Enhanced Stereocontrol in Disyndiotactic-specific Group Transfer Polymerization of Methyl Crotonate—Stereochemical Evidence of Group Transfer

DOI Web Site 被引用文献9件 参考文献50件
  • Ute Koichi
    Department of Chemistry, Graduate School of Engineering Science, Osaka University
  • Tarao Toshiyuki
    Department of Chemistry, Graduate School of Engineering Science, Osaka University
  • Kitayama Tatsuki
    Department of Chemistry, Graduate School of Engineering Science, Osaka University

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  • Enhanced Stereocontrol in Disyndiotactic-specific Group Transfer Polymerization of Methyl Crotonate-Stereochemical Evidence of Group Transfer

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Group transfer polymerization (GTP) of methyl crotonate was examined by using a ketene silyl acetal with tert-butyldimethylsilyl group in the presence of HgI2 and tert-butyldimethylsilyl iodide as a catalyst and a co-catalyst, respectively. Under optimized conditions, the GTP produced disyndiotactic polymers with narrow molecular weight distribution in quantitative yields. The trialkylsilyl group in the initiator components was found to exert control over the stereochemical process of the GTP; the bulky tert-butyldimethylsilyl group leads to the highest disyndiotacticity. The results provide a direct evidence for the transferring silyl group to be involved in the propagation steps in the GTP.

収録刊行物

  • Polymer Journal

    Polymer Journal 37 (8), 578-583, 2005

    The Society of Polymer Science, Japan

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