Abstract
1-Acetyl-5-hydroxyl-2-isopropyl(phenyl)pyrazolidines, as well as 1-hydroxyperhydropyrazolo[1,2-a]-4H-pyridazine-5,8-dione, react readily with alkyl-, aryl-, and acylhydrazines and hydroxylamine to give the corresponding products of substitution of the OH group, which, depending on the nature of the hydrazine, exist in the linear β-hydrazidohydrazone (oxime) form or in the form of a cyclic tautomer, viz., the corresponding 1-acetyl-5-hydrazinopyrazolidine.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1238–1241, September, 1985.
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Zelenin, K.N., Golubeva, G.A., Afanas'eva, S.V. et al. 1-Acyl-5-hydrazinopyrazolidines and their ring-chain tautomerism. Chem Heterocycl Compd 21, 1031–1034 (1985). https://doi.org/10.1007/BF00515030
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DOI: https://doi.org/10.1007/BF00515030