Enantio- and diastereocontrolled conversion of chiral epoxides to trans-cyclopropane carboxylates: application to the synthesis of cascarillic acid, grenadamide and <scp>l</scp>-(−)-CCG-II
作者:Pradeep Kumar、Abhishek Dubey、Anand Harbindu
DOI:10.1039/c2ob25622c
日期:——
An efficient high yielding improved method for the enantio- and diastereoselective cyclopropanation of chiral epoxides using triethylphosphonoacetate and base (Wadsworth–Emmons cyclopropanation) is reported. The utility of this protocol is illustrated by concise and practical synthesis of cascarillic acid, grenadamide and L-(−)-CCG-II, a cyclopropane containing natural products.