Substituted 6,7-dihydro-5H-benzo[7]annulene compounds, processes for their preparation and therapeutic uses thereof

1. A compound of formula (I):

wherein:

R1 and R2 represent independently a hydrogen atom or a deuterium atom;

R3 represents a hydrogen atom, a —COOH group, a —OH group, or a —OPO(OH) 2 group;

R4 represents a hydrogen atom or a fluorine atom;

R5 represents a hydrogen atom or a —OH group;

wherein:

at least one of R3 or R5 is different from a hydrogen atom;

when R3 represents a —COOH group, a —OH group or a —OPO(OH) 2 group, then R5 represents a hydrogen atom; and

when R5 represents a —OH group, then R3 and R4 represent hydrogen atoms;

R6 is selected from the group consisting of

a phenyl group or a heteroaryl group comprising 3 to 9 carbon atoms and comprising from 1 to 3 heteroatoms independently selected from the group consisting of oxygen, nitrogen and sulphur, said phenyl and heteroaryl groups being unsubstituted or substituted with 1 to 3 substituents independently selected from the group consisting of a (C 1 -C 6 )-alkyl group unsubstituted or substituted with one or more fluorine atoms; a halogen atom; a —OH group; a (C 1 -C 6 )-alkoxy group unsubstituted or substituted with one or more fluorine atoms; a cyano group; a sulphur group substituted with 5 fluorine atoms or (C1-C 6 )-alkyl groups substituted with two or more fluorine atoms; a sulfonyl-(C 1 -C 6 )-alkyl group wherein said (C1-C 6 )-alkyl group is unsubstituted or substituted with two or more fluorine atoms; a silane group substituted with 3 (C1-C 6 )-alkyl groups; an amine group unsubstituted or substituted with one or more (C 1 -C 6 )-alkyl groups; an amide group unsubstituted or substituted with one or more (C1-C 6 )-alkyl groups; a heterocycloalkyl group saturated or partially saturated, comprising 3 to 5 carbon atoms and comprising 1 or 2 heteroatoms independently selected from the group consisting of oxygen, nitrogen and sulphur; and a heteroaryl group comprising 2 to 4 carbon atoms and comprising 1 to 3 heteroatoms selected from the group consisting of oxygen, nitrogen and sulphur and being unsubstituted or substituted with an oxo group; and

a cycloalkyl group or a heterocycloalkyl group comprising 4 to 9 carbon atoms and comprising 1 or 2 heteroatoms independently selected from the group consisting of oxygen, nitrogen and sulphur, said cycloalkyl or heterocycloalkyl groups being saturated or partially saturated and being unsubstituted or substituted with 1 to 4 substituents independently selected from the group consisting of a fluorine atom; a —OH group; a (C1-C 6 )-alkyl group; a —COOR7 group wherein R7 is an (C1-C 6 )-alkyl group; and an oxo group;

or a pharmaceutically acceptable salt thereof.

2. The compound of formula (I) according to claim 1 , wherein R6 is a phenyl group unsubstituted or substituted with 1 to 3 substituents independently selected from the group consisting of a (C 1 -C 6 )-alkyl group unsubstituted or substituted with one or more fluorine atoms; a halogen atom; a —OH group; a (C 1 -C 6 )-alkoxy group unsubstituted or substituted with one or more fluorine atoms; a cyano group; a sulphur group substituted with 5 fluorine atoms or (C1-C 6 )-alkyl groups substituted with two or more fluorine atoms; a sulfonyl-(C 1 -C 6 )-alkyl group wherein said (C 1 -C 6 )-alkyl group is unsubstituted or substituted with two or more fluorine atoms; a silane group substituted with 3 (C1-C 6 )-alkyl groups; an amine group unsubstituted or substituted with one or more (C 1 -C 6 )-alkyl groups; an amide group unsubstituted or substituted with one or more (C 1 -C 6 )-alkyl groups; a heterocycloalkyl group saturated or partially saturated, comprising 3 to 5 carbon atoms and comprising 1 or 2 heteroatoms independently selected from the group consisting of oxygen, nitrogen and sulphur; and a heteroaryl group comprising 2 to 4 carbon atoms and comprising 1 to 3 heteroatoms selected from the group consisting of oxygen, nitrogen and sulphur and being unsubstituted or substituted with an oxo group;

or a pharmaceutically acceptable salt thereof.

3. The compound of formula (I) according to claim 1 , wherein R6 is a phenyl group unsubstituted or substituted with 1 to 3 substituents independently selected from the group consisting of a methyl group; an ethyl group; an isopropyl group; a tert-butyl group; a —CHF 2 group; a —CF 3 group; a —CF 2 CH 3 group; a chlorine atom; a fluorine atom; a —OH group; a —OCH 3 group; a —OCH 2 CH 3 group; a —OCH 2 CH 2 F group; a —OCHF 2 group; a —OCH 2 CF 2 group; a —OCF 3 group; a —OCH 2 CF 3 group; a cyano group; a —SCHF 2 group; a —SCF 3 group; a —SF 5 group; a —SO 2 CH 3 group; a —SO 2 CF 3 group; a —Si(CH 3 ) 3 group; an oxetane group; a piperidine group; a morpholine group; a pyrrolidine group; and a triazolone group;

or a pharmaceutically acceptable salt thereof.

4. The compound of formula (I) according to claim 1 , wherein R3 is a —COOH group or a —OH group;

or a pharmaceutically acceptable salt thereof.

5. A compound 5-[4-[(3S)-1-(3-fluoropropyl)pyrrolidin-3-yl]oxyphenyl]-6-(1H-indol-5-yl)-8,9-dihydro-7H-benzo[7]annulen-3-ol; or a pharmaceutically acceptable salt thereof.

6. A compound 6-(2,4-dichlorophenyl)-5-[4-[(3S)-1-(3-fluoropropyl)pyrrolidin-3-yl]oxyphenyl]-8,9-dihydro-7H-benzo[7]annulene-2-carboxylic acid; or a pharmaceutically acceptable salt thereof.

7. A compound 5-[4-[(3S)-1-(3-fluoropropyl)pyrrolidin-3-yl]oxyphenyl]-6-[4-(trifluoromethoxy)phenyl]-8,9-dihydro-7H-benzo[7]annulen-2-ol; or a pharmaceutically acceptable salt thereof.

8. A compound 6-(6-ethoxy-2-fluoro-3-pyridyl)-1-fluoro-5-[4-[(3S)-1-(3-fluoropropyl)pyrrolidin-3-yl]oxyphenyl]-8,9-dihydro-7H-benzo[7]annulen-2-ol; or a pharmaceutically acceptable salt thereof.

9. A compound 6-(2-ethoxypyrimidin-5-yl)-5-[4-[(3S)-1-(3-fluoropropyl)pyrrolidin-3-yl]oxyphenyl]-8,9-dihydro-7H-benzo[7]annulen-2-ol; or a pharmaceutically acceptable salt thereof.

10. A compound [5-[4-[(3S)-1-(3-fluoropropyl)pyrrolidin-3-yl]oxyphenyl]-6-[4-(trifluoromethoxy)phenyl]-8,9-dihydro-7H-benzo[7]annulen-2-yl] dihydrogen phosphate; or a pharmaceutically acceptable salt thereof.

11. A pharmaceutical composition comprising a compound of formula (I) according to claim 1 , or a pharmaceutically acceptable salt thereof, and at least one pharmaceutically acceptable excipient.

12. A pharmaceutical composition comprising 5-[4-[(3S)-1-(3-fluoropropyl)pyrrolidin-3-yl]oxyphenyl]-6-(1H-indol-5-yl)-8,9-dihydro-7H-benzo[7]annulen-3-ol, or a pharmaceutically acceptable salt thereof, and at least one pharmaceutically acceptable excipient.

13. A pharmaceutical composition comprising 6-(2,4-dichlorophenyl)-5-[4-[(3S)-1-(3-fluoropropyl)pyrrolidin-3-yl]oxyphenyl]-8,9-dihydro-7H-benzo[7]annulene-2-carboxylic acid, or a pharmaceutically acceptable salt thereof, and at least one pharmaceutically acceptable excipient.

14. A pharmaceutical composition comprising 5-[4-[(3S)-1-(3-fluoropropyl)pyrrolidin-3-yl]oxyphenyl]-6-[4-(trifluoromethoxy)phenyl]-8,9-dihydro-7H-benzo[7]annulen-2-ol, or a pharmaceutically acceptable salt thereof, and at least one pharmaceutically acceptable excipient.

15. A pharmaceutical composition comprising 6-(6-ethoxy-2-fluoro-3-pyridyl)-1-fluoro-5-[4-[(3S)-1-(3-fluoropropyl)pyrrolidin-3-yl]oxyphenyl]-8,9-dihydro-7H-benzo[7]annulen-2-ol, or a pharmaceutically acceptable salt thereof, and at least one pharmaceutically acceptable excipient.

16. A pharmaceutical composition comprising 6-(2-ethoxypyrimidin-5-yl)-5-[4-[(3S)-1-(3-fluoropropyl)pyrrolidin-3-yl]oxyphenyl]-8,9-dihydro-7H-benzo[7]annulen-2-ol, or a pharmaceutically acceptable salt thereof, and at least one pharmaceutically acceptable excipient.

17. A pharmaceutical composition comprising [5-[4-[(3S)-1-(3-fluoropropyl)pyrrolidin-3-yl]oxyphenyl]-6-[4-(trifluoromethoxy)phenyl]-8,9-dihydro-7H-benzo[7]annulen-2-yl] dihydrogen phosphate, or a pharmaceutically acceptable salt thereof, and at least one pharmaceutically acceptable excipient.