4-Alkyloxazolidinedione. VI. The Polymerization of α-Amino Acid <I>N</I>-Carboxy Anhydride

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概要

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• The relationships between the polymerization solvents and the conformation of the polypeptides formed were studied on the basis of the infrared absorption spectra and the X-ray diffraction diagrams of the polymers. Poly-L-α-amino-<I>n</I>-butyric acid and poly-L-<I>n</I>-valine, prepared in dimethylsulfoxide (DMSO) as a polymerization solvent, formed β-conformation, but the respective polypeptides obtained in acetonitrile had an α-conformation. The conformational structure of poly-L-α-amino-<I>n</I>-butyric acid changed from β to α upon reprecipitation from a solution in dichloroacetic acid with ether. On the other hand, the conformational structure of poly-DL-α-amino-<I>n</I>-butyric acid did not change upon reprecipitation from a solution in formic acid and dichloroacetic acid.

• 公益社団法人 日本化学会の論文

著者

• Iwakura Yoshio

  Department of Synthetic Chemistry, Faculty of Engineering, The University of Tokyo

• Uno Keikichi

  Department of Synthetic Chemistry, Faculty of Engineering, The University of Tokyo

• Tomizawa Mayumi

  College of Technology, University of Gunma

• Oya Masanao

  College of Technology, University of Gunma

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• Cyclizations of Thioureas with a Hydroxy Group at the β-Position of the N-Substituent. I. Reaction with Cupric Acetate
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• The Polymerization of α-Amino Acid N-Carboxy Anhydride (4-Alkyl-oxazolidine-dione). IV. A Novel Synthesis of a Block Copolypeptide

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