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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 126 (1995), S. 647-652 
    ISSN: 1434-4475
    Keywords: Baeyer-Villiger oxidation ; Phase transfer catalysis ; Borax-H2O2 system
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung In Wasserstoffperoxid (30%) gelöstes Borax bildet Peroxyverbindungen, die durch Schütteln in die organische Phase zweiphasiger Systeme übergeführt werden können. Der Transferprozeß wird durch die Zugabe von katalytischen MengenBTEAC gefördert. Die zweiphasigen Systeme wurden zurBaeyer-Villiger — Oxidation einiger in Wasser unlöslicher Ketone eingesetzt und die Auswirkung der Variation verschiedener Parameter (z.B. Temperatur, Zeit, Menge an H2O2 etc.) untersucht. Unter dem Einfluß höherer Temperature (ca. 80°C) wurde vollständige Umsetzung innerhalb von 2–4 h erreicht. Die Ergebnisse zeigen, daß die genannte Reaktion unter geeigneten Bedingungen von synthetischem Wert zur Oxidation säureempfindlicher Ketone unter Verwendung billiger und leicht verfügbarer Reagenzien ist.
    Notes: Summary Borax forms peroxy species when dissolved in 30% hydrogen peroxide which can be transferred into the organic phase when biphase mixtures are agitated. The addition of a catalytic amount ofBTEAC promotes the transfer. This biphase system was used for theBaeyer-Villiger oxidation of several ketones insoluble in water. Effects of changing various parameters,e.g. temperature, time, amount of H2O2 etc. were investigated. At higher temperature (ca. 80°C), 100% conversion could be achieved in 2–4h. The results show that under appropriate conditions this reaction is of synthetic value for the oxidation of acid-sensitive ketones using inexpensive and easily available reagents.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    International urogynecology journal 9 (1998), S. 55-57 
    ISSN: 1433-3023
    Keywords: Female epispadias ; Incontinence
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Female incontinent episadias is a very rare congenital anomaly presenting in childhood. We report 2 cases of adults presenting with this anomaly. These were treated by total genitourinary reconstruction in a single stage using a combined perineal abdominal approach, with satisfactory results. We recommend this technique as the procedure of choice in adults presenting with this rare anomaly.
    Type of Medium: Electronic Resource
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