1
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Mo MY, Wang XJ, Shen RZ, Hu CY, Li XC, Li GW, Liu LT. Enantiospecific Analysis of Carboxylic Acids Using Cinchona Alkaloid Dimers as Chiral Solvating Agents. Anal Chem 2024; 96:7487-7496. [PMID: 38695134 DOI: 10.1021/acs.analchem.4c00053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/15/2024]
Abstract
Cinchona alkaloid derivatives as Brønsted base catalysts have attracted considerable attention in the field of asymmetric catalysis. However, their potential application as chiral solvating agents has not been described. In this research, we investigated the use of the Cinchona alkaloid dimer, namely, (DHQ)2PHAL, as a chiral solvating agent for discerning various mandelic acid derivatives through 1H NMR spectroscopy. The addition of catalytic amounts of DMAP facilitated this process. Our experimental results demonstrate that dimeric (DHQ)2PHAL exhibits remarkable chiral discrimination properties regarding the diagnostic split protons of 1H NMR signals (including 24 examples, up to 0.321 ppm). Furthermore, it serves as an excellent chiral discriminating agent and provides good resolution for racemic chiral phosphoric acid as determined by 31P NMR spectroscopy. The quality of enantiodifferentiation has also been evaluated by means of the parameter "resolution (Rs)". Significantly, this class of CSAs based on (alkaloid)2linker systems with an azaaromatic linker can be directly employed, which is commercially available in an enantiopure form at very low cost and exhibits promising potential in determining the enantiopurity of α-hydroxy acids by chemoselective and biocatalytic reactions.
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Affiliation(s)
- Ming-Yang Mo
- School of Chemistry, Zhengzhou University, Zhengzhou, 450001, China
- College of Chemistry and Chemical Engineering, Henan Engineering Research Center for Green Synthesis of Pharmaceuticals, Shangqiu Normal University, Shangqiu 476000, China
| | - Xiao-Juan Wang
- College of Chemistry and Chemical Engineering, Henan Engineering Research Center for Green Synthesis of Pharmaceuticals, Shangqiu Normal University, Shangqiu 476000, China
| | - Ren-Zeng Shen
- College of Chemistry and Chemical Engineering, Henan Engineering Research Center for Green Synthesis of Pharmaceuticals, Shangqiu Normal University, Shangqiu 476000, China
| | - Chang-Yan Hu
- College of Chemistry and Chemical Engineering, Henan Engineering Research Center for Green Synthesis of Pharmaceuticals, Shangqiu Normal University, Shangqiu 476000, China
| | - Xue-Chun Li
- College of Chemistry and Chemical Engineering, Henan Engineering Research Center for Green Synthesis of Pharmaceuticals, Shangqiu Normal University, Shangqiu 476000, China
| | - Gao-Wei Li
- School of Chemistry, Zhengzhou University, Zhengzhou, 450001, China
- College of Chemistry and Chemical Engineering, Henan Engineering Research Center for Green Synthesis of Pharmaceuticals, Shangqiu Normal University, Shangqiu 476000, China
| | - Lan-Tao Liu
- School of Chemistry, Zhengzhou University, Zhengzhou, 450001, China
- College of Chemistry and Chemical Engineering, Henan Engineering Research Center for Green Synthesis of Pharmaceuticals, Shangqiu Normal University, Shangqiu 476000, China
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2
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Scriba GKE. Update on chiral recognition mechanisms in separation science. J Sep Sci 2024; 47:e2400148. [PMID: 38772711 DOI: 10.1002/jssc.202400148] [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: 02/24/2024] [Revised: 04/04/2024] [Accepted: 04/12/2024] [Indexed: 05/23/2024]
Abstract
The stereospecific analysis of chiral molecules is an important issue in many scientific fields. In separation sciences, this is achieved via the formation of transient diastereomeric complexes between a chiral selector and the selectand enantiomers driven by molecular interactions including electrostatic, ion-dipole, dipole-dipole, van der Waals or π-π interactions as well as hydrogen or halogen bonds depending on the nature of selector and selectand. Nuclear magnetic resonance spectroscopy and molecular modeling methods are currently the most frequently applied techniques to understand the selector-selectand interactions at a molecular level and to draw conclusions on the chiral separation mechanism. The present short review summarizes some of the recent achievements for the understanding of the chiral recognition of the most important chiral selectors combining separation techniques with molecular modeling and/or spectroscopic techniques dating between 2020 and early 2024. The selectors include polysaccharide derivatives, cyclodextrins, macrocyclic glycopeptides, proteins, donor-acceptor type selectors, ion-exchangers, crown ethers, and molecular micelles. The application of chiral ionic liquids and chiral deep eutectic solvents, as well as further selectors, are also briefly addressed. A compilation of all published literature on chiral selectors has not been attempted.
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Affiliation(s)
- Gerhard K E Scriba
- Department of Pharmaceutical/Medicinal Chemistry, Friedrich Schiller University, Jena, Germany
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3
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Stadel JT, Back TG. Asymmetric Synthesis with Organoselenium Compounds - The Past Twelve Years. Chemistry 2024; 30:e202304074. [PMID: 38199954 DOI: 10.1002/chem.202304074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 01/09/2024] [Accepted: 01/10/2024] [Indexed: 01/12/2024]
Abstract
The discovery and synthetic applications of novel organoselenium compounds and their reactions proceeded rapidly during the past fifty years and such processes are now carried out routinely in many laboratories. At the same time, the growing demand for new enantioselective processes provided new challenges. The convergence of selenium chemistry and asymmetric synthesis led to key developments in the 1970s, although the majority of early work was based on stoichiometric processes. More recently, greater emphasis has been placed on greener catalytic variations, along with the discovery of novel reactions and a deeper understanding of their mechanisms. The present review covers the literature in this field from 2010 to early 2023 and encompasses asymmetric reactions mediated by chiral selenium-based reagents, auxiliaries, and especially, catalysts. Protocols based on achiral selenium compounds in conjunction with other species of chiral catalysts, as well as reactions that are controlled by chiral substrates, are also included.
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Affiliation(s)
- Jessica T Stadel
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada, T2N 1N4
| | - Thomas G Back
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta, Canada, T2N 1N4
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4
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Yang S, Li X. Vibrational circular dichroism study and gas chromatographic analysis of chiral epichlorohydrin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 303:123237. [PMID: 37598448 DOI: 10.1016/j.saa.2023.123237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/25/2023] [Accepted: 08/03/2023] [Indexed: 08/22/2023]
Abstract
In recent years, there have been numerous incidents of serious accidents related to impurities of optical isomers, particularly in pharmaceutical treatment, environmental problems, and pesticide application. Among these impurities, chiral epichlorohydrin (ECH) is an important C3 synthon and a potentially genotoxic impurity. The enantiopure forms of S-ECH and R-ECH are key raw materials for synthesizing many drugs, which make it important to accurately quantify the specific conformation of chiral epichlorohydrin in pharmaceuticals. In this paper, we achieved the separation of chiral ECH by gas chromatography (GC) and based on the combination of vibrational circular dichroism (VCD) experiments and theoretical calculations, the qualitative method of chiral ECH was achieved without relying on a single enantiomeric standard.
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Affiliation(s)
- Sen Yang
- Department of Chemistry, University of Chinese Academy of Sciences, Beijing, 101408, China.
| | - Xiangjun Li
- Department of Chemistry, University of Chinese Academy of Sciences, Beijing, 101408, China.
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5
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Xu L, Wang Q, Liu Y, Fu S, Zhao Y, Huang S, Huang B. 19F NMR enantiodiscrimination and diastereomeric purity determination of amino acids, dipeptides, and amines. Analyst 2023; 148:4548-4556. [PMID: 37594386 DOI: 10.1039/d3an00761h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
Abstract
Chiral amino-group compounds are of significance for human health, such as biogenic amino acids (AAs), dipeptides, and even various drugs. Enantiospecific discrimination of these chiral compounds is vital in diagnosing diseases, identifying pathological biomarkers and enhancing pharmaceutical chemistry research. Here, we report a simple and rapid 19F NMR-based strategy to differentiate chiral AAs, dipeptides, and amines, that were derivatized with (R)-2-(2-fluorophenyl)-2-hydroxyacetic acid ((R)-2FHA). As a result, 19 proteinogenic AAs (37 isomers) as well as Gly could be concurrently resolved. Moreover, various mirror-image dipeptides, such as Ser-His, Leu-Leu, and Ala-Ala, were commendably recognized. Intriguingly, we found that the absolute configuration of AAs in the N-terminus of dipeptides decided the relative 19F chemical shifts between two enantiomers. Besides, the ability of this method for enantiodiscrimination was further demonstrated by non-AA amines, including aromatic and aliphatic amines, and even amines having chiral centers several carbons away from the amino-group. The structurally similar antibiotics, amoxicillin and ampicillin, were well discriminated. Furthermore, this method accurately determines the de or dr values of non-racemic mixtures. Therefore, our strategy provides an effective approach for 19F NMR-based enantiodiscrimination and diastereomeric purity determination of amino-group compounds.
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Affiliation(s)
- Lihua Xu
- Institute of Drug Discovery Technology, Ningbo University, Ningbo, 315211, P.R. China.
| | - Qiong Wang
- College of Chemistry, Shandong Normal University, Jinan, 250014, P.R. China
| | - Yan Liu
- Department of Chemical Biology, College of Chemistry and Chemical Engineering, and the Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen, 361005, P.R. China
| | - Songsen Fu
- Institute of Drug Discovery Technology, Ningbo University, Ningbo, 315211, P.R. China.
| | - Yufen Zhao
- Institute of Drug Discovery Technology, Ningbo University, Ningbo, 315211, P.R. China.
- Department of Chemical Biology, College of Chemistry and Chemical Engineering, and the Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen, 361005, P.R. China
- Key Lab of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing, 100084, P.R. China
| | - Shaohua Huang
- Institute of Drug Discovery Technology, Ningbo University, Ningbo, 315211, P.R. China.
| | - Biling Huang
- Institute of Drug Discovery Technology, Ningbo University, Ningbo, 315211, P.R. China.
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6
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Yuan S, Zhao L, Wang F, Tan L, Wu D. Recent advances of optically active helical polymers as adsorbents and chiral stationary phases for chiral resolution. J Sep Sci 2023; 46:e2300363. [PMID: 37480172 DOI: 10.1002/jssc.202300363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/02/2023] [Accepted: 07/03/2023] [Indexed: 07/23/2023]
Abstract
Chiral resolution is very important and still a big challenge due to different biological activity and same physicochemical property of one pair (R)- and (S)-isomer. There is no doubt that chiral selectors are essentially needed for chiral resolution, which can stereoselectively interact with a pair of isomers. To date, a large amount of optically active helical polymers as chiral selectors have been synthesized via two strategies. First, the target helical polymers are derived from natural polysaccharide such as cellulose and amylose. Second, they can be synthesized by polymerization of chiral monomers. Alternatively, an achiral polymer is prepared first followed by static or dynamic chiral induction. Furthermore, a part of them is harnessed as chiral stationary phases for chromatographic chiral separation and as chiral adsorbents for enantioselective adsorption/crystallization, resulting in good enantioseparation efficiency. In summary, the present review will focus on recent progress of the polymers with optical activity for chiral resolution, especially the literature published in the past 10 years. In addition, development prospects and future challenges of optically active helical polymers will be discussed in detail.
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Affiliation(s)
- Shuyi Yuan
- Jiangsu Key Laboratory of Advanced Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, P. R. China
| | - Lei Zhao
- Jiangsu Key Laboratory of Advanced Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, P. R. China
| | - Fangqin Wang
- Jiangsu Key Laboratory of Advanced Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, P. R. China
| | - Lilan Tan
- Jiangsu Key Laboratory of Advanced Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, P. R. China
| | - Datong Wu
- Jiangsu Key Laboratory of Advanced Materials and Technology, School of Petrochemical Engineering, Changzhou University, Changzhou, P. R. China
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Japan
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7
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Donahue MG, Crull E. ( R)-(+)-3,5-Dinitro- N-(1-phenylethyl)benzothioamide. MOLBANK 2023; 2023:M1650. [PMID: 38274708 PMCID: PMC10810360 DOI: 10.3390/m1650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2024] Open
Abstract
(R)-(+)-3,5-dinitro-N-(1-phenylethyl)benzothioamide 1 is a potential chiral solvating agent (CSA) for the spectral resolution of enantiomers via 1H NMR spectroscopy. The single enantiomer of 1 was synthesized from commercially available (R)-(+)-a-methylbenzylamine 2 in two steps with 85% yield.
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Affiliation(s)
- Matthew G. Donahue
- Department of Chemistry and Biochemistry, University of Southern Mississippi, Hattiesburg, MS 39406, USA
| | - Emily Crull
- Department of Chemistry and Biochemistry, University of Southern Mississippi, Hattiesburg, MS 39406, USA
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8
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Li L, Luo Y, Jia L. Genetically engineered bacterium-modified magnetic particles assisted chiral recognition and colorimetric determination of D/L-tryptophan in millets. Food Chem 2023; 407:135125. [PMID: 36495743 DOI: 10.1016/j.foodchem.2022.135125] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 11/16/2022] [Accepted: 11/28/2022] [Indexed: 12/04/2022]
Abstract
Chiral recognition of enantiomers has always been a thorny issue since they exhibit the same properties under an achiral environment. Herein, polydopamine-functionalized magnetic particles (MP@PDA) were synthesized to immobilize the genetically engineered bacterium Escherichia coli DH5α (MP@PDA-E. coli). L-tryptophan (Trp) instead of D-Trp can be stereo-specifically degraded by tryptophanase in E. coli. The degradation product indole reacts with 4-dimethylaminobenzaldehyde to generate a rose-red adduct. Thus, MP@PDA-E. coli was employed to fabricate a chiral colorimetric method for chiral recognition and determination of L-Trp. The method averts the purification of tryptophanase. More importantly, tryptophanase demonstrates excellent enantioselective ability for L-Trp. The method can not only quantitatively detect L-Trp but also realize the measurement of the enantiomer percentage in the enantiomeric mixture. The feasibility was verified by detecting L-Trp in millet samples from different origins. Furthermore, a portable device was fabricated to make the method more convenient.
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Affiliation(s)
- Ling Li
- Ministry of Education Key Laboratory of Laser Life Science & Guangdong Provincial Key Laboratory of Laser Life Science & Guangzhou Key Laboratory of Spectral Analysis and Functional Probes, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Yimin Luo
- Ministry of Education Key Laboratory of Laser Life Science & Guangdong Provincial Key Laboratory of Laser Life Science & Guangzhou Key Laboratory of Spectral Analysis and Functional Probes, College of Biophotonics, South China Normal University, Guangzhou 510631, China
| | - Li Jia
- Ministry of Education Key Laboratory of Laser Life Science & Guangdong Provincial Key Laboratory of Laser Life Science & Guangzhou Key Laboratory of Spectral Analysis and Functional Probes, College of Biophotonics, South China Normal University, Guangzhou 510631, China.
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9
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Kwahk EJ, Nguyen NH, Jang S, Shin S, Kim H. Chiral Recognition and Resolution of Phosphoric Acids Using Octahedral Cobalt Complexes. Org Lett 2023; 25:2036-2040. [PMID: 36926952 DOI: 10.1021/acs.orglett.3c00384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
Determining the chirality of phosphoric acids can be a challenging task. In this study, we present a novel approach for the chiral recognition of phosphates using cationic octahedral cobalt complexes. By utilizing 31P NMR spectroscopy, we are able to accurately measure the enantiopurities of chiral phosphoric acids after forming ion pairs with the cobalt complexes. We have successfully applied this method to a variety of chiral phosphoric acids derived from BINOL, H8-BINOL, SPINOL, VAPOL, and VANOL compounds, as well as ATP, and were able to efficiently resolve them in 31P{1H} NMR spectra. Furthermore, we were able to achieve an optical resolution of a phosphoric acid with an enantiomeric excess of greater than 99%.
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Affiliation(s)
- Eun-Jeong Kwahk
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
| | - Nguyen H Nguyen
- Department of Chemistry, Hanyang University, Seoul 04763, Korea
| | - Sumin Jang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
| | - Seunghoon Shin
- Department of Chemistry, Hanyang University, Seoul 04763, Korea
| | - Hyunwoo Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
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10
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Cyclodextrins as chiral selectors in capillary electrophoresis: Recent trends in mechanistic studies. Trends Analyt Chem 2023. [DOI: 10.1016/j.trac.2023.116987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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11
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F-labeled molecular probes for NMR-based detection. J Fluor Chem 2023. [DOI: 10.1016/j.jfluchem.2023.110089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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12
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Feng QY, Tong S, Vatsadze SZ, Wang MX. C-symmetric aza-crown ethers as chiral shift agents for amines and amino acid derivatives. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.133207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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13
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Kulyk S, De Paul SM, Marx MA, Peakman TM, Smith CR. Atropisomeric Racemization Kinetics of MRTX1719 Using Chiral Solvating Agent-Assisted 19F NMR Spectroscopy. ACS OMEGA 2022; 7:32062-32067. [PMID: 36120049 PMCID: PMC9476184 DOI: 10.1021/acsomega.2c03316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 08/15/2022] [Indexed: 06/15/2023]
Abstract
With renewed interest in atropisomerism of drug molecules, efficient methods to experimentally determine torsion rotational energy barriers are needed. Here, we describe use of the chiral phosphoric acid solvating agent (+)-TiPSY to resolve the signals of atropisomers in 19F NMR and to use the data to study the kinetics of racemization and determine the rotational energy barrier of clinical compound MRTX1719. This method is complimentary to traditional chiral high-performance liquid chromatography (HPLC) and enhances the toolkit for chiral analysis techniques.
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Affiliation(s)
- Svitlana Kulyk
- Mirati
Therapeutics, San Diego, California 92121, United States
| | | | - Matthew A. Marx
- Mirati
Therapeutics, San Diego, California 92121, United States
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Balzano F, Iuliano A, Uccello-Barretta G, Zullo V. Renewable Resources for Enantiodiscrimination: Chiral Solvating Agents for NMR Spectroscopy from Isomannide and Isosorbide. J Org Chem 2022; 87:12698-12709. [PMID: 36075050 PMCID: PMC9552179 DOI: 10.1021/acs.joc.2c01244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
A new family of chiral selectors was synthesized in a
single synthetic
step with yields up to 84% starting from isomannide and isosorbide.
Mono- or disubstituted carbamate derivatives were obtained by reacting
the isohexides with electron-donating arylisocyanate (3,5-dimethylphenyl-
or 3,5-dimethoxyphenyl-) and electron-withdrawing arylisocyanate (3,5-bis(trifluoromethyl)phenyl-)
groups to test opposite electronic effects on enantiodifferentiation.
Deeper chiral pockets and derivatives with more acidic protons were
obtained by derivatization with 1-naphthylisocyanate and p-toluenesulfonylisocyanate, respectively. All compounds were
tested as chiral solvating agents (CSAs) in 1H NMR experiments
with rac-N-3,5-dinitrobenzoylphenylglycine
methyl ester in order to determine the influence of different structural
features on the enantiodiscrimination capabilities. Some selected
compounds were tested with other racemic analytes, still leading to
enantiodiscrimination. The enantiodiscrimination conditions were then
optimized for the best CSA/analyte couple. Finally, a 2D- and 1D-NMR
study was performed employing the best performing CSA with the two
enantiomers of the selected analyte, aiming to determine the enantiodiscrimination
mechanism, the stoichiometry of interaction, and the complexation
constant.
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Affiliation(s)
- Federica Balzano
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Giuseppe Moruzzi, 13, 56124 Pisa, Italy
| | - Anna Iuliano
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Giuseppe Moruzzi, 13, 56124 Pisa, Italy
| | - Gloria Uccello-Barretta
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Giuseppe Moruzzi, 13, 56124 Pisa, Italy
| | - Valerio Zullo
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Giuseppe Moruzzi, 13, 56124 Pisa, Italy
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15
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Recchimurzo A, Balzano F, Uccello Barretta G, Gherardi L. Bis-Thiourea Chiral Sensor for the NMR Enantiodiscrimination of N-Acetyl and N-Trifluoroacetyl Amino Acid Derivatives. J Org Chem 2022; 87:11968-11978. [PMID: 36062357 PMCID: PMC9486950 DOI: 10.1021/acs.joc.2c00814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
A C2-symmetrical bis-thiourea chiral solvating agent
(CSA), TFTDA, for NMR spectroscopy has been obtained
by reacting
(1R,2R)-1,2-bis(2-hydroxyphenyl)ethylenediamine
and 3,5-bis(trifluoromethyl)phenyl isothiocyanate. TFTDA shows remarkable propensity to enantiodiscriminate N-trifluoroacetyl (N-TFA) and N-acetyl
(N-Ac) derivatives of amino acids with free carboxyl
functions, with the co-presence of 1,4-diazabicyclo[2.2.2]octane (DABCO)
as the third achiral additive, which is needed for substrate solubilization. TFTDA shows enhanced enantiodiscriminating efficiency in comparison
with the corresponding monomeric counterpart, TFTMA,
pointing out cooperativity between its two symmetrical entities. A
wide range of amino acid derivatives have been efficiently enantiodiscriminated
in CDCl3, with high enantioresolution quotients, which
guarantee high quality in applications devoted to the quantification
of enantiomers. High enantiodiscriminating efficiency is maintained
also in diluted 5 mM conditions or in the presence of sub-stoichiometric
amounts of CSA (0.3 equiv). The role of phenolic hydroxyls in the
DABCO-mediated interaction mechanism between TFTDA and
the two enantiomeric substrates has been pointed out by means of diffusion-ordered
spectroscopy (DOSY) and rotating frame Overhauser effect spectroscopy
(ROESY) experiments. A conformational model for both the CSA and its
diastereomeric solvates formed with the two enantiomers of N-acetyl leucine has also been conceived on the basis of
ROE data in order to give a chiral discrimination rationale.
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Affiliation(s)
- Alessandra Recchimurzo
- Department of Chemistry and Industrial Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy
| | - Federica Balzano
- Department of Chemistry and Industrial Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy
| | - Gloria Uccello Barretta
- Department of Chemistry and Industrial Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy
| | - Luca Gherardi
- Department of Chemistry and Industrial Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy
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16
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Peluso P, Chankvetadze B. Recognition in the Domain of Molecular Chirality: From Noncovalent Interactions to Separation of Enantiomers. Chem Rev 2022; 122:13235-13400. [PMID: 35917234 DOI: 10.1021/acs.chemrev.1c00846] [Citation(s) in RCA: 57] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
It is not a coincidence that both chirality and noncovalent interactions are ubiquitous in nature and synthetic molecular systems. Noncovalent interactivity between chiral molecules underlies enantioselective recognition as a fundamental phenomenon regulating life and human activities. Thus, noncovalent interactions represent the narrative thread of a fascinating story which goes across several disciplines of medical, chemical, physical, biological, and other natural sciences. This review has been conceived with the awareness that a modern attitude toward molecular chirality and its consequences needs to be founded on multidisciplinary approaches to disclose the molecular basis of essential enantioselective phenomena in the domain of chemical, physical, and life sciences. With the primary aim of discussing this topic in an integrated way, a comprehensive pool of rational and systematic multidisciplinary information is provided, which concerns the fundamentals of chirality, a description of noncovalent interactions, and their implications in enantioselective processes occurring in different contexts. A specific focus is devoted to enantioselection in chromatography and electromigration techniques because of their unique feature as "multistep" processes. A second motivation for writing this review is to make a clear statement about the state of the art, the tools we have at our disposal, and what is still missing to fully understand the mechanisms underlying enantioselective recognition.
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Affiliation(s)
- Paola Peluso
- Istituto di Chimica Biomolecolare ICB, CNR, Sede secondaria di Sassari, Traversa La Crucca 3, Regione Baldinca, Li Punti, I-07100 Sassari, Italy
| | - Bezhan Chankvetadze
- Institute of Physical and Analytical Chemistry, School of Exact and Natural Sciences, Tbilisi State University, Chavchavadze Avenue 3, 0179 Tbilisi, Georgia
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17
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K S N, Kumar TN, Reddy Singam SS, Chaudhari SR. Selective Homodecoupled 1D- 1H NMR Experiment for Unravelling Enantiomers. Anal Chem 2022; 94:10299-10303. [PMID: 35834712 DOI: 10.1021/acs.analchem.2c01020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
1H NMR spectroscopy is a quick and easy tool to resolve enantiomers. However, the paradigm of resolution of enantiomers by 1H NMR is a difficult task due to the minor chemical shift differences and overlap of the resonances of the enantiomers. In the current study, we have performed the conventional selective homodecoupling 1D-1H NMR experiment to achieve chiral resolutions. The predominant features of the proposed methods are (a) high sensitivity as opposed to routinely employed pure shift NMR experiments, (b) easy optimization like conventional 1D-1H NMR, and (c) an artifact-free spectrum. The application of the method has been exhibited in the measurement of proton chemical shift differences between diastereomers and enantiomer excess (ee). The broad use of the proposed method was demonstrated by employing the six samples utilizing the chiral solvating and derivatizing agents.
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Affiliation(s)
- Naresh K S
- Department of Spice and Flavour Science, CSIR - Central Food Technological Research Institute, Mysuru, Karnataka 570020, India.,AcSIR - Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh 201002, India
| | - Theerthan N Kumar
- Department of Spice and Flavour Science, CSIR - Central Food Technological Research Institute, Mysuru, Karnataka 570020, India
| | - Siva Sankara Reddy Singam
- Department of Food Safety and Analytical Quality Control Laboratory, CSIR - Central Food Technological Research Institute, Mysuru, Karnataka 570020, India.,AcSIR - Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh 201002, India
| | - Sachin R Chaudhari
- Department of Spice and Flavour Science, CSIR - Central Food Technological Research Institute, Mysuru, Karnataka 570020, India.,AcSIR - Academy of Scientific and Innovative Research, Ghaziabad, Uttar Pradesh 201002, India
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18
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Norvaiša K, O'Brien JE, Osadchuk I, Twamley B, Borovkov V, Senge MO. Importance of molecular symmetry for enantiomeric excess recognition by NMR. Chem Commun (Camb) 2022; 58:5423-5426. [PMID: 35416216 DOI: 10.1039/d2cc01319c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recently prochiral solvating agents (pro-CSA) came under the spotlight for the detection of enantiopurity by NMR. Chemical shift non-equivalency in achiral hosts introduced by the presence of chiral guests yields observable resonance signal splitting (Δδ) correlating to the enantiomeric excess (e.e.). In this work, symmetry is our lens to explain porphyrin-based supramolecular receptor activity in a chiral environment. Based on extensive NMR analyses of the atropisomeric receptors, the host symmetry is shown to be affected by porphyrin nonplanarity and further desymmetrized in the presence of a chiral guest. As such, the exposed porphyrin inner core (N-H), with its strong hydrogen bond abilities, for the first time, has been exploited in enantiomeric composition analysis. Our approach in e.e. detection by N-H signals appearing in a previously underutilized region of the spectrum (below 0 ppm) shows chemical shift splitting (Δδ) three times more sensitive to enantiomeric compositions than previously reported systems.
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Affiliation(s)
- Karolis Norvaiša
- School of Chemistry, Chair of Organic Chemistry, Trinity Biomedical Sciences Institute, 152-160 Pearse Street, Trinity College Dublin, The University of Dublin, Dublin 2, Ireland
| | - John E O'Brien
- School of Chemistry, Trinity College Dublin, The University of Dublin, Dublin 2, Ireland
| | - Irina Osadchuk
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, Tallinn 12618, Estonia
| | - Brendan Twamley
- School of Chemistry, Trinity College Dublin, The University of Dublin, Dublin 2, Ireland
| | - Victor Borovkov
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, Tallinn 12618, Estonia
| | - Mathias O Senge
- School of Chemistry, Chair of Organic Chemistry, Trinity Biomedical Sciences Institute, 152-160 Pearse Street, Trinity College Dublin, The University of Dublin, Dublin 2, Ireland.,Institute for Advanced Study (TUM-IAS) Technical University of Munich, Focus Group - Molecular and Interfacial Engineering of Organic Nanosystems, Lichtenbergstrasse 2a, D-85748 Garching, Germany.
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19
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Recchimurzo A, Maccabruni F, Uccello Barretta G, Balzano F. Quinine as a highly responsive chiral sensor for the 1H and 19F NMR enantiodiscrimination of N-trifluoroacetyl amino acids with free carboxyl functions. Analyst 2022; 147:1669-1677. [PMID: 35315472 DOI: 10.1039/d2an00166g] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Hydrogen-bond accepting and enantiodiscriminating abilities of quinine (Qui) have been exploited in the enantiodiscrimination of N-trifluoroacetyl (TFA) derivatives of amino acids by nuclear magnetic resonance (NMR) spectroscopy. 1H and 19F NMR resonances of derivatives of alanine, valine, leucine, norvaline, phenylalanine, phenylglycine, methionine, glutamic acid, proline, and tryptophan were well differentiated employing CDCl3 and/or C6D6 as solvent, with Qui acting in some cases not only as enantiodiscriminating agent, but also as solubility promoter. For derivatives soluble in both solvents, the best results were obtained in benzene-d6, with very high nonequivalence values, which were detectable not only starting from very low equimolar concentrations of 0.1 mM, but also in the presence of sub-stoichiometric amounts of Qui. The quality of enantiodifferentiation has been also evaluated by means of the enantioresolution quotient E. The method has been applied to the detection and quantification of mixtures of amino acid derivatives by single point measurements.
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Affiliation(s)
- Alessandra Recchimurzo
- Department of Chemistry and Industrial Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy.
| | - Fabio Maccabruni
- Department of Chemistry and Industrial Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy.
| | - Gloria Uccello Barretta
- Department of Chemistry and Industrial Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy.
| | - Federica Balzano
- Department of Chemistry and Industrial Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy.
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20
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Assignment-free chirality detection in unknown samples via microwave three-wave mixing. Commun Chem 2022; 5:31. [PMID: 36697786 PMCID: PMC9814651 DOI: 10.1038/s42004-022-00641-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 02/03/2022] [Indexed: 01/28/2023] Open
Abstract
Straightforward identification of chiral molecules in multi-component mixtures of unknown composition is extremely challenging. Current spectrometric and chromatographic methods cannot unambiguously identify components while the state of the art spectroscopic methods are limited by the difficult and time-consuming task of spectral assignment. Here, we introduce a highly sensitive generalized version of microwave three-wave mixing that uses broad-spectrum fields to detect chiral molecules in enantiomeric excess without any prior chemical knowledge of the sample. This method does not require spectral assignment as a necessary step to extract information out of a spectrum. We demonstrate our method by recording three-wave mixing spectra of multi-component samples that provide direct evidence of enantiomeric excess. Our method opens up new capabilities in ultrasensitive phase-coherent spectroscopic detection that can be applied for chiral detection in real-life mixtures, raw products of chemical reactions and difficult to assign novel exotic species.
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21
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Huang B, Xu L, Wang N, Ying J, Zhao Y, Huang S. trans-4-Fluoro-l-proline: A Sensitive 19F NMR Probe for the Rapid Simultaneous Enantiomeric Analysis of Multicomponent Amines. Anal Chem 2022; 94:1867-1873. [PMID: 35025215 DOI: 10.1021/acs.analchem.1c04823] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Simultaneous enantiomeric analysis is especially important for medicine, food security, and life science. Chiral analysis of multicomponent amine mixtures still faces many challenges. Here, our work demonstrates for the first time that a novel chiral derivatizing agent CDApro based on trans-4-fluoro-l-proline (trans4Fpro) has been successfully used for the rapid simultaneous analysis of 22 chiral nonamino acid (non-AA) amines, multicomponent l/d-AAs, or mirror-image dipeptides in a mixture, as well as amines with chiral centers several carbons remote to the amino group. Furthermore, determination of enantiomeric purity and quantification of chiral amines can be made using CDApro, which serves as a robust and powerful reagent for the differentiation of multicomponent chiral amines.
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Affiliation(s)
- Biling Huang
- Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, P.R. China.,Qian Xuesen Collaborative Research Center of Astrochemistry and Space Life Sciences, Ningbo University, Ningbo 315211, P.R. China
| | - Lihua Xu
- Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, P.R. China
| | - Ning Wang
- Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, P.R. China.,Qian Xuesen Collaborative Research Center of Astrochemistry and Space Life Sciences, Ningbo University, Ningbo 315211, P.R. China
| | - Jianxi Ying
- Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, P.R. China.,Qian Xuesen Collaborative Research Center of Astrochemistry and Space Life Sciences, Ningbo University, Ningbo 315211, P.R. China
| | - Yufen Zhao
- Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, P.R. China.,Qian Xuesen Collaborative Research Center of Astrochemistry and Space Life Sciences, Ningbo University, Ningbo 315211, P.R. China.,Department of Chemical Biology, College of Chemistry and Chemical Engineering, and the Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen 361005, P.R. China.,Key Lab of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China
| | - Shaohua Huang
- Institute of Drug Discovery Technology, Ningbo University, Ningbo 315211, P.R. China.,Qian Xuesen Collaborative Research Center of Astrochemistry and Space Life Sciences, Ningbo University, Ningbo 315211, P.R. China
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22
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Ge R, Zhu Y, Wang H, Gu S. Methods and Application of Absolute Configuration Assignment for Chiral Compounds. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202108047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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23
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Complexation of daclatasvir by single isomer methylated β-cyclodextrins studied by capillary electrophoresis, NMR spectroscopy and mass spectrometry. Carbohydr Polym 2021; 273:118486. [PMID: 34560933 DOI: 10.1016/j.carbpol.2021.118486] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 07/06/2021] [Accepted: 07/22/2021] [Indexed: 11/23/2022]
Abstract
In capillary electrophoresis an enantioseparation of daclatasvir (DCV) was observed in case of heptakis(2,6-di-O-methyl)-β-CD, heptakis(2-O-methyl)-β-CD and β-CD, while two peaks with a plateau were noted for heptakis(2,3,6-tri-O-methyl)-β-CD and heptakis(2,3-di-O-methyl)-β-CD indicating a slow equilibrium. Heptakis(6-O-methyl)-β-CD and heptakis(3-O-methyl)-β-CD yielded broad peaks. Nuclear magnetic resonance experiments including nuclear Overhauser effect-based techniques revealed inclusion complex formation for all CDs with the biphenyl ring of DCV within the cavity and the valine-pyrrolidine moieties protruding from the torus. However, in case of heptakis(2,6-di-O-methyl)-β-CD, heptakis(2-O-methyl)-β-CD and β-CD higher order structures with 1:3 stoichiometry were concluded, where the valine moieties enter additional CD molecules via the secondary side. Heptakis(2,3,6-tri-O-methyl)-β-CD and heptakis(2,3-di-O-methyl)-β-CD yielded primarily 1:1 complexes. Higher order complexes between DCV and heptakis(2,6-di-O-methyl)-β-CD were corroborated by mass spectrometry. Complex stoichiometry was not the reason for the slow equilibrium yielding the plateau observed in capillary electrophoresis, but structural characteristics of the CDs especially complete methylation of the secondary rim.
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24
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Lankhorst PP, Duchateau ALL, Netscher T. Discrimination of stereoisomers by one-dimensional 13 C NMR: All 16 stereoisomers of 4-hydroxy-α-tocopherol resolved. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2021; 59:1146-1153. [PMID: 34380173 DOI: 10.1002/mrc.5202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 08/04/2021] [Accepted: 08/08/2021] [Indexed: 06/13/2023]
Abstract
All 16 resolved! A vitamin E-derived compound containing four chiral centers is the first example where all stereoisomers, that is, eight diastereomeric pairs of enantiomers, could be discriminated in a single NMR run. Measurement at 176 MHz in the presence of Pirkle's alcohol as a chiral solvating agent is a relatively robust, simple, easy-to-set-up, and fast method.
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Affiliation(s)
| | | | - Thomas Netscher
- DSM Nutritional Products, Research and Development, Basel, Switzerland
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25
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Kwahk EJ, Jang S, Kim H. Chiral Recognition of In Situ-Oxidized Phosphine Oxides with Octahedral Indium Complexes by 31P NMR Spectroscopy. Org Lett 2021; 23:7829-7833. [PMID: 34559535 DOI: 10.1021/acs.orglett.1c02847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein, efficient chiral recognition of phosphine oxides with octahedral indium complexes was demonstrated. Direct chiral analysis of in situ-prepared phosphine oxides formed using phosphines and hydrogen peroxide was conducted effectively via 31P nuclear magnetic resonance spectroscopy. Sufficient peak resolution of chiral phosphines was obtained consistently, thereby enabling the reliable determination of absolute chirality. Rational 1:1 binding models based on experiments and density functional theory calculations have been proposed.
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Affiliation(s)
- Eun-Jeong Kwahk
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
| | - Sumin Jang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
| | - Hyunwoo Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
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26
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Chen L, Liu M, Yang S, Zhao H, Yao X, Li X, Meng J. Theoretical electronic circular dichroism investigations of chiral amino acids and development of separation and identification methods independent of standards. J Chromatogr A 2021; 1654:462446. [PMID: 34384924 DOI: 10.1016/j.chroma.2021.462446] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 07/13/2021] [Accepted: 07/26/2021] [Indexed: 02/07/2023]
Abstract
Through an appropriate computational protocol and environmental simulation, a satisfactory fit was observed for the theoretical electronic circular dichroism (ECD) spectra of 19 chiral amino acids (AAs), which correspondeds to the forms of the AAs in aqueous solution. Methods for enantioseparation of these chiral AAs by capillary electrophoresis (CE) and high-performance liquid chromatography (HPLC) were developed. Combining ECD with chromatographic separation methods, enantiomers were identified and quantified independent of a single enantiomer standard.
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Affiliation(s)
- Lixia Chen
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Mingxia Liu
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Sen Yang
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Hong Zhao
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xin Yao
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiangjun Li
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Jinghua Meng
- Department of Mathematics, Xinzhou Teachers University, Xinzhou, Shanxi 034000, China
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27
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Iarocz LEB, Silva MS. Nuclear magnetic resonance chiral discrimination of fipronil and malathion agrochemicals: A case study. Chirality 2021; 33:528-534. [PMID: 34184332 DOI: 10.1002/chir.23336] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Revised: 06/15/2021] [Accepted: 06/18/2021] [Indexed: 11/12/2022]
Abstract
The aim of the present study was to optimize a protocol for nuclear magnetic resonance (NMR) chiral discrimination to be used to determine the enantiomers ratio of agrochemicals. For this goal, the commercial agrochemicals fipronil and malathion were employed as active targets due the distinct physicochemical properties. We used the cyclodextrins to evaluate the chiral discrimination in aqueous media and chiral solvent agents to check in organic media. The fipronil chiral discrimination was accessed by β-CD in aqueous solution, although this procedure was ineffective for malathion due the low solubility. In organic media, the NMR chiral discrimination was successful for both agrochemicals and sensitive to dilution process. The NMR experiments explore very sensitive nuclei, for instance 1 H, 19 F, and 31 P, in a simple, practical and low residue experimental protocol.
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Affiliation(s)
- Lucas E B Iarocz
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas-UFPel, Capão do Leão, Brazil
| | - Márcio S Silva
- Centro de Ciências Químicas, Farmacêuticas e de Alimentos, Universidade Federal de Pelotas-UFPel, Capão do Leão, Brazil
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28
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Recchimurzo A, Micheletti C, Uccello-Barretta G, Balzano F. A Dimeric Thiourea CSA for the Enantiodiscrimination of Amino Acid Derivatives by NMR Spectroscopy. J Org Chem 2021; 86:7381-7389. [PMID: 34019407 PMCID: PMC8279476 DOI: 10.1021/acs.joc.1c00340] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Indexed: 01/19/2023]
Abstract
The reaction of benzoyl isothiocyanate with (1R,2R)-1,2-bis(2-hydroxyphenyl)ethylenediamine afforded a new thiourea chiral solvating agent (CSA) with a very high ability to differentiate 1H and 13C NMR signals of simple amino acid derivatives, even at low concentrations. The enantiodiscrimination efficiency was higher with respect to that of the parent monomer, a thiourea derivative of 2-((1R)-1-aminoethyl)phenol, thus putting into light the relevance of the cooperativity between the two molecular portions of the dimer in a cleft conformation stabilized by interchain hydrogen bond interactions. An achiral base additive (DABCO or DMAP) played an active role in the chiral discrimination processes, mediating the interaction between the CSA and the enantiomeric mixtures. The chiral discrimination mechanism was investigated by NMR spectroscopy through the determination of complexation stoichiometries, association constants, and the stereochemistry of the diastereomeric solvates.
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Affiliation(s)
| | | | - Gloria Uccello-Barretta
- Department of Chemistry and
Industrial Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy
| | - Federica Balzano
- Department of Chemistry and
Industrial Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy
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29
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Wang T, Cook I, Leyh TS. The molecular basis of OH-PCB estrogen receptor activation. J Biol Chem 2021; 296:100353. [PMID: 33524392 PMCID: PMC7949139 DOI: 10.1016/j.jbc.2021.100353] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 01/25/2021] [Accepted: 01/27/2021] [Indexed: 11/16/2022] Open
Abstract
Polychlorinated bisphenols (PCBs) continue to contaminate food chains globally where they concentrate in tissues and disrupt the endocrine systems of species throughout the ecosphere. Hydroxylated PCBs (OH-PCBs) are major PCB metabolites and high-affinity inhibitors of human estrogen sulfotransferase (SULT1E1), which sulfonates estrogens and thus prevents them from binding to and activating their receptors. OH-PCB inhibition of SULT1E1 is believed to contribute significantly to PCB-based endocrine disruption. Here, for the first time, the molecular basis of OH-PCB inhibition of SULT1E1 is revealed in a structure of SULT1E1 in complex with OH-PCB1 (4ʹ-OH-2,6-dichlorobiphenol) and its substrates, estradiol (E2), and PAP (3’-phosphoadenosine-5-phosphosulfate). OH-PCB1 prevents catalysis by intercalating between E2 and catalytic residues and establishes a new E2-binding site whose E2 affinity and positioning are greater than and competitive with those of the reactive-binding pocket. Such complexes have not been observed previously and offer a novel template for the design of high-affinity inhibitors. Mutating residues in direct contact with OH-PCB weaken its affinity without compromising the enzyme’s catalytic parameters. These OH-PCB resistant mutants were used in stable transfectant studies to demonstrate that OH-PCBs regulate estrogen receptors in cultured human cell lines by binding the OH-PCB binding pocket of SULT1E1.
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Affiliation(s)
- Ting Wang
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Ian Cook
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Thomas S Leyh
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, New York, USA.
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30
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Buhse T, Cruz JM, Noble-Terán ME, Hochberg D, Ribó JM, Crusats J, Micheau JC. Spontaneous Deracemizations. Chem Rev 2021; 121:2147-2229. [DOI: 10.1021/acs.chemrev.0c00819] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Thomas Buhse
- Centro de Investigaciones Químicas−IICBA, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, 62209 Cuernavaca, Morelos Mexico
| | - José-Manuel Cruz
- Facultad de Ciencias en Física y Matemáticas, Universidad Autónoma de Chiapas, Tuxtla Gutiérrez, Chiapas 29050, Mexico
| | - María E. Noble-Terán
- Centro de Investigaciones Químicas−IICBA, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, 62209 Cuernavaca, Morelos Mexico
| | - David Hochberg
- Department of Molecular Evolution, Centro de Astrobiología (CSIC-INTA), Carretera Ajalvir, Km. 4, 28850 Torrejón de Ardoz, Madrid Spain
| | - Josep M. Ribó
- Institut de Ciències del Cosmos (IEEC-ICC) and Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Catalunya Spain
| | - Joaquim Crusats
- Institut de Ciències del Cosmos (IEEC-ICC) and Departament de Química Inorgànica i Orgànica, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Catalunya Spain
| | - Jean-Claude Micheau
- Laboratoire des IMRCP, UMR au CNRS No. 5623, Université Paul Sabatier, F-31062 Toulouse Cedex, France
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31
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Krait S, Konjaria ML, Scriba GKE. Advances of capillary electrophoresis enantioseparations in pharmaceutical analysis (2017-2020). Electrophoresis 2021; 42:1709-1725. [PMID: 33433919 DOI: 10.1002/elps.202000359] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 01/04/2021] [Accepted: 01/04/2021] [Indexed: 02/06/2023]
Abstract
Capillary electrophoresis is a powerful technique for the analysis of polar chiral compounds and has been widely accepted for analytical enantioseparations of drug compounds in pharmaceuticals and biological media. In addition, many mechanistic studies have been conducted in an attempt to rationalize enantioseparations in combination with spectroscopic and computational techniques. The present review will focus on recent examples of mechanistic aspects and summarize recent applications of stereoselective pharmaceutical and biomedical analysis published between January 2017 and November 2020. Various separation modes including electrokinetic chromatography in combination with several detection modes including laser-induced fluorescence, mass spectrometry and contactless conductivity detection will be discussed. A general trend also observed in other analytical techniques is the application of quality by design principles in method development and optimization.
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Affiliation(s)
- Sulaiman Krait
- Department of Pharmaceutical/Medicinal Chemistry, Philosophenweg 14, Friedrich Schiller University, Jena, Germany
| | - Mari-Luiza Konjaria
- Department of Pharmaceutical/Medicinal Chemistry, Philosophenweg 14, Friedrich Schiller University, Jena, Germany
| | - Gerhard K E Scriba
- Department of Pharmaceutical/Medicinal Chemistry, Philosophenweg 14, Friedrich Schiller University, Jena, Germany
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32
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Maistrenko VN, Zil’berg RA. Enantioselective Voltammetric Sensors on the Basis of Chiral Materials. JOURNAL OF ANALYTICAL CHEMISTRY 2020. [DOI: 10.1134/s1061934820120102] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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33
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Lima YR, Da Costa GP, Xavier MCDF, De Moraes MC, Barcellos T, Alves D, Silva MS. Synthesis of
α
‐Hydroxyphosphonates Containing Functionalized 1,2,3‐Triazoles. ChemistrySelect 2020. [DOI: 10.1002/slct.202003761] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yanka R. Lima
- Laboratório de Síntese Orgânica Limpa - LASOL CCQFA Universidade Federal de Pelotas - UFPel P. O. Box 354 96010-900 Pelotas RS Brazil (MSS
| | - Gabriel P. Da Costa
- Laboratório de Síntese Orgânica Limpa - LASOL CCQFA Universidade Federal de Pelotas - UFPel P. O. Box 354 96010-900 Pelotas RS Brazil (MSS
| | - Maurício C. D. F. Xavier
- Laboratório de Síntese Orgânica Limpa - LASOL CCQFA Universidade Federal de Pelotas - UFPel P. O. Box 354 96010-900 Pelotas RS Brazil (MSS
| | - Maiara C. De Moraes
- Laboratório de Biotecnologia de Produtos Naturais e Sintéticos Universidade de Caxias do Sul - UCS Caxias do Sul RS Brazil
| | - Thiago Barcellos
- Laboratório de Biotecnologia de Produtos Naturais e Sintéticos Universidade de Caxias do Sul - UCS Caxias do Sul RS Brazil
| | - Diego Alves
- Laboratório de Síntese Orgânica Limpa - LASOL CCQFA Universidade Federal de Pelotas - UFPel P. O. Box 354 96010-900 Pelotas RS Brazil (MSS
| | - Márcio S. Silva
- Laboratório de Síntese Orgânica Limpa - LASOL CCQFA Universidade Federal de Pelotas - UFPel P. O. Box 354 96010-900 Pelotas RS Brazil (MSS
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34
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Inclusion complexes of tricyclic drugs and β-cyclodextrin: Inherent chirality and dynamic behaviour. Int J Pharm 2020; 588:119775. [PMID: 32805385 DOI: 10.1016/j.ijpharm.2020.119775] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2020] [Revised: 08/12/2020] [Accepted: 08/13/2020] [Indexed: 11/21/2022]
Abstract
Amitriptyline (AMT) and cyclobenzaprine (CBZ) are tricyclic drugs used as antidepressant and muscle relaxant, respectively. They show inherently chirality, i.e. they are chiral due to the lack of any symmetry element. As they are used as racemic mixture, diastereomeric inclusion complexes are formed via encapsulation in homochiral βCD. In this work we show that a suitable combination of NMR methods easily provides details on the chiral recognition, geometry of complexation, rotational dynamics and spatial proximity of selected atom pairs. In particular, we show that 13C NMR can be used to unambiguously assess chiral recognition, demonstrating a higher performance over 1H NMR. The mole fraction of the bound drug and the association constant can be worked out through diffusion experiments, whereas the combination of non-selective, selective and bi-selective relaxation spectra gave insights into the rotational motion of the complexed drug and the spatial proximity of selected proton pairs. The toolkit here proposed provides a thorough characterization of CD/drug inclusion complexes from a physicochemical point of view. This can constructively complement the conventional pharmacological and pharmacokinetic experiments, and can shed light on the understanding of CD/drug formulations.
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Krait S, Salgado A, Villani C, Naumann L, Neusüß C, Chankvetadze B, Scriba GK. Unusual complexation behavior between daclatasvir and γ-Cyclodextrin. A multiplatform study. J Chromatogr A 2020; 1628:461448. [DOI: 10.1016/j.chroma.2020.461448] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 07/30/2020] [Accepted: 08/01/2020] [Indexed: 12/14/2022]
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37
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Raval HB, Bedekar AV. Synthesis And Study of Fluorine Containing Kagan's Amides as Chiral Solvating Agents For Enantiodiscrimination of Acids by NMR Spectroscopy. ChemistrySelect 2020. [DOI: 10.1002/slct.202000779] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Hiten B. Raval
- Department of Chemistry Faculty of Science, The MaharajaSayajirao University of Baroda Vadodara 390 002 India
| | - Ashutosh V. Bedekar
- Department of Chemistry Faculty of Science, The MaharajaSayajirao University of Baroda Vadodara 390 002 India
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38
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Hiller NDJ, do Amaral e Silva NA, Tavares TA, Faria RX, Eberlin MN, de Luna Martins D. Arylboronic Acids and their Myriad of Applications Beyond Organic Synthesis. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000396] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Noemi de Jesus Hiller
- Instituto de Química; Laboratório de Catálise e Síntese (Lab CSI); Laboratório 413; Universidade Federal Fluminense; Outeiro de São João Batista s/n; Campus do Valonguinho, Centro Niterói RJ 24020-141 Brasil
| | - Nayane Abreu do Amaral e Silva
- Instituto de Química; Laboratório de Catálise e Síntese (Lab CSI); Laboratório 413; Universidade Federal Fluminense; Outeiro de São João Batista s/n; Campus do Valonguinho, Centro Niterói RJ 24020-141 Brasil
| | - Thais Apolinário Tavares
- Instituto de Química; Laboratório de Catálise e Síntese (Lab CSI); Laboratório 413; Universidade Federal Fluminense; Outeiro de São João Batista s/n; Campus do Valonguinho, Centro Niterói RJ 24020-141 Brasil
| | - Robson Xavier Faria
- Laboratório de Toxoplasmose e outras Protozooses; Instituto Oswaldo Cruz, Fiocruz; Av. Brasil, 4365 Manguinhos Rio de Janeiro RJ 21040-360 Brasil
| | - Marcos Nogueira Eberlin
- Mackenzie Presbyterian University; School of Engineering; Rua da Consolação, 930 SP 01302-907 São Paulo Brasil
| | - Daniela de Luna Martins
- Instituto de Química; Laboratório de Catálise e Síntese (Lab CSI); Laboratório 413; Universidade Federal Fluminense; Outeiro de São João Batista s/n; Campus do Valonguinho, Centro Niterói RJ 24020-141 Brasil
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39
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Li G, Ma M, Wang G, Wang X, Lei X. Efficient Enantiodifferentiation of Carboxylic Acids Using BINOL-Based Amino Alcohol as a Chiral NMR Solvating Agent. Front Chem 2020; 8:336. [PMID: 32432082 PMCID: PMC7213237 DOI: 10.3389/fchem.2020.00336] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 04/01/2020] [Indexed: 12/30/2022] Open
Abstract
A new optically active BINOL-amino alcohol has been designed and synthesized in a good yield and applied as chiral nuclear magnetic resonance (NMR) solvating agent for enantioselective recognition. Analysis by 1H NMR spectroscopy demonstrated that it has excellent enantiodifferentiation properties toward carboxylic acids and non-steroidal anti-inflammatory drugs (14 examples). The non-equivalent chemical shifts (up to 0.641 ppm) of various mandelic acids were evaluated by the reliable peak of well-resolved 1H NMR signals. In addition, enantiomeric excesses of the ortho-chloro-mandelic acid with different enantiomeric ratio were calculated based on integration of proton well-separated splitting signals.
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Affiliation(s)
- Gaowei Li
- College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu, China
| | - Minshan Ma
- School of Pharmaceutical Sciences, South Central University for Nationalities, Wuhan, China
| | - Guifang Wang
- School of Pharmaceutical Sciences, South Central University for Nationalities, Wuhan, China
| | - Xiaojuan Wang
- College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu, China
| | - Xinxiang Lei
- School of Pharmaceutical Sciences, South Central University for Nationalities, Wuhan, China
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40
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Recchimurzo A, Micheletti C, Uccello-Barretta G, Balzano F. Thiourea Derivative of 2-[(1 R)-1-Aminoethyl]phenol: A Flexible Pocket-like Chiral Solvating Agent (CSA) for the Enantiodifferentiation of Amino Acid Derivatives by NMR Spectroscopy. J Org Chem 2020; 85:5342-5350. [PMID: 32191037 PMCID: PMC7997569 DOI: 10.1021/acs.joc.0c00027] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Indexed: 12/12/2022]
Abstract
Thiourea derivatives of 2-[(1R)-1-aminoethyl]phenol, (1S,2R)-1-amino-2,3-dihydro-1H-inden-2-ol, (1R,2R)-(1S,2R)-1-amino-2,3-dihydro-1H-inden-2-ol, and (R)-1-phenylethanamine have been compared as chiral solvating agents (CSAs) for the enantiodiscrimination of derivatized amino acids using nuclear magnetic resonance (NMR) spectroscopy. Thiourea derivative, prepared by reacting 2-[(1R)-1-aminoethyl]phenol with benzoyl isothiocyanate, constitutes an effective CSA for the enantiodiscrimination of N-3,5-dinitrobenzoyl (DNB) derivatives of amino acids with free or derivatized carboxyl functions. A base additive 1,4-diazabicyclo[2.2.2]octane(DABCO)/N,N-dimethylpyridin-4-amine (DMAP)/NBu4OH) is required both to solubilize amino acid derivatives with free carboxyl groups in CDCl3 and to mediate their interaction with the chiral auxiliary to attain efficient differentiation of the NMR signals of enantiomeric substrates. For ternary systems CSA/substrate/DABCO, the chiral discrimination mechanism has been ascertained through the NMR determination of complexation stoichiometry, association constants, and stereochemical features of the diastereomeric solvates.
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Affiliation(s)
- Alessandra Recchimurzo
- Department of Chemistry and
Industrial Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy
| | - Cosimo Micheletti
- Department of Chemistry and
Industrial Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy
| | - Gloria Uccello-Barretta
- Department of Chemistry and
Industrial Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy
| | - Federica Balzano
- Department of Chemistry and
Industrial Chemistry, University of Pisa, via Moruzzi 13, 56124 Pisa, Italy
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41
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Wang SY, Li L, Xiao Y, Wang Y. Recent advances in cyclodextrins-based chiral-recognizing platforms. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.115691] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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42
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Scriba GK. Chiral recognition in separation sciences. Part I: Polysaccharide and cyclodextrin selectors. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.115639] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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43
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Lima YR, Peglow TJ, Nobre PC, Campos PT, Perin G, Lenardão EJ, Silva MS. Chalcogen‐Containing Diols: A Novel Chiral Derivatizing Agent for
77
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Te NMR Chiral Recognition of Primary Amines. ChemistrySelect 2019. [DOI: 10.1002/slct.201900097] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yanka Rocha Lima
- Laboratório de Síntese Orgânica Limpa – LASOLCentro de Ciências Químicas, Farmacêuticas e de Alimentos – CCQFAUniversidade Federal de Pelotas – UFPel, Capão do Leão-RS, Brazil
| | - Thiago Jacobsen Peglow
- Laboratório de Síntese Orgânica Limpa – LASOLCentro de Ciências Químicas, Farmacêuticas e de Alimentos – CCQFAUniversidade Federal de Pelotas – UFPel, Capão do Leão-RS, Brazil
| | - Patrick Carvalho Nobre
- Laboratório de Síntese Orgânica Limpa – LASOLCentro de Ciências Químicas, Farmacêuticas e de Alimentos – CCQFAUniversidade Federal de Pelotas – UFPel, Capão do Leão-RS, Brazil
| | | | - Gelson Perin
- Laboratório de Síntese Orgânica Limpa – LASOLCentro de Ciências Químicas, Farmacêuticas e de Alimentos – CCQFAUniversidade Federal de Pelotas – UFPel, Capão do Leão-RS, Brazil
| | - Eder J. Lenardão
- Laboratório de Síntese Orgânica Limpa – LASOLCentro de Ciências Químicas, Farmacêuticas e de Alimentos – CCQFAUniversidade Federal de Pelotas – UFPel, Capão do Leão-RS, Brazil
| | - Márcio S. Silva
- Laboratório de Síntese Orgânica Limpa – LASOLCentro de Ciências Químicas, Farmacêuticas e de Alimentos – CCQFAUniversidade Federal de Pelotas – UFPel, Capão do Leão-RS, Brazil
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44
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Menna M, Imperatore C, Mangoni A, Della Sala G, Taglialatela-Scafati O. Challenges in the configuration assignment of natural products. A case-selective perspective. Nat Prod Rep 2019; 36:476-489. [DOI: 10.1039/c8np00053k] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
An overview by a case study approach on the currently available methods for the configurational analysis of natural products.
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Affiliation(s)
- Marialuisa Menna
- Department of Pharmacy
- University of Naples Federico II
- 80131 Napoli
- Italy
| | | | - Alfonso Mangoni
- Department of Pharmacy
- University of Naples Federico II
- 80131 Napoli
- Italy
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45
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Self-induced recognition of enantiomers (SIRE) and its application in chiral NMR analysis. Trends Analyt Chem 2018. [DOI: 10.1016/j.trac.2018.07.020] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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46
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Synthesis of noval chiral tridentate amino alcohols as chiral solvating agents under ball-milling conditions. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.10.049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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47
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Marques NB, Jacob RG, Perin G, Lenardão EJ, Alves D, Silva MS. NMR chiral discrimination of chalcogen containing secondary alcohols. Chirality 2018; 31:41-51. [DOI: 10.1002/chir.23030] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 09/03/2018] [Accepted: 10/08/2018] [Indexed: 01/09/2023]
Affiliation(s)
- Naiade B.G. Marques
- Laboratório de Ressonância Magnética Nuclear, Centro de Ciências Naturais e Humanas (CCNH); Universidade Federal do ABC; Santo André Brazil
| | - Raquel G. Jacob
- Laboratório de Síntese Orgânica Limpa (LASOL), Centro de Ciências Químicas, Farmacêuticas e de Alimentos (CCQFA); Universidade Federal de Pelotas (UFPel); Capão do Leão Brazil
| | - Gelson Perin
- Laboratório de Síntese Orgânica Limpa (LASOL), Centro de Ciências Químicas, Farmacêuticas e de Alimentos (CCQFA); Universidade Federal de Pelotas (UFPel); Capão do Leão Brazil
| | - Eder J. Lenardão
- Laboratório de Síntese Orgânica Limpa (LASOL), Centro de Ciências Químicas, Farmacêuticas e de Alimentos (CCQFA); Universidade Federal de Pelotas (UFPel); Capão do Leão Brazil
| | - Diego Alves
- Laboratório de Síntese Orgânica Limpa (LASOL), Centro de Ciências Químicas, Farmacêuticas e de Alimentos (CCQFA); Universidade Federal de Pelotas (UFPel); Capão do Leão Brazil
| | - Márcio S. Silva
- Laboratório de Síntese Orgânica Limpa (LASOL), Centro de Ciências Químicas, Farmacêuticas e de Alimentos (CCQFA); Universidade Federal de Pelotas (UFPel); Capão do Leão Brazil
- Laboratório de Ressonância Magnética Nuclear, Centro de Ciências Naturais e Humanas (CCNH); Universidade Federal do ABC; Santo André Brazil
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48
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Kuksenok VY, Shtrykova VV, Filimonov VD, Druganov AG, Bondarev AA, Stankevich KS. The determination of enantiomer composition of 1-((3-chlorophenyl)-(phenyl)methyl) amine and 1-((3-chlorophenyl)(phenyl)-methyl) urea (Galodif) by NMR spectroscopy, chiral HPLC, and polarimetry. Chirality 2018; 30:1135-1143. [PMID: 30075486 DOI: 10.1002/chir.23005] [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: 03/28/2018] [Revised: 06/28/2018] [Accepted: 07/09/2018] [Indexed: 11/06/2022]
Abstract
For the first time, a method for enantiomer resolution of the anticonvulsant Galodif (1-((3-chlorophenyl)(phenyl)methyl) urea) by chiral HPLC was developed, whereas the enantiomeric composition of 1-((3-chlorophenyl)(phenyl)methyl) amine-precursor in Galodif synthesis-cannot be resolved by this method. However, starting 1-((3-chlorophenyl)(phenyl)methyl) amine quantitatively forms diastereomeric N-((3-chlorophenyl)(phenyl)methyl)-1-camphorsulfonamides in reaction with chiral (1R)-(+)- or (1S)-(-)-camphor-10-sulfonyl chlorides. The diastereomeric ratio of obtained camphorsulfonamides can be easily determined by NMR 1 H and 13 C spectroscopy. The DFT calculations of specific rotation of Galodif enantiomers showed good agreement with experimental data. The absolute configuration of enantiomers was proposed for the first time.
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Affiliation(s)
- Vera Yu Kuksenok
- The Kizhner Research Center, National Research Tomsk Polytechnic University, Tomsk, Russia
| | - Victoria V Shtrykova
- The Kizhner Research Center, National Research Tomsk Polytechnic University, Tomsk, Russia
| | - Victor D Filimonov
- The Kizhner Research Center, National Research Tomsk Polytechnic University, Tomsk, Russia
| | - Alexandr G Druganov
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia
| | | | - Ksenia S Stankevich
- The Kizhner Research Center, National Research Tomsk Polytechnic University, Tomsk, Russia
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49
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Ntountaniotis D. Reactions in NMR Tubes as Key Weapon in Rational Drug Design. METHODS IN MOLECULAR BIOLOGY (CLIFTON, N.J.) 2018; 1824:417-430. [PMID: 30039422 DOI: 10.1007/978-1-4939-8630-9_25] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
NMR spectroscopy is a powerful technique suitable for obtaining detailed structural and dynamic data at atomic resolution. Progress in NMR instrumentation has led the scientific community to produce novel techniques which provide valuable information to resolve demanding and crucial questions of molecular biology and rational drug design. This chapter outlines the progress of NMR spectroscopy in the rational drug design. In addition, it offers an example of a reaction in NMR tube for achieving rational drug design.
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Affiliation(s)
- Dimitrios Ntountaniotis
- Department of Chemistry, Laboratory of Organic Chemistry, National and Kapodistrian University of Athens, Athens, Greece.
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50
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Lankhorst PP, van Rijn JHJ, Duchateau ALL. One-Dimensional 13C NMR Is a Simple and Highly Quantitative Method for Enantiodiscrimination. Molecules 2018; 23:molecules23071785. [PMID: 30036942 PMCID: PMC6100457 DOI: 10.3390/molecules23071785] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 07/13/2018] [Accepted: 07/17/2018] [Indexed: 12/04/2022] Open
Abstract
The discrimination of enantiomers of mandelonitrile by means of 1D 13C NMR and with the aid of the chiral solvating agent (S)-(+)-1-(9-anthryl)-2,2,2-trifluoroethanol (TFAE) is presented. 1H NMR fails for this specific compound because proton signals either overlap with the signals of the chiral solvating agent or do not show separation between the (S)-enantiomer and the (R)-enantiomer. The 13C NMR method is validated by preparing artificial mixtures of the (R)-enantiomer and the racemate, and it is shown that with only 4 mg of mandelonitrile a detection limit of the minor enantiomer of 0.5% is obtained, corresponding to an enantiomeric excess value of 99%. Furthermore, the method shows high linearity, and has a small relative standard deviation of only 0.3% for the minor enantiomer when the relative abundance of this enantiomer is 20%. Therefore, the 13C NMR method is highly suitable for quantitative enantiodiscrimination. It is discussed that 13C NMR is preferred over 1H NMR in many situations, not only in molecules with more than one chiral center, resulting in complex mixtures of many stereoisomers, but also in the case of molecules with overlapping multiplets in the 1H NMR spectrum, and in the case of molecules with many quaternary carbon atoms, and therefore less abundant protons.
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Affiliation(s)
- Peter P Lankhorst
- DSM Biotechnology Center, P.O. Box 1, 2600 MA Delft, The Netherlands.
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