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  • 1
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Components of the Green Deathcap Toadstool, Amanita phalloides, XLVII1). - Proamanullin, Amanullinic Acid, and Two Unidentified Derivatives of β-Amanitin; the Residual Members of the Amanitin FamilyThe isolation and maximal characterization of some members of the amanitin family is reported on, which occur only in minimal amounts in the methanolic extract of Amanita phalloides: Proamanullin 1b, a nontoxic compound contains proline instead of hydroxy-proline in amanullin (1a). The likewise nontoxic amanullinic acid 1c is converted into 1a by reaction with ammonia via a mixed anhydride. Two neutral, toxic derivatives of β-amanitin, X-1 and X-2, are most probably not amides but rather esters. X-1 forms a complex with borate, and therefore could possibly be an ester of β-amanitin with glycerol.
    Notes: Es wird über die Isolierung und soweit wie mögliche Charakterisierung einiger in winziger Menge im Methanolextrakt von Amanita phalloides enthaltenen Vertreter der Amanitinfamilie berichtet: Proamanullin 1b, eine ungiftige Komponente, enthält anstelle des Hydroxyprolins von Amanullin (1a) ein Prolin. Amanullinsäure 1c, ebenfalls ungiftig, läßt sich über das gemischte Anhydrid mit Ammoniak in 1a verwandeln. Zwei giftige neutrale Derivate des β-Amanitins, X-1 und X-2, sind sehr wahrscheinlich keine Amide, sondern Ester. X-1 bildet mit Borat einen Komplex; es könnte ein Glycerinester sein.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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