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 intramolecularDiels–Alder) forming the polycyclic systems in good to