[en] A non-aqueous capillary electrophoretic method developed with quinine and tert.-butyl carbamoylated quinine as chiral selectors for the enantioseparation of N-protected amino acids was applied to the investigation of other quinine derivatives as chiral additives. The optimum composition of the background electrolyte was found to be 12.5 mM ammonia, 100 mM octanoic acid and 10 mM chiral selector in an ethanol-methanol (60:40, v/v) mixture. Under these conditions, a series of chiral acids, as various benzoyl, 3,5-dinitrobenzoyl and 3,5-dinitrobenzyloxycarbonyl amino acid derivatives were investigated with regards to selectand-selector relationships and enantioselectivity employing quinine, quinidine, cinchonine, cinchonidine, tert.-butyl carbamoylated quinine, tert.-butyl carbamoylated quinidine, dinitrophenyl carbamoylated quinine and cyclohexyl carbamoylated quinine as chiral selector.
Disciplines :
Pharmacy, pharmacology & toxicology
Author, co-author :
Piette, Véronique; Université de Liège - ULiège > Analyse des médicaments
Fillet, Marianne ; Université de Liège - ULiège > Département de pharmacie > Analyse des médicaments
Lindner, W.; Université de Vienne > Autriche
Crommen, Jacques ; Université de Liège - ULiège > Département de pharmacie > Analyse des médicaments
Language :
English
Title :
Non-aqueous capillary electrophoretic enantioseparation of N-derivatized amino acids using cinchona alkaloids and derivatives as chiral counter-ions.
Publication date :
2000
Journal title :
Journal of Chromatography. A
ISSN :
0021-9673
eISSN :
1873-3778
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
875
Issue :
1-2
Pages :
353-60
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]