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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 120 (1989), S. 899-906 
    ISSN: 1434-4475
    Keywords: Borane-ammonia complex ; Ruthenium tetroxide ; Sialic acids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die leicht zugänglichen Neuraminsäurederivate1 und7 werden mittels RuO4 in die Ketone2 und8 umgewandelt, welche mit dem Ammoniak-Boran-Komplex diastereoselektiv zu den entsprechenden 4- und 8-Epimeren4 a und10 reduziert werden. Anschließende Deblockierungsschritte führen zu den Titelverbindungen5 und12. Diese Synthesewege sind für den Grammaßstab ausgearbeitet worden.
    Notes: Summary Readily available Neu5Ac derivatives1 and7 are oxidized by RuO4 to the ketones2 and8 which are reduced diastereoselectively by the borane-ammonia complex to yield the4- and 8-epimers4a and10. Subsequent deprotection leads to the title compounds5 and12. This few step procedure is also applicable on gram scale.
    Type of Medium: Electronic Resource
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