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.
报道了一种使用三乙基膦酰基乙酸酯和碱对手性环氧化合物进行对映和非对映选择性环丙烷化的高效高产改良方法(Wadsworth-Emmons环丙烷化)。该协议的实用性通过简明而实用的合成卡斯卡利酸来说明,格林纳丁胺 L-(-)-CCG-II,一种含环丙烷的天然产物。