Abstract 3-Amino-1, 2, 4-triazoles and 2-aminobenzimidazole were reacted with N- cyanoimidates to give 5-amino-1, 2, 4-triazolo [2, 3-a]-1, 3, 5-triazines (5-azaadenines) and 4-aminobenzimidazo [1, 2-a]-1, 3, 5-triazines, respectively. The structures of the ...