Abstract
3-Cyano- and 3-(alkoxycarbonyl)spiro[2-pyrazoline-5,1’-cyclopropane] and 5-phenylspiro[1-pyrazoline-3,1’-cyclopropane] undergo unusual transformations into 3(5)-substituted 5(3)-(2-hydroperoxyethyl)pyrazoles in the presence of atmospheric oxygen. The conditions for the formation of hydroperoxides (e.g., in oxygen-saturated solutions of spiro[2-pyrazoline-5,1’-cyclopropanes] in CHCl3) and their conversion into (2-hydroxyethyl)pyrazoles or the corresponding nitrates under the action of nitrosating reagents were considered.
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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 2160–2164, October, 2004.
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Kostyuchenko, I.V., Okonnishnikova, G.P., Shulishov, E.V. et al. Unusual formation of hydroperoxides in the reactions of substituted spiro[pyrazolinecyclopropanes]. Russ Chem Bull 53, 2257–2261 (2004). https://doi.org/10.1007/s11172-005-0110-1
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DOI: https://doi.org/10.1007/s11172-005-0110-1