Abstract
2,2,5,5-Tetramethyl-4-phenyl-3-oxo-3λ5-imidazolin-1-yloxyl catalyzes oxidation of 2-isopropyl-1,3-dioxolane, 2-phenyl-1,3-dioxolane, 2-phenyl-4-chloromethyl-1,3-dioxolane, and 2-phenyl-1,3-dioxane with 15-crown-5 complexes of potassium chlorodiperoxochromate (KCrO5Cl·2C10H20O5) and potassium chlorochromate (KCrO3Cl·2C10H20O5). 2-Isopropyl-1,3-dioxolane is oxidized to the corresponding monoester in quantitative yield, and the 2-phenyl derivatives yield benzaldehyde. The spiro ketal, 2,2-pentamethylene-4-methyl-1,3-dioxane, is decomposed to cyclohexanone.
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Akbalina, Z.F., Kabal'nova, N.N., Zlotskii, S.S. et al. Oxidation of 1,3-Dioxacycloalkanes with Complexes of Potassium Chlorochromate and Chlorodiperoxochromate with 15-Crown-5, Catalyzed with 2,2,5,5-Tetramethyl- 4-phenyl-3-oxo-3λ5-imidazolin-1-yloxyl. Russian Journal of General Chemistry 72, 447–448 (2002). https://doi.org/10.1023/A:1015533921604
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DOI: https://doi.org/10.1023/A:1015533921604