Chiral discrimination by NMR spectroscopy of ephedrine and N-methylephedrine induced by β-cyclodextrin, heptakis(2,3-di-O-acetyl)β-cyclodextrin, and heptakis (6-O-acetyl)β-cyclodextrin
✍ Scribed by Ulrike Holzgrabe; Henning Mallwitz; Sarah K. Branch; Terry M. Jefferies; Michael Wiese
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 234 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0899-0042
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Heptakis(2,6-di-O-methyl-3-O-pentyl)-b-cyclodextrin was monofunctionalized by the regioselective introduction of exactly one x-epoxyoctyl group at the primary site of the cyclodextrin. The site-specifically substituted cyclodextrin was immobilized to commercially available aminopropyl silica by nucl
The single isomer, fully and permanently charged heptakis-2,3-di-. methyl-6-sulfato --cyclodextrin was used to study the complexation behavior of the enantiomers of noncharged analytes in capillary electrophoresis. Separation selectivities were calculated from the measured effective mobilities and