Abstract
5-Aryl-2-acylmethylene-2,3-dihydro-3-furanones are recyclized by the action of hydrazine hydrate with the formation of 3-substituted 6-aryl-1H-4-pyridazinones, 3-alkoxycarbonylacetyl-5-aryl-4-methylpyrazoles, or 5-aryl-3-(3-oxo-2,3-dihydro-1H-5-pyrazolyl) pyrazoles, depending on the structure of the starting materials and the ratio of the reactants. The last-named are also obtained by the hydrazinolysis of the known 2-alkoxycarbonylmethyl-2-hydroxy-1,5-diaryl-2,3-dihydro-3-pyrrolones.
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For Communication 6, see [1].
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1031–1038, August, 1992.
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Kuz'minykh, V.O., Igidov, N.M. & Andreichikov, Y.S. Chemistry of 2-methylene-2,3-dihydro-3-pyranones. Chem Heterocycl Compd 28, 861–867 (1992). https://doi.org/10.1007/BF00531315
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DOI: https://doi.org/10.1007/BF00531315