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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 408-423 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Reaction of Diarylcyclopropenones with YnaminesThe reaction of diphenylcyclopropenone (1a) and other diarylcyclopropenones (1b - e) with ynamines leads to the violet 3-aminocyclopentadienones 8, 24, 28, in some cases to the blue 2-aminocyclopentadienones 35 as by-products. The structure of these compounds is proven by means of spectroscopical data and chemical reactions (i. e. independent synthesis of products 8, 35 and/or synthesis of hydrolysis products (26,31), Diels-Alder reactions giving benzene derivatives (20, 36, 37) or cycloaddition reactions leading to tropones (23)). The amino cyclopenta-dienone formation is interpreted in terms of a (2 + 3)-cycloaddition mechanism of the ynamine to the cyclopropenone C-1/C-3 bond.
    Notes: Bei der Umsetzung von Diphenylcyclopropenon (1a) und anderen Diarylcyclopropenonen (1b - e) mit Inaminen entstehen die violetten 3-Aminocyclopentadienone 8, 24, 28, als Nebenprodukte in einigen Fällen die blauen 2-Aminocyclopentadienone 35. Die Konstitution dieser Produkte wird auf spektroskopischem und chemischem Wege (direkte Synthese (8, 35) und/oder Synthese von Hydrolyseprodukten (26,31), Diels-Alder-Reaktionen zu Benzolderivaten (20, 36, 37) oder Cyclo-addition zu Troponen (23) bewiesen. Aufgrund der erhaltenen Ergebnisse ist die Aminocyclo-pentadienon-Bildung mechanistisch als (2 + 3)-Cycloaddition des Inamins an die Bindung C-1/C-3 der Cyclopropenone zu interpretieren.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
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