Novel 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, chemistry chemdraw filechemistry mol file;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.