Enantioseparation of nine indanone and tetralone derivatives by HPLC using carboxymethyl-β-cyclodextrin as the mobile phase additive

High-performance liquid chromatography (HPLC) is a powerful method in the area of chiral separation. In this study, a method of HPLC using carboxymethyl-beta-cyclodextrin (CM-beta-CD) as chiral selector was developed for enantioseparation of nine indanone and tetralone derivatives. The separation was performed on a conventional C-18 column. The optimal mobile phase was a mixture of methanol and 0.05 mol/L phosphate buffer at pH 1.8 (55: 45, v/v) containing 22.9 mmol/L CM-beta-CD. Under such conditions, the resolutions of all analytes were over 1.8 except for Compound F. The results of the study indicate the presence of a complex with 1: 1 stoichiometry of the inclusion complex. In addition, it can be inferred from thermodynamic analysis that the behavior of formation of the inclusion complex and enantioseparation occurred simultaneously, while they were driven by different forces. The effect of analyte structure is also discussed.