Chemistry of Heterocyclic Compounds p. 1339 - 1342 (1987)
Update date:2022-08-05
Topics:
Mainagashev, I. Ya.
Lapachev, V. V.
Fedotov, M. A.
Mamaev, V. P.
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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