Synthesis of 2Н-azolo[1,5-а][1,2,3]triazolo[4,5-е]pyrimidines
6-Nitroazolo[1,5-а]pyrimidines were used as dipolarophiles in a reaction with sodium azide providing previously unknown 2Н-azolo[1,5-а]-[1,2,3]triazolo[4,5-е]pyrimidines.