Studies on chitin. 14. N-acetylation behavior of chitosan with acetyl chloride and acetic anhydride in a highly swelled state.
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概要
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<I>N</I>-Acetylation on chitosan has been studied in a highly swelled state with acetyl chloride in comparison with that with acetic anhydride under various conditions to establish the general possibility and scope of the acylation reactions on chitosan and other polysaccharides. A highly swelled chitosan precipitate prepared by pouring a chitosan solution in aqueous acetic acid/methanol into pyridine is quite suitable for efficient modifications, and the reaction with either acylating reagent proceeded smoothly and reproducibly under mild conditions. Although acetic anhydride is generally more appropriate in protic solvens, acetyl chloride is effective and advantageous especially in pyridine containing only small amounts of protic solvents.
- 公益社団法人 日本化学会の論文
著者
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KURITA Keisuke
Department of Industrial Chemistry, Faculty of Engineering, Seikei University
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Kurita Keisuke
Department Of Applied Chemistry Faculty Of Engineering Seikei University
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Koyama Yoshiyuki
Department Of Home Economics Otsuma Women's University
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Chikaoka Satoyuki
Department of Industrial Chemistry, Faculty of Engineering, Seikei University
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Kamiya Mami
Department of Industrial Chemistry, Faculty of Engineering, Seikei University
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Koyama Yoshiyuki
Department of Industrial Chemistry, Faculty of Engineering, Seikei University
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- Studies on chitin. 14. N-acetylation behavior of chitosan with acetyl chloride and acetic anhydride in a highly swelled state.