<i>N</i>-Bromosuccinimide (NBS)-Catalyzed C–H Bond Functionalization: An Annulation of Alkynes with Electron Withdrawing Group (EWG)-Substituted Acetyl Indoles for the Synthesis of Carbazoles
作者:Han Wang、Zhen Wang、Yi-Long Wang、Rui-Rui Zhou、Guang-Chuan Wu、Si-Yao Yin、Xu Yan、Bin Wang
DOI:10.1021/acs.orglett.7b03021
日期:2017.11.17
An N-bromosuccinimide-catalyzed intermolecular annulation of acetyl indoles with alkynes was developed, allowing for regioselective formation of valuable carbazoles through direct C–H bond functionalization. The readily available catalyst, wide substrate scope, gram scale synthesis, and mild conditions make this method practical. Mechanistic investigations indicate that the bromination of acetyl indole
A chemo- and regioselective α-hydroxylationreaction of carbonyl compounds with molecularoxygen as oxidant is reported. The hydroxylation reaction is catalyzed by a dinuclear Pd(II) complex, which functions as an oxygen transfer catalyst, reminiscent of an oxygenase. The development of this oxidation reaction was inspired by discovery and mechanism evaluation of previously unknown Pd(III)-Pd(III)