Title of Invention

IMIDAZOQUINOLINE DERIVATIVES AS ADENOSINE A3 RECEPTOR LIGANDAS

Abstract Compounds of general formula (I), wherein X, Z, R1-R10, m, n, o, p, r as described in the description are strong adenosine A3 receptor ligands preferably antagonists.
Full Text IMIDAZOQUINOLINE DERIVATIVES AS ADENOSINE A3 RECEPTOR LIGANDS
The present invention relates to the adenosine A3 receptor ligands of the
general formula (I),

within those preferably to the antagonists, as well as to their salts, solvates and
isomers, to the pharmaceutical compositions containing them, to the use of the
compounds of the general formula (I) and their salts, solvates and isomers, and to
the preparation of the compounds of the general formula (I) and their salts, solvates
and isomers.
Adenosine is a well-known component of several endogenous molecules
(ATP, NAD+, nucleic acids). Besides, it plays an important regulatory role in many
physiological processes. The effect of adenosine on heart function was discovered
already in 1929. (Drury and Szentgyorgyi, J Physiol 68:213, 1929). The
identification of an increasing number of physiological functions mediated by
adenosine and the discovery of new adenosine receptor subtypes give possibilities
for therapeutic application of specific ligands (Poulse, S. A. and Quinn, R. J.
Bioorganic and Medicinal Chemistry 6:619, 1998)

To date, the receptors for adenosine have been classified into three main
classes: A1, A2 and A3. The A1 subtype is partly responsible for the inhibition of the
adenylate cyclase by coupling to G1 membrane protein, partly influences other
second messenger systems. The A2 receptor subtype can be subdivided into two
further subtypes - A2a and A2b -, which stimulate the adenylate cyclase activity. The
sequence of adenosine A3 receptors have been recently identified from rat testis
cDNA library. Later it was proved that it corresponds to a novel, functional
adenosine receptor. The activation of the A3 receptors is connected also with several
second-messenger systems: inhibiting of adenylate cyclase, stimulating
phospholipase C and D.
The adenosine receptors are found in several organs and regulate their
functions. Both A1 and A2a receptors play important role in the central nervous
system and cardiovascular system. In the CNS, the adenosine inhibits the release of
synaptic transmitters which effect is mediated by A1 receptors. In the heart, also the
A1 receptors mediate the negative inotropic, chronotropic and dromotropic effects of
adenosine. The adenosine A2a receptors, which are located in a relatively high
amount in the striatum, display functional interaction with the dopamine receptors in
regulating the synaptic transmission. The A2a adenosine receptors on endothelial and
smooth muscle cells are responsible for adenosine-induced vasodilation.
On the basis of mRNA identification, the A2b adenosine receptors are widely
distributed in different tissues. They have been identified almost in every cell type,
but its expression is the highest in the intestine and the bladder. This subtype
probably also has important regulatory function in the regulation of the vascular
tone and plays a role in the function of mast cells.
Contrary to A1 and A2a receptors, where the tissue distribution was detected
on the protein level, the presence of A2b and A3 receptors was detected on the basis
of their mRNA level. Expression levels for A3 adenosine receptors are rather low
compared to other subtypes and are highly species dependent. A3 adenosine
receptors are expressed primarily in the central nervous system, testis and immune

system, and appear to be involved in the modulation of mediator release from mast
cells in immediate hypersensitivity reaction.
The A3 antagonists published so far in the literature belong to the groups of
flavonoides, 1,4-dihydropyridine derivatives, triazoloquinazolines,
thiazolonaphthyridines and thiazolopyrimidines. The present invention relates to a
novel type of effective A3 antagonists, which have the aminoquinoline structure.
For therapeutic use it is essential to ensure that the molecule does not bind, or
bind only in the case of very high concentration, to the A1, A2a and A2b sub-types of
the adenosine receptor. Our present invention relates to the compounds of the
general formula (I) as well as their salts, solvates and isomers, which have great
selectivity for the A3 sub-type of the adenosine receptor.
Our aim was to prepare A3 ligands, within them preferably antagonists, first
of all with quinoline structure, which exert strong antagonistic effect and high
selectivity for the A3 receptor, i.e. they inhibit the A3 receptor in much lower
concentration than they inhibit the A1, A2a and A2b receptors. Further aims were to
have stability, bioavailability, therapeutic index and toxicity data, enabling these
new compounds to develop into drug substances, and that the new compounds
possess favourable enteric absorption to be applied orally.
We have found that the compounds of the general formula (I),


- wherein
R1 stands for hydrogen atom or a straight or branched C1-4 alkyl group;
R2 stands for hydrogen atom or a straight or branched C1-4 alkyl group;
R3 stands for hydrogen atom, or a straight or branched C1-4 alkyl group, C3.6
cycloalkyl group, a phenyl-, thienyl-, or furyl group, optionally substituted
with one or more straight or branched C1-4 alkyl group, straight or branched
C1-4 alkoxy group, or halogen atom; a six- or five-membered heteroaromatic
ring containing one, two or three nitrogen atoms, or a five-membered
heteroaromatic ring containing one nitrogen atom and one oxygen atom, or
one nitrogen atom and one sulphur atom, optionally substituted with one or
more straight or branched C1-4 alkyl group, straight or branched C1-4 alkoxy
group or halogen atom;
R4, R5, R6 and R7 independently stand for hydrogen atom, straight or branched C1-4
alkyl group, straight or branched C1-4 alkoxy group, hydroxy group or
halogen atom, or R4 and R7 stand for hydrogen atom and R5 and R6 form
together a methylenedioxy group;
R8 stands for hydrogen atom or a cyano group, aminocarbonyl group, C1-4
alkoxycarbonyl group, or carboxy group;
R9 and R10 independently stand for hydrogen atom, straight or branched C1-4 alkyl
group, C3-6 cycloalkyl group.
X stands for -CH2- group, -NH- group, -NR11- group, or sulphur atom, oxygen
atom, sulpho group or sulphoxy group -wherein R11 stands for straight or
branched C1-4 alkyl group or C3-6 cycloalkyl group;
Z means ovygen atom, sulphur atom, -NH- group or -NR12- group, - wherein
R12 stands for straight or branched C1-4 alkyl group or C3-6 cycloalkyl group;
m stands for zero, 1, 2 or 3;
11 stands for zero, 1 or 2;
o stands for zero, 1, 2 or 3;
p stands for zero or 1,

r stands for zero or 1, with the proviso that at least one of m and o is different
from zero,
and their salts, solvates, and isomers, as well as the salts and solvates thereof
fulfil the above criteria.
Detailed meanings of the above listed substituents are as follows:
By a straight or branched C1-4 alkyl group we mean methyl-, ethyl-,
propyl-, isopropyl-, butyl-, isobutyl-, secondary-butyl-, terciary-butyl-, preferably
ethyl- or methyl group.
By a straight or branched C1-4 alkoxy group we mean methoxy-, ethoxy-,
propoxy-, isopropoxy-, butoxy-, isobutoxy-, secondary-butoxy-, terciary-butoxy-,
preferably ethoxy- or methoxy group.
By a C3-6 cycloalkyl group we mean cyclopropyl-, cyclobutyl-, cyclopentyl-
or cyclohexyl group.
The heteroaromatic ring containing one or two or three nitrogen atoms means
pyrrole, imidazole, pyrazole, 1,2,3-triazole, 1,2,4-triazole, pyridine, pyrimidine,
pyridazine, pyrazine and 1,3,4-triazine ring. The ring is optionally substituted by a
C1-4 alkyl, or alkoxy group or by a halogen atom.
The heteroaromatic ring containing one nitrogen atom and one oxygen or
sulphur atom means oxazole, isoxazole, thiazole, isothiazole ring. The ring is
optionally substituted by a C1-4 alkyl, or alkoxy group or by a halogen atom.
The -(CH2)m-Z-(CH2)o- group forms together with the nitrogen atom an
oxaziridino-, diaziridino-, 1,2-diazetidino-, 1,3-diazetidino-, isoxazolidino-,
oxazolidino-, imidazolidino-, pirazolidino-, thiazolidino-, morpholino,
piperazino-, or 4-methyl-piperazino-group, optionally substituted with a C1-4 alkyl
group or C3-6 cycloalkyl group.
By salts of the compounds of the general formula (I) we mean salts given
with inorganic and organic acids and bases. Preferred salts are those given with
pharmaceutically accepted acids, as for instance hydrochloric acid, sulphuric acid,
ethanesulphonic acid, tartaric acid, succinic acid, malic acid, citric acid, and with

pharmaceutically accepted bases, as for instance sodium hydroxide, potassium
hydroxide, ethanolamine.
By solvates we mean solvates given with various solvents, as for instance
with water or ethanol.
The compounds of the general formula (I) show geometric and optical
isomerism, therefore the invention also relates to mixtures of the geometric isomers,
to racemic or optically active geometric isomers, as well as to their salts and
solvates.
A favoured group of the compounds of the general formula (I)

are those, wherein
R1 stands for hydrogen atom or a straight or branched C1-4 alkyl group;
R2 stands for hydrogen atom or a straight or branched C1-4 alkyl group;
R3 stands for hydrogen atom, or a straight or branched C1-4 alkyl group, C3-6
cycloalkyl group, a phenyl-, thienyl-, or furyl group, optionally substituted
with one or more straight or branched C1-4 alkyl group, straight or branched
C1-4 alkoxy group, or halogen atom;
R4, R5, R6 and R7 independently stand for hydrogen atom, straight or branched C1-4
alkyl group, straight or branched C1-4 alkoxy group, hydroxy group or

halogen atom, or R4 and R7 stand for hydrogen atom and R5 and R6 form
together a methylenedioxy group;
R8 stands for hydrogen atom or a cyano group, aminocarbonyl group, C1-4
alkoxycarbonyl group, or carboxy group;
R9 and R10 independently stand for hydrogen atom, straight or branched C1-4 alkyl
group, or C3-6 cycloalkyl group.
X stands for -CH2- group, -NH- group, -NR11- group, or sulphur atom, oxygen
atom, sulpho group or sulphoxy group -wherein R11 stands for straight or
branched C1-4 alkyl group or C3-6 cycloalkyl group;
Z means oxygen atom, sulphur atom, -NH- group or -NR12- group, - wherein
R12 stands for straight or branched C1-4 alkyl group or C3-6 cycloalkyl group;
m stands for zero, 1, 2 or 3;
n stands for zero, 1 or 2;
o stands for zero, 1, 2 or 3;
p stands for zero or 1,
r stands for zero or 1, with the proviso that at least one of m and o is different
from zero,
and their salts, solvates, and optically active isomers, as well as the salts and
solvates thereof.
A more favoured group of the compounds of the general formula (I)


are those wherein
R1 stands for hydrogen atom or methyl group;
R2 stands for hydrogen atom or methyl group;
R3 stands for phenyl-, thienyl-, or furyl group;
R4, R5, R6 and R7 independently stand for hydrogen atom, straight or branched C1-4
alkyl group, straight or branched C1-4 alkoxy group, hydroxy group or
halogen atom, or
R4 and R7 stand for hydrogen atom and R5 and R6 form together a methylenedioxy
group;
R stands for hydrogen atom or a cyano group;
R9 and R10 stand for hydrogen atom, methyl- ethyl-, or cyclopropyl group.
X stands for -NH- group or oxygen atom;
Z means oxygen atom, sulphur atom, -NH- group or -NR12- group. - wherein
R12 stands for straight or branched C1-4 alkyl group or C3-6 cycloalkyl group;
and
m stands for 2;
n stands for 1;
o stands for 2;
p stands for zero;

r stands for zero,
and their salts, solvates, and isomers, as well as the salts and solvates thereof.
Especially favoured are the following compounds which fulfil the above
criteria:
1-(9-Benzylamino-10-cyano-imidazo[1,2-a]quinoline-2-carbonyl)-4-
methylpiperazine
1-(9-Benzylamino-10-cyano-imidazo[1,2-a]quinoline-2-carbonyl)morpholine
1-(9-Furfurylamino-10-cyano-imidazo[1,2-alquinoline-2-carbonyl)-4-
methylpiperazine
1-(9-Furfurylamino-10-cyano-imidazo[1,2-a]quinoline-2-
carbonyl)piperazine:
1-(9-Furfurylamino-10-cyano-imidazo[1,2-a]quinoline-2-
carbonyl)morpholine
1-(9-Tenylamino-10-cyano-imidazo[1,2-a]quinolin-2-carbonyl)morpholine
1-(9-Tenylamino-10-cyano-imidazo|[1,2-alquinoline-2-carboniy)piperazine
and their salts, solvates and isomers, as well as the salts and solvates thereof.
The present invention also relates to pharmaceutical compositions containing
as active principles the compounds of the general formula (I) or their isomers, salts
and solvates, which are preferably oral compositions, but inhalable, parenteral and
transdermal formulations are also subjects of the invention. The above
pharmaceutical compositions may be solids or liquids, such as tablets, pellets,
capsules, patches, solutions, suspensions or emulsions. The solid compositions, first
of all tablets and capsules are preferred.
The above pharmaceutical compositions are prepared by applying usual
pharmaceutical auxiliary materials and by using standard methods.
The compounds of the general formula (I) can be used for the treatment of
pathologies, where A3 receptor plays a role in the development of the disease.

The compounds having selective activity on the A3 receptor can be used in
the therapeutic and/or preventive treatment of disfunctions of the heart, kidney,
respiratory system, central nervous system. They block the protective effect of
adenosine on the growing tumoric cells, prevent degranulation of the mast cells,
hinder the formation of cytokines, decrease the inner pressure in the eye, prevent the
TNFa liberation, hinder the migration of the eozinofil and neutrofil granulocytes
and of other inflammation cells, prevent the constriction of the trachea and prevent
the blood plasm to pass through the wall of the blood-vessel.
Based on the above effects, adenosine A3 receptor antagonists may be
therapeutically useful as antiinflammatory, antiasthmatic, antiischemic,
antidepressive, antiarrhythmic, kidney function protective, tumor preventing,
antiparkinson and cognitive function stimulating drugs. They may also be useful in
the treatment or prevention of the following diseases: injury of the heart muscle
during reperfusion, chronic obstructive pulmonary disease (COPD), adult
respiratory insufficiency (ARDS) - including chronic bronchitis, pulmonary
emphysema or difficult breathing -, allergic reactions (e.g. rhinitis, poison ivy-
induced responses, nettle-rush, scleroderma, arthritis), other autoimmune diseases,
inflammatory bowel diseases, Addison disease, Crohn disease, psoriasis, diseases of
the joints, hypertonia, abnormal neurological functions, glaucoma and diabetes (K.
N. Klotz, Naunyn-Schmiedberg's Arch. Pharmacol. 362:382, 2000; P. G. Baraldi es
P. A. Borea, TiPS 21:456, 2000).
The compounds of the present invention can favourably be used in the
treatment of disfunctions like asthma, COPD and ARDS, glaucoma, tumor, allergic
and inflammatory diseases, ischemie, hypoxia, arrhythmia of the heart, and diseases
of the kidney.
The present invention relates furthermore to the use of the compounds of the
general formula (I) in the treatment of the above pathologies. The suggested daily
dose is 0.1 - 1000 mg active ingredie, depending on the nature and severeness of the
disease and on the sex, weight etc. of the patient.

A further subject of the invention is the preparation of the compounds of the
general formula (I).
The substituents in the formulae of the intermediates of the general formulae
(II), (III), (IV), (V),.(VI), (VII) and (VIII) have the meanings as defined above.
In the process according to our invention the compounds of the general
formula (VIII)

are acylated with the acids or their reactive derivatives of the general formula (II),

by applying an acylation method known in the organic chemistry. As for acylating
agent, acid halogenides or mixed anhydrides are preferbly used. The resulting
compound of the general formula (I)


is -if desired- transformed into one of its salts or solvates, Or liberated from its salt
or solvate and separated into its geometric or optical isomers.
The substituents of the compounds of the general formula (I) may be
transformed into each other, by known methods.
The mixed anhydride used for the acylation reaction can be prepared with
pivaloyl chloride, favourably by using organic bases dissolved in chloroform,
preferably by using triethylamine, but other methods known in the organic chemistry
can also be applied. Acylation can be performed in a broad temperature range,
preferably between 0 °C and 100 °C.
The intermediates of the general formula (II)


-wherein the meanings of R1, R2, R3, R4, R5, R6, R7, R8, X and n are as defined
above - can be obtained by several known methods, for example by the method
demonstrated in Scheme 1.


starting from the compounds of the general formula (III)

and applying a hydrolysis method known in the organic chemistry. As for
hydrolysing agent alkali hydroxides can be used, but other compounds promoting
the hydrolysis of esters can also be applied.
The compounds of the general formula (III)

- wherein the meanings of Rl, R2, R3, R4, R5, R6, R7, R8, X and n are as defined
above, and R13 means a C1-4 alkyl group, can be prepared from the compounds of
the formula (IV)


- by using methods known per se. (I. R. Ager and R. Westwood, J. Med. Chem. 31,
1098, 1988).
The compounds of the general formula (IV)

- wherein the meanings of R1, R2, R3, R4, R5, R6, R7, R8, X and n are as defined
above, can be prepared from the compounds of the formula (V)

- by using methods known per se (Nan Zhang, Bioorg. and Med. Chem. Lett., 10,
2825, 2000).

The compounds of the general formula (V)

- wherein the meanings of R4, R5, R6, R7 and R8 are as defined above, can be
prepared from the compounds of the formula (VI)

- by using methods known per se (D. L. Leysen, J. Heterocyclic Chem., 24, 1611,
1987).
The compounds of the general formula (VI)

- wherein the meanings of R4, R5, R , R7 and R8 are as defined above, can be
prepared by using methods known per se (Pfizer (Inc) USP 4,175,193).

The compounds of the invention, of the general formulae (I), (II), (III), (IV)
and (V), their preparation and biological activity are demonstrated by the following
Examples, without limiting the claims to the Examples.

Examples
Example 1
1-(9-Benzylamino-10-cyano-imidazo[1,2-a]quinoline-2-carbonyl)-4-methyl-
piperazine:
In the general formula (I) R1 and R2 stand for hydrogen atom, R3 for phenyl group,
R4, R5, R6 and R7 for hydrogen atom, R8 for cyano group, R12 for methyl group, X
means -NH-group, Z means nitrogen atom, the value of n is 1, the value of m and o
is 2, and the value of r and p is 0.
a.) 2-Amino-3-cyano-4-chloroquinoline:
The mixture of 10 g of 2-amino-3-cyano-4-hydroxyquinoline and 15 ml of
phosphoryl chloride is heated under stirring at 110 °C. The reaction mixture is
cooled down, poured onto 100 ml of ice-water and neutralized with 60 ml of 10 %
sodium hydroxide solution. The resulting yellow precipitate is filtered off, washed
with 50 ml of water. After drying 7.5 g of the title compound is obtained, mp.: 210
°C.
NMR, δH (400 MHz, DMSO-d6): 7.21 ppm, (s, 2H, NH2), 7.35-7.40 ppm, (dd, 1H,
6-H), 7.53-7.57 ppm, (d, 1H, 5-H), 7.70-7.75 ppm, (dd, 1H, 7-H), 7.93-7.98 ppm,
(d, 1H, 8-H)
b.) 2-Amino-3-cyano-4-benzylaminoquinoline
5 g of 2-amino-3-cyano-4-chloroquinoline and 11 ml of benzylamine are heated
under stirring at 130 °C. The reaction mixture is poured onto 50 ml of water, the
resulting precipitate is filtered off, washed with 50 ml of water. The pale-yellow
precipitate is recrystallized from 25 ml of dimethylformamide to obtain 5.2 g of the
title compound. Mp.: 206 °C.
NMR, δH(400 MHz, DMSO-d6): 5.02-5.03 ppm, (d, 2H, N-CH2), 6.22 ppm,
(s, 2H, NH2), 7.14-7.16 ppm, (dd, 1H, 6-H), 7.24-7.26 ppm,(dd,lH, 5-H), 7.30 ppm,
(s, 5H, Ph), 7.50-7.52 ppm, (dd, 1H, 7-H), 8.16-8.19 ppm, (d, 1H, 8-H), 8.30-8.33
ppm,(t, 1H,NH).

Using 2-aminomethylpyridine or 3-aminomethyIpyridine or 4-
aminomethylpyridine instead of benzylamine, the appropriate compounds of the
general formula IV can be obtained.
c. Ethyl 9-benzylamino-10-cyano-imidazo[1,2-a]quinoline-2-carboxylate
monohydrate:
To the solution of 2.74 g of 2-amino-3-cyano-4-benzylaminoquinoline in 100
ml of abs. Ethanol, 2.14 g of ethyl bromopyruvate is added under stirring at 70 °C.
The reaction mixture is heated under reflux for 2 hours, the resulting precipitate is
filtered off. The white crystals are recrystallized from 120 ml of acetonitrile. 1.1 g of
the title compound is obtained, m.p.: 112-114 °C.
NMR, δH (400 MHz, DMSO-d6): 1.32 ppm (t. 3H, COOCH2CH3), 4.30 ppm
(q, 2H, COOCH2CH3), 5.09 ppm (d, 2H, PhCH2), 7.25-7.38 ppm (m, 5H), 7.64-7.67
ppm (m, 1H), 7.85-7.88 ppm (m, 1H), 8.43-8.53 ppm (m, 3H), 9.04 ppm (s, 1H, 3-
H).
d. 9-Benzylamino-10-cyano-imidazo[ 1,2-a]quinoline-2-carboxylic acid:
The mixture of 2.71 g of ethyl 9-benzylamino-10-cyano-imidazo[1,2-
a]quinoline-2-carboxylate monohydrate, 42 ml of ethanol and 40 ml of 10 % sodium
hydroxide is stirred at 25 °C for 6 hours. To the thick suspension 100 ml of water is
added and the pH of the mixture is adjusted to pH = 3 with 96 % acetic acid. The
pale yellow crystals are filtered off, washed 3 times with 25 ml of water, and dried.
2.3 g title compound is obtained, m.p.: 178-182 °C.
NMR, δH (200 MHz, DMSO-d6): 5,09 ppm (d, 2H, PhCH2), 7,22-7,40 ppm
(m, 5H), 7,59-7,67 .ppm (m, 1H), 7,81-7,89 ppm (m, 1H), 8,37-8,54 ppm (m, 3H),
8,90 ppm (s, 1H, 3-H).
e.1-(9-Benzylamino-10-cyano-imidazo[1,2-a]quinoline-2-carbonyl)-4-
methylpiperazine:

To the solution of 1.71 g of 9-benzylamino-10-cyano-imidazo[1,2-
a]quinoline-2-carboxilic acid and 0.8 ml of triethylamine in 15 ml of chloroform,
the solution of 0.6 g of pyvaloyl chloride in 10 ml of choroform is added dropwise,
under stirring, at 5 °C, in a period of 15 minutes. The reaction mixture is stirred at 5
°C for 1 hour, then the mixture of 0.5 g of N-methylpiperazine, 10 ml of chloroform
and 0.8 ml of triethylamine is added to it. The mixture is stirred at 25 °C for 7
hours, diluted with 100 ml of chloroform, extracted consecutively with 50 ml of
water, 50 ml of 5 % sodium hydrogen carbonate solution and 50 ml of water, dried
on sodium sulfate and concentrated in vacuo. The pale yellow crystalline material is
recrystallized from 6 ml of N,N-dimethylformamide. 0.6 g of the title compound is
obtained, m.p.: 217 °C.
NMR, δH (400 MHz, DMSO-d6): 2.17 ppm (s, 3H), 2.24 ppm (m, 4H), 3.57
ppm (m, 2H), 4.11 ppm (m,2H), 5.08 ppm (d, 2H, PhCH2), 7.23-7.38 ppm (m, 5H),
7.62-7.65 ppm (m, 1H), 7.83-7.87 ppm (m, 1H), 8.36-8.42 ppm (m, 2H), 8.50-8.52
ppm (m, 1H), 8.80 ppm (s, 1H, 3-H).
Example 2
1-(9-Benzylamino- 10-cyano-imidazo[1,2-a]quinoline-2-carbonyl)morpholine:
In the general formula (1) R1 and R2 stand for hydrogen atom, R! for phenyl group,
R4, R5, R6 and R7 for hydrogen atom, R8 for cyano group, X means -NH-group, Z
means oxygen atom, the value of n is 1, the value of in and o is 2, and the value of
r and p is 0.
To the mixture of 1.71 g of 9-benzylamino-10-cyano-imidazo[1,2-
a]quinoline-2-carboxilic acid and 0.8 ml of triethylamine in 15 ml of chloroform,
the solution of 0.6 g of pyvaloyl chloride in 10 ml of choroform is added under
stirring at 5 °C, in a period of 15 minutes. The reaction mixture is stirred at 5 °C for
1 hour, then the mixture of 0.45 g of morpholine, 10 ml of chloroform and 1.6 ml of
triethylamine is added to it. The mixture is stirred at 25 °C for 3 hours, then treated
as described in the previous example. The resulting pale yellow crystals are

recrystallised from 10 ml of N, N-dimethylformamide, to obtain 0.55 g of the title
compound, m.p.: 279 °C.
NMR, δH (400 MHz, DMSO-d6): 3.6 ppm (m, 6H), 4.2 ppm (m, 2H), 5.08
ppm (d, 2H, PhCH2), 7.23-7.38 ppm (m, 5H), 7.62-7.65 ppm (m, 1H), 7.84-7.87
ppm (m, 1H), 8.37-8.39 ppm (m, 2H), 8.50-8.53 ppm (m, 1H), 8.75 ppm (s, 1H, 3-
H).
Example 3
1-(9-Furfurylamino-10-cyano-imidazo[1-2-a]quinoline-2-carbonyl)-4-
methylpiperazine:
In the general formula (I) R1 and R2 stand for hydrogen atom, R3 for 2-furyl group,
R4, R5, R6 and R7 for hydrogen atom, R8 for cyano group, R12 for methyl group, X
means -NH-group, Z means nitrogen atom, the value of n is 1, the value of m and o
is 2, and the value of r and p is 0.
a. 2-Amino-3-cyano-4-furfurylaminoquinoline:
10 g of 2-amino-3-cyano-4-chloroquinoline is heated with 19 g of
furfurylamine at 120 °C for 3 hours. The reaction mixture is cooled to 25 °C and
mixed 6 times with 50 ml of water. The crystals are filtered off and dried. The
resulting product is recrystallized from 60 ml of N,N-dimethylformamide, to obtain
5.8 g of the title compound, m.p.: 206 °C.
NMR, δH (200 MHz, DMSO-d6): 4.98 ppm (d, 2H, Furyl-CH2), 6.29 ppm (s,
2H), 6.35-6.42 ppm (m, 2H), 7.10-7.18 ppm (m, 1H), 7.31-7.35 ppm (m, 1H), 7.47-
7.60 ppm (m, 2H), 8.13-8.20 ppm (m, 2H).
b. Ethyl 9-furfurylamino-10-cyano-imidazo[1,2-alquinoline-2-carboxylate
monohydrate:
To the solution of 2.64 g of 2-amino-3-cyano-4-furfurylaminoquinoline in
100 ml of abs. ethanol, 2.14 g of ethyl bromopyruvate is added at 70 °C under

stirring. The reaction mixture is heated under reflux for 2 hours and the precipitated
crystals are filtered off, to obtain 1.15 g of the title compound. M.p.: 242-245 °C.
NMR, δH (200 MHz, DMSO-d6): 1.33 ppm (t, 3H, COOCH2CH3), 4.31 ppm
(q, 2H, COOCH2CH3), 5.05 ppm (d, 2H, Furyl-CH2), 6.40-6.43 ppm (m, 2H), 7.58-
7.66 ppm (m, 2H), 7.80-7.88 ppm (m, 1H), 8.31 ppm (t, 1H), 8.41-8.45 ppm (m,
2H), 9.04 ppm (s, 1H, 3-H).
c. 9-Furfurylamino-10-cyano-imidazo[1,2-a]quinoline-2-carboxylic acid:
The mixture of 2.52 g of ethyl 9-furfurylamino-10-cyano-imidazo[1,2-
a]quinoline-2-carboxylate monohydrate, 40 ml of ethanol and 33 ml of 10 % sodium
hydroxide is stirred at 25 °C for 3 hours. To the thick suspension 80 ml of water is
added and with 96 % acetic acid the mixture acidified to pH = 3. The pale yellow
crystals are filtered off, washed 3 times with 25 ml of water and dried. 2.32 g of the
title compound is obtained, m.p.: 180-185 °C.
NMR, δH (200 MHz, DMSO-d6): 5.05 ppm (d, 2H, Furyl-CH2), 6.39-6.42
ppm (m, 2H), 7.56-7.64 ppm (m, 2H), 7.79-7.87 ppm (m, 1H), 8.27 ppm (t, 1H),
8.36-8.46 ppm (m, 2H), 8.93 ppm (s, 1H, 3-H).
d.1-(9-Furfurylamino-10-cyano-imidazo[1,2-a]quinoline-2-carbonyl)-4-
methylpiperazine:
To the mixture of 1.79 g of 9-furfurylamino-10-cyanoimidazo[1,2-
a]quinoline-2-carboxylic acid and 0.8 ml of triethylamine in 15 ml of chloroform,
the solution of 0.6 g of pyvaloyl chloride in 10 ml of chloroform is added dropwise,
under stirring at 5 °C, in a period of 15 minutes. The reaction mixture is stirred at
5°C for 1 hour, then the mixture of 0.46 g of N-methylpiperazine, 10 ml of
chloroform and 0.8 ml of triethylamine is added to it. The mixture is stirred at 25°C
for 3 hours, diluted with 100 ml of chloroform, extracted consecutively with 50 ml
of water, 50 ml of 5 % sodium hydrogen carbonate solution and 50 ml of water,
dried over sodium sulfate and concentrated in vacuum. The pale yellow crystalline

material is recrystallized from 50 ml of ethanol. 0.18 g of the title compound is
obtained, m.p.: 237 °C.
NMR, δH (200 MHz, DMSO-d6): 2.17 ppm (s, 3H), 2.24 pprn (m, 4H), 3.57
ppm (m, 2H), 4.11 ppm (m, 2H), 5.05 ppm (d, 2H, Furyl-CH2), 6.40-6.44 ppm (m,
2H), 7:57-7.65 ppm (m, 2H), 7.80-7.88 ppm (m, IH), 8.23 ppm (t, 1H), 8.39-8.46
ppm (m, 2H), 8.81 ppm (s, 1H, 3-H).
Example 4
1-(9-Furfurylamino-10-cyano-imidazo[1,2-a]quinoline-2-carbonyl)piperazine:
In the general formula (I) R1 and R2 stand for hydrogen atom, R3 for
2-furyl group, R4, R5, R6 and R7 for hydrogen atom, R8 for cyano group, X means -
NH- group, Z means -NH- group, the value of n is 1, the value of m and o is 2, and
the value of r and p is 0.
To the mixture of 1.79 g of 9-furfurylamino-10-cyano-imidazo[1,2-
a]quinoline-2-carboxylic acid -obtained as described in Example 3.- and 0.8 ml of
triethylamine in 15 ml of chloroform, the solution of 0.6 g of pyvaloyl chloride in 10
ml of chloroform is added dropwise, under stirring at 5 °C, in a period of 15
minutes. The reaction mixture is stirred at 5°C for 1 hour, then the mixture of 0.46 g
of piperazine, 10 ml of chloroform and 0.8 ml of triethylamine is added to it. The
mixture is stirred at 25°C for 3 hours, diluted with 100 ml of chloroform, extracted
consecutively with 50 ml of water, 50 ml of 5 % sodium hydrogen carbonate
solution and 50 ml of water, dried over sodium sulfate and concentrated in vacuum.
The pale yellow crystalline material is recrystallized from 50 ml of ethanol. 0.14 g
of the title compound is obtained, m.p.: 239 °C
NMR, δH (200 MHz, DMSO-d6): 2.7 ppm (m, 4H), 3.5 ppm (m, 2H), 4.05
ppm (m, 2H), 5.05 ppm (d, 2H, Furyl-CH2), 6.40-6.44 ppm (m, 2H), 7.57-7.65 ppm
(m, 2H), 7.80-7.88 ppm (m, IH), 8.23 ppm (t, IH), 8.39-8.46 ppm (m, 2H), 8.81
ppm (s, 1H, 3-H).

Example 5
1-(9-Furfurylamino-10-cyano-imidazo[1,2-a]quinoline-2-carbonyl)morpholine:
In the general formula (I) R1 and R2 stand for hydrogen atom, R3 for
2-furyl group, R4, R5, R6 and R7 for hydrogen atom, R8 for cyano group, X means -
NH- group, Z means oxygen atom, the value of n is 1, the value of m and o is 2, and
the value of r and p is 0.
To the mixture of 1.79 g of 9-mrfurylamino-10-cyano-imidazo[1,2-
a]quinoline-2-carboxylic acid -obtained as described in Example 3.- and 0.8 ml of
triethylamine in 15 ml of chloroform, the solution of 0.6 g of pyvaloyl chloride in 10
ml of chloroform is added dropwise, under stirring at 5 °C, in a period of 15
minutes. The reaction mixture is stirred at 5°C for 1 hour, then the mixture of 0.66 g
of morpholine, 10 ml of chloroform and 0.8 ml of triethylamine is added to it. The
mixture is stirred at 25°C for 3 hours, diluted with 100 ml of chloroform, extracted
consecutively with. 50 ml of water, 50 ml of 5 % sodium hydrogen carbonate
solution and 50 ml of water, dried over sodium sulfate and concentrated in vacuum.
The pale yellow crystalline material is recrystallized from 50 ml of ethanol. 0.18 g
of the title compound is obtained, m.p.: 267 °C
NMR, δH (200 MHz, DMSO-d6): 3.6 ppm (m, 6H), 4.2 ppm (m, 2H), 5.05
ppm (d, 2H, Furyl-CH2), 6.40-6.44 ppm (m, 2H), 7.57-7.65 ppm (m, 2H), 7.80-7.88
ppm (m, 1H), 8.23 ppm (t, 1H), 8.39-8.46 ppm (m, 2H), 8.81 ppm (s, 1H, 3-H).
Example 6
1-(9-Thenylamino-10-cyano-imidazon[1,2-a]quinoline-2-carbonyl)morpholine:
In the general formula (I) R1 and R2 stand for hydrogen atom, RJ for
2-tenyl group, R4, R5, R6 and R7 for hydrogen atom, R8 for cyano group, X means -
NH- group, Z means oxygen atom, the value of n is 1, the value of m and o is 2, and
the value of r and p is 0.
a. 2-Amino-3-cyano-4-thenylaminoquinoline:

10 g of 2-amino-3-cyano-4-chloroquinoline is heated with 19 g of
thienylmethylamine at 115 °C for 4 hours. The reaction mixture is cooled to 25 °C
and mixed 6 times with 50 ml of water. The crystals are filtered off, washed 2 times
with 50 ml of water and dried. The resulting product is recrystallized from 60 ml of
N,N-dimethylformamide, to obtain 6.8 g pale yellow title compound,
m.p.: 208-209 °C.
NMR, 5H (200 MHz, DMSO-d6): 5.18 ppm (d, 2H, Thienyl-CH2), 6.28 ppm
(s, 2H), 6.96-7.00 ppm (m, 1H), 7.07-.19 ppm (m, 2H), 7.31-7.42 ppm (m, 2H),
7.48-7.56 ppm (m, 1H), 8.09-8.13 ppm (m, 1H), 8.30 ppm (t, 1H).
b. Ethyl 9-thenylamino-10-cvano-imidazo[1,2-a]quinoline-2-carboxylate:
To the solution of 5.61 g of 2-amino-3-cyano-4-thenylaminoquinoline in
200 ml of abs. ethanol, 4.29 g of ethyl bromopyruvate is added at 70 °C under
stirring. The reaction mixture is heated under reflux for 2 hours and the precipitated
crystals are filtered off to obtain 2.54 g of the title compound. M.p.: 255-256 °C.
NMR, δH (200 MHz, DMSO-d6): 1.33 ppm (t, 3H, COOCH2CH3), 4.31 ppm
(q, 2H, COOCH2CH3), 5.24 ppm (d, 2H, Thienyl-CH2), 6.96-7.00 ppm (m, 1H),
7.14 ppm (m, 1H), 7.40-7.43 ppm (m, 1H), 7.61-7.68 ppm (m, 1H), 7.82-7.90 ppm
(m, 1H), 8.42-8.46 ppm (m, 3H), 9.05 ppm(s, 1H, 3-H).
c. 9-Thenylamino- 10-cyano-imidazo[1,2-a]quinoline-2-carboxylic acid:
The mixture of 2.54 g of ethyl 9-thenylamino-10-cyano-imidazo[1,2-
a]quinoline-2-carboxylate, 40 ml of ethanol and 33 ml of 10 % sodium hydroxide is
stirred at 25 °C for 6 hours. To the thick suspension 80 ml of water is added and
with 96 % acetic acid the mixture acidified to pH = 3. The pale yellow crystals are
filtered off, washed 5 times with 10 ml of water and dried. 2.18 g of the title
compound is obtained, m.p.: 209-217 °C under decomposition.
NMR, δH (400 MHz, DMSO-d6): 5.24 ppm (d, 2H, Thienyl-CH2), 8,88 ppm
(s, 1H, 3-H).

d. 1-(9-Thenvlamino-10-cyano-imidazo[1,2-a]quinoline-2-carbonynmorpholine:
To the mixture of 1.80 g of 9-thenylamino-10-cyano-imidazo[1,2-
a]quinoline-2-carboxylic acid and 1.1 ml of triethylamine in 10 ml of chloroform,
the solution of 0.87 g of pyvaloyl chloride in 10 ml of chloroform is added
dropwise, under stirring at 5 °C, in a period of 15 minutes. The reaction mixture is
stirred at 5°C for 1 hour, then the mixture of 0.61 g of morpholine, 10 ml of
chloroform and 1.1 ml of triethylamine is added to it. The mixture is stirred at 25°C
for 3 hours, diluted with 100 ml of chloroform, extracted consecutively with 50 ml
of water, 50 ml of 5 % sodium hydrogen carbonate solution and 50 ml of water,
dried over sodium sulfate and concentrated in vacuum. The yellow crystalline
material is recrystallized from 200 ml of ethanol. 0.19 g of the title compound is
obtained, m.p.: 315°C
NMR, δH (400 MHz, DMSO-d6): 3.6 ppm (m, 6H), 4.2 ppm (m, 2H), 5.24
ppm (d, 2H, Thienyl-CH2), 6.97-7.00 ppm (m, 1H), 7.14 ppm (m, 1H), 7.41 ppm (m,
1H), 7.61-7.65 ppm (m, 1H), 7.83-7.87 ppm (m, 1H), 8.37-8.45 ppm (m, 3H), 8.82
ppm (s, 1H, 3-H).
Example 7
1-(9-Thenylamino-10-cyano-imidazo[1,2-a]quinoline-2-carbonyl)piperazine
In the general formula (I) Rl and R2 stand for hydrogen atom, R3 for
2-thienyl group, R4, R5, R6 and R7 for hydrogen atom, R8 for cyano group, X means
-NH- group, Z means -NH- group, the value of n is 1, the value of m and o is 2,
and the value of r and p is 0.
To the mixture of 1.80 g of 9-thenylamino-10-cyano-imidazo[1,2-
a]quinoline-2-carboxylic acid -obtained as described in Example 6.- and 1.1 ml of
triethylamine in 10 ml of chloroform, the solution of 0.87 g of pyvaloyl chloride in
10 ml of chloroform is added dropwise, under stirring at 5 °C, in a period of 15
minutes. The reaction mixture is stirred at 5°C for 1 hour, then the mixture of 0.61 g
of piperazine, 10 ml of chloroform and 1.1 ml of triethylamine is added to it. The

mixture is stirred at 25°C for 3 hours, diluted with 100 ml of chloroform, extracted
consecutively with 50 ml of water, 50 ml of 5 % sodium hydrogen carbonate
solution and 50 ml of water, dried over sodium sulfate and concentrated in vacuum.
The pale yellow crystalline material is recrystallized from 50 ml of ethanol. 0.19 g
of the title compound is obtained, m.p.: 269 °C
NMR, δH (400 MHz, DMSO-d6): 2.7 ppm (m, 4H), 3.5 ppm (m, 2H), 4.05
ppm (m, 2H), 5.24 ppm (d, 2H, Thienyl-CH2), 6.97-7.00 ppm (m, 1H), 7.14 ppm (m,
1H), 7.41 ppm (m, 1H), 7.61-7.65 ppm (m, 1H), 7.83-7.87 ppm (m, 1H), 8.37-8.45
ppm (m, 3H), 8.82 ppm (s, 1H, 3-H).

Structure and physical parameters of the compounds of the formula (III)
prepared according to Example 1. is demonstrated in Table I.



Structure and physical parameters of the compounds of the formula (IV)
prepared according to Example 1. is demonstrated in Table II.







Structure and physical parameters of the compounds of the formula (V)
prepared according to Example 1. is demonstrated in Table III.

Example 51
The tablet of the following composition is prepared by known methods:

Active ingredient: 25 mg
Lactose 50 mg
Avicel 21 mg
Crospovidone 3 mg
Magnesium stearate 1 mg
Biology
Methods
Human adenosine A3 receptor binding
Preparing membrane suspension: ovarium cells of cloned golden hamster expressing
human A3 receptor (further: CHO-hA3) are appropriately cultured and propagated.
Achieving confluent cell layer, the culturating liquide is removed from the cells by
washing them with 37 °C PBS, then the cell are suspended in. ice cold PBS,
centrifuged (1000 x g 10 perc) (Sigma 3K30) and homogenated using teflon
homogenizer (B.Braun Potter S) at 1500/min rotation speed, for 15 sec. in the
following buffer: 50 mM Tris, 10 mM MgCl2, 1 mM EDTA, pH 8.0. The
homogenatum is centrifuged (43.000 g, 10 min). The precipitate is suspended in the
above buffer, protein concentration 0.1 mg/ml (Bradford method). Aliquots of the
membrane preparatum are stored at -80 °C.
Binding protocol: incubate CHO-hA3 membrane preparation (2 ug protein
content) in incubation buffer (50 mM Tris, 10 mM MgCl2, 1 mM EDTA, 3 U/mL
adenosine deaminase, pH 8.0), in the presence of 0.5 11M [l25I]AB-MECA (p-amino-
-3-iodo-benzyI-5'-N-methylcarboxamido-adenosine) (100.000 cpm) and 100 µM R-
PIA (N6-[L-2-phenylisopropyl]adenosine) to define non-specific binding of test
compound in a total volume of 50 uL for 1 hr at room temperature. Filter over
Whatman GF/B glass fibre filters (presoaked in 0.5% polyethylenimine for 3 hours),
wash 4x with 1 mL ice-cold 50 mM Tris, 10 mM MgCl2, 1 mM EDTA (pH 8.0) on
96-well Brandel Cell Harvester. Detection of activity: in gamma-counter (1470
Wizard, Wallac). Inhibition [%] — 100-((activity in the presence of test compound -
non-specific activity)/(total activity - non-specific activity))* 100

Human adenosine A1 receptor binding
Preparing membrane suspension: ovarium cells of cloned golden hamster expressing
human A1 receptor (further: CHO-hAi) are appropriately cultured and propagated.
Achieving confluent cell layer the culturating liquide is removed from the cells by
washing them with 37 °C PBS, then the cell are suspended in ice cold PBS, washed
3 times with ice cold PBS, centrifuged (1000 x g 10 perc) (Sigma 3K30) and
homogenated using teflon homogenizer (B.Braun Potter S) at 1500/min rotation
speed, for 15 sec. in the following buffer: 50 tnM Iris, 10 mM HCl, pH 7.4. The
homogenatum is centrifuged (43.000 g, 10 min). The precipitate is suspended in the
above buffer, protein concentration 5 mg/mL (Bradford method). Aliquots of the
membrane preparatum are stored at -80 °C.
Binding protocol: incubate CHO-hAi membrane preparation (50 µg protein content)
in incubation buffer (50 mM Tris, 3 U/mL adenosine deaminase, pH 7.4), 10 nM
[3H]CCPA (2-chloro-N6-cyclopenthyl-adenosine) (80.000 dpm) and 10 uM R-PIA
(N6-[L-2-phenylisopropyl]adenosine) to define the non-specific binding or test
compound in a total volume of 100 µL for 3 hr at room temperature. Filter over
Whatman GF/B glass fibre filters (presoaked in 0.5% polyethylenimine for 3 hours),
wash 4x with 1 mL ice-cold 50 mM Tris (pH 7.4) on 96-well Brandel Cell
Harvester. Detection of activity: in the presence of 200 µL of HiSafe-3 coctail in
beta-counter (1450 Microbeta, Wallac). Inhibition [%] = 100-((activity in the
presence of test compound - non-specific activity)/(total activity - non-specific
activity))* 100
Human adenosine A2a receptor binding
Binding protocoll: Incubate 7 µg of membranes (human A2a adenosine receptors
transfected into HEK-293 cells, source: Receptor Biology, Inc.), buffer (50 mM
Tris-HCl, 10 mM MgCl2, 1 mM EDTA, 2 U/mL adenosine deaminase, pH 7.4), 20
nM [3H]CGS-21680 (2-[p-(2-carbonylethyl)phenylethylamino]-5'-N-
ethylcarboxamido-adenosine) (200.000 dpm) and 50 uM NECA (5'-N-
ethylcarboxamido-adenosine) to define the non-specific binding of test compound,
in a total volume of 100 µl for 90 min at room temperature. Filter in vacuum over

Whatman GF/B glass fibre filters (presoaked for 3 hours in 0.5% polyethylenimine),
wash 4x with 1 mL ice-cold 50 mM Tris, 10 mM MgCl2, 1 mM EDTA, 0.9 % NaCl,
pH 7.4) on 96-well Brandel Cell Harvester. Detection of activity: in beta-counter
(1450 Microbeta, Wallac) in the presence of 200 µL of HiSafe-3 coctail. Inhibition
[%] = 100-((activity in the presence of test compound - non-specific activity)/(total
activity - non-specific activity))* 100.
Human adenosine A2b receptor binding
Binding protocol: incubate 20.8 ug of membranes (human A2b adenosine receptors
transfected into HEK-293 cells, source: Receptor Biology, Inc.), buffer (50 mM
Tris-HCl, 10 mM MgCl2, 1 mM EDTA, 0.1 mM benzamidine, 2 U/mL adenosine
deaminase, pH 6.5), 32.4 nM [3H]DPCPX (8-cyclopenthyl-1,3-dipropylxanthine)
(800.000 dpm) and 100 µM NEC A (5'-N-ethylcarboxamido-adenosine) to define
non-specific binding or test compound in a total volume of 100 µL for 30 min at
room temperature. Filter under 25 Hgmm vacuum over Whatman GF/C glass fibre
filters (presoaked in 0.5% polyethylenimine for 3 hours), wash 4x with 1 mL ice-
cold 50 mM Tris-HCl (pH 6.5) on 96-well Brandel Cell Harvester. Detection of
activity: in the presence of 200 uL of HiSafe-3 coctail in beta-counter (1450
Microbeta, Wallac). Inhibition [%] = 100-((activi.ty in the presence of test
compound - non-specific activity)/(total activity - non-specific activity))* 100
Results
We consider the compounds as biologically actives ones if they inhibit the
binding of the radioligand on human adenosine A3 receptors with an activity above
80 % at 1 uM in our experimental conditions.
The dissociation constant (Kd) of [I23I]AB-MECA on CPIO-hA3 membrane
preparation is determined by isotope saturation studies with the help of Scatchard
analysis (G. Scatchard, Ann. N. Y. Acad. Sci. 51:660, 1949). The IC50 is converted
to an affinity constant (Ki) by application of the Cheng-Prusoff equation (Y. J.
Cheng and W. H. Prusoff, Biochem. Pharmacol. 22:3099, 1973).

Several compounds of the general formula (I), (II), (III), (IV) and (V) display
remarkable biological effects. Most important activities are exhibited by the
compounds of the general formula (I) defined in claims 1-3. Especially
advantageous are the compounds given in the Examples, their Kj values are in the
range of 0.8 nM and 700 nM. Ki values of the most advantageous compounds are
0.8 and 15nM.
The compounds possess proper bioavailability and a selectivity of at least 3
order of magnitude, in respect of the human adenosine A1, A2a and A2b receptor
subtypes.
Further, the duration of their action at intravenous and oral administration is
long, their ED50 values are low, their toxicological and side-effect profiles are
advantageous.
These above data favour the therapeutic application of the compounds of the
general formula (I).

WE CLAIM :
Compounds of the general formula (I)

wherein
R1 stands for hydrogen atom or a straight or branched C1-4 alkyl group;
R2 stands for hydrogen atom or a straight or branched C1-4 alkyl group;
R3 stands for hydrogen atom, or a straight: or branched C1-4 alkyl group,
C3-6 cycloalkyl group, a phenyl-, thienyl-, or furyl group, optionally
substituted with one or more straight or branched C1-4 alkyl group,
straight or branched C1-4 alkoxy group, or halogen atom; a six- or five-
membered heteroaromatic ring containing one, two or three nitrogen
atoms, or a five-membered heteroaromatic ring containing one
nitrogen atom and one oxygen atom, or one nitrogen atom and one
sulphur atom, optionally substituted with one or more straight or
branched C1-4 alkyl group, straight or branched C1-4 alkoxy group, or
halogen atom;
R4, R5, R6 and R7 independently stand for hydrogen atom, straight or
branched C1-4 alkyl group, straight or branched C1-4 alkoxy group,

hydroxy group or halogen atom, or R4 and R7 stand for hydrogen
atom and R3 and R6 form together a methylenedioxy group;
R stands for hydrogen atom or for cyano group, ammocarbonyl group,
C1-4 alkoxycarbonyl group, carboxy group;
R and R10 independently stand for hydrogen atom, straight or branched
C1-4 alkyl group, C3-6 cycloalkyl group.
X stands for —CH2- group, -NH- group, -MR11- group, or sulphur atom,
oxygen atom, sulpho group or sulphoxy group -wherein R11 means
straight or branched C1-4 alkyl group or C3-6 cycloalkyl group;
Z means oxygen atom, sulphur atom, -NH- group or -NR12- group, -
wherein R12 stands for straight or branched C1-4 alkyl group or C3-6
cycloalkyl group-;
n has the value of zero, 1 or 2;
m has the value of zero, 1, 2 or 3
o has the value of zero, 1, 2 or 3
p has the value of zero or 1
r has the value of zero or 1. with the proviso that at least one of m and
o is different from zero ,
and their salts, solvates, and isomers, as well as the salts and. solvates thereof.
2. Compounds of the general formula (I)


as defined in Claim 1, wherein
Rl stands for hydrogen atom or a straight or branched C1-4 alkyl group;
R2 stands for hydrogen atom or a straight or branched C1-4 alkyl group;
R3 stands for hydrogen atom, or a straight or branched C1-4 alkyl group,
C3-6 cycloalkyl group, a phenyl-. thienyl-, or furyl group, optionally
substituted with one or more straight or branched C1-4 alkyl group,
straight or branched C1-4 alkoxy group, or halogen atom;
R4, R5, R6 and R7 independently stand for hydrogen atom, straight or
branched C1-4 alkyl group, straight or branched C1-4 alkoxy group,
hydroxy group or halogen atom, or R4 and R7 stand for hydrogen atom
and R5 and R6 form together a methylenedioxy group;
R8 stands for hydrogen atom or for cyano group, aminocarbonyl group,
C1-4 alkoxycarbonyl group, carboxy group;
R9 and R10 independently stand for hydrogen atom, straight or branched
C1-4 alkyl group, C3-6 cycloalkyl group,
X stands for -CH2- group, -NH- group, -NR11- group, or sulphur atom.
oxygen atom, sulpho group or sulphoxy group -wherein R11 means
straight or branched C1-4 alkyl group or C3-6 cycloalkyl group-;

Z means oxygen atom, sulphur atom, -NH- group or -NR12- group, -
wherein R12 stands for straight or branched C1-4 alkyl group or C3-6
cycloalkyl group-;
n has the value of zero, 1 or 2;
m has the value of zero, 1, 2 or 3
o has the value of zero, 1, 2 or 3
p has the value of zero or 1
r has the value of zero or 1. with the proviso that at least one of m and
o is different from zero ,
and their salts, solvates, and isomers, as well as the salts and solvates thereof.
3. Compounds of the general formula (I)

as defined in Claims 1.-2., wherein
R1 stands for hydrogen atom or methyl group;
R2 stands for hydrogen atom or methyl group;
R3 stands for phenyl- or thienyl- or furyl group;

R4, R5, R6 and R7 independently stand for hydrogen atom, straight or
branched C1-4 alkyl group, straight or branched C1-4 alkoxy group,
hydroxy group or halogen atom, or
R4 and R7 stand for hydrogen atom and R5 and R6 form together a
methylenedioxy group;
R8 stands for hydrogen atom or cyano group;
R9 and R10 stand for hydrogen atom, methyl-, ethyl- or cyclopropyl group,
X means -NH- group or oxygen atom;
Z means oxygen atom, sulphur atom, -NH- group or -NR12- group,
- wherein R12 stands for straight or branched C1-4 alkyl group or C3-6
cycloalkyl group-; and
n has the value of 1;
m has the value of 2,
o has the value 2,
p has the value of zero,
r has the value of zero
and their salts, solvates, and isomers, as well as the salts and solvates thereof.
4. Compounds as claimed in claims 1-3, as follows :
1-(9-Benzylamino-10-cyano-imidazo[1,2-a]quinoline-2-carbonyl)-4-
methylpiperazine
1-(9-Benzylamino-10-cyano-imidazo[1,2-a]quinoline-2-carbonyl)morpholine
1-(9-Furfurylamino-10-cyano-imidazo[1,2-a]quinoline-2-carbonyl)-4-
methylpiperazine
1-(9-Furfurylamino-10-cyano-imidazo[1,2-a]quinoline-2-
carbonyl)piperazine:
1-(9-Furfurylamino-10-cyano-imidazo[1,2-a]quinoline-2-
carbonyl)morpholine
1-(9-Tenylamino-10-cyano-imidazo[1,2-a]quinolin-2-carbonyl)morpholine
1-(9-Tenylamino-10-cyano-imidazo[1,2-a]quinoline-2-carboniy)piperazine

and their salts, solvates and isomers, as well as the salts and solvates thereof.
5. Process for the preparation of the compounds of the general formula (I)

and their salts, solvates and isomers, wherein in the formula Rl, R2, R3, R4,
R5, R6, R7, R8, R9:, R10, X, Z, n, m, o, p and r have the meaning as defined in
claim 1, wherein a compound of the general formula (VIII)

- wherein R9, R10. Z, n, m, o, p and r have the meaning as defined in Claim
1- is acylated with an acid or reactive acid derivative of the general formula
(II)


- wherein R1, R2, R3, R4, R5, R6, R7, R8, X and n have the meaning as
defined in Claim Land, if desired, the substituenls of the resulting compound
of the general formula (1) are transformed into each other by known methods,
and/or the compound of the general formula (I) is transformed into its salt or
solvate, or liberated from its salt or solvate. and/or it is resolved into its
optically active isomers, or the optically active isomer is transformed into the
racemic compound.
6. Process, as defined in claim 5, wherein the acylation is
canned out in the presence of a base, in an organic solvent.
7. Process, as defined in claims 5-6, wherein the reactive
derivative of the acid of the general formula (I) is the appropriate acid
halogenide or mixed anhydride.
8. Process, as defined in claims 5-7, wherein the organic
solvent is a halogenated hydrocarbon, preferably chloroform.
9. Process, as defined in claims 5-8, wherein the base is an
organic base, preferably triethylamine.

10. Pharmaceutical composition, characterized in that it contains one or more
compounds of the general formula (I)

- wherein in the formula R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, X, Z, n, m, o,
p and r have the meaning as defined in Claim 1.,- and/or their salts, solvates,
isomers, the salts, solvates thereof, and one or more auxiliary materials,
commonly used in the pharmaceutical industry.
11. Pharmaceutical composition as defined in claim 10, wherein
it contains as active substance one or more of the compounds defined in
claim 3.
12. A pharmaceutical composition as claimed in claim 10, for the
treatment of pathologies where A3 receptor plays a role in the
development of the disease.

13. A pharmaceutical composition as claimed in claim 10, comprising
compounds of the general formula (I)

- where in the formula R1, R2, R3, R4, R5, R6, R7, R8, R9: R10, X, Z, n, m, o, p,
and r have the meaning as defined in claim 1.- as A3 receptor ligands, in the
case of
disfunctions of the heart, kidney, respiratory system and central nervous
system, for inhibition of the protective effect of the adenosine on the growing
tumoric cells, for prevention of the degranulation of the mast cells, for
inhibition of the formation of the cytokines, for decreasing the inner pressure
of the eye, for inhibition of the TNFα liberation, for hindering the migration
of the eozinofil and neutrofil granulocytes and other intlanimation cells, for
inhibition of the constriction of the trachea, and for hindering infiltration of
the blood plasma through the blood-vessel.
14. A pharmaceutical composition as claimed in claim 10, comprising
compounds of the general formula (I)


- where in the formula R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, X, Z, n, m, o, p,
and r have the meaning as defined in claim 1.- as A3 receptor antagonists, as
active ingredients of antiinflammatory, antiasthmatic, antiischemic,
antidepressant, antiarrhythmic, kidney function protective, tumor preventing,
antiparkinson or cognitive function stimulating pharmaceutical compositions
and as active components of compositions which can be used in the treatment
or prevention of the following diseases: injury of the heart muscle during
reperfusion, chronic obstructive pulmonary disease (COPD), adult respiratory
insufficiency (ARDS) - including chronic bronchitis, pulmonary emphysema
or difficult breathing-, allergic reactions (e.g. rhinitis, poison ivy-induced
responses, nettle-rush, scleroderma, arthritis), other autoimmune diseases,
inflammatory bowel diseases, Addison disease, Crohn disease, psoriasis,
diseases of the joints, hypertonia, abnormal neurological functions, glaucoma
and diabetes.
15. A pharmaceutical composition as claimed in claim 10, comprising
compounds of the general formula (I)


- where in the formula R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, X, Z, n, m, o, p,
and r have the meaning as defined in claim 1.- as active components for the
treatment of pathologies like asthma, COPD and ARDS, glaucoma, tumor,
allergic and inflammatory diseases, ischemia, hypoxia, arrhythmia of the
heart and diseases of the kidney.

Compounds of
general formula (I), wherein X, Z,
R1-R10, m, n, o, p, r as described in
the description are strong adenosine
A3 receptor ligands preferably
antagonists.

Documents:

851-KOLNP-2005-CORRESPONDENCE 1.1.pdf

851-KOLNP-2005-CORRESPONDENCE.pdf

851-KOLNP-2005-FORM 27 1.1.pdf

851-KOLNP-2005-FORM 27.pdf

851-kolnp-2005-granted-abstract.pdf

851-kolnp-2005-granted-assignment.pdf

851-kolnp-2005-granted-claims.pdf

851-kolnp-2005-granted-correspondence.pdf

851-kolnp-2005-granted-description (complete).pdf

851-kolnp-2005-granted-examination report.pdf

851-kolnp-2005-granted-form 1.pdf

851-kolnp-2005-granted-form 18.pdf

851-kolnp-2005-granted-form 3.pdf

851-kolnp-2005-granted-form 5.pdf

851-kolnp-2005-granted-gpa.pdf

851-kolnp-2005-granted-reply to examination report.pdf

851-kolnp-2005-granted-specification.pdf


Patent Number 226498
Indian Patent Application Number 851/KOLNP/2005
PG Journal Number 51/2008
Publication Date 19-Dec-2008
Grant Date 17-Dec-2008
Date of Filing 10-May-2005
Name of Patentee SANOFI-AVENTIS
Applicant Address 174, AVENUE DE FRANCE, F-75013 PARIS,
Inventors:
# Inventor's Name Inventor's Address
1 ARANYI PETER BIMBO UT 216, H-1026 BUDAPEST
2 BALAZS LASZLO TOTH ARPAD U. 23/A, H-2131 GOD
3 BALOGH MARIA BARATSAG U.21, H-2120, DUNAKESZI
4 BATORI SANDOR RAKOCZI F. U.268/A, H-1214 BUDAPEST
5 T. NAGY LAJOS ISTVAN U.47, H-1078 BUDAPEST,
6 TIMARI GEZA ZOLDFA U. 8, H-2220 VECSES
7 BOER KINGA VIZIMOLNAR U.2, H-1031 BUDAPEST
8 KAPUI ZOLTAN ETELE 56/A, H-1115 BUDAPEST
9 MIKUS ENDRE IDA U.96, H-1162 BUDAPEST
10 GERBER KATALIN SZEREMI SOR 6, H-1117 BUDAPEST
11 VARGANE SZEREDI JUDIT TELKES U.12, H-1046 BUDAPEST
12 URBAN-SZABO KATALIN SZENT LASZLO U.158, H-1131 BUDAPEST
13 WALCZ ERZSEBET KIRALY U.28/21, H-1061 BUDAPEST
PCT International Classification Number C07D 471/04
PCT International Application Number PCTHU2003/000095
PCT International Filing date 2003-11-11
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 PO203976 2002-11-15 Hungary