The present invention relates to thiadiazole derivatives having the formula: ##STR1## in which: R.sub.1 represents a phenyl group, non-substituted or substitued 1 to 3 times by a halogen atom, preferably chlorine or fluorine, or by a C.sub.1 -C.sub.4 alkyl group, preferably the methyl group, or by a C.sub.1 -C.sub.4 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; R.sub.2 represents hydrogen or a C.sub.1 -C.sub.4 alkyl group, R.sub.3 represents an alkylamino group or a heterocyclic group, Application: Drugs for treatment of notably senile dementia.
本发明涉及具有以下结构式的
噻二唑衍
生物:##STR1## 其中:R.sub.1代表苯基,未被取代或被卤原子取代1至3次,优选为
氯或
氟,或被C.sub.1 -C.sub.4烷基基团取代,优选为甲基,或被C.sub.1 -C.sub.4烷氧基基团取代,优选为甲氧基,或被羟基取代,或被三
氟甲基基团或同时被1至3个卤原子和1或2个甲基基团取代的苯基;R.sub.2代表氢或C.sub.1 -C.sub.4烷基基团,R.sub.3代表烷基
氨基基团或杂环基团,应用:用于治疗老年性痴呆症的药物。