作者:Jiajin Zhao、Guoxiong Xu、Xue Wang、Jiren Liu、Xiang Ren、Xin Hong、Zhan Lu
DOI:10.1021/acs.orglett.2c01701
日期:2022.7.1
multipositional isomerization of conjugated dienes has been reported for the first time using an 8-oxazoline iminoquinoline ligand. This reaction is operationally simple and atom-economical using readily available starting materials with an E/Z mixture to access disubstituted 1,3-dienes with excellent yields and good E,E stereoselectivity. The mechanism via alkene insertion of cobalt hydride species and β-H elimination
使用 8-恶唑啉亚氨基喹啉配体首次报道了钴催化的共轭二烯的多位异构化。该反应操作简单且原子经济,使用容易获得的起始材料和E/Z混合物来获得二取代的 1,3-二烯,具有优异的收率和良好的E、E立体选择性。在氘标记和控制实验以及密度泛函理论计算的基础上,提出了通过烯烃插入氢化钴物种和β-H消除π-烯丙基钴中间体的机理。