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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1986 (1986), S. 1823-1836 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Stereoselektive intramolekulare Nitron-Cycloaddition bei der Synthese von Lasubin IIDie intramolekulare Cycloaddition α-substituierter N-Alkenylnitrone 2 führt zu den 7-Oxa-1-azanorbornanen 6, 7 und 8 mit einer Selektivität von ca. 80% zugunsten des exo,exo-disubstituierten Isomeren 6. Diese Verbindungen lassen sich leicht zu den all-cis-2,6-disubstituierten 4-Hydroxypiperidinen 4 reduzieren, die geeignete Edukte für die Synthese bestimmter Alkaloide sind. Dies wurde durch die Synthese von Lasubin II belegt
    Notes: The intramolecular cycloaddition of α-substituted N-alkenylnitrones 2 leads to the 7-oxa-1-azanorbornanes 6, 7, and 8 with a selectivity of ca. 80% in favor of the exo,exo-disubstituted compound 6. The latter can be reduced to give the all-cis-2,6-disubstituted 4-hydroxypiperidines 4 which are key compounds for the synthesis of certain alkaloids as demonstrated by the synthesis of lasubine II.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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