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Neighboring group effect in the β-elimination-reaction of some glucopyranosyl-(1→4)-hexopyranosiduronates

✍ Scribed by J. Kiss

Publisher: Elsevier Science
Year: 1970
Tongue: French
Weight: 209 KB
Volume: 11
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(01)98133-x

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✦ Synopsis

The enzymic degradation of heparitin sulfate (l), chondroitin sulfates (2), hyaluronic acid (3) led to sulfated or sulfate free oligosaccharides with a terminally linked 4,5-unsaturated-4-deoxy-hexopyranosiduronate unit. These oligosaccharides proved to be similar to the fragmentation-products of lung-, intestines, and omega-heparins, which can be obtained by diazoalkane degradation (4). On the other hand, polyglycosiduronic acids, e.g. pectin (5) or alginic acid (6) give similar products by enzymic or alkaline degradation.

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