Base-induced rearrangement of tritylamines to imines: discovery and investigation of the mechanism
作者:Vassiliki Theodorou、Konstantinos Skobridis、Aris Karkatsoulis
DOI:10.1016/j.tet.2007.03.055
日期:2007.5
nucleophilic attack of the nitrogen anion of tritylamide on the adjacent C-bonded phenyl, either substituted or not, involving a bridging anionic intermediate, is proposed for this base-induced tritylamine rearrangement to produce the corresponding imine. Electron-withdrawing groups in the aromatic ring, favoring the negative charge development, affect the relative migratory tendencies.
在制备伯胺的过程中,在N-烷基三苯甲基胺的形成过程中,用n- BuLi和烷基卤化物处理三苯甲基胺时,分离出了一种出人意料的化合物,即苯胺衍生的二苯甲酮亚胺。对于该碱诱导的三苯甲基胺重排以产生相应的亚胺,提出了三苯甲基酰胺的氮阴离子对相邻的C键联的苯基上的取代或未取代的亲电子攻击,涉及桥接的阴离子中间体。芳香环中的吸电子基团有利于负电荷的发展,影响相对迁移趋势。