Synthesis of 2-aryl-imidazo[4,5-d][1,2,3]triazoles from a 4-nitro-imidazol-5-yl phosphoramidate and aryl isocyanates

The synthesis of a series of 2-aryl-2H,4H-imidazo[4,5-d][1,2,3]triazoles is reported. These compounds are obtained in moderate to good yield by reaction of triethyl N-1-ethyl-2-methyl-4-nitro-1H-imidazol-5-yl phosphoramidate with aryl isocyanates.