Conclusions
The reaction of gem-dichlorocyclopropanol with hydrazine and phenylhydrazine in the presence of crown ethers at 20‡C leads to the formation of the corresponding pyrazoles in yields up to 60%. Under analogous conditions, cis- and trans-chlorocyclopropanols and phenylhydrazine give N-phenylpyrazoline in 58% yield.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 1, pp. 231–233, January, 1985.
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Shostakovskii, S.M., Mochalov, V.N., Voropaeva, T.K. et al. Preparation of pyrazoles and pyrazolines by the reaction of chlorocyclopropanols with hydrazines in the presence of crown ethers. Russ Chem Bull 34, 218–220 (1985). https://doi.org/10.1007/BF01157367
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DOI: https://doi.org/10.1007/BF01157367