THIADIAZOLE DERIVATIVES ACTIVE ON THE CENTRAL NERVOUS SYSTEM,PROCESS FOR THEIR PREPARATION AND PHARMACEUTICAL COMPOSITIONS IN WHICH THEY ARE PRESENT

摘要

The invention relates to thiadiazole derivatives corresponding to the formula: (I) in which R represents: a linear or branched alkyl group having from 1 to 5 carbon atoms; a cycloalkyl group having 5 or 6 carbon atoms; a phenyl group optionally substituted by 1 or 2 halogen atoms, preferably chlorine, by 1 or 2 lower alkyl or lower alkoxy groups, by 1 or 2 hydroxyl groups or by a nitro or trifluoromethyl group; a biphenylyl group; or an alpha-naphthyl group; and the pharmaceutically acceptable salts of the said derivatives. It also relates to a process for the preparation of the said derivatives and the pharmaceutical compositions in which they are present. The said derivatives act on the central nervous system.