Summary
The indirect stereochemical resolution of the enantiomers of phenylalanine analogs was studied by high-performance liquid chromatographic methods. The resolution was performed by applying pre-column derivatization with (S)-N-(4-nitrophenoxycarbonyl)phenylalanine methoxyethyl ester, (S)-NIFE, as a new chiral derivatizing agent. Its applicability is demonstrated by the derivatization and separation of a series of ring-and α-methyl-substituted phenylalanines and phenylalanine amides, and especially by the derivatization of sterically hindered, less reactive α-methyl-substituted phenylalanine analogs. The diastereomeric, derivatives produced were separated by reversed-phase high-performance liquid, chromatography. The conditions of both derivatization and separation were optimized. The method described offers good enantioselectivity for various chiral amino compounds derived from chemo-enzymatic processes.
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Olajos, E., Peter, A., Casimir, R. et al. HPLC enantioseparation of phenylalanine analogs by application of (S)-N-(4-nitrophenoxycarbonyl)phenylalanine methoxyethyl ester as a new chiral derivatizing agent. Chromatographia 54, 77–82 (2001). https://doi.org/10.1007/BF02491837
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DOI: https://doi.org/10.1007/BF02491837