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Isolation and identification of 4-O-β-D-xylopyranosyl-L-arabinopyranose from peach gum polysaccharide. I

J. Rosík, J. Kubala, A. Kardošová, and V. Kováčik

Institute of Chemistry, Slovak Academy of Sciences. 809 37 Bratislava

 

Abstract:  Three neutral oligosaccharides were isolated from the hydrolyzate of peach gum polysaccharide. Their separation was accomplished on a cross-linked starch by elution with distilled water. We investigated only the disaccharide giving on hydrolysis D-xylose and L-arabinose and after reduction with sodium tetrahydroborate D-xylose and L-arabitol. 2,3,4- Tri-O-methyl- D-xylose and 2,3-di-O-methyl-L-arabinose were identified by paper chromatography in the hydrolyzate of the methylated disaccharide. Mass spectrometry showed that both D-xylose and L-arabinose were in pyranose form linked together by 1 -> 4 glycosidic bond. On the basis of optical rotation and infrared spectroscopy the glycosidic bond was assumed to be ß. Thus the studied disaccharide had the structure 4-0-ß-D-xylopyranosyl-L-arabinopyranose.

Full paper in Portable Document Format: 275a688.pdf

 

Chemical Papers 27 (5) 688–691 (1973)

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