Reaction of ε- Caprolactone with Alkali Cyanide

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  • TAN Kazuo
    Department of Chemical Process Engineering, Faculty of Engineering, Hokkaido University
  • MATSUDA Toshio
    Department of Chemical Process Engineering, Faculty of Engineering, Hokkaido University
  • TAKADA Yoshiyuki
    Department of Chemical Process Engineering, Faculty of Engineering, Hokkaido University

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Other Title
  • ε-力プロラクトンとシアン化アルカリの反応
  • イプシロン-カプロラクトン ト シアンカ アルカリ ノ ハンノウ

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6-Cyanohexanoic acid was prepared by the reaction of ε-caprolactone with alkali cyanide in the presence of a certain catalyst.<BR>As the catalyst of this reaction, KI, NaI, I2 and NH4I, gave good results. The highest yield of the acid was 65%.<BR>ε-Caprolactone polymer reacted in the same manner as the monomer, but its cyclic dimer gave the cyano acid in only 35% yield.<BR>5-Hexenoic acid and pimelonitrile were obtained as by-products.

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