## Abstract The NMR spectra of a spiro oxirane (**1**) derivative of codeinone, codeine (**2**), isocodeine (**3**), 6‐methylcodeine (**4**) and 6‐methylisocodeine (**5**) were compared. NOE and double‐resonance experiments were used to confirm the conformation of **1**, and the configuration about
Nuclear magnetic resonance spectra of tropic acid and some derivatives
✍ Scribed by V.S. Dimitrov; S.L. Spassov; T.Zh. Radeva; J.A. Ladd
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 712 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0022-2860
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
## Abstract The NMR spectra of eight alkyl vinyl sulphides have been analyzed and the parameters compared with those obtained from an analogous series of oxygen derivatives. It is shown that a definite parallelism exists between chemical shifts and HH coupling. Difference in absolute values have b
The N.M.R. spectra of the cis octadecenoic (A2-A17), octadecynoic (A2-A 5, Al°), and dodecynoic (A s\_ A ll) acids have been recorded. Those with unsaturation near the centre of the molecule cannot be distinguished from one another but the four isomers with unsaturation closest to the carboxyl group
## Abstract ^13^C n.m.r. studies of a series of tricarbocyclic ring C aromatic diterpenoids using proton‐noise and single‐frequency off‐resonance decoupling, partially relaxed Fourier transform techniques, shift reagents and specifically labelled derivatives have permitted unequivocal assignments o