Reversed-Phase Liquid Chromatographic Separation of Enantiomeric and Diastereomeric Bases Related to Chloramphenicol and Thiamphenicol
作者:Joseph Gal、Sabine Meyer-Lehnert
DOI:10.1002/jps.2600771215
日期:1988.12
intermediates in their synthesis and optical resolution. In this report, reversed-phase HPLC methods are described for the separation of enantiomeric and diastereomeric bases of the two drugs and of two closely related bases used in some syntheses of the drugs. The stereoisomeric bases were derivatized with a homochiral isothiocyanate and the resulting diastereomeric thioureas were separated on C18 columns
重要的抗菌剂氯霉素和甲砜霉素是N-酰化胺,其化学结构包括两个手性中心。每种药物都是R,R构型的单一对映体。药物的N-去酰化碱基是其合成和光学拆分的重要中间体。在本报告中,描述了反相HPLC方法,用于分离两种药物的对映异构和非对映异构碱基以及在某些药物合成中使用的两个紧密相关的碱基。用高手性异硫氰酸酯衍生立体异构体碱基,并在甲醇,水混合物为流动相的C18色谱柱上分离所得非对映异构硫脲,并在254 nm处检测。因此,用2,3,4,6-四-O-乙酰基-β-D-吡喃葡萄糖基异硫氰酸酯衍生化后,可以分离氯霉素的四个立体异构碱基及其未硝化的类似物。该试剂还可以从其立体异构体中分离出噻吩酚类碱的对巯基甲基类似物的D-苏式异构体。用(R)-α-甲基苄基异硫氰酸酯作为衍生剂类似地分离噻吩酚类碱的立体异构体。用非手性试剂异硫氰酸苄酯衍生化后,可色谱分离氯霉素碱和噻吩酚碱的非对映异构体。开发的程序可能对确定研究和质量控制中药物的立体异构体组成有用,