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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 2358-2371 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cyclophanes, XIII. On the Chemical Behaviour of [2.2.2](1,2,4)Cyclophane[2.2.2](1,2,4)Cyclophane (10) has been prepared by several routes from dimethyl [2.2]paracyclophane-4,13-dicarboxylate (5) and subjected to the following reactions: pyrolysis in p-diisopropylbenzene and dimethyl maleate (formation of 13 and 16, respectively), isomerization in the presence of aluminiumtrichloride/hydrogenchloride to the unsymmetrical [2.2.2](1,2,4)(1,2,5)cyclophane (17), bromination to afford 20, catalytic hydrogenation to the di- and monoolefin 22 and 23, respectively, Diels-Alder-addition with N-phenyltriazolindione, tetracyanoethylene, dicyanoacetylene, and maleic anhydride which provides 1:1- (29) and 1:2-adducts (30). The relation between chemical reactivity and degree of bridging in multiply-bridged cyclophanes is discussed.
    Notes: [2.2.2](1,2,4)Cyclophan (10) wird auf mehreren Wegen aus [2.2]Paracyclophan-4,13-dicarbonsäure-dimethylester (5) hergestellt und in folgenden Reaktionen untersucht: Pyrolyse in p-Diisopropylbenzol und Maleinsäure-dimethylester (Bildung von 13 bzw. 16), Isomerisierung in Gegenwart von Aluminiumtrichlorid/Chlorwasserstoff zum unsymmetrischen [2.2.2](1,2,4)(1,2,5)Cyclophan (17), Bromierung zu 20, katalytische Hydrierung zum Di- bzw. Monoolefin 22 und 23, Diels-Alder-Addition mit N-Phenyltriazolindion, Tetracyanethylen, Dicyanacetylen und Maleinsäureanhydrid, wobei 1:1- (29) und 1:2-Addukte (30) isoliert werden. Der Zusammenhang von Überbrückungsgrad und chemischer Reaktivität mehrfach verbrückter Phane wird diskutiert.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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