Abstract
The first step in the acid-catalyzed reaction of 5,6-diamino-1,3-dimethyluracil with carbonyl compounds is the formation of an azomethine at the 5-amino group. Chalcone derivatives undergo a further substitution; the 6-amino group is replaced by a hydroxyl group with subsequent ring closure and the formation of a 2,3-dihydro-1,5-oxazepine ring. Azomethines based on arylidenacetones forms 2,3-dihydropyrimidino[5,6-b]-1,5-diazepine derivatives.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 241–246, February, 1984.
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Orlov, V.D., Papiashvili, I.Z. Reactions of 5,6-diamino-1,3-dimethyluracil with carbonyl compounds. Chem Heterocycl Compd 21, 200–205 (1985). https://doi.org/10.1007/BF00504210
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DOI: https://doi.org/10.1007/BF00504210