Three known bisabolane hydrocarbons, a-trans -bergamotene, sesquiphellandrene and zingiberene, were isolated from the aerial parts of Alpinia densibracteata . Their 1H and 13C NMR spectra were completely assigned by using a combination of 13C DEPT and 2D-NMR experiments (1H-1H COSY, single-bond 13C-
Total assignment of 13C and 1H spectra of three isomeric triterpenol derivatives by 2D NMR: an investigation of the potential utility of 1H chemical shifts in structural investigations of complex natural products
β Scribed by William F. Reynolds; Stewart McLean; Janusz Poplawski; Raul G. Enriquez; Laura I. Escobar; Ismael Leon
- Book ID
- 108371719
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- French
- Weight
- 712 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0040-4020
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
The 2D NOESY method was used to determine the E/Z configuration and s-cis/s-trans conformation in a series of 3acylmethylene-2,2,3-trisubstituted-2,3-dihydrofurans. The assignments of 1 H and 13 C NMR chemical shifts and J 13 C, 1 H) coupling constants are presented.
## Abstract Solution NMR methods were used for the structural characterization of the acetoxyendiyne __E__/__Z__ configuration of the marine natural products peyssonenynes A and B and their synthetic analogs derived from palmitic acid. The scarcity of protons in the proximity of the olefin preclude