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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 191-195 
    ISSN: 0009-2940
    Keywords: Ozonolysis ; Alkylidenecycloalkanes ; Carbonyl oxides ; 1,2-Dioxolanes ; 1,2,4-Trioxolanes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis of 1,2-Dioxolanes by Ozonolysis of 1,1-Disubstituted Nonactivated OlefinsOzonolyses of the cyclopropyl-substituted olefins 2a, 2b, and 2c do not produce the carbonyl oxides 1a, 1b, and 1c but formaldehyde oxide (1d); 1d can be trapped by the starting olefin and provides the 1,2-dioxolanes 6a, 6b, and 6c, respectively, in ca. 10% yield. Other dioxolanes and normal ozonides may be obtained by the addition of olefins or aldehydes to solutions of the primary ozonides of 2a and 2b.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 1419-1423 
    ISSN: 0009-2940
    Keywords: Cope rearrangement ; Bullvalenes, tri-, tetramethyl- ; Bibullvalenyl, hexamethyl ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Tri-, Tetramethylbullvalenes and HexamethylbibullvalenylThe known monomethylbullvalenes 6 and dimethylbullvalenes 7 are supplemented by tri-8 and tetramethylbullvalenes 9 as well as the hexamethylbibullvalenyl 10. The isomer distributions of the methylbullvalenes 6-9 are determined by NMR-spectroscopy. A vicinal arrangement of two methyl groups is not found. The 4-, 6-, 10-positions are slightly preferred in respect to the 3-, 7-, 9-positions. In the case of the methylbullvalenes 8 and 9 methyl groups occupy additionally the 1-, 2-, 8- but not the 5-position. Contrary to tetrabromobullvalenes 5, isomers of 9 show no pronounced kinetic stability.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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