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Jin Y, Bao H, Sun W, Tong S. Enantioseparation of three constitutional isomeric 2-(methylphenyl)propanoic acids by countercurrent chromatography. J Chromatogr A 2020; 1637:461804. [PMID: 33352504 DOI: 10.1016/j.chroma.2020.461804] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2020] [Revised: 11/27/2020] [Accepted: 12/10/2020] [Indexed: 10/22/2022]
Abstract
2-(3-Methylphenyl)propanic acid and 2-(4-methylphenyl)propanoic acid were successfully enantioseparated by countercurrent chromatography using hydroxypropyl-β-cyclodextrin (HP-β-CD) as a chiral selector. 2-(2-Methylphenyl)propanoic acid was also studied to compare the enantioseparation ability of three isomeric 2-(methylphenyl)propanoic acids. Totally 20 mg of 2-(3-methylphenyl)propanic acid and 20mg of 2-(4-methylphenyl)propanic acid were enantioseparated individually by countercurrent chromatography. Recovery for the (±)-2-(3-methylphenyl)propanic acid enantiomer was in the range of 85%-90% with 98.0%-98.8% purity and recovery for the (±)-2-(4-methylphenyl)propanic acid enantiomer was in the range of 80%-83% with 97.0%-98.0% purity. The enantioseparation factor in countercurrent chromatography for 2-(4-methylphenyl)propanic acid and 2-(3-methylphenyl)propanic acid were 1.31 and 1.26, and the peak resolution in HPLC reached 2.2 and 1.4. However, no enantioseparation could be found for 2-(2-methylphenyl)propanic acid. In addition, the inclusion complexes were investigated by UV spectrophotometer. The inclusion formation constant of inclusion complex between 2-(4-methylphenyl)propanic acid, 2-(3-methylphenyl)propanic acid, 2-(2-methylphenyl)propanic acid and HP-β-CD were determined as 121.73 mol/L, 78.12 mol/L and 53.18 mol/L, respectively. The present results showed that enantiorecognition was greatly affected by substituted positions of methyl group on the benzene ring. Combined with our previous results, the steric hindrance had a significant effect on inclusion interaction between HP-β-CD and racemic 2-(substitutedphenyl)propanoic acids. No enantiorecognition could be achieved for 2-(substitutedphenyl)propanoic acids with ortho-substituent group on benzene, while the influence of meta- and para- group on enantiorecognition varies with different substituent groups on benzene ring.
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Affiliation(s)
- Yang Jin
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Honglei Bao
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Wenyu Sun
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Shengqiang Tong
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, 310032, China.
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Sun W, Bao H, Qian J, Tong S. Enantioseparation of ondansetron by countercurrent chromatography using sulfobutyl ether-β-cyclodextrin as chiral selector. J Sep Sci 2020; 44:922-930. [PMID: 33284511 DOI: 10.1002/jssc.202001118] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 11/28/2020] [Accepted: 12/02/2020] [Indexed: 11/08/2022]
Abstract
Ondansetron, a highly selective 5-hydroxytryptamine 3 receptor antagonist, was successfully enantioseparated by recycling countercurrent chromatography using sulfobutyl ether-β-cyclodextrin as chiral selector. Important factors for the enantioseparation were optimized, including different organic solvent, type of substituted β-cyclodextrin, pH of aqueous phase, concentration of chiral selector, and separation temperature. A biphasic solvent system composed of n-hexane: n-butyl acetate: 0.1 mol/L phosphate buffer solution pH 9.2 with 50 mmol/L of sulfobutyl ether-β-cyclodextrin (2.5:7.5:10, v/v/v) was selected. Under optimized separation conditions, 5 mg of ondansetron was enantioseparated using recycling countercurrent chromatography, yielding 1.2 and 1.5 mg of ondansetron enantiomers with 97.5 and 95.8% purity and the recovery reached 48-60%.
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Affiliation(s)
- Wenyu Sun
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, P. R. China
| | - Honglei Bao
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, P. R. China
| | - Junqing Qian
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, P. R. China
| | - Shengqiang Tong
- College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, P. R. China
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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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Liu Y, Kuang P, Guo S, Sun Q, Xue T, Li H. An overview of recent progress in solvent systems, additives and modifiers of counter current chromatography. NEW J CHEM 2018. [DOI: 10.1039/c7nj04747a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Solvent systems are critical to counter current chromatography (CCC). Appropriate additives and modifiers can be used to improve the separation efficiency of CCC.
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Affiliation(s)
- Yanjuan Liu
- School of Pharmacy
- Linyi University
- Shuangling Road
- Linyi 276000
- P. R. China
| | - Pengqun Kuang
- School of Pharmacy
- Linyi University
- Shuangling Road
- Linyi 276000
- P. R. China
| | - Shaofen Guo
- School of Pharmacy
- Linyi University
- Shuangling Road
- Linyi 276000
- P. R. China
| | - Qing Sun
- School of Pharmacy
- Linyi University
- Shuangling Road
- Linyi 276000
- P. R. China
| | - Tao Xue
- School of Pharmacy
- Linyi University
- Shuangling Road
- Linyi 276000
- P. R. China
| | - Haigang Li
- School of Pharmacy
- Linyi University
- Shuangling Road
- Linyi 276000
- P. R. China
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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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Xu W, Wang S, Xie X, Zhang P, Tang K. Enantioseparation of pheniramine enantiomers by high-speed countercurrent chromatography using β-cyclodextrin derivatives as a chiral selector. J Sep Sci 2017; 40:3801-3807. [DOI: 10.1002/jssc.201700345] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Revised: 07/18/2017] [Accepted: 07/23/2017] [Indexed: 11/05/2022]
Affiliation(s)
- Weifeng Xu
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang China
| | - Shichuan Wang
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang China
| | - Xiaojuan Xie
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang China
| | - Panliang Zhang
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang China
| | - Kewen Tang
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang China
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Zhang P, Xie X, Tang K, Xu W, Xiong B, Liu Y. Optimizing two-phase system by experiment and simulation for high-speed counter-current chromatographic separation of 2-phenylbutyric acid enantiomer. SEP SCI TECHNOL 2017. [DOI: 10.1080/01496395.2017.1283329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Panliang Zhang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, China
| | - Xiaojuan Xie
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, China
| | - Kewen Tang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, China
| | - Weifeng Xu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, China
| | - Biquan Xiong
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, China
| | - Yu Liu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, China
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Zhang P, Xie X, Tang K, Xu W. Chiral separation of brompheniramine enantiomers by recycling high-speed countercurrent chromatography using carboxymethyl-β-cyclodextrin as a chiral selector. J Sep Sci 2016; 39:2300-6. [DOI: 10.1002/jssc.201501240] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 03/28/2016] [Accepted: 04/02/2016] [Indexed: 01/11/2023]
Affiliation(s)
- Panliang Zhang
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang P.R. China
| | - Xiaojuan Xie
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang P.R. China
| | - Kewen Tang
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang P.R. China
| | - Weifeng Xu
- Department of Chemistry and Chemical Engineering; Hunan Institute of Science and Technology; Yueyang P.R. China
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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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Zhang P, Sun G, Qiu Y, Tang K, Zhou C, Yang C. Equilibrium study on enantioselective distribution of amlodipine besilate enantiomers in a biphasic recognition chiral extraction system. J INCL PHENOM MACRO 2016. [DOI: 10.1007/s10847-016-0612-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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11
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Tong S, Zhang H, Cheng D. Preparative Enantioseparation of β-Substituted-2-Phenylpropionic Acids by Countercurrent Chromatography With Substituted β-Cyclodextrin as Chiral Selectors. Chirality 2015; 27:795-801. [DOI: 10.1002/chir.22497] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2015] [Revised: 06/19/2015] [Accepted: 07/20/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Shengqiang Tong
- College of Pharmaceutical Science; Zhejiang University of Technology; Hangzhou China
| | - Hu Zhang
- College of Pharmaceutical Science; Zhejiang University of Technology; Hangzhou China
| | - Dongping Cheng
- College of Pharmaceutical Science; Zhejiang University of Technology; Hangzhou China
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12
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Tang K, Sun G, Zhang P, Yang W, Zhou C, Yang C. Modelling and optimization of a two phase system for the separation of equol enantiomers by recycling high-speed counter-current chromatography. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.tetasy.2015.06.018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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13
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Zhang P, Sun G, Tang K, Zhou C, Yang C, Yang W. Separation of amlodipine besilate enantiomers by biphasic recognition recycling high-speed counter-current chromatography. Sep Purif Technol 2015. [DOI: 10.1016/j.seppur.2015.03.053] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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15
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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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Sun G, Tang K, Zhang P, Yang W, Sui G. Separation of phenylsuccinic acid enantiomers using biphasic chiral recognition high-speed countercurrent chromatography. J Sep Sci 2014; 37:1736-41. [DOI: 10.1002/jssc.201400281] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2014] [Revised: 04/15/2014] [Accepted: 04/16/2014] [Indexed: 11/09/2022]
Affiliation(s)
- 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
| | - Panliang Zhang
- 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
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17
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Ma Y, Ito Y. Chiral High-Speed Counter-Current Chromatography: Future Strategies for Chiral Selector Development. ACTA ACUST UNITED AC 2014; 1:69-80. [PMID: 24611132 DOI: 10.2174/22132406113099990001] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In conventional high-performance liquid chromatography, chiral separations are performed by chiral column with a chiral selector (CS) chemically boned to the solid support. In contrast, high-speed counter-current chromatography (HSCCC) performs chiral separations by dissolving CS in the liquid stationary phase. During the past two decades, several CSs were developed to successfully carry out chiral HSCCC which include N-dodecanoyl-L-proline-3,5-dimethylanilide, β-cyclodextrin derivatives, vancomycin, cinchona alkaloid derivatives, cellulose and amylose derivatives, tartaric acid derivatives, etc. Compared to HPLC which uses over hundred different kinds of CSs, the number of CSs effectively used in HSCCC is limited to several compounds. This may be due to the violent molecular movement of CS dissolved in the liquid stationary phase which reduces chiral selectivity based on steric affinity. Future development strategy of CS for HSCC proposed here is to suppress the molecular movement of the CS in the liquid stationary phase by the following three ways: 1) using viscous stationary phase such as aqueous-aqueous polymer phase system; 2) attaching a long hydrophobic chain to the asymmetric carbon, or 3) chemically bonding CS onto hydrophobic small particles such as carbon nanotubes, gold colloidal particles, and submicron silica particles.
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Affiliation(s)
- Ying Ma
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering, (NIBIB), National Institutes of Health (NIH), 10 Center Drive, Room1C401, Bethesda, MD 20892-2281, USA
| | - Yoichiro Ito
- Laboratory of Bioseparation Technology, Biochemistry and Biophysics Center, National Heart, Lung, and Blood Institutes, National Institutes of Health,10 Center Drive, Bldg.10, Room 8N230, Bethesda, MD, 20892, USA
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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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Yan G, Ji L, Luo Y, Hu Y. Preparative isolation and purification of three sesquiterpenoid lactones from Eupatorium lindleyanum DC. by high-speed counter-current chromatography. Molecules 2012; 17:9002-9. [PMID: 22842644 PMCID: PMC6268613 DOI: 10.3390/molecules17089002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Revised: 07/18/2012] [Accepted: 07/21/2012] [Indexed: 11/16/2022] Open
Abstract
A high-speed counter-current chromatography (HSCCC) method was established for the preparative separation of three sesquiterpenoid lactones from Eupatorium lindleyanum DC. The two-phase solvent system composed of n-hexane–ethyl acetate–methanol–water (1:4:2:3, v/v/v/v) was selected. From 540 mg of the n-butanol fraction of Eupatorium lindleyanum DC., 10.8 mg of 3β-hydroxy-8β-[4'-hydroxy-tigloyloxy]-costunolide, 17.9 mg of eupalinolide A and 19.3 mg of eupalinolide B were obtained in a one-step HSCCC separation, with purities of 91.8%, 97.9% and 97.1%, respectively, as determined by HPLC. Their structures were further identified by ESI-MS and 1H-NMR.
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Affiliation(s)
- Guilong Yan
- College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210009, China
- Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, Huaiyin Normal University, Huaian 223300, China
- Jiangsu Key Laboratory for Biomass-based Energy and Enzyme Technology, Huaiyin Normal University, Huaian 223300, China
| | - Lilian Ji
- Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, Huaiyin Normal University, Huaian 223300, China
- Jiangsu Key Laboratory for Biomass-based Energy and Enzyme Technology, Huaiyin Normal University, Huaian 223300, China
| | - Yuming Luo
- Jiangsu Key Laboratory for Eco-Agricultural Biotechnology around Hongze Lake, Huaiyin Normal University, Huaian 223300, China
| | - Yonghong Hu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing University of Technology, Nanjing 210009, China
- Author to whom correspondence should be addressed; ; Tel.: +86-25-8358-7108
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Affiliation(s)
- Timothy J. Ward
- Millsaps College, 1701 N. State Street, Box 150306, Jackson, Mississippi 39210, United States
| | - Karen D. Ward
- Millsaps College, 1701 N. State Street, Box 150306, Jackson, Mississippi 39210, United States
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Enantioseparation of phenylsuccinic acid by high speed counter-current chromatography using hydroxypropyl-β-cyclodextrin as chiral selector. J Chromatogr A 2011; 1218:5602-8. [DOI: 10.1016/j.chroma.2011.06.023] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2011] [Revised: 05/03/2011] [Accepted: 06/03/2011] [Indexed: 11/18/2022]
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22
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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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