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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1981 (1981), S. 2372-2383 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Bevorzugte Konformationen von GlycosylalditenDie Kristallstrukturanalyse von 6-O-(α-D-Glucopyranosyl)-D-glucit (Isomaltit 1) zeigt die Glucose in normaler 4C1-Sesselkonformation mit einer abgewinkelten Glucitkette glycosidisch verknüpft, wobei der Mittelteil eine planare, in den pyranoiden Ring hineinreichende Zickzack-Kette bildet. Die vergleichende Bewertung der Konformations-Charakteristika von 1, dem D-Mannit-Analogen 2 sowie von (1 → 4)-verknüpften Analogen erlaubt  -  in Verbindung mit Jeffreys Alditol-Regeln und den Prinzipien des exo-anomeren Effekts  -  zuverlässige Voraussagen zur Konformation von Glycosylalditen im allgemeinen.
    Notes: Crystal structure analysis shows 6-O-(α-D-glucopyranosyl)-D-glucitol (isomaltitol 1) to have a bent glucitol chain linked to glucose in normal 4C1-chair form, the middle section forming a planar zigzag chain that extends into the pyranoid ring. Comparative assessment of the conformational features of 1, its D-mannitol analogue 2, and of some (1 → 4)-linked analogues allows  -  in combination with Jeffrey's alditol rules and the exo-anomeric effect principles  -  to predict with significant confidence the preferred conformations of glycosylalditols in general.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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