).
In a further aspect R1 is phenyl optionally substituted (for example independently mono- or di-substituted) with halogen (for example chlorine or fluorine), C1-4 alkyl (for example methyl) or C1-4 alkoxy (for example methoxy).
In a still further aspect R1 is phenyl optionally substituted (for example with one, two or three of the same or different) with fluorine, chlorine, cyano, C1-4 alkyl (for example methyl) or C1-4 alkoxy (for example methoxy).
In another aspect R1 is phenyl optionally substituted (for example with one, two or three of the same or different) with fluorine, chlorine, C1-4 alkyl (for example methyl) or C1-4 alkoxy (for example methoxy).
In yet another aspect R1 is phenyl substituted by one, two or three (for example two or three) substituents independently selected from: fluorine, chlorine, cyano and methyl.
In a further aspect R1 is phenyl substituted by one, two or three (for example two or three) substituents independently selected from: fluorine, chlorine and methyl.
For example R1 is 3,4-dichlorophenyl, 2,4-dichloro-3-methylphenyl, 3,4-dichloro-2-methylphenyl, 2,4-dichlorophenyl, 4-chloro-2-methylphenyl or 4-fluorophenyl.
In a still further aspect of the invention R8 is hydrogen.
In another aspect of the invention Rb is hydrogen or methyl. In yet another aspect Rb is hydrogen.
In a further aspect of the invention Rc is hydrogen.
In a still further aspect of the invention Rd is hydrogen, hydroxy or CM alkyl (such as methyl).
In another aspect Z is CH2, CH2CH2, CHCHs or CHOH. In a further aspect Z is CH2.
In another aspect R2 is phenyl or heterocyclyl optionally substituted by halogen, cyano, nitro, hydroxy, NR7R8, C1-6 alkyl (optionally substituted with halogen), C1-6 alkoxy (optionally substituted with halogen), S(O)p(C1-6 alkyl), S(O),CF3 or S(O)2NR14R15; p and r are, independently, 0,1 or 2; and R7, R8, R14 and R15 are, independently, hydrogen, C1-6 alkyl (optionally substituted by halogen, hydroxy or C3-10 cycloalkyl), CH2(C2-5 alkenyl), phenyl (itself optionally substituted by halogen, hydroxy, nitro, NH2, NH(C1-4alkyl), N(C1-4 alkyl)2, S(0)2(C1-4 alkyl), S(O)2NH2, S(O)2NH(C1-6 alkyl), S(O)2N(C1-4 alkyl)2(and these alkyl groups may join to form a ring as described for R7 and R8 below), cyano, C1-4 alkyl, CM alkoxy, C(O)NH2,C(O)NH(C1-4 alkyl), C(O)N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for R7 and R8 below), C02H, CO2(C1-4 alkyl), NHC(0)(C1-4 alkyl), NHS(O)2(C1-4 alkyl), C(O)(C1-4 alkyl), CF3 or OCF3) or heterocyclyl (itself optionally substituted by halogen, hydroxy, nitro, NH2, NH(C1-4 alkyl), N(C1-4 alkyl)2, S(0)2(C1-4 alkyl), S(O)2NH2, S(O)2NH(C1-4 alkyl), S(O)2N(C1-4alkyl)2(and these alkyl groups may join to form a ring as described for R7 and R8 below), cyano, C1-4 alkyl, C1-4 alkoxy, C(0)NH2, C(O)NH(C1-4alkyl), C(O)N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for R7 and R8 below), CO2H, CO2(C1-4 alkyl), NHC(0)(C1-4 alkyl), NHS(O)2(1-4alkyl), C(0)(C1-4 alkyl), CF3 or OCF3); or alternatively NR7R8 or NR14R15 may, independently, form a 4-7 membered heterocyclic ring, azetidine, pyrrolidine, piperidine, azepine, morpholine or piperazine, the latter optionally substituted by C1-4 alkyl on the distal nitrogen.
In yet another aspect of the invention R2 is phenyl or heterocyclyl optionally substituted by halogen (such as fluoro or chloro), cyano, hydroxy, CM alkyl (such as methyl), C1-4 haloalkyl (such as CF3) or C1-4 alkoxy (such as methoxy).
In a further aspect R2 is phenyl or heterocyclyl optionally substituted by halogen (such as fluoro or chloro), C1-4 alkyl (such as methyl), C1-4 haloalkyl (such as CF3) or C1-4 alkoxy (such as methoxy).
In a still further aspect R2 is phenyl optionally substituted by halogen (such as fluoro or chloro), cyano, hydroxy, or C1-4 alkyl (such as methyl).
In another aspect heterocyclyl is indolyl, imidazolyl, thienyl or pyridinyl.
In yet another aspect the present invention provides a compound of formula (I) wherein: Rc is hydrogen; X is 0; Z is CH2; R1 is phenyl substituted by halogen (for example by one or two chlorine atoms) or C1-4 alkyl (for example methyl); R2 is phenyl or heterocyclyl optionally substituted by halogen (such as fluoro or chloro), C1-4 alkyl (such as methyl), C1-4 haloalkyl (such as CF3) or C1-4 alkoxy (such as methoxy); Rb is hydrogen; and heterocyclyl is indolyl, imidazolyl, thienyl or pyridinyl. Ra is hydrogen.
In a further aspect the present invention provides a compound of formula (I) wherein: Ra and Rc are both hydrogen; Rb is hydrogen or C1-4 alkyl (such as methyl or tert-butyl); X is O; Z is CH2, CH2CH2, CHCH3 or CHOH; R1 is phenyl substituted by halogen (for example by one or two chlorine atoms), cyano or C1-4 alkyl (for example methyl); R2 is phenyl or heterocyclyl optionally substituted by halogen (such as fluoro or chloro), cyano, hydroxy, C1-4 alkyl (such as methyl), C1-4 haloalkyl (such as CF3) or C1-4 alkoxy (such as methoxy); and heterocyclyl is indolyl, imidazolyl, thienyl or pyridinyl; or a salt thereof (such as a dihydrochloride).
The compounds of the present invention can be prepared as described below.
A compound of formula (I) can be prepared by reacting a compound of formula (II):
(Formula Removed)
with a compound of formula (III)
(Formula Removed)
in the presence of NaBH(OAc)a or NaBH3(CN) in a suitable solvent (for example an aliphatic alcohol such as methanol or ethanol) at a suitable temperature (such as in the range 0°C to 30°C).
Alternatively, a compound of formula (I), where Rb is not hydrogen, can be prepared by reacting a compound of formula (II) with a compound of formula (in), where Rb is not hydrogen, in the presence of NaBH(OAc)3 in the presence of a suitable base (such as triethylamine) in a suitable solvent (such as tetrahydrofuran) at a suitable temperature (such as in the range 0°C to 30°C).
For a compound of formula (I):
• when Rb is hydrogen said compound may be converted to a compound of the
invention where Rb is not hydrogen by a standard esterification method well known
in the art; and,
• when Rb is not hydrogen said compound may be converted to a compound of the
invention where Rb is hydrogen by a standard ester hydrolysis method well known
in the art.
Such methods are described in undergraduate organic chemistry textbooks (such as Advanced Organic Chemistry by J March, 5th edition M B Smith and J March, Wiley, 2001).
A compound of formula (n) can be prepared by reacting a compound of formula (IV):
(Formula Removed)
with lead tetra-acetate in the presence of sodium carbonate in dichloromethane.
A compound of formula (IV) can be prepared by reducing a compound of formula (V):


(Formula Removed)
with borane in tetrahydrofuran at reflux.
A compound of formula (V) can be prepared by oxidising a compound of formula (VI):
(Formula Removed)
with osmium tetroxide in the presence of N-methyl morpholine N-Oxide (NMMO) in aqueous acetone at ambient (for example 10-30°C) temperature.
A compound of formula (VI) can be prepared by coupling a compound of formula (VII):
(Formula Removed)
and a compound of formula (VIII):
(Formula Removed)
under conventional conditions (such as EDCI / HOBT / DMAP) in dichloromethane at ambient (for example 10-30°C) temperature.
Alternatively a compound of formula (I) wherein Ra represents H may be prepared by reaction of a compound of formula (DC) with a compound of formula (X) wherein L is a suitable leaving group (for example bromide, Inflate or methanesulfonate) in a suitable solvent, for example dichloromethane, at a temperature in the range 0°C to 30°C, in the presence of a base (such as a tri(C1-6 alkyl)amine, for example triethylamine or Hunig's base).
(Formula Removed)
A compound of formula (IX) can be prepared by deprotecting a compound of formula (XI):

(Formula Removed)
for example using trifluoroacetic acid in a suitable solvent (such as dichloromethane) or using a source of hydrogen chloride in a suitable solvent (such as dioxane).
A compound of formula (XI), wherein RC is hydrogen, can be prepared by reacting a compound of formula (VII) with a compound of formula (XII):

(Formula Removed)


in the presence of NaBH(OAc)3 and acetic acid, in a suitable solvent (such as tetrahydrofuran or dichloromethane).
A compound of. formula (XI), wherein Rc is hydroxy, can be prepared by reacting a compound of fonnula (XI) with a compound of formula (XIII):
(Formula Removed)
in a suitable solvent (such as a C1-6 aliphatic alcohol, for example ethanol) at room temperature (0°C to 30°C, such as 15°C to 30°C).
Alternatively a compound of formula (I) wherein Ra represents H may be prepared by hydrolysis of a compound of formula (XIV), wherein Xc represents a chiral auxiliary of a type well-known in the art (for example (4R,5S)-l,5-dimethyl-4-phenylimidazolidin-2-one, (4R)-4-(phenylmethyl)-2-oxazolidinone, (4S)-4-(phenylmethyl)-2-oxazolidinone or (3aR,6S,7aS)-hexahydro-8,8-dimethyl-3H-3a,6-methano-2,l-benzisothiazole2,2-dioxide), for example with aqueous sodium hydroxide in a suitable solvent (such as an aliphatic alcohol, for example methanol), at a temperature between 10°C and reflux of the solvent, typically at about 45°C,
(Formula Removed)
A compound of formula (XIV) may be prepared by deprotonation of a compound of formula (XV) for example with lithium hexamethyl disilazide, at a temperature between -78°C and 0°C followed by reaction with a compound of formula (XVI), at a temperature between -78°C and 0°C, typically at -20°C.

(Formula Removed)
A compound of formula (XV) may be prepared by reaction of a compound of formula (IX) with a compound of formula (XVII) in a suitable solvent, for example tetrahydrofuran in the presence of a base, for example aqueous sodium bicarbonate, at ambient temperature.

(Formula Removed)
Further compounds of formula (I) can be prepared by adaptation of: the routes described above, methods described in the art or the Examples recited below.
Compounds of formula (IIl), VII), (VIII) and (XVII) can be prepared by using or adapting methods described in the art. The preparation of various phenoxy piperidines is described in WO 01/77101.
In the above processes it may be desirable or necessary to protect an acid group or a hydroxy or other potentially reactive group. Suitable protecting groups and details of processes for adding and removing such groups may be found in "Protective Groups in Organic Synthesis", 3rd Edition (1999) by Greene and Wuts.
In another aspect the present invention provides processes for the preparation of compounds of formula (I).
(Formula Removed)
The compounds of formula (I) have activity as Pharmaceuticals, in particular as modulators of chemokine receptor (for example CCR3) activity, and may be used in the treatment of autoimmune, inflammatory, proliferative or hyperproliferative diseases, or immunologically-mediated diseases (including rejection of transplanted organs or tissues and Acquired Immunodeficiency Syndrome (AIDS)).
Examples of these conditions are:
(1) (the respiratory tract) obstructive diseases of airways including: chronic obstructive
pulmonary disease (COPD) (such as irreversible COPD); asthma {such as bronchial,
allergic, intrinsic, extrinsic or dust asthma, particularly chronic or inveterate asthma
(for example late asthma or airways hyper-responsiveness)}; bronchitis {such as
eosinophilic bronchitis}; acute, allergic, atrophic rhinitis or chronic rhinitis including
rhinitis caseosa, hypertrophic rhinitis, rhinitis purulenta, rhinitis sicca or rhinitis
medicamentosa; membranous rhinitis including croupous, fibrinous or
pseudomembranous rhinitis or scrofulous rhinitis; seasonal rhinitis including rhinitis
nervosa (hay fever) or vasomotor rhinitis; sarcoidosis; fanner's lung and related
diseases; nasal polyposis; fibroid lung, idiopathic interstitial pneumonia, antitussive
activity, treatment of chronic cough associated with inflammatory conditions of the
airways or iatrogenic induced cough;
(2) (bone and joints) armrides including rheumatic, infectious, autoimmune, seronegative
spondyloarthropathies (such as ankylosing spondylitis, psoriatic arthritis or Reiter's
disease), Behc.et's disease, Sjogren's syndrome or systemic sclerosis;
(3) (skin and eyes) psoriasis, atopic dermatitis, contact dermatitis or other eczmatous
dermitides, seborrhoetic dermatitis, lichen planus, phemphigus, bullous phemphigus,
epidermolysis bullosa, urticaria, angiodermas, vasculitides erythemas, cutaneous
eosinophilias, uveitis, alopecia areata, corneal ulcer or vernal conjunctivitis;
(4) (gastrointestinal tract) Coeliac disease, proctitis, eosinophilic gastro-enteritis,
mastocytosis, Crohn's disease, ulcerative colitis, irritable bowel disease or food-
related allergies which have effects remote from the gut (for example migraine,
rhinitis or eczema);
(5) (Allograft rejection) acute and chronic following, for example, transplantation of
kidney, heart, liver, lung, bone marrow, skin or cornea; or chronic graft versus host
disease; and/or
(6) (other tissues or diseases) Alzheimer's disease, multiple sclerosis, atherosclerosis, Acquired Immunodeficiency Syndrome (ADDS), lupus disorders (such as lupus erythematosus or systemic lupus), erythematosus, Hashimoto's thyroiditis, myasthenia gravis, type I diabetes, nephrotic syndrome, eosinophilia fascitis, hyper IgE syndrome, leprosy (such as lepromatous leprosy), peridontal disease, Sezary syndrome, idiopathic thrombocytopenia pupura or disorders of the menstrual cycle.
The compounds of formula (I) or a pharmaceutically acceptable salt thereof or a solvate thereof, are also HI antagonists (and can, therefore, be used in the treatment of allergic disorders); and may also be used to control a sign and/or symptom of what is commonly referred to as a cold (for example a sign and/or symptom of a common cold or influenza or other associated respiratory virus infection).
According to a further feature of the present invention there is provided a method for treating a chemokine mediated disease state (for example a CCR3 mediated disease state) in a mammal, such as man, suffering from, or at risk of, said disease state, which comprises administering to a mammal in need of such treatment a therapeutically effective amount of a compound of the formula (I) or a pharmaceutically acceptable salt thereof or a solvate thereof.
According to another feature of the present invention there is provided a method for antagonising H1 in a mammal, such as man, suffering from, or at risk of, an HI mediated disease state, which comprises administering to a mammal in need of such treatment a therapeutically effective amount of a compound of the formula (I) or a pharmaceutically acceptable salt thereof or a solvate thereof.
According to yet another feature of the present invention there is provided a method for treating a sign and/or symptom of what is commonly referred to as a cold in a mammal, such as man, suffering from, or at risk of, said disease state, which comprises administering to a mammal in need of such treatment a therapeutically effective amount of a compound of the formula (I) or a pharmaceutically acceptable salt thereof or a solvate thereof.
The invention also provides a compound of the formula (I), or a pharmaceutically acceptable salt thereof or a solvate thereof, for use in therapy.
In another aspect the invention provides the use of a compound of formula (I), or a pharmaceutically acceptable salt thereof or a solvate thereof, in the manufacture of a medicament for use in therapy (for example modulating chemokine receptor activity (for
example CCR3 receptor activity, antagonizing HI or treating a sign and/or symptom of what is commonly referred to as a cold).
A pharmaceutical composition of the present invention which comprises a compound of formula (I), or a pharmaceutically acceptable salt thereof or solvate, and a pharmaceutically acceptable adjuvant, diluent or carrier, is found to show surprising therapeutic efficacy. The pharmaceutical composition is therefore synergistic.
The invention further provides the use of a compound of formula (I), or a pharmaceutically acceptable salt thereof, in the manufacture of a medicament for use in the treatment of:
(1) (the respiratory tract) obstructive diseases of airways including: chronic obstructive
pulmonary disease (COPD) (such as irreversible COPD); asthma {such as bronchial,
allergic, intrinsic, extrinsic or dust asthma, particularly chronic or inveterate asthma
(for example late asthma or airways hyper-responsiveness)}; bronchitis {such as
eosinophilic bronchitis}; acute, allergic, atrophic rhinitis or chronic rhinitis including
rhinitis caseosa, hypertrophic rhinitis, rhinitis purulenta, rhinitis sicca or rhinitis
medicamentosa; membranous rhinitis including croupous, fibrinous or
pseudomembranous rhinitis or scrofulous rhinitis; seasonal rhinitis including rhinitis
nervosa (hay fever) or vasomotor rhinitis; sarcoidosis; farmer's lung and related
diseases; nasal polyposis; fibroid lung, idiopathic interstitial pneumonia, antitussive
activity, treatment of chronic cough associated with inflammatory conditions of the
airways or iatrogenic induced cough;
(2) (bone and joints) arthrides including rheumatic, infectious, autoimmune, seronegative
spondyloarthropathies (such as ankylosing spondylitis, psoriatic arthritis or Reiter's
disease), Behcet's disease, Sjogren's syndrome or systemic sclerosis;
(3) (skin and eyes) psoriasis, atopic dermatitis, contact dermatitis or other eczmatous
dermitides, seborrhoetic dermatitis, lichen planus, phemphigus, bullous phemphigus,
epidermolysis bullosa, urticaria, angiodermas, vasculitides erythemas, cutaneous
eosinophilias, uveitis, alopecia areata, cornea! ulcer or vernal conjunctivitis;
(4) (gastrointestinal tract) Coeliac disease, proctitis, eosinophilic gastro-enteritis,
mastocytosis, Crohn's disease, ulcerative colitis, irritable bowel disease or food-
related allergies which have effects remote from the gut (for example migraine,
rhinitis or eczema);
(5) (Allograft rejection) acute and chronic following, for example, transplantation of
kidney, heart, liver, lung, bone marrow, skin or cornea; or chronic graft versus host
disease; and/or
(6) (other tissues or diseases) Alzheimer's disease, multiple sclerosis, atherosclerosis,
Acquired Immunodeficiency Syndrome (AIDS), lupus disorders (such as lupus
erythematosus or systemic lupus), erythematosus, Hashimoto's thyroiditis, myasthenia gravis, type I diabetes, nephrotic syndrome, eosinophilia fascitis, hyper IgE syndrome, leprosy (such as lepromatous leprosy), Peridontal disease, sezary syndrome, idiopathic thrombocytopenia pupura or disorders of the menstrual cycle; in a mammal (for example man).
In a further aspect the invention provides a compound of formula (I), or a pharmaceutically acceptable salt thereof, for use in the treatment of asthma {such as bronchial, allergic, intrinsic, extrinsic or dust asthma, particularly chronic or inveterate asthma (for example late asthma or airways hyper-responsiveness)}; or rhinitis {including acute, allergic, atrophic or chronic rhinitis, such as rhinitis caseosa, hypertrophic rhinitis, rhinitis purulenta, rhinitis sicca or rhinitis medicamentosa; membranous rhinitis including croupous, fibrinous or pseudomembranous rhinitis or scrofulous rhinitis; seasonal rhinitis including rhinitis nervosa (hay fever) or vasomotor rhinitis}.
In a still further aspect a compound of formula (I), or a pharmaceutically acceptable salt thereof, is useful in the treatment of asthma.
The present invention also provides a the use of a compound of formula (I), or a pharmaceutically acceptable salt thereof, in the manufacture of a medicament for use in the treatment of asthma {such as bronchial, allergic, intrinsic, extrinsic or dust asthma, particularly chronic or inveterate asthma (for example late asthma or airways hyper-responsiveness)}; or rhinitis {including acute, allergic, atrophic or chronic rhinitis, such as rhinitis caseosa, hypertrophic rhinitis, rhinitis purulenta, rhinitis sicca or rhinitis medicamentosa; membranous rhinitis including croupous, fibrinous or pseudomembranous rhinitis or scrofulous rhinitis; seasonal rhinitis including rhinitis nervosa (hay fever) or vasomotor rhinitis}.
In order to use a compound of the invention, or a pharmaceutically acceptable salt thereof or solvate thereof, for the therapeutic treatment of a mammal, such as man, said ingredient is normally formulated in accordance with standard pharmaceutical practice as a pharmaceutical composition. Therefore in another aspect the present invention provides a pharmaceutical composition which comprises a compound of the formula (I), or a pharmaceutically acceptable salt thereof or a solvate thereof (active ingredient), and a pharmaceutically acceptable adjuvant, diluent or carrier.
In a further aspect the present invention provides a process for the preparation of said composition which comprises mixing active ingredient with a pharmaceutically
acceptable adjuvant, diluent or carrier. Depending on the mode of administration, the pharmaceutical composition will, for example, comprise from 0,05 to 99 %w (per cent by weight), such as from 0.05 to 80 %w, for example from 0.10 to 70 %w, such as from 0.10 to 50 %w, of active ingredient, all percentages by weight being based on total composition.
The pharmaceutical compositions of this invention may be administered in standard manner for the disease condition that it is desired to treat, for example by topical (such as to the lung and/or airways or to the skin), oral, rectal or parenteral administration. For these purposes the compounds of this invention may be formulated by means known in the art. A suitable pharmaceutical composition of this invention is one suitable for oral administration in unit dosage form, for example a tablet or capsule which contains between 0.1 mg and Ig of active ingredient.
Each patient may receive, for example, a dose of O.Olmgkg'1 to lOOmgkg"1, for example in the range of O.lmgkg"1 to 20mgkg"1, of the active ingredient administered, for example, 1 to 4 times per day.
The invention further relates to combination therapies wherein a compound of formula (1) or a pharmaceutically acceptable salt, solvate or in vivo hydrolysable ester thereof, or a pharmaceutical composition or formulation comprising a compound of formula (1) is administered concurrently or sequentially or as a combined preparation with another therapeutic agent or agents, for the treatment of one or more of the conditions listed.
In particular, for the treatment of the inflammatory diseases such as (but not restricted to) rheumatoid arthritis, osteoarthritis, asthma, allergic rhinitis, chronic obstructive pulmonary disease (COPD), psoriasis, and inflammatory bowel disease, the compounds of the invention may be combined with agents such as:- Non-steroidal anti-inflammatory agents (hereinafter NSAIDs) including non-selective cyclo-oxygenase (COX)-l / COX-2 inhibitors whether applied topically or systemically (such as piroxicam, diclofenac, propionic acids such as naproxen, flurbiprofen, fenoprofen, ketoprofen and ibuprofen, fenamates such as mefenamic acid, indomethacin, sulindac, azapropazone, pyrazolones such as phenylbutazone, salicylates such as aspirin); selective COX-2 inhibitors (such as meloxicam, celecoxib, rofecoxib, valdecoxib, lumarocoxib, parecoxib and etoricoxib); cyclo-oxygenase inhibiting nitric oxide donors (CINODs); glucocorticosteroids (whether administered by topical, oral, intramuscular, intravenous, or intra-articular routes); methotrexate, leflunomide; hydroxychloroquine, d-penicillamine, auranofin or other parenteral or oral gold preparations ; analgesics; diacerein; intra-aiticular therapies such as hyaluronic acid derivatives; and nutritional supplements such as glucosamine.
The present invention still further relates to the combination of a compound of the invention together with a cytokine or agonist or antagonist of cytolcine function, (including agents which act on cytokine signalling pathways such as modulators of the SOCS system) including alpha-, beta-, and gamma-interferons; insulin-like growth factor type I (IGF-1); interleukins (IL) including ELI to 17, and interleukin antagonists or inhibitors such as anakinra; tumour necrosis factor alpha (TNF-α) inhibitors such as anti-TNF monoclonal antibodies (for example infliximab; adalimumab , and CDP-870) and TNF receptor antagonists including immunoglobulin molecules (such as etanercept) and low-molecular-weight agents such as pentoxyfylline.
The present invention still further relates to the combination of a compound of the invention together with modulators of chemokine receptor function such as antagonists of CCRl, CCR2, CCR2A, CCR2B, CCR4, CCR5, CCR6, CCR7, CCR8, CCR9, CCRIO and CCRl 1 (for the C-C family); CXCR1, CXCR2, CXCR3, CXCR4 and CXCR5 (for the C-
X~C family) and CXaCRl for the C-X3-C family.
The present invention still further relates to the combination of a compound of the invention together with an inhibitor of matrix metalloproteases (MMPs), i.e., the stromelysins, the collagenases, and the gelatinases, as well as aggrecanase; especially collagenase-1 (MMP-1), collagenase-2 (MMP-8), collagenase-3 (MMP-13), stromelysin-1 (MMP-3), stromelysin-2 (MMP-10), and stromelysin-3 (MMP-11) and MMP-9 and MMP-12, including agents such as doxycycline.
The present invention still further relates to the combination of a compound of the invention together with a leukotriene biosynthesis inhibitor, 5-lipoxygenase (5-LO) inhibitor or 5-lipoxygenase activating protein (FLAP) antagonist such as; zileuton; ABT-761; fenleuton; tepoxalin; Abbott-79175; Abbott-85761; N-(5-substituted)-thiophene-2-alkylsulfonamides; 2,6-di-tert-butylphenolhydrazones; methoxytetrahydropyrans such as Zeneca ZD-2138; the compound SB-210661; pyridinyl-substituted 2-cyanonaphthalene compounds such as L-739,010; 2-cyanoquinoline compounds such as L-746,530; indole and quinoline compounds such as MK-591, MK-886, and BAY x 1005.
The present invention still further relates to the combination of a compound of the invention together with a receptor antagonist for leukotrienes (LT) B4, LTC4, LTD4, and
LTE4. selected from the group consisting of the phenothiazin-31s such as L-651,392; amidino compounds such as CGS-25019c; benzoxalamines such as ontazolast; benzenecarboximidamides such as BIIL 284/260; and compounds such as zafirlukast, ablukast, montelukast, pranlukast, verlukast (MK-679), RG-12525, Ro-245913, iralukast (CGP 45715A), and BAY x 7195.
The present invention still further relates to the combination of a compound of the invention together with a phosphodiesterase (PDE) inhibitor such as the methylxanthanines including theophylline and aminophylline; and selective PDE isoenzyme inhibitors including PDE4 inhibitors and inhibitors of the isoform PDE4D, and inhibitors of PDE5.
The present invention still further relates to the combination of a compound of the invention together with histamine type 1 receptor antagonists such as cetirizine, loratadine, desloratadine, fexofenadine, acrivastine, terfenadine, astemizole, azelastine, levocabastine, chlorphenirarnine, promethazine, cyclizine, and mizolastine applied orally, topically or parenterally.
The present invention still further relates to the combination of a compound of the invention together with a proton pump inhibitor (such as omeprazole) or gastroprotective histamine type 2 receptor antagonist.
The present invention still further relates to the combination of a compound of the invention with antagonists of the histamine type 4 receptor.
The present invention still further relates to the combination of a compound of the invention together with an alpha-l/alpha-2 adrenoceptor agonist vasoconstrictor sympathomimetic agent, such as propylhexedrine, phenylephrine, phenylpropanolamine, ephedrine, pseudoephedrine, naphazoline hydrochloride, oxymetazoline hydrochloride, tetrahydrozoline hydrochloride, xylometazoline hydrochloride, tramazoline hydrochloride, and ethylnorepinephrine hydrochloride.
The present invention still further relates to the combination of a compound of the invention together with anticholinergic agents including muscarinic receptor (Ml, M2, and M3) antagonists such as atropine, hyoscine, glycopyrrrolate, ipratropium bromide, tiotropium bromide, oxitropium bromide, pirenzepine, and telenzepine.
The present invention still further relates to the combination of a compound of the invention together with a beta-adrenoceptor agonist (including beta receptor subtypes 1-4) such as isoprenaline, salbutamol, formoterol, salmeterol, terbutaline, orciprenaline, bitolterol mesylate, and pirbuterol, including chiral enantiomers thereof.
The present invention still further relates to the combination of a compound of the invention together with a chromone, including sodium cromoglycate and nedocromil sodium.
The present invention still further relates to the combination of a compound of the invention together with a glucocorticoid, such as flunisolide, triamcinolone acetonide, beclomethasone dipropionate, budesonide, fluticasone propionate, ciclesonide, and mometasone furoate.
The present invention still further relates to the combination of a compound of the invention together with an agent that modulate nuclear hormone receptors such as PPARs.
The present invention still further relates to the combination of a compound of the invention together with an immunoglobulin (Ig) or Ig preparation or an antagonist or antibody modulating Ig function such as anti-IgE (e.g. omalizumab).
The present invention still further relates to the combination of a compound of the invention together with other systemic or topically-applied anti-inflammatory agents including thalidomide and derivatives, retinoids, dithranol, and calcipotriol.
The present invention still further relates to the combination of a compound of the invention together with combinations of aminosalicylates and sulfapyridine such as sulfasalazine, mesalazine, balsalazide, and olsalazine; and immunomodulatory agents such as the thiopurines, and corticosteroids such as budesonide.
The present invention still further relates to the combination of a compound of the invention together with an antibacterial agent including penicillin derivatives, tetracyclines, macrolides, beta-lactams, fluoroquinolones, metronidazole, and inhaled aminoglycosides; and antiviral agents including acyclovir, famciclovir, valaciclovir, ganciclovir, cidofovir; amantadine, rimantadine; ribavirin; zanamavir and oseltamavir; protease inhibitors such as indinavir, nelfinavir, ritonavir, and saquinavir; nucleoside reverse transcriptase inhibitors such as didanosine, lamivudine, stavudine, zalcitabine, zidovudine; non-nucleoside reverse transcriptase inhibitors such as nevirapine, efavirenz.
The present invention still further relates to the combination of a compound of the invention together with cardiovascular agents such as calcium channel blockers, beta-adrenoceptor blockers, angiotensin-converting enzyme (ACE) inhibitors, angiotensin-2 receptor antagonists; lipid lowering agents such as statins, and fibrates; modulators of blood cell morphology such as pentoxyfylline; thrombolytics, and anticoagulants including platelet aggregation inhibitors.

The present invention still further relates to the combination of a compound of the invention together with CNS agents such as antidepressants (such as sertraline), anti-Parkinsonian drugs (such as deprenyl, L-dopa, ropinirole, pramipexole, MAOB inhibitors such as selegine and rasagiline, comP inhibitors such as tasmar, A-2 inhibitors, dopamine reuptake inhibitors, NMD A antagonists, nicotine agonists, dopamine agonists and inhibitors of neuronal nitric oxide synthase), and anti-Alzheimer's drugs such as donepezil, rivastigmine, tacrine, COX-2 inhibitors, propentofylline or metrifonate.
The present invention still further relates to the combination of a compound of the invention together with agents for the treatment of acute and chronic pain, including centrally and peripherally-acting analgesics such as opioid analogues and derivatives, carbamazepine, phenytoin, sodium valproate, amitryptiline and other antidepressant agents, paracetamol, and non-steroidal anti-inflammatory agents.
The present invention still further relates to the combination of a compound of the invention together with parenterally or topically-applied (including inhaled) local anaesthetic agents such as lignocaine and analogues.
The compounds of the present invention may also be used in combination with anti-osteoporosis agents including hormonal agents such as raloxifene, and biphosphonates such as alendronate.
The present invention still further relates to the combination of a compound of the invention together with (i) tryptase inhibitors; (ii) platelet activating factor (PAF) antagonists; (iii) interleukin converting enzyme (ICE) inhibitors; (iv) IMPDH inhibitors; (v) adhesion molecule inhibitors including VLA-4 antagonists; (vi) cathepsins; (vii) Kinase inhibitors including but not limited to inhibitors of tyrosine kinases (such as Btk, Itk, Jak3 MAP examples of inhibitors might include Gefitinib, Imatinib mesylate), Serine / threonine kinases (including but not limited to inhibitors of MAP kinases such as p38, JNK, protein kinases A, B and C and IKK), and kinases involved in cell cycle regulation (such as but not limted to the cylin dependent kinases); (viii) glucose-6 phosphate dehydrogenase inhibitors; (ix) kinin-B1 - and B2 -receptor antagonists; (x) anti-gout agents, e.g., colchicine; (xi) xanthine oxidase inhibitors, e.g., allopurinol; (xii) uricosuric agents, e.g., probenecid, sulfinpyrazone, and benzbromarone; (xiii) growth hormone secretagogues; (xiv) transforming growth factor (TGFß); (xv) platelet-derived growth factor (PDGF); (xvi) fibroblast growth factor, e.g., basic fibroblast growth factor (bFGF); (xvii) granulocyte macrophage colony stimulating factor (GM-CSF); (xviii) capsaicin

cream; (xix) tachykinin NK1 and NK3 receptor antagonists such as the group consisting of NKP-608C; SB-233412 (talnetant); and D-4418; (xx) elastase inhibitors such as the group consisting of UT-77 and ZD-0892; (xxi) TNF-alpha converting enzyme inhibitors (TACE); (xxii) induced nitric oxide synthase (iNOS) inhibitors or (xxiii) chemoattractant receptor-homologous molecule expressed on TH2 cells, (such as CRTH2 antagonists) (xxiv) inhibitors of P38 (xxv) agents modulating the function of Toll-like receptors (TLR) and (xxvi) agents modulating the activity of purinergic receptors such as P2X7; (xxvii) inhibitors of transcription factors activation such as NFkB, API, and STATS.
The compounds of the invention can also be used in combination with existing therapeutic agents for the treatment of cancer. Suitable agents to be used in combination include:
(i) antiproliferative/antineoplastic drugs and combinations thereof, as used in medical oncology, such as alkylating agents (for example cis-platin, carboplatin, cyclophosphamide, nitrogen mustard, melphalan, chlorambucil, busulphan and nitrosoureas); antimetabolites (for example antifolates such as fluoropyrimidines like 5-fluorouracil and tegafur, raltitrexed, methotrexate, cytosine arabinoside, hydroxyurea, gemcitabine and paclitaxel; antitumour antibiotics (for example anthracyclines like adriamycin, bleomycin, doxorubicin, daunomycin, epirubicin, idarubicin, mitomycin-C, dactinomycin and mithramycin); antimitotic agents (for example vinca alkaloids like vincristine, vinblastine, vindesine and vinorelbine and taxoids like taxol and taxotere); and topoisomerase inhibitors (for example epipodophyllotoxins like etoposide and teniposide, amsacrine, topotecan and camptothecins);
(ii) cytostatic agents such as antioestrogens (for example tamoxifen, toremifene, raloxifene, droloxifene and iodoxyfene), oestrogen receptor down regulators (for example fulvestrant), antiandrogens (for example bicalutamide, flutamide, nilutamide and cyproterone acetate), LHRH antagonists or LHRH agonists (for example goserelin, leuprorelin and buserelin), progestogens (for example megestrol acetate), aromatase inhibitors (for example as anastrozole, letrozole, vorazole and exemestane) and inhibitors of 5α-reductase such as finasteride;
(iii) Agents which inhibit cancer cell invasion (for example metalloproteinase inhibitors like marimastat and inhibitors of urokinase plasminogen activator receptor function); (iv) inhibitors of growth factor function, for example such inhibitors include growth factor antibodies, growth factor receptor antibodies (for example the anti-erbb2 antibody
trastuzumab and the anti-erbbl antibody cetuximab [C225]) , famesyl transferase
inhibitors, tyrosine kinase inhibitors and serine/threonine kinase inhibitors, for example
inhibitors of the epidermal growth factor family (for example EGFR family tyrosine kinase
inhibitors such as N-(3-chloro-4-fluorophenyl)-7-methoxy-6-(3-
morpholinopropoxy)quinazolin-4-amine (gefitinib, AZD1839),N-(3-ethynylphenyl)-6,7-
bis(2-methoxyethoxy)quinazolin-4-amine (erlotinib, OSI-774) and 6-acrylamido-N-(3-
chloro-4-fluorophenyl)-7-(3-morpholinopropoxy)quinazolin-4-amine (CI1033)), for
example inhibitors of the platelet-derived growth factor family and for example inhibitors
of the hepatocyte growth factor family;
(v) antiangiogenic agents such as those which inhibit the effects of vascular endothelial
growth factor, (for example the anti-vascular endothelial cell growth factor antibody
bevacizumab, compounds such as those disclosed in International Patent Applications WO
97/22596, WO 97/30035, WO 97/32856 and WO 98/13354) and compounds that work by
other mechanisms (for example linomide, inhibitors of integrin αvß3 function and
angiostatin);
(vi) vascular damaging agents such as combretastatin A4 and compounds disclosed in
International Patent Applications WO 99/02166, WO 00/40529, WO 00/41669, WO
01/92224, WO 02/04434 and WO 02/08213;
(vii) antisense therapies, for example those which are directed to the targets listed above,
such as ISIS 2503, an anti-ras antisense;
(viii) gene therapy approaches, including for example approaches to replace aberrant genes
such as aberrant p53 or aberrant BRCA1 or BRCA2, GDEPT (gene-directed enzyme
pro-drug therapy) approaches such as those using cytosine deaminase, thymidine kinase or
a bacterial nitroreductase enzyme and approaches to increase patient tolerance to
chemotherapy or radiotherapy such as multi-drug resistance gene therapy; and
(ix) immunotherapeutic approaches, including for example ex-vivo and in-vivo approaches
to increase the immunogenicity of patient tumour cells, such as transfection with cytokines
such as interleukin 2, interleukin 4 or granulocyte-macrophage colony stimulating factor,
approaches to decrease T-cell anergy, approaches using transfected immune cells such as
cytokine-transfected dendritic cells, approaches using cytokine-transfected tumour cell
lines and approaches using anti-idiotypic antibodies.
The invention will now be illustrated by the following non-limiting examples in which, unless stated otherwise:
(i) when given, 1H NMR data is quoted and is in the form of delta values for major
diagnostic protons, given in parts per million (ppm) relative to tetramethylsilane (TMS) as
an internal standard, determined at 300MHz or 400MHz using perdeuterio DMSO-D6
(CD3SOCD3) or CDCl3 as the solvent unless otherwise stated;
(ii) mass spectra (MS) were run with an electron energy of 70 electron volts in the
chemical ionisation (CI) mode using a direct exposure probe; where indicated ionisation
was effected by electron impact (El) or fast atom bombardment (FAB); where values for
m/z are given, generally only ions which indicate the parent mass are reported, and unless
otherwise stated the mass ion quoted is the positive mass ion - (M+H)+
(iii) the title and sub-title compounds of the examples and methods were named using the
index name program from Advanced Chemistry Development Inc, version 6.00;
(iv) unless stated otherwise, reverse phase HPLC was conducted using a "Symmetry",
"NovaPak" or "Xerra" reverse phase silica column;
(v) for analytical HPLC the following conditions were used:
Reverse phase analytical HPLC (Hewlett Packard Series 1100) using Waters "Symmetry"
C8 column 3.5µm; 4.6 x 50mm column using 0.1% ammonium acetate/acetonitrile
gradients at 2 mL/min given as % aqueous
STANDARD 75% to 5% over 3 min
PAST 45% to 5% over 2.5 min
MEDIUM FAST 65% to 5% in 2.5 min
SLOW 95% to 50% in 2.5 min
SUPERSLOW 100% to 80% in 2.5 min; and
(vi) the following abbreviations are used:

(Table Removed)
INTERMEDIATE 1
4-[[4-(3,4-Dichlorophenoxy)-l-piperidinyl]methyl]-l,2-cyclopentanediol a) l-(3-Cyclopenten-1 -ylcarbonyl)-4-(3,4-dichlorophenoxy)-piperidine
3,4-Dichlorophenoxypipcridine (3.09 g) was dissolved in dichloromethane (80 mL). HOBT (1.77 g) and DMAP (0.44 g) were added followed by a solution of 3-cyclopentene-1-carboxylic acid (1.45 g) in dichloromethane (5 mL). EDCI (2.45 g) was added and the solution was stirred for 60 h. Water (100 mL) was added and the phases were separated. The aqueous phase was extracted with dichloromethane (2 x 40 mL). The organic phases were combined, dried (MgS04), filtered and evaporated to give subtitle compound (3.40 g) that was used without further purification.
MS [M+H]+ (ES+) 340/342
1H NMR δ(CDC13) 4.47 - 4.53 (1H, m), 5.67 (2H, s), 7.33 (1H, d), 6.78 (1H, dd), 7.02 (1H, d), 3.62 - 3.84 (3H, m), 3.44 - 3.52 (1H, m), 3.33 (1H, d), 2.68 - 2.77 (2H, m), 2.54 - 2.64 (2H, m), 1.88 -1.99 (2H, m), 1.73 -1.86 (2H, m).
b)4-[[4-(3,4-Dichlorophenoxy)-l-piperidinyl]carbonyl]-l,2-cyclopentanediol
l-(3-Cyclopenten-l-ylcarbonyl)-4-(3,4-dichlorophenoxy)-piperidine (1.33 g) was dissolved in acetone (30 mL) and water (20 mL). N-methylmorpholine N-oxide (1.12 g) was added followed by a solution of osmium tetroxide (1 mL of 2.5% in 2-methylpropan-2-ol) and the mixture was stirred for 60 h. Aqueous sodium metabisulfite solution (40 mL, saturated) was added followed by dichloromethane (50 mL) and the phases were separated. The organic phase was washed with ammonium chloride solution, dried, filtered and concentrated. The residue was purified by chromatography eluting with dichloromethane: methanol (24:1 then 37:3) to give the subtitle compound as a mixture of isomers: Less polar isomer (0.31 g):
MS [M+H]4 (ES+) 374/376
1H NMR δ(CDC13) 1-79 -1.98 (6H, m), 2.12 - 2.22 (2H, m), 3.23 (1H, tt), 3.49 - 3.56 (1H, m), 3.65 - 3.79 (3H, m), 3.93 (1H, d), 3.99 - 4.08 (3H, m), 4.53 (1H, tt), 6.77 (1H, dd), 7.02 (1H, d), 7.34 (1H, d). More polar isomer (0.71 g):
MS [M+H]+ (ES+) 374/376
1H NMR δ(CDC13) 1.73 -1.86 (2H, m), 1.86 - 2.00 (4H, m), 2.07 - 2.16 (2H, m), 2.50
- 2.60 (2H, m), 3.39 (1H, tt), 3.42 - 3.48 (1H, m), 3.61 - 3.78 (3H, m), 4.22 - 4.27
(2H, m), 4.47 - 4.53 (1H, m), 6.77 (1H, dd), 7.01 (1H, d), 7.33 (1H, d).
c) 4- [[4-(3,4-Dichlorophenoxy)-1 -piperidinyljmethyl]-1,2-cyclopentanediol
The more polar isomer of 4~[[4-(3,4-dichlorophenoxy)-l-piperidinyl]carbonyl]-l,2-cyclopentanediol (0.71 g) was dissolved in a solution of borane in tetrahydrofuran (16 mL of 1M solution) and the mixture was heated to reflux for 1.5 h. Methanol (10 mL) was added and the solution was heated under reflux for1h. The volatile components were evaporated and the residue was loaded onto an HPLC SCX cartridge in methanol and eluted with methanol, then with 0.7M ammonia in methanol to give the title compound (0.73 g) as an oil,
MS [M+H]+ (ES+) 360/362 (standard gradient, retention time 1.33) Similar treatment of the minor isomer of 4-[[4-(3,4-dichlorophenoxy)-l-piperidinyljcarbonyl]-l,2-cyclopentanediol (0.30 g) gave the title compound (0.26 g) as an oil.
MS [M+H]+ (ES+) 360/362 (standard gradient, retention time 1.33)
The following compounds were prepared by analogous routes starting from the appropriate phenoxypiperidine:
(Table Removed)
INTERMEDIATE 4
4-(3,4-Dichlorophenoxy)-1 -(4-piperidinylmethyl)-piperidine a) l,l-Dimethylethyl4-[[4-(3,4-dichlorophenoxy)-l-piperidinyl3methyl]-l-piperidinecarboxylate
4-(3,4-Dichlorophenoxy)piperidine (1.27 g) was dissolved in tetrahydrofuran (20 mL); acetic acid (0.5 mL) and 1,1-dimethyIethyl 4-formyl-l-piperidinecarboxylate (1.43 g) were added to the solution. The reaction mixture was stirred at room temperature for 30 min then sodium triacetoxyborohydride (1.53 g) was added and the mixture was stirred at room temperature overnight. The reaction mixture was poured into 2M sodium hydroxide solution (50 mL) and product was extracted with ether. The ether was washed with brine, dried, filtered and evaporated. Crude material was purified by flash chromatography (eluting with 979 : 20 :1 dichloromethane : methanol: aqueous ammonia) to give the subtitle compound (2.15 g).
MS 443/445 [M+H]+ (ES+)
1HNMR δ(CDC13) 1.06 (2H, add), 1.45 (9H, s), 1.61 -1.82 (5H, m), 1.92 -1.98 (2H,
m), 2.16 - 2.27 (4H, m), 2.65 - 2.73 (4H, m), 4.08 (2H, d), 4.25 (1H, dq), 6.75 (1H, dd), 6.99 (lH,d), 7.30 (1H.d)
b) 4-(3,4-Dichlorophenoxy)-1 -(4-piperidinylmethyl)-piperidine
l,l-Dimethylethyl4-[[4-(3,4-dichlorophenoxy)-l-piperidinyl]methyl]-l-piperidinecarboxylate (1.0 g) was added to a mixture of 20% TFA in dichloromethane (20 mL) and the mixture was stirred at room temperature for Ih. Solvent was removed by evaporation and 2M sodium hydroxide solution (25 mL) was added to the residue. Product was extracted with ethyl acetate. The organic phase was washed with brine, dried, filtered and evaporated to give the title compound (0.5 g). MS 343/345 [M+H]+ (ES+)
1H NMR δ(CDC13) 1.10 (2H, qd), 1.60 (1H, qquintet), 1.73 -1.83 (4H, m), 1.90 - 2.01 (2H, m), 2.16 - 2.26 (4H, m), 2.55 - 2.70 (4H, m), 3.09 (2H, d), 4.24 (1H, dquintet), 6.75 (1H, dd), 6.99 (1H, d), 7.27 (1H, d)
The following intermediates were prepared analogously from the appropriate aryloxy piperidine or arylmethylpiperidine:
(Table Removed)
INTERMEDIATE 9
(4S,5R)-l-[[4-[[4-(3,4-Dichlorophenoxy)-l-piperidinyl]methyl]-l-piperidinyl]acetyl]-3,4-dimethyl-5-phenyl-2-imidazolidinone.
2,6-Lutidine (18.26 mL) was added to a stirred suspension of (4R,5S)-1,5-dimethyl-4-phenylimidazolidin-2-one (27.33 g) in anhydrous tetrahydrofuran (300 mL) at 0°C under nitrogen. Bromoacetyl bromide (11.95 mL) was added over 5 minutes and the mixture was stirred for a further 15 minutes. Saturated aqueous sodium bicarbonate solution (300 mL) was added followed by 4-(3,4-dichlorophenoxy)-l-(4-piperidinylmethyl)piperidine (44.86 g) and the mixture was stirred for 24 hours at ambient temperature. Water (300 mL) was added and the mixture was extracted with tert-butyl methyl ether (300 mL). The organic extracts were dried over anhydrous magnesium sulfate, filtered and evaporated under reduced pressure. The residue was suspended in tert-butyl methyl ether (300 mL) and stirred for 3 days. The resulting solid was filtered, washed with tert-butyl methyl ether (3 X 50 mL) and dried in under reduced pressure to give the title compound (45.65 g) as a solid.
MS (APCI) 573/575 [M+H]+
1HNMR δ(DMSO) 0.67 (3H, d), 1.02 (2H, qd), 1.37-1.45 (1H, m), 1.55-1,62 (4H5 m), 1.85-2.63 (2H, m), 2.02 (1H, t), 2.10 (2H, d), 2.10-2.19 (3H, m), 2.58-2.63 (2H, m), 2.70 (3H, s), 2.78 (2H, d), 3.60 (1H, d), 3.78 (1H, d), 3.96 (1H, dt), 4.39-4.46 (1H, m), 5.28 (1H, d), 6.97 (1H, dd), 7.12 (2H, d), 7.23 (1H, d), 7.27 (1H, t), 7.35 (2H, t), 7.48 (1H, d), (contains 1 equivalent of (4R,5S)-l,5-dimethyl-4-phenyIimidazolidin-2-one).


EXAMPLE 1
(αS)-Methyl4-[[4-(2,4-dichloro-3-methylphenoxy)-l-piperidinyl]methyl]-α-(phenylmethyl)-1 -piperidineacetate
4-[[4-(2,4-Dichloro-3-methylphenoxy)-l-piperidinyl]methyl]-l,2-cyclopentanediol (0.30 g) was dissolved in dichloromethane (7 mL) and sodium carbonate (0.282 g) was added. The suspension was cooled to 0ºC. Lead tetraacetate (0.389 g) was added over 20 minutes. The mixture was stirred for 40 min at 0ºC.
The suspension was filtered through a plug of cotton wool into a solution of L-phenylalanine, methyl ester, hydrochlonde salt (0.173 g), triethylamine (0.13 mL), acetic acid (0.06 mL), sodium triacetoxyborohydride (0.376 g) and tetrahydrofuran (12 mL). The reaction mixture was then stirred for 16 h at room temperature, poured into saturated aqueous sodium bicarbonate solution (50 mL), extracted into ethyl acetate (3x5 mL), washed with brine (50 mL), dried (MgSO4), filtered, and concentrated. The residue was purified by column chromatography eluting with ethyl acetate, and further purified by HPLC (gradient ammonium acetate/acetonitrile 40:60 to 5:95) to give the title compound (0.205 g).
MS [M+H]+ (ES+) 519/521
Examples 2-31 in TABLE I (below) were prepared by the method of Example 1 using the appropriate diol and aminoacid ester precursors.
EXAMPLE 32
(αS) Methyl 4-[[4-[(4-fluorophenyl)methyl]-l-piperidinyl]methyl]-α-(phenylmethyl)-1 -piperidineacetate
To a stirred, ice-cooled solution of methyl-(R)-3-phenyl lactate (0.191 g) and powdered 4A molecular sieves (0.27 g) in dichloromethane (2 mL) was added trifluoromethanesulfonic anhydride (0.195 mL). After 10 min, 2,6-lutidine (0.27 mL) was added dropwise resulting in a deep red colour. The reaction mixture was stirred for 40 min at 0°C. A mixture of 4-[[4-[(4-fluorophenyl)methyl]-l-piperidinyl]methylpiperidine (0.28 g) and 4A molecular sieves (0.1 g) in dichloromethane (1.5 mL) was added. After 2 min, triethylamine (0.323 mL) was added and the reaction was allowed to warm to room temperature overnight. The reaction mixture was diluted with ethyl acetate and filtered.

The filtrate was concentrated in vacua and purified by flash column chromatography, eluting with ethyl acetate to yield a yellow solid (0.53 g).
Retention time: 2.37 min (Standard).
MS 453 [M+H]+ (ES+).
1H NMR δ(CD3OD) 1-43 -1.58 (2H, m), 1.70 - 1.89 (6H, m), 2.31 (1H, td), 2.42 (1H, td), 2.61 (2H, d), 2.80 - 3.03 (9H, m), 3.03 - 3.10 (1H, m), 3.43 - 3.50 (3H, m), 3.55 (3H, s), 7.01 (2H, ddd), 7.14 - 7.28 (7H, m).
Examples 33-35 in TABLE I (below) were prepared by the method of Example 32 using the appropriate amines.
EXAMPLE 36
(αS) Methyl 4-[[4-(3,4-dichlorophenoxy)-l-piperidinyl]methyl]-α-[(2-hydroxyphenyl)methyl]-l-piperidineacetate
(αS) Methyl 4-[[4-(3,4-dichlorophenoxy)-l-piperidinyl]methyl]-α-[(2-methoxyphenyl)methyl]-l-piperidineacetate (120 mg) in dichloromethane (6 mL) was cooled to -78 C under nitrogen, and a 1M solution of boron tribromide in dichloromethane (9 mL) was added dropwise to it. The mixture was then stirred at -78°C for 30 minutes, and then at -5°C for 30 minutes. The reaction mixture was then quenched carefully with methanol (20 mL), allowed to warm to room temperature and the volatiles removed in vacua. The residue was purified by reverse-phase HPLC using 75:25 to 5:95 0.1% aqueous ammonium acetate/ acetonitrile over 6 minutes, symmetry column. This gave 67 mg of the title compound as an oil,
Lc/ms: RT 1.77 (fast), m/z 521/523 (M+H).
EXAMPLE 37
(αS)-4-[[4-(2,4-Dichloro-3-methylphenoxy)-l-piperidinyl]methyl]-α-(phenylmethyl)-1 -piperidineacetic acid
Methyl 4-[[4-(2,4-dichloro-3-methylphenoxy)-l-piperidinyl]methyl]-α-(phenylmethyl)-(α1S)-l-piperidineacetate (Example 1,0.205 g), 6M hydrochloric acid (20 mL), and 2-propanol (5 mL) were heated together at 80°C for 24h, then cooled and concentrated under reduced pressure. The residue was purified by HPLC (gradient ammonium acetate/acetonitrile 75:25 to 5:95) to give the title compound (0.113 g).
MS [M+H]+ (APCI+) 505/507.
1H NMR δ(CD3OD) 1.33 -1.45 (2H, m), 1.71-1.82 (3H, m), 1.84 -1.97 (4H, m), 2.28 (2H, d), 2.35 (3H, s), 2.37 - 2.47 (2H, m), 2.66 - 2.76 (2H, m), 2.87 (2H, q), 3.07 -3.19 (2H, m), 3.40 (1H, d), 3.50 (1H, d), 3.63 (1H, t), 4.35 - 4.44 (1H, m), 6.86 (1H, d), 7.09 - 7.27 (6H, m).
Examples 38-70 in TABLE II (below) were prepared using the method of Example 37 from the appropriate ester (see TABLE I except for Example 58 which was prepared from (±) methyl 4-[r4-(3,4-dichlorophenoxy)-l-piperidinyl]methyl]-α-[(R)-[[(l,l-dimethylethyl)dimethylsilyl]oxy]phenylmethyl]-(α1S)-l-piperidineacetate [1HNMR δ(CDCL3) 0.24 (6H, s), 1.07 (9H, s), 1.35 -1.47 (2H, m), 1.67 - 1.74 (1H, m), 1.88 - 2.06 (4H, m), 2.15 - 2.24 (2H, m), 2.38 - 2.49 (4H, m), 2.60 (1H, t), 2.70 (1H, t), 2.86 - 2.94 (2H, m), 3.12 (1H, d), 3.36 (1H, d), 3.64 (3H, s), 4.36 (1H, q), 4.44 - 4.51 (1H, m), 5.19 (1H,d), 6.99 (1H, dd), 7.23 (1H, d), 7.43 - 7.57 (6H, m)] prepared analogously to Example 1 from the appropriate protected hydroxyaminoacid).
EXAMPLE 71
(αS)-4-[[4-(2,4-Dichloro-3-methylphenoxy)-l-piperidinyl]methyl]-α-(phenylmethyl)-1-piperidineacetic acid, dihydrochloride salt
(αS)-4-[[4-(2,4-Dichloro-3-methylphenoxy)-l-piperidinyl]methyl]-α-(phenylmethyl)- 1-piperidineacetic acid (Example 12,0.062 g) was suspended in acetonitrile (5 mL) and a solution of hydrogen chloride in 1,4-dioxane (4M, 5 mL) was added. The suspension was concentrated under reduced pressure, and the process repeated again, to give the title compound (0.048 g).
MS [M+H]+ (APCI+) 505/507
1H NMR δ(DMSO) 1-43 -1.65 (2H, m), 1.98 - 2.11 (4H, m), 2.18 - 2.30 (3H, m), 2.41 (3H, s), 2.44 - 2.56 (4H, m), 2.99 - 3.13 (6H, m), 3.43 - 3.51 (1H, m), 3.56 - 3.61 (1H, m), 3.64 - 3.74 (1H, m), 4.83 - 4.91 (1H, m), 7.19 (1H, t), 7.27 (3H, d), 7.30 - 7.36 (2H, m), 7.42 (1H, d).
Examples 72-78 in Table II were prepared from the appropriate ester (see Example 1 or TABLE I) following the method of Example 37 and either the salt crystallised from the hydrolysis step and was isolated by filtration or the product after chromatography was converted to the salt following the method of Example 71.
EXAMPLE 79
hydroxyphenyl)methyl]-l-piperidineaceticacid
(αS) Methyl 4-[[4-(3,4-dichlorophenoxy)-l-piperidinyl]methyl]-α-[(2-hydroxyphenyl)methyl]-l-piperidineacetate (Example 36, 67 mg) in methanol (4 mL) was stirred at room temperature under nitrogen. A solution of lithium hydroxide (22 mg) in water (1 mL) was added dropwise to this, keeping the temperature below 30°C. The mixture was then stirred at room temperature for 20 hours. The volatiles were removed in vacuo and the residue was purified by HPLC using a gradient of 95:5 to 5:95 0.1% aqueous ammonium acetate/ acetonitrile to give the title compound as a solid (48 mg).
MS: 505/507 (M+H)
'HNMR δ(CD3OD) 1.19 - 1.37 (2H, m), 1.52 - 1.62 (1H, m), 1.70 - 1.83 (4H, m), 1.94 - 2.03 (2H, m), 2.23 (2H, d), 2.30 (2H, t), 2.42 (1H, t), 2.66 - 2.74 (2H, m), 2.86 (1H, dd), 2.98 - 3.09 (2H, m), 3.15 (2H, d), 3.22 (1H, t), 4.32 - 4.42 (1H, m), 6.42 (1H, t), 6.61 (1H, dd), 6.82 - 6.89 (2H, m), 7.04 (1H, dd), 7.07 (1H, d), 7.36 (1H, d).
EXAMPLE 80
(αS)-4-[[4-(3,4-Dichlorophenoxy)-l-piperidinyl]methyl]-α-(2-thienylniethyl)-l-piperidineacetic acid
4-[[4-(3,4-Dichlorophenoxy)-l-piperidinyl]methyl]-l,2-cyclopentanediol (0.20 g) was dissolved in dichloromethane (10 mL) and sodium carbonate (0.212 g) was added. The suspension was cooled to 0"C. Lead tetraacetate (0.248 g) was added over 20 minutes. The mixture was stirred for 40 min at 0°C.
MS [M+H]+ (ES+) 358/360.
The suspension was filtered through a plug of cotton wool into a solution of α-amino-(α2S)-2-thiophenepropanoic acid (0.94 g) and acetic acid (0.1 mL) in ethanol (10 mL). Sodium triacetoxyborohydride (0.198 g) was added and the reaction mixture was stirred for 16 h at room temperature. The solvent was evaporated and the residue was redissolved in acetonitrile and filtered. This was purified by HPLC (gradient ammonium acetate/acetonitrile 95% to 50%) to give the title compound (0.048 g)
MS [M+H]+ (ES+) 495/497.
1H NMR δ(CD3OD)1.18 - 1.34 (3H, m), 1.52 - 1.61 (1H, m), 1.71 - 1.81 (4H, m), 1.95 - 2.03 (2H, m), 2.21 - 2.25 (2H, m), 2.26 - 2.52 (4H, m), 2.66 - 2.74 (2H, m), 2.91 -3.15 (4H, m), 4.34 - 4.41 (1H, m), 6.83 - 6.90 (3H, m), 7.08 (1H, d), 7.12 (1H, dd), 7.37
Example 81 in TABLE II was prepared following the method of Example 80 using the appropriate amino acid.
EXAMPLE 82
2-[4-[[4-(3,4-Dichlorophenoxy)-l-piperidinyl]methyl]-l-piperidinyI]-2,3-dihydro-lH-indene-2-carboxylic acid
4-[[4-(3,4-Dichlorophenoxy)-l-piperidinyl]methyl]-l,2-cyclopentanediol(0.20g) was dissolved in dichloromethane (10 mL) and sodium carbonate (0.212 g) was added. The suspension was cooled to 0°C. Lead tetraacetate (0.248 g) was added over 20 minutes. The mixture was stirred for 40 min at 0ºC.
MS [M+H]+ (ES+) 358/360.
The suspension was filtered through a plug of cotton wool into a solution of 2-amino-2,3-dihydro-lH-indene-2-carboxylic acid hydrochloride (0.1 17 g), hydrochloric acid (0.1 mL), triethylamine (0.1 mL) and methanol (10 mL). Sodium cyanoborohydride (0.052 g) was added and the reaction mixture was stirred for 16 h at room temperature. The reaction mixture was diluted with saturated sodium bicarbonate solution. The aqueous phase was extracted with dichloromethane. The organic phases were dried (MgSO4), filtered and evaporated and the residue was redissolved in acetonitrile. This was purified by HPLC (gradient ammonium acetate/acetonitrile 95% to 50%). The title compound crystallised from the HPLC fractions and was collected to give pure product (7 mg).
MS [M+Hf (ES+) 503/505.
1HNMR δ(CD3OD) 1.21 - 1.36 (5H, m), 1.55 - 1.62 (1H, m), 1.72 - 1.81 (2H, m), 1.94 - 2.05 (2H, m), 2.16 - 2.25 (2H, m), 2.25 - 2.40 (3H, m), 2.66 - 2.74 (2H, m), 2.90 -3.03 (4H, m), 3.66 (1H, s), 3.70 (1H, s), 4.34 - 4.41 (1H, m), 6.88 (1H, dd), 7.01 - 7.12 (5H, m), 7.37 (1H, d).
EXAMPLE 83
(αS)-4-[[4-(3,4-Dichlorophenoxy)-l-piperidinyl]methyl]-α-[(2-methylphenyl)methyl] -1 -piperidineacetic acid
A solution of lithium hexamethyldisilazide in tetrahydrofuran (1M, 131 mL) was added dropwise over 30 min to a stirred suspension (4S,5R)-l-[[4-[[4-(3,4-dichlorophenoxy)-l-piperidinyl]methyl]-l-piperidinyI]acetyl]-3,4-dimethyl-5-phenyl-2-imidazolidinone (45.65 g) and 2-methylbenzyl bromide (16.3 mL) in anhydrous tetrahydrofuran (130 mL) at -20°C under nitrogen. After a further 20 hours at -20°C, water (300 mL) was added, the mixture was wanned to room temperature and then extracted with tert-butyl methyl ether (300 mL). The organic extracts were dried over anhydrous magnesium sulfate, filtered and evaporated under reduced pressure. The residue was dissolved in tetrahydrofuran (800 mL), then methanol (103 mL) and a solution of lithium hydroxide monohydrate (3.01 g) in water (194 mL) was added. The mixture was stirred at 50°C for 16 hours then further lithium hydroxide monohydrate (3.01 g) was added. After a further 4 hours at 50°C, the mixture was cooled to room temperature. Water (600 mL), TERT-butyl methyl ether (800 mL) and ammonium acetate (200 g) were added. The mixture was stirred rapidly for 3 days then the precipitate was collected by filtration of the two-phase mixture. The solid was washed with water (50 mL) then tert-butyl methyl ether (50 mL) and dried in vacuo at 50°C to give the title compound (8.90 g)
MS (APCI) 503/505 [M-H]
1H NMR δ(CD3OD+NaOD) 1.18-1.35 (2H, m), 1.52-1.62 (1H, m), 1.72-1.82 (4H, m), 2.23 (2H, d), 1.95-2.05 (2H, m), 2.26-2.42 (7H, m), 2.63-2.75 (2H, m), 2.91 (1H, dd), 3.00 (1H, d), 3.05-3.10 (2H, m), 3.15 (1H, dd), 4.37-4.42 (1H, m), 6.88 (1H, dd), 6.98-7.10 (4H, m), 7.21-7.23 (1H, m), 7.37 (1H, d).

Table 1
(Table Removed)
Table 2
(Table Removed)

EXAMPLE 84
Pharmacological Analysis: Calcium flux [Ca 2+]i assay Human eosinophils
Human eosinophils were isolated from EDTA anticoagulated peripheral blood as previously described (Hansel et al., J. Immunol. Methods, 1991,145.105-110). The cells were resuspended (5xlO6 ml/1) and loaded with 5µM FLUO-3/AM + Pluronic F127 2.2µl/ mL (Molecular Probes) in low potassium solution (LKS; NaCl 118mM, MgSO4 0.8mM, glucose 5.5mM, Na2CO3 8.5mM, KC1 5mM, HEPES 20mM, CaCl2 1.8mM, BSA 0.1%, pH 7.4) for one hour at room temperature. After loading, cells were centrifuged at 200xg for 5min and resuspended in LKS at 2.5xl06 mL-1. The cells were then transferred to 96 well FLIPr plates (Poly-D-Lysine plates from Becton Dickinson pre-incubated with 5µM fibronectin for two hours) at 25µl/well. The plate was centrifuged at 200g for 5min and the cells were washed twice with LKS (200µl; room temperature).
A compound of the Examples was pre-dissolved in DMSO and added to a final concentration of 0.1%(v/v)DMSO. Assays were initiated by the addition of an A50 concentration of eotaxin and the transient increase in fluo-3 fluorescence (IEX =490nm and IEM= 520nM) monitored using a FLIPR (Fluorometric Imaging Plate Reader, Molecular Devices, Sunnyvale, U.S.A.).
Compounds of the Examples were found to be antagonists if the increase in fluorescence induced by eotaxin (a selective CCR3 agonist) was inhibited in a concentration dependent manner. The concentration of antagonist required to inhibit the fluorescence by 50% can be used to determine the IC50 for the antagonist at the CCR3 receptor.
EXAMPLE 85 Human eosinophil chemotaxis
Human eosinophils were isolated from EDTA anticoagulated peripheral blood as previously described (Hansel et al.,J. Immunol Methods, 1991,145.105-110). The cells were resuspended at l0xl06 mL-1 in RPMI containing 200IU/ mL penicillin, 200µg/ mL streptomycin sulfate and supplemented with 10% HIFCS, at room temperature.
Eosinophils (700 µl) were pre-incubated for 15 mins at 37° C with 7 µl of either vehicle or compound (l00x required final concentration in 10% DMSO). The chemotaxis
plate (ChemoTx, 3µm pore, Neuroprobe) was loaded by adding 28µl of a concentration of eotaxin 0.1 to l00nM (a selective CCR3 agonist over this concentration range) containing a concentration of a compound according to the Examples or solvent to the lower wells of the chemotaxis plate. The filter was then placed over the wells and 25 µl of eosinophil suspension were added to the top of the filter. The plate was incubated for 1 hr at 37°C in a humidified incubator with a 95% air/5% CO2 atmosphere to allow chemotaxis.
The medium, containing cells that had not migrated, was carefully aspirated from above the filter and discarded. The filter was washed once with phosphate buffered saline (PBS) containing 5 mM EDTA to remove any adherent cells. Cells that had migrated through the filter were pelleted by centrifugation (300xg for 5 mins at room temperature) and the filter removed and the supernatant transferred to each well of a 96-well plate (Costar). The pelleted cells were lysed by the addition of 28 µl of PBS containing 0.5% Triton xl00 followed by two cycles of freeze/thawing. The cell lysate was then added to the supernatant. The number of eosinophils migrating was quantified according to the method of Strath et al., J. Immunol. Methods, 1985, 83,209 by measuring eosinophil peroxidase activity in the supernatant.
Compounds of the Examples were found to be antagonists of eotaxin mediated human eosinophil chemotaxis if the concentration response to eotaxin was shifted to the right of the control curve. Measuring the concentration of eotaxin required to give 50% chemotaxis in the presence or absence of compounds enables the apparent affinity of the compounds at CCR3 to be calculated.
EXAMPLE 86 Guinea-pig isolated trachea
(See for example, Harrison, R.W.S., Carswell, H. & Young, J.M. (1984) European J. Pharmacol., 106,405-409.)
Male albino Dunkin-Hartley guinea-pigs (250 g) were killed by cervical dislocation and the whole trachea removed. After clearing the adherent connective tissue, the trachea was cut into six ring segments each three cartilage bands wide and then suspended in 20 mL organ baths containing Krebs-Henseleit solution of the following composition (mM): NaCl 117.6, NaH2PO4 0.9, NaHCO3 25.0, MgSO41.2, KC15.4, CaCl2 2.6 and glucose 11.1. The buffer was maintained at 37°C and gassed with 5% CO2 in oxygen. Indomethacin (2.8µM) was added to the Krebs solution to prevent development of smooth muscle tone due to the synthesis of cyclo-
oxygenase products. The trachea! rings were suspended between two parallel tungsten wire hooks, one attached to an Ormed beam isometric force transducer and the other to a stationary support in the organ bath. Changes in isometric force were recorded on 2-channel Sekonic flat bed chart recorders. Experimental protocols
At the beginning of each experiment a force of Ig was applied to the tissues and this was reinstated over a 60 minute equilibration period until a steady resting tone was achieved. Subsequently, a cumulative histamine concentration effect (E/[A]) curve was constructed at 0.5 logic unit increments, in each tissue. The tissues were then washed and approximately 30 minutes later, test compound or vehicle (20% DMSO) was added. Following an incubation period of 60 minutes a second E/[A] curve was performed to histamine.
Contraction responses were recorded as a percentage of the first curve maximum. Data analysis
Experimental E/[A] curve data were analysed for the purposes of estimating the potencies (p[A5o] values) of histamine in the absence and presence of the test compound. Affinity (pA2) values of test compounds were subsequently calculated using the following equation:
log(r-l) = log[B]+pA2
where r = [A]50 in presence of test compound/[A]5o in absence of antagonist and [B] is the concentration of test compound. Compounds of the Examples were found to be HI antagonists.
EXAMPLE 87
Histamine HI receptor binding activity of compounds of the invention was assessed by competition displacement of InM [3H]-pyrilamine (Amersham, Bucks, Product code TRK 608, specific activity 30Ci/mmol) to 2/tg membranes prepared from recombinant CHO-K1 cells expressing the human HI receptor (Euroscreen SA, Brussels, Belgium, product code ES-390-M) in assay buffer (50mM Tris pH 7.4 containing 2mM MgCl2,250mM sucrose and l00mM NaCl) for 1 hour at room temperature.
The following compounds of the invention gave inhibition of [3H] pyrilimine binding:

(Table Removed)





WE CLAIM:

1. A novel piperidine derivative of formula (I):






(Formula Removed)






wherein:
Ra and Rb are, independently, hydrogen or C1-4 alkyl or R" forms part of a ring as
defined below;
Rc is hydrogen or hydroxy;
X is CH2, C(O), O, S, S(O). S(O)2 or NR3:
Z is CHRd(CH2)n,
n isO or 1;
Rd is hydrogen, C1-4 alkyl, hydroxy or C1-4 alkoxy;
R1 is hydrogen, C1-6 alkyl, aryl or heterocyclyl;
R2 is aryl or heterocyclyl;
wherein, unless stated otherwise, the foregoing aryl and heterocyclyl moiclics arc
optionally substituted by: halogen, cyano. nitro. hydroxy, oxo. S(O),,R'. OC(O)NR5R6, NR7R8, NR"C(O)R10, NR"C(O)NR12R13 S(O)2NR"R13 NRl6S(O)2R17, C(O)NRl8R|y. C(O)R20. CO:R21. NR22CO2R23. Cu, alkyl. CT,. C , , alkoxy(C1-6)alkyl, C1-6 alkoxy. OCI;3. C|.(, alkoxy(C|.h)alkoxy. C|_(, alkyllhio. C >„ alkenyl, C2-6 alkynyl, C3.10 cycloalkyi (itself optionally substituted by C1-4 alkyl or oxo), methylenedioxy, difluoromethylenedioxy, phenyl. phcnyl(C|i)alk\l. phenoxy, phenylthio, phenyl(C|,4)alkoxy, heterocyclyl, hetcrocyclyl(C|.|)alk\l. heterocyclyloxy or heterocyclyl(C|..i)alkoxy; wherein any of the immcdialcK foregoing phenyl and heterocyclyl moieties are optionally substituted with halogen, hydroxy, nitro, S(O)q(C1-4 alkyl). S(O)2NM2, S(O)2NH(C1-4 alkyl). S(O)2N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for R2 and R4 below), cyano, C1-4 alkyl. C1-4 alkoxy, C(O)NH2. C(O)NH(C1-4 alkyl). C(O)N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for \V and R" below), CO2H, CO2(C1-4 alkyl), NIIC(O)(C1-4 alkyl), NllS(Oh(C1-4 alkyl). C(O)(C1-4 alkyl), CF3 or OCR:


















or Z, R2 and Ra together with the carbon atom to which Z and Ra arc attached form a ring;
p and q are, independently, 0. I or 2;
R5, R6, R7, R\ R9, R10, R". R12. RL\ R1'. R15. R16, R18, R19. R2(). R21 and R" arc. independently, hydrogen, C|.h alkyl (optionally substituted by halogen. hydroxy or C3-10 cycloalkyl), CH2(C2-6 alkenyl). phenyl (itself optionally substituted b> halogen, hydroxy, nitro. NH2. NH(C1-4 alkyl), N(C1-4 alkyl)2 (and these alk>I groups may join to form a ring as described for R11 and R6 below). S(O)2(('i , alkyl), S(O)2NH2, S(O)2NH(C1-4 alkyl). S(O)2N(C1-4 alkyl)2(and these alkyl groups may join to form a ring as described for R5 and R6 below) cyano. C.1-4 alkyl. ( 1 alkoxy, C(O)NH2, C(O)NH(C, 4 alkyl). C(O)N(C1-4 alkyl)2(and these alkyl groups may join to form a ring as described for R5 and R6 below), CO211. CO2(C1-4 alkyI). NHC(O)(C1-4 alkyl), NHS(O)2(C1-4 alkyl). C(O)(C1-4 alkyl). CF2 or OCF3) or heterocyclyl (itself optionally substituted by halogen, hydroxy, nitro. NH2. NH(C1-4 alkyl), N(C|4 alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 below), S(O)2(C1-4 alkyl). S(O)2NII2. S(O)2NI l(C1-4 alky]). S(O)2N(C1-4 alkyl)2(and these alkyl groups may join to form a ring as described for R5 and R6 below), cyano, C1-4 alkyl. C1-4 alkoxy, C(O)NII2. C(O)NII(C1-4 alk>l). C(O)N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 below), COzH, C()2(C1-4 alkyl), NI1C(O)(C1-4 alkyl). NIIS(O)?(('I , alkyl), C(O)(C1-4 alkyl), CF3 or CXTI-',):
alternatively NR5R6, NR7R8, NRI2R13. NR"RI5, NRl!,R|y, may. independently. form a 4-7 membered heterocyclic ring, azetidine, pyrrolidine, piperidine. a/epine. morpholine or piperazine, the latter optionally substituted by C|_4 alkyl on the distal nitrogen;
R1, R17 and R23 are, independently. C1-6 alkyl (optionally substituted by halogen, hydroxy or C3.10 cycloalkyl). CH2(C2-6 alkenyl), phenyl (itself optionally substituted by halogen, hydroxy, nitro. NH2. NH(C1-4 alkyl). N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 above). S(O)2(C1-4 alkyl), S(O)2NH2, S(O)2NH(C1-4 alkyl), S(O)2N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for R3 and R6 above), cyano. C1-4 alkyl, C1-4 alkoxy, C(O)NH2, nO)NM(CY, alkyl), C(O)N(C1-4 alkyl)2 (and these alkyt groups may join to form a ring as described for R5 and R6 above). CO2H CO2(C1-4 alkyl), NHC(O)(C1-4 alkyl). NHS(O)2(C1-4 alkyl). C(O)(C1-4 alkyl). Cl2

or OCF3) or heterocyclyl (itself optionally substituted by halogen, hydroxy, nilro. NH2, NH(C|4 alkyl), N(C1-4 alkyl)2(and these alkyl groups may join to form a ring as described for R5 and R(1 above), S(O)2(C1-4 alkyl), S(O)2N1I2. S(ObNII(C'i , alkyl), S(O)2N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for R5 and R6 above), cyano. C1-4 alkyl. C1-4 alkoxy. C(O)NIK C(O)NH(C1-4 alkyl), C(O)N(C1-4 alkyl)2 (and these alkyl groups may join to form a ring as described for Rs and R(1 above). C()2II, CO2(C1-4 alkyl). NMC(O)(C. , alkyl), NHS(O)2(C1-4 alkyl), C(O)(C1-4 alkyl), CI-i or OCF3); R3 is hydrogen, C1-6 alkyl or benzyl;
or an N-oxide thereof; or a pharmaceutical ly acceptable salt thereof: or a solvate thereof.
A compound of formula (I) as claimed in claim I wherein X is O.
A compound of formula (I) as claimed in claim 1 wherein the aryl and hclerocycly I moieties of R1 and R2 are, independently, optionally substituted by: halogen, cyano, nitro, hydroxy, oxo, S(O)pR4. OC(O)NRsR6. NR7R8. NRl)C(O)R"'. NR11C(O)NRI2R13, S(O)2NR14R15 NR16S(O)2R17. C(O)NRIHR19. ('(O)R'. CO2R21, NR22CO2R23, C1-6 alkyl. CF3, C1-6 alkoxy(C1-6)alkyl, C1-6 alkoxy or (XT,: p is 0, 1 or 2; R5, R6, R7, Rx. Ry. RH). R11, RI:. R13, R11, R,S. R"\ RIK. R1*. R". R ' and R22 are, independently, hydrogen. Cu, alkyl (oplionally substituted by halogen) or phenyl (itself optionally substituted by halogen, hydroxy, nitro. NIK Nll(( i i alkyl), N(C1-4 alkyl)2, S(O)2(C1-4 alkyl). S(O)2NII2. S(O)2NII(C1-4 alk\l). S(O)2N(C1-4 alkyl)2, cyano, C1-4 alkyl, C1-4 alkoxy, C(O)NH2. C(O)NII(C1-4 alkyl). C(O)N(C1-4 alkyl)2, CO2H. CO2(C1-4 alkyl). NHC(O)(C1-4 alkyl). NI IS(O)2(C1-4 alkyl), C(O)(C1-4 alkyl), CF3 or OCl3): and R4. R17 and R23 arc. independently. C1-6 alkyl (optionally substituted by halogen) or phenyl (itself oplionally substituted n\ halogen, hydroxy, nitro, NM2. NH(C1-4 alkyl). N(C1-4 alkyl)2. S(O)2(C1-4 alkyl). S(O)2NH2, S(O)2NH(C1-4 alkyl), S(O)2N(C1-4 alkyl)2. cyano, C1-4 alkyl. C, , alkoxy. C(O)NH2, C(O)NH(C1-4 alkyl). C(O)N(C1-4 alkyl)2. CO2H. CO2(C1-4 alkyl). NHC(O)(C1-4 alkyl), NHS(O)2(C1-4 alkyl). C(O)(C1-4 alkyl). CF3 or (XI',).
A compound of formula (I) as claimed in claim I wherein R1 is phenyl optionally substituted with halogen, cyano. C1-4 alkyl or C1-4 alkoxy.

5. A compound of formula (I) as claimed in claim I wherein R" is hydrogen.
6. A compound of formula (I) as claimed in claim 1 wherein Rb is hydrogen or methyl.
7. A compound of formula (I) as claimed in claim 1 wherein RL is hydrogen.
8. A compound of formula (1) as claimed in any preceding claim wherein RJ is hydrogen, hydroxy or C1-4 alkyl.
9. A compound of formula (I) as claimed in any preceding claim wherein / is CI I -. CM2CH2, CHCHsorCIIOIl.
10. A compound of formula (I) as claimed in any preceding claim wherein R~ is phen\ 1 or heterocyclyl optionally substituted by halogen, cyano. nitro, hydroxy. NR7 R8 C1-6 alkyl (optionally substituted with halogen), C1-6 alkoxy (optionally substituted with halogen), S(O)p(C1-6 alkyl). S(O)rCF3 or S(O)2NR14R15 p and r are independently, 0, 1 or 2; and R7, R8, R14 and R15 are, independently, hydrogen. C1-6 alkyl (optionally substituted by halogen, hydroxy or C3-10 cycloalkyl). CH2(C2-6 alkenyl), phenyl (itself optionally substituted by halogen, hydroxy, nitro. NIK NH(C1-4 alkyl), N(C1-4 alkyl)2. S(O)2(C1-4 alkyl), S(O)2NII2, S(O)2NII(C1-4 alk\l). S(O)2N(C1-4 alkyl)2(and these alkyl groups may join to form a ring as described lor R7 and R8 below), cyano, C1-4 alkyl, C1-4 alkoxy, C(O)NH2, C(O)NII(C| 1 alk\l). C(O)N(C1-4 alkyl)2(and these alkyl groups may join to form a ring as described lor R7 and R8 below), CO2H, CO2(C1-4 alkyl). NHC(O)(C1-4 alkyl). NI1S(O)2(C1-4 alkyl), C(O)(C1-4 alkyl), CF3 or OCT,) or heterocyclyl (itself optionally substituted by halogen, hydroxy, nitro, NH2. NII(C1-4 alkyl), N(CI_I alkyl)2. S(O):(C, , alk\l). S(O)2NH2, S(O)2NH(C1-4 alkyl). S(O)2N(C1-4 alkyl)2 (and these alkyl groups max join to form a ring as described for R7 and R8 below), cyano, C1-4 alkyl. C 1 1 alkoxy, C(O)NH2, C(O)NH(C1-4 alkyl). C(O)N(C1-4 alkyl)2 (and these alkvl groups may join to form a ring as described for R and R below). CC)21I. CO2(CYi alk\l). NHC(O)(C1-4 alkyl), NHS(O)2(C1-4 alkyl), C(O)(C1-4 alkyl). CT, or OCI",): or alternatively NR7R8 or NR14'R15 may. independently, form a 4-7 membered

heterocyclic ring, azetidine, pyrrolidine, piperidine, azcpine. morpholinc or piperazine, the latter optionally substituted by C1-4 alkyl on the distal nitrogen.
11. A compound of formula (I) as claimed in any preceding claim wherein R" is phcnyl or heterocyclyl optionally substituted by halogen, cyano. hydroxy. C1-4 alkyl. C1-4 haloalkyl or C1-4 alkoxy.
12. A compound of formula (I) as claimed in any preceding claim wherein heterocyclyl is indolyl, imidazolyl, thienyl or pyridinyl.
13. A process for preparing a compound of formula (I) as claimed in claim I comprising:
a. reacting a compound of formula (II):



(Formula Removed)

with a compound of formula (111):




(Formula Removed)



in the presence of NaBH(OAc)3 or NaBH3(CN) in a suitable solvent al a suitable temperature:
b. when Rb is not hydrogen, reacting a compound of formula (II) wilh a
compound of formula (111), where Rh is not hydrogen, in the presence of
NaBH(OAc)3 in the presence of a suitable base in a suitable solvent ai a
suitable temperature:
c. when Ra represents H, reacting a compound of formula (IX):

(Formula Removed)


with a compound of formula (X):


(Formula Removed)

(X) wherein L is a suitable leaving group, in a suitable solvent, at a temperature in the range 0°C to 30°C, in the presence of a base.
14. A pharmaceutical composition which comprises a compound of the formula (1). or a pharmaceutically acceptable salt thereof or solvate thereof as claimed in claim 1. and a pharmaceutically acceptable adjuvant, diluent or carrier.

Documents:

4237-DELNP-2005-Abstract-(23-09-2008).pdf

4237-delnp-2005-abstract.pdf

4237-DELNP-2005-Claims-(23-09-2008).pdf

4237-DELNP-2005-Claims-(24-12-2008).pdf

4237-delnp-2005-claims.pdf

4237-DELNP-2005-Correspondence-Others-(23-09-2008).pdf

4237-DELNP-2005-Correspondence-Others-(24-12-2008).pdf

4237-delnp-2005-correspondence-others.pdf

4237-delnp-2005-description (complete).pdf

4237-DELNP-2005-Form-1-(23-09-2008).pdf

4237-delnp-2005-form-1.pdf

4237-delnp-2005-form-13-(23-09-2008).pdf

4237-delnp-2005-form-18.pdf

4237-DELNP-2005-Form-2-(23-09-2008).pdf

4237-DELNP-2005-Form-2-(24-12-2008).pdf

4237-delnp-2005-form-2.pdf

4237-DELNP-2005-Form-26-(23-09-2008).pdf

4237-delnp-2005-form-26.pdf

4237-DELNP-2005-Form-3-(23-09-2008).pdf

4237-delnp-2005-form-3.pdf

4237-DELNP-2005-Form-5-(23-09-2008).pdf

4237-delnp-2005-form-5.pdf

4237-delnp-2005-pct-210.pdf

4237-delnp-2005-pct-304.pdf

4237-DELNP-2005-Petition-137-(23-09-2008).pdf

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Patent Number 227505
Indian Patent Application Number 4237/DELNP/2005
PG Journal Number 05/2009
Publication Date 30-Jan-2009
Grant Date 12-Jan-2009
Date of Filing 20-Sep-2005
Name of Patentee ASTRAZENECA AB
Applicant Address S-151 85 SODERTALJE SWEDEN.
Inventors:
# Inventor's Name Inventor's Address
1 CAFFREY MOYA ASTRAZENECA R & D CHARNWOOD, BAKEWELL ROAD LOUGHBOROUGH, LEICESTERSHIRE LE11 5RH GREAT BRITAIN
2 LUCKHURST CHIRSTOPHER ASTRAZENECA R & D CHARNWOOD, BAKEWELL ROAD LOUGHBOROUGH, LEICESTERSHIRE LE11 5RH GREAT BRITAIN
3 MOCHEL TOBIAS ASTRAZENECA R & D CHARNWOOD, BAKEWELL ROAD LOUGHBOROUGH, LEICESTERSHIRE LE11 5RH GREAT BRITAIN
4 PERRY MATTHEW ASTRAZENECA R & D CHARNWOOD, BAKEWELL ROAD LOUGHBOROUGH, LEICESTERSHIRE LE11 5RH GREAT BRITAIN
5 SPRINGTHORPE BRIAN. ASTRAZENECA R & D CHARNWOOD, BAKEWELL ROAD LOUGHBOROUGH, LEICESTERSHIRE LE11 5RH GREAT BRITAIN
PCT International Classification Number C07D 211/26
PCT International Application Number PCT/SE2004/000489
PCT International Filing date 2004-03-30
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 0300957-8 2003-04-01 Sweden