EP2396334A1

EP2396334A1 - N-[(2-azabicyclo[2.1.1]hex-1-yl]-aryl-methyl]-benzamide derivatives, preparation thereof, and therapeutic use thereof

Info

Publication number: EP2396334A1
Application number: EP10708303A
Authority: EP
Inventors: Gihad Dargazanli; Geneviève ESTENNE-BOUHTOU; Abdel-Kader Mafroud
Original assignee: Sanofi SA
Current assignee: Sanofi SA
Priority date: 2009-02-10
Filing date: 2010-02-09
Publication date: 2011-12-21
Also published as: IL214490A0; UY32428A; BRPI1008660A2; MX2011008447A; KR20110118812A; SG173606A1; FR2941953A1; RU2011137463A; AU2010212702A1; FR2941953B1; WO2010092286A1; CA2751863A1; CN102388049A; AR075379A1; JP2012517411A; US20120071536A1; TW201036979A

Abstract

The invention relates to N-[(2-aza-bicyclo[2.2.1]hex-1-yl)-aryl-methyl]-benzamide derivatives of the general formula (I) where: R is a hydrogen atom or a (C₁-C₆)alkyl group, (C₃-C₇)-cycloalkyl, optionally substituted by one or more fluorine, (C₃-C₇)-cycloalkyl, (C₂-C₄)alkenyl, phenyl, (C₁-C₆)alkoxy, hydroxy; R₁ is phenyl or naphtyl optionally substituted by one or more halogen, (C₁-C₆)alkyl, (C₁-C₆)alkoxy, halo-(C₁-C₆)alkyl, NR₄R₅, (C₁-C₆)alkylthio, (C₁-C₆)alkyl-SO₂, phenyl or heteroaryl,; R₂ is one or more hydrogen or halogen atoms, halo-(C₁-C₆)alkyl, (C₁-C₆)alkyl, (C₃-C₇)cycloalkyl, (C₃-C₇)-cycloalkyl-(C₁-C₃)alkyl; R₃, R₄ and R₅ are independently a hydrogen atom or a (C₁-C₆)alkyl group; R₆ is a (C₁-C₆)alkyl group; R₃ and R₄ as well as R₃ and R₆ may form, together with the atoms having them, a 5- or 6-member ring; R₄ and R₅ may form together a ring selected from azetidine, pyrrolidine, piperidine, morpholine, thiomorpholine, piperazine, azepine, optionally substituted by a (C₁-C₆)alkyl group. The invention also relates to the therapeutic use thereof and to a method for synthesizing same.

Description

ZV-P-AZA-BICYCLOP-L [HEX-I-YL) -ARYL-METHYL] -BENZAMIDE DERIVATIVES, THEIR PREPARATION AND THEIR THERAPEUTIC USE.

The present invention relates to Λ / - [(2-aza-bicyclo [2.2.1] hex-1-yl) -aryl-methyl] -benzamide derivatives, to their preparation and their therapeutic application in the treatment of or the prevention of diseases involving glycine carriers Glyti.

The compounds of the invention correspond to the general formula (I)

in which: R represents a hydrogen atom or a group chosen from the (C ₆ -C ₆ ) alkyl, (C ₃ -C ₇ ) -cycloalkyl groups, these groups optionally substituted by one or more groups chosen independently from one another; the other of the fluorine atom, (C ₃ -C ₇ ) -cycloalkyl, (C ₂ -C ₄ ) alkenyl, phenyl, (C ₆ ) alkoxy, hydroxy; the phenyl group is optionally substituted with one or more (d-C ₆ ) alkoxy groups;

R 1 represents a phenyl or naphthyl group, optionally substituted by one or more substituents chosen independently of one another from halogen atoms, (C ₁ -C ₆ ) alkyl, (C ₁ -C ₆ ) alkoxy groups, halo (CrC ₆₎ alkyl, NR ₄ R _5, NR ₃ C (O) OR _4, NR ₃ SO ₂ R _4, NR ₃ C (O) R _6, hydroxy, halo (C _r C ₆₎ alkoxy, (C ₁ -C ₆ ) alkyl-thio, (C ₁ -C ₆ ) alkyl-SO ₂ , phenyl or heteroaryl, the phenyl group being optionally substituted by one or more substituents independently selected from halogen atoms, the groups (C ₁ -C ₆ ) C ₆ ) alkyl, (C ₁ -C ₆ ) alkoxy, halo- (C ₁ -C ₆ ) alkyl, NR ₄ R ₅ , NR ₃ C (O) OR ₄ , NR ₃ SO ₂ R ₄ , NR ₃ C (O) R ₆ , hydroxy, halo- (C _r C ₆ ) alkoxy, (C _r C ₆ ) alkyl-thio, (dC ₆ ) alkyl-SO ₂ , the heteroaryl group being optionally substituted with or a plurality of substituents independently selected from halogen atoms, (C ₁ -C ₆ ) alkyl, (C ₁ -C ₆ ) alkoxy, halo (C ₁ -C ₆ ) alkyl or NR ₄ R _{5 groups} ;

- R ₂ represents one or more substituents chosen from a hydrogen atom, halogen atoms, (C ₁ -C ₆ ) alkyl, (C ₃ -C ₇ ) cycloalkyl, (C ₃ -C ₇ ) - cycloalkyl- (dC ₃ ) alkyl, halo- (C ₁ -C ₆ ) alkyl, (C ₁ -C ₆ ) alkoxy, NR ₄ R ₅ , phenyl, heteroaryl, cyano, acetyl, (C ₁ -C ₆ ) thioalkyl, (C ₁ -C ₆ ) alkylsulfonyl , carboxy or (Ci-C ₆₎ alkoxycarbonyl; the phenyl group being optionally substituted by one or more substituents independently selected from halogen atoms, the groups (Ci-C ₆₎ alkyl, (d- C ₆₎ alkoxy, halo- (C _r _C6) alkyl, NR ₄ R ₅ , NR ₃ C (O) OR ₄ , NR ₃ SO ₂ R ₄ , NR ₃ C (O) R ₆ , hydroxy, halo- (C ₆ ) alkoxy, (C ₁ -C ₆ ) alkyl-thio, (C -C ₆ ) alkyl-SO ₂ ; the heteroaryl group being optionally substituted by one or more substituents chosen independently from halogen atoms, (C ₁ -C ₆ ) alkyl, (C ₁ -C ₆ ) alkoxy, halo- (d-C ₆ ) alkyl, NR ₄ R groups; ₅ ;

- R ₃ , R ₄ and R ₅ represent, independently of one another, a hydrogen atom or a (C ₁ -C ₆ ) alkyl group;

- R ₆ represents a group (dC ₆ ) alkyl;

R ₄ and R ₅ may together form, with the nitrogen atom which bears them, a ring chosen from the azetidine, pyrrolidine, piperidine, morpholine, thiomorpholine, piperazine and azepine rings, optionally substituted by a group (dC ₆ ) alkyl; - R ₃ and R ₄ can form together with the atoms that carry them, a 5- or 6-membered ring;

- R ₃ and R ₆ can form together with the atoms that carry them, a 5- or 6-membered ring; in the form of a base or an acid addition salt.

The compounds of formula (I) have an asymmetric carbon atom. They can therefore exist in the form of enantiomers. These enantiomers, including racemic mixtures, form part of the invention.

The compounds of formula (I) may exist in the form of bases or addition salts with acids. Such addition salts are part of the invention.

These salts are advantageously prepared with pharmaceutically acceptable acids, but the salts of other acids that are useful, for example, for the purification or the isolation of the compounds of formula (I) are also part of the invention. In the context of the invention, the following terms mean:

_Ct-Cz, where t and z can take the values from 1 to 6, a carbon chain which can have from t to z carbon atoms, for example Ci--C ₆ carbon chain which can have from 1 to 6 carbon atoms; alkyl, a saturated, linear or branched aliphatic group; for example, a (C ₁ -C ₆ ) alkyl group represents a linear or branched carbon chain of 1 to 6 carbon atoms, for example methyl, ethyl, propyl, isopropyl, butyl, isobutyl, tert-butyl, pentyl or hexyl; alkenyl, an aliphatic mono- or poly-unsaturated group, linear or branched, comprising for example one or two ethylenic unsaturations, alkylene, a saturated divalent alkyl group, linear or branched, for example a Ci _-6 alkylene group represents a carbon chain divalent from 1 to 6 carbon atoms, linear or branched, for example methylene, ethylene, 1-methylethylene, propylene, -amino, NH ₂ , alkoxy, -O-alkyl, acetyl, -C ( O) -, cyano, a -CN group, hydroxy, a -OH group, - a halogen atom, a fluorine, a chlorine, a bromine or an iodine, haloalkyl, an alkyl group of which one or more hydrogen atoms have have been substituted by halogen. By way of example, mention may be made of trifluoromethyl, trifluoroethyl pentafluoroethyl or heteroaryl groups, a 5- or 6-membered aromatic monocyclic group comprising from 1 to 3 heteroatoms chosen from nitrogen, oxygen and sulfur. As an example of a heteroaryl group, mention may be made of pyrrole, furan, thiophene, pyrazole, imidazole, triazole, tetrazole, oxazole, isoxazole, oxadiazole, thiazole, isothiazole, thiadiazole, pyridine, pyrimidine, pyrazine, pyridazine and triazine groups.

Among the compounds of general formula (I) that are the subject of the invention, a first group of compounds is constituted by compounds for which R represents a hydrogen atom or a (C ₁ -C ₆ ) alkyl group, optionally substituted with one or a plurality of groups independently selected from fluorine, (C ₂ -C ₄ ) alkenyl, hydroxy, (C ₃ -C ₇ ) -cycloalkyl or phenyl; R 1, R ₂ , R ₃ , R ₄ , R 5 and R ₆ being as defined above. Among the compounds of general formula (I) that are the subject of the invention, a second group of compounds is constituted by compounds for which R represents a hydrogen atom or a methyl, ethyl, propyl, / sobutyl or allyl group. the methyl, ethyl, and / or sobutyl groups being optionally substituted by one or more groups chosen independently of one another from the fluorine atom, the hydroxy group, a cyclopropyl or phenyl group; R 1, R 2, R B, R ₄ , R 5 and R ₆ being as defined above.

Among the compounds of general formula (I) which are subjects of the invention, a third group of compounds is constituted by the compounds for which R 1 represents a phenyl or naphthyl group, optionally substituted by one or more halogen atoms or groups (C 1 -C 4). C ₆ ) -alkyl, (C ₁ -C ₆ ) alkoxy, halo- (C ₁ -C ₆ ) alkyl, NR ₄ R ₅ or hydroxy; R, R ₂ , R 3, R ₄ , and R ₅ being as defined above.

Among the compounds of general formula (I) that are the subject of the invention, a fourth group of compounds is constituted by the compounds for which R 1 represents a phenyl or naphthyl group, optionally substituted by one or more halogen atoms or methyl or methoxy groups. trifluoromethyl, NH ₂ or hydroxy; R, R ₂ R ₄ and R ₅ being as defined above.

Among the compounds of general formula (I) that are the subject of the invention, a fifth group of compounds is constituted by the compounds for which R ₂ represents one or more substituents chosen from hydrogen, halogen atoms, NR ₄ R ₅ , (C ₁ -C ₆ ) alkoxy, halo- (C ₁ -C ₆ ) alkyl, (C ₁ -C ₆ ) alkylthio, (C ₁ -C ₆ ) alkyl-SO ₂ ; R, R ₁ , R ₃ , R ₄ , R ₅ and R ₆ being as defined above.

Among the compounds of general formula (I) which are subjects of the invention, a sixth group of compounds is constituted by the compounds for which R ₂ represents one or more substituents chosen from hydrogen, halogen atoms, methyl, ethyl, NH ₂ , methoxy, trifluoromethyl, methanesulfanyl, ethanesulfonyl,

R, R ₁ , R ₃ , R ₄ , R ₅ and R ₆ being as defined above. Among the compounds of general formula (I) that are the subject of the invention, a seventh group of compounds is constituted by the compounds for which:

- R represents a hydrogen atom or a methyl, ethyl, propyl, / sobutyl, allyl group, the methyl, ethyl, / sobutyl group being optionally substituted by one or more groups chosen independently of one another from the fluorine atom, the hydroxy, cyclopropyl or phenyl groups;

R 1 represents a phenyl or naphthyl group, optionally substituted by one or more halogen atoms or methyl, methoxy, trifluoromethyl, NH ₂ or hydroxyl groups; - R ₂ represents one or more substituents chosen from hydrogen, halogen atoms, methyl, ethyl, NH ₂ , methoxy, trifluoromethyl, methanesulfanyl, ethanesulfonyl, and their addition salts with an acid.

The combinations of groups one to seven below as defined above are also part of the invention.

Among the compounds of general formula (I) which are subjects of the invention, mention may especially be made of the following compounds: Λ / - [(4-Amino-phenyl) - (2-aza-bicyclo [2.1.1] hex-1 yl) -methyl] - (2-chloro-3-trifluoromethyl) -benzamide and its hydrochloride;

N - [(2-Azabicyclo [2.1.1] hex-1-yl) -m-tolyl-methyl] - (2-chloro-3-trifluoromethyl) -benzamide and its hydrochloride;

N - [(2-Azabicyclo [2.1.1] hex-1-yl) - (3-methoxy-phenyl) -methyl] - (2-chloro-3-trifluoromethyl) -benzamide and its hydrochloride;

N - [(2-Azabicyclo [2.1.1] hex-1-yl) - (3-trifluoromethyl-phenyl) -methyl] - (2-chloro-3-trifluoromethyl) -benzamide and its hydrochloride;

N - [(2-Azabicyclo [2.1.1] hex-1-yl) -phenylmethyl] - (2-chloro-3-trifluoromethyl) benzamide; 2-Amino-N - [(2-azabicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (5-bromo-4-chloro) -benzamide;

N - [(2-Aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-methyl-3-trifluoromethyl) benzamide;

N - [(2-Azabicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2,6-dichloro-3-trifluoromethyl) benzamide; N - [(2-Azabicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-chloro-5-trifluoromethyl) benzamide; and its hydrochloride;

N - [(2-Azabicyclo [2.1.1] hex-1-yl) -phenylmethyl] - (2-chloro-6-fluoro-3-methyl) benzamide; N - [(2-Azabicyclo [2.1.1] hex-1-yl) -phenylmethyl] - (2-chloro-5-methylsulfanyl) benzamide;

N - [(2-Aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-chloro-3-methyl) -benzamide and its hydrochloride;

(-) N - [(2-Aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-chloro-3-trifluoromethyl) -benzamide and its hydrochloride;

(+) - [(2-Aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-chloro-3-trifluoromethyl) benzamide and its hydrochloride;

N - [(2-Aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (4-chloro-5-ethanesulfonyl-2-methoxy) -benzamide and its hydrochloride; N - [(2-Azabicyclo [2.1.1] hex-1-yl) - (4-fluoro-phenyl) -methyl] - (2-chloro-3-trifluoromethyl) -benzamide;

N - [(2-Azabicyclo [2.1.1] hex-1-yl) -naphthalen-2-ylmethyl] - (2-chloro-3-trifluoromethyl) benzamide and its hydrochloride;

2-chloro-β- {phenyl- [2-methyl-2-aza-bicyclo [2.1.1] hex-1-yl] -methyl} - (3-trifluoromethylbenzamide) and its hydrochloride;

2-chloro-N - [(2-ethyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (3-trifluoromethyl) benzamide and its hydrochloride;

N - [(2-Allyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-amino-5-bromo-4-chloro) -benzamide; (2-Amino-5-bromo-4-chloro) -N- [phenyl- (2-propyl-2-aza-bicyclo [2.1.1] hex-1-yl) -methyl] -benzamide and its hydrochloride;

(2,6-Dichloro) -β- {[2- (2-hydroxy-2-methyl-propyl) -2-aza-bicyclo [2.1.1] hex-1-yl] -phenyl-methyl} - ( 3-trifluoromethyl) benzamide and its hydrochloride;

2,6-Dichloro-Λ- {phenyl- [2- (2,2,2-trifluoro-ethyl) -2-aza-bicyclo [2.1.1] hex-1-yl] -methyl} - (3- trifluoromethyl) benzamide;

N - [(2-Azabicyclo [2.1.1] hex-1-yl) - (3-hydroxy-phenyl) -methyl] - (2-chloro-3-trifluoromethyl) -benzamide and its hydrochloride;

2-Chloro-N - [(2-cyclopropylmethyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (3-trifluoromethyl) -benzamide and its hydrochloride: C +; 2-chloro-N - [(2-ethyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (3-trifluoromethyl) -benzamide and its hydrochloride;

N - [(2-Aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2,6-dimethyl) -benzamide and its hydrochloride; N - [(2-Azabicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-ethyl) -benzamide and its hydrochloride;

N - [(2-Azabicyclo [2.1.1] hex-1-yl) -m-tolyl-methyl] - (2,6-dichloro-3-trifluoromethyl) -benzamide and its hydrochloride;

N - [(2-Ethyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2,6-dimethyl) -benzamide and its hydrochloride;

2-ethyl-N - [(2-ethyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] -benzamide and its hydrochloride;

N - [(2-Aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (6-chloro-2-methyl-3-trifluoromethyl) benzamide and its hydrochloride; N - [(2-Benzyl-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-chloro-3-trifluoromethyl) -benzamide and its hydrochloride;

The compounds of the invention exhibit particular activity as inhibitors of Glyti glycine transporters, including an improved activity and safety profile.

The compounds of general formula (I) can be prepared by a process illustrated in Scheme 1 which follows.

SCHEME 1

( 'I)

Coupling of a diamine of general formula (II) in which R and R ₁ are as defined above, especially when R represents a hydrogen atom, an allyl or phenylmethyl group, with an activated acid, by for example via a mixed anhydride or an acid chloride of general formula (III) in which Y represents a leaving group derived for example from benzotriazole, acylurea or a halogen atom and R ₂ is as defined above, using methods known to those skilled in the art.

The compounds of general formula (I) in which R represents a hydrogen atom may also be prepared from compounds of general formula (I) in which R represents:

or a phenylmethyl group by deprotecting the nitrogen by hydrogenolysis,

or an alkenyl group, preferably allyl, by deprotecting the nitrogen, for example by a "zero" palladium complex according to the methods known to those skilled in the art.

The compounds of general formula (I) in which R is different from the hydrogen atom, can also be prepared from compounds of general formula (I) in which R represents a hydrogen atom, or by alkylation of said compound of general formula (I) with an RX type halide or mesylate, in which R is as defined above and X is mesylate or halogen, in the presence of a mineral base, for example potassium carbonate in acetonitrile ; either by an Eschweiler-Clarke type reaction or a reductive amination with an appropriate aldehyde or ketone according to the methods known to those skilled in the art; or with an appropriate epoxy derivative, according to the methods known to those skilled in the art. The compounds of general formula (I) in which the group R 1 is a phenyl group substituted by a hydroxyl may be obtained from the corresponding compound of general formula (I) substituted by a methoxy, using the methods known to man of the job.

The diamine of general formula (II) can be prepared by processes illustrated by Schemes 2 for the amine (IIa) and 3 for the amine (Nb) and (IIc) which follow:

SCHEME 2

(IIa) The ester (IV) is converted to the amide (V) by heating the trimethylaluminum complex and the appropriate amine, such as morpholine, under the reflux of a solvent such as toluene. The amine (V) may be deprotected to obtain the compound (VI) using a phenyllithium-type lithian in a solvent such as tetrahydrofuran at low temperature, for example at -70 ^° C. It is then proceeded to a Λ / allyl bromide-allyl in the presence of a base such as potassium carbonate, in a solvent such as acetonitrile at room temperature, to obtain the compound (VII). The morpholinic amide of formula (VII) is reacted with the lithiated aromatic compound of general formula (VIII), in which R 1 is as defined above, in an ethereal solvent such as ether or tetrahydrofuran, at low temperature. temperature. A ketone of general formula (IX) is thus obtained which is reacted with O-benzylhydroxylamine hydrochloride, under reflux of pyridine, to obtain a mixture of oxime Z / E of general formula (X).

The oxime (X) is then reduced at reflux of the ether by the lithium aluminum hydride double, to provide the diamine of general formula (IIa).

SCHEME 3

According to Scheme 3, a nitrile of formula (XI) is reacted with the lithiated aromatic compound of general formula (VIII), in which R 1 is as defined above, in an ethereal solvent such as tetrahydrofuran or ether, at low temperature, for example -70 ^° C. An imine is thus obtained which is reduced with a reducing agent such as sodium borohydride in a protic solvent such as methanol, to give the amine of general formula (Nb) . The amine (Nb) can be debenzylated by hydrogenation in the presence of palladium catalyst to provide the deprotected amine (Ile). Moreover, the chiral compounds of general formula (I) corresponding to the S or R enantiomers can be obtained by separation of the racemic compounds by high performance liquid chromatography (HPLC) on a chiral column, or could be obtained by resolution of the racemic amine of general formula (II) using a chiral acid, such as dibenzoyl-tartaric acid or by fractional and preferential recrystallization of a diastereoisomeric salt.

The ester of formula (IV) is prepared according to a method described in J. Org. Chem.

2003, 9348-9355.

The nitrile of formula (XI) is prepared according to a method described in Tetrahedron: Asymmetry, 2006 (17), 252-258.

The lithiated derivatives of general formula (VIII) can be prepared according to methods known to those skilled in the art.

Acids and acid chlorides of general formula (III) are commercially available or prepared by analogy with methods known to those skilled in the art.

The examples which follow illustrate the preparation of some compounds of the invention. In these examples:

Elemental microanalyses, I.R. and R.MN spectra and chiral column HPLC confirm the structures and enantiomeric purities of the compounds obtained,

- For NMR descriptions, "m" means multiplet, "s" singlet, "t" triplet, "d" doublet, "q" quadruplet, dxd means double doublet, txt means triple triplet, dxt double triplet, and so on.

- The numbers given in parentheses in the titles of the examples correspond to those in the first column of Tables 1 and 2,

- "decomp." means "decomposition",

- The roman numerals in parentheses correspond to the corresponding general formulas which are indicated in the synthesis diagrams,

- The nomenclature used is the nomenclature following IUPAC (International Union of Pure and Applied Chemistry) recommendations.

In the names of the compounds, the hyphen "-" is part of the word, and the hyphen "_" is only used for the cut at the end of the line; it must be deleted in the absence of a cut, and must not be replaced by a normal dash or a space. Example 1 (Compound No. 9): Λ - [(2-Azabicyclo [2.1.1] hex-1-yl) -phenylmethyl] - (2-chloro-5-trifluoromethyl) benzamide hydrochloride (1 : 1).

1.1 (2-Benzoyl-2-aza-bicylo [2.1.11hex-1-yl] -morpholin-4-yl-methanone (compound of formula V).

In a 500 ml three-necked flask under argon was added dropwise 10 ml of morpholine (1 15 mmol) to a solution of 29 ml of trimethylaluminum 2N (58 mmol) in 200 ml of anhydrous toluene and heated to 60 ⁰ C for 15 minutes. A solution of 20 g of 2-benzoyl-2-azabicyclo [2.1.1] hexane-1-carboxylic acid ethyl ester (77.1 mmol) in 190 ml of anhydrous toluene is canulated in the reaction medium. which is then heated overnight to reflux. After cooling, it is hydrolyzed carefully with 60 ml of water with stirring. The precipitate formed is filtered through Celite® and then rinsed with dichloromethane. The filtrate is evaporated under reduced pressure.

The residue obtained is triturated in ether. 18.35 g of 2-benzoyl-2-azabicyclo [2.1.1] hex-1-yl) -morpholin-4-yl-methanone of general formula (V) are thus obtained in the form of a dark beige solid. . ¹ H NMR (400 MHz, DMSO-d 6) δ ppm 7.69 (d, J = 8 Hz, 2H), 7.56-7.45 (m, 3H), 3.76 (d, J = 7, 7 Hz, 1H), 3.64-3.26 (m, 9H), 2.73 (t, J = 2.7 Hz, 1H), 2.10 (m, 2H), 1.97 ( m, 1H), 1.52 (m, 1H). Mp 176-177 ° C

1.2. (2-Aza-bicylo [2.1.11hex-1-yl] -morpholin-4-yl-methanone (Formula VII compound

1 g of 2-benzoyl-2-aza-bicyclo [2.1.1] hex-1-yl) -morpholin-4-yl-methanone (V) (33.3 mmol) were placed in 1 L three-neck under argon. ) in 400 ml of anhydrous tetrahydrofuran at -70 ^° C. 50 ml of 0.8 M phenyl lithium (cyclohexane / ether) (40 mmol) are added dropwise and the resulting solution is left for 1 hour at -70 ^° C. .

It is hydrolyzed with 100 ml of water and allowed to rise to room temperature. After extraction, the organic phase is concentrated and the residue is taken up in ether. This ether phase is poured into the previously acidified aqueous phase. After extraction, the aqueous phase is basified with ammonia and extracted with dichloromethane (3x200 ml). The organic phases are dried over sodium sulphate, filtered and evaporated under reduced pressure. 5.2 g of (2-azabicyclo [2.1.1] hex-1-yl) -morpholin-4-yl-methanone (VI) are thus obtained in the form of a dark beige solid. ¹ H NMR (400 MHz, DMSO-d 6) δ ppm 3.71 (m, 2H), 3.55 (m, 4H), 3.44 (m, 2H), 2.87 (s, 2H), 2 , 69 (widened, 1H), 2.60 (t, J = 2.9 Hz, 1H), 1.84 (m, 2H), 1.43 (m, 2H). PF: 97.5-98 ⁰ C

1.3. (2-Allyl-2-aza-bicyclo [2.1.11hex-1-yl] -morpholin-4-yl-methanone (compound of formula VII).

In a 500 ml flask, 7.4 g of (2-aza-bicyclo [2.1.1] hex-1-yl) -morpholin-4-yl-methanone (VI) (37.7 mmol) are placed in 100 ml. ml of acetonitrile and 10.4 g of potassium carbonate (75.4 mmol). To this suspension is added dropwise a solution of 3.9 ml of allyl bromide (45.2 mmol). The reaction medium is stirred overnight at room temperature and then concentrated under reduced pressure. The residue is solubilized in 100 ml of dichloromethane. The organic phase is washed with water, dried over sodium sulphate, filtered and then evaporated under reduced pressure. 8.9 g of (2-allyl-2-aza-bicyclo [2.1.1] hex-1-yl) -morpholin-4-yl-methanone of general formula (VII) are thus obtained in the form of an oil.

¹ H NMR (400 MHz, DMSO-d 6) δ ppm 5.85 (m, 1H), 5.24 (m, 1H), 5.09 (m, 1H), 3.78 (t extended, J = 4.7 Hz, 2H), 3.54 (m, 4H), 3.44 (m, 2H), 3.05 (broadened d, J = 5.7 Hz, 2H), 2.69 (s). expanded, 2H), 2.56 (t extended, J = 3 Hz, 1H), 1.83 (m, 2H), 1.68 (m, 2H).

1.4 (2-Allyl-2-aza-bicyclo [2.1.11hex-1-yl] -phenylmethanone (compound of general formula IX).

In a three-necked 250 ml under argon, 3.2 g of (2-allyl-2-azabicyclo [2.1.1] hex-1-yl) -morpholin-4-yl-methanone (VII) (13) are placed 5 mmol) in 70 ml of tetrahydrofuran at -70 ^° C. 16.2 ml of 1 M phenyllithium are added dropwise.

(cyclohexane / ether) and left for 1 hour at -70 ^° C. After hydrolysis with 20 ml of water, allowed to warm to room temperature. After evaporation of the solvent under reduced pressure, the residue is taken up in ethyl acetate. After extraction, the organic phase is dried over sodium sulphate, filtered and evaporated under pressure scaled down. The residue is purified by column chromatography on silica gel, eluting with a mixture of petroleum ether and ethyl acetate. 2 g of (2-allyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenylmethanone are thus obtained in the form of an oil (compound of general formula IX).

¹ H NMR (400 MHz, DMSO-d6) δ ppm 8.28 (m, 2H), 7.64 (txt, J = 7.3 and 1.4 Hz, 1H), 7.52 (m, 2H) ), 5.73 (m, 1H), 5.20 (m, J = 17 and 2 Hz, 1H), 5 (m, J = 10 and 2 Hz, 1H), 2.99 (dxt, J = 5.6 and 1.5 Hz, 2H), 2.86 (s, 2H), 2.70 (t, J = 2.9 Hz, 1H), 1.99-1.85 (m, 4H).

1.5. (2-Allyl-2-aza-bicyclo [2.1.11hex-1-yl] -phenylmethanone O-benzyloxime

(compound of general formula X).

In a 50 ml flask, 0.8 g of 2-allyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenylmethanone (IX) (3.7 mmol) is placed in 12 ml of pyridine and then added 0.91 g of O-benzylhydroxylamine hydrochloride (7.4 mmol). The reaction medium is heated overnight under reflux and then concentrated under reduced pressure. The residue is taken up in basified water with ammonia and then extracted 3 times with dichloromethane. The organic phases are combined, washed in saturated sodium chloride solution and then dried over sodium sulfate, filtered and evaporated under reduced pressure. The crude product is purified by chromatography on a column of silica gel, eluting with a mixture of dichloromethane and ammoniacal methanol. There is thus obtained 1.2 g of (2-allyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methanone O-benzyl oxime of general formula (X) in the form of an oil.

¹ H NMR (400 MHz, DMSO-d6) δ ppm 7.49 to 7.45 (m, 2H), 7.42 to 7.26 (m, 8H), 5.76 (m, 1H), 5 , 17 (m, J = 17 Hz and 1.7 Hz, 1H), 5.09 (s, 1H), 5.03 (m, 1H), 3.06 (dxt, J = 5.9 Hz and 1.4 Hz, 2H), 2.66 (s extended, 2H), 2.62 (t extended, J = 3 Hz, 2H), 1.79 (m, 2H), 1.63 (m, 2H).

1.6. (2-Allyl-2-aza-bicyclo [2.2.1hex-1-yl] -phenyl-methylamine (IIa).

In a three-necked 50 ml under nitrogen, place 0.32 g of lithium aluminum hydride (8.4 mmol) in 15 ml of ether. A solution of 0.7 g of (2-allyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenylmethanone O-benzyl oxime (X) is then added. (2.1 mmol) in 3 ml of ether and then heated at 40 ⁰ C for 3 hours. After cooling, the reaction medium is hydrolyzed at 0 ^° C. with 1.4 ml of a 0.1 M aqueous solution of double tartrate overnight.

After filtration of the reaction medium, the filtrate is concentrated under reduced pressure. The residue is purified by chromatography on a column of silica gel, eluting with a mixture of dichloromethane and ammoniacal methanol. 0.3 g of (2-allyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methylamine (IIa) are thus obtained in the form of an oil.

¹ H NMR (400 MHz, DMSO-d6) δ ppm 7.36 to 7.15 (m, 5H), 5.87 (m, 1H), 5.23 (m, 1H), 5.06 ( m, 1H), 4.14 (s, 1H), 3.36 (m, J = 13.5 and 5.5 Hz, 1H), 3.06 (m, J = 13.5 and 6). , 4Hz, 1H), 2.76 (d widened, J = 8Hz, 1H), 2.43 (m, 2H), 1.78 (s extended, 2H), 1, 39-1, 21 (m, 3H), 1.08 (m, 1H).

17β- (2-Allyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl-2-chloro-5-trifluoromethyl-benzamide (1a).

In a 25 ml flask, 0.15 g of (2-allyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenylmethylamine (IIa) (0.66 mmol) is placed in 3 ml. dichloromethane at 0 ^° C. in the presence of 0.18 g of potassium carbonate (1.31 mmol). A solution of 0.19 g of 2-chloro-5-trifluoromethylbenzoic acid chloride (0.79 mmol) in 2 ml of dichloromethane is added and stirred overnight at room temperature. The reaction medium is then diluted with 10 ml of dichloromethane and then washed successively with water (5 ml), 1N sodium hydroxide (5 ml) and in a saturated solution of sodium chloride (5 ml). The organic phase is dried over sodium sulfate, filtered and evaporated under reduced pressure. The residue is purified by chromatography on a column of silica gel, eluting with a mixture of dichloromethane and ammoniacal methanol. 0.24 g of Λ- [(2-allyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-chloro-5-trifluoromethyl) -benzamide are thus obtained. (la) as an oil.

¹ H NMR (400 MHz, DMSO-d 6) δ ppm 9.10 (d, J = 8.8 Hz, 1H), 7.85 (dxd, J = 8.5 and 2.3 Hz, 1H) , 7.78 (d, J = 8.5Hz, 1H), 7.64 (dxd, J = 2.2Hz, 1H), 7.43-7.25 (m, 5H), 5, 86 (m, 1H), 5.36 (d, J = 8.7 Hz, 1H), 5.27 (m, 1H), 5.10 (m, 1H), 3.40-3. , 27 (m, 3H), 3.19 (m, 1H), 2.79 (m, J = 8.4 Hz, 1H), 1.53 (m, 1H), 1, 45-1. , 29 (m, 3H). 1.8. Λ N- (2-aza-bicyclo [1,2,11-hex-1-yl] -phenyl-methyl-2-chloro-5-trifluoromethyl-benzamide hydrochloride (1: 1).

In a 10 ml flask under argon with a condenser is placed 3.5 mg of palladium tetrakis (triphenylphospine) (0.003 mmol) and 0.14 g of N, N-dimethylbarbituric acid (0.9 mmol) in solution. in 1 ml of dichloromethane. The reaction medium is heated to 40 ^° C. before adding 0.13 g of Λ- [(2-allyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - ( 2-chloro-5-trifluoromethyl) -benzamide (1a) (0.3 mmol) in 2 ml of dichloromethane, and the mixture is then heated for a further 2 hours at 40 ^° C. After cooling, it is diluted with 10 ml of dichloromethane and then hydrolyzed with 5 ml of a solution of sodium carbonate.

The organic phase is separated and washed twice with 5 ml of 1N hydrochloric acid. The aqueous phases are combined and then basified with aqueous ammonia at pH 9 and then extracted twice with 25 ml of dichloromethane. The organic phases are dried over sodium sulphate, filtered and evaporated under reduced pressure. 0.1 g of Λ- [(2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-chloro-5-trifluoromethyl) -benzamide are thus obtained, which is salified under form of hydrochloride by solubilization of the base in ether and then adding an excess of 1 N hydrochloric acid in ether. The solid obtained is filtered and then dried under vacuum.

¹ H NMR (400 MHz, DMSO-d 6) δ ppm 9.48 (d, J = 8.8 Hz, 1H), 9.13 (m, 1H), 8 (d, J = 2.1 Hz) , 1H), 7.88 (dxd, J = 8.6 and 2.3 Hz, 1H), 7.78 (d, J = 8.6 Hz, 1H), 7.50-7.35 (m, 5H), 5.69 (d, J = 8.8 Hz, 1H), 3.41-3.19 (m, 2H), 2.79 (t, J = 3 Hz, 1H) , 2.03 (m, 1H), 1.79 (m, 1H), 1.55 (m, 2H). Mp = 162.5-163.5 ° C

Example 2 (Compound No. 5): N - [(2-Azabicyclo [2.1.1] hex-1-yl) -phenylmethyl] - (2-chloro-3-trifluoromethyl) -benzamide Hydrochloride ( 1: 1).

2.1 (2-Benzyl-2-aza-bicyclo [2.1.11hex-1-yl] -phenyl-methylamine of the general formula (Nb).

In a three-necked 500 ml under argon, 3 g of 2-benzyl-2-azabicyclo [2.1.1] hexane-1-carbonitrile (Xl) (15.1 mmol) are placed at -70 ^° C. in 100 ml. anhydrous tetrahydrofuran. 37.8 ml of a 0.8 M solution (cyclohexane / ether) of phenyl lithium (30.2 mmol) are added dropwise. It is left for 2 hours and a half at -70 ^° C. and then hydrolyzed at -20 ^° C. with 30 ml of water.

After extraction, the organic phase is concentrated and the residue is taken up in 40 ml of methanol. 2.8 g of sodium borohydride (75 mmol) are added in portions. The reaction medium is left stirring overnight at room temperature.

After evaporation under reduced pressure, the residue is taken up in 100 ml of ether and 100 ml of water. The medium is acidified with a 1N hydrochloric acid solution, and then the ether phase is extracted.

The aqueous phase is basified with ammonia and then reextracted twice with 100 ml of dichloromethane. The organic phases are combined, then dried over sodium sulphate, filtered and evaporated under reduced pressure. 4.15 g of (2-benzyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methylamine (Nb) are thus obtained in the form of an oil which crystallizes in the cold.

¹ H NMR (200 MHz ₁ CDCl ₃ ) δ ppm 7.6-7.3 (m, 5H), 4.4 (s, 1H), 4.2 (d, J = 16 Hz, 1H), 3.6 (d, J = 16Hz, 1H), 3.0 (d, J = 9Hz, 1H), 2.6 (m, 1H), 2.4 (d, J = 9Hz) , 1H), 1, 8 (broad, 2H), 1, 6-1, 2 (m, 4H). Mp 63.5 to 64 ° C.

An analytical sample is obtained in hydrochloride form by solubilization of the base in ether, addition of an excess of 1N hydrochloric acid in ether and concentration under reduced pressure mp = 140-142 ° C.

2.2 (2-Aza-bicyclo-1,2,1-hex-1-yl) -phenyl-methylamine (Ile)

In a Parr flask, 0.43 g of (2-benzyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl) are placed under 4 atmospheres of hydrogen at 40 ^° C. for 3 hours. methylamine (Nb) (1. 54 mmol) in 20 ml of ethanol and 5 ml of 1 N hydrochloric acid in the presence of a tip of palladium spatula on charcoal 10%.

After filtration of the catalyst and concentration under reduced pressure, the residue is taken up in 30 ml of dichloromethane and 30 ml of water basified with ammonia. After extraction, the organic phase is dried over sodium sulfate, filtered and evaporated under reduced pressure. 0.24 g of (2-aza-bicyclo [2.1.1] hex-1 are thus obtained. yl) -phenyl-methylamine (Ile) in the form of a yellow oil which solidifies in the cold and which is used as it is in the next step. M.p. = 46.5-47 ° C

An analytical sample is obtained in hydrochloride form by solubilization of the base in ether, addition of an excess of 1N hydrochloric acid in ether, and concentration under reduced pressure.

¹ H NMR (400 MHz, DMSO-d 6) δ ppm 10.12-8.71 (m, 4H), 7.46-7.35 (m, 6H), 4.83 (m, 1H), 3 , (M, 2H), 2.72 (m, 1H), 2.10 (m, 1H), 1.89 (m, 1H), 1. 57 (t expanded, J = 9.3 Hz, 1H), 1, 36 (t extended, J = 9.3 Hz, 1 H). PF = 220-223 ^° C decomp.

2.3 - (2-aza-bicyclo [2.2.1] hex-1-yl) -phenyl-methyl-2-chloro-3-trifluoromethyl-benzamide hydrochloride (1: 1) In a 250 ml flask, 2.4 g of (2-chloro-3-trifluoromethyl) benzoic acid (10.8 mmol), 1.45 g of hydroxybenzotriazole (10.8 mmol), 2.1 g of hydrochloride of - (dimethylamino) propyl] -3-ethylcarbodiimide (10.8 mmol) in solution in 20 ml of dichloromethane and the mixture is stirred at room temperature for 15 minutes, to which 1.7 g (9.0 mmol) of (2-Azabicyclo [2.1.1] hex-1-yl) -phenyl-methylamine (Ile) dissolved in 20 ml of dichloromethane and stirred at room temperature overnight The reaction medium is then diluted with 10 ml of dichloromethane and then washed successively with water (5 ml), 1N sodium hydroxide (5 ml) and a saturated solution of sodium chloride (5 ml) The organic phase is dried over sodium sulphate, filtered and evaporated under reduced pressure.

There is thus obtained 1.8 g of Λ- [(2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-chloro-3-trifluoromethyl) -benzamide. An analytical sample is obtained in hydrochloride form by solubilization of the base in dichloromethane, addition of an excess of 1 N hydrochloric acid in ether and concentration under reduced pressure.

¹ H NMR (400 MHz, DMSO-d 6) δ ppm 9.09 (d, J = 9 Hz, 1H), 7.94 (dxd, J = 7.8 Hz and 1.8 Hz, 1H), 7.68 (m, 1H), 7.63 (m, 1H), 7.41-7.31 (m, 4H), 7.27 (m, 1H), 5.33 (d, J); = 8.8 Hz, 1H), 2.78 (m, 2H), 2.64 (t, J = 2.9 Hz, 1H), 2.20 (m, 1H), 1.68 (m, 1H), m, 2H), 1, 14 (m, 2H). Mp 148-150 ° C Example 3 (Compound No. 19): 2-Chloro-N - [(2-ethyl-2-azabicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (3-trifluoromethyl) hydrochloride ) -benzamide (1: 1).

25 g of 0.15 g of Λ- [(2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-chloro-3-trifluoromethyl) are placed in a 25 ml flask. benzamide (0.38 mmol) and 0.10 g of potassium carbonate (0.76 mmol) in 2 ml of acetonitrile, to which 40 μl of iodoethane (0.46 mol) are added. The reaction medium is stirred overnight at room temperature and then concentrated under reduced pressure. The residue is then diluted with 10 ml of dichloromethane and washed with water (5 ml).

The organic phase is dried over sodium sulfate, filtered and evaporated under reduced pressure. There is thus obtained 82 mg of 2-chloro-N - [(2-ethyl-2-azabicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (3-trifluoromethyl) -benzamide which is salified in hydrochloride form by solubilization of the base in dichloromethane, addition of an excess of 1 N hydrochloric acid in ether and concentration under reduced pressure.

¹ H NMR (400 MHz, DMSO-d 6) δ ppm 9.06 (d, J = 8.6 Hz, 1H), 7.94 (dxd, J = 7.3 Hz and 2.1 Hz, 1H) ), 7.67-7.59 (m, 2H), 7.37 (m, 4H), 7.28 (m, 1H), 5.33 (d, J = 8.8 Hz, 1H) , 2.76-2.52 (m, 5H), 1.50 (m, 1H), 1.37 (m, 3H), 1.04 (t, J = 7.2 Hz, 3H). Mp = 152-155 ° C

EXAMPLE 4 (Compound No. 22): (2,6-Dichloro) -β- {[2- (2-hydroxy-2-methyl-propyl) -2-aza-bicyclo [2.1.1] hexyl) hydrochloride 1-yl] -phenylmethyl} - (3-trifluoromethyl) benzamide (1: 1).

In a sealed tube under argon, 196 mg of Λ- [(2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2,6-dichloro-3-trifluoromethyl) benzamide (0.46 mmol) in 2 ml of absolute ethanol in the presence of 0.81 ml of 2,2-dimethyloxirane (9.13 mmol). The reaction medium is heated in the microwave at 100 ^° C. for 40 minutes. After evaporation of the solvent under reduced pressure, the residue is taken up in a mixture of water and dichloromethane. After extraction, the organic phase is dried over sodium sulfate, filtered and evaporated under reduced pressure. The residue is purified by chromatography on a column of silica gel, eluting with a mixture of dichloromethane and methanol. 58 mg of (2,6-dichloro) -β- {[2- (2-hydroxy-2-methyl-propyl) -2-aza-bicyclo [2.1.1] hex-1-yl] are thus obtained. phenyl-methyl} - (3- trifluoromethyl) -benzamide in the form of an oil which is salified by solubilization in ether, addition of an excess of 1N hydrochloric acid in ether and concentration under reduced pressure.

¹ H NMR (400 MHz, DMSO-d6) δ ppm 9.91 to 9.46 (m, 2H), 7.97 (m, 1H), 7.79 (m, 1 H), 7.60 - 7.29 (m, 5H), 5.87 -5.54 (m, 1H), 5.31 (m, 1H), 3.93 - 3.21 (m, 4H), 2.75 (m, 1H), 2.25 -1.43 (m, 4H), 1.31 (m, 6H). PF: 178.5-179.0 ⁰ C

Example 5 (Compound No. 23): (2,6-Dichloro) -N- (phenyl- [2- (2,2,2-trifluoro-ethyl) -2-azabicyclo [2.1.1] hex) 1-yl] methyl} - (3-trifluoromethyl) -benzamide.

In a sealed tube under argon, 1 17 mg of Λ / - [(2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2,6-dichloro-3-trifluoromethyl) ) -benzamide (0.27 mmol) in 1.5 ml of absolute ethanol in the presence of 46 mg of sodium hydrogencarbonate (0.55 mmol) and 64 mg of 2,2,2-trifluoroethyl ester; trifluoromethanesulfonic acid (0.27 mmol). The reaction medium is heated at 100 ^° C. for 4 hours. After evaporation of the solvent under reduced pressure, the residue is taken up in water and dichloromethane. After extraction, the organic phase is dried over sodium sulfate, filtered and evaporated under reduced pressure. The residue is purified by chromatography on a column of silica gel, eluting with a mixture of dichloromethane and methanol. 58 mg of (2,6-dichloro) -β- {phenyl- [2- (2,2,2-trifluoro-ethyl) -2-aza-bicyclo [2.1.1] hex-1-yl are thus obtained. ] -methyl} -3- (trifluoromethyl) benzamide. ¹ H NMR (400 MHz, DMSO-d6) δ ppm 7.59 (d, J = 8.5 Hz, 1H), 7.40 to 7.17 (m, 5H), 6.62 (m, 1 H), 5.08 (d, J = 5Hz, 1H), 3.26 (m, 1H), 3.07 (d, J = 8.8Hz, 1H), 2.92 (m). , 1H), 2.72 (d, J = 8.8 Hz, 2H), 2.57 (m, 1H), 1. 55 -1, 12 (m, 4H). Mp 82-83 ° C

Example 6 (Compound No. 18): 2-Chloro-N - [(2-methyl-2-azabicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (3-trifluoromethyl) hydrochloride ) -benzamide (1: 1).

25 g of 0.15 g of Λ- [(2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-chloro-3-trifluoromethyl) are placed in a 25 ml flask. benzamide (0.39 mmol) and 2 ml of formaldehyde in 2 ml of formic acid. The reaction mixture is heated at 100 ^° C. overnight. After cooling, the medium is hydrolyzed, basified to pH = 9 with ammonia and then extracted with ethyl acetate. The organic phase is dried over sodium sulfate, filtered and evaporated under reduced pressure. We obtain the (2,6- dichloro) -Λ / - [(2-methyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] -3- (trifluoromethyl) benzamide as an oil which is salified by solubilization of the base in ether, addition of an excess of 1 N hydrochloric acid in ether and concentration under reduced pressure. 80 mg of (2,6-dichloro) -β - [(2-methyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (3-trifluoromethyl) hydrochloride are obtained ) -benzamide.

¹ H NMR (400 MHz, DMSO-d 6) δ ppm 10.80 - 10.42 (m, 1H), 9.51 (m, 1H), 8.31-7.29

(m, 8H), 5.78 (m, 1H), 4.01-1.03 (m, 10H).

Mp 168.5-169.5 ° C

The other compounds described in Table 1 are obtained according to the methods described in Examples 1 to 7 from the amines of formula (IIa), (Nb), (IIc), lithiens of formula (VIII), derivatives of carboxylic acids of formula (III) or suitable alkylating agents.

Table 1 which follows illustrates the chemical structures of some compounds of the invention. In the picture :

- In the "Salts" column, - denotes a compound in the basic state, "HCI", means a hydrochloride, the number in parenthesis indicates the ratio (acid: base), - In columns R, R 1 and R ₂ :

- "Cl" means chlorine,

- "Br" means bromine,

- "CH ₃ " means methyl,

- "C ₂ H ₅ " means ethyl, - "NH ₂ " means amino,

- "OCH ₃ " means methoxy,

- "Ph" means phenyl,

- "SO ₂ C ₂ H ₅ " means ethanesulfonyl,

- "CF ₃ " means trifluoromethyl, - in the "R ₂ " column, the number in front of the substituents indicates their position in the general formula (I),

- The compounds of the table are in the form of hydrochloride solvated with one or more molecules of water, the compounds n ° 13 and 14 of the table form a pair of enantiomers which are separated by preparative HPLC, by using a CHIRALpak ^® AD 20μm column and as solvent a 95/5 isohexane / propan-2-ol mixture.

Table 2 gives the physical properties, melting points and rotational potency of the compounds of Table 1. In Table 2:

the column [α _D ] ₂ o ° c gives the result of analysis of the rotatory power of the compounds of the table at the wavelength of 589 nM and at a temperature of 20 ^° C. The solvent indicated in parentheses corresponds to the solvent used to measure the rotational power in degrees and the letter "c" indicates the concentration of the solvent in g / 100 ml, "NA" means that the measurement of the rotatory power is not applicable,

the "LCMS MH ⁺ " column gives information on the molecular ion (M + H +) or (M +) observed by mass spectrometry analysis of the products, or by LC-MS (liquid chromatography coupled to Mass Spectroscopy) carried out on an apparatus of Agilent LC-MSD Trap in ESI positive mode, either by direct MS (Mass Spectroscopy) on an Autospec M (EBE) device using the DCI-NH ₃ technique or by using the electronic impact technique on a type Waters GCT.

TABLE 1 TABLE 2

The compounds of the invention have been subjected to a series of pharmacological tests which have demonstrated their interest as substances with therapeutic activities. Study of the glycine transport in SK-N-MC cells expressing the native glyti human transporter.

[14C] glycine uptake is studied in SK-N-MC cells (human neuroepithelial cells) expressing the native human glyti transporter by measuring the radioactivity incorporated in the presence or absence of the test compound. The cells are cultured in monolayer for 48 h in 0.02% fibronectin pretreated plates. On the day of the experiment, the culture medium is removed and the cells are washed with Krebs-HEPES buffer ([4- (2-hydroxyethyl) piperazine-1-ethanesulfonic acid) at pH 7.4. After 10 minutes of preincubation at 37 ° C. in the presence of either buffer (control group) or test compound at different concentrations or 10 mM glycine (non-specific capture determination), 10 μM [14 C] glycine ( specific activity 112 mCi / mmol) are then added. Incubation is continued for 10 min at 37 ° C, and the reaction is stopped by 2 washes with Krebs-HEPES buffer pH 7.4. The radioactivity incorporated by the cells is then estimated after adding 100 μl of liquid scintillant and stirring for 1 h. Counting is performed on a Microbeta Tri-lux ™ counter. The effectiveness of the compound is determined by the IC50 concentration of the compound which decreases by 50% the specific uptake of glycine, defined by the difference in radioactivity incorporated by the control group and the batch which received glycine at 10 mM.

The compounds of the invention, in this test, have an Cl ₅₀ of the order of 0.001 to 10 μM.

Table 3 shows some examples of Cl ₅₀ results for compounds according to the invention.

TABLE 3

The results of the tests carried out on the chiral compounds of the invention and their racemates in the general formula (I) in which R ₂ represents in particular one or more halogen atoms or trifluoromethyl groups show that they are inhibitors of the carrier of the glycine glyti present in the brain.

These results suggest that the compounds of the invention can be used for the treatment of cognitive and / or behavioral disorders associated with neurodegenerative diseases, dementia; for the treatment of psychoses, in particular schizophrenia (deficient form and productive form), acute or chronic extrapyramidal symptoms induced by neuroleptics; for the treatment of various forms of anxiety, panic attacks, phobias, obsessive-compulsive disorders; for the treatment of various forms of depression, including psychotic depression; for the treatment of bipolar disorders, manic disorders, mood disorders; for the treatment of disorders due to alcohol abuse or withdrawal, sexual behavior disorders, eating disorders, migraine; pain ; sleep disorders.

The compounds according to the invention can therefore be used for the preparation of medicaments, in particular inhibitory inhibitory drugs of the glycine glycine transporter.

Thus, according to another of its aspects, the invention relates to medicaments which comprise a compound of formula (I), or an addition salt thereof to a pharmaceutically acceptable acid or a hydrate or a solvate of the compound of formula (I).

The present invention also relates to pharmaceutical compositions containing an effective dose of at least one compound according to the invention, in the form of a base or a pharmaceutically acceptable salt or solvate, and in a mixture, where appropriate, with suitable excipients.

Said excipients are chosen according to the pharmaceutical form and the desired mode of administration.

The pharmaceutical compositions according to the invention can thus be intended for oral, sublingual, subcutaneous, intramuscular, intravenous, topical, intratracheal, intranasal, transdermal, rectal, intraocular administration. The unit dosage forms may be, for example, tablets, capsules, granules, powders, oral or injectable solutions or suspensions, transdermal patches, suppositories. For topical administration we can consider ointments, lotions and eye drops.

Said unit forms are dosed to allow a daily administration of 0.01 to 20 mg of active ingredient per kg of body weight, according to the dosage form. In order to prepare tablets, a pharmaceutical carrier which may be composed of diluents, for example lactose, microcrystalline cellulose or starch, and formulation adjuvants such as binders, polyvinylpyrrolidone, is added to the active ingredient, which may or may not be micronized. hydroxy-propylmethylcellulose, etc.), flow agents such as silica, lubricants such as magnesium stearate, stearic acid, glycerol tribehenate, sodium stearyl fumarate. Wetting agents or surfactants such as sodium lauryl sulphate may also be added. The production techniques can be direct compression, dry granulation, wet granulation or hot melt.

The tablets may be bare, sugar-coated, for example with sucrose, or coated with various polymers or other suitable materials. They can be designed to allow rapid, delayed or prolonged release of the active ingredient through polymer matrices or specific polymers used in the coating. To prepare capsules the active ingredient is mixed with dry pharmaceutical vehicles (simple mixing, dry or wet granulation, or hot melting), liquid or semi-solid. The capsules may be hard or soft, film-coated or not, so as to have a rapid, prolonged or delayed activity (for example for an enteric form). A composition in the form of syrup or elixir or for administration in the form of drops may contain the active ingredient together with a sweetener, preferably acaloric, methylparaben or propylparaben as antiseptic, a flavoring agent and a dye.

Water-dispersible powders and granules may contain the active ingredient in admixture with dispersing agents or wetting agents, or dispersing agents such as polyvinylpyrrolidone, as well as with sweeteners and taste-correcting agents. For rectal administration, suppositories prepared with binders are used melting at the rectal temperature, for example cocoa butter or polyethylene glycols.

For parenteral administration, aqueous suspensions, isotonic saline solutions or sterile injectable solutions containing pharmacologically compatible dispersing agents and / or wetting agents, for example propylene glycol or butylene glycol, are used.

The active ingredient may also be formulated in the form of microcapsules, optionally with one or more supports or additives, or with a polymer matrix or with a cyclodextrin (transdermal patches, sustained-release forms).

The topical compositions according to the invention comprise a medium compatible with the skin. They may be in the form of aqueous, alcoholic or aqueous-alcoholic solutions, gels, water-in-oil or oil-in-water emulsions having the appearance of a cream or gel, microemulsions, aerosols, or in the form of vesicular dispersions containing ionic and / or nonionic lipids. These galenic forms are prepared according to the usual methods of the fields considered.

By way of example, a unitary form of administration of a compound according to the invention in tablet form may comprise the following components:

Compound according to the invention 50.0 mg

Mannitol 223.75 mg

Croscaramellose sodium 6.0 mg Corn starch 15.0 mg

Hydroxypropyl methylcellulose 2.25 mg

Magnesium stearate 3.0 mg

Orally, the dose of active ingredient administered per day can reach 0.1 to 20 mg / kg, in one or more doses.

There may be special cases where higher or lower dosages are appropriate; such dosages are not outside the scope of the invention. According to the usual practice, the dosage appropriate to each patient is determined by the physician according to the mode of administration, the weight and the response of said patient. The present invention, according to another of its aspects, also relates to a method of treatment of the pathologies indicated above which comprises the administration to a patient of an effective dose of a compound according to the invention, or one of pharmaceutically acceptable salts thereof.

Claims

1. Compound of general formula (I)

R represents a hydrogen atom or a group chosen from the (C ₆ -C ₆ ) alkyl, (C ₃ -C ₇ ) -cycloalkyl groups, these groups optionally substituted with one or more groups chosen independently from one of the groups other of the fluorine atom, (C ₃ -C ₇ ) -cycloalkyl, (C ₂ -C ₄ ) alkenyl, phenyl, (C ₁ -C ₆ ) alkoxy, hydroxy; the phenyl group is optionally substituted with one or more (d-C ₆ ) alkoxy groups;

R 1 represents a phenyl or naphthyl group, optionally substituted by one or more substituents chosen independently of one another from halogen atoms, (C ₁ -C ₆ ) alkyl, (C ₁ -C ₆ ) alkoxy groups, halo (CrC ₆₎ alkyl, NR ₄ R _5, NR ₃ C (O) OR _4, NR ₃ SO ₂ R _4, NR ₃ C (O) R _6, hydroxy, halo (C _r C ₆₎ alkoxy, (C ₁ -C ₆ ) alkyl-thio, (C ₁ -C ₆ ) alkyl-SO ₂ , phenyl or heteroaryl, the phenyl group being optionally substituted by one or more substituents independently selected from halogen atoms, the groups (C ₁ -C ₆ ) C ₆ ) alkyl, (C ₁ -C ₆ ) alkoxy, halo- (C ₁ -C ₆ ) alkyl, NR ₄ R ₅ , NR ₃ C (O) OR ₄ , NR ₃ SO ₂ R ₄ , NR ₃ C (O) R ₆ , hydroxy, halo- (C _r C ₆ ) alkoxy, (C _r C ₆ ) alkyl-thio, (dC ₆ ) alkyl-SO ₂ , the heteroaryl group being optionally substituted with one or more substituents independently selected from halogen atoms (dC ₆ ) alkyl, (dC ₆ ) alkoxy, halo (dC ₆ ) alkyl or NR ₄ R _{5 groups} ;

R ₂ represents one or more substituents chosen from a hydrogen atom, halogen atoms, (C ₆ -C ₆ ) alkyl, (C ₃ -C ₇ ) cycloalkyl, (C ₃ -C ₇ ) -cycloalkyl groups; (dC ₃ ) alkyl, halo (dC ₆ ) alkyl, (dC ₆ ) alkoxy, NR ₄ R ₅ , phenyl, heteroaryl, cyano, acetyl, (dC ₆ ) thioalkyl, (dC ₆ ) alkylsulfonyl, carboxy or (dC ₆₎ alkoxycarbonyl; the phenyl group being optionally substituted by one or more substituents independently selected from halogen atoms, groups (dC ₆₎ alkyl, (dC ₆₎ alkoxy, halo- (C _r _C6) alkyl, NR ₄ R ₅ , NR ₃ C (O) OR ₄ , NR ₃ SO ₂ R ₄ , NR ₃ C (O) R ₆ , hydroxy, halo (dC ₆ ) alkoxy, (dC ₆ ) alkyl-thio, (dC ₆ ) alkyl- SO ₂ ; the heteroaryl group being optionally substituted with one or more substituents independently selected from halogen atoms, (C ₁ -C ₆ ) alkyl, (C ₁ -C ₆ ) alkoxy, halo (C 1 -C ₆ ) alkyl, NR ₄ R ₅ ;

- R ₆ represents a group (C ₁ -C ₆ ) alkyl;

R ₄ and R ₅ may together form, with the nitrogen atom which bears them, a ring chosen from the azetidine, pyrrolidine, piperidine, morpholine, thiomorpholine, piperazine and azepine rings, optionally substituted by a (Ci-C) group; ₆ ) alkyl; - R ₃ and R ₄ can form together with the atoms that carry them, a 5- or 6-membered ring;

2. Compound of general formula (I) according to claim 1, characterized in that R represents a hydrogen atom or a (dC ₆ ) alkyl group, optionally substituted with one or more groups chosen independently of one another from the fluorine atom, (C ₂ -C ₄ ) alkenyl, hydroxy, (C ₃ -C ₇ ) -cycloalkyl or phenyl.

3. Compound of general formula (I) according to claim 1 or 2, characterized in that R 1 represents a phenyl or naphthyl group, optionally substituted by one or more halogen atoms or groups (dC ₆ ) -alkyl, (dC ₆ ) alkoxy, halo- (d-C ₆ ) alkyl, NR ₄ R ₅ or hydroxy.

4. Compound of general formula (I) according to any one of claims 1 to 3, characterized in that R ₂ represents one or more substituents chosen from a hydrogen atom, halogen atoms, NR ₄ groups. R _5, (dC ₆₎ alkoxy, halo- (dC ₆₎ alkyl, (C _r C ₆₎ alkyl-thio, (C _r C ₆₎ alkyl-SO _2.

5. Compound of general formula (I) according to any one of claims 1 to 4, characterized in that:

- R represents a hydrogen atom or a methyl, ethyl, propyl, / sobutyl, allyl group, the methyl, ethyl, / sobutyl group (s) being optionally substituted with one or more groups independently selected from fluorine, hydroxy, cyclopropyl or phenyl;

R 1 represents a phenyl or naphthyl group, optionally substituted by one or more halogen atoms or methyl, methoxy, trifluoromethyl, NH ₂ or hydroxyl groups;

- R ₂ represents one or more substituents chosen from hydrogen, halogen atoms, methyl, ethyl, NH ₂ , methoxy, trifluoromethyl, methanesulfanyl, ethanesulfonyl, and their addition salts with an acid.

6. Compound according to any one of claims 1 to 5, characterized in that it is chosen from:

N - [(4-Amino-phenyl) - (2-azabicyclo [2.1.1] hex-1-yl) -methyl] - (2-chloro-3-trifluoromethyl) -benzamide and its hydrochloride; N - [(2-Azabicyclo [2.1.1] hex-1-yl) -m-tolyl-methyl] - (2-chloro-3-trifluoromethyl) -benzamide and its hydrochloride;

N - [(2-Aza-bicyclo [2.1.1] hex-1-yl) - (3-trifluoromethyl-phenyl) -methyl] - (2-chloro-3-trifluoromethyl) -benzamide and its hydrochloride;

N - [(2-Azabicyclo [2.1.1] hex-1-yl) -phenylmethyl] - (2-chloro-3-trifluoromethyl) benzamide;

2-Amino-N - [(2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (5-bromo-4-chloro) -benzamide; N - [(2-Aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-methyl-3-trifluoromethyl) benzamide;

N - [(2-Azabicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2,6-dichloro-3-trifluoromethyl) benzamide;

N - [(2-Azabicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-chloro-5-trifluoromethyl) benzamide; and its hydrochloride;

N - [(2-Azabicyclo [2.1.1] hex-1-yl) -phenylmethyl] - (2-chloro-6-fluoro-3-methyl) benzamide;

N - [(2-Azabicyclo [2.1.1] hex-1-yl) -phenylmethyl] - (2-chloro-5-methylsulfanyl) benzamide; N - [(2-Aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-chloro-3-methyl) -benzamide and its hydrochloride;

(-) N - [(2-Aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-chloro-3-trifluoromethyl) -benzamide and its hydrochloride; (+) - [(2-Aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-chloro-3-trifluoromethyl) benzamide and its hydrochloride;

N - [(2-Aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (4-chloro-5-ethanesulfonyl-2-methoxy) -benzamide and its hydrochloride;

N - [(2-Azabicyclo [2.1.1] hex-1-yl) - (4-fluoro-phenyl) -methyl] - (2-chloro-3-trifluoromethyl) -benzamide;

2-chloro-β- {phenyl- [2-methyl-2-aza-bicyclo [2.1.1] hex-1-yl] -methyl} - (3-trifluoromethylbenzamide) and its hydrochloride; 2-chloro-N - [(2-ethyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (3-trifluoromethyl) benzamide and its hydrochloride;

N - [(2-Allyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-amino-5-bromo-4-chloro) -benzamide;

(2-Amino-5-bromo-4-chloro) -N- [phenyl- (2-propyl-2-aza-bicyclo [2.1.1] hex-1-yl) -methyl] -benzamide and its hydrochloride;

2,6-dichloro-Λ / - {phenyl- [2- (2,2,2-trifluoro-ethyl) -2-aza-bicyclo [2.1.1] hex-1-yl] -methyl} -

(3-trifluoromethyl) benzamide; N - [(2-Azabicyclo [2.1.1] hex-1-yl) - (3-hydroxy-phenyl) -methyl] - (2-chloro-3-trifluoromethyl) -benzamide and its hydrochloride;

2-Chloro-N - [(2-cyclopropylmethyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (3-trifluoromethyl) -benzamide and its hydrochloride: f +; 2- Chloro-N - [(2-ethyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (3-trifluoromethyl) -benzamide and its hydrochloride;

N - [(2-Aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2,6-dimethyl) -benzamide and its hydrochloride;

N - [(2-Azabicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-ethyl) -benzamide and its hydrochloride; N - [(2-Azabicyclo [2.1.1] hex-1-yl) -m-tolyl-methyl] - (2,6-dichloro-3-trifluoromethyl) -benzamide and its hydrochloride;

N - [(2-Ethyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2,6-dimethyl) -benzamide and its hydrochloride; 2-ethyl-N - [(2-ethyl-2-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] -benzamide and its hydrochloride;

N - [(2-Aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (6-chloro-2-methyl-3-trifluoromethyl) benzamide and its hydrochloride;

N - [(2-Benzyl-aza-bicyclo [2.1.1] hex-1-yl) -phenyl-methyl] - (2-chloro-3-trifluoromethyl) -benzamide and its hydrochloride.

7. Process for the preparation of a compound of general formula (I) according to claim 1, characterized in that a compound of general formula (II)

in which R and R ₁ are as defined in claim 1, reacts with a compound of general formula (III)

wherein Y is an activated OH group or a chlorine atom and R ₂ is as defined in claim 1.

8. Medicament, characterized in that it comprises a compound of formula (I) according to any one of claims 1 to 6, or a salt of addition of this compound to a pharmaceutically acceptable acid.

9. Pharmaceutical composition, characterized in that it comprises a compound of formula (I) according to any one of claims 1 to 6, or a pharmaceutically acceptable salt thereof, and at least one pharmaceutically acceptable excipient.

10. Use of a compound of formula (I) according to any one of claims 1 to 6 for the preparation of a medicament for the treatment of cognitive and / or behavioral disorders associated with neurodegenerative diseases; to madness.

11. Use of a compound of formula (I) according to any one of claims 1 to 6 for the preparation of a medicament for the treatment of psychoses, schizophrenia (deficient form and productive form), acute extrapyramidal symptoms or chronic induced by neuroleptics.

12. Use of a compound of formula (I) according to any one of claims 1 to 6 for the preparation of a medicament for treatment for the treatment of various forms of anxiety, panic attacks, phobias, obsessive compulsive disorder.

13. Use of a compound of formula (I) according to any one of claims 1 to 6 for the preparation of a medicament for the treatment of various forms of depression, including psychotic depression; for the treatment of bipolar disorders, manic disorders, mood disorders; for the treatment of disorders due to alcohol abuse or withdrawal, sexual behavior disorders, eating disorders, migraine.

14. Use of a compound of formula (I) according to any one of claims 1 to 6 for the preparation of a medicament for the treatment of pain.

15. Use of a compound of formula (I) according to any one of claims 1 to 6 for the preparation of a medicament for the treatment of sleep disorders.

16. A compound according to any one of claims 1 to 6 for the treatment of cognitive and / or behavioral disorders associated with neurodegenerative diseases; to madness.

17. Compound according to any one of claims 1 to 6, for the treatment of psychoses, schizophrenia (deficient form and productive form), acute or chronic extrapyramidal symptoms induced by neuroleptics.

18. A compound according to any one of claims 1 to 6 for the treatment of various forms of anxiety, panic attacks, phobias, obsessive-compulsive disorders.

19. A compound according to any one of claims 1 to 6 for the treatment of various forms of depression, including psychotic depression; for the treatment of bipolar disorders, manic disorders, mood disorders; for the treatment of disorders due to alcohol abuse or withdrawal, sexual behavior disorders, eating disorders, migraine.

20. A compound according to any one of claims 1 to 6 for the treatment of pain.

21. A compound according to any one of claims 1 to 6 for the treatment of sleep disorders.