作者:David N.A. Fox、Timothy Gallagher
DOI:10.1016/s0040-4020(01)85590-3
日期:1990.1
electrophile-mediated cyclisation of a series of allenic amines (8a-e), carrying a chiral benzylic residue on nitrogen, has been examined using Ag(I) and Pd(II). The cyclised products, (9/10)(using Ag(I)) and (12/13)(using Pd(II), CO, MeOH), are formed diastereoselectively. With Ag(I) up to 81% d.e. has been observed and the stereochemical course of this reaction has been established. The Pd(II)-mediated cyclisation
已经使用Ag(I)和Pd(II)检查了在氮上带有手性苄基残基的一系列烯丙基胺(8a-e)的亲电试剂介导的环化。非对映选择性地形成(9/10)(使用Ag(I))和(12/13)(使用Pd(II),CO,MeOH)的环化产物。对于Ag(I),已经观察到高达81%的de,并且已经确定了该反应的立体化学过程。Pd(II)介导的环化的选择性较低(高达43%de),并讨论了控制这两个反应选择性的因素。