Rhodium-Catalyzed Asymmetric Synthesis of Silicon-Stereogenic Dibenzosiloles by Enantioselective [2+2+2] Cycloaddition
作者:Ryo Shintani、Chihiro Takagi、Tomoaki Ito、Masanobu Naito、Kyoko Nozaki
DOI:10.1002/anie.201409733
日期:2015.1.26
A rhodium‐catalyzed asymmetric synthesis of silicon‐stereogenic dibenzosiloles has been developed through a [2+2+2] cycloaddition of silicon‐containing prochiral triynes with internal alkynes. High yields and enantioselectivities have been achieved by employing an axially chiral monophosphine ligand, and the present catalysis is also applicable to the asymmetric synthesis of a germanium‐stereogenic
通过含硅的前手性三炔与内部炔的[2 + 2 + 2]环加成反应,已经开发出了铑催化的硅立体异构二苯并甲硅烷的不对称合成方法。通过使用轴向手性单膦配体已经实现了高收率和对映选择性,本发明的催化方法也适用于锗立体异构二苯并germole的不对称合成。还描述了对这些化合物的光学性质的初步研究。