Enantioselective conjugate addition of 1-bromonitroalkanes to α,β-unsaturated aldehydes catalyzed by chiral secondary amines
作者:Jun-min Zhang、Zhi-peng Hu、Li-ting Dong、Yi-ning Xuan、Chun-Liang Lou、Ming Yan
DOI:10.1016/j.tetasy.2009.01.003
日期:2009.2
Highly enantioselectiveconjugateaddition of bromonitromethane to α,β-unsaturatedaldehydescatalyzed by chiral secondary amines has been achieved. Diphenylprolinol triethylsilyl ether was found to be the best catalyst for the reaction under MeOH/AcONa system. Various β-aryl acroleins afforded nitrocyclopropanes with excellent enantioselectivities and in good yields; however, the reaction of β-alkyl