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- Title
Effect of an Ionic Liquid on the Catalytic Performance of Thiocyanatodioxomolybdenum(VI) Complexes for the Oxidation of Cyclooctene and Benzyl Alcohol.
- Authors
Monteiro, Bernardo; Gago, Sandra; Neves, Patrícia; Valente, Anabela A.; Gonçalves, Isabel S.; Pereira, Cláudia C. L.; Silva, Carlos M.; Pillinger, Martyn
- Abstract
The complexes (PPh4)2[MoVIO2(NCS)4] ( 1), MoVIO2(NCS)2(di- tBu-bipy) ( 2) and MoO5(NCS)2(di- tBu-bipy)2 ( 3) (di- tBu-bipy = 4,4′-di- tert-butyl-2,2′-bipyridine) were studied as catalyst precursors for the oxidation of cyclooctene (Cy8) and benzyl alcohol (BzOH), using either dimethyl sulfoxide (DMSO) or tert-butyl hydroperoxide (TBHP) as oxidant. By dissolving complex 2 in the room temperature ionic liquid 1-butyl-3-methylpyridinium tetrafluoroborate, the catalytic performance with TBHP was improved (higher selectivity to the aldehyde and higher Cy8 conversions). For Cy8 oxidation, the unreacted substrate and products were easily extracted with n-hexane, and the ionic phase containing the catalyst could be reused without loss of catalytic performance.
- Subjects
IONIC liquids; CATALYSTS; OXIDATION; DIMETHYL sulfoxide; OXIDIZING agents; ALDEHYDES
- Publication
Catalysis Letters, 2009, Vol 129, Issue 3/4, p350
- ISSN
1011-372X
- Publication type
Article
- DOI
10.1007/s10562-009-9869-2