Chiral derivatives of Hibiscus acid bearing lactone ring moiety, process for preparing the same and a convenient method for the large-scale isolation of Hibiscus acid

摘要

The present invention relates to a novel chiral compound of Hibiscus acid bearing lactone moiety of formula I,Wherein:R1=R2=alkali salt of carboxylic acid or acid chloride or lower esters or the N-substituted cyclic imides.R3=hydroxyl or protected hydroxyl group and a process for preparing the same.