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Quasi-tautomerism of 5-hydroxy-5-phenyl-5H-pyrido[2,3-b]chromenes in sulfuric acid

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Chemistry of Heterocyclic Compounds Aims and scope

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Abstract

The existence of a quasi-tautomeric equilibrium in solutions of 5-hydroxy-5-phenyl-5H-pyrido[2,3-b]chromenes in sulfuric acid, which was confirmed by a linear dependence of the logarithms of the indicator ratios on acidity function HR — HO with a slope close to unity, was established. The pK values of this equilibrium correlate with the σ op and σ oR. substituent constants.

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Authors and Affiliations

  1. Perm State Pharmaceutical Institute, 614600, Perm

    V. M. Petrichenko & M. E. Konshin

Authors
  1. V. M. Petrichenko
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  2. M. E. Konshin
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 753–755, June, 1984.

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Petrichenko, V.M., Konshin, M.E. Quasi-tautomerism of 5-hydroxy-5-phenyl-5H-pyrido[2,3-b]chromenes in sulfuric acid. Chem Heterocycl Compd 20, 607–609 (1984). https://doi.org/10.1007/BF00508664

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  • DOI: https://doi.org/10.1007/BF00508664

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