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  • 1
    Digitale Medien
    Digitale Medien
    Complete spectral assignments of cevadine and veratridine by 2D NMR techniques (1988)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 26 (1988), S. 980-989 
    Details
    ISSN: 0749-1581
    Schlagwort(e): Long-range CH correlation ; Double quantum coherence correlation spectroscopy ; DQCOSY ; Veratridine ; Cevadine ; Veratrine ; Zero quantum coherence correlation spectroscopy ; ZQCOSY ; COSY ; One-bond CH correlation ; Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: The long-range CH correlation NMR experiment (with decoupling of modulation of intensities due to one-bond couplings during refocusing) and the double quantum coherence correlation spectroscopy (DQCOSY) experiment were used, together with the standard one-bond CH correlation and COSY spectra, for complete 13C and 1H spectral peak assignments of veratrine (a 2:1 mixture of cevadine and veratridine). The long-range CH correlation experiment determined the long-range CH connectivity network, thus indirectly providing carbon-carbon connectivity. The DQCOSY experiment proved to be a complementary technique to the standard COSY experiment in unraveling and/or confirming proton-proton connectivities in this highly crowded proton spectrum.
    Zusätzliches Material: 8 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/mrc.1260261109
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  • 2
    Digitale Medien
    Digitale Medien
    Long-range CH correlation 2D NMR spectroscopy. 4For Part 3, see Ref. 1. - Complete spectral assignments of the pesticide metabolite S-(2,3-dihydroxy-1-propyl)glutathione (1988)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 26 (1988), S. 542-546 
    Details
    ISSN: 0749-1581
    Schlagwort(e): Long-range CH correlation ; Correlation by long-range coupling ; One-bond CH correlation ; COSY Intensity optimization ; Dibromochloropropane metabolite ; Chemistry ; Analytical Chemistry and Spectroscopy
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Complete 13C and 1H spectral peak assignments of S-(2,3-dihydroxy-1-propyl)glutathione (1) (an in vivo metabolite of the pesticide 1,2-dibromo-3-chloropropane) were made using various 2D NMR techniques. Long-range CH correlation 2D NMR unambiguously assigned the key methylene resonances adjacent to sulfur. Appropriate delays for optimum cross-peak intensities in the long-range correlation experiment were chosen with response intensity curves, generated using estimated long-range coupling constants. These curves, although generated assuming a first-order coupling network, are useful even in systems with strong second-order couplings as in 1.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/mrc.1260260703
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