acylphosphoranes 5 formed in a highly selective and sequential manner from the reaction of N-substituted anthranilic acids 1 and N-phenyl(triphenylphosphoranylidene)ethenimine 2 undergo intramolecular Wittig cyclization on the imide carbonyl to afford the pyrrolo- and pyrido[1,2-a]quinolones 6 in moderate to good yields.
所述acylphosphoranes 5从反应形成的以高选择性和顺序方式的N-取代的
邻氨基苯甲酸1和N-苯基(三苯基亚正膦)ethenimine 2经历分子内环化反应的Wittig上
酰亚胺羰基,得到
吡咯和
吡啶并[1,2 a]中等至良好产量的喹诺
酮类6。