Abstract
A novel series of nine chiral analogs of spirobrassinin, which have potential biological activity, was separated for the first time on three different derivatized cyclofructan chiral stationary phases in the normal phase mode. The effects of mobile phase composition, the type and concentration of polar modifier, additives, and the analyte structure on the retention and enantioseparation were studied. The results proved that for cyclofructan-based chiral stationary phases, the R-naphthylethyl carbamate cyclofructan 6 provides the best separation efficiency for the analyzed compounds. The effect of temperature on the separation was also investigated and the corresponding thermodynamic parameters were evaluated from linear Van’t Hoff plots (lnk or lnα versus 1/T). It was found that the enantioseparation was enthalpy controlled. In addition, the elution order of the enantiomers was determined in all the cases.
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The authors gratefully acknowledge the financial support received from the Scientific Grant Agency VEGA of Slovak Republic (Grant No. 1/0253/16).
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Moskaľová, M., Kozlov, O., Gondová, T. et al. HPLC Enantioseparation of Novel Spirobrassinin Analogs on the Cyclofructan Chiral Stationary Phases. Chromatographia 80, 53–62 (2017). https://doi.org/10.1007/s10337-016-3212-z
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DOI: https://doi.org/10.1007/s10337-016-3212-z