Gas chromatographic resolution of carbohydrate enantiomers. A new chiral phase for pentoses
✍ Scribed by Benecke, I. ;Schmidt, E. ;König, W. A.
- Publisher
- John Wiley and Sons
- Year
- 1981
- Tongue
- English
- Weight
- 203 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0935-6304
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✦ Synopsis
Abstract
New chiral polymers have been prepared by conversion of cyano groups of polysiloxanes XE‐60 and OV‐225 into carboxylic groups and subsequent coupling to give the respective S‐valine‐R‐α‐phenyl‐ethyl amide. In contrast to the corresponding stationary phases with S‐α‐phenylethyl amide groups, which have been used for the resoultion of trifluoroacetylated hexose derivatives, the new phase show high enantioselectivity for pentose and 6‐deoxyhexose derivatives.
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Several benzodiazepines were enantioresolved on a new carbohydrate chiral stationary phase based on maltooligosaccharides. The role of organic modifier, ionic strength, pH and temperature are examined and the results are discussed. In general, selectivity and retention were found to decrease with in