Asymmetric synthesis of cyclic β-hydroxyallylsilanes via sequential allyltitanation-ring closing metathesis
作者:Jean-Michel Adam、Laurence de Fays、Michel Laguerre、Léon Ghosez
DOI:10.1016/j.tet.2004.05.058
日期:2004.8
Highly enantioenriched cyclic β-hydroxyallylsilanes have been prepared via enantioselective allylation of unsaturated aldehydes using a chiral allyltitanium reagent, followed by a ring-closing metathesis. Functionalized rings of various sizes have been synthesized and the electronic effect of the silicon group in the RCM reaction has been studied. The resulting cyclic β-hydroxyallylsilanes reacted
通过使用手性烯丙基钛试剂对不饱和醛进行对映选择性烯丙基化,然后进行闭环易位,已经制备了高度对映体富集的环状β-羟基烯丙基硅烷。合成了各种尺寸的官能化环,并研究了RCM反应中硅基团的电子效应。所得的环状β-羟基烯丙基硅烷与多种亲电试剂立体选择性地反应。报道了该方法在高度官能化的二氢吡喃的合成中的首次应用。