Abstract
The condensation of 2-amino- and 2-methylthio-4, 6-dihydroxypyrimidines and barbituric and thiobarbituric acids with β-diketones in strong acids leads to pyrylia[2,3-d]pyrimidine salts, which on treatment with ammonia or aniline are converted to pyrido[2,3-d]pyrimidines or to 8-phenylpyrido[2,3-d]pyrimidinium salts, respectively.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1484–1486, November, 1977.
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Chuiguk, V.A., Vlasova, N.N. Pyrylia[2,3-d]pyrimidine salts. Chem Heterocycl Compd 13, 1185–1187 (1977). https://doi.org/10.1007/BF00475940
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DOI: https://doi.org/10.1007/BF00475940