Abstract
Treatment of the ethyl esters of 1-R-4-chloro-2-oxo-1,2-dihydroquinoline-3-carboxylic acids with zinc dust in glacial acetic acid gives high yields of diethyl 2,2′-dioxo-1,2,3,4,1′,2′,3′,4′-octahydro[4,4′]biquinolinyl-3,3′-dicarboxylates. The structural features of the synthesized compounds together with their NMR and mass spectra are discussed.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1799–1807, December, 2007.
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Ukrainets, I.V., Tkach, A.A., Kravtsova, V.V. et al. 4-Hydroxy-2-quinolones 137. Synthesis, structure, and spectroscopic characteristics of diethyl 2,2′-dioxo-1,2,3,4,1′,2′,3′,4′-octahydro[4,4′]biquinolinyl-3,3′-dicarboxylate. Chem Heterocycl Comp 43, 1525–1531 (2007). https://doi.org/10.1007/s10593-007-0236-1
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DOI: https://doi.org/10.1007/s10593-007-0236-1