P/N Heteroleptic Cu(I)-Photosensitizer-Catalyzed Deoxygenative Radical Alkylation of Aromatic Alkynes with Alkyl Aldehydes Using Dipropylamine as a Traceless Linker Agent
作者:Hanyang Bao、Bingwei Zhou、Shu-Ping Luo、Zheng Xu、Hongwei Jin、Yunkui Liu
DOI:10.1021/acscatal.0c02454
日期:2020.7.17
alkylation of aromatic alkynes with alkyl aldehydes for the preparation of allylarenes has been successfully achieved. This transformation is accomplished through the reaction of alkyl aldehydes with alkynes in the presence of dipropylamine and Hantzsch ester catalyzed by a P/N heteroleptic Cu(I)-based photosensitizer under photoredox catalysis conditions. Preliminary mechanistic studies reveal that this
已成功实现了芳香族炔烃与烷基醛的脱氧自由基烷基化反应,以制备烯丙基芳烃。通过在光氧化还原催化条件下,P / N杂化基于Cu(I)的光敏剂催化的二丙胺和Hantzsch酯存在下,烷基醛与炔烃的反应可实现这种转化。初步的机理研究表明,该醛-炔烃偶联过程包括将原位生成的烷基取代的α-氨基自由基选择性加成到炔烃上,随后进行1,5-质子转移,C–N键裂解以及随之而来的异构化。产生的烯丙基基团。因此,最终结果