Comparative Enantioseparation of Crufomate with Cellulose- and Amylose-based Chiral Stationary Phases on Reverse-Phase and Normal-Phase High-Performance Liquid Chromatography
作者:Tingting Chai、Xueqing Wang、Mei Bie、Shouhui Dai、Hualin Zhao、Shuming Yang、Jing Qiu
DOI:10.14233/ajchem.2013.12908
日期:——
This study used cellulose- and amylose-based chiral stationary phases to comparatively separate crufomate enantiomers on reverse-phase and normal-phase high performance liquid chromatography (RP-HPLC and NP-HPLC). The baseline separations were obtained on Phenomene Lux cellulose-1, Lux cellulose-2 and Lux amylose-2 with 2-propanol/hexane and on Lux cellulose-1 and Lux amylose-2 with acetonitrile/water as mobile phase. The results of optical rotation detections showed that (+)-enantiomer of crufomate was firstly eluted on Lux cellulose-1 and Lux amylose-2 both on NP-HPLC and RP-HPLC, while the (-)-enantiomer was firstly eluted on Lux cellulose-2 and Lux cellulose-3 on NP-HPLC. The influences of column temperature from 5-40 ºC on separation were investigated on three chiral stationary phases. The thermodynamic parameters were calculated using vant Hoff equations to study the enthalpy-driven and entropy-driven process. This work will be helpful to prepare optical pure enantiomers and establish efficient analytical method for study on enantioselective behaviours of crufomate.
本研究使用纤维素和直链淀粉基手性固定相,通过反相和正相高效液相色谱法(RP-HPLC和NP-HPLC)对曲氟酯对映体进行分离。在Phenomene Lux纤维素-1、Lux纤维素-2和Lux直链淀粉-2上,以2-丙醇/己烷为流动相;在Lux纤维素-1和Lux直链淀粉-2上,以乙腈/水为流动相,获得了基线分离。旋光检测结果表明,在NP-HPLC和RP-HPLC上,曲氟酯的(+)对映体首先在Lux纤维素-1和Lux直链淀粉-2上洗脱,而(-)对映体首先在Lux纤维素-2和Lux纤维素-3上洗脱。研究了5-40℃的柱温对三种手性固定相分离的影响。使用范特霍夫方程计算了热力学参数,以研究焓驱动和熵驱动过程。这项工作将有助于制备光学纯的对映体,并建立研究曲氟酯对映体选择性行为的高效分析方法。