Remote Central-to-Axial Chirality Conversion: Direct Atroposelective Ester to Biaryl Transformation
作者:Achim Link、Christof Sparr
DOI:10.1002/anie.201803472
日期:2018.6.11
A strategy for the remote central‐to‐axial chirality conversion by simultaneous planarization of an encoding and a transient stereocenter is presented. Based on a diastereoselective double addition of a chiral 1,5‐bifunctional organomagnesium alkoxide reagent to a broad range of aryl ester substrates, axially chiral biaryls are directly obtained upon in situ reduction. Various structurally distinct
提出了一种通过同时平面化编码和瞬态立体中心进行远程中心轴手性转换的策略。基于将手性1,5-双官能有机镁醇盐试剂非对映选择性地双键添加到各种芳基酯底物上,可在原位还原后直接获得轴向手性联芳基。一步就可以得到用作有价值的手性联芳基阴离子替代物的各种结构不同的阻转异构联芳基硅烷,其er值最高为98:2。