Bis(Iminophosphorane)-Mediated 1,2,4-Triazoloannulation On Imidazole And Benzimidazole Rings. Preparation Of Imidazo-1,2,4-Triazoles And 1,2,4-TriazoloBenzimidazoles

Article abstract of DOI:10.3987/COM-93-S106

Aza Wittig-type reactions of bis(iminophosphoranes)derived from 1,2-diaminoimidazole and 1,2-diaminobenzimidazole with isocyanates and aroyl chlorides afforded imidazo<1,2-b>-1,2,4-triazoles or 1,2,4-triazolo<1,5-a>benzimidazoles, respectively.