Abstract
Nucleophilic substitution at the C(4) atom in 4-hydroxy(alkoxy)hexahydropyrimidine-2-thiones under the influence of alkanethiols in acidic, neutral, and basic media, as a result of which 4-alkylthiohexahydropyrimidine-2-thiones are formed, was studied. Hydrolysis and alcoholysis of the latter lead to the corresponding 4-hydroxy- or 4-alkoxyhexahydropyrimidine-2-thiones. The three-dimensional structures of the 4-alkylthiopyrimidines obtained were established by PMR spectroscopy, and it was shown that the stereoisomers with an axially oriented alkylthio group are thermodynamically more stable.
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L. A. Ignatova, A. D. Shutalev, A. G. Shingareeva, S. F. Dymova, and B. V. Unkovskii, Khim. Geterotsikl. Soedin., No. 2, 260 (1985).
D. Beke, C. Szantay, and M. Beke-Barchai, Annalen, 635, 150 (1960).
A. M. Arnett, in: Modern Problems of Physical Organic Chemistry [Russian translation], Mir, Moscow (1967), p. 195.
A. Kirby, The Anomeric Effect of Oxygen-Containing Compounds [Russian translation], Mir, Moscow (1985), p. 94.
R. K. Ritchie and H. Spedding, Spectrochim. Acta, 26A, 9 (1970).
K. Dwarakanath and D. N. Sathyanarayana, Indian J. Chem., 18A, 302 (1979).
A. Gordon and R. Ford, The Chemist's Guide [Russian translation], Mir, Moscow (1976), p. 303.
H. W. Dias and M. R. Truter, Acta Cryst., 17, 937 (1964).
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 234–240, February, 1988.
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Ignatova, L.A., Shutalev, A.D., Pagaev, M.T. et al. Nucleophilic substitution at the C(4) atom in series of functionally 4-substituted hexahydropyrimidine-2-thiones. Synthesis of 4-alkylthiohexahydropyrimidine-2-thiones. Chem Heterocycl Compd 24, 197–203 (1988). https://doi.org/10.1007/BF00473332
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DOI: https://doi.org/10.1007/BF00473332