UN PROCEDIMIENTO PARA PREPARAR DERIVADOS DE OXOTIAZOLIDINA

摘要

This invention provides a oxothiazolidine compound of the formula: wherein R1 is acyl; di(lower)alkylamino(lower)alkylcarbamoyl(lower)alkyl; arylcarbamoyl(lower)alkyl; ar(lower)alkylcarbamoyl(lower)alkyl; heterocyclic carbamoyl(lower)alkyl; heterocyclic(lower)alkylcarbamoyl(lower)alkyl; thiazolidinylcarbonyl(lower)alkyl; morpholinylcarbonyl(lower)alkyl or a group of the formula: in which A is lower alkylene; n is an integer of 0 or 1; m is an integer of 2 or 3; X is -N-, or -CH- and R2 is hydroxy; lower alkyl which may have hydroxy; ar(lower)alkyl which may have halogen; arylthio which may have halogen; acyl or heterocyclic group and Y is -S-, or pharmaceutically acceptable salt thereof. This compound is useful as cognition activator. This invention further provides processes for the preparation of this compound and pharmaceutical composition comprising compound of the above formula.