title: High-performance liquid chromatographic separation of stereoisomers of N-phthaloyl-protected amino acids and dipeptidomimetics.
abstract: The stereoisomers of N-phthaloyl-protected amino acids and dipeptidomimetics were separated on macrocyclic glycopeptide and cellulose-based chiral stationary phases (CSPs) in the RP and polar-ionic modes. The effects of the organic modifier, the mobile phase composition, and the pH on the separations were investigated. Optimization of these separations was achieved through variation of the mobile-phase additive combinations. The elution sequence was determined for some of the samples. A practical application for the monitoring of the reaction conditions for N-phthaloylation of (S)-Phe was demonstrated.
authors.affiliation: Department of Inorganic and Analytical Chemistry, University of Szeged, H-6720 Szeged, Dóm tér 7, Hungary.
authors.forename: István
authors.initials: I
authors.lastname: Ilisz
authors.forename: Steven
authors.initials: S
authors.lastname: Ballet
authors.forename: Karolien
authors.initials: K
authors.lastname: Van Rompaey
authors.forename: Rien
authors.initials: R
authors.lastname: De Wachter
authors.forename: Dirk
authors.initials: D
authors.lastname: Tourwé
authors.forename: Daniel W
authors.initials: DW
authors.lastname: Armstrong
authors.forename: Antal
authors.initials: A
authors.lastname: Péter
mesh_terms: D000596:Amino Acids / Q000737:chemistry* / Q000302:isolation & purification*; D002623:Chemistry Techniques, Analytical / Q000379:methods; D002845:Chromatography / Q000379:methods; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D006020:Glycopeptides / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D013058:Mass Spectrometry / Q000379:methods*; D008956:Models, Chemical; D015394:Molecular Structure; D010455:Peptides / Q000737:chemistry; D015203:Reproducibility of Results; D013237:Stereoisomerism; D014466:Ultraviolet Rays
chemical_list: D000596:Amino Acids; D006020:Glycopeptides; D010455:Peptides