## Abstract 3′‐Epilutein (=(all‐__E__,3__R__,3′__S__,6′__R__)‐4′,5′‐didehydro‐5′,6′‐dihydro‐__β__,__β__‐carotene‐3,3′‐diol; **1**), isolated from the flowers of __Caltha palustris__, was submitted to both thermal isomerization and I~2~‐catalyzed photoisomerization. The structures of the main produc
(E/Z)-Isomerization of (all-E)-5,6-Diepikarpoxanthin
✍ Scribed by Péter Molnár; József Deli; Gyula Tóth; Adrian Häberli; Hanspeter Pfander
- Publisher
- John Wiley and Sons
- Year
- 2002
- Tongue
- German
- Weight
- 158 KB
- Volume
- 85
- Category
- Article
- ISSN
- 0018-019X
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📜 SIMILAR VOLUMES
1H and 15N NMR chemical shifts of 12 semicyclic amidinium salts are reported. Their E/Z equilibria in solution were analyzed by 1D and 2D 1H and 15N NMR techniques. In the solid state the Z-conÐguration is observed.
## Abstract The temperature and concentration dependence of the ^1^H NMR spectra of four anilinomethylenemalonic acid derivatives were determined in CDCl~3~ and DMSO‐__d__~6~ to assign the __E__–__Z__ isomers and to investigate the formation of intra‐ and intermolecular hydrogen bonds. Chemical shi