Enantiomeric separation of a group of chiral dihydropyridines by electrokinetic chromatography
Identifiers
Permanent link (URI): http://hdl.handle.net/10017/1331DOI: 10.1002/(SICI)1522-2683(20000501)21:8<1565::AID-ELPS1565>3.0.CO;2-2
ISSN: 0173-0835
Publisher
John Wiley & Sons
Date
2000Funders
The authors thank the Comisión Interministerial de Ciencia y Tecnologia (Spain) for project PB98-0709 and Dr. Alvarez-Builla (Universidad de Alcala, Spain) for the kind gift of DHPs used in this work.
Bibliographic citation
Electrophoresis, 2000, v. 21, n. 8, p. 1565-1573
Keywords
Electrokinetic chromatography
Enantiometric separation
1,4-Dihydropiridines
Project
info:eu-repo/grantAgreement/CICYT//PB98-0709/ES//
Document type
info:eu-repo/semantics/article
Version
info:eu-repo/semantics/publishedVersion
Publisher's version
http://dx.doi.org/10.1002/(SICI)1522-2683(20000501)21:8<1565::AID-ELPS1565>3.0.CO;2-2Rights
© WILEY-VCH, 2000
Access rights
info:eu-repo/semantics/openAccess
Abstract
Electrokinetic chromatography (EKC) was employed to achieve the enantiomeric separation of a group of chiral 1,4-dihydropyridines (DHPs) with pharmacological activity. Micelles of bile salts alone or mixed with neutral cyclodextrins, micelles of sodium dodecyl sulfate (SDS) mixed with neutral cyclodextrins, and anionic cyclodextrin derivatives, i.e., carboxymethyl-γ-cyclodextrin (CM-γ-CD), carboxymethyl-β-cyclodextrin (CM-β-CD), and succinylated β-cyclodextrin (Succ-β-CD), were employed as pseudostationary phases. The enantiomeric separation ability of these chiral selectors with respect to DHPs was studied in different experimental conditions. CM-β-CD was shown to be the best chiral selector to perform the enantiomeric separation of DHPs by EKC. Next, the influence of the CM-β-CD concentration, the pH and nature of the buffer, the temperature, and the applied voltage on the enantiomeric resolution of DHPs was studied. The use of a 50 mm ammonium acetate buffer, pH 6.7, 25 mm in CM-β-CD together with an applied voltage of 15 or 20 kV, and a temperature of 15°C enabled the individual enantiomeric separation of twelve DHPs, each one into its two enantiomers, and their separation in multicomponent mixtures of up to six DHPs into all their enantiomers.
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