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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1974 (1974), S. 1534-1535 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Note on the Electrocyclic Ring Opening of 2,3,4,4-Tetraphenyl-2-cyclobuten-1-one to 2,3,4-Triphenyl-1-naphtholThe thermal isomerization of 2,3,4,4-tetraphenyl-2-cyclobuten-1-one to 2,3,4-triphenyl-1- naphthol via electrocyclic opening of the four-membered ring and intramolecular recyclization of the intermediary vinylketene proceeds in yields exceeding 90% both in the melt phase and in a refluxing benzene solution. The reaction is appreciably retarded in the presence of activated AlCl3 as a result of complex formation.
    Notes: Die thermische Isomerisierung von 2,3,4,4-Tetraphenyl-2-cyclobuten-1-on zu 2,3,4-Triphenyl-1-naphthol durch elektrocyclische Vierringöffnung und intramolekulare Recyclisierung des intermediären Vinylketens verläuft in Ausbeuten von über 90% sowohl in der Schmelze, als auch in siedendem Benzol. Die Reaktion wird beträchtlich verlangsamt in Gegenwart von aktiviertem AlCl3 infolge Komplexbildung.
    Type of Medium: Electronic Resource
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