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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1987 (1987), S. 467-468 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Scorpiolide, A New Type of Sesquiterpene Lactone from Vernonia scorpioidesAerial parts of Vernonia scorpioides afforded in addition to the known 4α,5β-epoxy-4,5-dihydrovernonallenolide (1) the glaucolide scorpiolide (2) as well as a germacranolide with a carboxylic acid group (4). The structures were determined by high-field NMR spectroscopy. The observed Cotton effect affords the absolute configuration of 2. Accordingly, the proposed absolute configuration of the large group of glaucolides is very likely.
    Notes: Oberirdische Teile von Vernonia scorpioides liefern neben dem bereits bekannten 4α,5β-Epoxy-4,5-dihydrovernonallenolid (1) das Glaucolid Scorpiolid (2) sowie ein Germacranolid mit einer Carbonsäuregruppe (4). Die Strukturen werden durch Hochfeld-NMR-Spektroskopie geklärt. Der beobachtete Cotton-Effekt liefert die absolute Konfiguration von 2. Daher ist auch die vermutete absolute Konfiguration der großen Gruppe der Glaucolide sehr wahrscheinlich.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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