文献类型：期刊文献

英文题名：Investigation on the Coordination Mode of IL-Supported Diols Used as Phosphine-Free Ligands for Palladium Catalyzed Heck Reaction

作者：Cai, Yueqin[1];Song, Gonghua[2];Chen, Xiao[1]

机构：[1]E China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Shanghai Key Lab Chem Biol, Inst Pesticides & Pharmaceut, Shanghai 200237, Peoples R China

年份：2013

卷号：31

期号：10

起止页码：1250

外文期刊名：CHINESE JOURNAL OF CHEMISTRY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000326078300003)】；

基金：We acknowledge the Natural Science Foundation of China (Grant 20676033), China Postdoctoral Science Foundation (Grant 20070410169) and Shanghai Leading Academic Discipline Project (Project Number: B507) for financial support.

语种：英文

外文关键词：homogeneous catalysis; acylation; Heck reaction; phosphine-free ligands

摘要：The coordination mode of IL-supported diols used as phosphine-free ligands for palladium catalyzed Heck reaction has been investigated by tuning their compositions. The difference in coordination of these IL-supported diols with metal Pd in Heck reaction was related to the changes of the cation rings, leading to the different activities of Pd catalyst in the reaction. The experimental results indicated that the activities of Pd catalyst were affected mainly by -electron density of the cation rings. Compared to pyridinium and piperidinium cations, imidazolium cations showed the best coordination to metal Pd. In the meantime, C-2 hydrogen and the length of alkyl side chains had impacts on the coordination as well.