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Mando M, Grellepois F, Blanc A, Hénon E, Riguet E. Toward Efficient and Stereoselective Aromatic and Dearomative Cope Rearrangements: Experimental and Theoretical Investigations of α-Allyl-α'-Aromatic γ-Lactone Derivatives. Chemistry 2024; 30:e202304138. [PMID: 38284279 DOI: 10.1002/chem.202304138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 01/25/2024] [Accepted: 01/29/2024] [Indexed: 01/30/2024]
Abstract
The aromatic Cope rearrangement is an elusive transformation that has been the subject of a limited number of investigations compared to those seemingly close analogues, namely the Cope and aromatic Claisen rearrangement. Herein we report our investigations inspired by moderate success observed in the course of pioneering works. By careful experimental and theoretical investigations, we demonstrate that key substitutions on 1,5-hexadiene scaffold allow fruitful transformations. Especially, efficient functionalisation of the heteroaromatic rings results from the aromatic Cope rearrangement, while highly stereoselective interrupted aromatic Cope rearrangements highlight the formation of chiral compounds through a dearomative process.
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Affiliation(s)
- Morgane Mando
- Université de Reims Champagne Ardenne, CNRS, Institut de Chimie Moléculaire de Reims, UMR 7312, 51097, Reims, France
| | - Fabienne Grellepois
- Université de Reims Champagne Ardenne, CNRS, Institut de Chimie Moléculaire de Reims, UMR 7312, 51097, Reims, France
| | - Aurélien Blanc
- Université de Strasbourg, CNRS, Institut de Chimie, UMR 7177, 4 rue Blaise Pascal, CS90032, 67081, Strasbourg, France
| | - Eric Hénon
- Université de Reims Champagne Ardenne, CNRS, Institut de Chimie Moléculaire de Reims, UMR 7312, 51097, Reims, France
| | - Emmanuel Riguet
- Université de Reims Champagne Ardenne, CNRS, Institut de Chimie Moléculaire de Reims, UMR 7312, 51097, Reims, France
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2
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Lefebvre C, Klein J, Khartabil H, Boisson JC, Hénon E. IGMPlot: A program to identify, characterize, and quantify molecular interactions. J Comput Chem 2023. [PMID: 37177853 DOI: 10.1002/jcc.27123] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 04/06/2023] [Accepted: 04/14/2023] [Indexed: 05/15/2023]
Abstract
We describe the development and features of a program called IGMPlot, which is based on the independent gradient model (IGM) and its local descriptor δ g $$ \delta g $$ . The IGM approach analyzes the gradient of the electron density (ED) in a molecular system to identify regions of space where chemical interactions take place. IGMPlot is intended for use by both experimental scientists and theoretical chemists. It is standalone software written in C++, with versions available for multiple platforms. Some key features are: probing and quantifying interactions between two given molecular fragments, determining bond strength (IBSI), estimating the atomic contributions to an intermolecular interaction and preparing data to build 2D and 3D representations of interaction regions. The software has been updated to include new features: critical point analysis of the ED, assessing ED asymmetry of a given bond (PDA) and a new descriptor called q g $$ qg $$ designed to enhance the IGM- δ g $$ \delta g $$ analysis. The program can be found at: http://igmplot.univ-reims.fr.
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Affiliation(s)
- C Lefebvre
- Laboratoire Lorrain de Chimie Moléculaire UMR CNRS 7053, Université de Lorraine, Vandoeuvre-lès-Nancy, France
| | - J Klein
- Institut Charles Gerhardt Montpellier, UMR CNRS 5253, Université de Montpellier, Pôle Chimie Balard Recherche, Montpellier, France
| | - H Khartabil
- Institut de Chimie Moléculaire de Reims UMR CNRS 7312, Université de Reims Champagne-Ardenne, Moulin de la Housse, Reims, France
| | - J-C Boisson
- Laboratoire d'Informatique en Calcul Intensif et Image pour la Simulation (LICIIS), Université de Reims Champagne-Ardenne, Moulin de la Housse, Reims, France
| | - E Hénon
- Institut de Chimie Moléculaire de Reims UMR CNRS 7312, Université de Reims Champagne-Ardenne, Moulin de la Housse, Reims, France
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3
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Lefebvre C, Khartabil H, Hénon E. New insight into atomic-level interpretation of interactions in molecules and reacting systems. Phys Chem Chem Phys 2023; 25:11398-11409. [PMID: 37021406 DOI: 10.1039/d2cp02839e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Abstract
We hereby introduce the atomic Degree Of Interaction (DOI), a new concept rooted in the electron density-based Independent Gradient Model (IGM). Capturing any manifestation of electron density sharing around an...
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Affiliation(s)
- Corentin Lefebvre
- Institut de la Matière condensée et des Nanosciences, Catholic University of Louvain, Lavoisier building Place Louis Pasteur 1, mailbox L4.01.02, 1348, Louvain-la-Neuve, Belgium
| | - Hassan Khartabil
- Institut de Chimie Moléculaire de Reims UMR CNRS 7312, Université de Reims Champagne-Ardenne, Moulin de la Housse, F-51687 Reims Cedex 02 BP 1039, France.
| | - Eric Hénon
- Institut de Chimie Moléculaire de Reims UMR CNRS 7312, Université de Reims Champagne-Ardenne, Moulin de la Housse, F-51687 Reims Cedex 02 BP 1039, France.
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Pascual LMH, Boudesocque S, Dupont L, Hénon E, Mohamadou A, Plantier-Royon R, GATARD S. New Water‐Soluble Au(III) Complexes with Xyloside‐based Ligands: Synthesis, Structural Characterization, Solution Studies and Catalytic Evaluation. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Laura M. H. Pascual
- Universite de Reims Champagne-Ardenne Institut de Chimie Moléculaire de Reims FRANCE
| | - Stéphanie Boudesocque
- Universite de Reims Champagne-Ardenne Institut de Chimie Moléculaire de Reims FRANCE
| | - Laurent Dupont
- Institut de Chimie Moleculaire de Reims Institut de Chimie Moléculaire de Reims FRANCE
| | - Eric Hénon
- Universite de Reims Champagne-Ardenne Institut de Chimie Moléculaire de Reims FRANCE
| | - Aminou Mohamadou
- Universite de Reims Champagne-Ardenne Institut de Chimie Moléculaire de Reims FRANCE
| | | | - Sylvain GATARD
- Université de Reims Champagne-Ardenne Institut de Chimie Moléculaire de Reims, CNRS UMR 7312 Case postale 44UFR des Sciences Exactes et NaturellesBP1039 51687 Reims FRANCE
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Weiss R, Cornaton Y, Khartabil H, Groslambert L, Hénon E, Pale P, Djukic J, Mamane V. Deciphering the Role of Noncovalent Interactions in the Conformations of Dibenzo‐1,5‐dichalcogenocines. Chempluschem 2022. [DOI: 10.1002/cplu.202200044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Robin Weiss
- Institute of Chemistry of Strasbourg, UMR 7177 - LASYROC CNRS and Strasbourg University 4 rue Blaise Pascal 67000 Strasbourg France) (VM
| | - Yann Cornaton
- Institute of Chemistry of Strasbourg, UMR 7177 - LCSOM CNRS and Strasbourg University 4 rue Blaise Pascal 67000 Strasbourg France) (JPD
| | - Hassan Khartabil
- CNRS, ICMR UMR 7312 Université de Reims Champagne Ardenne 51097 Reims France
| | - Loïc Groslambert
- Institute of Chemistry of Strasbourg, UMR 7177 - LASYROC CNRS and Strasbourg University 4 rue Blaise Pascal 67000 Strasbourg France) (VM
- Institute of Chemistry of Strasbourg, UMR 7177 - LCSOM CNRS and Strasbourg University 4 rue Blaise Pascal 67000 Strasbourg France) (JPD
| | - Eric Hénon
- CNRS, ICMR UMR 7312 Université de Reims Champagne Ardenne 51097 Reims France
| | - Patrick Pale
- Institute of Chemistry of Strasbourg, UMR 7177 - LASYROC CNRS and Strasbourg University 4 rue Blaise Pascal 67000 Strasbourg France) (VM
| | - Jean‐Pierre Djukic
- Institute of Chemistry of Strasbourg, UMR 7177 - LCSOM CNRS and Strasbourg University 4 rue Blaise Pascal 67000 Strasbourg France) (JPD
| | - Victor Mamane
- Institute of Chemistry of Strasbourg, UMR 7177 - LASYROC CNRS and Strasbourg University 4 rue Blaise Pascal 67000 Strasbourg France) (VM
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Mamane V, Weiss R, Cornaton Y, Khartabil H, Groslambert L, Hénon E, Pale P, Djukic JP. Deciphering the Role of Noncovalent Interactions in the Conformations of Dibenzo‐1,5‐dichalcogenocines. Chempluschem 2022; 87:e202100518. [DOI: 10.1002/cplu.202100518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 01/03/2022] [Indexed: 11/07/2022]
Affiliation(s)
- Victor Mamane
- University of Strasbourg: Universite de Strasbourg Institut of Chemistry 1 Rue Blaise Pascal 67008 Strasbourg FRANCE
| | - Robin Weiss
- Université de Strasbourg: Universite de Strasbourg Institut de Chimie de Strasbourg FRANCE
| | - Yann Cornaton
- Université de Strasbourg: Universite de Strasbourg Institut de Chimie de Strasbroug FRANCE
| | - Hassan Khartabil
- Université de Reims Champagne-Ardenne: Universite de Reims Champagne-Ardenne Institut de Chimie Moléculaire FRANCE
| | - Loïc Groslambert
- Universite de Strasbourg Institut de Chimie de Strasbourg FRANCE
| | - Eric Hénon
- Universite de Reims Champagne-Ardenne Institut de Chimie Moléculaire FRANCE
| | - Patrick Pale
- Universite de Strasbourg Institut de Cimie de Strasbourg FRANCE
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Ponce-Vargas M, Klein J, Hénon E. Novel approach to accurately predict bond strength and ligand lability in platinum-based anticancer drugs. Dalton Trans 2021; 49:12632-12642. [PMID: 32870220 DOI: 10.1039/d0dt02552f] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Prompted by the antineoplastic properties of cisplatin, a plethora of platinum(ii)-based complexes have been synthesized in the past decades. At present, their rational design is based on a number of structure-activity relationships involving the nature of the ligands initially coordinated to platinum(ii): either non-labile (acting as a carrier) or labile (undergoing substitution). The coordinate bond strength of the labile ligand plays a key role in the first step of the drug mechanism of action, i.e., the hydrolysis process, which is associated to the retention time of the medicine in the body. Therefore, an accurate determination of the metal-ligand bond strength becomes highly relevant as it will help the rational design of novel chemotherapeutic agents. Herein, we challenge the recently developed intrinsic bond strength index (IBSI) as a rapid and practical tool to assess the ligand lability in Pt(ii) complexes. In a first stage, given the importance of the trans-effect in synthetic strategies of cisplatin-based drugs, the effect of eleven trans-directing ligands T is quantified in two sets of complexes [Pt(NH3)2(H2O)T]n+ and [PtCl2(NH3)T]m+ where T = H2O, F-, NH3, Cl-, Br-, I-, SO32-, CH3-, CN-, CO, and H-. An essential outcome of this work is a novel index IBSItrans = IBSIσ + IBSIπ able to rank the directing ligands by their trans-effect according to their σ-donation and π-backbonding electronic contributions. In a second stage, we apply the IBSI score to a panel of eleven case studies, comprising mostly antineoplastic agents, such as cisplatin, carboplatin, lobaplatin etc., in order to quantify the coordinate bond strength of the ligands, providing insights about the hydrolysis process. The obtained results, in good agreement with experimental data and reported theoretical studies, demonstrate that the IBSI score is able to deliver a rapid and reliable picture of the coordinate bond strength, representing a chemically intuitive tool helpful for the development of novel anticancer agents prior to synthetic efforts.
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Affiliation(s)
- Miguel Ponce-Vargas
- Institut de Chimie Moléculaire de Reims UMR CNRS 7312, Université de Reims Champagne-Ardenne, Moulin de la Housse 51687, Reims Cedex 02 BP39, France.
| | - Johanna Klein
- Institut de Chimie Moléculaire de Reims UMR CNRS 7312, Université de Reims Champagne-Ardenne, Moulin de la Housse 51687, Reims Cedex 02 BP39, France.
| | - Eric Hénon
- Institut de Chimie Moléculaire de Reims UMR CNRS 7312, Université de Reims Champagne-Ardenne, Moulin de la Housse 51687, Reims Cedex 02 BP39, France.
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Allart-Simon I, Moniot A, Bisi N, Ponce-Vargas M, Audonnet S, Laronze-Cochard M, Sapi J, Hénon E, Velard F, Gérard S. Pyridazinone derivatives as potential anti-inflammatory agents: synthesis and biological evaluation as PDE4 inhibitors. RSC Med Chem 2021; 12:584-592. [PMID: 34046629 PMCID: PMC8127987 DOI: 10.1039/d0md00423e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 02/10/2021] [Indexed: 11/21/2022] Open
Abstract
Cyclic nucleotide phosphodiesterase type 4 (PDE4), which controls the intracellular level of cyclic adenosine monophosphate (cAMP), has aroused scientific attention as a suitable target for anti-inflammatory therapy of respiratory diseases. This work describes the development and characterization of pyridazinone derivatives bearing an indole moiety as potential PDE4 inhibitors and their evaluation as anti-inflammatory agents. Among these derivatives, 4-(5-methoxy-1H-indol-3-yl)-6-methylpyridazin-3(2H)-one possesses promising activity, and selectivity towards PDE4B isoenzymes and is able to regulate potent pro-inflammatory cytokine and chemokine production by human primary macrophages.
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Affiliation(s)
- Ingrid Allart-Simon
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), UMR CNRS 7312, UFR Sciences, Moulin de la housse and UFR Pharmacie 51 rue Cognacq-Jay F-51096 Reims France
| | - Aurélie Moniot
- Université de Reims-Champagne-Ardenne, EA 4691 Biomatériaux & Inflammation en site OSseux (BIOS), UFR Pharmacie and UFR Odontologie 51 rue Cognacq-Jay F-51096 Reims France
| | - Nicolo Bisi
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), UMR CNRS 7312, UFR Sciences, Moulin de la housse and UFR Pharmacie 51 rue Cognacq-Jay F-51096 Reims France
| | - Miguel Ponce-Vargas
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), UMR CNRS 7312, UFR Sciences, Moulin de la housse and UFR Pharmacie 51 rue Cognacq-Jay F-51096 Reims France
| | - Sandra Audonnet
- Université de Reims-Champagne-Ardenne, URCACyt, UFR Pharmacie 51 rue Cognacq-Jay F-51096 Reims France
| | - Marie Laronze-Cochard
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), UMR CNRS 7312, UFR Sciences, Moulin de la housse and UFR Pharmacie 51 rue Cognacq-Jay F-51096 Reims France
| | - Janos Sapi
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), UMR CNRS 7312, UFR Sciences, Moulin de la housse and UFR Pharmacie 51 rue Cognacq-Jay F-51096 Reims France
| | - Eric Hénon
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), UMR CNRS 7312, UFR Sciences, Moulin de la housse and UFR Pharmacie 51 rue Cognacq-Jay F-51096 Reims France
| | - Frédéric Velard
- Université de Reims-Champagne-Ardenne, EA 4691 Biomatériaux & Inflammation en site OSseux (BIOS), UFR Pharmacie and UFR Odontologie 51 rue Cognacq-Jay F-51096 Reims France
| | - Stéphane Gérard
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), UMR CNRS 7312, UFR Sciences, Moulin de la housse and UFR Pharmacie 51 rue Cognacq-Jay F-51096 Reims France
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Wieduwilt EK, Boisson JC, Terraneo G, Hénon E, Genoni A. A Step toward the Quantification of Noncovalent Interactions in Large Biological Systems: The Independent Gradient Model-Extremely Localized Molecular Orbital Approach. J Chem Inf Model 2021; 61:795-809. [PMID: 33444021 DOI: 10.1021/acs.jcim.0c01188] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The independent gradient model (IGM) is a recent electron density-based computational method that enables to detect and quantify covalent and noncovalent interactions. When applied to large systems, the original version of the technique still relies on promolecular electron densities given by the sum of spherically averaged atomic electron distributions, which leads to approximate evaluations of the inter- and intramolecular interactions occurring in systems of biological interest. To overcome this drawback and perform IGM analyses based on quantum mechanically rigorous electron densities also for macromolecular systems, we coupled the IGM approach with the recently constructed libraries of extremely localized molecular orbitals (ELMOs) that allow fast and reliable reconstructions of polypeptide and protein electron densities. The validation tests performed on small polypeptides and peptide dimers have shown that the novel IGM-ELMO strategy provides results that are systematically closer to the fully quantum mechanical ones and outperforms the IGM method based on the crude promolecular approximation, but still keeping a quite low computational cost. The results of the test calculations carried out on proteins have also confirmed the trends observed for the IGM analyses conducted on small systems. This makes us envisage the future application of the novel IGM-ELMO approach to unravel complicated noncovalent interaction networks (e.g., in protein-protein contacts) or to rationally design new drugs through molecular docking calculations and virtual high-throughput screenings.
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Affiliation(s)
- Erna K Wieduwilt
- Université de Lorraine & CNRS, Laboratoire de Physique et Chimie Théoriques, UMR CNRS 7019, 1 Boulevard Arago, Metz F-57078, France
| | - Jean-Charles Boisson
- CReSTIC EA 3804, Université de Reims Champagne-Ardenne, Moulin de la Housse, Reims Cedex 02 BP39, F-51687, France
| | - Giancarlo Terraneo
- Laboratory of Supramolecular and Bio-Nanomaterials (SupraBioNanoLab), Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico di Milano, Via L. Mancinelli 7, Milan I-20131, Italy
| | - Eric Hénon
- Institut de Chimie Moléculaire de Reims UMR CNRS 7312, Université de Reims Champagne-Ardenne, Moulin de la Housse, Reims Cedex 02 BP39, F-51687, France
| | - Alessandro Genoni
- Université de Lorraine & CNRS, Laboratoire de Physique et Chimie Théoriques, UMR CNRS 7019, 1 Boulevard Arago, Metz F-57078, France
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Khartabil H, Doudet L, Allart-Simon I, Ponce-Vargas M, Gérard S, Hénon E. Mechanistic insights into Smiles rearrangement. Focus on π-π stacking interactions along the radical cascade. Org Biomol Chem 2020; 18:6840-6848. [PMID: 32845268 DOI: 10.1039/d0ob01511c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The synthesis of new arene and heteroarene scaffolds of therapeutic interest has generated a renewed interest in the domino radical cyclisation-Smiles. In this work we present a detailed mechanistic investigation of the radical version of a cascade involving a desulfonative Smiles rearrangement on an aromatic ring bearing a sulfonamide linker. Competing routes have been explored to characterize the molecular mechanism of the studied reaction. The knowledge gained from previous experimental observations is explained through the energy profile obtained by means of quantum mechanical calculations. This study answers questions about the rate determining step and the type of mechanism involved (two-step or concerted). Supplementary rate constant calculations as well as quantum molecular dynamics support experimental observations. An IGM-δg analysis performed along the reaction path unveils and quantifies an intramolecular π-π stacking interaction accelerating the reaction. This novel post processing IGM-δg tool based on the electron density, turns out to be useful to monitor and quantify specific intramolecular weak interactions along a reaction path from wave functions. From this mechanistic investigation it turns out that Smiles rearrangement here takes place in two steps rather than in a direct intramolecular radical substitution. Furthermore, we show that chain length effects must be taken into account in the functionalization of new sulfonylated derivatives subjected to this radical cascade, given their influence in the reaction rate.
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Affiliation(s)
- Hassan Khartabil
- Institut de Chimie Moléculaire de Reims UMR CNRS 7312, Université de Reims Champagne-Ardenne, Moulin de la Housse 51687, Reims Cedex 02 BP39, France.
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Abstract
The covalent chemical bond is intimately linked to electron sharing between atoms. The recent independent gradient model (IGM) and its δg descriptor provide a way to quantify locally this electron density interpenetration from wavefunction calculations. Each bond has its own IGM-δgpair signature. The present work establishes for the first time a strong link between this bond signature and the physically grounded bond force constant concept. Analyzing a large set of compounds and bonds, the intrinsic bond strength index (IBSI) emerges from the IGM formulation. Our study shows that the IBSI does not belong to the class of conventional bond orders (like Mulliken, Wiberg, Mayer, delocalization index, or electron localization function-ELF), but is rather a new complementary index, related to the bond strength. A fundamental outcome of this research is a novel index allowing to range all two-center chemical bonds by their intrinsic strength in molecular situation. We believe that the IBSI is a powerful and robust tool for interpretation accessible to a wide community of chemists (organic, inorganic chemistry, including transition-metal complexes and reaction mechanisms).
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Affiliation(s)
- Johanna Klein
- Institut de Chimie Moléculaire de Reims UMR CNRS 7312, Université de Reims Champagne-Ardenne, Moulin de la Housse, 51687 Reims Cedex 02 BP39, France
| | - Hassan Khartabil
- Institut de Chimie Moléculaire de Reims UMR CNRS 7312, Université de Reims Champagne-Ardenne, Moulin de la Housse, 51687 Reims Cedex 02 BP39, France
| | - Jean-Charles Boisson
- CReSTIC EA 3804, Université de Reims Champagne-Ardenne, Moulin de la Housse, 51687 Reims Cedex 02 BP39, France
| | - Julia Contreras-García
- Laboratoire de Chimie Théorique and UMR CNRS 7616, Sorbonne Université, 4 Pl Jussieu, 75252 Paris Cedex 05, France
| | - Jean-Philip Piquemal
- Laboratoire de Chimie Théorique and UMR CNRS 7616, Sorbonne Université, 4 Pl Jussieu, 75252 Paris Cedex 05, France.,Institut Universitaire de France, 75005 Paris, France
| | - Eric Hénon
- Institut de Chimie Moléculaire de Reims UMR CNRS 7312, Université de Reims Champagne-Ardenne, Moulin de la Housse, 51687 Reims Cedex 02 BP39, France
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Ponce-Vargas M, Lefebvre C, Boisson JC, Hénon E. Atomic Decomposition Scheme of Noncovalent Interactions Applied to Host–Guest Assemblies. J Chem Inf Model 2019; 60:268-278. [DOI: 10.1021/acs.jcim.9b01016] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Miguel Ponce-Vargas
- Institut de Chimie Moléculaire de Reims UMR CNRS 7312, Université de Reims Champagne-Ardenne, Moulin de la Housse, 51687 Reims Cedex 02 BP39, France
| | - Corentin Lefebvre
- Institut de Chimie Moléculaire de Reims UMR CNRS 7312, Université de Reims Champagne-Ardenne, Moulin de la Housse, 51687 Reims Cedex 02 BP39, France
| | - Jean-Charles Boisson
- CRESTIC EA 3804, Université de Reims Champagne-Ardenne, Moulin de la Housse, 51687 Reims Cedex 02 BP39, France
| | - Eric Hénon
- Institut de Chimie Moléculaire de Reims UMR CNRS 7312, Université de Reims Champagne-Ardenne, Moulin de la Housse, 51687 Reims Cedex 02 BP39, France
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Lefebvre C, Khartabil H, Boisson JC, Contreras-García J, Piquemal JP, Hénon E. The Independent Gradient Model: A New Approach for Probing Strong and Weak Interactions in Molecules from Wave Function Calculations. Chemphyschem 2018; 19:724-735. [PMID: 29250908 DOI: 10.1002/cphc.201701325] [Citation(s) in RCA: 162] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Indexed: 11/08/2022]
Abstract
Extraction of the chemical interaction signature from local descriptors based on electron density (ED) is still a fruitful field of development in chemical interpretation. In a previous work that used promolecular ED (frozen ED), the new descriptor, δg , was defined. It represents the difference between a virtual upper limit of the ED gradient (∇ρIGM , IGM=independent gradient model) that represents a noninteracting system and the true ED gradient (∇ρ ). It can be seen as a measure of electron sharing brought by ED contragradience. A compelling feature of this model is to provide an automatic workflow that extracts the signature of interactions between selected groups of atoms. As with the noncovalent interaction (NCI) approach, it provides chemists with a visual understanding of the interactions present in chemical systems. ∇ρIGM is achieved simply by using absolute values upon summing the individual gradient contributions that make up the total ED gradient. Hereby, we extend this model to relaxed ED calculated from a wave function. To this end, we formulated gradient-based partitioning (GBP) to assess the contribution of each orbital to the total ED gradient. We highlight these new possibilities across two prototypical examples of organic chemistry: the unconventional hexamethylbenzene dication, with a hexa-coordinated carbon atom, and β-thioaminoacrolein. It will be shown how a bond-by-bond picture can be obtained from a wave function, which opens the way to monitor specific interactions along reaction paths.
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Affiliation(s)
- Corentin Lefebvre
- Institut de Chimie Moléculaire de Reims UMR CNRS 7312, University of Reims Champagne-Ardenne, Moulin de la Housse, 51687, Reims Cedex 2 BP 39, France
| | - Hassan Khartabil
- Institut de Chimie Moléculaire de Reims UMR CNRS 7312, University of Reims Champagne-Ardenne, Moulin de la Housse, 51687, Reims Cedex 2 BP 39, France.,Campus Universitaire des Ardennes, University of Reims Champagne-Ardenne, 4 Bd Jean Delautre, 08000, Charleville-Mézières, France
| | - Jean-Charles Boisson
- CReSTIC EA 3804, University of Reims Champagne-Ardenne, Moulin de la Housse, 51687, Reims Cedex 2 BP 39, France
| | - Julia Contreras-García
- Sorbonne Universités, UPMC, Laboratoire de Chimie Théorique and CNRS UMR CNRS 7616, 4 Pl Jussieu, 75252, Paris Cedex 05, France
| | - Jean-Philip Piquemal
- Sorbonne Universités, UPMC, Laboratoire de Chimie Théorique and CNRS UMR CNRS 7616, 4 Pl Jussieu, 75252, Paris Cedex 05, France
| | - Eric Hénon
- Institut de Chimie Moléculaire de Reims UMR CNRS 7312, University of Reims Champagne-Ardenne, Moulin de la Housse, 51687, Reims Cedex 2 BP 39, France
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Barberot C, Moniot A, Allart-Simon I, Malleret L, Yegorova T, Laronze-Cochard M, Bentaher A, Médebielle M, Bouillon JP, Hénon E, Sapi J, Velard F, Gérard S. Synthesis and biological evaluation of pyridazinone derivatives as potential anti-inflammatory agents. Eur J Med Chem 2018; 146:139-146. [PMID: 29407945 DOI: 10.1016/j.ejmech.2018.01.035] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 01/10/2018] [Accepted: 01/11/2018] [Indexed: 12/28/2022]
Abstract
Cyclic nucleotide phosphodiesterase type 4 (PDE4), that controls intracellular level of cyclic nucleotide cAMP, has aroused scientific attention as a suitable target for anti-inflammatory therapy in respiratory diseases. Here we describe the development of two families of pyridazinone derivatives as potential PDE4 inhibitors and their evaluation as anti-inflammatory agents. Among these derivatives, 4,5-dihydropyridazinone representatives possess promising activity, selectivity towards PDE4 isoenzymes and are able to reduce IL-8 production by human primary polymorphonuclear cells.
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Affiliation(s)
- Chantal Barberot
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), UMR CNRS 7312, UFR Sciences, Moulin de La Housse and UFR Pharmacie, 51 Rue Cognacq-Jay, 51096 Reims, France
| | - Aurélie Moniot
- Université de Reims-Champagne-Ardenne, EA 4691 Biomatériaux & Inflammation en Site OSseux (BIOS), SFR CAP-Santé (FED 4231), UFR Pharmacie and UFR Odontologie, 51 Rue Cognacq-Jay, 51096 Reims, France
| | - Ingrid Allart-Simon
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), UMR CNRS 7312, UFR Sciences, Moulin de La Housse and UFR Pharmacie, 51 Rue Cognacq-Jay, 51096 Reims, France
| | - Laurette Malleret
- Centre International de Recherche en Infectiologie (CIRI), EA7426, Faculté de Médecine Lyon-Sud, 165 Chemin Du Grand Revoyet, 69921 Oullins, France
| | - Tatiana Yegorova
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000 Rouen, France
| | - Marie Laronze-Cochard
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), UMR CNRS 7312, UFR Sciences, Moulin de La Housse and UFR Pharmacie, 51 Rue Cognacq-Jay, 51096 Reims, France
| | - Abderrazzaq Bentaher
- Centre International de Recherche en Infectiologie (CIRI), EA7426, Faculté de Médecine Lyon-Sud, 165 Chemin Du Grand Revoyet, 69921 Oullins, France
| | - Maurice Médebielle
- Univ Lyon, Université Lyon 1, CNRS, INSA, CPE-Lyon, ICBMS, UMR 5246, 43 Bd Du 11 Novembre 1918, 69622 Villeurbanne, France
| | | | - Eric Hénon
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), UMR CNRS 7312, UFR Sciences, Moulin de La Housse and UFR Pharmacie, 51 Rue Cognacq-Jay, 51096 Reims, France
| | - Janos Sapi
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), UMR CNRS 7312, UFR Sciences, Moulin de La Housse and UFR Pharmacie, 51 Rue Cognacq-Jay, 51096 Reims, France
| | - Frédéric Velard
- Université de Reims-Champagne-Ardenne, EA 4691 Biomatériaux & Inflammation en Site OSseux (BIOS), SFR CAP-Santé (FED 4231), UFR Pharmacie and UFR Odontologie, 51 Rue Cognacq-Jay, 51096 Reims, France
| | - Stéphane Gérard
- Université de Reims Champagne-Ardenne, Institut de Chimie Moléculaire de Reims (ICMR), UMR CNRS 7312, UFR Sciences, Moulin de La Housse and UFR Pharmacie, 51 Rue Cognacq-Jay, 51096 Reims, France.
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15
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Previtali V, Trujillo C, Boisson JC, Khartabil H, Hénon E, Rozas I. Development of the first model of a phosphorylated, ATP/Mg 2+-containing B-Raf monomer by molecular dynamics simulations: a tool for structure-based design. Phys Chem Chem Phys 2017; 19:31177-31185. [PMID: 29139502 DOI: 10.1039/c7cp05038k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A model of phosphorylated and ATP-containing B-Raf protein kinase is needed as a tool for the structure-based design of new allosteric inhibitors, since no crystal structure of such a system has been resolved. Here, we present the development of such a model as well as a thorough analysis of its structural features. This model was prepared using a systematic molecular dynamics approach considering the presence or absence of both the phosphate group at the Thr599 site and the ATP molecule. Then, different structural features (i.e. DFG motif, Mg2+ binding loop, activation loop, phosphorylation site and αC-helix region) were analysed for each trajectory to validate the aimed 2pBRAF_ATP model. Moreover, the structure and activating interactions of this 2pBRAF_ATP model were found to be in agreement with previously reported information. Finally, the model was further validated by means of a molecular docking study with our previously developed lead compound I confirming that this ATP-containing, phosphorylated protein model is suitable for further structure-based design studies.
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Affiliation(s)
- Viola Previtali
- School of Chemistry Trinity Biomedical Sciences Institute, Trinity College Dublin, 152-160 Pearse Street, Dublin 2, Ireland.
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16
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Lefebvre C, Rubez G, Khartabil H, Boisson JC, Contreras-García J, Hénon E. Accurately extracting the signature of intermolecular interactions present in the NCI plot of the reduced density gradient versus electron density. Phys Chem Chem Phys 2017; 19:17928-17936. [PMID: 28664951 DOI: 10.1039/c7cp02110k] [Citation(s) in RCA: 664] [Impact Index Per Article: 94.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An electron density (ED)-based methodology is developed for the automatic identification of intermolecular interactions using pro-molecular density. The expression of the ED gradient in terms of atomic components furnishes the basis for the Independent Gradient Model (IGM). This model leads to a density reference for non interacting atoms/fragments where the atomic densities are added whilst their interaction turns off. Founded on this ED reference function that features an exponential decay also in interference regions, IGM model provides a way to identify and quantify the net ED gradient attenuation due to interactions. Using an intra/inter uncoupling scheme, a descriptor (δginter) is then derived that uniquely defines intermolecular interaction regions. An attractive feature of the IGM methodology is to provide a workflow that automatically generates data composed solely of intermolecular interactions for drawing the corresponding 3D isosurface representations.
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Affiliation(s)
- Corentin Lefebvre
- Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, University of Reims Champagne-Ardenne, BP 1039, 51687 Reims, France.
| | - Gaëtan Rubez
- Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, University of Reims Champagne-Ardenne, BP 1039, 51687 Reims, France. and CReSTIC EA 3804, University of Reims Champagne-Ardenne, 51687 Reims, France and ATOS Company, 1 rue de Provence, 38130 Echirolles, France
| | - Hassan Khartabil
- Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, University of Reims Champagne-Ardenne, BP 1039, 51687 Reims, France. and Campus Universitaire des Ardennes, 4 bd Jean Delautre, 08000 Charleville-Mézières, France
| | | | - Julia Contreras-García
- Sorbonne Universités, UPMC Univ Paris 06, UMR CNRS 7616, Laboratoire de Chimie Théorique, Paris, France and CNRS, UMR 7616, Laboratoire de Chimie Théorique, Paris, France
| | - Eric Hénon
- Institut de Chimie Moléculaire de Reims, CNRS UMR 7312, University of Reims Champagne-Ardenne, BP 1039, 51687 Reims, France.
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17
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Rubez G, Etancelin JM, Vigouroux X, Krajecki M, Boisson JC, Hénon E. GPU accelerated implementation of NCI calculations using promolecular density. J Comput Chem 2017; 38:1071-1083. [DOI: 10.1002/jcc.24786] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Revised: 02/10/2017] [Accepted: 02/14/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Gaëtan Rubez
- Parallel Computing division; ATOS Company; 1 rue de Provence Echirolles 38130 France
- Departmant of Computer Science; CReSTIC (Centre de Recherche en STIC) EA3804, University of Reims Champagne-Ardenne; Moulin de la Housse Reims 51687 France
- Department of Chemistry; ICMR, UMR CNRS 7312, University of Reims Champagne-Ardenne; Moulin de la Housse Reims 51687 France
| | - Jean-Matthieu Etancelin
- Departmant of Computer Science; CReSTIC (Centre de Recherche en STIC) EA3804, University of Reims Champagne-Ardenne; Moulin de la Housse Reims 51687 France
| | - Xavier Vigouroux
- Parallel Computing division; ATOS Company; 1 rue de Provence Echirolles 38130 France
| | - Michael Krajecki
- Departmant of Computer Science; CReSTIC (Centre de Recherche en STIC) EA3804, University of Reims Champagne-Ardenne; Moulin de la Housse Reims 51687 France
| | - Jean-Charles Boisson
- Departmant of Computer Science; CReSTIC (Centre de Recherche en STIC) EA3804, University of Reims Champagne-Ardenne; Moulin de la Housse Reims 51687 France
| | - Eric Hénon
- Department of Chemistry; ICMR, UMR CNRS 7312, University of Reims Champagne-Ardenne; Moulin de la Housse Reims 51687 France
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18
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Haschka T, Hénon E, Jaillet C, Martiny L, Etchebest C, Dauchez M. Direct minimization: Alternative to the traditional L2 norm to derive partial atomic charges. COMPUT THEOR CHEM 2015. [DOI: 10.1016/j.comptc.2015.10.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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19
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Laurent X, Renault N, Farce A, Chavatte P, Hénon E. Relationships between Th1 or Th2 iNKT cell activity and structures of CD1d-antigen complexes: meta-analysis of CD1d-glycolipids dynamics simulations. PLoS Comput Biol 2014; 10:e1003902. [PMID: 25376021 PMCID: PMC4222593 DOI: 10.1371/journal.pcbi.1003902] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2014] [Accepted: 08/22/2014] [Indexed: 01/17/2023] Open
Abstract
A number of potentially bioactive molecules can be found in nature. In particular, marine organisms are a valuable source of bioactive compounds. The activity of an α-galactosylceramide was first discovered in 1993 via screening of a Japanese marine sponge (Agelas mauritanius). Very rapidly, a synthetic glycololipid analogue of this natural molecule was discovered, called KRN7000. Associated with the CD1d protein, this α-galactosylceramide 1 (KRN7000) interacts with the T-cell antigen receptor to form a ternary complex that yields T helper (Th) 1 and Th2 responses with opposing effects. In our work, we carried out molecular dynamics simulations (11.5 µs in total) involving eight different ligands (conducted in triplicate) in an effort to find out correlation at the molecular level, if any, between chemical modulation of 1 and the orientation of the known biological response, Th1 or Th2. Comparative investigations of human versus mouse and Th1 versus Th2 data have been carried out. A large set of analysis tools was employed including free energy landscapes. One major result is the identification of a specific conformational state of the sugar polar head, which could be correlated, in the present study, to the biological Th2 biased response. These theoretical tools provide a structural basis for predicting the very different dynamical behaviors of α-glycosphingolipids in CD1d and might aid in the future design of new analogues of 1.
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Affiliation(s)
- Xavier Laurent
- Intestinal Biotech Development, Faculté de Médecine, Lille, France
- Laboratoire de Chimie Thérapeutique EA4481, Université Lille 2, Lille, France
| | - Nicolas Renault
- Laboratoire de Chimie Thérapeutique EA4481, Université Lille 2, Lille, France
| | - Amaury Farce
- Laboratoire de Chimie Thérapeutique EA4481, Université Lille 2, Lille, France
| | - Philippe Chavatte
- Laboratoire de Chimie Thérapeutique EA4481, Université Lille 2, Lille, France
- Institut de Chimie Pharmaceutique Albert Lespagnol EA4481, Université Lille 2, Lille, France
| | - Eric Hénon
- Institut de Chimie Moléculaire de Reims UMR CNRS 7312, University of Reims Champagne-Ardenne, Reims, France
- * E-mail:
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20
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Langeron J, Blondel A, Sayen S, Hénon E, Couderchet M, Guillon E. Molecular properties affecting the adsorption coefficient of pesticides from various chemical families. Environ Sci Pollut Res Int 2014; 21:9727-9741. [PMID: 24801285 DOI: 10.1007/s11356-014-2916-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Accepted: 04/15/2014] [Indexed: 06/03/2023]
Abstract
Forty pesticides were selected in function of their chemical families and their physico-chemical properties to represent a wide range of pesticide properties. Adsorption of these pesticides was studied on two soils by batch experiments. The two soils differed largely in organic matter and calcite contents. Distribution coefficient Kd was determined for each pesticide on the two soils. Adsorption was higher for the soil having the highest organic matter content and the lowest calcite content. In order to identify pesticide properties governing retention, eight molecular descriptors were determined from three-dimensional (3D) structure of molecules. Class-specific quantitative structure properties relationship (QSPR) soil adsorption models using one and two parameters were developed from experimental Kd. Three properties seemed to influence most retention of pesticides: hydrophobicity, solubility, and polarisability. Models combining these properties were suggested and discussed.
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Affiliation(s)
- Julie Langeron
- Institut de Chimie Moléculaire de Reims (ICMR, UMR CNRS 7312), Groupe Chimie de Coordination, Université de Reims Champagne-Ardenne, BP 1039, 51687, Reims Cedex 2, France
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21
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Laurent X, Bertin B, Renault N, Farce A, Speca S, Milhomme O, Millet R, Desreumaux P, Hénon E, Chavatte P. Switching Invariant Natural Killer T (iNKT) Cell Response from Anticancerous to Anti-Inflammatory Effect: Molecular Bases. J Med Chem 2014; 57:5489-508. [DOI: 10.1021/jm4010863] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Xavier Laurent
- Faculté
de Médecine, Intestinal Biotech Development, Amphis J et K, Boulevard du Professeur Jules Leclerc, 59045 Lille Cedex, France
- Laboratoire
de Chimie Thérapeutique, EA 4481, Faculté des Sciences
Pharmaceutiques et Biologiques, Université Lille-Nord de France, 3 Rue du Professeur Laguesse, BP 83, 59006 Lille Cedex, France
| | - Benjamin Bertin
- Faculté
de
Médecine, Université Lille-Nord de France, Amphis J
et K, INSERM U995, Boulevard du Professeur
Jules Leclerc, 59045 Lille Cedex, France
| | - Nicolas Renault
- Laboratoire
de Chimie Thérapeutique, EA 4481, Faculté des Sciences
Pharmaceutiques et Biologiques, Université Lille-Nord de France, 3 Rue du Professeur Laguesse, BP 83, 59006 Lille Cedex, France
| | - Amaury Farce
- Laboratoire
de Chimie Thérapeutique, EA 4481, Faculté des Sciences
Pharmaceutiques et Biologiques, Université Lille-Nord de France, 3 Rue du Professeur Laguesse, BP 83, 59006 Lille Cedex, France
| | - Silvia Speca
- Faculté
de
Médecine, Université Lille-Nord de France, Amphis J
et K, INSERM U995, Boulevard du Professeur
Jules Leclerc, 59045 Lille Cedex, France
| | - Ophélie Milhomme
- Institut
de Chimie Pharmaceutique Albert Lespagnol, EA 4481, Université Lille-Nord de France, 3 Rue du Professeur Laguesse, BP 83, 59006 Lille Cedex, France
| | - Régis Millet
- Institut
de Chimie Pharmaceutique Albert Lespagnol, EA 4481, Université Lille-Nord de France, 3 Rue du Professeur Laguesse, BP 83, 59006 Lille Cedex, France
| | - Pierre Desreumaux
- Faculté
de
Médecine, Université Lille-Nord de France, Amphis J
et K, INSERM U995, Boulevard du Professeur
Jules Leclerc, 59045 Lille Cedex, France
| | - Eric Hénon
- Université
de Reims Champagne-Ardenne, UFR des Sciences Exactes et Naturelles,
BSMA-ICMR, UMR CNRS 6229, Moulin de
la Housse, BP 1039, 51687 Reims Cedex 2, France
| | - Philippe Chavatte
- Laboratoire
de Chimie Thérapeutique, EA 4481, Faculté des Sciences
Pharmaceutiques et Biologiques, Université Lille-Nord de France, 3 Rue du Professeur Laguesse, BP 83, 59006 Lille Cedex, France
- Institut
de Chimie Pharmaceutique Albert Lespagnol, EA 4481, Université Lille-Nord de France, 3 Rue du Professeur Laguesse, BP 83, 59006 Lille Cedex, France
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Barberot C, Boisson J, Gérard S, Khartabil H, Thiriot E, Monard G, Hénon E. AlgoGen: A tool coupling a linear-scaling quantum method with a genetic algorithm for exploring non-covalent interactions. COMPUT THEOR CHEM 2014. [DOI: 10.1016/j.comptc.2013.11.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Blondel A, Langeron J, Sayen S, Hénon E, Couderchet M, Guillon E. Molecular properties affecting the adsorption coefficient of phenylurea herbicides. Environ Sci Pollut Res Int 2013; 20:6266-6281. [PMID: 23589246 DOI: 10.1007/s11356-013-1654-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2013] [Accepted: 03/15/2013] [Indexed: 06/02/2023]
Abstract
The adsorption of 12 pesticides of the phenylurea family was studied by batch experiments in order to determine the adsorption coefficient, K d. The study was conducted in two soils chosen for their differences in organic matter and calcite contents. K d pesticide adsorption coefficients were higher for soil S1 than for soil S2 due to the presence of a higher organic matter content and a lower calcite content in soil S1. To identify pesticide properties governing retention, 18 molecular descriptors were considered. Class-specific quantitative structure-property relationship (QSPR) soil sorption models using one, two, and three descriptors were developed from our experimental data using linear regressions. One of the aims of this work was to check whether QSPR models that did not include literature values of K ow were able to predict K d coefficients in satisfactory agreement with our experimental data. The influence of the level of theory in determining K ow and polarisability predictors on the predictive performance of the model was also examined by comparing quantum chemistry and empirical (QikProp) approaches. The one-descriptor model using "quantum" polarisability α was found to perform almost as well as or better than the other models.
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Affiliation(s)
- Alodie Blondel
- Institut de Chimie Moléculaire de Reims (ICMR, UMR CNRS 7312), Groupe Chimie de Coordination, Université de Reims Champagne-Ardenne, BP 1039, 51687, Reims Cedex 2, France
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Banchet-Cadeddu A, Hénon E, Dauchez M, Renault JH, Monneaux F, Haudrechy A. The stimulating adventure of KRN 7000. Org Biomol Chem 2011; 9:3080-104. [DOI: 10.1039/c0ob00975j] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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25
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Martinez A, Hénon E, Coiffier C, Banchet A, Harakat D, Nuzillard JM, Haudrechy A. An unexpected rearrangement giving a new thiosubstituted carbohydrate. Carbohydr Res 2010; 345:1088-93. [DOI: 10.1016/j.carres.2010.03.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Revised: 03/16/2010] [Accepted: 03/18/2010] [Indexed: 11/24/2022]
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Accadbled F, Tinant B, Hénon E, Carrez D, Croisy A, Bouquillon S. Synthesis of chiral β-aminoalcohol palladium complexes exhibiting cytotoxic properties. Dalton Trans 2010; 39:8982-93. [DOI: 10.1039/c0dt00328j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Abstract
Based on recent detailed quantum mechanical computations of the mechanism of the title reaction and, this paper presents kinetics analysis of the overall rate constant and its temperature dependence, for which ample experimental data are available for comparison. The analysis confirms that the principal channel is the formation of acetonyl radical + H(2)O, while the channel leading to acetic acid is of negligible importance. It is shown that the unusual temperature dependence of the overall rate constant, as observed experimentally, is well accounted for by standard RRKM treatment that includes tunneling. This treatment is applied at the microcanonical level, with chemically activated distribution of entrance species, i.e. using a stationary rather than a thermal distribution that incorporates collisional energy transfer and competition between the redissociation and exit channel. A similar procedure is applied to the isotopic reaction acetone-d6 + OH with equally satisfying results, so that the experimental temperature dependence of the KIE (kinetic isotope effect) is perfectly reproduced. This very good agreement between calculation and experiment is obtained without any fitting to experimental values and without any adjustment of the parameters of calculation.
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Affiliation(s)
- Françoise Caralp
- Laboratoire de Physicochimie Moléculaire, UMR 5803 CNRS, Université Bordeaux I, 33405, Talence Cedex, France
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Thiriot E, Canneaux S, Hénon E, Bohr F. Theoretical study of the reactivity of hydrocarbon and oxygenated alkoxy radicals: comparison of the isomerization and the b-c-h bond dissociation pathways. ACTA ACUST UNITED AC 2005. [DOI: 10.1007/s11144-005-0251-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Gomez N, Hénon E, Bohr F, Devolder P. Rate Constants for the Reactions of CH3O with Cyclohexane, Cyclohexene, and 1,4-Cyclohexadiene: Variable Temperature Experiments and Theoretical Comparison of Addition and H-Abstraction Channels. J Phys Chem A 2001. [DOI: 10.1021/jp010204h] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nathalie Gomez
- Laboratoire de Physico-chimie des Processus de Combustion, UMR CNRS 8522, Centre d'Etudes et de Recherches Lasers et Applications, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq Cedex, France, and Groupe de Spectroscopie Moléculaire et Atmosphérique, Laboratoire de Chimie-physique, UMR CNRS 6089, Faculté des Sciences, Université de Reims ChampagneArdenne, Moulin de la Housse BP 1039, 51687 Reims Cedex 2, France
| | - Eric Hénon
- Laboratoire de Physico-chimie des Processus de Combustion, UMR CNRS 8522, Centre d'Etudes et de Recherches Lasers et Applications, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq Cedex, France, and Groupe de Spectroscopie Moléculaire et Atmosphérique, Laboratoire de Chimie-physique, UMR CNRS 6089, Faculté des Sciences, Université de Reims ChampagneArdenne, Moulin de la Housse BP 1039, 51687 Reims Cedex 2, France
| | - Frédéric Bohr
- Laboratoire de Physico-chimie des Processus de Combustion, UMR CNRS 8522, Centre d'Etudes et de Recherches Lasers et Applications, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq Cedex, France, and Groupe de Spectroscopie Moléculaire et Atmosphérique, Laboratoire de Chimie-physique, UMR CNRS 6089, Faculté des Sciences, Université de Reims ChampagneArdenne, Moulin de la Housse BP 1039, 51687 Reims Cedex 2, France
| | - Pascal Devolder
- Laboratoire de Physico-chimie des Processus de Combustion, UMR CNRS 8522, Centre d'Etudes et de Recherches Lasers et Applications, Université des Sciences et Technologies de Lille, 59655 Villeneuve d'Ascq Cedex, France, and Groupe de Spectroscopie Moléculaire et Atmosphérique, Laboratoire de Chimie-physique, UMR CNRS 6089, Faculté des Sciences, Université de Reims ChampagneArdenne, Moulin de la Housse BP 1039, 51687 Reims Cedex 2, France
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