## Abstract Carbon‐13 spectral assignments of three friedelanes and nineteen secofriedelanes have been made from mutual correlations, 2D X‐H correlation analyses and comparison with the carbon shifts of friedelin, which were firmly established by an INADEQUATE experiment that required reassignment
Applications of two-dimensional NMR in spectral assignments of the cytotoxic triterpene saponaceolide B
✍ Scribed by Corrada Geraci; Mario Piattelli; Corrado Tringali
- Publisher
- John Wiley and Sons
- Year
- 1991
- Tongue
- English
- Weight
- 259 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
COSY, one‐bond and long‐range HETCOR NMR spectra were used in combination for the complete ^1^H and ^13^C assignments of the cytotoxic triterpene saponaceolide B. Stereochemical assignments were based on a NOESY spectrum.
📜 SIMILAR VOLUMES
## Abstract Two new abietane derivatives were obtained by treatment of the diterpene taxodione with diazomethane. Their structures were determined by mass spectrometry and NMR studies, including one‐ and two‐dimensional experiments. Copyright © 2004 John Wiley & Sons, Ltd.
## Abstract Three prenylflavanones, sigmoidins A, B and C, were studied using one‐ and two‐dimensional NMR techniques. The interpretation of these spectra led to the definitive assignments of all carbon and hydrogen chemical shifts.
As aromatic residues very often are part of the hydrophobic essential for an accurate and precise structure determination. core of proteins, the unambiguous assignment of the aromatic Therefore, methods for the unambiguous assignment of aroproton resonances is essential for an accurate and precise s