ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Acetolysis of a (4-O-methylglucurono)xylan. II. Characterization of the uronic acids-containing fraction of the acetolyzate

I. Šimkovic and A. Ebringerová

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

Abstract: Glycuronic and oligoglycuronic acids-contg. fraction of the acetolyzate of a (4-O-methylglucurono)xylan was fractionated by elution chromatog. on silica gel to yield some of its components as per-O-acetyl Me esters. The substances were characterized by mass spectrometry as such and as corresponding N-p-toluidyl glycosides, and identified by chromatog. (after deesterification and deacetylation). The presence in the acetolyzate of the following substances was confirmed: Me 1,2,3-tri-O-acetyl-4-O-methyl-α,β-D-glucopyranuronate, Me 1,2,3,4-tetra-O-acetyl-α,β-D-galactopyranuronate, 1,3,4-tri-O-acetyl-2-O-(Me 2,3-di-O-acetyl-4-O-methyl-α-D-glucopyranosyluronate)-α,β-D-xylopyranose, 1,2,3,3',4'-penta-O-acetyl-2'-O-(Me 2,3-di-O-acetyl-4-O-methyl-α-D-glucopyranosyluronate)-α,β-xylobiose and its positional isomer, namely 1,3,2',3',4'-penta-O-acetyl-2-O-(Me 2,3-di-O-acetyl-4-O-methyl-α-D-glucopyranosyluronate)-α,β-xylobiose.

Full paper in Portable Document Format: 352a263.pdf

Chemical Papers 35 (2) 263–269 (1981)