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

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• 作者：Kyoko Mandai^a ; Minae Hanata^a ; Koichi Mitsudo^a ; Hiroki Mandai^a ; Seiji Suga^a ; ^{suga@cc.okayama-u.ac.jp" class="auth_mail" title="E-mail the corresponding author} ; Hideki Hashimoto^a ; ^b ; Jun Takada^a ; ^b
• 关键词：Iron oxide ; Oxidation ; Baeyer-Villiger oxidation ; Silicon ; Synergetic effect
• 刊名：Tetrahedron
• 出版年：2015
• 出版时间：16 December 2015
• 年：2015
• 卷：71
• 期：50
• 页码：9403-9407
• 全文大小：1220 K

文摘

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 Mössbauer 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.