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  • 1
    Electronic Resource
    Electronic Resource
    Chemie der Ginkgolide, I. 10-Acetyl-1-methoxycarbonyl-2,3,14,15,16-pentanorginkgolid A, ein Zwischenprodukt zur Herstellung von Bilobalid (1986)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1986 (1986), S. 1057-1066 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chemistry of Ginkgolides, I. - 10-Acetyl-1-methoxycarbonyl-2,3,14,15,16-pentanorginkgolide A, an Intermediate for the Synthesis of BilobalideThe title compound 8b, an intermediate of the intended partial synthesis of bilobalide (10) is obtained by degradation of ginkgolide A (1). The X-ray structural analysis of 14,15,16-trinorginkgolide A (7) confirms the structure of the rings B - E of the ginkgolides.
    Notes: Die Titelverbindung 8b, ein Zwischenprodukt der beabsichtigten Partialsynthese von Bilobalid (10), wird durch Abbau von Ginkgolid A (1) gewonnen. Durch Röntgenstrukturanalyse von 14,15,16-Trinorginkgolid A (7) wird die Struktur der Ringe B - E der Ginkgolide bestätigt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198619860610
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  • 2
    Electronic Resource
    Electronic Resource
    Chemie der Ginkgolide, II. Isolierung und Strukturaufklärung eines neuen Ginkgolids (1987)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1987 (1987), S. 521-526 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chemistry of Ginkgolides, II. - Isolation and Structural Elucidation of a New GinkgolideFrom leaves of the Ginkgo tree a new ginkgolide (5) is isolated which we name ginkgolide J. The structural elucidation was achieved by spectroscopic methods as well as by chemical correlation to ginkgolide C.
    Notes: Aus Blättern des Ginkgo-Baumes wird ein neues Ginkgolid (5) isoliert, das wir als Ginkgolid J bezeichnen. Die Strukturaufklärung gelang sowohl mit spektroskopischen Methoden als auch durch chemischen Korrelation mit Ginkgolid C.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198719870368
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Chemie der Ginkgolide, III. Bilobalid/iso-Bilobalid - Strukturbeweis durch Röntgenbeugung (1987)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1987 (1987), S. 1079-1085 
    Details
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chemistry of Ginkgolides, III. - Bilobalide/iso-Bilobalide - Structure Determination by X-ray AnalysisBilobalide (1a) shows remarkable biological effects and uncommon chemical properties. Its striking characteristic is the tendency to isomerize under mild acylation conditions to yield the diacyl derivatives 2e-g of the spiro compound 2a. The structures of bilobalide (1a) and 10,12-di-O-pivaloyl-iso-bilobalide (2f) are determined by X-ray analysis.
    Notes: Bilobalid (1a) zeigt auffallende biologische Wirkungen und ungewöhnliche chemische Eigenschaften. Ausgeprägt ist seine Tendenz, unter gelinden Acylierungsbedingungen zu den Diacyl-Derivaten 2e-g der Spiro-Verbindung 2a zu isomerisieren. Die Strukturen von Bilobalid (1a) und 10,12-Di-O-pivaloyl-iso-bilobalid (2f) werden durch Röntgenbeugung bewiesen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jlac.198719870876
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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