Azaindole derivatives. 62. Synthesis and transformations of condensed three-ring systems that include a 5-azaindoline fragment

The reaction of 7-carbamoyl- and 7-cyano-6-chloro-5-azaindolines with hydrazine leads to the formation of pyrrolo2,3-d]pyrazolo5,4-b]pyridine, whereas the reaction of 7-carbamoyl-5-azaindolines with dimethylformamide diethylacetal gives pyrrolo1,2-c]pyrido]4,3-d]pyrimidines — two new heterocyclic systems. The chemical properties of the synthesized compounds, including cleavage of the pyrimidine ring under the influence of nucleophilic agents, were studied.See 1] for communication 61.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1370–1373, October, 1982.