ГИДРОЛИЗ ИНУЛИНА В ПРИСУТСТВИИ ЙОДА

МУЛЛАГИЛЬДИНА, К.И.; ИВАНОВ, С.П.; КОНКИНА, И.Г.; ЛОБОВ, А.Н.; ДАУТОВА, Л.А.; КОЗЛОВ, В.Н.; МАКСЮТОВ, Р.Р.; МУРИНОВ, Ю.И.; ФАЙЗРАХМАНОВ, И.С.; Mullagildina, K.I.; Ivanov, S.P.; Konkina, I.G.; Lobov, A.N.; Dautova, L.A.; Kozlov, V.N.; Maxytov, R.R.; Murinov, Yu. I.; Fayzrakhmanov, I.S.

ГИДРОЛИЗ ИНУЛИНА В ПРИСУТСТВИИ ЙОДА

МУЛЛАГИЛЬДИНА, К.И., ИВАНОВ, С.П., КОНКИНА, И.Г., ЛОБОВ, А.Н., ДАУТОВА, Л.А., КОЗЛОВ, В.Н., МАКСЮТОВ, Р.Р., МУРИНОВ, Ю.И., ФАЙЗРАХМАНОВ, И.С.

Дата публикации: 2019

DOI: 10.33184/bulletin-bsu-2019.3.3

Аннотация:

Методом 13С ЯМР спектроскопии показано, что в водно-спиртовых растворах в присутствии молекулярного йода происходит гидролиз инулина с образованием смеси a- и b- изомеров D-глюкозы и D-фруктозы.

ключевые слова:
ИНУЛИН, ЙОД, ГИДРОЛИЗ, 13С ЯМР СПЕКТРОСКОПИЯ, ВАК

Издатель: Башкирский государственный университет

Тип: Article

УДК: 547.317:543.429.23

INULIN HYDROLYSIS IN THE PRESENCE OF IODINE

Mullagildina, K.I., Ivanov, S.P., Konkina, I.G., Lobov, A.N., Dautova, L.A., Kozlov, V.N., Maxytov, R.R., Murinov, Yu. I., Fayzrakhmanov, I.S.

Publication date: 2019

DOI: 10.33184/bulletin-bsu-2019.3.3

Abstract:

Inulin (In) is actually important natural ingredient used in food and pharmaceutical industry because of its diversified technological and functional properties. Hydrolysis of In makes it possible to obtain demanded mono- and oligosaccharides, valuable reagents for chemical synthesis, components of biofuel. This aspect of the study is also relevant for determining the range of stability of poly- and oligosaccharides. Earlier, the authors of the study synthesized iodine compounds with macromolecules of a sample of inulin from Heliánthus tuberósus (degree of polymerization 8), in order to study the delivery of this essential trace element to the human body as part of food. In the course of the study, it was found that change of interaction conditions leads to not only complexation, but also to a hydrolytic cleavage. In this paper, the authors provide confirmation of this fact. The hydrolysis reaction at molar ratio of reagents of 1:1 was carried out directly in deuterated solvents (D2O:CD3OD = 1:1) in order to monitor the course of the reaction by NMR spectroscopy in real time. The observation was carried out for 6 weeks. In the 13С NMR spectrum of the reaction mixture of In with iodine, the appearance of new signals in the anomeric range of 92-104 ppm is observed: in the region of 97 ppm the signal of the nucleus of the C(2) β-glucose atom appears, in the region of 99 ppm - C(2) signal of free α-fructose, at 103 ppm - C(2) β-fructose, at 93.7 - C(2) α-glucose. Thus, it was shown, that the hydrolytic cleavage of In in the presence of iodine in aqueous-alcoholic solutions is observed with the formation of anomeric forms of glucose and fructose.

Keywords:
INULIN, IODINE, HYDROLYSIS, NMR SPECTROSCOPY

Издатель: Башкирский государственный университет

Тип: Article

УДК: 547.317:543.429.23

ГИДРОЛИЗ ИНУЛИНА В ПРИСУТСТВИИ ЙОДА

INULIN HYDROLYSIS IN THE PRESENCE OF IODINE

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