Enantiomers polysaccharide phenylcarbamates

Polysaccharide phenylcarbamate derivatives have a great advantage for the easy preparation of a film (membrane), which can be used as a new device for the rapid separation of enantiomers through enantioselective adsorption [105]. Photoresponsive cellulose and amylose membranes bearing azobenzene residues... 

Okamoto, Y. Kawashima, M., and Hatada, K. (1984) Useful chiral packing materials for high-performance liquid chromatographic resolution of enantiomers phenylcarbamates of polysaccharides coated on silica gel,... 

HPLC was used to evaluate the enantiomeric resolution of dihydrope-pidine enantiomers (including nimodipine), using phenylcarbamates of polysaccharides as a chiral stationary phase [35]. A column (25 cm x 4.6 mm) packed with the arylcarbamate derivatives of amylase, cellulose, and xylem was used. Detection was effected using polarimetry at 435 nm. Using xylem bis-(3,5-dichlorophenylcarbamate) and a mobile phase (flow rate of 0.5 mL/min) of 0.1%, diethylamine in hexane-propan-2-ol (17 3) yielded separation of nimodipine. 

Y. Okamoto, M. Kawashima, and K. Hatada, Chromatographic resolution. 7. Useful chiral packing materials for high-performance hquid chromatographic resolution of enantiomers Phenylcarbamates of polysaccharides coated on sihca gel, J. Am. Chem. Soc. 106 (1984), 5357-5359. 

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