Cyclocondensation reactions of 3-amino-2-hydrazino-4(3H)-pyrimidinones. Formation of 1,2,4-triazolo[4,3-a]pyrimidines and pyrimido[1,2-b][1,2,4,5]tetrazines
Cyclocondensation reactions of 3-amino-2-hydrazino-4(3H)-pyrimidinones. Formation of 1,2,4-triazolo[4,3-a]pyrimidines and pyrimido[1,2-b][1,2,4,5]tetrazines