Synthesis of γ-Monofluorinated Goniothalamin Analogues via Regio- and Stereoselective Ring-Opening Hydrofluorination of Epoxide
作者:Jun-Ling Chen、Feng Zheng、Yangen Huang、Feng-Ling Qing
DOI:10.1021/jo200611w
日期:2011.8.19
A stereoselective synthesis of the biologically interesting γ-monofluorinated goniothalamin analogue 2a was described. The features of the synthesis included regioselective reduction of the unprotected hydroxypropynyl moiety of compound 10 by Red-Al, asymmetric Sharpless epoxidation of allyl alcohol 11, and regio- and stereoselective ring-opening hydrofluorination of the hydroxypropynyl epoxide 14
描述了一种具有生物学意义的γ-单氟化鸟硫胺素类似物2a的立体选择性合成。合成的特征包括通过Red-Al选择性还原化合物10中未保护的羟基丙炔基部分,烯丙醇11的不对称Sharpless环氧化,以及在Et 3 N·3HF中对羟基丙炔基环氧化合物14的区域和立体选择性开环氢氟化反应。高ee和博士 手性羟基丙炔基氟代醇15用作制备一系列γ-单氟化α,β-不饱和δ-内酯的有价值的组成部分。