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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 110 (1977), S. 3714-3718 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions Involving Hydrogen-Transfer, I. 1,4-Di(9-fluorenylidene)-2,3-diphenylbutane1-(2,2′-Biphenylylene)-3-phenyl-1-propene (6) was prepared according to equation (1) 6, which is CH-active, reacts at room temperature with 9,9-dipiperidinofluorene (1) or with tetrachloro-o-benzoquinone to yield the title compound 9.
    Notes: 1-(2,2′-Biphenylylen)-3-phenyl-1-propen (6) wurde nach Gleichung (1) hergestellt. Als CH-aktive Verbindung liefert 6 mit 9,9-Dipiperidinofluoren (1) oder mit Tetrachlor-o-benzochinon bei Raumtemperatur die Titelverbindung 9.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1,2,3-Tricarbonyl Compounds, VIII. The Use of Fluorenylidenetriphenylphosphoranes in Wittig Olefin Synthesis. Experiments with 1, 2,3-Indanetrione, 1,2,3-Trioxo-2,3-dihydrophenalene, Glyoxal, and TerephthalaldehydeThe fluorenylidenetriphenylphosphoranes 1 and 2 react with the cyclic 1,2,3-tricarbonyl compounds 5 and 6 to yield the corresponding ethylenes 9-12 and triphenylphosphine oxide. Treatment of 1 and 2 with glyoxal or terephthalaldehyde affords the dienes 20-23.25 was obtained by reaction of 9-phenanthrenecarbaldehyde with 1. - Statements found in the literature concerning the reactivity of 1 are discussed.
    Notes: Die Fluorenylidentriphenylphosphorane 1 und 2 reagieren mit den hydratbildenden cyclischen 1,2,3-Tricarbonylverbindungen 5 und 6 bei Raumtemperatur unter Bildung der entsprechenden Äthylene 9-12 neben Triphenylphosphinoxid. Mit Glyoxal bzw. Terephthalaldehyd bilden sie die Diene 20-23. Das Umsetzungsprodukt aus 1 und 9-Phenanthrencarbaldehyd (vgl. 25) wird beschrieben. - Die Literaturangaben zur Reaktivität von 1 werden diskutiert.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 322-327 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1,2,3-Tricarbonylverbindungen, X. The Action of Diaryidiazomethanes on Cyclic 1,2-Di- and 1,2,3,-Tricarbonyl CompoundsThe action of asymmetrically substituted diaryldizaomethanes on o-quinones and cyclic 1,2,3-tricarbonyl compounds yields 1,3-dioxoles of type B (schema (2)). Attention is drawn to the problem of valency isomerism and to the difference in mass spectra of α-ketoepoxides of type A and of 1,3-dioxoles of type B.
    Notes: Bei der Einwirkung unsymmetrisch substituierter Diaryldiazomethane auf o-Chinone und cyclische 1,2,3-Tricarbonylverbindungen entstehen nach Schema (2) 1,3-Dioxole des Typs B. Die Frage der Valenzisomerisierung von α-Ketoepoxiden des Typs A und 1,3-Dioxolen des Typs B sowie die Fragmentierungsunterschiede beider Verbindungstypen im Massenspektrometer werden diskutiert.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 9 (1974), S. 660-664 
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: During the fragmentation of 1.3-dioxoles by electron-impact an aryl rearrangement of the electrophilic as well as of the nucleophilic function occurs. Moreover, in one case a cleavage of geminal bonds at the spiro carbon is observed, which can be explained by the product stability of the doubly charged ion.
    Notes: Bei der elektronenstroßinduzierten Fragmentierung 1.3-Dioxolen werden im Gegensatz zu sonstigen Arylwanderungen sowohl die nucleophile als auch die elektrophile Gruppe umgelagert. Anßerdem wird in einem Fall eine ungewöhnlich intensive Spaltung geminaler Bindungen am Spiro-Kohlenstoff beobachtet, die durch die Produkt-Stabilität des doppelt geladenen Fragment-Ions erklärbar ist.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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