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  • Organic Chemistry  (1)
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    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1984 (1984), S. 1605-1615 
    ISSN: 0170-2041
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthese of Mesityl-substituted AzulenesThe five position isomer mesityl-substituted azulenes 1-5 have been prepared for the first time. 1- and 5-mesitylazulene (1 and 4) have been obtained by addition of mesityl-Li to appropriate ketonic precursors followed by dehydration and dehydrogenation with sulfur. 2- and 6-mesitylazulene (2 and 5) have been prepared by Hafner syntheses from correspondingly substituted precursors, and 4-mesitylazulene (3) was synthesized via nucleophilic addition of mesityl-Li to azulene. The physical properties as well as electronic spectra are compared and discussed.
    Notes: Die fünf stellungsisomeren mesitylsubstituierten Azulene 1-5 wurden erstmals dargestellt. 1- und 5-Mesitylazulen (1 und 4) wurden durch Addition von Mesityl-Li an geeignete Ketonvorstufen mit nachfolgender Dehydratisierung und Dehydrierung mit Schwefel erhalten. 2- und 6-Mesitylazulen (2 und 5) wurden durch Hafner-Synthesen aus geeignet mesitylsubstituierten Vorstufen dargestellt, und 4-Mesitylazulen (3) wurde über nucleophile Addition von Mesityllithium an Azulen erhalten. Die physikalischen Eigenschaften und Elektronenspektren dieser Verbindungen werden vergleichend diskutiert.
    Type of Medium: Electronic Resource
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