Comparisons are made for separations attained in normalphase HPLC and TLC involving N-carbobenzyloxy-glycyl-L-proline and (+/−)−10-camphorsulfonic acid as chiral mobile phase additives/chiral counter ions (CMA). Possible reasons for differences in stereoselectivity of β-cyclodextrin CMA and chiral stationary phases (CSP) are discussed. In addition, differences in solubility and proposed separation mechanisms for native cyclodextrins (CD) versus derivatized CD are discussed. Inherent differences in high performance liquid chromatographic (HPLC) and thin-layer chromatographic (TLC) methods are outlined. The pros and cons of using HPLC and TLC are considered.
展开▼
