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  • General Chemistry  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Radical Cyclizations - Synthesis of γ-Lycorane (1999)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1999 (1999), S. 1925-1933 
    Details
    ISSN: 1434-193X
    Keywords: γ-Lycorane ; Radicals ; Cyclizations ; Natural products ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: (±)-γ-Lycorane has been synthesized in ten steps from piperonylic alcohol. Two radical reactions were used successively to build the D and B rings. A formal synthesis of (+)-γ-lycorane was achieved via an optically active unsaturated aldehyde intermediate.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 2
    Electronic Resource
    Electronic Resource
    Ring Expansion - Formation of Optically Active 3-Hydroxypiperidines from Pyrrolidinemethanol Derivatives (1999)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1999 (1999), S. 1693-1699 
    Details
    ISSN: 1434-193X
    Keywords: Pyrrolidines ; Piperidines ; Nitrogen heterocycles ; Rearrangements ; Aziridinium ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Treatment of pyrrolidinemethanol derivatives (-)-1, (-)-6, (-)-7, 8, (-)-9, (+)-10, (-)-11, and (-)-21 with trifluoroacetic anhydride and then with Et3N afforded, after hydrolysis of the trifluoroacetyl group with NaOH, the optically active 3-hydroxypiperidines (-)-14, (+)-15, (-)-16, 17, (+)-18, (-)-19, (-)-20, and (+)-22, respectively. The yields are good and the enantiomeric excess excellent (up to 95 %).
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
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