Hydrogen-Bonding Network Promoted [3+2] Cycloaddition: Asymmetric Catalytic Construction of Spiro-pseudoindoxyl Derivatives
作者:Liang-Jie Zhang、Yao Wang、Xiu-Qin Hu、Peng-Fei Xu
DOI:10.1002/asia.201600013
日期:2016.3.18
carbon center at the C2 position of indole has long been an elusive problem in organic synthesis. Herein, by employing a rationally designed hydrogen‐bonding network activation strategy, for the first time, 2,2′‐pyrrolidinyl‐spirooxindole, which is a valuable and prevalent indole alkaloid scaffold, was directly obtained through a catalytic asymmetric [3+2] cycloaddition reaction with high yields and excellent
在吲哚的C 2位上的螺环四元立体立体碳中心的对映选择性构造长期以来一直是有机合成中难以解决的问题。在此,通过合理设计的氢键网络活化策略,首次通过催化不对称[3 + 2]直接获得了2,2'-吡咯烷基-螺氧杂吲哚,这是一种有价值的,流行的吲哚生物碱支架。高收率和优异的立体选择性的环加成反应。