文献类型：期刊文献

英文题名：Ethanol-promoted reductive homocoupling reactions of aryl halides catalyzed by palladium on carbon (Pd/C)

作者：Shao, Linjun[1];Du, Yijun[2];Zeng, Minfeng[1];Li, Xiudong[1];Shen, Wenting[1];Zuo, Shufeng[1];Lu, Yueqing[1];Zhang, Xian-Man[1];Qi, Chenze[1]

机构：[1]Shaoxing Univ, Inst Appl Chem, Shaoxing 312000, Zhejiang, Peoples R China;[2]Shaoxing Univ, Coll Yuanpei, Shaoxing 312000, Zhejiang, Peoples R China

年份：2010

卷号：24

期号：5

起止页码：421

外文期刊名：APPLIED ORGANOMETALLIC CHEMISTRY

收录：SCI-EXPANDED(收录号：WOS:000277325500011)、、EI(收录号：20101612861358)、Scopus(收录号：2-s2.0-77950955532)、WOS

基金：This work was generously supported by the Natural Science Foundation of Zhejiang Province, People's Republic of China (no. Y-4080450) and Shaoxing University. We would like to thank Professor Q. X. Guo and Dr H. Z. Yu for their kind help in Gaussian 03 calculations.

语种：英文

外文关键词：palladium; biaryls; aryl halides; homocoupling; ethanol

外文摘要：Homocoupling reactions of aryl bromides or iodides proceeded smoothly with palladium on carbon (Pd/C) catalyst, ethanol and base in dimethyl sulfoxide (DMSO) to afford exclusively symmetric biaryls in good to excellent yields. Ethanol was first used as a reducing agent in situ to reduce the Pd2+/C species into Pd-0/C active species to complete the catalytic redox cycle. It was found that ethanol can promote the Pd/C-catalyzed reductive homocoupling of aryl iodides and bromides efficiently in the presence of base. A reaction mechanism has been put forward and discussed. Copyright (C) 2010 John Wiley & Sons, Ltd.