Selective cis-dihydroxylation of styrene derivatives using mesoporous silica catalyst
| Accession number;06A0720397 |
| Title;Selective cis-dihydroxylation of styrene derivatives using mesoporous silica catalyst |
| Author;ISHITANI HARURO(Tokyo Inst. Technol., Chemical Resources Lab., JPN) KADOMA HIROSHI(Tokyo Inst. Technol., Chemical Resources Lab., JPN) KAIZUKA KOSUKE(Tokyo Inst. Technol., Chemical Resources Lab., JPN) MATSUMOTO AKIHIRO(Tokyo Inst. Technol., Chemical Resources Lab., JPN) IWAMOTO MASAKAZU(Tokyo Inst. Technol., Chemical Resources Lab., JPN) |
Journal Title;Catalysts & Catalysis
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Journal Code:F0319A
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ISSN:0559-8958
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VOL.48;NO.6;PAGE.415-417(2006)
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| Figure&Table&Reference;FIG.3, TBL.3, REF.2 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Hydrations of various styrene oxide derivatives were investigated over mesoporous silica materials. Cis-/trans-selectivities of resulting vicinal diol were changed by addition of MCM-41, and cis-diols were selectively obtained in the presence of MCM-41 catalyst. Cis-/trans-selectivity of 1,2-cyclohexane diol derivatives yielded from hydration of 1-phenylcyclohexene oxide derivatives are strongly dependent on the electronic properties of substrates in homogeneous catalysis, while cis-diols of the respective substrates were selectively obtained in the present heterogeneous catalysis. The amount of water added and the kind of solvent were both important to attain high cis-selectivity. The highest cis-selectivity was attained at 20.MU.l mmol'-1' of water. The order of effective solvents for cis-selectivity was dichloromethane>toluene>ethyl acetate>acetone. (author abst.) |
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