Bis(iminophosphorane)-mediated 1,2,4-Triazoloannulation on Imidazole and Benzimidazole Rings. Preparation of Imidazo[1,2-b]-1,2,4-triazoles and 1,2,4-Triazolo[1,5-a]benzimidazoles
作者:Pedro Molina、Enlique Aller、Angeles Lorenzo
DOI:10.3987/com-93-s106
日期:——
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.