Abstract
Reactions of pentafluorobenzoylpyruvic acid with amines afford the respective enamines. The intramolecular cyclization of the latter results inN-substituted 4-quinolone-2-carboxylic acids. Ammonia and triethylamine favor the cyclization of pentafluorobenzoylpyruvic acid to 2-carboxychromone.
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Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 299–302, February, 1994.
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Saloutin, V.I., Bazyl', I.T., Skryabina, Z.E. et al. Reaction of pentafluorobenzoylpyruvic acid with amines. Russ Chem Bull 43, 279–282 (1994). https://doi.org/10.1007/BF00695829
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DOI: https://doi.org/10.1007/BF00695829