1
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Sun G, Choi DM, Xu H, Baeck SH, Row KH, Tang W. Lipase-based MIL-100(Fe) biocomposites as chiral stationary phase for high-efficiency capillary electrochromatographic enantioseparation. Mikrochim Acta 2023; 190:84. [PMID: 36749401 DOI: 10.1007/s00604-023-05647-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Accepted: 01/04/2023] [Indexed: 02/08/2023]
Abstract
A novel chiral porous column was fabricated by lipase immobilized MIL-100(Fe) biocomposites as chiral stationary phase through covalent coupling and applied to capillary electrochromatographic enantioseparation. MOF-based lipase biocomposites not only enhance stereoselective activities but also improve the stability and applicability of the enzyme. The functionalized porous columns were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, and powder X-ray diffraction. The performance of the porous column was evaluated by enantioseparating amino acid enantiomers, affording high resolution over 2.0. Besides, the enantio-resolutions of phenylephrine, phenylsuccinic acid, chloroquine, and zopiclone were also greater than 2.0. The relative standard deviations of run-to-run, intra-, and inter-day repeatability were within 4.0% in terms of resolution and retention time, exhibiting excellent stability of the column. Conceivably, the results show that MOF-based lipase composites as chiral stationary phase offer a highly efficient means for enantioseparation in capillary electrochromatography, attributing to the enhanced enantioselective activities of lipase by highly ordered frameworks.
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Affiliation(s)
- Genlin Sun
- Department of Pharmacy, Jiangxi University of Chinese Medicine, Nanchang, 330004, People's Republic of China
| | - Dong Min Choi
- Department of Chemistry and Chemical Engineering, Education and Research Center for Smart Energy and Materials, Inha University, Incheon, 402-701, South Korea
| | - Helong Xu
- Department of Pharmacy, Jiangxi University of Chinese Medicine, Nanchang, 330004, People's Republic of China
| | - Sung Hyeon Baeck
- Department of Chemistry and Chemical Engineering, Education and Research Center for Smart Energy and Materials, Inha University, Incheon, 402-701, South Korea.
| | - Kyung Ho Row
- Department of Chemistry and Chemical Engineering, Education and Research Center for Smart Energy and Materials, Inha University, Incheon, 402-701, South Korea.
| | - Weiyang Tang
- School of Pharmacy, Hangzhou Normal University, Hangzhou, 311121, People's Republic of China. .,Department of Chemistry and Chemical Engineering, Education and Research Center for Smart Energy and Materials, Inha University, Incheon, 402-701, South Korea. .,Key Laboratory of Elemene Class Anti-Cancer Chinese Medicines; Engineering Laboratory of Development and Application of Traditional Chinese Medicines; Collaborative Innovation Center of Traditional Chinese Medicines of Zhejiang Province, Hangzhou Normal University, Hangzhou, Zhejiang, 311121, China.
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2
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Novel bovine serum album and β-cyclodextrin-based mixed chiral stationary phase for the enantioseparation in capillary electrochromatography. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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3
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Recent Advances on Chiral Mobile Phase Additives: A Critical Review. JOURNAL OF ANALYSIS AND TESTING 2022. [DOI: 10.1007/s41664-022-00222-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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4
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Sun G, Tang W, Lu Y, Row KH. Enantioseparation by simultaneous biphasic recognition using mobile phase additive and chiral stationary phase in capillary electrochromatography. J Chromatogr A 2022; 1666:462856. [DOI: 10.1016/j.chroma.2022.462856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 01/21/2022] [Accepted: 01/25/2022] [Indexed: 10/19/2022]
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5
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Zhou L, Lu Y, Sun G. Open tubular capillary column immobilized with sulfobutylether-β-cyclodextrin for chiral separation in capillary electrochromatography. J Sep Sci 2021; 44:2037-2045. [PMID: 33683009 DOI: 10.1002/jssc.202100037] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 03/01/2021] [Accepted: 03/03/2021] [Indexed: 12/11/2022]
Abstract
A novel chiral open tubular capillary column was fabricated with sulfobutylether-β-cyclodextrin and glycidyl methacrylate for enantioseparation in capillary electrochromatography. First, the pretreated silica-fused capillary was treated with 3-trimethoxysilyl propyl methacrylate to attach double bond ligand onto the surface. A copolymer layer was formed on the surface of capillary using glycidyl methacrylate and ethylene dimethacrylate by in situ one-pot polymerization. Sulfobutylether-β-cyclodextrin was encapsulated inside the copolymerized layer. The morphology of the developed column was characterized by field emission scanning electron microscopy. The effect of organic percentage and pH value of the mobile phase on electroosmotic flow and resolution was also investigated. The performance of the fabricated column was validated by separation of amlodipine besilate, 2,3-diphenylpropionic acid, tropic acid, and pantoprazole enantiomers with good resolutions of 3.67, 4.82, 3.34, and 2.61, respectively. The repeatabilities of column-to-column and day-to-day through relative standard deviation were found better than 4%, exhibiting satisfactory repeatability of the developed column. The results reveal that open tubular capillary columns modified with β-cyclodextrin show a great prospect for enantioseparation of chiral drugs in capillary electrochromatography.
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Affiliation(s)
- Lifen Zhou
- Department of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, P. R. China
| | - Yao Lu
- Department of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, P. R. China
| | - Genlin Sun
- Department of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, P. R. China
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6
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Enantiomeric resolution of quinolones on crown ether CSP: Thermodynamics, chiral discrimination mechanism and application in biological samples. J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1166:122550. [PMID: 33545563 DOI: 10.1016/j.jchromb.2021.122550] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Revised: 01/03/2021] [Accepted: 01/10/2021] [Indexed: 11/21/2022]
Abstract
The enantiomers of quinolone racemates were resolved using chiral crown ether within 8 min. Thermodynamics data and modeling results were used to determine chiral recognition mechanism. The column used was (+)-Crownpack column (250 mm × 4.6 mm, 5 µm) with three mobile phases I: ACN:Water (80:20) + 10 mM H2SO4 and 10 mM CH3COONH4, II: ACN:Water (80:20) + 20 mM perchloric acid and III: EtOH:Water (80:20) + 20 mM perchloric acid. The flow rate of the mobile phases was 1.0 mL/min with UV detection at different wavelengths. The ranges of retention (k), separation (α), and resolution (Rs) factors were 1.00-5.40, 1.37-2.00 and 1.50-3.30. The tailing factor was 1.o for all peaks with 900-2325 as the number of theoretical plates were 8.0-10.0 and 32.4-22.1 µg. The difference in enthalpy, entropy and free energy varied in the range of -0.350 to -0.024, 18.74 × 10-4 to 3.94 × 10-4 and -0.918 to -0.143, respectively. The thermodynamic and docking results showed chiral discrimination due to physical forces of amnio group cations penetration into the chiral cavity of the chiral selector following hydrogen bindings. The binding energy of S-enantiomers was higher than R-enantiomers; confirming stronger binding of S-enantiomers with CSP than R-enantiomers. The described chiral-HPLC method was used for the analysis of the quinolone enantiomers in urine samples and the results were quite satisfactory. Therefore, the reported method may be used for the enantiomeric separation of quinolone enantiomers in urine samples.
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7
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Lu Y, Sun G. Hydroxypropyl-β-cyclodextrin encapsulated stationary phase based on silica monolith particles for enantioseparation in liquid chromatography. J Sep Sci 2020; 44:735-743. [PMID: 33253443 DOI: 10.1002/jssc.202000978] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 11/21/2020] [Accepted: 11/26/2020] [Indexed: 01/13/2023]
Abstract
Hydroxypropyl-β-cyclodextrin-encapsulated stationary phase incorporated on silica monolith particles was prepared by physical embedding, providing a new method for the development of chiral stationary phase for enantioseparation in liquid chromatography. Ground silica monolith particles of about 2.0 μm were prepared via sol-gel reaction followed by differential sedimentation. Initially, the silica monolith particles were pretreated with 3-trimethoxysilyl propyl methacrylate to attach double-bonded ligands onto the surface, then a network structure was formed onto the surface of the particle using N-isopropyl acrylamide as functional monomer. Hydroxypropyl-β-cyclodextrin was encapsulated inside N-isopropyl acrylamide copolymerized layer on the surface of silica monolith particles. The effect of the amount of chiral selector on the chromatographic efficiency of the chiral stationary phase was examined. The glass lined stainless steel columns (1 mm internal diameter, 300 mm length) were packed with the stationary phase for estimation of the efficiency by separation of phenylsuccinic acid, oxybutynin, equol, and naproxen enantiomers in high-performance liquid chromatography, with the resolutions of 1.54, 1.72, 2.54, and 2.31, respectively. The column to column repeatabilities through relative standard deviation were found better than 3%. The experimental results indicate that the sol-gel ground silica particles modified with β-cyclodextrin provide a promising way for the separation of chiral enantiomers.
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Affiliation(s)
- Yao Lu
- Department of pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, P. R. China
| | - Genlin Sun
- Department of pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, P. R. China
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8
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ALOthman ZA, ALanazi AG, Suhail M, Ali I. HPLC enantio-separation and chiral recognition mechanism of quinolones on vancomycin CSP. J Chromatogr B Analyt Technol Biomed Life Sci 2020; 1157:122335. [DOI: 10.1016/j.jchromb.2020.122335] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/08/2020] [Accepted: 08/16/2020] [Indexed: 02/07/2023]
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9
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Duan WD, Huang XY, Di DL. Chiral counter-current chromatography: A survey of its instrument, mechanism, procedure, and applications. Chirality 2020; 32:1264-1283. [PMID: 32692440 DOI: 10.1002/chir.23262] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Revised: 06/06/2020] [Accepted: 06/16/2020] [Indexed: 11/09/2022]
Abstract
The chiral separation by counter-current chromatography has made great progress in the past three decades. It has become increasingly popular in the field of chiral separation, and many applications have been introduced during the last years. This review mainly focuses on the current topics, applications, and trends in chiral separation by counter-current chromatography. It contains the development of modern counter-current chromatography apparatus, theory of counter-current chromatography, overview of applications of chiral counter-current chromatography enantioseparation, its current situation, and challenges. At last, some conclusions and perspectives also have been discussed in this review.
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Affiliation(s)
- Wen-Da Duan
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Xin-Yi Huang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Duo-Long Di
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, China
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10
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Rebizi MN, Sekkoum K, Belboukhari N, Cheriti A, Aboul-Enein HY. Liquid Chromatographic Enantioseparation of Some Fluoroquinoline Drugs Using Several Polysaccharide-Based Chiral Stationary Phases. J Chromatogr Sci 2018; 56:835-845. [PMID: 29931194 DOI: 10.1093/chromsci/bmy061] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 05/31/2018] [Indexed: 11/14/2022]
Abstract
The enantioseparation of three fluoroquinoline antibacterial drugs, namely, flumequine, ofloxacin and lomefloxacin using high-performance liquid chromatography was optimized on seven polysaccharide-derived chiral stationary phases, namely, Chiralpak® IB, chiralpak® IA, Chiralpak® AD, Chiralcel® OJ, Chiralcel® OD, Chiralcel® OD-H and Chiralcel® OZ-3 and applying different mobile phases in isocratic mode is described. The role of addition of organic additives was also investigated. A baseline separation of flumequine, ofloxacin and lomefloxacin enantiomers was achieved. Parameters influencing enantioseparation including mobile phase, organic additive and chemical nature of the chiral selector found to be highly influencing on the enantiomeric separation were investigated. Chiral recognition mechanism(s) are also presented.
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Affiliation(s)
- Mohamed Nadjib Rebizi
- Bioactive Molecules & Chiral separation Laboratory, University of Bechar, Bechar, Algeria
| | - Khaled Sekkoum
- Bioactive Molecules & Chiral separation Laboratory, University of Bechar, Bechar, Algeria
| | - Nasser Belboukhari
- Bioactive Molecules & Chiral separation Laboratory, University of Bechar, Bechar, Algeria
| | - Abdelkrim Cheriti
- Phytochemistry & Organic Synthesis Laboratory, University of Bechar, Bechar, Algeria
| | - Hassan Y Aboul-Enein
- Pharmaceutical and Medicinal Chemistry Department, Pharmaceutical and Drug Industries Research Division, National Research Center, Dokki, Giza, Egypt
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11
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Thermodynamic parameters and isotherm application on enantiomeric separation of levofloxacin using hollow fiber supported liquid membrane system. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2017.12.034] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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12
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Huang XY, Pei D, Liu JF, Di DL. A review on chiral separation by counter-current chromatography: Development, applications and future outlook. J Chromatogr A 2018; 1531:1-12. [DOI: 10.1016/j.chroma.2017.10.073] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Revised: 10/27/2017] [Accepted: 10/29/2017] [Indexed: 12/21/2022]
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13
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Ali I, Suhail M, Asnin L. Chiral separation of quinolones by liquid chromatography and capillary electrophoresis. J Sep Sci 2017; 40:2863-2882. [PMID: 28510993 DOI: 10.1002/jssc.201700200] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 05/02/2017] [Accepted: 05/02/2017] [Indexed: 12/29/2022]
Abstract
The quinolones are derivatives of oxoquinolines and mostly known for their antibacterial and antiviral activities. Many quinolones are chiral compounds having asymmetric centers and important due to their enantioselective biological activities. In order to study the biological activities of quinolone enantiomers, to control the manufacturing of homochiral drugs and to prepare necessary quantities of pure enantiomers for preclinical or clinical trials, respective chiral separation methods are urgently needed. In this context, the present review discusses chromatographic and electrophoretic methods for the enantioseparation of chiral quinolones and provides some useful information on their physical and pharmaceutical properties. The drawbacks of currently used techniques are revealed and ways to overcome them are outlined. Moreover, recommendations for an optimal choice of a separation protocol are given.
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Affiliation(s)
- Imran Ali
- Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi, India
| | - Mohd Suhail
- Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi, India
| | - Leonid Asnin
- Perm National Research Polytechnic University, Perm, Russia
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14
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Zhang P, Xie N, Tang K, Chen X, Xu W. Modeling and optimization of two phase system for recycling high-speed counter-current chromatographic separation of ketoconazole enantiomers. Sep Purif Technol 2016. [DOI: 10.1016/j.seppur.2016.03.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Yu Y, Liu W, Ma J, Tao Y, Qin Y, Kong Y. An efficient chiral sensing platform based on graphene quantum dot–tartaric acid hybrids. RSC Adv 2016. [DOI: 10.1039/c6ra18477d] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Hybrids of GQDs-l-(+)–TA and GQDs-d-(−)–TA are used for the construction of a pH-sensitive chiral sensing platform.
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Affiliation(s)
- Yin Yu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- School of Petrochemical Engineering
- Changzhou University
- Changzhou 213164
- China
| | - Wenjie Liu
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- School of Petrochemical Engineering
- Changzhou University
- Changzhou 213164
- China
| | - Jianfeng Ma
- School of Environmental & Safety Engineering
- Changzhou University
- Changzhou 213164
- China
| | - Yongxin Tao
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- School of Petrochemical Engineering
- Changzhou University
- Changzhou 213164
- China
| | - Yong Qin
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- School of Petrochemical Engineering
- Changzhou University
- Changzhou 213164
- China
| | - Yong Kong
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology
- School of Petrochemical Engineering
- Changzhou University
- Changzhou 213164
- China
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17
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Tong S, Zhang H, Shen M, Ito Y, Yan J. Application and comparison of high-speed countercurrent chromatography and high performance liquid chromatography in preparative enantioseparation of α-substitution mandelic acids. SEP SCI TECHNOL 2014; 50:735-743. [PMID: 25983356 DOI: 10.1080/01496395.2014.959602] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Preparative enantioseparations of α-cyclopentylmandelic acid and α-methylmandelic acid by high-speed countercurrent chromatography (HSCCC) and high performance liquid chromatography (HPLC) were compared using hydroxypropy-β-cyclodextrin (HP-β-CD) and sulfobutyl ether-β-cyclodextrin (SBE-β-CD) as the chiral mobile phase additives. In preparative HPLC the enantioseparation was achieved on the ODS C18 reverse phase column with the mobile phase composed of a mixture of acetonitrile and 0.10 mol L-1 phosphate buffer at pH 2.68 containing 20 mmol L-1 HP-β-CD for α-cyclopentylmandelic acid and 20 mmol L-1 SBE-β-CD for α-methylmandelic acid. The maximum sample size for α-cyclopentylmandelic acid and α-methylmandelic acid was only about 10 mg and 5 mg, respectively. In preparative HSCCC the enantioseparations of these two racemates were performed with the two-phase solvent system composed of n-hexane-methyl tert.-butyl ether-0.1 molL-1 phosphate buffer solution at pH 2.67 containing 0.1 mol L-1 HP-β-CD for α-cyclopentylmandelic acid (8.5:1.5:10, v/v/v) and 0.1 mol L-1 SBE-β-CD for α-methylmandelic acid (3:7:10, v/v/v). Under the optimum separation conditions, total 250 mg of racemic α-cyclopentylmandelic acid could be completely enantioseparated by HSCCC with HP-β-CD as a chiral mobile phase additive in a single run, yielding 105-110 mg of enantiomers with 95-98% purity and 85-90% recovery. But, no complete enantioseparation of α-methylmandelic acid was achieved by preparative HSCCC with either of the chiral selectors due to their limited enantioselectivity. In this paper preparative enantioseparation by HSCCC and HPLC was compared from various aspects.
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Affiliation(s)
- Shengqiang Tong
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, 310032, China ; Laboratory of Bioseparation Tecnology, Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Hu Zhang
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Mangmang Shen
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Yoichiro Ito
- Laboratory of Bioseparation Tecnology, Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Jizhong Yan
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, 310032, China
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Zhang P, Sun G, Tang K, Yang W, Sui G, Zhou C. Enantiomeric separation of oxybutynin by recycling high-speed counter-current chromatography with hydroxypropyl-β-cyclodextrin as chiral selector. J Sep Sci 2014; 37:3443-50. [DOI: 10.1002/jssc.201400812] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2014] [Revised: 08/28/2014] [Accepted: 08/31/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Panliang Zhang
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang China
| | - Genlin Sun
- College of Chemistry and Chemical Engineering; Hunan University; Changsha China
| | - Kewen Tang
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang China
| | - Weijun Yang
- College of Chemistry and Chemical Engineering; Hunan University; Changsha China
| | - Guoqing Sui
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang China
| | - Congshan Zhou
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang China
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Preparative enantioseparation of β-blocker drugs by counter-current chromatography using dialkyl l-tartrate as chiral selector based on borate coordination complex. J Chromatogr A 2012; 1263:74-83. [DOI: 10.1016/j.chroma.2012.09.023] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2012] [Revised: 09/03/2012] [Accepted: 09/06/2012] [Indexed: 11/23/2022]
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20
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Fang Z, Guo Z, Qin Q, Fan J, Yin Y, Zhang W. Semi-preparative enantiomeric separation of ofloxacin by HPLC. J Chromatogr Sci 2012; 51:133-7. [PMID: 22815212 DOI: 10.1093/chromsci/bms117] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
A direct semi-preparative high performance liquid chromatography (HPLC) enantioseparation of ofloxacin was performed on chemically immobilized cyclodextrin derivative-mono (6A-azido-6A-deoxy)-per(p-chlorophenyl carbamoylated) β-CD chiral stationary phase. Conditions for semi-preparative separations were established using a 250 × 4.6 mm i.d. column and subsequently extended to a 250 × 10.0 mm i.d. column that enabled separations on a milligram scale. Optimization of the chromatographic conditions (mobile phase and column load) with respect to better efficiency, resolution and peak retention resulted in a system capable of separating up to 304 mg of (-)-(S)-ofloxacin and 56 mg of (+)-(R)-ofloxacin of the racemate over 6 h. The purities of the separated enantiomers were determined by HPLC. Moreover, both separated enantiomers were characterized by mass spectrometry; then, the absolute configuration of the products was clearly confirmed by polarimetry.
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Affiliation(s)
- Zhili Fang
- Institute of Special Materials/School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China
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21
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Tong S, Guan YX, Yan J, Zheng B, Zhao L. Enantiomeric separation of (R, S)-naproxen by recycling high speed counter-current chromatography with hydroxypropyl-β-cyclodextrin as chiral selector. J Chromatogr A 2011; 1218:5434-40. [DOI: 10.1016/j.chroma.2011.06.015] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2011] [Revised: 05/30/2011] [Accepted: 06/01/2011] [Indexed: 10/18/2022]
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