Heterogeneous Distribution of Amino Groups in Partially N-Acetylated Derivatives of Chitosan

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概要

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• Five derivatives of partially N-acetylated chitosan [degree of substitution (d.s.) for N-acetyl group: 0.05, 0.2, 0.4, 0.6 and 0.9] were prepared from chitosan by reaction with acetic anhydride (<1 mol GlcN). Each derivative was exhaustively oxidized with NaIO4, reduced with NaBH4and hydrolyzed with 0.5 n HC1by the conventional method. The reaction products were fractionated by gel chromatography using Bio-Gel P-2. Glycol aldehyde, meso-Qrythritol and a series of 2- acetamido-2-deoxy-β-D-glucopyranosyl(1 --[→4)-2-acetamido-2-deoxy-β-D-glucopyranosyl(1-]n→2)-D-erthritols were detected in the hydrolyzates of all these derivatives, regardless of low d.s. for Nacetyl groups. These results indicate that free amino groups were heterogeneously present in the partially N-acetylated chitosans because chitosan was heterogeneously N-acetylated under the present conditions.

• 社団法人 日本農芸化学会の論文

著者

• Hirano Shigehiro

  Department Of Agricultural Biochemistry And Biotechnology Tottori University

• Kondo Yotaro

  Department Of Agricultural Chemistry Faculty Of Agriculture Tottori University

• TSUNEYASU Shigeru

  Department of Agricultural Biochemistry, Tottori University

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