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  • Inorganic Chemistry  (1)
  • 1975-1979  (1)
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    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 2986-2995 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Spirohexane Derivatives by Photosensitized Cycloadditions to MethylenecyclopropanePhotosensitized addition of maleic anhydride and some of its derivatives to methylenecyclopropane (1) gives spirohexanes in good yields. Dichlorovinylene carbonate and 1,3-diacetyl-4-imidazolin-2-one react with 1 in the same manner. In none of the reactions studied the formation of methylenecyclopentane derivatives was observed. A mechanism is suggested for the cycloadditions which involves as the initial step the terminal attack of the triplet excited components on the double bond of 1.
    Notes: Maleinsäureanhydrid und einige Derivate liefern bei der photosensibilisierten Addition an Methylencyclopropan (1) in guten Ausbeuten Spirohexane. Entsprechend reagieren auch Dichlorvinylencarbonat und 1,3-Diacetyl-4-imidazolin-2-on mit 1. In keiner der untersuchten Reaktionen gibt es Hinweise auf die Bildung von Methylencyclopentan-Derivaten. Als Mechanismus für die Cycloadditionen wird ein primärer terminaler Angriff der triplettangeregten Komponenten an die Doppelbindung von 1 formuliert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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