Stereoselective Olefin Isomerization Leading to Asymmetric Quaternary Carbon Construction
作者:Kan Wang、Christopher J. Bungard、Scott G. Nelson
DOI:10.1021/ol0706511
日期:2007.6.1
stereoselective Ir(I)-catalyzed isomerization of 1,1-disubstituted and trisubstituted allylic ethers and in situ [3,3] sigmatropic rearrangement of the resulting allyl vinyl ethers provide for the highly stereoselective construction of quaternary carbon stereocenters. The olefin isomerization-Claisen rearrangement (ICR) sequence allows adjacent quaternary-tertiary stereocenter relationships to be established with
1,1-二取代和三取代的烯丙基醚的化学和立体选择性Ir(I)催化异构化以及所得的烯丙基乙烯基醚的原位[3,3]σ重排提供了季碳立体中心的高度立体选择性。烯烃异构化-克莱森重排(ICR)序列允许以优异的非对映异构建立相邻的四级-三级立体中心关系。对映选择性季碳合成的几种补充策略直接来自ICR反应设计。