Iridium‐Catalyzed Chemo‐, Diastereo‐, and Enantioselective Allyl‐Allyl Coupling: Accessing All Four Stereoisomers of (
<i>E</i>
)‐1‐Boryl‐Substituted 1,5‐Dienes by Chirality Pairing
作者:Yongsuk Jung、Seok Yeol Yoo、Yonghoon Jin、Jaehyun You、Seungcheol Han、Jeongwoo Yu、Yoonsu Park、Seung Hwan Cho
DOI:10.1002/anie.202218794
日期:2023.3.20
We report an iridium-catalyzed highly chemo-, diastereo-, and enantioselective allyl-allyl coupling between branched allyl alcohols and α-silyl-substituted allylboronate esters resulting in enantioenriched (E)-1-boryl-substituted 1,5-dienes. All four stereoisomers with two adjacent chiral centers were obtained by chirality pairing. Mechanistic studies were conducted to understand the high levels of
我们报告了支链烯丙醇和 α-甲硅烷基取代的烯丙基硼酸酯之间的铱催化的高度化学、非对映和对映选择性烯丙基-烯丙基偶联,导致对映体富集 (E)-1-硼基取代的 1,5-二烯。所有四种具有两个相邻手性中心的立体异构体都是通过手性配对获得的。进行了机理研究以了解高水平的选择性。