Photoinduced C–H arylation of 1,3-azoles <i>via</i> copper/photoredox dual catalysis
作者:Sven Trienes、Jiawei Xu、Lutz Ackermann
DOI:10.1039/d4sc00393d
日期:——
The visible light-induced C–H arylation of azoles has been accomplished by dual-catalytic system with the aid of an inexpensive ligand-free copper(I)-catalyst in combination with a suitable photoredox catalyst. An organic photoredox catalyst, 10-phenylphenothiazine (PTH), was identified as effective, cost-efficient and environmentally-benign alternative to commonly-used, expensive Ir(III)-based complexes
可见光诱导的唑类 C-H 芳基化反应是通过双催化系统借助廉价的无配体铜 ( I ) 催化剂与合适的光氧化还原催化剂的结合来完成的。有机光氧化还原催化剂 10-苯基吩噻嗪 (PTH) 被认为是常用、昂贵的 Ir( III ) 基络合物的有效、经济且环保的替代品。该方法被证明适用于各种唑衍生物的C-H芳基化,包括恶唑、苯并恶唑、噻唑、苯并噻唑以及更具挑战性的咪唑和苯并咪唑。此外,复杂分子的衍生化和天然产物Balsoxin的克级合成反映了所开发策略的合成效用。机理研究表明以芳基自由基为关键中间体的单电子转移(SET)机制。