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Microsampling and enantioselective liquid chromatography coupled to mass spectrometry for chiral bioanalysis of novel psychoactive substances. Talanta 2023; 257:124332. [PMID: 36773512 DOI: 10.1016/j.talanta.2023.124332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/25/2023] [Accepted: 02/06/2023] [Indexed: 02/12/2023]
Abstract
In this paper, the development of efficient enantioselective HPLC methods for the analysis of five benzofuran-substituted phenethylamines, two substituted tryptamines, and three substituted cathinones is described. For the first time, reversed-phase (eluents made up with acidic water-methanol solutions) and polar-ionic (eluent made up with an acetonitrile-methanol solution incorporating both an acidic and a basic additive) conditions fully compatible with mass spectrometry (MS) detectors were applied with a chiral stationary phase (CSP) incorporating the (+)-(18-crown-6)-tetracarboxylic acid chiral selector. Enantioresolution was achieved for nine compounds with α and RS factors up to 1.32 and 5.12, respectively. Circular dichroism (CD) detection, CD spectroscopy in stopped-flow mode and quantum mechanical (QM) calculations were successfully employed to investigate the absolute stereochemistry of mephedrone, methylone and butylone and allowed to establish a (R)<(S) enantiomeric elution order for these compounds on the chosen CSP. Whole blood miniaturized samples collected by means of volumetric absorptive microsampling (VAMS) technology and fortified with the target analytes were extracted following an optimized protocol and effectively analysed by means of an ultra-high performance liquid chromatography-MS system. By this way a proof-of-concept procedure was applied, demonstrating the suitability of the method for quali-quantitative enantioselective assessment of the selected psychoactive substances in advanced biological microsamples. VAMS microsamplers including a polypropylene handle topped with a small tip of a polymeric porous material were used and allowed to volumetrically collect small aliquots of whole blood (10 μL) independently from its density. Highly appreciable volumetric accuracy (bias, in the -8.7-8.1% range) and precision (% CV, in the 2.8-5.9% range) turned out.
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2
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Yamagishi A, Yamamoto S, Takimoto K, Tamura K, Kamon M, Sato F, Sato H. Clay Column Chromatography for Optical Resolution: A Series of Derivatized Amino Acids. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2022. [DOI: 10.1246/bcsj.20220077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Akihiko Yamagishi
- Faculty of Medicine, Toho University, Tokyo 143-8540, Japan
- National Institute of Materials Science, Tsukuba 305-0044, Japan
| | - Shohei Yamamoto
- Department of Chemistry, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan
| | - Kazuyoshi Takimoto
- Department of Chemistry, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan
| | - Kenji Tamura
- National Institute of Materials Science, Tsukuba 305-0044, Japan
| | - Masumi Kamon
- National Institute of Materials Science, Tsukuba 305-0044, Japan
| | - Fumi Sato
- Faculty of Medicine, Toho University, Tokyo 143-8540, Japan
| | - Hisako Sato
- Department of Chemistry, Graduate School of Science and Engineering, Ehime University, Matsuyama 790-8577, Japan
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3
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Heterocyclic Crown Ethers with Potential Biological and Pharmacological Properties: From Synthesis to Applications. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12031102] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Cyclic organic compounds with several ether linkages in their structure are of much concern in our daily life applications. Crown ethers (CEs) are generally heterocyclic and extremely versatile compounds exhibiting higher binding affinity. In recent years, due to their unique structure, crown ethers are widely used in drug delivery, solvent extraction, cosmetics manufacturing, material studies, catalysis, separation, and organic synthesis. Beyond their conventional place in chemistry, this review article summarizes the synthesis, biological, and potential pharmacological activities of CEs. We have emphasized the prospects of CEs as anticancer, anti-inflammatory, antibacterial, and antifungal agents and have explored their amyloid genesis inhibitory activity, electrochemical, and potential metric sensing properties. The central feature of these compounds is their ability to form selective and stable complexes with various organic and inorganic cations. Therefore, CEs can be used in gas chromatography as the stationary phase and are also valuable for cation chromatographic to determine and separate alkali and alkaline-earth cations.
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4
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Wu G. Recent advances in helical polyacetylene derivatives used as coated chiral stationary phases for enantioseparation. Polym Chem 2022. [DOI: 10.1039/d2py00366j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The development of helical polyacetylene derivatives bearing different kinds of chiral pendants and the enantioseparation based on these helical polymers as coated CSPs for HPLC will be described.
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Affiliation(s)
- Guanzhao Wu
- Department of Central Laboratory and Mitochondrial Medicine Laboratory, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, Qingdao, China
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Wahba MEK, El Sherbiny D, El Wasseef D. Estimating chiral selector potential of micelle-based mobile phases through the analysis of some enantiomeric mixtures. JOURNAL OF TAIBAH UNIVERSITY FOR SCIENCE 2021. [DOI: 10.1080/16583655.2021.1927399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- M. E. K. Wahba
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Delta University for Science and Technology, Gamasa, Egypt
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - D. El Sherbiny
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Delta University for Science and Technology, Gamasa, Egypt
- Department of Medicinal Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
| | - D. El Wasseef
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Delta University for Science and Technology, Gamasa, Egypt
- Department of Medicinal Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura, Egypt
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Hägele JS, Seibert E, Schmid MG. A Simple HPLC–UV Approach for Rapid Enantioseparation of Cathinones, Pyrovalerones and Other Novel Psychoactive Substances on a 2.5-µm Cellulose Tris-(3,5-dimethylphenyl-carbamate) Column. Chromatographia 2020. [DOI: 10.1007/s10337-020-03860-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
AbstractThe misuse of so called novel psychoactive substances is still a challenging problem worldwide. A special attribute of a lot of these compounds is a chiral centre enabling two possible enantiomers probably related to different pharmacological and toxicological properties. The goal of the present study was to present a simple and isocratic HPLC–UV method for enantioseparation of mainly cathinone and pyrovalerone derivatives as well as selected representatives of amphetamines, ketamines, benzofuries, phenidines, phenidates, morpholines and thiophenes. A Waters Acquity UPC2® Trefoil™ CEL1 2.5 µm, 3.0 × 150 mm column served as chiral stationary phase by means of cellulose tris-(3,5-dimethylphenylcarbamate) as chiral selector. Mobile phases consisted either of n-hexane/n-butanol/diethylamine (100:0.3:0.2) or n-hexane/diethylamine (100:0.2). The method was found to be applicable for rapid simultaneous chiral separations of cathinone derivatives, to determine enantiomeric elution orders, to detect positional isomers and to identify real-life samples. Also, a repeatability study was performed successfully. 78 out of 95 compounds were separated in their enantiomers successfully, 51 of them within 6 min. It was shown that all NPS bought from online vendors or seized by police were traded as racemic mixtures.
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Hägele JS, Hubner E, Schmid MG. Chiral separation of cathinone derivatives using β-cyclodextrin-assisted capillary electrophoresis-Comparison of four different β-cyclodextrin derivatives used as chiral selectors. Electrophoresis 2019; 40:1787-1794. [PMID: 31141181 PMCID: PMC6771503 DOI: 10.1002/elps.201900085] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 05/10/2019] [Accepted: 05/18/2019] [Indexed: 12/24/2022]
Abstract
In the past decade, more than 100 different cathinone derivatives slopped over entire Europe due to their enormous popularity. Generally, these novel psychoactive substances are easily available via the internet. This fact leads to various social problems, since cathinones are substances with consciousness-changing effects and are mainly misused for recreational matters by their consumers. Cathinones possess a chiral center including two enantiomeric forms with potentially different pharmacological behavior. This fact makes analytical method development regarding their chiral separation indispensable. In this study, a chiral capillary zone electrophoresis method for the enantioseparation of 61 cathinone and pyrovalerone derivatives was developed by means of four different β-cyclodextrin derivatives. As chiral selectors, native β-cyclodextrin as well as three of its derivatives namely acetyl-β-cyclodextrin, 2-hydroxypropyl-β-cyclodextrin, and carboxymethyl-β-cyclodextrin were used. The cathinone and pyrovalerone derivatives were either purchased in internet stores or seized by police. As a result, overall 58 of 61 studied substances were partially or baseline separated by at least one of the four chiral selectors using 10 mM of β-cyclodextrin derivative in a 10 mM sodium phosphate buffer (pH 2.5). Furthermore, the method was found to be suitable for simultaneous enantioseparations, for enantiomeric purity checks and to differentiate between positional isomers. Moreover, an intra- and an interday validation was performed successfully for each chiral selector to prove the robustness of the method.
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Affiliation(s)
- Johannes S. Hägele
- Department of Pharmaceutical ChemistryInstitute of Pharmaceutical SciencesUniversity of GrazGrazAustria
| | - Eva‐Maria Hubner
- Department of Pharmaceutical ChemistryInstitute of Pharmaceutical SciencesUniversity of GrazGrazAustria
| | - Martin G. Schmid
- Department of Pharmaceutical ChemistryInstitute of Pharmaceutical SciencesUniversity of GrazGrazAustria
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Cho ES, Sung JY, Jin JS, Hyun MH. Liquid chromatographic resolution of proline and pipecolic acid derivatives on chiral stationary phases based on (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid. J Sep Sci 2018; 41:1192-1198. [PMID: 29044998 DOI: 10.1002/jssc.201700996] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2017] [Revised: 10/05/2017] [Accepted: 10/07/2017] [Indexed: 11/06/2022]
Abstract
Two liquid chromatographic chiral stationary phases based on (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid were applied to the resolution of the amide derivatives of cyclic α-amino acids including proline and pipecolic acid. Among the five amide derivatives of proline, aniline amide was resolved best on the first chiral stationary phase, which contains two N-H tethering amide groups, with the separation factor of 1.31 and the resolution of 2.60, and on the second chiral stationary phase, which contains two N-CH3 tethering amide groups, with the separation factor of 1.57 and the resolution of 5.50. Among the five amide derivatives of pipecolic acid, 2-naphthyl amide was resolved best on the first chiral stationary phase with the separation factor of 1.30 and the resolution of 1.75, but 1-naphthylmethyl amide was resolved best on the second chiral stationary phase with the separation factor of 1.30 and the resolution of 2.26. In general, the second chiral stationary phase was found to be better than the first chiral stationary phase in the resolution of the amide derivatives of cyclic α-amino acids. In this study, the second chiral stationary phase was first demonstrated to be useful for the resolution of secondary amino compounds.
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Affiliation(s)
- Eun Sol Cho
- Department of Chemistry, Pusan National University, Busan, Republic of Korea
| | - Ji Yeong Sung
- Busan Center, Korea Basic Science Institute, Busan, Republic of Korea
| | - Jong Sung Jin
- Busan Center, Korea Basic Science Institute, Busan, Republic of Korea
| | - Myung Ho Hyun
- Department of Chemistry, Pusan National University, Busan, Republic of Korea
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Adhikari S, Lee W. Chiral separation using chiral crown ethers as chiral selectors in chirotechnology. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2017. [DOI: 10.1007/s40005-017-0348-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Vargas-Caporali J, Juaristi E. Fundamental Developments of Chiral Phase Chromatography in Connection with Enantioselective Synthesis of β-Amino Acids. Isr J Chem 2017. [DOI: 10.1002/ijch.201700011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Jorge Vargas-Caporali
- Departamento de Química; Centro de Investigación y de Estudios Avanzados, Instituto Politécnico Nacional Avenida IPN No. 2508; 07360 Ciudad de México México
| | - Eusebio Juaristi
- Departamento de Química; Centro de Investigación y de Estudios Avanzados, Instituto Politécnico Nacional Avenida IPN No. 2508; 07360 Ciudad de México México
- El Colegio Nacional; Luis González Obregón No. 23, Centro Histórico 06020 Ciudad de México México
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Grecsó N, Forró E, Fülöp F, Péter A, Ilisz I, Lindner W. Combinatorial effects of the configuration of the cationic and the anionic chiral subunits of four zwitterionic chiral stationary phases leading to reversal of elution order of cyclic β-amino acid enantiomers as ampholytic model compounds. J Chromatogr A 2016; 1467:178-187. [DOI: 10.1016/j.chroma.2016.05.041] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Revised: 05/04/2016] [Accepted: 05/11/2016] [Indexed: 01/19/2023]
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12
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Preparation of Two New Diasteromeric Chiral Stationary Phases Based on (+)-(18-Crown-6)-2,3,11,12-tetracarboxylic Acid and (R)- or (S)-1-(1-Naphthyl)ethylamine and Chiral Tethering Group Effect on the Chiral Recognition. MOLECULES (BASEL, SWITZERLAND) 2016; 21:molecules21081051. [PMID: 27529205 PMCID: PMC6273757 DOI: 10.3390/molecules21081051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 08/08/2016] [Accepted: 08/09/2016] [Indexed: 11/28/2022]
Abstract
Two new diastereomeric chiral stationary phases (CSPs) based on (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid as a chiral tethering group and a Π-basic chiral unit such as (R)-1-(1-naphthyl)ethylamine (CSP 1) or (S)-1-(1-naphthyl)ethylamine (CSP 2) were prepared. The two CSPs were applied to the enantiomeric separation of N-(3,5-dinitrobenzoyl)-1-phenylalkylamines and N-(3,5-dinitrobenzoyl)-α-amino acid derivatives using 20% isopropyl alcohol in hexane as a normal mobile phase. To elucidate the effect of the two chiral units on the chiral recognition, the chiral recognition abilities of the two CSPs were compared with each other and with that of a CSP (CSP 3) based on (R)-1-(1-naphthyl)ethylamine. From the chromatographic chiral recognition results, (R)-1-(1-naphthyl)ethylamine and (+)−(18-crown-6)-2,3,11,12-tetracarboxylic acid constituting CSP 1 were concluded to show a cooperative (“matched”) effect on the chiral recognition while (S)-1-(1-naphthyl)ethylamine and (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid constituting CSP 2 were concluded to show an uncooperative (“mismatched”) effect on the chiral recognition. From these results, it was concluded that (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid can be successfully used as a chiral tethering group for the preparation of new CSPs.
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Ha JJ, Hyun MH. Enantioselective Separation of α-Amino Acids on (S)-Leucinol-based Ligand Exchange Chiral Stationary Phases. B KOREAN CHEM SOC 2016. [DOI: 10.1002/bkcs.10867] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jin Joo Ha
- Department of Chemistry and Chemistry Institute for Functional Materials; Pusan National University; Busan 46241 Republic of Korea
| | - Myung Ho Hyun
- Department of Chemistry and Chemistry Institute for Functional Materials; Pusan National University; Busan 46241 Republic of Korea
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Hyun MH. Liquid chromatographic enantioseparations on crown ether-based chiral stationary phases. J Chromatogr A 2016; 1467:19-32. [PMID: 27473514 DOI: 10.1016/j.chroma.2016.07.049] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 07/18/2016] [Accepted: 07/19/2016] [Indexed: 10/21/2022]
Abstract
Various liquid chromatographic chiral stationary phases (CSPs) have been developed for the resolution of racemic compounds. In particular, CSPs based on chiral crown ethers have been known to be useful in the resolution of racemic compounds containing a primary amino group. In this paper, the development of two types of CSPs based on the chiral crown ethers containing 1,1'-binaphthyl unit(s) or tartaric acid units as chiral barrier(s) and their applications to the resolution of various racemic compounds were reviewed. The structural characteristics of eleven CSPs and their chromatographic behaviors for the resolution of racemic primary amino and non-primary amino compounds were included.
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Affiliation(s)
- Myung Ho Hyun
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan 609-735, South Korea.
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15
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Sung JY, Choi SH, Hyun MH. Preparation of a New Chiral Stationary Phase Based on Macrocyclic Amide Chiral Selector for the Liquid Chromatographic Chiral Separations. Chirality 2016; 28:253-8. [DOI: 10.1002/chir.22569] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 11/20/2015] [Accepted: 11/20/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Ji Yeong Sung
- Department of Chemistry; Pusan National University; Busan Republic of Korea
| | - Seung Hyuck Choi
- Department of Chemistry; Pusan National University; Busan Republic of Korea
| | - Myung Ho Hyun
- Department of Chemistry; Pusan National University; Busan Republic of Korea
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16
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Hyun MH. Development of HPLC Chiral Stationary Phases Based on (+)-(18-Crown-6)-2,3,11,12-tetracarboxylic Acid and Their Applications. Chirality 2015; 27:576-88. [PMID: 26237013 DOI: 10.1002/chir.22484] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2015] [Revised: 06/08/2015] [Accepted: 06/08/2015] [Indexed: 11/05/2022]
Abstract
Crown ether-based chiral stationary phases (CSPs) have been known to be useful for the resolution of racemic primary amino compounds. In particular, CSPs based on (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid have been reported to be useful for the resolution of secondary amino compounds as well as primary amino compounds. In this article, the process of developing various CSPs based on (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid to improve the chiral recognition efficiency and/or the stability of the CSPs and their applications to the resolution of various primary and nonprimary amino compounds are reviewed.
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Affiliation(s)
- Myung Ho Hyun
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan, Republic of Korea
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Ilisz I, Grecsó N, Forró E, Fülöp F, Armstrong DW, Péter A. High-performance liquid chromatographic separation of paclitaxel intermediate phenylisoserine derivatives on macrocyclic glycopeptide and cyclofructan-based chiral stationary phases. J Pharm Biomed Anal 2015; 114:312-20. [PMID: 26099260 DOI: 10.1016/j.jpba.2015.06.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 06/03/2015] [Accepted: 06/04/2015] [Indexed: 01/05/2023]
Abstract
High-performance liquid chromatographic methods were developed for the separation of enantiomers of four unnatural paclitaxel precursor phenylisoserine analogs on chiral stationary phases containing macrocyclic glycopeptides and cyclofructans as chiral selectors. The effects of the mobile phase composition, the nature and concentration of different mobile phase additives (alcohols, amines and acids) in different chromatographic modes, temperature and the structures of the analytes on the separations were investigated. Separations were carried out at constant mobile phase compositions in the temperature range 10-50°C on macrocyclic antibiotic-based and 5-35°C on cyclofructan-based columns and the changes in enthalpy, Δ(ΔH°), entropy, Δ(ΔS°), and free energy, Δ(ΔG°), were calculated. The elution sequence was determined in most cases; no general rule could be observed.
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Affiliation(s)
- István Ilisz
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
| | - Nóra Grecsó
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary; Institute of Pharmaceutical Chemistry, University of Szeged, Eötvös utca 6, H-6720 Szeged, Hungary
| | - Enikő Forró
- Institute of Pharmaceutical Chemistry, University of Szeged, Eötvös utca 6, H-6720 Szeged, Hungary
| | - Ferenc Fülöp
- Institute of Pharmaceutical Chemistry, University of Szeged, Eötvös utca 6, H-6720 Szeged, Hungary
| | - Daniel W Armstrong
- Department of Chemistry and Biochemistry, University of Texas at Arlington, Arlington, TX 76019-0065, USA
| | - Antal Péter
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary
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High-performance liquid chromatographic separation of unusual β3-amino acid enantiomers in different chromatographic modes on Cinchona alkaloid-based zwitterionic chiral stationary phases. Amino Acids 2015; 47:2279-91. [DOI: 10.1007/s00726-015-2006-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 05/09/2015] [Indexed: 12/28/2022]
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19
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Ilisz I, Gecse Z, Lajkó G, Forró E, Fülöp F, Lindner W, Péter A. High-Performance Liquid Chromatographic Enantioseparation of Cyclic β
-Amino Acids on Zwitterionic Chiral Stationary Phases Based on Cinchona
Alkaloids. Chirality 2015; 27:563-70. [DOI: 10.1002/chir.22458] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 04/08/2015] [Accepted: 04/08/2015] [Indexed: 12/16/2022]
Affiliation(s)
- István Ilisz
- Department of Inorganic and Analytical Chemistry; University of Szeged; Szeged Hungary
| | - Zsanett Gecse
- Department of Inorganic and Analytical Chemistry; University of Szeged; Szeged Hungary
- Institute of Pharmaceutical Chemistry; University of Szeged; Szeged Hungary
| | - Gyula Lajkó
- Department of Inorganic and Analytical Chemistry; University of Szeged; Szeged Hungary
- Institute of Pharmaceutical Chemistry; University of Szeged; Szeged Hungary
| | - Enikõ Forró
- Institute of Pharmaceutical Chemistry; University of Szeged; Szeged Hungary
| | - Ferenc Fülöp
- Institute of Pharmaceutical Chemistry; University of Szeged; Szeged Hungary
| | - Wolfgang Lindner
- Department of Analytical Chemistry; University of Vienna; Vienna Austria
| | - Antal Péter
- Department of Inorganic and Analytical Chemistry; University of Szeged; Szeged Hungary
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Kumano D, Iwahana S, Iida H, Shen C, Crassous J, Yashima E. Enantioseparation on Riboflavin Derivatives Chemically Bonded to Silica Gel as Chiral Stationary Phases for HPLC. Chirality 2015; 27:507-17. [DOI: 10.1002/chir.22452] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2015] [Accepted: 03/20/2015] [Indexed: 11/08/2022]
Affiliation(s)
- Daisuke Kumano
- Department of Molecular Design and Engineering, Graduate School of Engineering; Nagoya University; Nagoya Japan
| | - Soichiro Iwahana
- Department of Molecular Design and Engineering, Graduate School of Engineering; Nagoya University; Nagoya Japan
| | - Hiroki Iida
- Department of Molecular Design and Engineering, Graduate School of Engineering; Nagoya University; Nagoya Japan
| | - Chengshuo Shen
- Department of Molecular Design and Engineering, Graduate School of Engineering; Nagoya University; Nagoya Japan
- Sciences Chimiques de Rennes, UMR 6226, Campus de Beaulieu; CNRS-Université de Rennes 1; Rennes France
| | - Jeanne Crassous
- Sciences Chimiques de Rennes, UMR 6226, Campus de Beaulieu; CNRS-Université de Rennes 1; Rennes France
| | - Eiji Yashima
- Department of Molecular Design and Engineering, Graduate School of Engineering; Nagoya University; Nagoya Japan
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Investigation of the structure–selectivity relationships and van’t Hoff analysis of chromatographic stereoisomer separations of unusual isoxazoline-fused 2-aminocyclopentanecarboxylic acids on Cinchona alkaloid-based chiral stationary phases. J Chromatogr A 2015; 1384:67-75. [DOI: 10.1016/j.chroma.2015.01.041] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 01/14/2015] [Accepted: 01/14/2015] [Indexed: 12/18/2022]
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Ahn SA, Hyun MH. Liquid chromatographic resolution of amino acid esters of acyclovir including racemic valacyclovir on crown ether-based chiral stationary phases. Chirality 2015; 27:268-73. [PMID: 25626672 DOI: 10.1002/chir.22424] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Revised: 12/07/2014] [Accepted: 12/09/2014] [Indexed: 11/11/2022]
Abstract
Valacyclovir, a potential prodrug for the treatment of patients with herpes simplex and herpes zoster, and its analogs were resolved on two chiral stationary phases (CSPs) based on (3,3'-diphenyl-1,1'-binaphthyl)-20-crown-6 covalently bonded to silica gel. In order to find out an appropriate mobile phase condition, various mobile phases consisting of various organic modifiers in water containing various acidic modifiers were applied to the resolution of valacyclovir and its analogs. When 30% acetonitrile in water containing any of 0.05 M, 0.10 M, or 0.15 M perchloric acid was used as a mobile phase, valacyclovir and its analogs were resolved quite well on the two CSPs with the separation factors (α) in the range of 2.49 ~ 6.35 and resolutions (RS ) in the range of 2.95 ~ 12.21. Between the two CSPs, the CSP containing residual silanol protecting n-octyl groups on the silica surface was found to be better than the CSP containing residual silanol groups.
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Affiliation(s)
- Seong Ae Ahn
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan, Republic of Korea
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23
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Liquid chromatographic resolution of fendiline and its analogues on a chiral stationary phase based on (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid. Molecules 2014; 19:21386-97. [PMID: 25532838 PMCID: PMC6271286 DOI: 10.3390/molecules191221386] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 12/05/2014] [Accepted: 12/11/2014] [Indexed: 11/16/2022] Open
Abstract
Fendiline, an effective anti-anginal drug for the treatment of coronary heart diseases, and its sixteen analogues were resolved on a CSP based on (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid. Fendiline was resolved quite well with the separation factor (α) of 1.25 and resolution (RS) of 1.55 when a mobile phase consisting of methanol-acetonitrile-trifluoroacetic acid-triethylamine at a ratio of 80/20/0.1/0.5 (v/v/v/v) was used. The comparison of the chromatographic behaviors for the resolution of fendiline and its analogues indicated that the 3,3-diphenylpropyl group bonded to the secondary amino group of fendiline is important in the chiral recognition and the difference in the steric bulkiness between the phenyl group and the methyl group at the chiral center of fendiline is also important in the chiral recognition.
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24
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Nemeth T, Levai S, F di T, Kupai J, Turos G, Toth T, Huszthy P, Balogh GT. A Novel Method for the Preparation of a Chiral Stationary Phase Containing an Enantiopure Acridino-18-Crown-6 Ether Selector. J Chromatogr Sci 2014; 53:431-5. [DOI: 10.1093/chromsci/bmu157] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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25
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New approach for chiral separation: from polysaccharide-based materials to chirality-responsive polymers. Sci China Chem 2014. [DOI: 10.1007/s11426-014-5206-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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26
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Németh T, Lévai S, Kormos A, Kupai J, Tóth T, Balogh GT, Huszthy P. Preparation and Studies of Chiral Stationary Phases Containing Enantiopure Acridino-18-Crown-6 Ether Selectors. Chirality 2014; 26:651-4. [DOI: 10.1002/chir.22361] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Accepted: 07/03/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Tamás Németh
- Budapest University of Technology and Economics; Budapest Hungary
| | - Sándor Lévai
- Compound Profiling Laboratory; Chemical Works of Gedeon Richter Plc.; Budapest Hungary
| | - Attila Kormos
- Budapest University of Technology and Economics; Budapest Hungary
| | - József Kupai
- Budapest University of Technology and Economics; Budapest Hungary
| | - Tünde Tóth
- Budapest University of Technology and Economics; Budapest Hungary
| | - György Tibor Balogh
- Compound Profiling Laboratory; Chemical Works of Gedeon Richter Plc.; Budapest Hungary
| | - Péter Huszthy
- Budapest University of Technology and Economics; Budapest Hungary
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27
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Ilisz I, Pataj Z, Gecse Z, Szakonyi Z, Fülöp F, Lindner W, Péter A. Unusual Temperature-Induced Retention Behavior of Constrained β-Amino Acid Enantiomers on the Zwitterionic Chiral Stationary Phases ZWIX(+) and ZWIX(-). Chirality 2014; 26:385-93. [DOI: 10.1002/chir.22333] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Revised: 03/24/2014] [Accepted: 03/25/2014] [Indexed: 12/31/2022]
Affiliation(s)
- István Ilisz
- Department of Inorganic and Analytical Chemistry; University of Szeged; Szeged Hungary
| | - Zoltán Pataj
- Department of Inorganic and Analytical Chemistry; University of Szeged; Szeged Hungary
| | - Zsanett Gecse
- Department of Inorganic and Analytical Chemistry; University of Szeged; Szeged Hungary
- Institute of Pharmaceutical Chemistry; University of Szeged; Szeged Hungary
| | - Zsolt Szakonyi
- Institute of Pharmaceutical Chemistry; University of Szeged; Szeged Hungary
| | - Ferenc Fülöp
- Institute of Pharmaceutical Chemistry; University of Szeged; Szeged Hungary
| | - Wolfgang Lindner
- Department of Analytical Chemistry; University of Vienna; Vienna Austria
| | - Antal Péter
- Department of Inorganic and Analytical Chemistry; University of Szeged; Szeged Hungary
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28
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Jin KB, Kim HE, Hyun MH. Liquid Chromatographic Resolution of Mexiletine and Its Analogs on Crown Ether-Based Chiral Stationary Phases. Chirality 2014; 26:272-8. [DOI: 10.1002/chir.22318] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 02/04/2014] [Accepted: 02/05/2014] [Indexed: 11/08/2022]
Affiliation(s)
- Kab Bong Jin
- Department of Chemistry and Chemistry Institute for Functional Materials; Pusan National University; Busan Republic of Korea
| | - Hee Eun Kim
- Department of Chemistry and Chemistry Institute for Functional Materials; Pusan National University; Busan Republic of Korea
| | - Myung Ho Hyun
- Department of Chemistry and Chemistry Institute for Functional Materials; Pusan National University; Busan Republic of Korea
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29
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Pataj Z, Ilisz I, Gecse Z, Szakonyi Z, Fülöp F, Lindner W, Péter A. Effect of mobile phase composition on the liquid chromatographic enantioseparation of bulky monoterpene-based β-amino acids by applying chiral stationary phases based onCinchonaalkaloid. J Sep Sci 2014; 37:1075-82. [DOI: 10.1002/jssc.201400078] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2014] [Revised: 02/19/2014] [Accepted: 02/19/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Zoltán Pataj
- Department of Inorganic and Analytical Chemistry; University of Szeged; Szeged Hungary
| | - István Ilisz
- Department of Inorganic and Analytical Chemistry; University of Szeged; Szeged Hungary
| | - Zsanett Gecse
- Department of Inorganic and Analytical Chemistry; University of Szeged; Szeged Hungary
- Institute of Pharmaceutical Chemistry; University of Szeged; Szeged Hungary
| | - Zsolt Szakonyi
- Institute of Pharmaceutical Chemistry; University of Szeged; Szeged Hungary
| | - Ferenc Fülöp
- Institute of Pharmaceutical Chemistry; University of Szeged; Szeged Hungary
| | - Wolfgang Lindner
- Department of Analytical Chemistry; University of Vienna; Vienna Austria
| | - Antal Péter
- Department of Inorganic and Analytical Chemistry; University of Szeged; Szeged Hungary
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30
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Tak KM, Park EJ, Hyun MH. Liquid chromatographic resolution of racemic rasagiline and its analogues on a chiral stationary phase based on (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid. J Sep Sci 2013; 36:3682-7. [PMID: 24106082 DOI: 10.1002/jssc.201300819] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Revised: 09/11/2013] [Accepted: 09/11/2013] [Indexed: 11/10/2022]
Abstract
A liquid chromatographic chiral stationary phase based on (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid was applied to the resolution of 15 analytes, including racemic rasagiline, a chiral drug for the treatment of Parkinson's disease, and its analogues. The composition of mobile phase was optimized to be ethanol/acetonitrile/acetic acid/triethylamine (80:20:0.2:0.3, v/v/v/v) by evaluating the chromatographic results for the resolution of five selected analytes under various mobile phase conditions. Under the optimized mobile phase conditions, racemic rasagiline was resolved quite well with a separation factor of 1.48 and resolution of 2.71 and its 14 analogues were also resolved reasonably well with separation factors of 1.06-1.54 and resolutions of 0.54-2.11. Among 15 analytes, racemic rasagiline was resolved best except for just one analyte. The analyte structure-enantioselectivity relationship indicated that racemic rasagiline has the most appropriate structural characteristics for resolution on the chiral stationary phase.
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Affiliation(s)
- Kyung Mi Tak
- Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Busan, Republic of Korea
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31
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Enantioseparations of primary amino compounds by high-performance liquid chromatography using chiral crown ether-based chiral stationary phase. Methods Mol Biol 2013. [PMID: 23283776 DOI: 10.1007/978-1-62703-263-6_9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Liquid chromatographic resolution of racemic compounds containing a primary amino group has been known to be most successful when chiral crown ether-based chiral stationary phases (CSPs) are used. Among various crown ether-based CSPs, the stationary phase based on (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid covalently bonded to silica gel has been successfully applied in the resolution of various racemic compounds containing primary amino groups. In this chapter, the preparation of the CSP based on (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid covalently bonded to silica gel and examples for the application to the enantioseparation of racemic compounds including α-amino acids, cyclic amines, amino alcohols, and chiral drugs are described.
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32
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Chiral benzimidazole-derived mono azacrowns: synthesis and enantiomer recognition studies with chiral amines and their ammonium salts. ACTA ACUST UNITED AC 2013. [DOI: 10.1016/j.tetasy.2013.04.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Merten C, Hyun MH, Xu Y. Absolute Configuration and Predominant Conformations of a Chiral Crown Ether-Based Colorimetric Sensor: A Vibrational Circular Dichroism Spectroscopy and DFT Study of Chiral Recognition. Chirality 2013; 25:294-300. [DOI: 10.1002/chir.22147] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Accepted: 11/24/2012] [Indexed: 11/06/2022]
Affiliation(s)
- Christian Merten
- Department of Chemistry; University of Alberta; Edmonton Alberta T6G2G2 Canada
| | - Myung Ho Hyun
- Department of Chemistry and Chemistry Institute for Functional Materials; Pusan National University; Busan 609-735 Republic of Korea
| | - Yunjie Xu
- Department of Chemistry; University of Alberta; Edmonton Alberta T6G2G2 Canada
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34
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Zhang C, Liu F, Li Y, Shen X, Xu X, Sakai R, Satoh T, Kakuchi T, Okamoto Y. Influence of stereoregularity and linkage groups on chiral recognition of poly(phenylacetylene) derivatives bearing L
-leucine ethyl ester pendants as chiral stationary phases for HPLC. ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26611] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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35
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Yashima E, Iida H, Okamoto Y. Enantiomeric Differentiation by Synthetic Helical Polymers. Top Curr Chem (Cham) 2013; 340:41-72. [DOI: 10.1007/128_2013_439] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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36
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Bang EJ, Jin JY, Hong JH, Kang JS, Lee WT, Lee WJ. Comparative Studies on Enantiomer Resolution of α-Amino Acids and Their Esters Using (18-Crown-6)-tetracarboxylic acid as a Chiral Crown Ether Selector by NMR Spectroscopy and High-Performance Liquid Chromatography. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.10.3481] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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37
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Park SH, Kim SJ, Hyun MH. Enantiomeric Separation of 1-(Benzofuran-2-yl)alkylamines on Chiral Stationary Phases Based on Chiral Crown Ethers. B KOREAN CHEM SOC 2012. [DOI: 10.5012/bkcs.2012.33.10.3497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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38
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Park JY, Jin KB, Hyun MH. Liquid chromatographic resolution of 3-amino-1,4-benzodiazepin-2-ones on crown ether-based chiral stationary phases. Chirality 2012; 24:427-31. [DOI: 10.1002/chir.22041] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2012] [Accepted: 02/11/2012] [Indexed: 11/09/2022]
Affiliation(s)
- Je Young Park
- Department of Chemistry and Chemistry Institute for Functional Materials; Pusan National University; Busan; 609-735; Korea
| | - Kab Bong Jin
- Department of Chemistry and Chemistry Institute for Functional Materials; Pusan National University; Busan; 609-735; Korea
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39
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40
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Cavazzini A, Pasti L, Massi A, Marchetti N, Dondi F. Recent applications in chiral high performance liquid chromatography: A review. Anal Chim Acta 2011; 706:205-22. [DOI: 10.1016/j.aca.2011.08.038] [Citation(s) in RCA: 203] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2011] [Revised: 08/08/2011] [Accepted: 08/25/2011] [Indexed: 01/17/2023]
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41
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Choi HJ, Cho HS, Lee SJ, Hyun MH. Liquid Chromatographic Resolution of Vigabatrin and Its Analogue γ-Amino Acids on Chiral Stationary Phases Based on (3,3'-Diphenyl-1,1'-binaphthyl)-20-crown-6. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.8.3017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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42
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Tamura K, Sam NSM, Ikai T, Okamoto Y, Yashima E. Synthesis and Chiral Recognition Ability of a Poly(phenylenevinylene)-Encapsulated Amylose Derivative. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2011. [DOI: 10.1246/bcsj.20110074] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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43
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Lee A, Choi HJ, Jin KB, Hyun MH. Liquid chromatographic resolution of 1-aryl-1,2,3,4-tetrahydroisoquinolines on a chiral stationary phase based on (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid. J Chromatogr A 2011; 1218:4071-6. [DOI: 10.1016/j.chroma.2011.04.088] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2011] [Revised: 04/26/2011] [Accepted: 04/29/2011] [Indexed: 12/01/2022]
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44
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Tamura K, Miyabe T, Iida H, Yashima E. Separation of enantiomers on diastereomeric right- and left-handed helical poly(phenyl isocyanide)s bearing l-alanine pendants immobilized on silica gel by HPLC. Polym Chem 2011. [DOI: 10.1039/c0py00164c] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Kim HJ, Choi HJ, Cho YJ, Hyun MH. Enantiomeric Resolution of α-Amino Acid Derivatives on Two Diastereomeric Chiral Stationary Phases Based on Chiral Crown Ethers Incorporating Two Different Chiral Units. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.6.1551] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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46
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Bwambok DK, Challa SK, Lowry M, Warner IM. Amino Acid-Based Fluorescent Chiral Ionic Liquid for Enantiomeric Recognition. Anal Chem 2010; 82:5028-37. [DOI: 10.1021/ac9027774] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David K. Bwambok
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803
| | - Santhosh K. Challa
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803
| | - Mark Lowry
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803
| | - Isiah M. Warner
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803
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47
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Rounaghi GH, Ghaemi A. Complexation of 4′-nitrobenzo-15-crown-5 with Mg2+, Ca2+, Sr2+ and Ba2+ metal cations in acetonitrile-methanol binary solutions. RUSS J INORG CHEM+ 2009. [DOI: 10.1134/s0036023609120134] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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48
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Lämmerhofer M. Chiral recognition by enantioselective liquid chromatography: mechanisms and modern chiral stationary phases. J Chromatogr A 2009; 1217:814-56. [PMID: 19906381 DOI: 10.1016/j.chroma.2009.10.022] [Citation(s) in RCA: 516] [Impact Index Per Article: 34.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2009] [Revised: 09/30/2009] [Accepted: 10/07/2009] [Indexed: 11/19/2022]
Abstract
An overview of the state-of-the-art in LC enantiomer separation is presented. This tutorial review is mainly focused on mechanisms of chiral recognition and enantiomer distinction of popular chiral selectors and corresponding chiral stationary phases including discussions of thermodynamics, additivity principle of binding increments, site-selective thermodynamics, extrathermodynamic approaches, methods employed for the investigation of dominating intermolecular interactions and complex structures such as spectroscopic methods (IR, NMR), X-ray diffraction and computational methods. Modern chiral stationary phases are discussed with particular focus on those that are commercially available and broadly used. It is attempted to provide the reader with vivid images of molecular recognition mechanisms of selected chiral selector-selectand pairs on basis of solid-state X-ray crystal structures and simulated computer models, respectively. Such snapshot images illustrated in this communication unfortunately cannot account for the molecular dynamics of the real world, but are supposed to be helpful for the understanding. The exploding number of papers about applications of various chiral stationary phases in numerous fields of enantiomer separations is not covered systematically.
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Affiliation(s)
- Michael Lämmerhofer
- Christian Doppler Laboratory for Molecular Recognition Materials, Department of Analytical Chemistry and Food Chemistry, University of Vienna, Waehringer Strasse 38, A-1090 Vienna, Austria.
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49
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Pataj Z, Berkecz R, Ilisz I, Misicka A, Tymecka D, Fülöp F, Armstrong DW, Péter A. High-performance liquid chromatographic chiral separation of β2-homoamino acids. Chirality 2009; 21:787-98. [DOI: 10.1002/chir.20670] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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50
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Effect of the Modification of the Free Carboxylic Acid Groups of an HPLC Chiral Stationary Phase Based on (+)-(18-Crown-6)-2,3,11,12-tetracarboxylic Acid on the Chiral Recognition. B KOREAN CHEM SOC 2009. [DOI: 10.5012/bkcs.2009.30.8.1903] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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