Abstract
The development of high-performance liquid chromatography (HPLC) methods using derivatized amylose chiral stationary phases has permitted preparative enantioseparations of substituted 4-oxo-1,4-dihydroquinoline-3-carboxamide derivatives with satisfactory yields. These compounds constitute new potent selective agonists of the cannabinoid CB(2) receptor. Analytical enantioseparation methods using UV detection were validated to determine the enantiomeric purity of these compounds. Linear calibration curves in the range from 0.18 to 0.40 mM were obtained; repeatability, limits of detection (LOD), and quantification (LOQ) were determined: LOD varied, for the various solutes, from 0.5 to 1.2 μM. All the separated compounds were prepared with high enantiomeric purities superior to 99.3% Absolute configuration of the enantiomers was unequivocally established by single crystal X-ray diffraction method and correlated to the chiroptical properties of isolated enantiomers.
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