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NMR study of quinolizidine alkaloids: relative configurations, conformations.
- Source :
-
Magnetic resonance in chemistry : MRC [Magn Reson Chem] 2005 Apr; Vol. 43 (4), pp. 283-93. - Publication Year :
- 2005
-
Abstract
- Extracts of fruits and leaves of Connarus paniculatus afford six quinolizidine alkaloids which were identified as piptanthine, 18-epipiptanthine, ormosanine, homoormosanine, podopetaline (monohydrochloride) and homopodopetaline on the basis of high-field NMR studies. 1D and 2D NMR experiments provide complete assignments of the (1)H and (13)C spectra. In conjunction with detection of nuclear Overhauser effects (NOESY), these results allow detailed structure characterization including determination of relative configurations for the chiral sites and conformational analysis. Exchange phenomena involving nitrogen inversion were detected.<br /> (Copyright (c) 2005 John Wiley & Sons, Ltd)
Details
- Language :
- English
- ISSN :
- 0749-1581
- Volume :
- 43
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Magnetic resonance in chemistry : MRC
- Publication Type :
- Academic Journal
- Accession number :
- 15706612
- Full Text :
- https://doi.org/10.1002/mrc.1554