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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatshefte für Chemie 128 (1997), S. 79-83 
    ISSN: 1434-4475
    Keywords: Allylic rearrangement ; Tetrabromoacetone ; 9,10-Dimethoxy-9,10-propanoanthracen-12-ones ; Ring contraction ; Molecular mechanics calculations (MM2)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung UnterFavorskii-Bedingungen (MeOH/KOH, 60°C) entstehen auscis- undtrans-11,13-Dibrom-9,10-dimethoxy-9,10-propanoanthracen-12-on derFavorskii-Ester5a und das α-Keto-Acetal5b in 46% Gesamtausbeute. Fast alle Reaktionen ergeben ein einziges Isomeres, von dem mittels molekularmechanischer Berechnungen gezeigt werden konnte, daß es sich dabei um das energetisch günstigere Produkt handelt.
    Notes: Summary Submittingcis- andtrans-11,13-dibromo-9,10-dimethoxy-9,10-propanoanthracen-12-one (4a,b) toFavorskii conditions (MeOH/KOH, 60°C) afforded theFavorskii ester5a and the α-keto acetal5b in 46% overall yield. Almost all reactions resulted in the formation of a single isomer which could be shown to be the most favored one by molecular mechanics calculations (MM2).
    Type of Medium: Electronic Resource
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