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- W2389643060 abstract "Reaction of 2,2,6,6-tetramethylpiperidin-4-ol-N-oxyl(TEMPO) with 2-chloroacetyl chloride gave 4-chloroacetoxy-2,2,6,6-tetramethylpiperidine-N-oxyl. An ionic-liquid immobilized TEMPO(TEMPO-IL) was then obtained via the quaternization of 1-methyl-1H-imidazole with 4-chloroacetoxy-2,2,6,6-tetramethyl-piperidine-N-oxyl followed by ion exchange with KPF6. A selective and mild ionic-liquid immobilized TEMPO/CuCl catalyzed oxidation procedure of alcohols to the corresponding aldehydes and ketones with molecular oxygen in ionic liquid [bmim]PF6 was developed. Oxidation reactions of benzylic and allylic alcohols were completed in about 10 hours at 65 ℃ with a conversion of 99% and 80%~90% product yields. Oxidation reactions of aliphatic and heterocyclic alcohols were more difficult with low conversion and yield. The reaction was highly product-selective and in any case only aldehyde or ketone was formed. No carboxylic acid was detected. The solvent and catalyst were easily recovered and reused in the reaction. In the case of the oxidation of benzyl alcohol, the solvent and catalyst were recovered and reused for 6 times with no decreases of benzyl alcohol conversion and product yield." @default.
- W2389643060 created "2016-06-24" @default.
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- W2389643060 date "2007-01-01" @default.
- W2389643060 modified "2023-09-25" @default.
- W2389643060 title "Oxidation of Alcohols to Corresponding Aldehydes and Ketones with Molecular Oxygen Catalyzed by Task-Specific Ionic Liquid" @default.
- W2389643060 hasPublicationYear "2007" @default.
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