Abstract
The sulfation of arabinogalactan (AG) by sulfamic acid in the presence of urea in dioxane has been studied. The degree of AG sulfation increases as the sulfation temperature increases from 70 to 95°C. As indicated by 13C NMR spectroscopy, the sulfate groups in sulfated AG are in the C2 and C4 positions of the main galactan chain and the C6 position of the terminal galactose units of the main and the side chains of AG. The sulfation of AG by the complex sulfamic acid–urea in dioxane medium makes it possible to increase the ecological safety and the efficiency of the process compared with the known methods of sulfation.
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Abbreviations
- AG:
-
arabinogalactan
- SC:
-
sulfating complex
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Original Russian Text © N.Yu. Vasil’eva, A.V. Levdansky, B.N. Kuznetsov, G.P. Skvortsova, A.S. Kazachenko, L. Djakovitch, C. Pinel, 2014, published in Khimiya Rastitel’nogo Syr’ya, 2014, No. 1, pp. 87–95.
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Vasil’eva, N.Y., Levdansky, A.V., Kuznetsov, B.N. et al. Sulfation of arabinogalactan by sulfamic acid in dioxane. Russ J Bioorg Chem 41, 725–731 (2015). https://doi.org/10.1134/S1068162015070158
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DOI: https://doi.org/10.1134/S1068162015070158