作者:Robert E. Maleczka,、Feng Geng
DOI:10.1021/ol990912+
日期:1999.10.1
[formula: see text] The Wittig rearrangements of alpha-alkoxysilanes, promoted by the action of methyllithium were studied. Depending on both the substrate and reaction conditions employed, [2,3]-, [1,2]-, or [1,4]-Wittig rearrangements can be realized. These rearrangements were shown to be initiated by either Si/Li exchange or deprotonation alpha to the silane. Furthermore the sigmatropic shifts can
[式:见正文]研究了由甲基锂作用促进的α-烷氧基硅烷的维蒂希重排。取决于所用的底物和反应条件,可以实现[2,3]-,[1,2]-或[1,4] -Wittig重排。已表明这些重排是通过Si / Li交换或硅烷的去质子化α引发的。此外,σ位移通常可以跟随其他合成有用的原位化学事件。