1
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Pulitelli G, Mammone FR, Sadutto D, Tanini D, Cirilli R. Virtual chiral recognition of eugenol derivatives on amylose tris(3-chloro-5-methylphenylcarbamate) chiral stationary phase in unusual normal-phase mode. Anal Chim Acta 2023; 1279:341811. [PMID: 37827619 DOI: 10.1016/j.aca.2023.341811] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 09/05/2023] [Accepted: 09/09/2023] [Indexed: 10/14/2023]
Abstract
Chromatographic enantioseparation on polysaccharide-based chiral stationary phases has undergone explosive development over the last three decades as a method for separating the enantiomers of chiral compounds on an analytical and preparative scale. In this context, understanding the nature of the intermolecular interactions involved in retention and recognition processes is an interesting scientific challenge. In the present study, three eugenol derivatives were used as chiral references to elucidate some unexplored aspects of the enantioselective and retention properties of the Chiralpak IG-U chiral stationary phase based on amylose-tris(3-chloro-5-methylphenylcarbamate). The performance of the ultra-high performance liquid chromatography chiral packing material Chiralpak IG-U was evaluated using a two-step approach. First, binary mixtures containing variable proportions of alcohol (ethanol or 2-propanol) in n-hexane were used as mobile phases and the retention factors were recorded at three different temperatures. A rational analysis of this set of chromatographic data shows the leading role played by hydrogen bond between the OH group linked to the stereogenic centre of the analytes and the active sites of the chiral chromatographic material in obtaining a high degree of enantioseparation. The retention factors were then plotted against the percentage of alcohol modifiers to obtain retention maps with a non-linear performance trend with correlation factors >0.9990. The proposed retention map model was used to extrapolate and describe virtual chiral recognition of chiral analytes on the Chiralpak IG-U chiral stationary phase under extreme elution conditions with expected run times of hundreds or thousands of years. The presented virtual chiral recognition approach is based on a generic concept and therefore opens new possibilities for understanding the performance of other polysaccharide-based chiral stationary phases.
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Affiliation(s)
- Gaia Pulitelli
- Centre for the Control and Evaluation of Medicines, Chemical Medicines Unit, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy
| | - Francesca Romana Mammone
- Centre for the Control and Evaluation of Medicines, Chemical Medicines Unit, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy
| | - Daniele Sadutto
- Centre for the Control and Evaluation of Medicines, Chemical Medicines Unit, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy
| | - Damiano Tanini
- Department of Chemistry "Ugo Schiff", University of Florence, Via Della Lastruccia 3-13, I-50019, Sesto Fiorentino, Italy
| | - Roberto Cirilli
- Centre for the Control and Evaluation of Medicines, Chemical Medicines Unit, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161, Rome, Italy.
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2
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Rizzo S, Benincori T, Fontana F, Pasini D, Cirilli R. HPLC Enantioseparation of Rigid Chiral Probes with Central, Axial, Helical, and Planar Stereogenicity on an Amylose (3,5-Dimethylphenylcarbamate) Chiral Stationary Phase. Molecules 2022; 27:molecules27238527. [PMID: 36500620 PMCID: PMC9741213 DOI: 10.3390/molecules27238527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 11/15/2022] [Accepted: 11/25/2022] [Indexed: 12/12/2022] Open
Abstract
The chiral resolving ability of the commercially available amylose (3,5-dimethylphenylcarbamate)-based chiral stationary phase (CSP) toward four chiral probes representative of four kinds of stereogenicity (central, axial, helical, and planar) was investigated. Besides chirality, the evident structural feature of selectands is an extremely limited conformational freedom. The chiral rigid analytes were analyzed by using pure short alcohols as mobile phases at different column temperatures. The enantioselectivity was found to be suitable for all compounds investigated. This evidence confirms that the use of the amylose-based CSP in HPLC is an effective strategy for obtaining the resolution of chiral compounds containing any kind of stereogenic element. In addition, the experimental retention and enantioselectivity behavior, as well as the established enantiomer elution order of the investigated chiral analytes, may be used as key information to track essential details on the enantiorecognition mechanism of the amylose-based chiral stationary phase.
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Affiliation(s)
- Simona Rizzo
- CNR Istituto di Scienze e Tecnologie Chimiche “Giulio Natta”, Via C. Golgi 19, 20133 Milano, Italy
| | - Tiziana Benincori
- Dipartimento di Scienza e Alta Tecnologia, Università degli Studi dell’Insubria, Via Valleggio 11, 22100 Como, Italy
| | - Francesca Fontana
- Dipartimento di Ingegneria e Scienze Applicate, Università di Bergamo, Viale Marconi 5, 24044 Dalmine, Italy
- CSGI Bergamo R.U., Viale Marconi 5, 24044 Dalmine, Italy
| | - Dario Pasini
- Department of Chemistry and INSTM Research Unit, University of Pavia, 27100 Pavia, Italy
| | - Roberto Cirilli
- Centro Nazionale per il Controllo e la Valutazione dei Farmaci, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy
- Correspondence:
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3
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Konjaria ML, Kakava R, Volonterio A, Chankvetadze B, Scriba GK. Enantioseparation of chiral (benzylsulfinyl)benzamide sulfoxides by capillary electrophoresis using cyclodextrins as chiral selectors. J Chromatogr A 2022; 1672:463027. [DOI: 10.1016/j.chroma.2022.463027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 03/30/2022] [Accepted: 03/31/2022] [Indexed: 11/16/2022]
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4
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Rosetti A, Preda G, Villani C, Pierini M, Pasini D, Cirilli R. Triptycene derivatives as chiral probes for studying the molecular enantiorecognition on sub-2-μm particle cellulose tris(3,5-dimethylphenylcarbamate) chiral stationary phase. Chirality 2021; 33:883-890. [PMID: 34571576 DOI: 10.1002/chir.23358] [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: 06/25/2021] [Revised: 08/04/2021] [Accepted: 08/26/2021] [Indexed: 11/09/2022]
Abstract
Two chiral triptycene derivatives were analyzed on the Chiralpak IB-U column packed with cellulose tris(3,5-dimethylphenylcarbamate)-based sub-2-μm diameter particles. Under normal-phase conditions, sub-minute baseline enantioseparations were obtained. Differences in structural elements and chromatographic behavior of the investigated compounds were evaluated to identify the interactions that drive the chiral discrimination process. From the evaluation of the experimental chromatographic data, it was found that hydrogen bond formation is essential for the separation of enantiomers.
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Affiliation(s)
- Alessia Rosetti
- Department of Chemistry and Drug Technology, Sapienza University of Rome, Rome, Italy
| | - Giovanni Preda
- Department of Chemistry and INSTM Research Unit, University of Pavia, Pavia, Italy
| | - Claudio Villani
- Department of Chemistry and Drug Technology, Sapienza University of Rome, Rome, Italy
| | - Marco Pierini
- Department of Chemistry and Drug Technology, Sapienza University of Rome, Rome, Italy
| | - Dario Pasini
- Department of Chemistry and INSTM Research Unit, University of Pavia, Pavia, Italy
| | - Roberto Cirilli
- National Center for the Control and Evaluation of Drugs, Istituto Superiore di Sanità, Rome, Italy
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5
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The molecular bases of chiral recognition in 2-(benzylsulfinyl)benzamide enantioseparation. Anal Chim Acta 2021; 1141:194-205. [DOI: 10.1016/j.aca.2020.10.050] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2020] [Revised: 10/19/2020] [Accepted: 10/23/2020] [Indexed: 12/13/2022]
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6
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Dascalu AE, Speybrouck D, Billamboz M, Corens D, Ghinet A, Lipka E. Analytical and preparative enantioseparations in supercritical fluid chromatography using different brands of immobilized cellulose tris (3,5-dichlorophenylcarbamate) columns: Some differences. J Chromatogr A 2020; 1622:461125. [PMID: 32381300 DOI: 10.1016/j.chroma.2020.461125] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 04/08/2020] [Accepted: 04/09/2020] [Indexed: 11/28/2022]
Abstract
The aim of this study was to determine the impact of the origin and the manufacturing processes of the chiral stationary phases (CSPs) on their chromatographic behaviors. Hence, four chiral stationary phases based on immobilized tris (3,5-dichlorophenylcarbamate) derivative of cellulose supplied by four different manufacturers were evaluated. A set of twenty-nine compounds, including commercially available and in-house synthesized compounds, with a broad range of lipophilicity and polarity was chosen. Three main parameters were evaluated on all stationary phases: retention factor, selectivity and loading capacity. This work highlighted that the retention factor strongly varied according to the manufacturer. Regardless of the characteristic of the tested compounds i.e. neutral, acidic or basic, there was a trend in retention ability of the four chiral stationary phases: retention was increasing from CHIRAL ART Cellulose-SC, REFLECT I-Cellulose C, Chiralpak IC to Lux i-Cellulose-5. On the contrary, selectivity did not follow the same trend as retention. The difference in selectivity between each column towards one compound was quite low while the difference in resolution depended on the nature of the compounds investigated and was significant in certain cases. Finally, the four different columns presented similar and high loading capacity.
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Affiliation(s)
- Anca-Elena Dascalu
- U1167 Inserm RID-AGE, Université de Lille, F-59000 Lille, France; Yncréa Hauts-de-France, Laboratory of Sustainable Chemistry and Health, Health & Environment Department, Team Sustainable Chemistry, Ecole des Hautes Etudes d'Ingénieur (HEI), UCLille, 13 rue de Toul, F-59046 Lille, France; UFR Pharmacie, Laboratoire de Chimie Analytique, BP 83, F-59006 Lille, France; Alexandru Ioan Cuza' University of Iasi, Faculty of Chemistry, Bd. Carol I nr. 11, 700506, Romania
| | - David Speybrouck
- Discovery Sciences, Janssen Research and Development, Campus de Maigremont, F-27106 Val de Reuil, Cedex, France
| | - Muriel Billamboz
- U1167 Inserm RID-AGE, Université de Lille, F-59000 Lille, France; Yncréa Hauts-de-France, Laboratory of Sustainable Chemistry and Health, Health & Environment Department, Team Sustainable Chemistry, Ecole des Hautes Etudes d'Ingénieur (HEI), UCLille, 13 rue de Toul, F-59046 Lille, France
| | - David Corens
- Discovery Sciences, Janssen Research and Development, Janssen Pharmaceutica NV, Turnhoutseweg 30, 2340 Beerse, Belgium
| | - Alina Ghinet
- U1167 Inserm RID-AGE, Université de Lille, F-59000 Lille, France; Yncréa Hauts-de-France, Laboratory of Sustainable Chemistry and Health, Health & Environment Department, Team Sustainable Chemistry, Ecole des Hautes Etudes d'Ingénieur (HEI), UCLille, 13 rue de Toul, F-59046 Lille, France; Alexandru Ioan Cuza' University of Iasi, Faculty of Chemistry, Bd. Carol I nr. 11, 700506, Romania
| | - Emmanuelle Lipka
- U1167 Inserm RID-AGE, Université de Lille, F-59000 Lille, France; UFR Pharmacie, Laboratoire de Chimie Analytique, BP 83, F-59006 Lille, France.
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7
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Enantioseparation using chitosan 2-isopropylthiourea-3,6-dicarbamate derivatives as chiral stationary phases for high-performance liquid chromatography. J Chromatogr A 2020; 1623:461174. [DOI: 10.1016/j.chroma.2020.461174] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 04/24/2020] [Accepted: 04/25/2020] [Indexed: 11/23/2022]
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8
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Zhang Q, Zhang J, Wang X, Yu J, Guo X. Enantioseparation of Eight Pairs of Tetralone Derivative Enantiomers on Cellulose Based Chiral Stationary Phase by HPLC. CURR PHARM ANAL 2020. [DOI: 10.2174/1573412915666181130111103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Tetralone derivatives, important resources for the development of new drugs
which can act in the treatment of central nervous system disorders or participate in synthesis reaction
for the synthesis of various pharmaceuticals, have great research value and a bright prospect in exploitation.
Methods:
A novel chiral HPLC method for efficient enantioseparation of eight tetralone derivative enantiomers
was developed on cellulose based CHIRALPAK IC chiral stationary phase under normal
mode by investigating the effects of type and content of organic modifier, column temperature and flow
rate on retention and enantioselectivity. Besides, the specificity, linearity, stability, precision, accuracy
and robustness of this method were also validated.
Results:
Satisfactory enantioseparation was obtained for all enantiomers in n-hexane/2-propanol mobile
phase system at ambient temperature. The thermodynamic study indicated that the solute transfer from
the mobile to stationary phase was enthalpically favorable, and the process of enantioseparation was
mainly enthalpy controlled. This method met the requirements for quantitative determination of tetralone
derivative enantiomers.
Conclusion:
This study can provide great and important application value for enantioseparation of eight
pairs of newly synthesized tetralone derivative enantiomers under normal mode using CHIRALPAK IC
chiral column.
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Affiliation(s)
- Qiongwen Zhang
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road Shenhe District, 110016, Shenyang, Liaoning Province, China
| | - Junyuan Zhang
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road Shenhe District, 110016, Shenyang, Liaoning Province, China
| | - Xia Wang
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road Shenhe District, 110016, Shenyang, Liaoning Province, China
| | - Jia Yu
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road Shenhe District, 110016, Shenyang, Liaoning Province, China
| | - Xingjie Guo
- School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road Shenhe District, 110016, Shenyang, Liaoning Province, China
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9
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Chankvetadze B. Recent trends in preparation, investigation and application of polysaccharide-based chiral stationary phases for separation of enantiomers in high-performance liquid chromatography. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2019.115709] [Citation(s) in RCA: 96] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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10
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Shedania Z, Kakava R, Volonterio A, Farkas T, Chankvetadze B. Separation of enantiomers of chiral sulfoxides in high-performance liquid chromatography with cellulose-based chiral selectors using acetonitrile and acetonitrile-water mixtures as mobile phases. J Chromatogr A 2020; 1609:460445. [DOI: 10.1016/j.chroma.2019.460445] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 08/03/2019] [Accepted: 08/08/2019] [Indexed: 10/26/2022]
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11
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Carradori S, Secci D, Guglielmi P, Pierini M, Cirilli R. High-performance liquid chromatography enantioseparation of chiral 2-(benzylsulfinyl)benzamide derivatives on cellulose tris(3,5-dichlorophenylcarbamate) chiral stationary phase. J Chromatogr A 2019; 1610:460572. [PMID: 31606155 DOI: 10.1016/j.chroma.2019.460572] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 09/19/2019] [Accepted: 09/25/2019] [Indexed: 11/16/2022]
Abstract
Recently it has been reported that immobilized chlorinated-type chiral stationary phases based on cellulose tris(3,5-dichlorophenylcarbamate) are able to express an outstanding enantioselectivity towards the structure of 2-(benzylsulfinyl)benzamide. We now introduce two homologue series of chiral sulfoxides based on the same 2-(sulfinyl)benzoyl core as the prototype of new selectands for HPLC, whose enantioselectivity could be modulable through the replacement of the benzyl group with an unbranched alkyl chain varying in length from 1 to 5 carbon atoms. HPLC parameters such as mobile phase composition and column temperature have been carefully evaluated in order to get pertinent structure-enantioselectivity relationships. The enantiomer elution order was unambiguously determined by a combined strategy involving theoretical and experimental procedures. Two cases of temperature-dependent inversion of the elution order of enantiomers in the operative temperature range of chiral chromatographic support were observed.
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Affiliation(s)
- Simone Carradori
- Dipartimento di Farmacia, Università "G. d'Annunzio" di Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy
| | - Daniela Secci
- Dipartimento di Chimica e Tecnologie del Farmaco, "Sapienza" Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
| | - Paolo Guglielmi
- Dipartimento di Chimica e Tecnologie del Farmaco, "Sapienza" Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
| | - Marco Pierini
- Dipartimento di Chimica e Tecnologie del Farmaco, "Sapienza" Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
| | - Roberto Cirilli
- Centro nazionale per il controllo e la valutazione dei farmaci, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy.
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12
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Zhao Y, Li S, Wang X, Yu J, Song Y, Guo X. Enantioseparation and molecular modeling study of five β‐adrenergic blockers on
C
hiralpak
IC
column. Chirality 2019; 31:502-512. [DOI: 10.1002/chir.23074] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 03/12/2019] [Accepted: 03/28/2019] [Indexed: 12/29/2022]
Affiliation(s)
- Yu Zhao
- Department Pharmaceutical AnalysisInstitution Shenyang Pharmaceutical University Shenyang Liaoning Province P.R. China
| | - Shuang Li
- Department Pharmaceutical AnalysisInstitution Shenyang Pharmaceutical University Shenyang Liaoning Province P.R. China
| | - Xia Wang
- Department Pharmaceutical AnalysisInstitution Shenyang Pharmaceutical University Shenyang Liaoning Province P.R. China
| | - Jia Yu
- Department Pharmaceutical AnalysisInstitution Shenyang Pharmaceutical University Shenyang Liaoning Province P.R. China
| | - Yongbo Song
- Department Life Science and Bio‐pharmaceuticsInstitution Shenyang Pharmaceutical University Shenyang Liaoning Province P.R. China
| | - Xingjie Guo
- Department Pharmaceutical AnalysisInstitution Shenyang Pharmaceutical University Shenyang Liaoning Province P.R. China
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13
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Dai X, Bi W, Sun M, Wang F, Shen J, Okamoto Y. Chiral recognition ability of amylose derivatives bearing regioselectively different carbamate pendants at 2,3- and 6-positions. Carbohydr Polym 2019; 218:30-36. [PMID: 31221334 DOI: 10.1016/j.carbpol.2019.03.052] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 03/14/2019] [Accepted: 03/14/2019] [Indexed: 01/05/2023]
Abstract
Seven amylose derivatives bearing two regioselective carbamate pendants at 2,3- and 6-positions of a glucose unit were synthesized through protection and deprotection at the 6-position. The chiral recognition abilities of the obtained derivatives were evaluated as the chiral stationary phases (CSPs) for high-performance liquid chromatography (HPLC). Each derivative had its own characteristic recognition ability depending on the arrangement of carbamate pendants at the three positions. The nature, position and number of the substituents on the aromatic moieties of pendants play a significant role on the chiral recognition ability of these derivatives. Most amylose derivatives exhibit good enantioselectivity for the racemates in this study, and those bearing electron-withdrawing para-chlorophenylcarbamates at 2- and 3-positions possessed relatively better chiral recognition than others. Some racemates could be better resolved on the amylose derivatives with different pendants than on Chiralpak AD, one of the most powerful commercially available chiral columns derived from amylose tris(3,5-dimethylphenylcarbamate).
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Affiliation(s)
- Xiao Dai
- Polymer Materials Research Center, Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China
| | - Wanying Bi
- Polymer Materials Research Center, Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China
| | - Mengchen Sun
- Polymer Materials Research Center, Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China
| | - Fan Wang
- Polymer Materials Research Center, Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China
| | - Jun Shen
- Polymer Materials Research Center, Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China.
| | - Yoshio Okamoto
- Polymer Materials Research Center, Key Laboratory of Superlight Materials and Surface Technology, Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China; Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
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14
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Shen J, Wang F, Bi W, Liu B, Liu S, Okamoto Y. Synthesis of cellulose carbamates bearing regioselective substituents at 2,3- and 6-positions for efficient chromatographic enantioseparation. J Chromatogr A 2018; 1572:54-61. [DOI: 10.1016/j.chroma.2018.08.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 07/17/2018] [Accepted: 08/15/2018] [Indexed: 10/28/2022]
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15
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Khatiashvili T, Kakava R, Matarashvili I, Tabani H, Fanali C, Volonterio A, Farkas T, Chankvetadze B. Separation of enantiomers of selected chiral sulfoxides with cellulose tris(4-chloro-3-methylphenylcarbamate)-based chiral columns in high-performance liquid chromatography with very high separation factor. J Chromatogr A 2018; 1545:59-66. [DOI: 10.1016/j.chroma.2018.02.054] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2018] [Revised: 02/17/2018] [Accepted: 02/25/2018] [Indexed: 11/16/2022]
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