Phosphine-Catalyzed Asymmetric Formal [4+2] Tandem Cyclization of Activated Dienes with Isatylidenemalononitriles: Enantioselective Synthesis of Multistereogenic Spirocyclic Oxindoles
作者:Fang-Le Hu、Yin Wei、Min Shi
DOI:10.1002/adsc.201301070
日期:2014.3.10
enantioselective formal [4+2] tandem cyclizations between isatylidenemalononitriles and activated dienes catalyzed by bifunctional chiral phosphine catalysts have been developed, yielding multistereogenic spirocyclic oxindoles in high yields and excellent optical purity. This reaction is accomplished via a tandem Rauhut–Currier/Michael/Rauhut–Currier reaction sequence.
已开发出双功能手性膦催化剂催化的异亚乙基丙二腈和活化的二烯之间的第一个高度对映选择性的正式[4 + 2]串联环化反应,可高收率和出色的光学纯度产生多立体异构螺环式吲哚。该反应是通过串联的Rauhut-Currier / Michael / Rauhut-Currier反应序列完成的。