Intramolecular thermal transformations of N-phthalimidoaziridines: 1,3-dipolar cyclo-addition and rearrangements*
作者:M. A. Kuznetsov、A. S. Pan’kova、V. V. Voronin、N. A. Vlasenko
DOI:10.1007/s10593-012-0921-6
日期:2012.2
The intramolecular thermal cycloaddition of N-phthalimidoaziridines at multiple bonds of substituents with the intermediate formation of azomethine ylides leads to condensed pyrrole derivatives, in which the five-membered ring is adjacent to a five-, six-, or seven-membered ring. Rearrangements, which sometimes become the predominant reactions, compete with cycloaddition. Thus, aziridines with aryl
N的分子内热环加成取代基的多个键处的邻苯二甲亚氨基氮丙啶与中间形成的甲亚胺基团导致稠合的吡咯衍生物,其中五元环与五元,六元或七元环相邻。有时成为主要反应的重排与环加成竞争。因此,具有芳基取代基的氮丙啶易于异构化,以得到邻苯二甲酰亚胺基团被1,2-转移到一个碳原子上的亚胺。具有一个吸电子取代基的氮丙啶可能不会打开以产生1,3-偶极子,而是会发生Cope型重排,涉及第二个取代基的三元环和C = O键。即使在分子内反应中,也发现氰基三键和芳环键作为双极性亲和剂的活性非常低。