Conclusions
By1H and19F NMR spectroscopy it was shown that reaction of fluoroalkyl β-ketoesters with methylhydrazine in deuteromethanol at −30 to 30‡C involves intermediate formation of the β-ketoester salts with methylhydrazine and 3,5-dioxypyrazolidines which successively split off methanol and H2O with formation of 3-oxypyrazolines and pyrazol-5-ones, respectively.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 399–402, February, 1988.
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Saloutin, V.I., Kodess, M.I., Fomin, A.N. et al. Study of the reaction of fluoroalkyl β-ketoesters with methylhydrazine by1H and19F NMR spectroscopy. Russ Chem Bull 37, 318–321 (1988). https://doi.org/10.1007/BF00957434
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DOI: https://doi.org/10.1007/BF00957434