A New Synthesis and Stereocontrolled Functionalization of Substituted Silacyclopent-3-enes
作者:Yannick Landais、Cédrick Mahieux、Kurt Schenk、Sheetal S. Surange
DOI:10.1021/jo026774a
日期:2003.4.1
C2-Substituted silacyclopent-3-enes have been prepared in good yields in two steps starting from commercially available diallylsilane 9. Coupling between carbanion of 9 and aldehydes or epoxides followed by ring-closing metathesis of the corresponding substituted diallylsilanes led to various silacyclopent-3-enes having a beta- or a gamma-hydroxysilane moiety. Dihydroxylation and epoxidation of the
从市售的二烯丙基硅烷9开始,分两个步骤以高收率制备了C2-取代的硅杂环戊-3-烯。9的碳负离子与醛或环氧化物偶联后,相应的取代的二烯丙基硅烷进行闭环复分解反应,从而生成各种silacyclopent-3具有β-或γ-羟基硅烷部分的-烯。然后,硅烷基环的二羟基化和环氧化选择性地导致了多羟基化的硅烷基环戊烷。这些过程显示出相反的话题性,为具有多达五个连续立体中心的非对映异构多元醇提供了互补和立体控制的途径。