8-Aminoadenine derivatives2were obtained from 8-bromoadenines1in one-pot reactionvia8-azidoadenines. Reaction of 8-bromoadenines1with methylamine or dimethylamine in ethanol afforded the correspondingN9-substituted 8-(methylamino)adenines3and 8-(dimethylamino)adenines4. Alkylation of 8-aminoadenine (2a) with diverse alkylation agents affordedN9-substituted 8-aminoadenine derivatives2, and alkylation of 8-(dimethylamino)adenine (4a) gave mixtures of the correspondingN9-substituted 8-(dimethylamino)adenines4and theirN3-substituted regioisomers5. 8,3'-N-Anhydro derivatives7were prepared by tosylation of (S)-8-bromo-9-2-[(diisopropoxyphosphoryl)- methoxy]-3-hydroxypropyl}adenine (1c) followed by treatment with methanolic ammonia or methylamine solution.