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  • Wiley-Blackwell  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 56 (1973), S. 557-560 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The title compounds 6 and 7 have been prepared from a natural occurring PG-A2 derivative. The structure and configuration of these novel prostaglandins are deduced from their mode of preparation and from their spectroscopic properties.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of 7-Fluoro-B-homo-steroids7β-Fluoro-B-homo-steroids are shown to be much more stable than their 7β-chloro-analogs previously studied. Aromatization of ring A under various conditions occurs without rearrangement of the carbon skeleton and even without loss of the 7β-fluorine atom. Whilst treatment of 7β-fluoro-B-homo-estranone compounds with lithium aluminum hydride in ether or tetrahydrofuran leads to the corresponding alcohols, the 7β-fluorine atom is eliminated in diglyme solution at reflux temperature. Catalytic hydrogenation of the Δ5(10)-bond leads to dihydro compounds, shown to be identical with the 5β,10β-derivatives obtained by reduction of the double-bound in Δ4-3-keto-10βH-B-homo compounds through lithium in ammonia.
    Notes: 7β-Fluor-B-homo-Steroide erweisen sich stabiler als die früher untersuchten 7β-Chlor-Analoga. Aromatisierung des Ringes A unter verschiedenen Bedingungen erfolgt ohne Umlagerung des Kohlenstoff-Gerüsts und ohne Verlust des 7β-Fluor-Atoms. Während 7β-Fluor-B-homoöstran-on-Verbindungen mit Lithiumalanat in Äther oder Tetrahydrofuran den entsprechenden Alkohol ergeben, wird das 7β-Fluor-Atom in siedendem Diglyme eliminiert. Katalytische Hydrierung der Δ5(10)-Bindung führt zu Dihydro-Verbindungen, welche mit den 5β.10β-Derivaten identisch sind, die durch Reduktion der Doppelbindung in Δ4-3-Keto-10βH-B-homo-Verbindungen mit Lithium in flüssigem Ammoniak erhalten werden.
    Type of Medium: Electronic Resource
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