title: A catalytic asymmetric hetero-Diels-Alder reaction of olefinic azlactones and isatins: facile access to chiral spirooxindole dihydropyranones.
abstract: A catalytic asymmetric hetero-Diels-Alder (HDA) reaction has been achieved through hydrogen-bond directed γ-addition of olefinic azlactones to isatins. This methodology provides an efficient access to spirooxindole dihydropyranones in moderate to good yields and with excellent enantioselectivities.
authors: State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, P.R. China. xupf@lzu.edu.cn.
authors: Tai-Ping
authors: TP
authors: Gao
authors: Jun-Bing
authors: JB
authors: Lin
authors: Xiu-Qin
authors: XQ
authors: Hu
authors: Peng-Fei
authors: PF
authors: Xu