Stereochemicalaspect of asymmetric Ag-catalyzed Hosomi-Sakurai reaction with ketones has been investigated. Several allyltrimethoxysilanes have been synthesized and used for the asymmetric reaction. Remarkably, among several possible diastereomers only two are generated with high levels of diastereo- and enantioselectivities. Based on the observations for different allyltimethoxysilanes, we hypothesize
已经研究了不对称 Ag 催化的 Hosomi-Sakurai 与酮反应的立体化学方面。已经合成了几种烯丙基三甲氧基硅烷并用于不对称反应。值得注意的是,在几种可能的非对映异构体中,只有两种具有高水平的非对映选择性和对映选择性。基于对不同烯丙基二甲氧基硅烷的观察,我们假设形成单一烯丙基银物质,该物质与酮发生加成。
Effect of substituent on reactions remote from silicon: regioselective .alpha.-alkylation of .alpha.-silylallyl carbanions
作者:Raymond F. Horvath、Tak Hang Chan
DOI:10.1021/jo00263a012
日期:1989.1
HORVATH, RAYMOND F.;CHAN, TAK HANG, J. ORG. CHEM., 54,(1989) N, C. 317-327