DERIVATIVES OF 1,3,4-THIADIAZOLE, A METHOD OF OBTAINING THEM AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM

摘要

The present invention relates to thiadiazole derivatives having the formula: <IMAGE> (I) in which: R1 represents a phenyl group, non-substituted or substitued 1 to 3 times by a halogen atom, preferably chlorine or fluorine, or by a C1-C4 alkyl group, preferably the methyl group, or by a C1-C4 alkoxy group, preferably the methoxy group, or by a hydroxy group or by a trifluoromethyl group or a phenyl group substituted simultaneously by 1 to 3 halogen atoms and by 1 or 2 methyl groupings; R2 represents hydrogen or a C1-C4 alkyl group, R3 represents an alkylamino group or a heterocyclic group, Application: Drugs for treatment of notably senile dementia.