Impact of Substituents Attached to N-Heterocyclic Carbenes on the Catalytic Activity of Copper Complexes in the Reductio
By using functionalized imidazolium salts such as 1-allyl-3-alkylimidazolium or 1-alkyi-3-vinylimidazolium salts as carbene ligand precursors, the reduction of aryl ketones with triethoxysilane may be catalyzed by copper salt/imidazolium salt/KO~tBu systems. The functional substituents attached to the N-heterocyclic carbene (NHC) serve to enhance the catalytic activity. Different copper salts also have an effect on the catalytic activity, with copper(Ⅱ) acetate monohydrate being superior to copper(I) chloride.
作 者： PENG, Jiajian CHEN, Lingzhen XU, Zheng HU, Yingqian LI, Jiayun BAI, Ying QIU, Huayu LAI, Guoqiao 作者单位： Key Laboratory of Organosilicon Chemistry and Material Technology of the Ministry of Education,Hangzhou Normal University, Hangzhou, Zhejiang 310012, China 刊 名： 中国化学（英文版） SCI 英文刊名： CHINESE JOURNAL OF CHEMISTRY 年，卷(期)： 2009 27(11) 分类号： O6 关键词： N-heterocyclic carbene ketone reduction