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- Title
Ionic TEMPO in Ionic Liquids: Specific Promotion of the Aerobic Oxidation of Alcohols.
- Authors
Hirashita, Tsunehisa; Nakanishi, Makoto; Uchida, Tomoya; Yamamoto, Masakazu; Araki, Shuki; ArENds, Isabel W. C. E.; Sheldon, Roger A.
- Abstract
The main objective of this study was to design a recyclable TEMPO (2,2,6,6-tetramethylpiperidinyl- N-oxyl) derivative that could be used as a catalyst in an ionic liquid solvent for the aerobic oxidation of alcohols by using NaNO2 and HCl as co-catalysts. To this end, a TEMPO derivative bearing a quaternary ammonium group, [4-Bu2MeN-TEMPO][PF6] ( 1), was prepared. It was subsequently shown that this ionic TEMPO derivative is an efficient catalyst for the aerobic oxidation of a variety of primary and secondary alcohols. It exhibits a synergistic effect with ionic liquid solvents and readily outperforms analogous oxidations in methylene chloride. Moreover, the ionic TEMPO could be recycled five times with no loss of activity.
- Subjects
IONIC liquids; OXIDATION of chemical alcohols; CATALYSTS; SODIUM nitrites; HYDROCHLORIC acid
- Publication
ChemCatChem, 2016, Vol 8, Issue 16, p2704
- ISSN
1867-3880
- Publication type
Article
- DOI
10.1002/cctc.201600491