Indirect high-performance liquid chromatographic enantioresolution of highly constrained α-substituted proline analogues as (S)-N-(4-nitrophenoxycarbonyl)phenylalanine methoxyethyl ester derivatives is reported. The diastereoisomers formed were analysed under reversed-phase conditions by means of gradient elution. Baseline separation was achieved for all of the derivatives of each investigated analyte. The elution sequence was determined, and this allows identification of the configuration of the a-substituted proline analogues in the peptide epimers, resulting from use of the racemates of proline analogues in peptide synthesis.
|Number of pages||13|
|Journal||Journal of Liquid Chromatography and Related Technologies|
|Publication status||Published - márc. 5 2004|
ASJC Scopus subject areas
- Analytical Chemistry
- Pharmaceutical Science
- Clinical Biochemistry