## Abstract High field high resolution ^13^C NMR spectroscopy allows the quantitative determination of a mixture of the four diastereomers in racemic α‐tocopherol.
A general and accurate nmr determination of the enantiomeric purity of α-aminoacids and α-aminoacid derivatives
✍ Scribed by Monique Calmes; Jacques Daunis; Robert Jacquier; Jean Verducci
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- French
- Weight
- 589 KB
- Volume
- 43
- Category
- Article
- ISSN
- 0040-4020
No coin nor oath required. For personal study only.
✦ Synopsis
Derivatfzatfon of oxmfnoacids. a-aminoesters and *amlnolactones as N-acetyl dertvatfves allow the accurate t?HR determination of the enantfomerfc purity. In these conditions the major coordfnatfon site with a chlral shfjt reagent will correspond to the Nm observation sfte. Ezperfmentat factors teadfng to the highest M6 values are ascertatned. No ztratghtforward correlation wtth absolute conftguratlons can be establtshed.
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