Asymmetric Hydrogenation with Modified Raney Nickel. II. Studies on Modified Hydrogenation Catalyst. III
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概要
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1) The asymmetric R-Ni catalysts were prepared by the treatment of R-Ni with various asymmetric compounds, and the asymmetric activity of a catalyst was measured by the hydrogenation of methyl acetoacetate<BR>2) Optical rotatory direction and power of the reduced product was affected both by the configuration and molecular size of amino acid which was used as modifying reagent.<BR>3) The asymmetric activity of catalysts treated with <I>N</I>-substituted amino acids, <I>N</I>-acyl, <I>N</I>-dimethyl and <I>N</I>-cyanoethyl derivatives of Glu and Asp, were much less than the activity of the catalyst treated with the corresponding amino acids.<BR>4) The asymmetric activity of the catalyst treated with D-tartaric acid and L-malic acid was tested at various conditions. The asymmetric yield in the hydrogenation of methyl acetoacetate in the presence of the catalyst treated with <I>d</I>-tartaric acid solution of pH 5.1∼5.2 at 100°C was about 45 percent.
- 社団法人 日本化学会の論文
著者
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Fukawa Hideaki
Division of Organic Chemistry Institute for Protein Research Osaka University
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Izumi Y.
Division of Organic Chemistry Institute for Protein Research Osaka University
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Imaida Masami
Division of Organic Chemistry Institute for Protein Research Osaka University
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Akabori Shiro
Division of Organic Chemistry Institute for Protein Research Osaka University
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