Abstract
It is shown by means of IR, UV, and PMR spectroscopy that 5-amino-6-thio-1,6-dihydropyrimidines exist primarily in the thione form both in the crystalline state and in solution.
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See [1] for communication XXXIII.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 398–401, March, 1977.
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Keremov, A.F., Peresleni, E.M., Vlasova, T.F. et al. Derivatives of condensed pyrimidine, pyrazine, and pyridine systems. Chem Heterocycl Compd 13, 322–325 (1977). https://doi.org/10.1007/BF00470320
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DOI: https://doi.org/10.1007/BF00470320