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  • 1990-1994  (5)
  • Chemistry  (5)
  • Organic Chemistry  (3)
  • oligodeoxynucleotide
  • 1
    Electronic Resource
    Electronic Resource
    M. Fedtke, W. Pritzkow, G. Zimmermann, Technische Organische Chemie. (Grundstoffe, Zwischenprodukte, Finalprodukte, Polymere). 423 S., 58 Abb., 215 Tab., 17 × 23 cm. Deutscher Verlag für Grundstoffindustrie, Leipzig 1992, Hardcover, DM 120,-, ISBN 3-342-00420-7 (1993)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 335 (1993), S. 722-722 
    Details
    ISSN: 0941-1216
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19933350817
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    1,3,4-Thiadiazole durch Umsetzung von Dithioestern mit KohlensäurehydrazidenHerrn Professor Schulz zum 60. Geburtstag gewidmet (1990)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 332 (1990), S. 55-64 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1,3,4-Thiadiazoles by Reaction of Dithiocarboxylic Esters with Carbonic Hydrazides1,1-Dithiooxalic esters 1 and heteroaryl dithiocarboxylic esters 2 react with carbonic hydrazides yielding 1,3,4-thiadiazoles. The 1-thiooxamoyl semicarbazides 3 or 1-heteroylthiocarbonyl semicarbazides 4, primarily formed by thioacylation of semicarbazide, where isolated. By cyclocondensation they yield 1,3,4-thiadiazole-2(3 H) ones 5, 6, or in the presence of acetic anhydride 3-acetyl-1,3,4-thiadiazol-2-ones- 7, 8, respectively.2-Amino- or 2-methylthio-1,3,4-thiadiazoles 11, 12 or 13, 14 are formed by reaction of the dithioesters 1, 2 with thiosemicarbazide or methyl dithiocarbazinate. By this way 1,3,4-thiadiazoles with heteroaryl- or carbamoylresidues in position 5 where synthesized for the first time.
    Additional Material: 8 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19903320107
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    CLAISEN-Kondensation mit ausgewählten Dithioestern - Synthese spezieller 3-Methylthio-acrylnitrile (1991)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 333 (1991), S. 35-40 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: CLAISEN-Condensations with Selected Dithioesters - Synthesis of Special 3-Methylthio-acrylnitriles.A useful synthetic route to the mono- and diheteroaryl-3-methylthio-acrylnitriles 1 and 2 is demonstrated by the thioanalogous CLAISEN-condensation.In the presence of sodium hydride in tetrahydrofurane or under PTC-conditions heteroaryl dithiocarboxylic esters 3 react with CH-acidic compounds 4 or 9 to form 3-mercapto-acrylnitriles (e. g. 5). Methylation leads to mono- and diheteroaryl-3-methylthioacrylnitriles 1 and 10 (type 2). In the same manner tetrathioterephthalic ester 6 reacts with two equivalents of CH-acidic compounds yielding 8 and 11. By means of spectroscopic methods, especially 1H- and 13C-n.m.r., the structures of the compounds obtained are confirmed.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19913330105
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Laser evaporation of some solid organosilicon polymers (1991)
    New York, NY [u.a.] : Wiley-Blackwell
    Applied Organometallic Chemistry 5 (1991), S. 57-64 
    Details
    ISSN: 0268-2605
    Keywords: Laser evaporation ; deposition ; polysilane ; poly(sila-alkene) ; Chemistry ; Industrial Chemistry and Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Continuous wave (cw) CO2 laser irradiation of some organosilicon polymers composed of -Me2Si-, -Me2SiMe2SiCH2-, RMeSi- and RMeSiMe2SiCH2CH2- units (where R = methyl, adamantyl, phenyl and hydrogen) leads to the evaporation of the polymer and is dominated by the formation of a solid deposit that has a continuous structure. It is assumed that chemical changes occur prior to the transfer of ejected material to the gas phase and that these consist mainly of the formation of high molecular biradicals or 1,2-disilacyclobutane monomer that both re-polymerize spontaneously upon their deposition onto a nearby cold surface. The mechanism of these specific decompositions of the polymers is assessed on the basis of the IR spectra of the deposits and, for the minor gaseous products, identification by GC MS techniques.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aoc.590050108
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  • 5
    Electronic Resource
    Electronic Resource
    ESR study of the reaction of trithiazyl trichloride with primary aromatic amines (1990)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 28 (1990), S. 797-806 
    Details
    ISSN: 0749-1581
    Keywords: ESR ; NSN.2-centred radicals ; Trithiazyl trichloride ; 2,1,3-Benzothiadiazole ; Benzenamines ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Benzenamines (1) react with 1,3,5-trichloro-1λ4,3λ4,5λ4-1,3,5,2,4,6-trithiatriazine (2) to form the novel radicals 2-(2λ4-2,4,-dithia-1,3-diaza-2-chloro-1,3-butadien-1-yl)-2λ4-2,1,3-benzothiadiazol-1-yls (4) or 2-(5-chlora-2λ4-2,4-dithia-1,3-diaza-1,2-pentadien-1-yl)-2λ4-2,1,3-benzothiadiazol-1-yls (4′). ESR hyperfine splitting constants of 20 different radicals of type 4 are presented, and the mechanism of their formation and the suggested structure of 4 are discussed.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260280912
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