Synthesis of Novel Imidazotriazepines and their Conversion to 9-(2-Ethylaminoethyl)adenine and 9-(2-Ethylaminoethyl)hypoxanthine

Cyclisation of 5-aminoimidazoles, derived from N-ethylethylenediamine, to give either novel imidazotriazepines or the 9-substituted adenine or hypoxanthine are described. The triazepines were further converted to the same two purines