Asymmetric reactions. III. The asymmetric synthesis of methyl 2-phenylpropionate in the presence of chiral polymers.
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概要
- 論文の詳細を見る
The asymmetric addition of methanol to phenylmethylketene was carried out in the presence of a chiral polymer obtained by the co-polymerization of <I>N</I>-benzyl-2-pyrrolidinylmethyl acrylate with methyl acrylate. The products obtained for the above co-polymer showed a correlation between log<I>k</I><SUB>R</SUB>⁄<I>k</I><SUB>S</SUB> and 1⁄<I>T</I> deviating from linearity, while those for poly(<I>N</I>-benzyl-2-pyrroIidinylmethyl acrylate) exhibited a linear relationship. <I>N</I>-Benzyl-2-pyrrolidinylmethyl butyrate, hexanoate, and stearate were also used as catalysts; they showed asymmetric efficiencies intermediate between those of <I>N</I>-benzyl-2-pyrrolidinylmethyl propionate and poly(<I>N</I>-benzyl-2-pyrrolidinylmethyl acrylate). The use of several high- and low-molecular-weight catalysts derived from cinchonine was similarly attempted in order to examine the polymer effect with regard to the stereoselectivity.
- 公益社団法人 日本化学会の論文
著者
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Nakatani Noriyuki
Department Of Applied Physics Faculty Of Engineering Toyama University
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Yamashita Tetsushi
Department Of Chemistry Faculty Of Science Osaka City University
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Nakamura Nobuo
Department Of Cardiology Seiyu Memorial Hospital
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YASUEDA Hiroshi
Department of Clinical Research, National Sagamihara Hospital
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Nakatani Noriyuki
Department of Chemistry, Faculty of Science, Osaka City University
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Yasueda Hiroshi
Department of Chemistry, Faculty of Science, Osaka City University
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