Computational and further experimental investigations of the previously reported diazadienes, obtained via the rearrangement of methylenecyclopropyl hydrazone 1 are reported. Calculations at the CCSD(T)/cc-pVTZ//B3LYP/6-31G(d) level of theory indicate that the initially reported product 3 would, if formed, undergo rapid electrocyclic ring opening and, hence, would be unstable under the reaction conditions
报道了通过亚甲基环丙基1的重排获得的先前报道的二氮杂二烯的计算和进一步的实验研究。在CC
SD(T)/ cc-pVTZ // B3LYP / 6-31G(d)的理论
水平上进行的计算表明,最初报告的产品3如果形成,则会经历快速的电环开环,因此在低于反应条件。基于此计算预测,对先前归因于3的13 C NMR光谱的进一步分析导致结构3对其N-
甲苯磺酰基
氨基
吡咯结构异构体11的修订。同样,结构8,在
肟6的重排中形成,被修改为N-羟基
吡咯12。