2-O-（2-羟丁基）-β-环糊精在非水毛细管电泳中拆分手性药物的研究

以2—O-（2一羟丁基）-β-环糊精（HB-β-CD）为手性选择剂,对普萘洛尔、山茛菪碱、异丙嗪3种碱性手性药物进行非水毛细管电泳拆分。考察了有机溶剂、电解质、手性选择剂浓度以及pH值对分离度的影响。研究结果表明：普萘洛尔、山莨菪碱和异丙嚷3种碱性手性药物全部达到基线分离。可见HB-β-CD在碱性药物拆分方面具有特殊能力,为碱性手性药物的拆分提供了一种准确、简便的分析方法。     

天冬氨酸-β-环糊精在毛细管电泳中拆分手性药物罗格列酮

本文建立了一种快速、简单拆分手性药物"罗格列酮"的新方法。采用本实验室合成的天冬氨酸-β-环糊精为手性选择剂,在毛细管区带电泳中对罗格列酮进行拆分,通过优化影响实验的主要因素(手性选择剂浓度、缓冲溶液pH、柱温及分离电压),得到了使罗格列酮达到基线分离的最佳实验条件。     

逆流色谱在外消旋体分离中的应用

本文全面深入地综述了逆流色谱拆分消旋体的原理和特点,阐述了手性选择剂和溶剂系统选择在逆流色谱分离消旋体中的重要性,详细总结了手性选择剂和溶剂系统具有发展潜力的研究新进展。     

羧甲基聚合-β-环糊精在毛细管电泳中分离酪氨酸对映体

采用羧甲基聚合-β-环糊精为手性选择剂对酪氨酸对映体以毛细管区带电泳形式进行手性拆分。考察了手性选择剂浓度、背景电解质溶液pH值、柱温及分离电压对分离的影响。在优化的实验条件下,使酪氨酸对映得到了基线分离。     

基于离子液体辅助的毛细管电泳法手性拆分阿替洛尔对映异构体

建立了以羧甲基-β-环糊精(CM-β-CD)为手性选择剂,以非手性离子液体溴化1-十二烷基-3-甲基咪唑(C12MIm Br)为手性分离添加剂的毛细管电泳分离阿替洛尔对映异构体的方法。实验详细考察了运行缓冲溶液p H值与浓度、手性选择剂用量、离子液体用量、分离电压等影响手性拆分的重要因素。同时,与未添加离子液体的毛细管电泳分离情况进行了对比,发现离子液体对手性药物的拆分有协同作用,不仅能够增加对映异构体的分离度,还能有效地抑制毛细管内壁对样品分子的吸附作用,改善峰形。     

非手性柱高效液相色谱法拆分盐酸西布曲明

采用非手性的Cu色谱柱,通过在流动相中加入手性选择剂β-环糊精和在样品中加入β-环糊精的方法实现对盐酸西布曲明对映体的拆分.流动相组成为含β-环糊精的甲醇-水(50∶50,V/V,pH=6).当手性选择剂β-环糊精的浓度为0.8mmol/L时,盐酸西布曲明对映体在进样后的5.7min得到了基线分离.     

高效毛细管电泳在手性药物分析中的应用

近年来,手性药物的毛细管电泳拆分技术发展迅速,文章综述了毛细管电泳法拆分手性药物的机理、方法及应用,并重点介绍近年来各类手性选择剂的发展现状。     

开管毛细管电色谱在手性药物拆分方面的研究进展

手性药物的有效拆分以及优化拆分条件对医药行业有着重大意义。本文就开管毛细管电色谱技术及其对手性药物的拆分研究进行展开简要概述综述,分别对糖类衍生物、金属-有机骨架化合物、大环抗生素、蛋白质等物质作为开管毛细管电色谱柱手性选择剂的制备和应用,以及各自的优缺点进行了简要综述,并对其做出展望,为开管毛细管电色谱技术对手性药物的拆分研究提供理论参考。     

HPCE法手性拆分(R)-和(S)-3-羟基戊二酸乙酯

以β-环糊精(β-CD)为手性选择剂,采用毛细管区带电泳(CZE)对(R)-和(S)-3-羟基戊二酸乙酯进行手性拆分。通过考察手性选择剂浓度、电泳缓冲液pH、柱温以及分离电压对分离的影响,建立了比较理想的毛细管电泳手性拆分方法。在30 mmol/Lβ-CD、pH 5.0、柱温25℃以及分离电压20 kV分离条件下,(R)-和(S)-3-羟基戊二酸乙酯得到了完全分离。该分离方法具有较好的重复性和稳定性。     

毛细管电泳在手性物质分离中的应用

综述了近年来毛细管电泳在手性物质分离中的应用情况。对手性拆分模式及几种主要手性选择剂简明地作了介绍。     

Synthesis of Cellulose-2,3-bis(3,5-dimethylphenylcarbamate) in an Ionic Liquid and Its Chiral Separation Efficiency as Stationary Phase

A chiral selector of cellulose-2,3-bis(3,5-dimethylphenylcarbamate) (CBDMPC) was synthesized by reacting 3,5-dimethylphenyl isocyanate with microcrystalline cellulose dissolved in an ionic liquid of 1-allyl-3-methyl-imidazolium chloride (AMIMCl). The obtained chiral selector was effectively characterized by infrared spectroscopy, elemental analysis and ¹H NMR. The selector was reacted with 3-aminopropylsilanized silica gel and the CBDMPC bonded chiral stationary phase (CSP) was obtained. Chromatographic evaluation of the prepared CSPs was conducted by high performance liquid chromatographic (HPLC) and baseline separation of three typical fungicides including hexaconazole, metalaxyl and myclobutanil was achieved using n-hexane/isopropanol as the mobile phase with a flow rate 1.0 mL/min. Experimental results also showed that AMIMCl could be recycled easily and reused in the preparation of CSPs as an effective reaction media.     

毛细管电泳法分离6种手性化合物

以羟丙基-β-环糊精作为手性选择剂,采用毛细管电泳法对氧氟沙星、特布他林、克伦特罗、美托洛尔、扁桃酸和苯基丁二酸等6种对映体进行手性分离条件研究。通过对羟丙基-β-环糊精的浓度、缓冲溶液pH值、电压和检测波长等影响手性分离主要因素的探讨,建立了能同时实现对6种对映体手性分离的方法;并采用对照品加入法将手性单体加入到对映体化合物中,确定了氧氟沙星对映体的出峰顺序。     

去甲万古霉素键合手性固定相的制备及应用

以去甲万古霉素为手性选择剂,采用4,4-二苯基甲烷异氰酸酯作为间隔臂,将其键合到氨化的单分散交联聚甲基丙烯酸环氧丙酯微球上,合成了去甲万古霉素手性固定相。该键合固定相在极性有机相模式下,成功地实现了五种手性药物对映体的分离,详细考察了流动相组成、酸碱添加剂用量、温度和流速等对药物对映异构的拆分影响,并初步探讨了其手性识别机理。     

Separation of asymmetric triacylglycerols into their enantiomers by recycle high‐performance liquid chromatography

A recycle HPLC system equipped with a polysaccharide‐based chiral column was used for the enantiomeric separation of asymmetric triacylglycerols (TAGs). When the chiral columns were screened by the resolution of 1,2‐dipalmitoyl‐3‐oleoyl‐rac‐glycerol separation was achieved only with the cellulose tris‐ (3,5‐dimethylphenylcarbamate) chiral selector. The resolution of other TAG enantiomers was also examined, and 1,2‐dioleoyl‐3‐palmitoyl‐rac‐glycerol, 1,2‐dipalmitoyl‐3‐linoleoyl‐rac‐glycerol, 1,2‐dipalmitoyl‐3‐eicosapentaenoyl‐rac‐glycerol, 1,2‐dipalmitoyl‐3‐docosahexaenoyl‐rac‐glycerol, and 1,2‐docosahexaenoyl‐3‐palmitoyl‐rac‐glycerol were resolved into their respective enantiomers. However, neither 1,2‐dioleoyl‐3‐linoleoyl‐rac‐glycerol, consisting of only unsaturated fatty acids, nor 1,2‐dipalmitoyl‐3‐stearoyl‐rac‐glycerol, consisting of only saturated fatty acids, was resolved. In addition, 1,2‐eicosapentaenoyl‐3‐palmitoyl‐rac‐glycerol was not resolved clearly, even in the recycle runs. These results suggest that asymmetric TAGs having both a palmitic acid moiety and an unsaturated fatty acid moiety at the sn‐1 or sn‐3 positions might be resolved on a cellulose tris‐ (3,5‐dimethylphenylcarbamate) chiral column.     

Rückgewinnung und Enantiomerentrennung chiraler Anästhetika mittels modifizierter poröser Gläser

Porous glass can be widely applied due to favorable chemical and physical properties and the possibility to modify the surface. This work describes the synthesis and optimization of porous glass beads for recovering chiral anesthetics and the separation of the enantiomers. Besides a characterization by nitrogen adsorption and mercury intrusion, the retention behavior of desflurane is investigated in chromatographic experiments with the native support and after immobilization of a chiral selector.     

苯氧羧酸类除草剂的手性毛细管电泳

以7-CD为毛细管电泳手性选择剂,对苯氧羧酸类除草剂对映体的分离进行了研究。考察了手性选择剂的种类、7-CD浓度、SDS浓度、背景电解质浓度、pH值等对分离的影响。结果发现,选择30mmol·L11rCD＋100mmol·L11SDS＋75mmol·L-1H3P04作为电泳缓冲体系（pH值2．O）,2,4-滴丙酸、2,4,5-滴丙酸、2-（3-氯苯氧基）丙酸对映体完全分离,2-（4-氯苯氧基）丙酸、2-苯氧基丙酸对映体部分分离,分离度分别为3．42、8．27、2．83、0．89、0．50。     

Molecular Recognition of the HPLC Whelk-O1 Selector towards the Conformational Enantiomers of Nevirapine and Oxcarbazepine

The presence of stereogenic elements is a common feature in pharmaceutical compounds, and affording optically pure stereoisomers is a frequent issue in drug design. In this context, the study of the chiral molecular recognition mechanism fundamentally supports the understanding and optimization of chromatographic separations with chiral stationary phases. We investigated, with molecular docking, the interactions between the chiral HPLC selector Whelk-O1 and the stereoisomers of two bioactive compounds, the antiviral Nevirapine and the anticonvulsant Oxcarbazepine, both characterized by two stereolabile conformational enantiomers. The presence of fast-exchange enantiomers and the rate of the interconversion process were studied using low temperature enantioselective HPLC and VT-NMR with Whelk-O1 applied as chiral solvating agent. The values of the energetic barriers of interconversion indicate, for the single enantiomers of both compounds, half-lives sufficiently long enough to allow their separation only at critically sub-ambient temperatures. The chiral selector Whelk-O1 performed as a strongly selective discriminating agent both when applied as a chiral stationary phase (CSP) in HPLC and as CSA in NMR spectroscopy.     

Enantioselective Extraction of Racemic Mandelic Acid by Di(2‐ethylhexyl) Phosphoric Acid and Tartaric Acid Derivatives as Mixed Complex Chiral Selectors

The distribution behavior of mandelic acid (MA) enantiomers was examined in a two‐phase system containing di(2‐ethylhexyl) phosphoric acid (D2EHPA) with two tartaric acid derivatives as complex chiral selectors in n‐octanol. Factors affecting the extraction were investigated, including the structure and concentration of tartaric acid as well as the concentration of D2EHPA and D,L‐MA. The results showed that both the distribution ratio and enantioselectivity were greatly improved by using a complex chiral selector rather than using the tartaric acid derivative by itself. Finally, it was found that the formation of mixed complex chiral selectors by mixing two tartaric acid derivatives with D2EHPA can improve the capacity of enantioselective extraction.     

亲和膜手性拆分技术及手性拆分固膜

阐述了亲和膜拆分技术,包括亲和超滤、纳滤、电渗析、渗析及渗透汽化等在手性拆分领域的应用,对基于对映体间亲和性差异的手性选择膜及基于"形状记忆"的分子印迹拆分膜的最新进展进行了综述,并就今后的发展方向提出建议。