title: High-performance liquid chromatographic enantioseparation of beta-3-homo-amino acid stereoisomers on a (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid-based chiral stationary phase.
abstract: High-performance liquid chromatographic methods were developed for the separation of the enantiomers of thirteen unusual beta-3-homo-amino acids and three of its ethyl esters on a chiral stationary phase containing (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid as chiral selector. The effects of the mobile phase composition and the acidic modifiers on the separation were investigated. The structures of the substituents in beta-position substantially influenced the retention and enantioseparation. The influence of ionic strength on the enantioseparation was established experimentally. The elution sequence was determined in all cases.
authors.affiliation: Department of Inorganic and Analytical Chemistry, University of Szeged, H-6720 Szeged, Dóm tér 7, Hungary.
authors.forename: Róbert
authors.initials: R
authors.lastname: Berkecz
authors.forename: István
authors.initials: I
authors.lastname: Ilisz
authors.forename: Ferenc
authors.initials: F
authors.lastname: Fülöp
authors.forename: Zoltán
authors.initials: Z
authors.lastname: Pataj
authors.forename: Myung Ho
authors.initials: MH
authors.lastname: Hyun
authors.forename: Antal
authors.initials: A
authors.lastname: Péter
mesh_terms: D000596:Amino Acids / Q000032:analysis* / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D043844:Crown Ethers / Q000737:chemistry*; D015394:Molecular Structure; D013237:Stereoisomerism
chemical_list: D000596:Amino Acids; D043844:Crown Ethers; C090732:18-crown-6 2,3,11,12-tetracarboxylic acid