Abstract
The oxidation of 3,7-disubstituted hexahydroindazoles with potassium hexacyanoferrate(III) afforded previously unknown tetrahydro-2H-indazole derivatives. A novel ring contraction reaction leading to 2,3-diazaspiro[4.4]non-3-en-1-one derivatives was discovered. The product structure was proved by NMR spectroscopy, mass spectrometry, and X-ray analysis.
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Original Russian Text © V.N. Nuriev, I.A. Vatsadze, N.V. Sviridenkova, S.Z. Vatsadze, 2016, published in Zhurnal Organicheskoi Khimii, 2016, Vol. 52, No. 3, pp. 409–416.
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Nuriev, V.N., Vatsadze, I.A., Sviridenkova, N.V. et al. Synthesis of 3,7-disubstituted hexahydro- and tetrahydro-2H-indazoles from cross-conjugated dienones. Russ J Org Chem 52, 389–396 (2016). https://doi.org/10.1134/S1070428016030167
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DOI: https://doi.org/10.1134/S1070428016030167