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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 1272-1279 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Thermal Rearrangements of 8-Methoxybicyclo[5.1.0]octa-2,4-diene and 8-Methoxybicyclo[5.1.0]oct-2-eneThe equilibria 2x ⇄ 3e and 9x ⇄ 11 of the title compounds reveal a slight influence of methoxy substituents on the stability of cyclopropane rings. Reactions which involve the distal cyclopropane bond  -  the butadienylcyclopropane rearrangement of 2 and the homo-1,5-H shift of 9  -  are but modestly accelerated by methoxy groups. The vinylcyclopropane rearrangement 9x → 10 confirms the strong methoxy effect on proximal cyclopropane bonds.
    Notes: Die Gleichgewichte 2x ⇄ 3e und 9x ⇄ 11 der Titelverbindungen zeigen einen geringen Einfluß von Methoxy-Substituenten auf die Stabilität des Cyclopropanrings. Reaktionen unter Beteiligung der gegenüberliegenden Cyclopropan-Bindung  -  die Butadienylcyclopropan-Umlagerung von 2 und die Homo-1,5-H-Verschiebung von 9  -  werden durch Methoxygruppen nur mäßig beschleunigt. Die Vinylcyclopropan-Umlagerung 9x → 10 bestätigt den starken Methoxy-Effekt auf benachbarte Cyclopropan-Bindungen.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
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