Tertiary Amines Acting as Alkyl Radical Equivalents Enabled by a P/N Heteroleptic Cu(I) Photosensitizer
作者:Limeng Zheng、Qinfang Jiang、Hanyang Bao、Bingwei Zhou、Shu-Ping Luo、Hongwei Jin、Huayue Wu、Yunkui Liu
DOI:10.1021/acs.orglett.0c03236
日期:2020.11.20
An unprecedented exploration of tertiary amines as alkyl radical equivalents for cross-coupling with aromatic alkynes to access allylarenes has been achieved by a P/N heteroleptic Cu(I)-based photosensitizer under photoredox catalysis conditions. Mechanistic studies reveal that the reaction might undergo radical addition of in situ-generated α-amino radical intermediates to alkynes followed by 1,5-hydrogen
通过在光氧化还原催化条件下使用P / N杂合性基于Cu(I)的光敏剂,对叔胺作为烷基当量与芳族炔烃进行交叉偶联以获取烯丙基芳烃进行了空前的探索。机理研究表明,该反应可能经历了将原位生成的α-氨基自由基中间体自由基加成至炔烃的反应,然后发生了1,5-氢转移,C–N键断裂以及随之而来的烯丙基自由基物种的异构化。