Iminophosphorane-Mediated Annulation of 1,3,5-Triazine to Benzimidazole: Synthesis of 1,3,5-Triazino[1,2-<i>a</i>]benzimidazoles
作者:Pedro Molina、Angeles Lorenzo、Enrique Aller
DOI:10.1055/s-1992-26096
日期:——
A number of 1,3,5-triazino[1,2-a]benzimidazoles 5 and 7 have been prepared by aza-Wittig-type reaction of 2-(triphenylphosphoranylideneamino)benzimidazoles 2 and 6, which were derived from 2-aminobenzimidazoles, with isocyanates under neutral conditions.