Pd-Catalyzed Tandem Chemoselective Synthesis of 2-Arylbenzofurans using Threefold Arylating Triarylbismuth Reagents
作者:Maddali L. N. Rao、Deepak N. Jadhav、Priyabrata Dasgupta
DOI:10.1002/ejoc.201201314
日期:2013.2
A tandemchemoselectivesynthesis of 2-arylbenzofurans was accomplished from o-hydroxy-gem-(dibromovinyl)benzenes and BiAr3 reagents under palladium-catalyzed conditions. This unique and synthetically valuable strategy proceeds through three consecutive coupling reactions involving triarylbismuthreagents and provides 2-arylbenzofuran products in high yields.
Tandem Synthesis of 2-Carboxybenzofurans <i>via</i> Sequential Cu-Catalyzed C–O Coupling and Mo(CO)<sub>6</sub>-Mediated Carbonylation Reactions
作者:Qinliang Mo、Nan Sun、Liqun Jin、Baoxiang Hu、Zhenlu Shen、Xinquan Hu
DOI:10.1021/acs.joc.0c01620
日期:2020.9.4
A modular tandem synthesis of 2-carboxybenzofurans from 2-gem-dibromovinylphenols has been established based on a sequence of Cu-catalyzed intramolecular C–O coupling and Mo(CO)6-mediated intermolecular carbonylationreactions. This protocol allowed one-step access to a broad variety of functionalized benzofuran-2-carboxylic acids, esters, and amides in good to excellent yields under Pd- and CO gas-free
Palladium-Catalyzed Tandem Synthesis of 2-Trifluoromethylthio(seleno)-Substituted Benzofused Heterocycles
作者:Mengjia Zhang、Zhiqiang Weng
DOI:10.1021/acs.orglett.9b01922
日期:2019.8.2
The tandem synthesis of 2-trifluoromethylthio(seleno)-substituted benzofurans using palladium-catalyzed conditions is reported. Trifluoromethylthio(seleno)lation of 2-(2,2-dibromovinyl)phenols with (bpy)CuSCF3 or [(bpy)CuSeCF3]2 furnishes several 2-trifluoromethylthio(seleno)lated benzofurans in acceptable to good yield. Mechanistic investigations were performed to elucidate the reaction pathway, which