Ni‐Catalyzed Regio‐ and Enantioselective Homoallylic Coupling: Synthesis of Chiral Branched 1,5‐Dienes Featuring a Quaternary Stereogenic Center and Mechanistic Analysis
作者:Debasish Ghorai、Aleria Garcia‐Roca、Balázs L. Tóth、Jordi Benet‐Buchholz、Arjan W. Kleij
DOI:10.1002/anie.202314865
日期:2023.12.11
A reductive cross-electrophile coupling of allylic carbonates under Ni-catalysis provides access to unique 1,5-dienes featuring a quaternary stereogenic center under high chemo-, regio-, diastereo- and enantio-control. Mechanistic studies align well with a catalytic cycle based on a Ni(0)/Ni(II) couple with a crucial role for divalent Zn boosting the overall kinetics and selectivity while favoring
在镍催化下,烯丙基碳酸酯的还原交叉亲电子偶联可得到独特的 1,5-二烯,该二烯具有在高化学、区域、非对映和对映体控制下的季立体中心。机理研究与基于 Ni(0)/Ni(II) 电对的催化循环非常吻合,二价 Zn 在提高整体动力学和选择性方面发挥着至关重要的作用,同时有利于关键双金属 C−C 键的形成。