On the Beckmann Rearrangement in Liquid Sulfur Dioxide. I : Synthesis of ε-Caprolactam

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概要

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• The formation of ε-caprolactam from cyclohexanone oxime by the Beckmann rearrangement in liquid sulfur dioxide has been studied. When sulfuric anhydride SO_3 was used as a rearrangement reagent and the process was carried out at 20℃, the reaction proceeded stoichiometrically between the oxime and sulfuric anhydride, which approved of the mechanism of the Beckmann rearrangement proposed by Kuhara and Chapman, yielding 93.6 per cent of ε-caprolactam as maximum. The preparative method of using a small amount of the reagent and being conducted at room temperature without stirring will enable the lactam industry more economical. Other reagents for the rearrangement were also examined.

• 東北大学の論文

著者

• TOKURA Niichiro

  The Chemical Research Institute of Non-Aqueous Solutions

• TADA Ritsuro

  The Chemical Research Institute of Non-Aqueous Solutions

• Asami Ryuzo

  The Chemical Research Institute Of Non-aqueous Solutions

• Tokura Niichiro

  The Chemical Research Institute of Non-Aqueous Solution Tohoku University

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