13C-NMR studies of marine natural products II. Total assignment of the 13C-NMR spectrum of asperdiol
β Scribed by Gary E. Martin; James A. Matson; Alfred J. Weinheimer
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- French
- Weight
- 206 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
13 C-nmr spectral assignments for asperdiol are made with the aid of model compounds and Tl relaxation behavior.
Overall isotropic tumbling was inferred from the latter providing a supplemental means of multiplicity determination.
Utilization of the Tl relaxation times as an assignment criterion
π SIMILAR VOLUMES
## Abstract The diterpene trachylobane and a series of derivatives have been completely analysed by FT ^13^C NMR spectroscopy. All ^13^C frequencies for trachylobanol have been unambiguously assigned by experimental techniques, i.e. by proton singleβfrequency selective decoupling and shift reagent
Colletotrichin (I) is a phytotoxic substance isolated from CoZZetotrichwn nicotianae 1) C. capsi'), and and the structure has been independently determined by X-ray analysis of itself 1) and its acetate3). In addition to I, we isolated two closely related compounds, colletotrichins B (II) and C (III
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Attached proton test (APT) spectra acquired with residual coupling (termed RECAPT) can be advantageous in assigning "C NMR spectra of complex natural products. RECAPT was applied to the analysis of the =C NMR spectra of two terpene marine natural products to iUustrate its advantages over APT in situ
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