N-(aminoheteroaryl)-1H-indole-2-carboxamide derivatives, preparation thereof and therapeutic use thereof

1. A compound of the formula (I):

wherein:

X 1 is selected from the group consisting of hydrogen, halogen, C 1 -C 6 -alkyl, C 3 -C 7 -cycloalkyl, C 3 -C 7 -cycloalkyl-C 1 -C 3 -alkylene, C 1 -C 6 -fluoroalkyl, cyano, C(O)NR 1 R 2 , nitro, C 1 -C 6 -thioalkyl, —S(O)—C 1 -C 6 -alkyl, —S(O) 2 —C 1 -C 6 -alkyl, SO 2 NR 1 R 2 , aryl-C 1 -C 6 -alkylene, aryl and heteroaryl; wherein the aryl and heteroaryl are optionally being substituted by one or more substituents chosen from halogen, C 1 -C 6 -alkyl, C 3 -C 7 -cycloalkyl, C 3 -C 7 -cycloalkyl-C 1 -C 3 -alkylene, C 1 -C 6 -fluoroalkyl, C 1 -C 6 -alkoxy, C 1 -C 6 -fluoroalkoxy, nitro or cyano group;

X 2 is selected from the group consisting of hydrogen, halogen, C 1 -C 6 -alkyl, C 3 -C 7 -cycloalkyl, C 3 -C 7 -cycloalkyl-C 1 -C 3 -alkylene, C 1 -C 6 -fluoroalkyl, C 1 -C 6 -alkoxy, C 3 -C 7 -cycloalkyl-C 1 -C 6 -alkylene-O—, C 1 C 6 -fluoroalkoxy, cyano, C(O)NR 1 R 2 , C 1 -C 6 -thioalkyl, —S(O)—C 1 -C 6 -alkyl, —S(O) 2 —C 1 -C 6 -alkyl, SO 2 NR 1 R 2 , aryl-C 1 -C 6 -alkylene, aryl and heteroaryl; wherein the aryl and heteroaryl optionally being substituted by one or more substituents chosen from halogen, C 1 -C 6 -alkyl, C 3 -C 7 -cycloalkyl, C 3 -C 7 -cycloalkyl-C 1 -C 3 -alkylene, C 1 -C 6 -fluoroalkyl, C 1 -C 6 -alkoxy, C 1 -C 6 -fluoroalkoxy, nitro or cyano group;

X 3 and X 4 represent, independently of one another, hydrogen, halogen, C 1 -C 6 -alkyl, C 3 -C 7 -cycloalkyl, C 3 -C 7 -cycloalkyl-C 1 -C 3 -alkylene, C 1 -C 6 -fluoroalkyl, C 1 -C 6 -alkoxy, C 3 -C 7 -cycloalkyl-C 1 -C 6 -alkylene-O—, C 1 -C 6 -fluoroalkoxy, cyano, C(O)NR 1 R 2 , nitro, NR 1 R 2 , C 1 -C 6 -thioalkyl, —S(O)—C 1 -C 6 -alkyl, —S(O) 2 —C 1 -C 6 -alkyl, SO 2 NR 1 R 2 , NR 3 COR 4 , NR 3 SO 2 R 5 , aryl-C 1 -C 6 -alkylene, aryl or heteroaryl, the aryl and heteroaryl optionally being substituted by one or more substituents chosen from halogen, C 1 -C 6 -alkyl, C 3 -C 7 -cycloalkyl, C 3 -C 7 -cycloalkyl-C 1 -C 3 -alkylene, C 1 -C 6 -fluoroalkyl, C 1 -C 6 -alkoxy, C 1 -C 6 -fluoroalkoxy, nitro or cyano group;

Z 1 , Z 2 , Z 3 and Z 4 represent, independently of one another, nitrogen or a C(R 6 ) group, wherein at least one of said group is nitrogen and at least one of said group is a C(R 6 ) group; and wherein the nitrogen atom or one of the nitrogen atoms present in the ring, defined as nitrogen of position 1, optionally being substituted by R 7 when the carbon atom in the 2 or 4 position with respect to this reference nitrogen is substituted by an oxo or a thio group;

n is equal to 0, 1, 2 or 3;

Y is selected from the group consisting of aryl and heteroaryl both of which are optionally substituted by one or more groups chosen from halogen, C 1 -C 6 -alkyl, C 3 -C 7 -cycloalkyl, C 3 -C 7 -cycloalkyl-C 1 -C 3 -alkylene, C 1 -C 6 -fluoroalkyl, hydroxy, C 1 -C 6 -alkoxy, C 3 -C 7 -cycloalkyl-C 1 -C 6 -alkylene-O—, C 1 -C 6 -fluoroalkoxy, cyano, C(O)NR 1 R 2, nitro, NR 1 R 2 , C 1 -C 6 -thioalkyl, thiol, —S(O)—C 1 -C 6 -alkyl, —S(O) 2 —C 1 -C 6 -alkyl, SO 2 NR 1 R 2 , NR 3 COR 4 , NR 3 SO 2 R 5 , aryl-C 1 -C 6 -alkylene or aryl group, the aryl and the aryl-C 1 -C 6 -alkylene optionally being substituted by one or more substituents chosen from halogen, C 1 -C 6 -alkyl, C 3 -C 7 -cycloalkyl, C 3 -C 7 -cycloalkyl-C 1 -C 3 -alkylene, C 1 -C 6 -fluoroalkyl, C 1 -C 6 -alkoxy, C 1 -C 6 -fluoroalkoxy, nitro or cyano group;

Ra and Rb represent, independently of one another, hydrogen, C 1 -C 6 -alkyl, C 3 -C 7 -cycloalkyl, C 3 -C 7 -cycloalkyl-C 1 -C 3 -alkylene, C 1 -C 6 -fluoroalkyl, hydroxy, C 1 -C 6 -alkoxy, C 3 -C 7 -cycloalkyl-C 1 -C 6 -alkylene-O—, C 1 -C 6 -fluoroalkoxy, aryl or heteroaryl group, it being possible for Ra and Rb optionally to be substituted by one or more Rc groups which are identical to or different from one another;

Rc is selected from the group consisting of halogen, C 1 -C 6 -alkyl, C 3 -C 7 -cycloalkyl, C 3 -C 7 -cycloalkyl-C 1 -C 3 -alkylene, C 1 -C 6 -fluoroalkyl, C 1 -C 6 -alkoxyl, C 3 -C 7 -cycloalkyl-C 1 -C 6 -alkylene-O—, C 1 -C 6 -fluoroalkoxy, C 1 -C 6 -thioalkyl, —S(O)—C 1 -C 6 -alkyl, —S(O) 2 —C 1 -C 6 -alkyl, cyano, C(O)NR 1 R 2 , NR 1 R 2 , S(O)NR 1 R 2 , NR 3 COR 4 , NR 3 SO 2 R 5 , OC(O)NR 1 R 2 , NR 3 COOR 4 , NR 3 CONR 1 R 2 , hydroxy, thiol, oxo, thio, aryl-C 1 -C 6 -alkylene, aryl and heteroaryl; wherein the aryl and the heteroaryl optionally being substituted by one or more substituents chosen from halogen, C 1 -C 6 -alkyl, C 3 -C 7 -cycloalkyl, C 3 -C 7 -cycloalkyl-C 1 -C 3 -alkylene, C 1 -C 6 -fluoroalkyl, C 1 -C 6 -alkoxyl, C 1 -C 6 -fluoroalkoxy, nitro or cyano group;

R 1 and R 2 represent, independently of one another, hydrogen, C 1 -C 6 -alkyl, C 3 -C 7 -cycloalkyl, C 3 -C 7 -cycloalkyl-C 1 -C 3 -alkylene, aryl-C 1 -C 6 -alkylene or aryl group; or R 1 and R 2 together form, with the nitrogen atom which carries them, an azetidinyl, pyrrolidinyl, piperidinyl, azepinyl, morpholinyl, thiomorpholinyl, piperazinyl or homopiperazinyl group, said group optionally being substituted by a C 1 -C 6 -alkyl, C 3 -C 7 -cycloalkyl, C 3 -C 7 -cycloalkyl-C 1 -C 3 -alkylene, aryl-C 1 -C 6 -alkylene, aryl or heteroaryl group;

R 3 and R 4 represent, independently of one another, hydrogen, C 1 -C 6 -alkyl, C 3 -C 7 -cycloalkyl, C 3 -C 7 -cycloalkyl-C 1 -C 3 -alkylene, aryl-C 1 -C 6 -alkylene, aryl or heteroaryl group;

R 5 represents C 1 -C 6 -alkyl, C 3 -C 7 -cycloalkyl, C 3 -C 7 -cycloalkyl-C 1 -C 3 -alkylene, aryl-C 1 -C 6 -alkylene, aryl or heteroaryl group;

R 6 represents hydrogen, halogen, C 1 -C 6 -alkyl, C 3 -C 7 -cycloalkyl, C 3 -C 7 -cycloalkyl-C 1 -C 3 -alkylene, C 1 -C 6 -fluoroalkyl, C 1 -C 6 -alkoxy, C 3 -C 7 -cycloalkyl-C 1 -C 6 -alkylene-O—, C 1 -C 6 -fluoroalkoxy, C 1 -C 6 -thioalkyl, —S(O)—C 1 -C 6 -alkyl, —S(O) 2 —C 1 -C 6 -alkyl, aryl, aryl-C 1 -C 6 -alkylene, heteroaryl, hydroxy, thiol, oxo or thio group; and

R 7 represents hydrogen, C 1 -C 6 -alkyl, C 3 -C 7 -cycloalkyl, C 3 -C 7 -cycloalkyl-C 1 -C 3 -alkylene, C 1 -C 6 -fluoroalkyl, C 1 -C 6 -alkoxyl, C 3 -C 7 -cycloalkyl-C 1 -C 6 -alkylene-O—, C 1 -C 6 -fluoroalkoxyl, aryl, aryl-C 1 -C 6 -alkylene or heteroaryl group;

it being possible for the nitrogen atom or atoms of the compound of general formula (I) to be in the oxidized form;

or a salt thereof.

2. The compound of formula (I) as claimed in claim 1 , wherein X 1 , X 2 , X 3 and X 4 are chosen, independently of one another, from hydrogen, halogen, C 1 -C 6 -alkyl or C 1 -C 6 -fluoroalkyl group.

3. The compound of formula (I) as claimed in claim 2 , wherein X 1 and X 4 represent hydrogen, and X 2 and X 3 are chosen, independently of one another, from hydrogen, halogen or C 1 -C 6 -fluoroalkyl group.

4. The compound of formula (I) as claimed in claim 1 , wherein Z 1 , Z 2 , Z 3 and Z 4 represent, independently of one another, nitrogen or C(R 6 ) group, and wherein at least two of them are C(R 6 ) group; the nitrogen atom or one of the nitrogen atoms present in the ring, defined as nitrogen of position 1, optionally being substituted by R 7 when the carbon atom in the 2 or 4 position with respect to this reference nitrogen is substituted by an oxo or thio group; R 6 and R 7 being as defined in claim 1 .

5. The compound of formula (I) as claimed in claim 4 , wherein Z 1 and Z 2 represent C(R 6 ) and Z 3 and Z 4 represent nitrogen, and wherein R 6 is hydrogen.

6. The compound of formula (I) as claimed in claim 4 , wherein Z 1 , Z 2 , Z 3 and Z 4 represent, independently of one another, nitrogen or C(R 6 ) group, and wherein one of said group is nitrogen and the others are C(R 6 ) group; the nitrogen atom present in the ring, defined as nitrogen of position 1, optionally being substituted by R 7 when the carbon atom in the 2 or 4 position with respect to this reference nitrogen is substituted by an oxo or thio group; R 6 and R 7 being as defined in claim 1 .

7. The compound of formula (I) as claimed in claim 6 , wherein Z 1 and Z 2 represent a C(R 6 ) group and Z 3 and Z 4 represent, independently of one another, nitrogen or a C(R 6 ) group, one of Z 3 and Z 4 is a C(R 6 ) group, and wherein R 6 is hydrogen, halogen, C 1 -C 6 -alkyl or C 1 -C 6 -fluoroalkyl.

8. The compound of formula (I) as claimed in claim 7 , wherein Z 4 is nitrogen and Z 1 , Z 2 and Z 3 represent, independently of one another, C(R 6 ) group, and wherein R 6 is hydrogen, halogen, C 1 -C 6 -alkyl or C 1 -C 6 -fluoroalkyl.

9. The compound of formula (I) as claimed in claim 8 , wherein n is 1.

10. The compound of formula (I) as claimed in claim 9 , wherein Y is aryl or heteroaryl optionally substituted by one or more halogen atoms.

11. The compound of formula (I) as claimed in claim 10 , wherein Ra and Rb represent, independently of one another, hydrogen, C 1 -C 6 -alkyl, C 3 -C 7 -cycloalkyl, C 3 -C 7 -cycloalkyl-C 1 -C 3 -alkylene, C 1 -C 6 -fluoroalkyl, hydroxy, C 1 -C 6 -alkoxy or C 3 -C 7 -cycloalkyl-C 1 -C 6 -alkylene-O—, it being possible for Ra and Rb to be optionally substituted by one or more Rc groups which are identical to or different from one another;

and wherein Rc is C 1 -C 6 -alkoxy, NH 2 or hydroxy.

12. The compound of formula (I) as claimed in claim 10 , wherein Ra and Rb represent, independently of one another, hydrogen, C 1 -C 6 -alkyl or C 3 -C 7 -cycloalkyl, it being possible for Ra and Rb to be optionally substituted by one or more Rc groups which are identical to or different from one another; and wherein Rc is an oxo group.

13. A process for the preparation of a compound of formula (I) as claimed in claim 1 , comprising:

reacting a compound of formula (IV):

wherein X 1 , X 2 , X 3 , X 4 , Y and n are as defined in claim 1 and B is chlorine, with an amine of formula (V):

wherein Z 1 , Z 2 , Z 3 , Z 4 , Ra and Rb are as defined in claim 1 , in a solvent.

14. A process for the preparation of a compound of formula (I) as claimed in claim 1 , comprising:

reacting a compound of formula (IV):

wherein X 1 , X 2 , X 3 , X 4 , Y and n are as defined in claim 1 and B is hydroxy, with an amine of formula (V):

wherein Z 1 , Z 2 , Z 3 , Z 4 , Ra and Rb are as defined in claim 1 , in the presence of a coupling agent and a base in a solvent.

15. A pharmaceutical composition comprising a compound of formula (I) as claimed in claim 1 or a pharmaceutically acceptable salt thereof, in combination with at least one pharmaceutically acceptable excipient.

16. A pharmaceutical composition comprising a compound of formula (I) as claimed in claim 12 or a pharmaceutically acceptable salt thereof, in combination with at least one pharmaceutically acceptable excipient.

17. A method of treating a disease in which receptors of TRPV1 are involved in a patient comprising administering to said patient a therapeutically effective amount of a compound of formula (I) as claimed in claim 1 wherein said disease is selected from the group consisting of pain, inflammation, urological disorders, gynecological disorders, gastrointestinal disorders, respiratory disorders, psoriasis, pruritus, irritation of the skin, eyes or mucous membranes, herpes or shingles, depression and diabetes.