| 18242919 |
Belaz KR, Coimbra M, Barreiro JC, Montanari CA, Cass QB: Multimilligram enantioresolution of sulfoxide proton pump inhibitors by liquid chromatography on polysaccharide-based chiral stationary phase. J Pharm Biomed Anal. 2008 May 12;47(1):81-7. Epub 2007 Dec 23.
The enantiomers of sulfoxide proton pump inhibitors--omeprazole, lansoprazole, rabeprazole and Ro 18-5364--were enantiomerically separated by liquid chromatography at multimilligram scale on a polysaccharide-based chiral stationary phase using normal and polar organic conditions as mobile phase. The values of the recovery and production rate were significant for each enantiomer; better results were achieved using a solid-phase injection system. However, this system was applied just for the enantiomeric separation of omeprazole to demonstrate the applicability of this injection mode at milligram scale. The chiroptical characterization of the compounds was performed using a polarimeter and a circular dichroism detector. The higher enantiomeric purity obtained for the isolated enantiomers suggests that the methods here described should be considered as a simple and rapid way to obtain enantiomeric pure standards for analytical purpose. |
62(0,2,2,2) |