Abstract
2-Substituted 3-methylpyrido[2,3-b]chromones were obtained by heating 5-substituted 6-methyl-2-phenoxynicotinonitriles in polyphosphoric acid. Their behavior in sulfuric acid solutions was studied by means of spectrophotometry.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1229–1231, September, 1982.
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Petrichenko, V.M., Konshin, M.E. Synthesis and acid-base transformations of 2-substituted 3-methylpyrido-[2,3-b]chromones. Chem Heterocycl Compd 18, 946–948 (1982). https://doi.org/10.1007/BF00513438
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DOI: https://doi.org/10.1007/BF00513438