Concise Synthesis of 1,3-Diacetoxy-2-[2′-(2′′,4′′-difluorophenyl)prop-2′-en-1′-yl]propane: An Intermediate for Posaconazole
作者:Yunxiang Chen、Yangwei Huang、Xueqing Zhao、Zhongming Li
DOI:10.1080/00397911.2014.929147
日期:2015.3.19
A concise process of 1,3-diacetoxy-2-[2-(2,4-difluorophenyl)prop-2-en-1-yl]propane has been developed. Diethyl malonate was C-alkylated with 2,3-dichloropropene and then the ester groups were reduced by LiAlH4, followed by acylation to provide 2-(2-chloroprop-2-en-1-yl)-1,3-diacetoxypropane. The chloropropene was finally coupled with 2,4-difluorophenylmagnesium bromide and catalyzed by Fe(acac)(3) to afford the title compound in good total yield.