Acetals of lactams and acid amides

Reaction of N,N-dimethylacetamide and N-methylbutyro-,-valero-, and caprolactam diethylacetals with ethyl -aminocrotonate gave the corresponding cnamidines, through the eyclization of which 2-dimethylamino-6-methyl-4-pyridone, 1,6-dimethyl-4-oxo-2,3,4,7-tetrahydropyrrolo[2,3-b]pyridine, and l,7-dimethyl-5-oxo-1,3,4,5,8-hexahydro-1,8-naphthyridine were synthesized.See [1] for communication XV.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 805–808, June, 1976.