1
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Tai HC, Lin Z, Fabiano A, Zhou Y, Saurer EM, Ye YK, He BL. Evaluation of Chiral Normal-Phase Liquid Chromatography as a Secondary Tier in Pharmaceutical Chiral Screening Strategy. J Chromatogr A 2022; 1672:463053. [DOI: 10.1016/j.chroma.2022.463053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 04/08/2022] [Accepted: 04/10/2022] [Indexed: 10/18/2022]
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2
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Ali I, Raja R, Alam SD, Shirsath V, K. Jain A, Locatelli M, David V. A comparison of chiral separations by supercritical fluid chromatography and high-performance liquid chromatography. J LIQ CHROMATOGR R T 2021. [DOI: 10.1080/10826076.2021.1979037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Imran Ali
- Department of Chemistry, Jamia Millia Islamia, New Delhi, India
| | - Rupak Raja
- Department of Chemistry, School of Basic and Applied Sciences, Galgotias University, Greater Noida, India
- Jubilant Biosys Limited, Noida, India
| | | | | | - Arvind K. Jain
- Department of Chemistry, School of Basic and Applied Sciences, Galgotias University, Greater Noida, India
| | - Marcello Locatelli
- Department of Pharmacy, Analytical and Bioanalytical Chemistry, University “G. d’Annunzio” of Chieti-Pescara, Chieti, Italy
| | - Victor David
- Department of Analytical Chemistry, University of Bucharest, Romania
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3
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Surface molecular imprinting of nylon fibers for chiral recognition ofd‐phenyllactic acid. POLYM INT 2019. [DOI: 10.1002/pi.5850] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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4
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Ahmadabad FK, Pourayoubi M, Bakhshi H. Chiral phosphoric triamide‐based polymers for enantioseparation. J Appl Polym Sci 2019. [DOI: 10.1002/app.48034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
| | - Mehrdad Pourayoubi
- Department of Chemistry, Faculty of ScienceFerdowsi University of Mashhad Mashhad Iran
| | - Hadi Bakhshi
- Macromolecular Chemistry IIUniversity of Bayreuth Universitätsstraße 30, 95440 Bayreuth Germany
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5
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Knežević A, Novak J, Vinković V. New Brush-Type Chiral Stationary Phases for Enantioseparation of Pharmaceutical Drugs. Molecules 2019; 24:molecules24040823. [PMID: 30823585 PMCID: PMC6412842 DOI: 10.3390/molecules24040823] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 02/20/2019] [Accepted: 02/21/2019] [Indexed: 11/25/2022] Open
Abstract
The importance of chirality in drug development is unquestionable, with chiral liquid chromatography (LC) being the most adequate technique for its analysis. Among the various types of chiral stationary phases (CSPs) for LC, brush-type CSPs provide the base for interaction analysis of CSPs and enantiomers, which provide valuable results that can be applied to interaction studies of other CSP types. In order to analyze the influence of aromatic interactions in chiral recognition, we designed a set of ten new brush-type CSPs based on (S)-N-(1-aryl-propyl)-3,5-dinitrobenzamides which differ in the aromatic unit directly linked to the chiral center. Thirty diverse racemates, including several nonsteroidal anti-inflammatory drugs and 3-hydroxybenzodiazepine drugs, were used to evaluate the prepared CSPs. Chromatographic analysis showed that the three new CSPs separate enantiomers of a wide range of compounds and their chromatographic behavior is comparable to the most versatile brush-type CSP—Whelk-O1. The critical role of the nonbonding interactions in positioning of the analyte (naproxen) in the cleft of CSP-6, as well as the analysis of interactions that make enantioseparation possible, were elucidated using computational methods. Furthermore, the influence of acetic acid as a mobile phase additive, on this enantiorecognition process was corroborated by calculations.
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Affiliation(s)
- Anamarija Knežević
- Division of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička cesta 54, Zagreb 10000, Croatia.
| | - Jurica Novak
- Division of Physical Chemistry, Ruđer Bošković Institute, Bijenička cesta 54, Zagreb 10000, Croatia.
- South Ural State University, 20-A, Tchaikovsky Str., Chelyabinsk 454080, Russia.
| | - Vladimir Vinković
- Division of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička cesta 54, Zagreb 10000, Croatia.
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6
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Karimi Ahmadabad F, Pourayoubi M, Bakhshi H. Decorated single-enantiomer phosphoramide-based silica/magnetic nanocomposites for direct enantioseparation. RSC Adv 2019; 9:27147-27156. [PMID: 35529218 PMCID: PMC9070676 DOI: 10.1039/c9ra03260f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 08/16/2019] [Indexed: 01/31/2023] Open
Abstract
The nano-composites Fe3O4@SiO2@PTA(+) and Fe3O4@SiO2@PTA(−) (PTA: phosphoric triamide) were prepared and used for the chiral separation of five racemic mixtures.
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Affiliation(s)
| | - Mehrdad Pourayoubi
- Department of Chemistry
- Faculty of Science
- Ferdowsi University of Mashhad
- Mashhad
- Iran
| | - Hadi Bakhshi
- Macromolecular Chemistry II
- University of Bayreuth
- 95440 Bayreuth
- Germany
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7
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Tunable normal phase enantioselectivity of amino acid esters via mobile phase composition. J Chromatogr A 2018; 1562:128-133. [PMID: 29859686 DOI: 10.1016/j.chroma.2018.05.054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 05/25/2018] [Accepted: 05/26/2018] [Indexed: 11/23/2022]
Abstract
The ability to tune chiral selectivity through mobile phase modifiers is a powerful tool in chiral separations. Beyond improving efficiency and/or resolution, some mobile phase systems can even invert elution order, a highly desirable result for trace analyses or preparative scale isolations. Previous work has demonstrated that acidic modifiers, such as ethanesulfonic acid (ESA), can greatly impact separations of enantiomers. However, prior studies were primarily performed on coated chiral stationary phases (CSPs), which limited the selection of the bulk mobile phase component. In this work, the effect of ESA modifier was studied for the enantioseparation of six pairs of amino acid esters on a CHIRALPAK® IA column, an immobilized amylose-based CSP, with different combinations of standard solvents (hexane and ethanol) as well as "non-standard" solvents, such as methyl t-butyl ether, ethyl acetate, tetrahydrofuran, acetone, or 1,4-dioxane. ESA generally improved selectivity, and multiple instances of elution order reversal were observed. A Van Deemter plot study reveals that ESA exerts its effect by pulling the enantiomer deeper into the chiral cavity of the chiral polymer to increase the interactions between the analytes and the stationary phase, which is the main reason for the increased enantioselectivity.
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8
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Li M, Zhao Y, Zhou L, Yu J, Wang J, Guo X. Study of the enantiomeric separation of the anticholinergic drugs on two immobilized polysaccharide-based chiral stationary phases by HPLC and the possible chiral recognition mechanisms. Electrophoresis 2018. [DOI: 10.1002/elps.201800039] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Meng Li
- School of Pharmacy; Shenyang Pharmaceutical University; Shenyang P. R. China
| | - Yu Zhao
- School of Pharmacy; Shenyang Pharmaceutical University; Shenyang P. R. China
| | - Li Zhou
- School of Pharmacy; Shenyang Pharmaceutical University; Shenyang P. R. China
| | - Jia Yu
- School of Pharmacy; Shenyang Pharmaceutical University; Shenyang P. R. China
| | - Jian Wang
- School of Pharmaceutical Engineering; Shenyang Pharmaceutical University; Shenyang P. R. China
| | - Xingjie Guo
- School of Pharmacy; Shenyang Pharmaceutical University; Shenyang P. R. China
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9
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Lin C, Fan J, Liu W, Chen X, Ruan L, Zhang W. A new single-urea-bound 3,5-dimethylphenylcarbamoylated β-cyclodextrin chiral stationary phase and its enhanced separation performance in normal-phase liquid chromatography. Electrophoresis 2017; 39:348-355. [DOI: 10.1002/elps.201700273] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Revised: 10/04/2017] [Accepted: 10/06/2017] [Indexed: 11/05/2022]
Affiliation(s)
- Chun Lin
- School of Chemistry and Environment; South China Normal University; Guangzhou P. R. China
- School of Logistics; Beijing Normal University; Zhuhai Campus, Zhuhai P. R. China
| | - Jun Fan
- School of Chemistry and Environment; South China Normal University; Guangzhou P. R. China
| | - Wenna Liu
- School of Chemistry and Environment; South China Normal University; Guangzhou P. R. China
| | - Xiaodong Chen
- School of Chemistry and Environment; South China Normal University; Guangzhou P. R. China
- Guangdong Yanjie Pharmatech Co. Ltd.; Guangzhou P. R. China
| | - Lijun Ruan
- School of Chemistry and Environment; South China Normal University; Guangzhou P. R. China
- Guangdong Yanjie Pharmatech Co. Ltd.; Guangzhou P. R. China
| | - Weiguang Zhang
- School of Chemistry and Environment; South China Normal University; Guangzhou P. R. China
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10
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Integrating a post-column makeup pump into preparative supercritical fluid chromatography systems to address stability and recovery issues during purifications. J Chromatogr A 2017; 1511:101-106. [DOI: 10.1016/j.chroma.2017.06.063] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 06/22/2017] [Accepted: 06/23/2017] [Indexed: 11/22/2022]
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11
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Speybrouck D, Doublet C, Cardinael P, Fiol-Petit C, Corens D. The effect of high concentration additive on chiral separations in supercritical fluid chromatography. J Chromatogr A 2017; 1510:89-99. [DOI: 10.1016/j.chroma.2017.06.049] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 06/15/2017] [Accepted: 06/16/2017] [Indexed: 11/17/2022]
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12
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Gumustas M, Ozkan SA, Chankvetadze B. Separation and elution order of the enantiomers of some β-agonists using polysaccharide-based chiral columns and normal phase eluents by high-performance liquid chromatography. J Chromatogr A 2016; 1467:297-305. [DOI: 10.1016/j.chroma.2016.08.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 08/02/2016] [Accepted: 08/05/2016] [Indexed: 10/21/2022]
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13
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Gogaladze K, Chankvetadze L, Tsintsadze M, Farkas T, Chankvetadze B. Effect of Basic and Acidic Additives on the Separation of Some Basic Drug Enantiomers on Polysaccharide-Based Chiral Columns With Acetonitrile as Mobile Phase. Chirality 2015; 27:228-34. [DOI: 10.1002/chir.22417] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Accepted: 10/16/2014] [Indexed: 01/26/2023]
Affiliation(s)
- Khatuna Gogaladze
- Institute of Physical and Analytical Chemistry, School of Exact and Natural Sciences; Tbilisi State University; Tbilisi Georgia
| | - Lali Chankvetadze
- Institute of Physical and Analytical Chemistry, School of Exact and Natural Sciences; Tbilisi State University; Tbilisi Georgia
| | - Maia Tsintsadze
- Faculty of Chemistry; Georgian Technical University; Tbilisi Georgia
| | | | - Bezhan Chankvetadze
- Institute of Physical and Analytical Chemistry, School of Exact and Natural Sciences; Tbilisi State University; Tbilisi Georgia
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14
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Sardella R, Levent S, Ianni F, Çalişkan B, Gerstmeier J, Pergola C, Werz O, Banoglu E, Natalini B. Chromatographic separation and biological evaluation of benzimidazole derivative enantiomers as inhibitors of leukotriene biosynthesis. J Pharm Biomed Anal 2014; 89:88-92. [DOI: 10.1016/j.jpba.2013.10.039] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 10/23/2013] [Indexed: 11/28/2022]
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15
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On the effect of basic and acidic additives on the separation of the enantiomers of some basic drugs with polysaccharide-based chiral selectors and polar organic mobile phases. J Chromatogr A 2013; 1317:167-74. [DOI: 10.1016/j.chroma.2013.08.029] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Revised: 08/02/2013] [Accepted: 08/07/2013] [Indexed: 11/21/2022]
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16
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Sardella R, Ianni F, Lisanti A, Marinozzi M, Scorzoni S, Natalini B. The effect of mobile phase composition in the enantioseparation of pharmaceutically relevant compounds with polysaccharide-based stationary phases. Biomed Chromatogr 2013; 28:159-67. [DOI: 10.1002/bmc.3015] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 07/08/2013] [Accepted: 07/08/2013] [Indexed: 11/12/2022]
Affiliation(s)
- Roccaldo Sardella
- Dipartimento di Chimica e Tecnologia del Farmaco; Via del Liceo 1 06123 Perugia Italy
| | - Federica Ianni
- Dipartimento di Chimica e Tecnologia del Farmaco; Via del Liceo 1 06123 Perugia Italy
| | - Antonella Lisanti
- Dipartimento di Chimica e Tecnologia del Farmaco; Via del Liceo 1 06123 Perugia Italy
| | - Maura Marinozzi
- Dipartimento di Chimica e Tecnologia del Farmaco; Via del Liceo 1 06123 Perugia Italy
| | - Stefania Scorzoni
- Dipartimento di Chimica e Tecnologia del Farmaco; Via del Liceo 1 06123 Perugia Italy
| | - Benedetto Natalini
- Dipartimento di Chimica e Tecnologia del Farmaco; Via del Liceo 1 06123 Perugia Italy
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17
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De Klerck K, Mangelings D, Vander Heyden Y. Supercritical fluid chromatography for the enantioseparation of pharmaceuticals. J Pharm Biomed Anal 2012; 69:77-92. [DOI: 10.1016/j.jpba.2012.01.021] [Citation(s) in RCA: 141] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 01/18/2012] [Accepted: 01/19/2012] [Indexed: 11/30/2022]
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18
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Xu J, Zhao W, Ning Y, Bashari M, Chen Y, Jin Z, Yang N, Xu X. Enantiomer separation of phenyllactic acid by HPLC with Hp-β-cyclodextrin as chiral mobile phase additive. J INCL PHENOM MACRO 2012. [DOI: 10.1007/s10847-012-0228-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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19
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Agustian J, Kamaruddin AH, Aboul-Enein HY. Chromatographic comparison of atenolol separation in reaction media on cellulose tris-(3,5-dimethylphenylcarbamate) chiral stationary phase using ultra fast liquid chromatography. Chirality 2012; 24:356-67. [DOI: 10.1002/chir.22019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2011] [Accepted: 01/24/2012] [Indexed: 11/08/2022]
Affiliation(s)
| | - Azlina Harun Kamaruddin
- School of Chemical Engineering; Universiti Sains Malaysia; Seberang Perai Selatan; Pulau Pinang; Malaysia
| | - Hassan Y. Aboul-Enein
- Pharmaceutical and Medicinal Chemistry Department; National Research Centre; Dokki; Cairo; Egypt
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20
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Chiral separations in normal phase liquid chromatography: Enantioselectivity of recently commercialized polysaccharide-based selectors. Part I: Enantioselectivity under generic screening conditions. J Pharm Biomed Anal 2011; 55:414-23. [DOI: 10.1016/j.jpba.2011.02.015] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2010] [Revised: 02/03/2011] [Accepted: 02/10/2011] [Indexed: 11/22/2022]
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21
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Kažoka H, Rotkaja O, Varačeva L. Enantioseparation of 1-Phenyl-1,2,3,4-tetrahydroisoquinoline on Polysaccharide-Based Chiral Stationary Phases. Chromatographia 2011. [DOI: 10.1007/s10337-011-1991-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Synthesis and chromatographic resolution of conformationally constrained analogues of homotaurine. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.08.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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23
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Kasat RB, Franses EI, Wang NHL. Experimental and computational studies of enantioseparation of structurally similar chiral compounds on amylose tris(3,5-dimethylphenylcarbamate). Chirality 2009; 22:565-79. [DOI: 10.1002/chir.20791] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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24
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Huang SH, Zhang JY, Li SR, Yin CQ, Pan ZQ, Bai ZW. Preparation and Enantioseparation of Polymer-type Chiral Stationary Phases Derived from (1S,2R)-(+)-2-Amino-1,2-diphenylethanol. J LIQ CHROMATOGR R T 2008. [DOI: 10.1080/10826070802352744] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Shao-Hua Huang
- a Key Laboratory of Green Chemical Process of Ministry of Education, Wuhan Institute of Technology , Wuhan, P.R. China
| | - Jun-Yi Zhang
- a Key Laboratory of Green Chemical Process of Ministry of Education, Wuhan Institute of Technology , Wuhan, P.R. China
| | - Shi-Rong Li
- a Key Laboratory of Green Chemical Process of Ministry of Education, Wuhan Institute of Technology , Wuhan, P.R. China
| | - Chuan-Qi Yin
- a Key Laboratory of Green Chemical Process of Ministry of Education, Wuhan Institute of Technology , Wuhan, P.R. China
| | - Zhi-Quan Pan
- a Key Laboratory of Green Chemical Process of Ministry of Education, Wuhan Institute of Technology , Wuhan, P.R. China
| | - Zheng-Wu Bai
- a Key Laboratory of Green Chemical Process of Ministry of Education, Wuhan Institute of Technology , Wuhan, P.R. China
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25
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Ates H, Mangelings D, Vander Heyden Y. Fast generic chiral separation strategies using electrophoretic and liquid chromatographic techniques. J Pharm Biomed Anal 2008; 48:288-94. [DOI: 10.1016/j.jpba.2007.12.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2007] [Accepted: 12/09/2007] [Indexed: 11/29/2022]
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26
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Mie A, Ray A, Axelsson BO, Jörntén-Karlsson M, Reimann CT. Terbutaline Enantiomer Separation and Quantification by Complexation and Field Asymmetric Ion Mobility Spectrometry−Tandem Mass Spectrometry. Anal Chem 2008; 80:4133-40. [DOI: 10.1021/ac702262k] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Axel Mie
- Department of Analytical Chemistry, Chemical Centre, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden, Analytical Development, AstraZeneca R&D, Loughborough, United Kingdom, and Analytical Development, AstraZeneca R&D, SE-221 87 Lund, Sweden
| | - Andrew Ray
- Department of Analytical Chemistry, Chemical Centre, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden, Analytical Development, AstraZeneca R&D, Loughborough, United Kingdom, and Analytical Development, AstraZeneca R&D, SE-221 87 Lund, Sweden
| | - Bengt-Olof Axelsson
- Department of Analytical Chemistry, Chemical Centre, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden, Analytical Development, AstraZeneca R&D, Loughborough, United Kingdom, and Analytical Development, AstraZeneca R&D, SE-221 87 Lund, Sweden
| | - Magnus Jörntén-Karlsson
- Department of Analytical Chemistry, Chemical Centre, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden, Analytical Development, AstraZeneca R&D, Loughborough, United Kingdom, and Analytical Development, AstraZeneca R&D, SE-221 87 Lund, Sweden
| | - Curt T. Reimann
- Department of Analytical Chemistry, Chemical Centre, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden, Analytical Development, AstraZeneca R&D, Loughborough, United Kingdom, and Analytical Development, AstraZeneca R&D, SE-221 87 Lund, Sweden
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27
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Effects of diethylamine on Capillary Chromatographic Enantioseparation of Some Chiral Analytes Using Polysaccharide Stationary Phases with Pure Polar Solvents as Mobile Phases. B KOREAN CHEM SOC 2007. [DOI: 10.5012/bkcs.2007.28.6.1035] [Citation(s) in RCA: 3] [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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28
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Kasat RB, Wang NHL, Franses EI. Effects of Backbone and Side Chain on the Molecular Environments of Chiral Cavities in Polysaccharide-Based Biopolymers. Biomacromolecules 2007; 8:1676-85. [PMID: 17439279 DOI: 10.1021/bm070006h] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The effects of the backbone and side chain on the molecular environments in the chiral cavities of three commercially important polysaccharide-based chiral sorbents--cellulose tris(3,5-dimethylphenylcarbamate) (CDMPC), amylose tris(3,5-dimethylphenylcarbamate) (ADMPC), and amylose tris[(S)-alpha-methylbenzylcarbamate] (ASMBC)--are studied by attenuated total reflection infrared spectroscopy (ATR-IR), X-ray diffraction (XRD), 13C cross-polarization/magic-angle spinning (CP/MAS) and MAS solid-state NMR, and density functional theory (DFT) modeling. These sorbents are used widely in preparative-scale chiral separations. ATR-IR is used to determine how the H-bonding states of the C=O and NH groups of the polymer depend on the backbone and side chain. The changes in the polymer crystallinity are characterized with XRD. The changes in the polymer helicity and molecular mobility for polymer-coated silica beads (commercially called Chiralcel OD, Chirapak AD, and Chiralpak AS) are probed with 13C CP/MAS and MAS solid-state NMR. The IR wavenumbers and the NMR chemical shifts for the polymer backbone monomers and dimers and the side chains are predicted at the DFT/B3LYP/6-311+g(d,p) level of theory. It is concluded that the molecular environments of the C=O, NH, and phenyl groups show significant differences in intramolecular and intermolecular interactions and in the nanostructures of the chiral cavities of these biopolymers. These results have implications for understanding how the molecular environments of chiral cavities of these polymers affect their molecular recognition mechanisms.
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Affiliation(s)
- Rahul B Kasat
- School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907-2100, USA
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29
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McConnell O, Bach A, Balibar C, Byrne N, Cai Y, Carter G, Chlenov M, Di L, Fan K, Goljer I, He Y, Herold D, Kagan M, Kerns E, Koehn F, Kraml C, Marathias V, Marquez B, McDonald L, Nogle L, Petucci C, Schlingmann G, Tawa G, Tischler M, Williamson RT, Sutherland A, Watts W, Young M, Zhang MY, Zhang Y, Zhou D, Ho D. Enantiomeric separation and determination of absolute stereochemistry of asymmetric molecules in drug discovery—Building chiral technology toolboxes. Chirality 2007; 19:658-82. [PMID: 17390370 DOI: 10.1002/chir.20399] [Citation(s) in RCA: 82] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The application of Chiral Technology, or the (extensive) use of techniques or tools for the determination of absolute stereochemistry and the enantiomeric or chiral separation of racemic small molecule potential lead compounds, has been critical to successfully discovering and developing chiral drugs in the pharmaceutical industry. This has been due to the rapid increase over the past 10-15 years in potential drug candidates containing one or more asymmetric centers. Based on the experiences of one pharmaceutical company, a summary of the establishment of a Chiral Technology toolbox, including the implementation of known tools as well as the design, development, and implementation of new Chiral Technology tools, is provided.
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Affiliation(s)
- Oliver McConnell
- Wyeth Research, Chemical and Screening Sciences, Collegeville, PA 19426, USA.
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