Selective Synthesis of Functionalized, Tertiary Silanes by Diastereoselective Rearrangement−Addition
作者:Barry M. Trost、Zachary T. Ball、Eun-Joo Kang
DOI:10.1021/ol0518636
日期:2005.10.1
see text] Treatment of hydroxy-substituted silyl epoxides with Grignard reagents induces a 1,2-carbon shift to reveal alpha-silyl aldehydes, which are trapped by highly diastereoselective addition reactions of the Grignard reagent. The starting epoxides are readily accessible from propargylic alcohols by regio- and diastereoselective hydrosilylation and epoxidation reactions. In addition to providing
[反应:见正文]用格氏试剂处理羟基取代的甲硅烷基环氧化物会导致1,2-碳转移,从而揭示出格氏试剂的高度非对映选择性加成反应所捕获的α-甲硅烷基醛。可以通过区域和非对映选择性氢化硅烷化和环氧化反应从炔丙醇中容易地获得起始环氧化物。除了提供官能化的叔硅烷产物之外,该方法还显示出通过化学和非对映选择性彼得森消除产物叔硅烷二醇而提供叔烯烃合成的方法。