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  • Organic Chemistry  (2)
  • 13C NMR  (1)
  • 2-Ethylthiazolo[4,5-a]-9-acridinone  (1)
  • Benzene derivatives  (1)
  • 1
    Electronic Resource
    Electronic Resource
    The benzene ring as a dipolarophile: Reactions of monosubstituted benzenes with tetracyanoethylene oxide (1992)
    Springer
    Monatshefte für Chemie 123 (1992), S. 99-104 
    Details
    ISSN: 1434-4475
    Keywords: Benzene derivatives ; Tetracyanoethylene oxide ; 1,3-Dipolar cycloaddition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Es wurden die Reaktionen von Tetracyanoethylenoxid mit Toluol, Chlorbenzol, Fluorbenzol, Anisol und Nitrobenzol untersucht. Toluol und die Halogenbenzole ergaben Mischungen von Monoaddukten, Anisol ergabp-Methoxyphenylmalononitril und sein Dimer, Nitrobenzol zeigte keine Reaktion. Diese Resultate werden mit Hilfe eines qualitativen Orbitalmodells diskutiert. Die Analyse einiger Monoaddukte erfolgte mittels1H-NMR-Analyse.
    Notes: Summary The reaction of tetracyanoethylene oxide on one hand and toluene, chlorobenzene, fluorobenzene, anisole, and nitrobenzene, on the other, has been studied. Toluene and the halogenobenzenes yield mixtures of monoadducts, anisole yieldp-methoxyphenylmalononitrile and its dimer and nitrobenzene does not react. These results are discussed with the help of a qualitative orbital model.1H-NMR analysis of some monoadducts has been carried out.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01045302
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis, Spectroscopy and Tautomeric Study of Thiazoles substituted in positions 2 and 4 by hydroxy, mercapto and amino groups (1985)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 327 (1985), S. 251-260 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Thiazoles substituted in positions 2 and 4 by hydroxy, mercapto and amino groups were synthesized, as well as its carbamate derivates and formylhydrazones. The research of the reaction of the formylhydrazide with 4-imino-2-thiazolidinone has not given the pyrazolo [3,4-d]- thiazol-2-one, but the 4-formylhydrazono-2-thiazolidine. The detailed tautomeric study of each of the heterocyclic compounds has been carried out by infrared spectroscopy, nuclear magnetic resonance of proton and of 13-carbon, and of masses.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19853270210
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  • 3
    Electronic Resource
    Electronic Resource
    Similarity in physical organic chemistry: Substituent effects on the intrinsic basicity of 4-substituted pyrazoles (1994)
    Chichester : Wiley-Blackwell
    Journal of Physical Organic Chemistry 7 (1994), S. 657-662 
    Details
    ISSN: 0894-3230
    Keywords: Organic Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The gas-phase basicities of eight pyrazoles substituted only at position 4 (R4 = H, NO2, F, Cl, CO2C2H5, CH3, NH2, 1-adamantyl) were measured by Fourier transform ion cyclotron resonance. The experimental values were treated in two ways, first by comparing these values with the AM1-calculated proton affinities. Since the correlation was reasonably good [PA(calc.) = -11·3 + 1·063PA(exp.), n = 8, r = 0·984], a set of 17 further 4-substituted pyrazoles and their cations were calculated using the AM1 approximation and their gas-phase basicities were estimated. Second, both the experimental and the AM1-calculated values were considered within the framework of the Taft-Topsom analysis of substituent effects. Comparison of the analyses for pyrazoles and pyridines led to the unexpected result that, in spite of differences in ring size and number of heteroatoms, both systems behave remarkably alike.
    Additional Material: 5 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/poc.610071203
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  • 4
    Electronic Resource
    Electronic Resource
    13C nuclear magnetic resonance studies of pyrazolo[α]-9(10H)-acridinones (1991)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 29 (1991), S. 638-640 
    Details
    ISSN: 0749-1581
    Keywords: Pyrazolo[a]-9(10H)-acridinones ; 2-Ethylthiazolo[4,5-a]-9-acridinone ; Indazole derivatives ; 13C NMR ; δ and J values ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 13C NMR chemical shifts of six pyrazolo[a]-9(10H)-acridinones are reported; they were assigned on the basis of multiplicities, carbon-proton coupling constants, selective proton decoupling experiments and comparison with related substances.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260290618
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