Oligosaccharides methyl glycosides

The kinetics of alkaline degradation of methyl B-D-xylopyranoside and several oligosaccharide methyl glycosides based on wood xylans have been examined as models for the processes occurring in the... 

Separates monosaccharides and disaccharides. Especially useful for methyl glycosides and sugar alcohols. Gives good separation with mono-, di-, tri- and oligosaccharides. Used as second solvent after n-butanol/acetic acid/water (SG)... 

The separation of disaccharides and higher oligomers is not essentially different from the separation of monosaccharides, except that the volatility rapidly decreases with increasing molecular weight. Oligosaccharides may be transformed into volatile derivatives, commonly the trimethylsilyl ethers, either directly or after reduction. Other derivatives, such as trifluoroacetates, have been used, but the acetates have low volatility. Oligosaccharides are not usually converted into their methyl glycosides prior to trimethylsilylation. Detailed examples are listed in Table VII (see p. 130). 

Table XI. Glycosides of Oligosaccharides Containing Simple Aldohexoses. . 211 Table XII. Methyl Glycosides of Oligosaccharides Containing Galactose and...

The significance of methyl ethers for the GC analysis of sugars is emphasized by the fact that they are direct products of the methanolysis of oligosaccharides and glycosides. Methanolysis is often applied as a suitable alternative method for the cleavage of these substances prior to analysis, particularly in those instances when more stringent condi-... 

Vidadala SR, Hotha S (2009) Methyl glycosides are identified as glycosyl donors for the synthesis of glycosides, disaccharides and oligosaccharides. Chem Commun 18 2505-2507... 

Four other oligosaccharides (18-21, Fig. 6) corresponding to fragments of either the linear or the branched hexasaccharide moieties of the arabinan have been synthesized as methyl glycosides [55,74]. These were obtained in a maimer similar to the disaccharide and trisaccharide via glycosylation of methyl glycoside acceptors with thioglycoside donors. 

---