Sulfation of polysaccharides with sodium pyrosulfate in dimethyl sulfoxide

Капуцкий, Ф. Н.; Torgashov, V. I.; Yurkshtovich, T. L.; Голуб, Н. В.; Ostrovskaya, I. L.; Alinovskaya, V. A.

doi:10.1134/s1070427207100308

Cited by 3 publications

(6 citation statements)

References 2 publications

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“…IR spectroscopy is a common method in the analysis of synthetic polysaccharide sulfates . Signals in the wavenumber ranges of 1270–1200 cm −1 ( ν (SO)) and 880–800 cm −1 ( ν (COS)) are usually utilized to confirm the presence of the sulfate groups in synthetically prepared compounds.…”

Section: Spectroscopic Analysis Of Polysaccharide Sulfatesmentioning

confidence: 99%

“…Due to these properties, the preparation of various synthetic polysaccharide sulfates has generated interest along with the utilization of natural compounds. Sulfate derivatives have been prepared from many starch species , cellulose , dextran , pullulan , curdlan , chitin , chitosan , pectin , and alginate . Furthermore, sulfation reactions have also been carried out on natural polysaccharide sulfates .…”

Section: Introductionmentioning

confidence: 99%

“…The number of sulfate substituents attached to a repeating unit of a polysaccharide has an impact on the chemical, physical, and biological properties of polysaccharide sulfates. Thus the determination of the degree of substitution (DS) or the sulfate content usually forms an essential part of the analysis of synthetically prepared polysaccharide sulfates . DS is also determined routinely for commercial carrageenans due to the limits imposed by the European Commission for the sulfate content of carrageenans used as food additives (15–40%) .…”

Section: Introductionmentioning

confidence: 99%

“…DS can be determined by various types of methods. For instance, NMR spectroscopy and potentiometric titration have been utilized in the analysis of synthetic polysaccharide sulfates. However, the most common approach is probably the determination of the sulfur content of the compound either by elemental analysis or through the acid hydrolysis of the sulfate esters with the subsequent precipitation of the formed inorganic sulfate with BaCl 2 .…”

Section: Introductionmentioning

confidence: 99%

“…Synthetic polysaccharide sulfates can be analyzed in a similar fashion as carrageenans. NMR and IR spectroscopy and HPLC are frequently used techniques. Structural analyses are used on one hand to confirm the attachment of sulfate groups to the polysaccharide chain, and on the other hand to study the possible side effects the reactions may have had on the structure of the compounds.…”

Section: Introductionmentioning

confidence: 99%

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Spectroscopic study of natural and synthetic polysaccharide sulfate structures

et al. 2016

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Sulfate-containing polysaccharides are a diverse group of natural products and many of them have shown biological activity. Therefore, a growing interest has focused on the chemical preparation of sulfated derivatives from common polysaccharides. The analysis of these complicated, synthetically prepared polysaccharide sulfates typically requires the utilization of several methods. NMR and IR spectroscopy are routinely used to follow the progress of the sulfation reactions and to confirm the presence of covalently bonded sulfate groups in the products.

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Section: Spectroscopic Analysis Of Polysaccharide Sulfatesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spectroscopic study of natural and synthetic polysaccharide sulfate structures

et al. 2016

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A mechanistic study of arabinigalactan sulfation with potassium persulfate in dimethyl sulfoxide

et al. 2017

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Structural Characterization of Chitin and Chitosan Obtained by Biological and Chemical Methods

et al. 2011

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Chitin production was biologically achieved by lactic acid fermentation (LAF) of shrimp waste (Litopenaeus vannameii) in a packed bed column reactor with maximal percentages of demineralization (D(MIN)) and deproteinization (D(PROT)) after 96 h of 92 and 94%, respectively. This procedure also afforded high free astaxanthin recovery with up to 2400 μg per gram of silage. Chitin product was also obtained from the shrimp waste by a chemical method using acid and alkali for comparison. The biologically obtained chitin (BIO-C) showed higher M(w) (1200 kDa) and crystallinity index (I(CR)) (86%) than the chemically extracted chitin (CH-C). A multistep freeze-pump-thaw (FPT) methodology was applied to obtain medium M(w) chitosan (400 kDa) with degree of acetylation (DA) ca. 10% from BIO-C, which was higher than that from CH-C. Additionally, I(CR) values showed the preservation of crystalline chitin structure in BIO-C derivatives at low DA (40-25%). Moreover, the FPT deacetylation of the attained BIO-C produced chitosans with bloc copolymer structure inherited from a coarse chitin crystalline morphology. Therefore, our LAF method combined with FPT proved to be an affective biological method to avoid excessive depolymerization and loss of crystallinity during chitosan production, which offers new perspective applications for this material.

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Sulfation of polysaccharides with sodium pyrosulfate in dimethyl sulfoxide

Cited by 3 publications

References 2 publications

Spectroscopic study of natural and synthetic polysaccharide sulfate structures

Spectroscopic study of natural and synthetic polysaccharide sulfate structures

A mechanistic study of arabinigalactan sulfation with potassium persulfate in dimethyl sulfoxide

Structural Characterization of Chitin and Chitosan Obtained by Biological and Chemical Methods

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