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  • 1
    Electronic Resource
    Electronic Resource
    Mass spectrometric studies of sulfur compounds. Some 1-(5-ethyl-2-thienyl)-1-thiaalkanes (1979)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 6 (1979), S. 260-265 
    Details
    ISSN: 0306-042X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Fragmentation studies of the mass spectra of 15 high purity compounds of the 1-(5-ethyl-2-thienyl)-1-thiaalkane series are presented. The molecular weight range covered is from 158 to 284. These substances are of importance to those utilizing fossil fuels which contain them and also to those studying natural products. The molecular ion intensities are moderately strong and easy to verify due to the presence of two sulfur atoms in the molecule. Prominent ions occur in all spectra at m/z 144 and 129. A total of six different ion species are base peaks for the compounds reported, including alkyl and alkenyl ions. The methyl and ethyl compounds are exceptions to the correlations developed in this work and are discussed in detail. Metastable and low ionization voltage data are presented in support of the suggested mechanisms of fragmentation. Those using only three to four peaks in selected ion monitoring should anticipate experiencing difficulties with positive identification of these types of molecules due to the plethora of alkylions. An integration of the correlations developed with those of other sulfur containing moieties is presented.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200060607
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Structural elucidation of two major metabolites of crisnatol in the rat by NMR and mass spectrometry (1992)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 30 (1992), S. 200-206 
    Details
    ISSN: 0749-1581
    Keywords: Crisnatol ; Metabolites ; COSY ; RCOSY ; HMQC ; HMBC ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: NMR and mass spectral data are presented in support of the structures of two metabolites of crisnatol, 2-[(6-chrysenylmethyl)amino]-2-methylpropane-1,3-diol, a novel DNA intercalator currently undergoing Phase II clinical trials as an anticancer agent. Elucidation of the structures of the major rat urinary metabolite as trans-1,2-dihydro-1,2-dihydroxycrisnatol, and the major rat fecal metabolite as 1-hydroxycrisnatol, using 2D NMR techniques are described.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260300303
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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