Carbamate derivatives of alkyl-heterocycles, preparation thereof and therapeutic use thereof

1. A compound corresponding to the general formula (I)

in which

R 2 represents a hydrogen or fluorine atom or a hydroxyl, cyano, trifluoromethyl, C 1-6 -alkyl, C 1-6 -alkoxy or NR 8 R 9 group;

n represents an integer equal to 1, 2 or 3 and m represents an integer equal to 1 or 2;

A represents a covalent bond or a group C 1-8 -alkylene;

R 1 represents a group R 5 optionally substituted with one or more groups R 6 and/or R 7 ;

R 5 represents a group chosen from phenyl, pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, triazinyl, naphthyl, quinolinyl, isoquinolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, cinnolinyl and naphthyridinyl;

R 6 represents a halogen atom or a cyano, —CH 2 CN, nitro, hydroxyl, C 1-6 -alkyl, C 1-6 -alkoxy, C 1-6 -thioalkyl, C 1-6 -haloalkyl, C 1-6 -haloalkoxy, C 1-6 -halothioalkyl, C 3-7 -cycloalkyl, C 3-7 -cycloalkyl-C 1-3 -alkylene, C 3-7 -cycloalkyl-C 1-3 -alkylene-O—, NR 8 R 9 , NR 8 COR 9 , NR 8 CO 2 R 9 , NR 8 SO 2 R 9 , NR 8 SO 2 NR 8 R 9 , COR 8 , CO 2 R 8 , CONR 8 R 9 , SO 2 R 8 , SO 2 NR 8 R 9 or —O—(C 1-3 -alkylene)-O— group;

R 7 represents a group chosen from furyl, pyrrolyl, thienyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl, imidazolyl, pyrazolyl, oxadiazolyl, thiadiazolyl, phenyl, pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, triazinyl, naphthyl, quinolinyl, isoquinolinyl, phthalazinyl, quinazolinyl, quinoxalinyl, cinnolinyl, naphthyridinyl, imidazopyrimidinyl, thienopyrimidinyl, benzofuryl, benzothienyl, benzimidazolyl, benzoxazolyl, benzisoxazolyl, benzothiazolyl, benzisothiazolyl, indolyl, isoindolyl, indazolyl, pyrrolopyridyl, furopyridyl, thienopyridyl, imidazopyridyl, pyrazolopyridyl, oxazolopyridyl, isoxazolopyridyl, thiazolopyridyl, phenyloxy, benzyloxy and pyrimidinoxy; or the group(s) R 7 possibly being substituted with one or more groups R 6 that may be identical to or different from each other;

R 3 represents a hydrogen or fluorine atom, a group C 1-6 -alkyl or a trifluoromethyl group;

R 4 represents a group chosen from furyl, pyrrolyl, thienyl, isothiazolyl, oxazolyl, isoxazolyl, pyrazolyl, oxadiazolyl, thiadiazolyl, imidazolyl, triazolyl and tetrazolyl;

this group being optionally substituted with one or more substituents chosen from a halogen atom, a group C 1-6 -alkyl, C 1-6 -haloalkyl, C 3-7 -cycloalkyl, C 3-7 -cycloalkyl-C 1-3 -alkylene, C 1-6 -haloalkoxy, cyano, NR 8 R 9 , NR 8 COR 9 , NR 8 CO 2 R 9 , NR 8 SO 2 R 9 , NR 8 SO 2 NR 8 R 9 , COR 8 , CO 2 R 8 , CONR 8 R 9 , CON(R 8 )(C 1-3 -alkylene-NR 10 R 11 ), SO 2 R 8 , SO 2 NR 8 R 9 , —O—(C 1-3 -alkylene)—O—, phenyl, phenyloxy, benzyloxy, pyridyl, pyrazinyl, pyridazinyl, triazinyl or pyrimidinyl; the phenyl, phenyloxy, pyridyl, pyrazinyl, pyridazinyl, triazinyl and pyrimidinyl groups possibly being substituted with one or more substituents chosen from a halogen atom and a cyano, nitro, C 1-6 -alkyl, C 1-6 -alkoxy, C 1-6 -thioalkyl, C 1-6 -haloalkyl, C 1-6 -haloalkoxy, C 1-6 -halothioalkyl, C 3-7 -cycloalkyl or C 3-7 -cycloalkyl-C 1-3 -alkylene group;

R 8 , R 9 , R 10 and R 11 represent, independently of each other, a hydrogen atom or a group C 1-6 -alkyl, or form, with the atom(s) that bear(s) them,

in the case of NR 8 R 9 , a ring chosen from azetidine, pyrrolidine, piperidine, morpholine, thiomorpholine, azepine, oxazepine and piperazine rings, this ring being optionally substituted with a group C 1-6 -alkyl or benzyl;

in the case of NR 8 COR 9 , a lactam ring; in the case of NR 8 CO 2 R 9 , a oxazolidinone, oxazinone or oxazepinone ring; in the case of NR 8 SO 2 R 9 , a sultam ring; in the case of NR 8 SO 2 NR 8 R 9 , a thiazolidine dioxide or thiadiazinane dioxide ring;

in the form of base or of a pharmaceutically acceptable acid-addition salt.

2. The compound according to claim 1 , wherein R 2 represents a hydrogen or fluorine atom or a hydroxyl, C 1-6 -alkyl or NR 8 R 9 group;

in the form of base or of a pharmaceutically acceptable acid-addition salt.

3. The compound according to claim 1 , wherein n represents an integer equal to 2 and m represents an integer equal to 2;

in the form of base or of a pharmaceutically acceptable acid-addition salt.

4. The compound according to claim 1 , wherein A represents a group C 1-8 -alkylene; in the form of base or of a pharmaceutically acceptable acid-addition salt.

5. The compound according to claim 1 , wherein R 1 represents a group R 5 optionally substituted with one or more groups R 6 and/or R 7 ;

R 5 represents a phenyl, pyridyl, pyridazinyl, pyrimidinyl, pyrazinyl, quinolinyl, phthalazinyl or quinoxalinyl group;

R 6 represents a nitro, C 1-6 -alkyl, C 1-6 -alkoxy, C 1-6 -haloalkyl, C 1-6 -haloalkoxy, —O—(C 1-3 -alkylene)-O— or a halogen atom;

R 7 represents a phenyl group that may be substituted with one or more groups R 6 that may be identical to or different from each other; in the form of base or of a pharmaceutically acceptable acid-addition salt.

6. The compound according to claim 1 , wherein R 3 represents a trifluoromethyl, a C 1-6 -alkyl or a hydrogen atom; in the form of base or of a pharmaceutically acceptable acid-addition salt.

7. The compound according to claim 1 , wherein R 4 represents a group chosen from oxazolyl, isoxazolyl, furyl, imidazolyl, pyrazolyl, oxadiazolyl, thiadiazolyl and triazolyl groups; this group optionally substituted with one or more substituents chosen from a group C 1-6 -alkyl, COOR 8 , CON(R 8 )(C 1-3 -alkylene-NR 10 R 11 ), CONR 8 R 9 , phenyl; the phenyl group possibly being substituted with one or more substituents chosen from a halogen atom and a group C 1-6 -alkoxy;

R 8 and R 9 represent, independently of each other, a hydrogen atom or a group C 1-6 -alkyl, or form, together with the atom that bears them, a piperazine ring,

R 10 and R 11 represent, independently of each other, a hydrogen atom or a group C 1-6 -alkyl;

in the form of base or of a pharmaceutically acceptable acid-addition salt.

8. The compound according to claim 1 , wherein

R 1 represents a group R 5 optionally substituted with one or more groups R 6 and/or R 7 ;

R 5 represents a phenyl, pyridyl, pyrazinyl or quinolinyl group; R 6 represents a halogen atom;

R 7 represents a phenyl group that may be substituted with one or more groups R 6 that may be identical to or different from each other,

R 2 and R 3 represent a hydrogen atom;

R 4 represents a 3-carbamoylisoxazol-5-yl group;

n represents an integer equal to 2 and m represents an integer equal to 2;

A represents an alkylene group;

in the form of base or of a pharmaceutically acceptable acid-addition salt.

9. A process for preparing the compound of claim 1 , comprising the step consisting in reacting an amine of general formula (II),

in which A, R 1 , R 2 , m and n are as defined in the general formula (I) according to claim 1 , with a carbonate of general formula (III)

in which Z represents a hydrogen atom or a nitro group, and R 3 and R 4 are as defined in the general formula (I) according to claim 1 ,

in the presence of a base, in a solvent at a temperature between room temperature and the reflux point of the solvent.

10. A process for preparing the compound of claim 1 , comprising the step that consists in reacting an amine of general formula (II),

in which A, R 1 , R 2 , m and n are as defined in the general formula (I) according to claim 1 , with phenyl or 4-nitrophenyl chloroformate,

in the presence of a base, in a solvent at a temperature between 0° C. and room temperature, to give the carbamate derivative of general formula (IV),

in which A, R 1 , R 2 , m and n are as defined in the general formula (I) according to claim 1 , and Z represents a hydrogen atom or a nitro group;

and then in converting the carbamate derivative of general formula (IV) thus obtained into a compound of general formula (I), via the action of an alcohol of general formula HOCHR 3 R 4 (IIIa), in which R 3 and R 4 are as defined in the general formula (I) according to claim 1 ,

in the presence of a base, in a solvent at a temperature between room temperature and the reflux point of the solvent.

11. A pharmaceutical composition comprising the compound of claim 1 , in the form of base or of a pharmaceutically acceptable acid-addition salt.

12. The pharmaceutical composition of claim 11 , further comprising one or more pharmaceutically acceptable excipients.