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  • 1
    Electronic Resource
    Electronic Resource
    N.N-Disubstituierte 2-Amino-cyclobutanone aus 2-Hydroxy-cyclobutanonen und sekundären Aminen (1972)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 975-981 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: N.N-Disubstituted 2-Aminocyclobutanones from 2-Hydroxycyclobutanones and Secondary AminesN.N-Disubstituted 2-aminocyclobutanones (7) are readily formed under mild conditions by reaction of 2-aminocyclobutanones (7) are readily formed under mild conditions by reaction of 2-hydroxycyclobutanone (6) with secondary amines in solution at room temperature. Optimum yields are obtained when 6 - prepared by hydrolysis of 1.2-bis(trimethylsiloxy)cyclobut-1-ene (8) - reacts in situ. By this method derivatives of 7 as well as higher homologous 2-aminocycloalkanones are also easily prepared.
    Notes: 2-Hydroxy-cyclobutanon (6) reagiert bei 20° in Lösung glatt mit sekundären Aminen zu den N.N-disubstituierten 2-Amino-cyclobutanonen (7). Optimale Ausbeuten an 7 lassen sich erzielen, wenn 6 in situ - dargestellt durch Hydrolyse des 1.2-Bis-trimethylsiloxy-cyclo-butens-(1) (8) - umgesetzt wird. Auf diese Weise sind auch Derivate von 7 sowie höherhomologe 2-Amino-cycloalkanone leicht erhältlich.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19721050328
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  • 2
    Electronic Resource
    Electronic Resource
    Cyclobutandion-(1.2) (1971)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 104 (1971), S. 2869-2872 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cyclobutane-1.2-dioneThe synthesis of the hitherto unknown cyclobutane-1.2-dione (3) by bromination of 1.2-bis-(trimethylsiloxy)cyclobut-1-ene (4) is described. The rearrangement of 3 to 1-hydroxycyclopropane-1-carboxylic acid (5) is catalyzed by acids as well as by bases.
    Notes: Die Synthese des bislang unbekannten Cyclobutandions-(1.2) (3) durch Bromierung des 1.2-Bis-trimethylsiloxy-cyclobutens-(1) (4) wird beschrieben. 3, das ausschließlich als α-Diketon vorliegt, lagert sowohl säure- als auch basenkatalysiert zu der 1-Hydroxy-cyclopropan-carbonsäure-(1) (5) um.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19711040928
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