New spiro-benzopyran-thiazolidine derivs. and related cpds.

摘要

Thiazolidine derivs. of formula (I) and their salts are new. X =CH2, O or S; R1 = halogen and R2 = H, NO2, CN, OR3 or NHR3, or R1 = R2 = H or NO2; R3 = H, alkyl, acyl, COOR4 or CONHR4; R4 = alkyl, aryl or aralkyl.