Journal
RSC ADVANCES
Volume 4, Issue 76, Pages 40161-40169Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra05598e
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Funding
- National Natural Science Foundation of China [21276061]
- Natural Science Foundation of Hebei Province, China [B2013202158]
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A novel deep eutectic solvent supported TEMPO (DES-TEMPO) composed of N,N-dimethyl-(4-(2,2,6,6-tetramethyl-1-oxyl-4-piperidoxyl)butyl)dodecyl ammonium salt ([Quaternium-TEMPO]Br-+(-)) and urea was prepared. An efficient catalytic system for the oxidation of alcohols with molecular oxygen as terminal oxidant has been developed from DES-TEMPO and Fe(NO3)(3)center dot 9H(2)O. The DES-TEMPO/Fe(NO3)(3) system showed good performances on the selective oxidation of various alcohols to the corresponding aldehydes and ketones under mild and solvent-free conditions. The DES could be recovered easily and recycled up to five times in the oxidation of benzyl alcohol without significant loss of catalytic activity.
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