Тип публикации: статья из журнала

Год издания: 2023

Идентификатор DOI: 10.1002/slct.202302540

Ключевые слова: NMR spectroscopy, Sulfation in the melt, xylan, xylan sulfates

Аннотация: The synthesis of polysaccharide sulfates without harmful solvents used is a serious environmental problem. A method for the synthesis of xylan sulfate using the sulfamic acid–urea melt as a sulfating agent without solvents is proposed. The melt is prepared by heating the sulfamic acid–urea mixture with a molar ratio of 1 : 1 at a tПоказать полностьюemperature of 110 °C. This ratio allows significant reduction of side reactions, in particular, carbamation of xylan. Sulfation is carried out at temperatures of 110,115, 120, 125, and 130 °C. The maximum yield and degree of substitution (DSsulfate 1.40) are attained at atemperature of 115 °C. The proposed method makes it possible to synthesize xylan sulfate rapidly (for 0.5 h) and without contamination of the obtained product with toxic solvents, e. g., dimethyl sulfoxide, pyridine, etc. The composition and structure of initial and sulfated xylan are confirmed by FTIR, NMR, GC, and elemental analysis.

Журнал: ChemistrySelect

Выпуск журнала: Т. 8, № 34

Номера страниц: 202302540

ISSN журнала: 23656549

Место издания: Вайнхайм

• Levdansky Vladimir Alexandrovich (Institute of Chemistry and Chemical Technology, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences)
• Garyntseva Natalya Viktorovna (Institute of Chemistry and Chemical Technology, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences)
• Levdansky Alexander Vladimirovich (Institute of Chemistry and Chemical Technology, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences)

• Ядро РИНЦ (eLIBRARY.RU)