Ring-chain tautomerism of S-acylalkylmercapto-substituted aminoquinoxalines

The ring-chain tautomerism of S-acylalkylmercapto-substituted aminoquinoxalines was studied by means of IR and PMR spectroscopy. It was established that, depending on the substituants,the investigated compounds have open or cyclic structures or exist in the form of mixtures of these forms. Mixtures of diastereomeric forms were detected for two of the investigated compounds.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 114–120, January, 1979.