1
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Batista ANL, Valverde AL, Nafie LA, Batista JM. Stereochemistry of natural products from vibrational circular dichroism. Chem Commun (Camb) 2024. [PMID: 39234927 DOI: 10.1039/d4cc02481h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/06/2024]
Abstract
Secondary metabolites from land and marine (micro)organisms have been at the focus of the drug discovery process for many years. One of the reasons for this success is nature's incredible ability to create intricate molecular scaffolds. Such structural richness, however, makes the structural elucidation, and the absolute configuration assignment in particular, a challenging process. Vibrational circular dichroism (VCD) has emerged as one of the most reliable and versatile methods to unambiguously assign both the absolute configuration and conformations of chiral molecules in solution. Although VCD is no longer a curiosity in the field of molecular spectroscopy after 50 years since its first report, it is still underutilized by natural product chemists worldwide for varying reasons. Herein, we highlight the evolution of the application of VCD to natural product chemistry, focusing on its strengths as well as points that still need improvement. General guidelines for the correct application of VCD to stereochemical studies are also provided.
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Affiliation(s)
- Andrea N L Batista
- Institute of Chemistry, Fluminense Federal University, Outeiro de São João Batista s/n, 24020-141, Niterói-RJ, Brazil
| | - Alessandra L Valverde
- Institute of Chemistry, Fluminense Federal University, Outeiro de São João Batista s/n, 24020-141, Niterói-RJ, Brazil
| | - Laurence A Nafie
- Department of Chemistry, 1-014CST, Syracuse University, 13244-4100, Syracuse-NY, USA
| | - João M Batista
- Federal University of São Paulo, Institute of Science and Technology, R. Talim 330, 12231-280, São José dos Campos-SP, Brazil.
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2
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Groß J, Kühlborn J, Pusch S, Weber C, Andernach L, Renzer G, Eckhardt P, Brauer J, Opatz T. Comparison of different density functional theory methods for the calculation of vibrational circular dichroism spectra. Chirality 2023; 35:753-765. [PMID: 37227055 DOI: 10.1002/chir.23580] [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: 01/30/2023] [Revised: 05/02/2023] [Accepted: 05/03/2023] [Indexed: 05/26/2023]
Abstract
The determination of the absolute configuration (AC) of an organic molecule is still a challenging task for which the combination of spectroscopic with quantum-mechanical methods has become a promising approach. In this study, we investigated the accuracy of DFT methods (480 overall combinations of 15 functionals, 16 basis sets, and 2 solvation models) to calculate the VCD spectra of six chiral organic molecules in order to benchmark their capability to facilitate the determination of the AC.
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Affiliation(s)
- Jonathan Groß
- Department of Chemistry, Johannes Gutenberg University, Mainz, Germany
| | - Jonas Kühlborn
- Department of Chemistry, Johannes Gutenberg University, Mainz, Germany
| | - Stefan Pusch
- Department of Chemistry, Johannes Gutenberg University, Mainz, Germany
| | - Carina Weber
- Department of Chemistry, Johannes Gutenberg University, Mainz, Germany
| | - Lars Andernach
- Department of Chemistry, Johannes Gutenberg University, Mainz, Germany
| | - Galit Renzer
- Department of Chemistry, Johannes Gutenberg University, Mainz, Germany
| | - Paul Eckhardt
- Department of Chemistry, Johannes Gutenberg University, Mainz, Germany
| | - Jan Brauer
- Department of Chemistry, Johannes Gutenberg University, Mainz, Germany
| | - Till Opatz
- Department of Chemistry, Johannes Gutenberg University, Mainz, Germany
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3
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Bogaerts J, Aerts R, Vermeyen T, Johannessen C, Herrebout W, Batista JM. Tackling Stereochemistry in Drug Molecules with Vibrational Optical Activity. Pharmaceuticals (Basel) 2021; 14:877. [PMID: 34577577 PMCID: PMC8468215 DOI: 10.3390/ph14090877] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 08/25/2021] [Accepted: 08/26/2021] [Indexed: 12/29/2022] Open
Abstract
Chirality plays a crucial role in drug discovery and development. As a result, a significant number of commercially available drugs are structurally dissymmetric and enantiomerically pure. The determination of the exact 3D structure of drug candidates is, consequently, of paramount importance for the pharmaceutical industry in different stages of the discovery pipeline. Traditionally the assignment of the absolute configuration of druggable molecules has been carried out by means of X-ray crystallography. Nevertheless, not all molecules are suitable for single-crystal growing. Additionally, valuable information about the conformational dynamics of drug candidates is lost in the solid state. As an alternative, vibrational optical activity (VOA) methods have emerged as powerful tools to assess the stereochemistry of drug molecules directly in solution. These methods include vibrational circular dichroism (VCD) and Raman optical activity (ROA). Despite their potential, VCD and ROA are still unheard of to many organic and medicinal chemists. Therefore, the present review aims at highlighting the recent use of VOA methods for the assignment of the absolute configuration of chiral small-molecule drugs, as well as for the structural analysis of biologics of pharmaceutical interest. A brief introduction on VCD and ROA theory and the best experimental practices for using these methods will be provided along with selected representative examples over the last five years. As VCD and ROA are commonly used in combination with quantum calculations, some guidelines will also be presented for the reliable simulation of chiroptical spectra. Special attention will be paid to the complementarity of VCD and ROA to unambiguously assess the stereochemical properties of pharmaceuticals.
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Affiliation(s)
- Jonathan Bogaerts
- Department of Chemistry, University of Antwerp, 2020 Antwerp, Belgium; (J.B.); (R.A.); (T.V.); (C.J.); (W.H.)
| | - Roy Aerts
- Department of Chemistry, University of Antwerp, 2020 Antwerp, Belgium; (J.B.); (R.A.); (T.V.); (C.J.); (W.H.)
| | - Tom Vermeyen
- Department of Chemistry, University of Antwerp, 2020 Antwerp, Belgium; (J.B.); (R.A.); (T.V.); (C.J.); (W.H.)
- Department of Chemistry, Ghent University, 9000 Ghent, Belgium
| | - Christian Johannessen
- Department of Chemistry, University of Antwerp, 2020 Antwerp, Belgium; (J.B.); (R.A.); (T.V.); (C.J.); (W.H.)
| | - Wouter Herrebout
- Department of Chemistry, University of Antwerp, 2020 Antwerp, Belgium; (J.B.); (R.A.); (T.V.); (C.J.); (W.H.)
| | - Joao M. Batista
- Institute of Science and Technology, Federal University of Sao Paulo, Sao Jose dos Campos 12231-280, SP, Brazil
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4
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Sánchez Valera M, Casas Jaraíces R, Montejo M, Rodríguez Ortega PG. Vibrational Circular Dichroism study of chiral food additives: γ-valero- and γ-caprolactone. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 247:119140. [PMID: 33188971 DOI: 10.1016/j.saa.2020.119140] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 10/18/2020] [Accepted: 10/23/2020] [Indexed: 06/11/2023]
Abstract
γ-valerolactone and γ-caprolactone are commonly used as flavor additives in the food industry. In the present work we fully explore the molecular structure and conformational distribution of enantiopure γ-valerolactone and γ-caprolactone in solution state by using Vibrational Circular Dichroism (VCD) spectroscopy assisted by quantum chemical calculations. In order to establish the most accurate DFT method for this type of samples a set of methods and basis sets have been implemented and their performances have been compared. Subsequently, we have performed a complete vibrational assignment, which allowed to detect certain key vibrational features related to specific solution-state conformational speciation. In spite of the rigidity of the samples being studied, our results point to the incidence of conformational mixture in CCl4 solution in both samples.
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Affiliation(s)
- M Sánchez Valera
- Department of Physical and Analytical Chemistry, Experimental Sciences Faculty, University of Jaen, E-23071 Jaén, Spain
| | - R Casas Jaraíces
- Department of Physical and Analytical Chemistry, Experimental Sciences Faculty, University of Jaen, E-23071 Jaén, Spain
| | - M Montejo
- Department of Physical and Analytical Chemistry, Experimental Sciences Faculty, University of Jaen, E-23071 Jaén, Spain
| | - P G Rodríguez Ortega
- Department of Specific Didactics, Educational Sciences Faculty, University of Cordoba, E-14071 Córdoba, Spain.
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5
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Pons G, Riba D, Casasampere M, Izquierdo E, Abad JL, Fabriàs G, Rodríguez Ortega PG, López-González JJ, Montejo M, Casas J, Delgado A. A Mechanism-Based Sphingosine-1-phosphate Lyase Inhibitor. J Org Chem 2020; 85:419-429. [PMID: 31860798 DOI: 10.1021/acs.joc.9b02420] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The synthesis of a series of vinylated analogues of sphingosine-1-phosphate together with their unambiguous configurational assignment by VCD methods is reported. Among them, compound RBM10-8 can irreversibly inhibit human sphingosine-1-phosphate lyase (hS1PL) while behaving also as an enzyme substrate. These findings, together with the postulated mechanism for S1PL activity, reinforce the role of RBM10-8 as a new mechanism-based hS1PL inhibitor.
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Affiliation(s)
- Guillem Pons
- Spanish National Research Council (CSIC), Institute for Advanced Chemistry of Catalonia (IQAC-CSIC) , Research Unit on Bioactive Molecules (RUBAM), Department of Biological Chemistry , Jordi Girona 18-26 , 08034 Barcelona , Spain
| | - Daniel Riba
- Spanish National Research Council (CSIC), Institute for Advanced Chemistry of Catalonia (IQAC-CSIC) , Research Unit on Bioactive Molecules (RUBAM), Department of Biological Chemistry , Jordi Girona 18-26 , 08034 Barcelona , Spain
| | - Mireia Casasampere
- Spanish National Research Council (CSIC), Institute for Advanced Chemistry of Catalonia (IQAC-CSIC) , Research Unit on Bioactive Molecules (RUBAM), Department of Biological Chemistry , Jordi Girona 18-26 , 08034 Barcelona , Spain.,University of Barcelona (UB) , Faculty of Pharmacy, Department of Pharmacology, Toxicology and Medicinal Chemistry, Unit of Pharmaceutical Chemistry (Associated Unit to CSIC) , Avda. Joan XXIII s/n , 08028 Barcelona , Spain
| | - Eduardo Izquierdo
- Spanish National Research Council (CSIC), Institute for Advanced Chemistry of Catalonia (IQAC-CSIC) , Research Unit on Bioactive Molecules (RUBAM), Department of Biological Chemistry , Jordi Girona 18-26 , 08034 Barcelona , Spain.,University of Barcelona (UB) , Faculty of Pharmacy, Department of Pharmacology, Toxicology and Medicinal Chemistry, Unit of Pharmaceutical Chemistry (Associated Unit to CSIC) , Avda. Joan XXIII s/n , 08028 Barcelona , Spain
| | - José-Luís Abad
- Spanish National Research Council (CSIC), Institute for Advanced Chemistry of Catalonia (IQAC-CSIC) , Research Unit on Bioactive Molecules (RUBAM), Department of Biological Chemistry , Jordi Girona 18-26 , 08034 Barcelona , Spain
| | - Gemma Fabriàs
- Spanish National Research Council (CSIC), Institute for Advanced Chemistry of Catalonia (IQAC-CSIC) , Research Unit on Bioactive Molecules (RUBAM), Department of Biological Chemistry , Jordi Girona 18-26 , 08034 Barcelona , Spain.,Centro de Investigación Biomédica en Red (CIBEREHD) , 28029 Madrid , Spain
| | - Pilar G Rodríguez Ortega
- University of Jaén , Faculty of Experimental Sciences, Department of Physical and Analytical Chemistry , Campus Las Lagunillas , 23071 Jaén , Spain
| | - Juan J López-González
- University of Jaén , Faculty of Experimental Sciences, Department of Physical and Analytical Chemistry , Campus Las Lagunillas , 23071 Jaén , Spain
| | - Manuel Montejo
- University of Jaén , Faculty of Experimental Sciences, Department of Physical and Analytical Chemistry , Campus Las Lagunillas , 23071 Jaén , Spain
| | - Josefina Casas
- Spanish National Research Council (CSIC), Institute for Advanced Chemistry of Catalonia (IQAC-CSIC) , Research Unit on Bioactive Molecules (RUBAM), Department of Biological Chemistry , Jordi Girona 18-26 , 08034 Barcelona , Spain.,Centro de Investigación Biomédica en Red (CIBEREHD) , 28029 Madrid , Spain
| | - Antonio Delgado
- Spanish National Research Council (CSIC), Institute for Advanced Chemistry of Catalonia (IQAC-CSIC) , Research Unit on Bioactive Molecules (RUBAM), Department of Biological Chemistry , Jordi Girona 18-26 , 08034 Barcelona , Spain.,University of Barcelona (UB) , Faculty of Pharmacy, Department of Pharmacology, Toxicology and Medicinal Chemistry, Unit of Pharmaceutical Chemistry (Associated Unit to CSIC) , Avda. Joan XXIII s/n , 08028 Barcelona , Spain
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6
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Monaco G, Procida G, Di Mola A, Herrebout W, Massa A. Error bounds on goodness of fit indicators in vibrational circular dichroism spectroscopy. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2019.137000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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7
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De Gussem E, Tehrani KA, Herrebout WA, Bultinck P, Johannessen C. Comparative Study of the Vibrational Optical Activity Techniques in Structure Elucidation: The Case of Galantamine. ACS OMEGA 2019; 4:14133-14139. [PMID: 31497733 PMCID: PMC6714543 DOI: 10.1021/acsomega.9b02108] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 08/06/2019] [Indexed: 05/03/2023]
Abstract
The absolute configuration of the alkaloid galantamine was studied using a range of solution-state techniques; nuclear magnetic resonance (NMR), vibrational circular dichroism (VCD), and Raman optical activity (ROA). While the combined use of NMR and VCD does provide a fast, high-resolution methodology for determining the absolute configuration of galantamine, both techniques were needed in concert to achieve this goal. ROA, on the other hand, proved to be sensitive enough to assign the full absolute configuration without relying on other techniques. In both cases, statistical validation was applied to aid the determination of absolute configuration. In the case of galantamine, ROA combined with statistical validation is shown to be a powerful stand-alone tool for absolute configuration determination.
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Affiliation(s)
- Ewoud De Gussem
- Ghent
Quantum Chemistry Group, Department of Chemistry, Ghent University, Krijgslaan
281 (S3), 9000 Ghent, Belgium
- Department
of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | | | - Wouter A. Herrebout
- Department
of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - Patrick Bultinck
- Ghent
Quantum Chemistry Group, Department of Chemistry, Ghent University, Krijgslaan
281 (S3), 9000 Ghent, Belgium
| | - Christian Johannessen
- Department
of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
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8
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Blons C, Morin MST, Schmid TE, Vives T, Colombel‐Rouen S, Baslé O, Reynaldo T, Covington CL, Halbert S, Cuskelly SN, Bernhardt PV, Williams CM, Crassous J, Polavarapu PL, Crévisy C, Gérard H, Mauduit M. Asymmetric Sequential Cu‐Catalyzed 1,6/1,4‐Conjugate Additions of Hard Nucleophiles to Cyclic Dienones: Determination of Absolute Configurations and Origins of Enantioselectivity. Chemistry 2017; 23:7515-7525. [DOI: 10.1002/chem.201606034] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2016] [Revised: 03/08/2017] [Indexed: 01/08/2023]
Affiliation(s)
- Charlie Blons
- Ecole Nationale Supérieure de Chimie de Rennes CNRS UMR 6226 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 7 France
| | - Marie S. T. Morin
- Ecole Nationale Supérieure de Chimie de Rennes CNRS UMR 6226 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 7 France
| | - Thibault E. Schmid
- Ecole Nationale Supérieure de Chimie de Rennes CNRS UMR 6226 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 7 France
| | - Thomas Vives
- Ecole Nationale Supérieure de Chimie de Rennes CNRS UMR 6226 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 7 France
| | - Sophie Colombel‐Rouen
- Ecole Nationale Supérieure de Chimie de Rennes CNRS UMR 6226 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 7 France
| | - Olivier Baslé
- Ecole Nationale Supérieure de Chimie de Rennes CNRS UMR 6226 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 7 France
| | - Thibault Reynaldo
- Université de Rennes 1 CNRS, UMR 6226 Campus de Beaulieu 35042 Rennes Cedex France
| | - Cody L. Covington
- Department of Chemistry Vanderbilt University Nashville TN 37235 USA
| | - Stéphanie Halbert
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Laboratoire de Chimie Théorique CC 137, 4 place Jussieu F. 75252 Paris Cedex 05 France
| | - Sean N. Cuskelly
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane QLD 4072 Australia
| | - Paul V. Bernhardt
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane QLD 4072 Australia
| | - Craig M. Williams
- School of Chemistry and Molecular Biosciences The University of Queensland Brisbane QLD 4072 Australia
| | - Jeanne Crassous
- Université de Rennes 1 CNRS, UMR 6226 Campus de Beaulieu 35042 Rennes Cedex France
| | | | - Christophe Crévisy
- Ecole Nationale Supérieure de Chimie de Rennes CNRS UMR 6226 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 7 France
| | - Hélène Gérard
- Sorbonne Universités UPMC Univ Paris 06, CNRS, Laboratoire de Chimie Théorique CC 137, 4 place Jussieu F. 75252 Paris Cedex 05 France
| | - Marc Mauduit
- Ecole Nationale Supérieure de Chimie de Rennes CNRS UMR 6226 11 allée de Beaulieu, CS 50837 35708 Rennes Cedex 7 France
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9
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Srebro-Hooper M, Autschbach J. Calculating Natural Optical Activity of Molecules from First Principles. Annu Rev Phys Chem 2017; 68:399-420. [DOI: 10.1146/annurev-physchem-052516-044827] [Citation(s) in RCA: 94] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, New York 14260
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10
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Covington CL, Polavarapu PL. CDSpecTech: A single software suite for multiple chiroptical spectroscopic analyses. Chirality 2017; 29:178-192. [PMID: 28403537 DOI: 10.1002/chir.22691] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 12/15/2016] [Accepted: 12/19/2016] [Indexed: 01/07/2023]
Abstract
The program CDSpecTech was developed to facilitate the analysis of chiroptical spectra, which include the following: vibrational circular dichroism (VCD) and corresponding vibrational absorption (VA) spectra; vibrational Raman optical activity (VROA) and corresponding vibrational Raman spectra; electronic circular dichroism (ECD) and corresponding electronic absorption (EA) spectra. In addition, the program allows for generating optical rotatory dispersion (ORD) as the Kramers-Kronig transform of ECD spectra. The simulation of theoretical spectra from transition strengths can be achieved using different bandshape profiles. The experimental and simulated theoretical spectra can be visually compared by displaying them together. A unique feature of CDSpecTech is performing spectral analysis using the ratio spectra; i.e., the dimensionless dissymmetry factor (DF) spectrum, which is the ratio of CD to absorption spectra, and the dimensionless circular intensity difference (CID) spectrum, which is the ratio of VROA to vibrational Raman spectra. The quantitative agreement between experimental and simulated theoretical spectra can also be assessed from the numerical similarity overlap between them. Two different similarity overlap methods are available. The program uses a graphical user interface which allows for ease of use and facilitates the analysis. All these features make CDSpecTech a valuable tool for the analysis of chiroptical spectra. The program is freely available on the World Wide Web.
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Affiliation(s)
- Cody L Covington
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee, USA
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11
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Monaco G, Aquino F, Zanasi R, Herrebout W, Bultinck P, Massa A. Model-averaging of ab initio spectra for the absolute configuration assignment via vibrational circular dichroism. Phys Chem Chem Phys 2017; 19:28028-28036. [DOI: 10.1039/c7cp05358d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Unescapable errors of calculations are taken into account through a model-averaging technique, opening the way to a quantitative comparison with experiment.
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Affiliation(s)
- Guglielmo Monaco
- Department of Chemistry and Biology “A. Zambelli”
- University of Salerno
- Via G. Paolo II
- 132
- Fisciano 84084
| | - Francesco Aquino
- Department of Chemistry and Biology “A. Zambelli”
- University of Salerno
- Via G. Paolo II
- 132
- Fisciano 84084
| | - Riccardo Zanasi
- Department of Chemistry and Biology “A. Zambelli”
- University of Salerno
- Via G. Paolo II
- 132
- Fisciano 84084
| | | | - Patrick Bultinck
- Department of Inorganic and Physical Chemistry
- Ghent University
- Belgium
| | - Antonio Massa
- Department of Chemistry and Biology “A. Zambelli”
- University of Salerno
- Via G. Paolo II
- 132
- Fisciano 84084
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12
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Reinscheid F, Reinscheid U. Stereochemical analysis of (+)-limonene using theoretical and experimental NMR and chiroptical data. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.10.061] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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13
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Qiu S, Tehrani KA, Sergeyev S, Bultinck P, Herrebout W, Mathieu B. Stereochemistry of the Brivaracetam Diastereoisomers. Chirality 2016; 28:215-25. [DOI: 10.1002/chir.22558] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 10/29/2015] [Accepted: 11/02/2015] [Indexed: 11/07/2022]
Affiliation(s)
- Shi Qiu
- Department of Chemistry; University of Antwerp; Antwerp Belgium
| | | | - Sergey Sergeyev
- Department of Chemistry; University of Antwerp; Antwerp Belgium
| | - Patrick Bultinck
- Department of Inorganic and Physical Chemistry; Ghent University; Ghent Belgium
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14
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Kohout M, Vandenbussche J, Roller A, Tůma J, Bogaerts J, Bultinck P, Herrebout W, Lindner W. Absolute configuration of the antimalarial erythro-mefloquine – vibrational circular dichroism and X-ray diffraction studies of mefloquine and its thiourea derivative. RSC Adv 2016. [DOI: 10.1039/c6ra19367f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The long-standing discussion of the absolute configuration of erythro-mefloquine is revisited, showcasing the strength of a combination of experimental and calculated vibrational circular dichroism spectroscopy.
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Affiliation(s)
- M. Kohout
- Department of Organic Chemistry
- University of Chemistry and Technology Prague
- Technická 5
- 166 28 Prague
- Czech Republic
| | - J. Vandenbussche
- Department of Inorganic and Physical Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - A. Roller
- Institute of Inorganic Chemistry
- University of Vienna
- 1090 Vienna
- Austria
| | - J. Tůma
- Department of Organic Chemistry
- University of Chemistry and Technology Prague
- Technická 5
- 166 28 Prague
- Czech Republic
| | - J. Bogaerts
- Department of Chemistry
- University of Antwerp
- 2020 Antwerp
- Belgium
| | - P. Bultinck
- Department of Inorganic and Physical Chemistry
- Ghent University
- 9000 Ghent
- Belgium
| | - W. Herrebout
- Department of Chemistry
- University of Antwerp
- 2020 Antwerp
- Belgium
| | - W. Lindner
- Institute of Analytical Chemistry
- University of Vienna
- 1090 Vienna
- Austria
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15
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Mutter ST, Zielinski F, Popelier PLA, Blanch EW. Calculation of Raman optical activity spectra for vibrational analysis. Analyst 2015; 140:2944-56. [DOI: 10.1039/c4an02357a] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review provides the necessary knowledge to accurately model ROA spectra of solvated systems and interpret their vibrational characteristics.
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Affiliation(s)
- Shaun T. Mutter
- Manchester Institute of Biotechnology and Faculty of Life Sciences
- University of Manchester
- Manchester
- UK
| | - François Zielinski
- Manchester Institute of Biotechnology and School of Chemistry
- University of Manchester
- Manchester
- UK
| | - Paul L. A. Popelier
- Manchester Institute of Biotechnology and School of Chemistry
- University of Manchester
- Manchester
- UK
| | - Ewan W. Blanch
- Manchester Institute of Biotechnology and Faculty of Life Sciences
- University of Manchester
- Manchester
- UK
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16
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Junior FMS, Covington CL, de Amorim MB, Velozo LSM, Kaplan MAC, Polavarapu PL. Absolute Configuration of a Rare Sesquiterpene: (+)-3-Ishwarone. JOURNAL OF NATURAL PRODUCTS 2014; 77:1881-6. [PMID: 25051336 DOI: 10.1021/np500363e] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
To determine the absolute configuration of 3-ishwarone, the experimental electronic circular dichroism (ECD), electronic dissymmetry factor (EDF), optical rotatory dispersion (ORD), vibrational circular dichroism (VCD), and vibrational dissymmetry factor (VDF) spectra of (+)-3-ishwarone are analyzed with the corresponding density functional theoretical predictions for different diastereomers. ECD and ORD spectra by themselves could not facilitate the determination of the absolute configuration of this molecule. However, the magnitude of the experimental EDF of (+)-3-ishwarone is found to match better with that predicted for the (1R,2S,4S,5R,9R,11R) diastereomer. The analyses of similarity measures between experimental and predicted spectra for VCD and VDF clearly suggested that the absolute configuration of (+)-3-ishwarone is (1R,2S,4S,5R,9R,11R).
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Affiliation(s)
- Fernando M S Junior
- Instituto de Pesquisas de Produtos Naturais, Universidade Federal do Rio de Janeiro , 21941-902, Rio de Janeiro, RJ, Brazil
| | - Cody L Covington
- Department of Chemistry, Vanderbilt University , Nashville, Tennessee 37235, United States
| | - Mauro B de Amorim
- Instituto de Pesquisas de Produtos Naturais, Universidade Federal do Rio de Janeiro , 21941-902, Rio de Janeiro, RJ, Brazil
| | - Leosvaldo S M Velozo
- Instituto de Pesquisas de Produtos Naturais, Universidade Federal do Rio de Janeiro , 21941-902, Rio de Janeiro, RJ, Brazil
| | - Maria A C Kaplan
- Instituto de Pesquisas de Produtos Naturais, Universidade Federal do Rio de Janeiro , 21941-902, Rio de Janeiro, RJ, Brazil
| | - Prasad L Polavarapu
- Department of Chemistry, Vanderbilt University , Nashville, Tennessee 37235, United States
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Polavarapu PL, Covington CL. Comparison of experimental and calculated chiroptical spectra for chiral molecular structure determination. Chirality 2014; 26:539-52. [PMID: 24644231 DOI: 10.1002/chir.22316] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 01/26/2014] [Accepted: 02/07/2014] [Indexed: 01/30/2023]
Abstract
For three different chiroptical spectroscopic methods, namely, vibrational circular dichroism (VCD), electronic circular dichroism (ECD), and Raman optical activity (ROA), the measures of similarity of the experimental spectra to the corresponding spectra predicted using quantum chemical theories are summarized. In determining the absolute configuration and/or predominant conformations of chiral molecules, these similarity measures provide numerical estimates of agreement between experimental observations and theoretical predictions. Selected applications illustrating the similarity measures for absorption, circular dichroism, and corresponding dissymmetry factor (DF) spectra, in the case of VCD and ECD, and for Raman, ROA, and circular intensity differential (CID) spectra in the case of ROA, are presented. The analysis of similarity in DF or CID spectra is considered to be much more discerning and accurate than that in absorption (or Raman) and circular dichroism (or ROA) spectra, undertaken individually.
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