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  • Chemistry  (1)
  • 1995-1999  (1)
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    Electronic Resource
    Electronic Resource
    Pyryliumolate. III. Synthese anellierter Benzotropolone (1997)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 339 (1997), S. 205-216 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Pyryliumolates. III. Synthesis of Annulated BenzotropolonesDirhodiumtetraacetate catalyzed nitrogen extrusion from diazocarbonyl compounds (2a-f, 19c, 23d-f, 25b) yields benzopyryliumolates (3), which were trapped intramolecularly in situ to give tetracyclic adducts (4a, 5a-d, 20, 24a-c, 26). Starting with 5a and 5d annulated benzotropolones (12a, d) are accessible.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19973390140
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