Tandem inverse electron demand Diels–Alder, retro-Diels–Alder and intramolecular Diels–Alder sequences: one-pot synthesis of diaza-polycycles
作者:William J. Bromley、Mairi Gibson、Stuart Lang、Steven A. Raw、Adrian C. Whitwood、Richard J.K. Taylor
DOI:10.1016/j.tet.2007.02.056
日期:2007.6
straightforward methodology is described for the construction of complex nitrogen-containing polycycles from substituted 1,2,4-triazines and enamines, prepared in situ from carbonyl components and allylic amines. The transformation proceeds via a pericyclic reaction cascade (inverse electron demand Diels–Alder then retro-Diels–Alder then intramolecular Diels–Alder) forming the polycyclic systems in good to
描述了一种新的直接方法,用于由取代的1,2,4-三嗪和烯胺构造复杂的含氮多环化合物,这些取代环是由羰基组分和烯丙基胺原位制备的。转化过程通过周环反应级联反应(反电子需求Diels–Alder,然后是Diels–Alder,然后是分子内Diels–Alder)形成,形成的多环系统具有良好的收率和优异的收率,并且在一锅法中具有非对映选择性。该方法的范围和局限性被描述为扩展其综合用途的初步研究。