Abstract
Direct chiral separation of the enantiomers of spirobrassinin, 1-methoxyspirobrassinin and ten novel cis- and trans-diastereoisomers of 2-amino analogs of indole phytoalexin 1-methoxyspirobrassinol methyl ether on macrocyclic glycopeptide-based chiral stationary phase (CSP) with teicoplanin (Chirobiotic T) was studied. Normal phase eluents containing n-hexane with modifiers ethanol and 2-propanol were used. The effects of mobile phase composition, structure of the analytes and temperature were investigated. Chiral resolution on teicoplanin CSP was achieved only in the case of trans-diastereoisomers. The van’t Hoff plots were found to show linear behavior in all cases. It was found that studied normal phase enantioseparations were enthalpy driven. The elution order of the enantiomers was determined in some cases.
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Acknowledgments
The authors (TG and JP) are grateful to the Hermes LabSystems for the technical support of this work. This work was supported by the Slovak Research and Development Agency under the contract No. APVV-0514-06.
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Gondová, T., Petrovaj, J., Kutschy, P. et al. Enantioseparation of Novel Amino Analogs of Indole Phytoalexins on Macrocyclic Glycopeptide-Based Chiral Stationary Phase. Chromatographia 74, 751–757 (2011). https://doi.org/10.1007/s10337-011-2143-y
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DOI: https://doi.org/10.1007/s10337-011-2143-y