Mild and selective base-free C–H arylation of heteroarenes: experiment and computation
作者:Hannes P. L. Gemoets、Indrek Kalvet、Alexander V. Nyuchev、Nico Erdmann、Volker Hessel、Franziska Schoenebeck、Timothy Noël
DOI:10.1039/c6sc02595a
日期:——
A mild and selective C–H arylation strategy for indoles, benzofurans and benzothiophenes is described. The arylation method engages aryldiazonium salts as arylating reagents in equimolar amounts. The protocol is operationally simple, base free, moisture tolerant and air tolerant. It utilizes low palladium loadings (0.5 to 2.0 mol% Pd), short reaction times, green solvents (EtOAc/2-MeTHF or MeOH) and
描述了吲哚、苯并呋喃和苯并噻吩的温和选择性 C-H 芳基化策略。芳基化方法使用等摩尔量的芳基重氮盐作为芳基化试剂。该方案操作简单、无碱、耐湿且耐空气。它利用低钯负载量(0.5 至 2.0 mol% Pd)、短反应时间、绿色溶剂(EtOAc/2-MeTHF 或 MeOH)并在室温下进行,提供广泛的底物范围(47 个示例)和出色的选择性(吲哚和苯并呋喃的C-2芳基化,苯并噻吩的C-3芳基化。机理实验和 DFT 计算支持 Heck-Matsuda 型耦合机制。