Intramolecular rearrangement of substituted l,2,3,6-tetrahydropyrimidine-2-thiones |
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| Authors: | B V Unkovskii L A Ignatova P L Ovechkin A I Vinogradova |
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| Institution: | (1) M. V. Lomonosov Moscow Institute of Fine Chemical Technology, USSR |
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| Abstract: | The intramolecular rearrangement of substituted 1,2,3,6-tetrahydropyrimidine-2-thiones to the isomeric 2-alkyl(aryl)amino-4H-1,3-thiazines was studied. The rearrangement proceeds in acid media to form the intermediate 4-hydroxyhexahydropyrimidine-2-thiones and their tautomeric 3-oxoalkylthioureas and is accompanied by ring cleavages of the tetrahydropyrimidine-2-thiones.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1690–1694, December, 1970. |
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