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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 3406-3417 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Bridged Bishomotropylium Ions from Bicyclo[4.3.1]decatrienesThe 1.6-methano-bridged bishomotropylium ions 8 and 14 are stable in FSO3H/SO2/CD2Cl2 solution. 8 and 14 contain the bicyclo[4.3.1]decatrienyl skeleton which can be synthesized quite easily starting from bullvalene (3). 3 and lead tetraacetate generate the 7.10-diacetoxybicyclo[4.3.1]decatriene 4 which can be transformed into 11-13. Mercury dibromide transforms 3 into the bicyclo[4.2.2]decatetraene 5. Addition of the corresponding electrophiles to 5 leads to the bicyclo[4.3.1]decatrienes 6, 7 and 9. The mechanism of the electrophilic addition reactions with rearrangement is discussed. The crucial intermediate is the bridged bishomotropylium ion 8.
    Notes: Den in FSO3H/SO2/CD2Cl2 stabilen 1.6-methano-überbrückten Bishomotropylium-Ionen 8 und 14 liegt das Bicyclo[4.3.1]decatrien-Skelett zugrunde, das, letztlich ausgehend von Bullvalen (3), leicht dargestellt werden kann. So bildet 3 mit Blei(IV)-acetat das 7.10-Diacetoxybicyclo[4.3.1]decatrien 4, aus dem 11-13 erhalten werden können. Mit Quecksilberdibromid gibt 3 das Bicyclo[4.2.2]decatetraen 5. Die Bicyclo[4.3.1]decatriene 6, 7 und 9 entstehen bei der Addition der entsprechenden Elektrophile an 5. Der Mechanismus der unter Umlagerung ablaufenden elektrophilen Additionsreaktionen wird diskutiert. Das entscheidende Zwischenprodukt ist das überbrückte Bishomotropylium-Ion 8.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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