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Aldobiouronic acids obtained from gum polysaccharides of the Prunus genus trees. V. Infrared spectroscopy

J. Rosík, A. Kardošová, and J. Kubala

Institute of Chemistry, Slovak Academy of Sciences, 809 33 Bratislava

 

Abstract:  Infrared spectra of three aldobiouronic acids: 6-0-β-D-glucuronopyranosyl- -D-galactose, 2-0-β-D-glucuronopyranosyl-D-mannose, and 6-0-(4-0-methyl- -ß-DTglucuronopyranosyl)-D-galactose and of their methyl (methyl glycosid)- uronates were recorded and absorption bands in the 900 —700 cm-1 range interpreted. The identified absorption bands at 935 — 925, 890 — 875, and 785 —780 cm-1 were assigned to the reducing end in the aldobiouronic acids. This conclusion was confirmed also by the strong band at 830 cm-1 in the spectra of methyl (methyl glycosid)uronates of all three aldobiouronic acids where the influence of α  anomer became evident. The absorption bands in the region of 810 — 800 cm-1 can be assigned to β-glycosidic bonds between the uronic acid residue and the hexose unit.

Full paper in Portable Document Format: 274a551.pdf

 

Chemical Papers 27 (4) 551–553 (1973)

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