Journal
JOURNAL OF PORPHYRINS AND PHTHALOCYANINES
Volume 12, Issue 2, Pages 94-100Publisher
WORLD SCI PUBL CO INC
DOI: 10.1142/S1088424608000121
Keywords
Baeyer-Villiger oxidation; metalloporphyrin; ketone; dioxygen
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Efficient selective oxidation of ketones to lactones by molecular oxygen with benzaldehyde as an oxygen acceptor, in the presence of metalloporphyrins, has been reported. Iron(III) meso-tetraphenylporphyrin chloride (Fe(TPP)Cl) showed excellent activity and selectivity for oxidation of cyclohexanones under mild conditions. Moreover, different factors influencing ketones oxidation, e.g. catalyst, solvent, temperature and additive, have been investigated. The turnover number (TON) of the Fe(TPP)Cl catalyst could reach up to 71000 in a large scale oxidation of cyclohexanone. A plausible mechanism of ketone oxidation by molecular oxygen in the presence of metalloporphyrins and benzaldehyde was proposed. Copyright (C) 2008 Society of Porphyrins & Phthalocyanines.
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