Bacteriogenic iron oxide as an effective catalyst for Baeyer-Villiger oxidation with molecular oxygen and benzaldehyde

Autor:	Minae Hanata, Jun Takada, Koichi Mitsudo, Kyoko Mandai, Hideki Hashimoto, Hiroki Mandai, Seiji Suga
Rok vydání:	2015
Předmět:	Silicon Chemistry Organic Chemistry Inorganic chemistry Iron oxide Cyclohexanone chemistry.chemical_element Biochemistry Baeyer–Villiger oxidation Catalysis Benzaldehyde chemistry.chemical_compound Oxidation state Drug Discovery Mössbauer spectroscopy
Zdroj:	Tetrahedron. 71:9403-9407
ISSN:	0040-4020
DOI:	10.1016/j.tet.2015.10.057
Popis:	Iron oxide produced by iron-oxidizing bacteria, Leptothrix ochracea, (L-BIOX) obtained from a freshwater purification plant, Joyo City in Kyoto, Japan catalyzed Baeyer-Villiger oxidation with molecular oxygen in the presence of benzaldehyde at 25 °C more efficiently than usual iron compounds. L-BIOX can promote the reactions of various substrates to give the desired products in sufficient yields and was found to be reusable. Scanning transmission electron microscopy and 57Fe Mossbauer spectroscopy revealed that no change of the surface structure of L-BIOX was observed even after four times of the recycling test and the oxidation state of iron in L-BIOX is trivalent before and after the oxidation of cyclohexanone. An investigation with analogous amorphous iron oxides which contain silicon revealed that the catalytic activity of L-BIOX might stem from a synergetic effect of iron and silicon in the structure.
Databáze:	OpenAIRE
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