13C NMR Spectra of tocopherols and 2,2-dimethylchromanols
โ Scribed by M. Matsuo; S. Urano
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- French
- Weight
- 328 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0040-4020
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๐ SIMILAR VOLUMES
## Abstract The ^13^C NMR spectra of eight eudesmanolides have been measured and the chemical shifts assigned. Among the compounds studied are the naturally occurring ฮฑโcyclocostunolide, santamarin, arbsculin A and reynosin.
REFERENCE DATA tene rings of 1-6 therefore invariably induced shielding of the spiro carbons. This cannot be explained entirely on the basis of a changed inductive effect owing to higher homologation, because such an effect will contribute only 1.5 ppm towards shielding.' It is likely that introduct
## Abstract The total assignment of the ^13^C NMR spectra of (__E__)โ2โpyridinecarbaldehyde pyridinโ2โฒโylhydrazone and eight analogues is reported. The assignment of the spectra was achieved by comparison with data from the hydrazone precursors and other similar compounds.