Enantiomer Separation by Countercurrent Chromatography Using Cinchona Alkaloid Derivatives as Chiral Selectors
作者:Pilar Franco、Javier Blanc、Wolfgang R. Oberleitner、Norbert M. Maier、Wolfgang Lindner、Cristina Minguillón
DOI:10.1021/ac020209q
日期:2002.8.1
Cinchona-derived anion-exchange-type chiral selectors have been adapted and employed in countercurrent chromatography (CCC) for the separation of enantiomers of N-derivatized amino acids and 2-aryloxypropionic acids. The accurate optimization of the enantioseparation in terms of solvent system composition, pH values, ionic strength, and CCC operating conditions was performed. A wide range of solvent
金鸡纳衍生的阴离子交换型手性选择剂已被改编并用于逆流色谱法(CCC)中,用于分离N-衍生氨基酸和2-芳氧基丙酸的对映异构体。根据溶剂体系组成,pH值,离子强度和CCC操作条件对对映体进行了精确的优化。评价了多种溶剂混合物。在诸如乙酸铵缓冲液/叔戊醇/甲醇/庚烷,尤其是乙酸铵缓冲液/甲基异丁基酮或二异丙基醚等体系中获得了成功的分离度。在122 mL固定相中使用10 mM浓度的手性选择剂,一次即可完全分离出多达300 mg(0.92 mmol)的N-(3,5-二硝基苯甲酰基)-(+/-)-亮氨酸。该量可以增加到900 mg(2。当应用pH区精制模式时(77 mmol)。本文介绍的结果说明了CCC作为制备对映异构体分离技术的巨大潜力。