Modification of Arabinogalactan Isolated from Larix sibirica Ledeb. into Sulfated Derivatives with the Controlled Molecular Weights
| Autor: | Vladislav A. Ionin, Angelina V. Miroshnikova, Aleksandr S. Kazachenko, Andrei M. Skripnikov, Noureddine Issaoui, Valentina S. Borovkova, Yuriy N. Malyar, Dmitriy V. Zimonin, A S Kazachenko, Natalia Yu. Vasilyeva |
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| Rok vydání: | 2021 |
| Předmět: |
gel permeation chromatography
Pharmaceutical Science Larix sibirica Ledeb Polysaccharide Analytical Chemistry Gel permeation chromatography chemistry.chemical_compound QD241-441 Sulfation Arabinogalactan Drug Discovery Sulfamic acid Organic chemistry Physical and Theoretical Chemistry chemistry.chemical_classification Molecular mass Organic Chemistry sulfation molecular weight distribution Polymer arabinogalactan chemistry Chemistry (miscellaneous) Molecular Medicine Molar mass distribution sulfated arabinogalactan optimization |
| Zdroj: | Molecules, Vol 26, Iss 5364, p 5364 (2021) Molecules Volume 26 Issue 17 |
| ISSN: | 1420-3049 |
| DOI: | 10.3390/molecules26175364 |
| Popis: | The process of sulfation of arabinogalactan—a natural polysaccharide from Larix sibirica Ledeb.—with sulfamic acid in 1,4-dioxane using different activators has been studied for the first time. The dynamics of the molecular weight of sulfated arabinogalactan upon variation in the temperature and time of sulfation of arabinogalactan with sulfamic acid in 1,4-dioxane has been investigated. It has been found that, as the sulfation time increases from 10 to 90 min, the molecular weights of the reaction products grow due to the introduction of sulfate groups without significant destruction of the initial polymer and sulfation products. Sulfation at 95 °C for 20 min yields the products with a higher molecular weight than in the case of sulfation at 85 °C, which is related to an increase in the sulfation rate however, during the further process occurring under these conditions, sulfation is accompanied by the destruction and the molecular weight of the sulfated polymer decreases. The numerical optimization of arabinogalactan sulfation process has been performed. It has been shown that the optimal parameters for obtaining a product with a high sulfur content are a sulfamic acid amount of 20 mmol per 1 g of arabinogalactan, a process temperature of 85 °C, and a process time of 2.5 h. |
| Databáze: | OpenAIRE |
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