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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 1974 (1974), S. 1876-1881 
    ISSN: 0075-4617
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Diyne Reaction, XXIX1). - Synthesis of Benzo-, Furano-, Thiopheno-, Selenopheno-, and Pyrrolo-benzotriazolequinones1-Phenyl-1,2,3-triazole-4,5-dicarbaldehyde (1) reacts with phenylethynylmagnesium bromide to give a diol 2, whose oxidation leads to the o-diketo diyne derivative 3. With tris(triphenylphosphine)rhodium(I) chloride, 3 gives the Rh-complex 4. Reaction of the Rh-complex 4 with acetylenes, chalcogens and phenyl azide or nitrosobenzene affords the mono- and bis-heterocondensed benzoquinones 6-11.
    Notes: 1-Phenyl-1,2,3-triazol-4,5-dicarbaldehyd (1) ergibt mit Phenyläthinylmagnesiumbromid ein Diol 2, dessen Oxidation zum o-Diketo-diin-Derivat 3 führt. Mit Tris(triphenylphosphin)-rhodium(I)-chlorid entsteht aus 3 der Rh-Komplex 4. Die Umsetzung des Rh-Komplexes 4 mit Acetylenen, Chalkogenen und Phenylazid oder Nitrosobenzol führt zu den mono- und bis-heterokondensierten Benzochinonen 6-11.
    Type of Medium: Electronic Resource
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