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Acid–Base Properties of 3-Benzazolylcoumarins and Their Imino Analogs

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Abstract

The acid–base equilibria of 3-(N-methyl-2-benzimidazolyl)coumarins and imino chromenes were studied in aqueous ethanol. The major reason for the difference in their proton-acceptor capacity relative to their nonmethylated analogs lies in a loss of planarity of these molecules. The tautomerism of 7-hydroxy-2-iminochromene is discussed.

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Authors and Affiliations

  1. Scientific-Research Institute of Chemistry at V. N. Karazin Kharkiv National University, 4 Svobody Pl., 61077, Kharkiv, Ukraine

    Z. A. Sizova, A. A. Karasev, L. L. Lukatskaya, M. I. Rubtsov & A. O. Doroshenko

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  1. Z. A. Sizova
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  2. A. A. Karasev
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  3. L. L. Lukatskaya
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  4. M. I. Rubtsov
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  5. A. O. Doroshenko
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Sizova, Z.A., Karasev, A.A., Lukatskaya, L.L. et al. Acid–Base Properties of 3-Benzazolylcoumarins and Their Imino Analogs. Theoretical and Experimental Chemistry 38, 168–172 (2002). https://doi.org/10.1023/A:1019652918510

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  • DOI: https://doi.org/10.1023/A:1019652918510

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