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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1984 (1984), S. 1288-1297 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Building Units of Oligosaccharides, LIII. - Synthesis of Trisaccharides Containing 3-Deoxy-D-manno-2-octulosonic Acid (KDO)The disaccharide 9 consisting of two glucosamine units reacts with the pyranosyl bromide of 3-deoxy-D-manno-2-octulosonic acid (KDO) 11 to give the KDO-containing trisaccharides 12 and 14 of which the α-glycosidically linked isomer 12 is the most preponderant product. In a series of deblocking steps the free trisaccharide α-KDO-(2→3)-β-D-GlcNAc-(1→6)-D-GlcNAc 18 could be obtained from 12. The assignment to the α-glycosidic linkage of the KDO unit in 12 has been established by converting 19 into the lactone 20.
    Notes: Durch Umsetzung des aus zwei Glucosamin-Einheiten bestehenden Disaccharides 9 mit dem Pyranosylbromid der 3-Desoxy-D-manno-2-octulosonsäure (KDO) 11 sind die KDO-haltigen Trisaccharide 12 und 14 zu erhalten, von denen das α-glycosidisch verknüpfte Produkt 12 sehr stark überwiegt. Durch eine Entblockierungssequenz ist aus 12 das freie Trisaccharid α-KDO-(2→3)-β-D-GlcNAc-(1→6)-D-GlcNAc 18 zu gewinne. Die Zuordnung zur α-glycosidischen Verknüpfung des KDO-Teiles in 12 erfolgte durch Überführung von 19 in das Lacton 20.
    Type of Medium: Electronic Resource
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