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HPLC enantioseparation of beta2-homoamino acids using crown ether-based chiral stationary phase. 2009
Róbert Berkecz, and
István Ilisz, and
Aleksandra Misicka, and
Dagmara Tymecka, and
Ferenc Fülöp, and
Hee Jung Choi, and
Myung Ho Hyun, and
Antal Péter
Department of Inorganic and Analytical Chemistry, University of Szeged, Szeged, Hungary.
RP high-performance liquid chromatographic methods were developed for the enantioseparation of eleven unusual beta(2)-homoamino acids. The underivatized analytes were separated on a chiral stationary phase containing (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid as chiral selector. The effects of organic (alcoholic) and acidic modifiers, the mobile phase composition and temperature on the separation were investigated. The structures of the substituents in the alpha-position of the analytes substantially influenced the retention and resolution. The elution sequence was determined in some cases: the S enantiomers eluted before the R enantiomers.
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