Conclusions
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1.
The reactions of 1,1-dimethylhydrazine with α, β-unsaturated acid anhydrides and chlorides were studied.
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2.
In these reactions two isomeric compounds are formed; the 2,2-dimethylhydrazide of the corresponding acid and a 1,1-dimethylpyrazolinium 3-oxide [3-hydroxy-1,1-dimethyl-2-pyrazolinium hydroxide inner salt.
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3.
Methacrylic and crotonic 2,2-dimethylhydrazides, 1,1-dimethylpyrazolinium 3-oxide, 1,1,4-trimethylpyrazolinium 3-oxide, 1,1,5-trimethylpyrazolinium 3-oxide, and also the hydrochlorides, methiodides, and picrates derived from these compounds were prepared and characterized for the first time.
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N. P. Zapevalova, T. A. Sokolova, N. M. Bazhenov and A. I. Kol'tsov, Dokl. AN SSSR150, 551 (1963).
N. P. Zapevalova, Dissertation [in Russian], Leningrad (1965).
T. A. Sokolova, A. I. Kol'tsov, N. P. Zapevalova and L. A. Ovsyannikova, Izv. AN SSSR. Ser. khim. 1727 (1964).
A. I. Kol'tsov, Izv. AN SSSR. Ser. khim. 1350 (1965).
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Translated from Izvestiya Akadeemii Nauk SSSR, Seriya Khimicheskaya, No. 8, pp. 1442–1447, August, 1965 Original article submitted June 25, 1963
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Zapevalova, N.P., Sokolova, T.A. Reaction of 1, 1-disubstituted hydrazines with derivatives of α, β-unsaturated aids Communication 1. Formation of 1, 1-dimethylpyrazolinium 3-oxides [3-hydroxy-1, -1dimethyl-2-pyrazolinium hydroxide inner salts]. Russ Chem Bull 14, 1398–1404 (1965). https://doi.org/10.1007/BF00846199
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DOI: https://doi.org/10.1007/BF00846199