Transition-Metal-Free C3 Arylation of Indoles with Aryl Halides

被引：75

作者：

Chen, Ji ^{[1
]}

Wu, Jimmy ^{[1
]}

机构：

[1] Dartmouth Coll, Dept Chem, Hanover, NH 03755 USA

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2017年 / 56卷 / 14期

关键词：

aryne; cross-coupling; indole; radicals; transition metal-free synthesis; ELECTRON-TRANSFER REACTIONS; POTASSIUM TERT-BUTOXIDE; CYCLOADDITION REACTIONS; DIARYLIODONIUM SALTS; UNACTIVATED ARENES; GENERAL-METHOD; C-3; ARYLATION; H ACTIVATION; O-ARYLATION; BENZENE;

D O I：

10.1002/anie.201612311

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We report an unprecedented transition metal-free coupling of indoles with aryl halides. The reaction is promoted by KOtBu and is regioselective for C3 over N. The use of degassed solvents devoid of oxygen is necessary for the success of the transformation. Preliminary studies implicate a hybrid mechanism that involves both aryne intermediates and non-propagative radical processes. Electron transfer is alsoadistinct possibility. These conclusions were substantiated by EPR data, isotopic labeling studies, and the use of radical scavengers and electron transfer inhibitors.

引用

页码：3951 / 3955

页数：5

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