title: Direct asymmetric vinylogous Michael addition of 3-alkylidene oxindoles to chalcones catalyzed by a chiral N,N'-dioxide ytterbium(III) complex.
abstract: A chiral ytterbium(III)-N,N'-dioxide catalyst system has been developed for the catalytic direct asymmetric vinylogous Michael addition of 3-alkylidene oxindoles to chalcones, delivering the γ-substituted alkylideneoxindoles in high yields, enantioselectivities and good Z/E selectivities under mild reaction conditions.
authors.affiliation: Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, 610064, P. R. China. xmfeng@scu.edu.cn.
authors.forename: Xiao
authors.initials: X
authors.lastname: Xiao
authors.forename: Hongjiang
authors.initials: H
authors.lastname: Mei
authors.forename: Quangang
authors.initials: Q
authors.lastname: Chen
authors.forename: Xiaohu
authors.initials: X
authors.lastname: Zhao
authors.forename: Lili
authors.initials: L
authors.lastname: Lin
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Liu
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Feng