Abstract
The tautomeric equilibria of acylmethylpyrazines and -quinoxalines in chloroform were studied by 1H, 14N, and 17O NMR spectroscopy. It was shown that keto-enol tautomerism is realized in the acylmethylpyrazine series. Annelation leads to the development of an ylidene tautomer in the acylmethylquinoxaline series. A marked dependence of the position of the intrachelate equilibrium on the character of the solvent was observed.
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See [1] for Communication 15.
Deceased.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1663–1667, December, 1987.
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Mainagashev, I.Y., Lapachev, V.V., Fedotov, M.A. et al. Tautomerism of derivatives of azines. 16. Tautomerism of acylmethylpyrazines and -quinoxalines. Chem Heterocycl Compd 23, 1339–1342 (1987). https://doi.org/10.1007/BF00472261
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DOI: https://doi.org/10.1007/BF00472261