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On the mechanism of formation of 1,1-dimethylpyrazolin-3-oxides

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The primary product during the acylation of N,N-dimethylhydrazine with anhydrides ofα,β-unsaturated acids is the N,N-dimethylhydrazide of the acid, which at elevated temperatures rearranges to its tautomer — the corresponding 1,1-dimethylpyrazolin-3-oxide.

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Literature cited

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    T. A. Sokolova and L. A. Ovsyannikova, Dokl. Akad. Nauk SSSR,143, 140 (1962).

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    T. A. Sokolova, A. I. Kol'tsov, N. P. Zapevalova, and L. A. Ovsyannikova, Izv. Akad. Nauk SSSR, Ser. Khim., 1727 (1964).

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    N. P. Zapevalova and T. A. Sokolova, Izv. Akad. Nauk SSSR, Ser. Khim., 1442 (1965).

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    T. A. Sokolova, L. A. Ovsyannikova, and N. P. Zapevalova, Vysokomolek. Soed.,A10, 955 (1968).

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    T. A. Sokolova, I. N. Osipova, and L. A. Ovsyannikova, Zh. Organ. Khimii,3, 2252 (1967).

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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 917–918, April, 1970.`

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Ovsyannikova, L.A., Sokolova, T.A. On the mechanism of formation of 1,1-dimethylpyrazolin-3-oxides. Russ Chem Bull 19, 863–864 (1970). https://doi.org/10.1007/BF00867252

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  • Elevated Temperature
  • Anhydride