Asymmetric Polymerization of Isocyanates with Optically Active Anionic Initiators.

• Okamoto Yoshio

  Department of Applied Chemistry, Faculty of Engineering, Nagoya University

• Matsuda Masashi

  Department of Applied Chemistry, Faculty of Engineering, Nagoya University

• Nakano Tamaki

  Department of Applied Chemistry, Faculty of Engineering, Nagoya University

• Yashima Eiji

  Department of Applied Chemistry, Faculty of Engineering, Nagoya University

抄録

Anionic polymerization of 3-phenylpropyl, 4-phenylbutyl, and butyl isocyanates was carried out with chiral anionic initiators such as tert-butyllithium-(−)-sparteine complex (t-BuLi-(−)-Sp), lithium (−)-menthoxide, and (+)-1-(2-pyrrolidinylmethyl)pyrrolidine lithium amide. The t-BuLi-(−)-Sp did not afford optically active polymers. However, the alkoxide and amide gave optically active polymers for 4-phenylbutyl and butyl isocyanates. The optical activities are probably based on the prevailing helicity of the polymer chains induced by chiral initiator residues attaching to an α-end group of the polymer chain. The optical rotation of the polymers depended greatly on molecular weight and temperature.

収録刊行物

• Polymer Journal

  Polymer Journal 25 (4), 391-396, 1993

  The Society of Polymer Science, Japan

キーワード

• Polyisocyanate
• Anionic Polymerization
• Helix
• Optically Active Polymer
• ω-Phenylalkyl Isocyanate

詳細情報

• CRID: 1390282681266828160
• NII論文ID: 130004429438
• DOI: 10.1295/polymj.25.391
• COI: 1:CAS:528:DyaK3sXksV2qt7w%3D
• ISSN: 13490540
• ISSN: 00323896
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可