Patent ID: 7078521

Claim:
A process for the preparation of formula (I) or its salt where: R is selected from the group consisting of H, Cl, Br, F, I, C 1 –C 4 alkoxy, C 1 –C 4 alkylthio, C 1 –C 4 alkyl, C 5 –C 6 cycloalkyl; R1 is selected from the group consisting of dialkylamine, 4-alkyl-1-piperazinyl group, 4-hydroxyalkyl-1-piperidinyl group, 1-imidazolyl group, 4-alkyl-1-piperidinyl group; R2 is selected from the group consisting of hydrogen, a C 1 –C 4 alkoxy group, and a C 1 –C 4 alkylthio group, by transforming a pyrrolobenzothiazepinone, substituted with the groups R and R2, into the formula (I) compound to the corresponding enamine, and optional salifying the compound with an acid.