New aminopiperazine derivatives

摘要

This invention relates to new aminopiperazine derivatives having the potentiation of the cholinergic activity and represented by the general formula [I]: <IMAGE> [I] wherein R1 is lower alkyl, aryl, ar(lower)alkoxy or a heterocyclic group, each of which may be substituted with halogen, R2 is hydrogen or lower alkyl, R3 is cyclo(lower)alkyl, aryl or ar(lower)-alkyl, each of which may be substituted with halogen, A is <IMAGE> or lower alkylene, and Y is <IMAGE> and pharmaceutically acceptable salts thereof, to processes for the preparation thereof and to a pharmaceutical composition comprising the same.