Stereocontrolled Synthesis of <i>gem</i>-Difluoromethylenated Goniodiols and Goniothalamin Epoxides Based on Ring-Closing Metathesis
作者:Zheng-Wei You、Xingang Zhang、Feng-Ling Qing
DOI:10.1055/s-2006-942467
日期:2006.8
An efficient and general method to stereoselectively synthesize gem-difluoromethylenated goniodiols and goniothalamin epoxides has been developed. The introduction of a gem-difluoromethyl-containing group was achieved by the reaction of aldehydes with 3-bromo-3,3-difluoropropene in the presence of indium. The gem-difluoromethylenated α,β-unsaturated-8-lactone moiety was constructed through the ring-closing
开发了一种高效且通用的立体选择性合成偕二氟亚甲基龙骨二醇和龙骨胺环氧化物的方法。通过醛与 3-溴-3,3-二氟丙烯在铟存在下的反应实现了含偕二氟甲基的基团的引入。偕二氟亚甲基化的α,β-不饱和-8-内酯部分是通过Grubbs'II催化剂在甲苯中回流下对高度缺电子的偕二氟亚甲基丙烯酰基酯进行闭环复分解而构建的。