Thienopyrimidine derivatives, processes for the preparation thereof and therapeutic uses thereof

1. A process for preparing a compound of formula (I), or a pharmaceutically acceptable salt thereof:

wherein:

R6 is —CONH 2 or a —C(R α )(R β )(OH) group in which R α and R β are both a hydrogen atom or R α and R β are identical and are a (C 1 -C 6 ) alkyl group;

R is a phenyl or heteroaryl group substituted with R1, R′ 1, R2 and R3;

R1 is a hydrogen atom or is selected from the group consisting of (C 1 -C 6 )alkyl, (C 1 -C 6 )alkoxy, (C 3 -C 7 )cycloalkyl and aryl, wherein the (C 1 -C 6 )alkyl, (C 1 -C 6 )alkoxy, (C 3 -C 7 )cycloalkyl or aryl is optionally substituted with one or several substituents selected, independently in each instance, from the group consisting of amino, hydroxyl, thiol, halogen, (C 1 -C 6 )alkyl, (C 1 -C 6 )alkoxy, (C 1 -C 6 )alkylthio, (C 1 -C 6 )alkylamino, aryloxy, aryl(C 1 -C 6 )alkoxy, cyano, halo(C 1 -C 6 )alkyl, carboxyl and carboxy(C 1 -C 6 )alkyl;

R′ 1 is a hydrogen atom or a (C 1 -C 6 )alkoxy group;

R2 is selected from the group consisting of:

a hydrogen atom, a halogen atom, a (C 1 -C 6 )alkyl group, a (C 3 -C 7 )cycloalkyl group, a (C 1 -C 6 )alkoxy group;

a heterocycloalkyl group, a heterocycloalkyl-CH 2 — group, a heteroaryl group;

wherein the heterocycloalkyl group, the heterocycloalkyl-CH 2 — group or the heteroaryl group is optionally substituted with one or several substituents selected, independently in each instance, from the group consisting of (C 1 -C 6 )alkyl, (C 3 -C 7 )cycloalkyl, (C 1 -C 6 )alkoxy, heterocycloalkyl, carboxy(C 1 -C 6 )alkyl, NR4R5 and OR4;

wherein the (C 1 -C 6 )alkyl group is optionally substituted with a halogen atom, a (C 1 -C 6 )alkoxy group, a heterocycloalkyl group, an NH 2 group or an OH group; and

wherein R4 and R5 are each, independently of one another, a hydrogen atom, a (C 1 -C 6 )alkyl group or a heterocycloalkyl group;

or else R4 and R5 together form, with the nitrogen atom which bears them, a 4- to 7-membered ring; and

an NRaRb group, wherein Ra and Rb are, independently of one another:

a hydrogen atom;

a heterocycloalkyl group, wherein the heterocycloalkyl group is optionally substituted with a (C 1 -C 6 )alkyl group; or

a (C 1 -C 6 )alkyl group, wherein the (C 1 -C 6 )alkyl group is optionally substituted with an NR4R5 group;

wherein R4 and R5 are each, independently of one another, a hydrogen atom, a (C 1 -C 6 )alkyl group or a heterocycloalkyl group;

or else R4 and R5 together form, with the nitrogen atom which bears them, a 4- to 7-membered ring;

R3 is a hydrogen atom, a halogen atom or a (C 1 -C 6 )alkyl group;

wherein when R is a phenyl group, two adjacent substituents on the phenyl group may together form a heterocycloalkyl ring fused with the phenyl bearing them, wherein the heterocycloalkyl ring is optionally substituted with one or several substituents selected, independently in each instance, from the group consisting of an oxo group and a (C 1 -C 6 )alkyl group; and

R7 is an aryl group or a heteroaryl group, wherein the aryl group or the heteroaryl group is optionally substituted with one or several substituents selected, independently in each instance, from the group consisting of cyano, halogen, (C 1 -C 6 )alkyl, OR′4, CH 2 OH, CH 2 NH 2 , S(O) n R′4, R8 and OR8;

wherein:

R′4 is a hydrogen atom, a (C 1 -C 6 )alkyl group or an aryl group, wherein the (C 1 -C 6 )alkyl group or the aryl group is optionally substituted with a halogen atom, an NH 2 group or an OH group;

n is 1 or 2; and

R8 is a halo(C 1 -C 6 )alkyl group;

wherein each of the nitrogen atoms of the compound of formula (I), independently of one another, is optionally in N-oxide form,

the process comprising:

reacting a thienopyrimidine of formula (II):

wherein R7 is as defined above in formula (I);

n is 1 or 2;

and R16 is a (C 1 -C 6 )alkoxy group;

with a compound of formula (IIIb):

wherein R is as defined above in formula (I),

to produce a mixture; and

i) when R6 is CONH 2 , treating the mixture with an aqueous ammonia solution to obtain the compound of formula (I), or a pharmaceutically acceptable salt thereof, wherein R6 is —CONH 2 ; or

ii) when R6 is a —C(R α )(R β )(OH) group and R α and R β are hydrogen atoms, reducing the mixture obtained with a reducing agent in a solvent to obtain the compound of formula (I), or a pharmaceutically acceptable salt thereof, wherein R6 is a —C(R α )(R β )(OH) group and wherein R α and R β are hydrogen atoms; or

iii) when R6 is a —C(R α )(R β )(OH) group and R α and R β are identical and are a (C 1 -C 6 )alkyl group, treating the mixture with an excess of an organometallic derivative in a solvent to obtain the compound of formula (I), or a pharmaceutically acceptable salt thereof, wherein R6 is a —C(R α )(R β )(OH) group and wherein R α and R β are identical and are a (C 1 -C 6 )alkyl group.

2. The process of claim 1 , wherein the organometallic derivative is R α MgX or R β Li.