Heterocyclic fused rings with bridgehead nitrogen atoms: Single-step synthesis of azolo[1 '',2 '': 1 ',2 ']pyrido[5 ',6 ': 5,4]pyrimido[1,6-a]benzimidazole; Pyrido[1,2-a]benzimidazole; Pyrido[4 '',5 '': 2 ',3 ']pyrido[6 ',5 ': 4,5]pyrimido[1,6-a]benz

摘要

A one-step synthesis of the title compounds by the reaction of arylidene-1H-benzimidazol-2-ylacetonitriles 1a-d with 2-cyanomethylbenzimidazole derivatives 2a,b is reported. [References: 22]