Reactions of 9-Substituted 1-Aminoadenines with Nucleophiles and Syntheses of 3-Substituted 3H-Imidazo[4, 5-e][1, 2, 4]triazolo[1, 5-c][1, 2, 3]triazines

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Abstract
Reactions of 1-aminoadenines (2) with NH2OH gave adenine 1-oxides (6). Alkaline treatment of 2 afforded 5-amino-4-(1, 2, 4-triazol-3-yl)imidazoles (3), which were converted to 3H-imidazo[4, 5-e][1, 2, 4]triazolo[1, 5-c][1, 2, 3]triazines (5), aza analogues of 3H-[1, 2, 4]triazolo[3, 2-i]purines (4), by treatment with NaNO2.