Abstract
The intramolecular cyclization of 2-(N-acylthioureido)-3-carbethoxy-4,5-R,R'-thiophenes with the formation of potassium salts of 2-thio-4-oxo-5,6-R,R'-3,4-dihydrothieno[2,3-d] pyrimidine was studied, and some of their S-derivatives were obtained.
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K. Gewald, E. Schinke, and H. Böttcher, Chem. Ber.,99, 94 (1966).
S. M. Khripak, A. A. Dobosh, and I. V. Smolanka, Khim. Geterotsikl. Soedin., 567 (1973).
G. F. Bol'shakov, V. S. Vatago, and F. B. Agrest, Ultraviolet Spectra of Heterocyclic Compounds [in Russian], Khimiya, Leningrad (1969), p. 17.
I. V. Smolanka, A. A. Dobosh, and S. M. Khripak, Ukr. Khim. Zh.,39, 402 (1973).
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 486–488, April, 1974.
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Dobosh, A.A., Khripak, S.M. & Smolanka, I.V. Cyclization of some substituted 2-(n-acylthioureido)-3-carbethoxythiophenes. Chem Heterocycl Compd 10, 421–423 (1974). https://doi.org/10.1007/BF00945631
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DOI: https://doi.org/10.1007/BF00945631