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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 1755-1765 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Diazo Compounds, 68. Dibenzo[a,c]cyclooctenes and Dibenzo[a,c]heptafulvenes from 5-(Diazomethyl)-5H-dibenzo[a,c]cycloheptenes5,6-Dichloro-5H-dibenzo[a,c]cycloheptene (11) reacts with the silver (diazomethyl)phosphoryl compounds 12a-d and the mercury bis(diazomethylcarbonyl) compounds 12e-h, respectively, by electrophilic diazoalkane substitution to yield the 5-(diazomethyl)-5H-dibenzo[a,c]cycloheptenes 14a-h. The copper(II) acetylacetonate-catalyzed decomposition of 14a, c, e and g in toluene leads to the formation of both dibenzo[a,c]cyclooctenes 16a-d and 17a, b by ring enlargement and of dibenzo[a,c]heptafulvenes 18a-d by 1,2-H-shift.
    Notes: 5,6-Dichlor-5H-dibenzo[a,c]cyclohepten (11) geht mit den Silber-(diazomethyl)phosphorylverbindungen 12a-d bzw. den Quecksilber-bis(diazomethylcarbonyl)verbindungen 12e-h elektrophile Diazoalkansubstitution zu den 5-(Diazomethyl)-5H-dibenzo[a,c]cycloheptenen 14a-h ein. Kupfer(II)-acetylacetonat-katalysierte Zersetzung von 14a,c,e und g in Toluol führt über Ringerweiterung zu den Dibenzo[a,c]cyclooctenen 16a-d und 17a,b sowie unter 1,2-H-Shift zu den Dibenzo[a,c]heptafulvenen 18a-d.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
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