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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 3806-3817 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Indolenine Oxides, IV: Peracid Oxidations of Some 3,3-Dimethyl-3H-indolesOn treatment of the 3H-indoles 6a-h with 3-chloroperbenzoic acid, the primarily formed 7,7a-dihydrooxazirino[a]indoles 7a-h cannot be isolated due to their spontaneous rearrangement into the indolinones 4a-h and into the isocyanates 9a-h. The latter may be isolated and characterized as such or by means of derivatives. This rearrangement pattern ist typical for 7a-unsubstituted but 3-substituted 7,7a-dihydrooxazirino[a]indoles. Deuterium labelling at C-2 of 6a decreases the amount of 4a and 9a while increasing the yield of the ring-enlarged product 11 thus demonstrating the hydrogen atom at C-2 of 6a as the source of the benzylic hydrogen in 9a.
    Notes: Bei der Behandlung der 3H-Indole 6a-h mit 3-Chlorperbenzoesäure können die primär gebildeten 7,7a-Dihydrooxazirino[a]indole 7a-h nicht gefaßt werden, da sie spontan in 35-85proz. Ausbeute in die Indolinone 4a-h und die Isocyanate 9a-h übergehen. Letztere werden entweder als solche oder in Form von Derivaten isoliert bzw. charakterisiert. Dieses Umlagerungsmuster ist für 7a-unsubstituierte, aber 3-substituierte 7,7a-Dihydrooxazirino[a]indole typisch. Deuteriummarkierung an C-2 von 6a verringert den Anteil der durch H-Verschiebung entstehenden Produkte 4a und 9a zugunsten des Ringerweiterungsproduktes 11 und beweist, daß das benzylische H-Atom in 9a von C-2 des eingesetzten 6a stammt.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 112 (1979), S. 3950-3954 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Indolenine Oxides, VII. Photodecarbonylation of Two 3,3-Dimethyl-2-indolinonesThe 2-indolinones 2 a, b b in methanol undergo decarbonylation by UV light (254 nm) resulting in formation of the o-quinonemethide imines 3 a b. Main products always are the methanol adducts 4a, c. Among the minor products, the quinoline 12 and the diamine 7 are remarkable, the latter because it necessarily originates from the (on the basis of literature data) unexpected 3a-dimer 9.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 40 (1927), S. 349-354 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Brookfield, Conn. : Wiley-Blackwell
    Journal of Vinyl and Additive Technology 1 (1979), S. 145-149 
    ISSN: 0193-7197
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Process Engineering, Biotechnology, Nutrition Technology
    Notes: The increased use of multi-screw (twin) extruders by pipe producers brought on this study of available PVC homopolymer “pipe grade” resins. Basic tests on resin were examined via a “Correlation Matrix” computer program. Highly significant test data were determined to be internal pore volume and centrifuge plasticizer adsorption. Additional compound evaluation proceeded via torque rheometer followed by twin-screw extrusion. Significant resin test values affecting extrusion properties are inherent viscosity, apparent bulk density, porosity uniformity and melt viscosity. The work shows that the compounder should know resin properties in order to benefit from processing equipment developments.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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