Oxidative Rearrangement of Spiro Cyclobutane Cyclic Aminals: Efficient Construction of Bicyclic Amidines
作者:Kenichi Murai、Hideyuki Komatsu、Ryu Nagao、Hiromichi Fujioka
DOI:10.1021/ol203313n
日期:2012.2.3
A new rearrangement reaction of spirocyclic cyclobutane N-halo aminals is described. This process, promoted by treatment of the aminals with N-halosuccinimides (NXS, X = Br or Cl), efficiently produces bicyclic amidines by a pathway involving initial N-halogenation of one of the aminal nitrogens followed by cyclobutane ring expansion through 1,2-C-to-N migration with simultaneous N–X bond cleavage
描述了螺环环丁烷N-卤代缩醛的新的重排反应。通过用N-卤代琥珀酰亚胺(NXS,X = Br或Cl)处理氨基缩醛来促进这一过程,该方法通过涉及一个氨基氮原子的初始N-卤化然后环丁烷环膨胀到1,2的途径有效地产生了双环am从C到N的迁移,同时发生N–X键断裂。