Selective formation of 2-phenylethanol in the homologation of benzyl alcohol.
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概要
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High selectivity of 2-phenylethanol (87%) in the homologation of benzyl alcohol was obtained with cobalt–ruthenium mixed catalyst. The formation of toluene as the major by-product was suppressed by adding water at low reaction temperature. Bromide as promoter was more effective for the homologation than chloride or iodide. From in situ IR observation, [Co(CO)<SUB>4</SUB>]<SUP>−</SUP>, which was active species for the homologation, was found to be produced by the dissociation of [CoH(CO)<SUB>4</SUB>] but not by the disproportionation of [Co<SUB>2</SUB>(CO)<SUB>8</SUB>] under the reaction temperature employed (120 °C). It was also revealed that ruthenium chloride as precatalyst was converted into a bromocarbonyl complex of ruthenium under the homologation conditions.
- 公益社団法人 日本化学会の論文
著者
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Kudo Kiyoshi
Institute For Chemical Research Kyoto University
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SUGITA Nobuyuki
Institute for Chemical Resaerch, Kyoto University
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Mori Sadayuki
Institute For Chemical Research Kyoto University
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Watanabe Kazuhiro
Institute Of Biological Science Nippon Paper Co. Ltd.
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