Reaction of 2,3-dioxo-4-(N,N-dimethylaminomethylene)hexahydroazepine with hydrazine and its derivatives

8-Oxo-8H-4,5,6,7-tetrahydropyrazolo5,4-c]azepine and a mixture of 2-phenyl-8-oxo-8H-4,5,6,7-tetrahydro 3,4-c]azepine and 2,3-dioxo-4-formylhexahydroazepine 4-phenylhydrazone were obtained in the reactions of 2,3-dioxo-4-(N,N-dimethylaminomethylene)-hexahydroazepine with hydrazine and phenylhydrazine, respectively. Cyclization of 2,3-dioxo-4-formylhexahydroazepine 4-phenylhydrazone gave 1-phenyl-8-oxo-8H-4,5,6,7-tetrahydropyrazolo 5,4-c]azepine. The reaction of 2,3-dioxo-4-(N,N-dimethylaminomethylene)hexahydroazepine with semicarbazide and thiosemicarbazide gives 2,3-dioxo-4-formylhexahydroazepine 4-semicarbazone and 4-thiosemicarbazone.Communication XXX from the series Research on Lactams. See 1] for communication XXIX.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1248–1251, September, 1978.