共查询到19条相似文献,搜索用时 109 毫秒
1.
高效毛细管电泳 ( HPCE)在手性拆分中的应用近年受到普遍关注。含有手性添加剂环糊精 ( CD)及其衍生物的毛细管区带电泳 ( CZE)和胶束电动毛细管色谱 ( MECC)拆分体系方面研究非常活跃。综述了 CD- CZE和 CD-MECC体系 ,探讨了各体系的拆分机理和各实验条件对拆分结果的影响。 相似文献
2.
3.
4.
氨基酸对映体的手性拆分 总被引:1,自引:0,他引:1
氨基酸对映体的分离是生命科学的基础,主要方法有高效毛细管电泳法、高效液相色谱法、薄层色谱法和气相色谱法等,高效液相色谱法是广泛应用的手性氨基酸拆分方法。本文介绍了间接法和直接法手性拆分的分离机理,并详细介绍了Pirkle手性固定相、胶束手性固定相、包合手性固定相、配体交换手性固定相、蛋白质手性 j固定相等5类手性固定相的应用。 相似文献
5.
《高校化学工程学报》2016,(6)
手性离子液体作为离子液体家族的重要一员,不仅拥有蒸汽压低、热稳定性好、较好的结构可调性等优良性能,同时具备较高的手性识别能力,近年来受到国内外学者的密切关注,将其作为手性选择剂广泛应用于对映体拆分领域,展现出良好的效果。针对近年来手性离子液体在液相色谱、毛细管电泳、气相色谱、液液萃取等领域对映体拆分方面的研究进展进行综述,对其拆分机理进行比较分析,指出现阶段手性离子液体在对映体拆分应用中存在的问题,并对其发展前景进行了展望。 相似文献
6.
以组氨酸-β-环糊精(β-CD-E_2)衍生物作为手性选择剂,利用原位聚合反应制得新型β-CD衍生物手性高效毛细管电泳(HPCE)整体柱,将其应用于手性药物羟丙哌嗪的消旋体拆分。分别探究了不同缓冲体系的洗脱能力、缓冲液pH对分离的影响以及羟丙哌嗪手性拆分的线性范围。结果表明,在最佳条件下,羟丙哌嗪对映体在β-CD-E_2整体柱上能得到较好拆分,分离度Rs达到40.52,且羟丙哌嗪浓度在9.8×10~(-6)~2.0×10~(-5)mol/L范围内与对映体峰高、峰面积具有一定的线性关系。此工作将β-CD-E_2作为HPCE固定相,为手性药物羟丙哌嗪建立了一种新的分离分析体系。 相似文献
7.
8.
HPLC手性流动相拆分法在分离药物对映体中的应用 总被引:1,自引:0,他引:1
高效液相色谱是拆分手性药物的重要手段。简要介绍了不同的手性流动相添加剂及其拆分机理,综述了2000年以来高效液相色谱手性流动相拆分法在分离药物对映体中的应用。 相似文献
9.
10.
高效液相色谱(HPLC)手性固定相是手性色谱发展的关键,应用手性固定相对药物对映体的拆分在药物工业中起着重要的作用。综述了高效液相色谱几种主要手性固定相的特性,并重点对其中4种手性固定相在药物分析中的应用作了介绍。 相似文献
11.
制备了葡萄糖、纤维二糖、棉子糖、乳糖的高效液相色谱手性固定相,并在正相条件下对32种手性化合物进行了拆分,结果表明,四种手性固定相分别分开手性药物11,14,17,11种,拆分效果良好。 相似文献
12.
13.
14.
15.
To investigate the stereo coordination effect on the optical resolution, chiral monomer (+)‐5‐oxobornyl methacrylate (OBMA) was synthesized and then polymerized under various conditions. In this work, optical resolution was carried out in the presence of chiral polymers having (+)‐5‐oxobornyl moieties as chiral stationary phase (CSP) for high‐performance liquid chromatography (HPLC). Chiral polymer was immobilized on the surface of hydrophobic silica gel, and the chiral recognition ability of the chiral polymers was investigated. Effects of operation temperature and eluent flow rate on the chromatographic resolutions were investigated. The results of optical resolution were compared with those observed in our previous paper using chiral polymers (CSP‐1 and CSP‐2) having 2,3‐dihydroxybornyl moieties as chiral stationary phases. It was found that the recognition ability of poly(OBMA) is greater than those of CSP‐1 and CSP‐2. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 72: 677–682, 1999 相似文献
16.
头孢菌素类抗生素分析方法研究进展 总被引:5,自引:0,他引:5
本文简要介绍了头孢菌素类抗生素的概况,及高效液相色谱法、高效毛细管电泳、电化学法、荧光分析法、化学发光法和紫外可见分光光度法等分析方法在头孢菌素类抗生素分析中的应用。 相似文献
17.
Udo Wrsdrfer Fritz Vgtle Frank Glorius Andreas Pfaltz 《Advanced Synthesis \u0026amp; Catalysis》1999,341(5):445-448
The synthesis of the new planar chiral heterocyclic nitrogen ligand pyrid-2-yl[2](1,4)benzeno[2](5,8)quinolino-phane ( 1 with [2.2]paracyclophane-skeleton is described. The enantiomeric resolution is achieved by HPLC. The CD-spectra of 1 and of its chiral quinoline precursor are recorded. The enantiomerically pure title compound 1 is used in copper-catalyzed asymmetric cyclopropanation of styrene and in asymmetric iridium-catalyzed transfer-hydrogenation of acetophenone. 相似文献
18.
Optically active exo-exo-2,3-camphanediol (CPO) (3) was synthesized from (+)-camphor. Chiral polymers poly(CPO-co-TDI) ( 6 ) and poly(CPO-co-IPDI) ( 7 ) were synthesized by the step polymerization of chiral compound CPO ( 3 ) with toluene-2,4-diisocyanate (TDI) and isophorone diisocyanate (IPDI). To investigate the stereo structure of the chiral polymers, two kinds of model compounds, exo-exo-2,3-di[(phenylamido)oxy]camphane ( 4 ) and exo-exo-2,3-di[(propylamido)oxy]camphane ( 5 ), related to polymers ( 6 ) and ( 7 ) were synthesized. Chiroptical characteristics and stereo structures of the chiral polymers were investigated using a circular dichroic spectrometer. The results obtained in this investigation suggest that the chiral polymers ( 6 ) and ( 7 ) have no one-handed helix conformation. The optical resolution ability as chiral adsorbent for HPLC of the chiral polymers was investigated. It was found that chiral polymers ( 6 ) and ( 7 ) are effective for the optical resolution of some racemates. © 1995 John Wiley & Sons, Inc. 相似文献