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Highly Efficient Aza-Michael Reactions of Enones with Carbamates Using a Combination of Quaternary Ammonium Salts and BF3·OEt2 as a Catalyst

Li-Wen Xu, Lyi Li, Chun-Gu Xia*, Shao-Lin Zhou, Jing-Wei Li, Xiao-Xue Hu
State Key Laboratory of Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, P. R. China
Fax: +86(931)8277088; e-Mail: cgxia@ns.lzb.ac.cn;