作者:Iain Coldham、Alan J Collis、Roger J Mould、Richard E Rathmell
DOI:10.1016/0040-4039(95)00557-s
日期:1995.5
of unsaturated piperidines from 2-keto aziridines is reported, Treatment of a range of 2-keto aziridines with two equivalents of a phosphonium ylide generates intermediate vinyl aziridines which rearrange by a [2,3]-sigmatropic shift to create a new carbon-carbon bond with concomitant ring opening of the aziridines to give the unsaturated piperidines. This three- to six-membered ring expansion allows
据报道由2-酮氮丙啶一锅两步合成不饱和哌啶。用两当量的叶立德处理一系列2-酮氮丙啶可生成中间体乙烯基氮丙啶,它们经[2,3]-重排σ位移以产生新的碳-碳键,同时氮丙啶的开环得到不饱和哌啶。这种三至六元环扩展允许合成N-未取代的哌啶和哌考酸衍生物。