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Synfacts 2011(8): 0915-0915  
DOI: 10.1055/s-0030-1260710
Polymer-Supported Synthesis
© Georg Thieme Verlag Stuttgart ˙ New York

Aerobic Oxidation of Alcohols with Fe3O4/SiO2-Supported TEMPO in Water

Contributor(s): Yasuhiro Uozumi, Go Hamasaka
B. Karimi*, E. Farhangi
Institute for Advanced Studies in Basic Sciences, Zanjan, Iran
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Publikationsdatum:
20. Juli 2011 (online)

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Significance

Magnetic nanoparticle supported TEMPO (MNST) was prepared by mixing 4-oxo-TEMPO and silica-coated magnetite nanoparticles (AMNP), which were prepared by treatment of Fe3O4 nanomagnet with Si(OEt)4 followed by ­immobilization of (3-aminopropyl)triethoxysilane (eq. 1). MNST catalyzed the aerobic oxidation of alcohols 1 in the presence of t-BuONO in H2O under O2 (1 atm) to give the corresponding carbonyl compounds 2 in 61-100% GC yield (eq. 2, 32 examples).