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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 838-846 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis of Di- and Trihalo-1,3-dimethylcyclobutanesDehydrobromination of 1,3-dibromo-1,3-dimethylcyclobutane (5) with potassium tert-butoxide afforded 1-methyl-3-methylene-1-cyclobutene (1). Addition of hydrogen bromide and hydrogen chloride to 1 produced 3-bromo-(2) and 3-chloro-1,3-dimethyl-1-cyclobutene (3), respectively. Further addition of hydrogen halides to 2 and 3 yielded the stereoisomeric 1,3-dibromo- (5), 1,3-dichloro- (7), and 1-bromo-3-chloro-1,3-dimethylcyclobutanes (6). Bromination of 2 and of 3 afforded the stereoisomereic 1,2,3-tribromo- (4) and 1,2-dibromo-3-chloro-1,3-dimethylcyclobutanes (8), respectively.
    Notes: Dehydrobromierung von 1,3-Dibrom-1,3-dimethylcyclobutan (5) mit Kalium-tert-butylat gab 1-Methyl-3-methylen-1-cyclobuten (1). Addition von Brom- bzw. von Chlorwasserstoff an 1 lieferte 3-Brom-(2) bzw. 3-Chlor-1,3-dimethyl-1-cyclobuten (3). Weitere Halogen-wasserstoffadditionen an 2 und 3 führten zu den stereoisomeren 1,3-Dibrom- (5), 1,3-Dichlor-(7) und 1-Brom-3-chlor-1,3-dimethylcyclobutanen (6). Die Bromierung von 2 bzw. von 3 lieferte die stereoisomeren 1,2,3-Tribrom- (4) bzw. 1,2-Dibrom-3-chlor-1,3-dimethyl-cyclobutane (8).
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 83 (1971), S. 904-904 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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