Synthesis of analogs of 5(4)-aminoimidazole-4(5)-carboxamide and purines

5-Diazoimidazole-4-carboxazide was isolated in the diazotization of 5(4)-aminoimidazole-4(5)-carboxhydrazide. The diazotization of N-substituted hydrazides of 5(4)-aminoimidazole-4(5)-carboxylic acis was studied. It is shown that the resulting diazo derivatives undergo cyclization to 3-arylideneaminoimidazo4,5-d]-1,2,3-triazin-4-ones.See 1] for communication 7.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 7, pp. 984–985, July, 1979.