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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 2779-2786 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Small Rings, 31. Neighbouring Group Effects in Cyclobutene DerivativesBenzoylcyclobutenecarboxylic acid 6, formed as an intermediate from anhydride 2 under Friedel-Crafts conditions, adds one molecule of benzene to the formally isolated double bound. Main product is compound 5a, a minor component is stereoisomer 5b. This high selectivity can be explained by a neighbouring group relationship between double bound and benzoyl group in the cyclobutene derivative 6.
    Notes: Die aus Anhydrid 2 unter Friedel-Crafts-Bedingungen intermediär entstehende Benzoylcyclobutencarbonsäure 6 addiert ein Molekül Benzol an die formal isolierte Doppelbindung. Hauptprodukt ist Verbindung 5a, Nebenprodukt das Stereoisomere 5b. Eine Erklärung für die hohe Selektivität bietet eine Nachbargruppen-Wechselwirkung zwischen Doppelbindung und Benzoylgruppe im Cyclobuten-Derivat 6.
    Type of Medium: Electronic Resource
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