A compound of the formula: ##STR1## (wherein R is --SO.sub.2 R.sup.1 or --CONHR.sup.2 ; R.sup.1 is C.sub.1 -C.sub.5 alkyl, C.sub.8 -C.sub.12 phenylalkenyl, amino, dimethylamino, optionally substituted C.sub.8 -C.sub.12 aryl, or 5- or 6-membered heterocyclic group including at least one hetero atom selected from the group consisting of N, S, and O; R.sup.2 is amino, C.sub.1 -C.sub.8 alkylamino, C.sub.1 -C.sub.8 alkyl, or optionally substituted C.sub.8 -C.sub.12 aryl) or its pharmaceutically acceptable acid-addition salt, being useful as a drug for senile dementia, psychotropic, or antiamnesia agent is provided through several routes.
该化合物的结构式为:##STR1##(其中R为--SO.sub.2 R.sup.1或--CONHR.sup.2;R.sup.1为C.sub.1-C.sub.5烷基,C.sub.8-C.sub.12苯基烯基,
氨基,
二甲胺基,可选择取代的C.sub.8-C.sub.12芳基,或包含至少一种异原子(选自N、S和O)的5-或6元杂环基;R.sup.2为
氨基,C.sub.1-C.sub.8烷基
氨基,C.sub.1-C.sub.8烷基,或可选择取代的C.sub.8-C.sub.12芳基)或其药用可接受的酸盐,可用作治疗老年性痴呆症、精神药物或抗遗忘剂的药物,通过多种途径提供。