Patent ID: 8772316

Claim:
A compound of Formula (I) a pharmaceutically acceptable salt or a tautomer form thereof; wherein: R 1 is a (C 1 -C 4 )alkyl group optionally substituted with a —(C 1 -C 4 )alkoxy or a R a NH group, R a being selected from the group consisting of (C 1 -C 4 )alkyl-C(═O)— and (C 1 -C 4 )alkyl-S(═O) 2 —; R 2 is a hydrogen atom; R 3 and R 4 independently represent a (C 1 -C 3 )alkyl group; R 5 is a hydrogen atom; R 6 and R 7 independently represent a hydrogen atom, a halogen atom, or R 6 and R 7 together with the carbon atom to which they are shown attached form a —C(═O)— group; R′ is —NH 2 or —OR, wherein R is a hydrogen atom, a (C 1 -C 3 )alkyl group or a (C 1 -C 3 )alkyl-C(═O)— group Ar is an aryl or heteroaryl group optionally substituted with one to four substituents independently selected from the group consisting of halogen, azido, hydroxy, (C 1 -C 4 )alkyl, (C 1 -C 4 )alkoxy, —O—(C 1 -C 4 )alkyl-(C 1 -C 6 )cycloalkyl, aryl, (C 1 -C 4 )alkyl-aryl-, (C 1 -C 4 )alkoxy-aryl-, amino-substituted aryl, N((C 1 -C 4 )alkyl) 2 -substituted aryl, aryloxy, heteroaryl, (C 1 -C 4 )alkyl-heteroaryl-, and R b R c N, or wherein two substituents at adjacent positions of the aryl or heteroaryl together with the atoms to which they are attached form a heterocyclic ring; and R b and R c , are independently selected from the group consisting of hydrogen, (C 1 -C 4 )alkyl, halogeno(C 1 -C 4 )alkyl-, (C 1 -C 4 )alkoxy(C 1 -C 4 )alkyl-, aryl(C 1 -C 4 )alkyl- and acetylamino(C 1 -C 4 )alkyl-.