Selective formation of alkenes from trimethylsilylmethyl ketones and from acylsilanes
作者:Alois Fu¨rstner、Gerlinde Kollegger、Hans Weidmann
DOI:10.1016/0022-328x(91)86327-m
日期:1991.8
Trimethylsilylmethyl ketones, readily from acyl chlorides, undergo a Reformatsky—Peterson reaction sequence to give 3-alkenoates regioselectivity. Acylsilanes, however, react with either zinc ester enolates or trimethylsilymethylmagnesium chloride to give the corresponding tertiary alcohols which, depending on their structure, spontaneously undergo either elimination or a Brook rearrangement—Peterson
容易得自酰氯的三甲基甲硅烷基甲基酮经过Reformatsky-Peterson反应序列产生3-链烯酸酯区域选择性。但是,酰基硅烷会与烯醇锌酸锌或三甲基甲硅烷基甲基氯化镁反应生成相应的叔醇,根据其结构,叔醇会自发地进行消除或布鲁克重排-彼得森烯化序列。这些反应允许选择性地形成乙烯基硅烷。