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  • 1
    Electronic Resource
    Electronic Resource
    The Interaction of Resorcin[4]arenes with FeIII in Chloroform (2000)
    Weinheim : Wiley-Blackwell
    Liebigs Annalen 2000 (2000), S. 841-847 
    Details
    ISSN: 1434-193X
    Keywords: Resorcin[4]arenes ; Cation interactions ; Interaction sites ; Configuration determination ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: ---Resorcinarene octamethyl ethers, bearing carboalkyloxy groups in the side chains, have been shown to interact with FeIII in organic media. 1H-NMR studies, carried out using GaIII instead of FeIII, suggest that these systems have two active sites of interaction, the first located at the aromatic moiet and the other in the vicinity of the carbonyl groups. As a confirmation of this, resorcinarenes without carbonyl groups in the side chains have been found to exhibit only one active site. Notably, in the latter case the interaction results in configurational changes.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 2
    Electronic Resource
    Electronic Resource
    The antibiotic complex of retamycins: A fast atom bombardment mass spectrometric study (1989)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 18 (1989), S. 553-557 
    Details
    ISSN: 0887-6134
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Fast atom bombardment (FAB) mass spectrometry is, for the first time, successfully applied to the underivatized anthracycline antibiotics retamycins E1 and E2, using bis-(2-hydroxyethyl)sulphide as the matrix compound. The spectra are characterized by abundant protonated molecular ions and also by a number of sequence ions, which can be easily rationalized in terms of the carbohydrate sequence in the molecules. The relative abundance of these ions seems to depend on the functionalities close to the glycosidic oxygen, and also on their stereochemical relationship. Structural results are also confirmed by the analysis of the FAB mass spectra of the acetyl derivatives.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200180807
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  • 3
    Electronic Resource
    Electronic Resource
    Carbon-13 NMR chemical shift assignment of neoflavonoids (1989)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 27 (1989), S. 1181-1183 
    Details
    ISSN: 0749-1581
    Keywords: 13C ; NMR chemical shifts ; Neoflavonoids ; 5,7-Dihydroxy- and 5,7-dimethoxy-4-arylcoumarins ; 2D NMR ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The 13C NMR resonances of some 5,7-dihydroxy- and 5,7-dimethoxy-4-arylcoumarins were assigned by two-dimensional NMR experiments (HETCOR and LONG-RANGE HETCOR) on some key compounds.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260271214
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