Sequential Sonogashira/intramolecular aminopalladation/cross-coupling of <i>ortho</i>-ethynyl-anilines catalyzed by a single palladium source: rapid access to 2,3-diarylindoles
作者:Jiwei Wang、Gendi Wang、Xiang Cheng、Ye Liu、Jun Zhang
DOI:10.1039/d0ob02295k
日期:——
developed a practical and efficient one-pot protocol for the synthesis of 2,3-diarylindoles via Pd-catalyzed bis-arylative cyclization of various o-ethynylanilines with aryl iodides. Mechanism studies showed that a Pd-catalyzed Sonogashira reaction took place firstly, giving an internal alkyne intermediate, which subsequently underwent intramolecular aminopalladation/cross-coupling to give access to 2,3-diarylindoles
我们已经开发了一种实用有效的一锅协议,用于通过钯催化各种邻乙炔基苯胺与碘代芳烃的钯催化双芳基环化反应来合成2,3-二芳基吲哚。机理研究表明,首先发生Pd催化的Sonogashira反应,生成内部炔烃中间体,随后将其进行分子内氨基palpalation /交叉偶联,获得2,3-二芳基吲哚。本方法学显示出广泛的底物范围,产生带有两个不同芳基的各种2,3-二芳基吲哚。