A catalytic asymmetric hetero-Diels–Alder reaction of olefinic azlactones and isatins: facile access to chiral spirooxindole dihydropyranones
作者:Tai-Ping Gao、Jun-Bing Lin、Xiu-Qin Hu、Peng-Fei Xu
DOI:10.1039/c4cc03896g
日期:——
A catalytic asymmetric hetero-Diels-Alder (HDA) reaction has been achieved through hydrogen-bond directed gamma-addition of olefinic azlactones to isatins. This methodology provides an efficient access to spirooxindole dihydropyranones in moderate to good yields and with excellent enantioselectivities.
催化不对称杂Diels-Alder(HDA)反应是通过氢键直接将烯烃a内酯加到isatins上的伽马加成反应而实现的。这种方法可以高效,高效地获得螺环吲哚二氢吡喃酮,并且具有出色的对映选择性。