Michael addition of active methylene compounds to α,β-unsaturated carboxylic esters and nitriles was effectively catalyzed by a basic ionic liquid, 1-butyl-3-methylimidazolium acetate（[Bmim]OAc）. The his-addition products were selectively obtained in high yields under mild reaction conditions.
YANG Yu WANG Li-bing ZHANG Zhan LI Cai-meng FU Xian-lei GAO Guo-hua
