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Pallova L, Gauthier ES, Abella L, Jean M, Vanthuyne N, Dorcet V, Vendier L, Autschbach J, Crassous J, Bastin S, César V. Synthesis and Properties of Partially Saturated Fluorenyl-Derived [n]Helicenes Featuring an Overcrowded Alkene. Chemistry 2021; 27:7722-7730. [PMID: 33780559 DOI: 10.1002/chem.202100150] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Indexed: 01/25/2023]
Abstract
The straightforward, multigram-scale synthesis of the partially saturated H6 -fluoreno[n]helicenes (n=5 or 7) featuring a central, overcrowded alkene is described. The key cyclization step was based on an intramolecular McMurry reaction from the corresponding 1,5-diketones. Chiral stationary phase HPLC analysis and isomer separation indicate that each helicenic compound is constituted of three diastereoisomers at room temperature, i. e. the configurationally stable (R,R,P)/(S,S,M) pair of enantiomers and an apparently achiral compound resulting from the rapid interconversion between the (R,S,P) and (S,R,M) enantiomers. The partially saturated H6 -fluoreno[n]helicenes are oxidatively aromatized to give an efficient access to the corresponding fluoreno[n]helicenes. The chiroptical properties (vibrational and electronic circular dichroism) of the chiral, enantiopure compounds have been measured and analyzed by quantum-chemical calculations, confirming their helicoidal nature.
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Specklin D, Coffinet A, Vendier L, del Rosal I, Dinoi C, Simonneau A. Synthesis, Characterization, and Comparative Theoretical Investigation of Dinitrogen-Bridged Group 6-Gold Heterobimetallic Complexes. Inorg Chem 2021; 60:5545-5562. [PMID: 33724789 PMCID: PMC8058778 DOI: 10.1021/acs.inorgchem.0c03271] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Indexed: 01/21/2023]
Abstract
We have prepared and characterized a series of unprecedented group 6-group 11, N2-bridged, heterobimetallic [ML4(η1-N2)(μ-η1:η1-N2)Au(NHC)]+ complexes (M = Mo, W, L2 = diphosphine) by treatment of trans-[ML4(N2)2] with a cationic gold(I) complex [Au(NHC)]+. The adducts are very labile in solution and in the solid, especially in the case of molybdenum, and decomposition pathways are likely initiated by electron transfers from the zerovalent group 6 atom to gold. Spectroscopic and structural parameters point to the fact that the gold adducts are very similar to Lewis pairs formed out of strong main-group Lewis acids (LA) and low-valent, end-on dinitrogen complexes, with a bent M-N-N-Au motif. To verify how far the analogy goes, we computed the electronic structures of [W(depe)2(η1-N2)(μ-η1:η1-N2)AuNHC]+ (10W+) and [W(depe)2(η1-N2)(μ-η1:η1-N2)B(C6F5)3] (11W). A careful analysis of the frontier orbitals of both compounds shows that a filled orbital resulting from the combination of the π* orbital of the bridging N2 with a d orbital of the group 6 metal overlaps in 10W+ with an empty sd hybrid orbital at gold, whereas in 11W with an sp3 hybrid orbital at boron. The bent N-N-LA arrangement maximizes these interactions, providing a similar level of N2 "push-pull" activation in the two compounds. In the gold case, the HOMO-2 orbital is further delocalized to the empty carbenic p orbital, and an NBO analysis suggests an important electrostatic component in the μ-N2-[Au(NHC)]+ bond.
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Queyriaux N, Esmieu C, Gupta AK, Vendier L, Ott S, Orio M, Hammarström L. Electrochemical, Spectroscopic, and Computational Investigation of a Series of Polypyridyl Ruthenium(II) Complexes: Characterization of Reduced States. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202001165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ayyappan R, Coppel Y, Vendier L, Ghosh S, Sabo-Etienne S, Bontemps S. Synthesis and reactivity of phosphine borohydride compounds. Chem Commun (Camb) 2021; 57:375-378. [PMID: 33325466 DOI: 10.1039/d0cc07072f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Four lithium phosphine borohydride compounds featuring phenyl and naphthyl linkers have been synthesized. In-depth NMR analysis affords evidence for non-bonded through space P-B coupling. Reactivity towards CO2 leads to LiH transfer and to the quantitative formation of the corresponding ambiphilic phosphine-borane products.
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Coffinet A, Zhang D, Vendier L, Bontemps S, Simonneau A. Borane-catalysed dinitrogen borylation by 1,3-B-H bond addition. Dalton Trans 2021; 50:5582-5589. [PMID: 33908973 DOI: 10.1039/d1dt00317h] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The borylation of ligated dinitrogen by 1,3-B-H bond addition over a W-N[triple bond, length as m-dash]N unit using various hydroboranes has been examined. In a previous study, we have shown that Piers' borane (1) reacted with the tungsten dinitrogen complex 2 to afford a boryldiazenido-hydrido-tungsten species. The ease and mildness of this reaction have encouraged us to extend its scope, with the working hypothesis that 1 could potentially catalyse the 1,3-B-H bond addition of other hydroboranes. Under productive reaction conditions, dicyclohexylborane (HBCy2) and diisopinocampheylborane (HBIpc2) underwent retro-hydroboration to give cyclohexylborane (H2BCy) or isopinocampheylborane (H2BIpc), respectively; these monoalkylboranes act as N2-borylating agents in the presence of a catalytic amount of 1. Under similar conditions, 9-borabicyclononane (9-BBN) slowly adds over the W-N[triple bond, length as m-dash]N unit without rearrangement to a monoalkylborane. Catecholborane (HBcat) undergoes the 1,3-B-H bond addition without the need for a catalyst. We were not able to build more than one covalent B-N bond between the terminal N of the N2 ligand and the boron reagent with this methodology.
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Azouzi K, Bruneau-Voisine A, Vendier L, Sortais JB, Bastin S. Asymmetric transfer hydrogenation of ketones promoted by manganese(I) pre-catalysts supported by bidentate aminophosphines. CATAL COMMUN 2020. [DOI: 10.1016/j.catcom.2020.106040] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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Romero N, Dufrois Q, Crespo N, Pujol A, Vendier L, Etienne M. Regioselective C–F Bond Activation/C–C Bond Formation between Fluoropyridines and Cyclopropyl Groups at Zirconium. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00218] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Bouammali A, Bijani C, Vendier L, Etienne M, Simonneau A. Reaction of Methyllithium with Group 6 Phosphine Dinitrogen Complexes. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.201901346] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Puyo M, Lebon E, Vendier L, Kahn ML, Fau P, Fajerwerg K, Lepetit C. Topological Analysis of Ag-Ag and Ag-N Interactions in Silver Amidinate Precursor Complexes of Silver Nanoparticles. Inorg Chem 2020; 59:4328-4339. [PMID: 32157877 DOI: 10.1021/acs.inorgchem.9b03166] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of silver amidinate complexes has been studied both experimentally and theoretically, in order to investigate the role of the precursor complex in the control of the synthesis of silver nanoparticles via an organometallic route. The replacement of the methyl substituent of the central carbon atom of the amidinate anion by a n-butyl group allows for the crystallization of the tetranuclear silver amidinate complex 3 instead of a mixture of di- and trinuclear silver amidinate complexes 1 and 2, as obtained with a methyl substituent. The relative stabilities and dissociation schemes of various isomeric arrangements of silver atoms in 3 are investigated at the computational DFT level of calculation, depending on the substituents of the amidinate ligand. The tetranuclear silver amidinate complex 4, exhibiting a diamondlike arrangement of the four silver atoms, is also considered. Ag-N bonds and argentophilic Ag-Ag interactions are finely characterized using ELF and QTAIM topological analyses and compared over the series of the related di-, tri-, and tetranuclear silver amidinate complexes 1-4. In contrast to the Ag-N dative bonds very similar over the series, argentophilic Ag-Ag interactions of various strengths and covalence degree are characterized for complexes 1-4. This gives insight into the role of the amidinate substituents on the nuclearity and intramolecular chemical bonding of the silver amidinate precursors, required for the synthesis of dedicated AgNPs with chemically well defined surfaces.
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Costes J, Rodriguez Douton M, Shova S, Vendier L. Role of the Main and Auxiliary Ligands in the Nuclearity of Cu‐Ln Complexes. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.201901150] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Kireev NV, Filippov OA, Gulyaeva ES, Shubina ES, Vendier L, Canac Y, Sortais JB, Lugan N, Valyaev DA. Bis[diphenylphosphino]methane and its bridge-substituted analogues as chemically non-innocent ligands for H2 activation. Chem Commun (Camb) 2020; 56:2139-2142. [DOI: 10.1039/c9cc07713h] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Interconversion between coordinated diphosphinomethane and diphosphinomethanide moieties can be used as a new tool for metal–ligand cooperation.
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Li Y, Nguyen M, Baudoin M, Vendier L, Liu Y, Robert A, Meunier B. Why Is Tetradentate Coordination Essential for Potential Copper Homeostasis Regulators in Alzheimer's Disease? Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900951] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Coffinet A, Specklin D, Vendier L, Etienne M, Simonneau A. Frustrated Lewis Pair Chemistry Enables N
2
Borylation by Formal 1,3‐Addition of a B−H Bond in the Coordination Sphere of Tungsten. Chemistry 2019; 25:14300-14303. [DOI: 10.1002/chem.201904084] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Indexed: 11/06/2022]
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Benaissa I, Pallova L, Morantin ME, Lafitte T, Huynh M, Barthes C, Vendier L, Lugan N, Bastin S, César V. N-Heterocyclic Carbenes as Key Intermediates in the Synthesis of Fused, Mesoionic, Tricyclic Heterocycles. Chemistry 2019; 25:13030-13036. [PMID: 31385630 DOI: 10.1002/chem.201903242] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Indexed: 01/16/2023]
Abstract
Coupling between 5-bromoimidazo[1,5-a]pyridinium salts and malonate or arylacetate esters leads to a facile and straightforward access to the new mesoionic, fused, tricyclic system of imidazo[2,1,5-cd]indolizinium-3-olate. Mechanistic studies show that the reaction pathway consists of nucleophilic aromatic substitution on the cationic, bicyclic heterocycle by an enolate-type moiety and in the nucleophilic attack of a transient free N-heterocyclic carbene (NHC) species on the ester group; the relative order of these two steps depends on the nature of the starting ester. This work highlights the valuable implementation of free NHC species as key intermediates in synthetic chemistry, beyond their classical use as stabilizing ligands or organocatalysts.
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Zhang W, Huang D, Huang M, Huang J, Wang D, Liu X, Nguyen M, Vendier L, Mazères S, Robert A, Liu Y, Meunier B. Corrigendum: Preparation of Tetradentate Copper Chelators as Potential Anti‐Alzheimer Agents. ChemMedChem 2019; 14:1742. [DOI: 10.1002/cmdc.201900516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Parker KDJ, Labat S, Sotiropoulos J, Miqueu K, Pimienta V, Vendier L, Etienne M. Allyl Complexes of Tungsten from the Rearrangement of Transient Cyclopropyl Precursors. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900816] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Tang Y, Benaissa I, Huynh M, Vendier L, Lugan N, Bastin S, Belmont P, César V, Michelet V. Inside Cover: An Original L‐shape, Tunable N‐Heterocyclic Carbene Platform for Efficient Gold(I) Catalysis (Angew. Chem. Int. Ed. 24/2019). Angew Chem Int Ed Engl 2019. [DOI: 10.1002/anie.201905442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Tang Y, Benaissa I, Huynh M, Vendier L, Lugan N, Bastin S, Belmont P, César V, Michelet V. Innentitelbild: An Original L‐shape, Tunable N‐Heterocyclic Carbene Platform for Efficient Gold(I) Catalysis (Angew. Chem. 24/2019). Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Bas AC, Shalabaeva V, Thompson X, Vendier L, Salmon L, Thibault C, Molnár G, Routaboul L, Bousseksou A. Effects of solvent vapor annealing on the crystallinity and spin crossover properties of thin films of [Fe(HB(tz)3)2]. CR CHIM 2019. [DOI: 10.1016/j.crci.2019.03.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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45
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Tang Y, Benaissa I, Huynh M, Vendier L, Lugan N, Bastin S, Belmont P, César V, Michelet V. An Original L‐shape, Tunable N‐Heterocyclic Carbene Platform for Efficient Gold(I) Catalysis. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901090] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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46
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Tang Y, Benaissa I, Huynh M, Vendier L, Lugan N, Bastin S, Belmont P, César V, Michelet V. An Original L‐shape, Tunable N‐Heterocyclic Carbene Platform for Efficient Gold(I) Catalysis. Angew Chem Int Ed Engl 2019; 58:7977-7981. [DOI: 10.1002/anie.201901090] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Indexed: 12/11/2022]
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Corona-González MV, Zamora-Moreno J, Muñoz-Hernández MA, Vendier L, Sabo-Etienne S, Montiel-Palma V. Exploiting the Versatility of Phosphinobenzylsilanes for the Stabilization of 14-Electron Rhodium(III) and Iridium(III) Complexes. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900107] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Costes JP, Mallet-Ladeira S, Vendier L, Maurice R, Wernsdorfer W. Influence of ancillary ligands and solvents on the nuclearity of Ni-Ln complexes. Dalton Trans 2019; 48:3404-3414. [PMID: 30788479 DOI: 10.1039/c9dt00370c] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Schiff base ligand resulting from the reaction of ovanillin and 2,2-dimethyl-1,3-diaminopropane allows the preparation of hetero-dinuclear [Ni-Ln]3+ or -trinuclear [Ni-Ln-Ni]3+ complexes. Although empirical parameters for rationalizing the strength of the ferromagnetic Ni-Gd interaction have already been discussed in several papers, no systematic study has been devoted to the control of the nuclearity of such complexes. With the help of structural determinations, we demonstrate the role of solvent and of the nature of ancillary ligands, linked to the Ln ions, in nuclearity. For instance, the presence of one chelating nitrato ligand is already sufficient to impede an increase in the nuclearity, while the replacement of nitrato ligands by chloride anions still yields dinuclear Ni-Ln complexes. This experimental result evidences the role of protic solvents. In contrast, the use of lanthanide salts, soluble in non-protic solvents, allows the isolation of dinuclear [Ni-Ln]3+ or trinuclear cationic [LNi-Ln-NiL]3+ complexes, depending on the Ni/Ln ratio. A further synthetic step can be overtaken by the reaction of a Ni-Ln complex, soluble in a non-protic solvent, with a LM complex (M = Cu, Zn). By doing so, a heterotrinuclear complex made of three different metal ions, two distinct 3d ions and a 4f one, has been isolated and structurally characterized. Note that the Ni coordination number decreases from 6 to 5 on going from the dinuclear complex to the trinuclear one. Also, the replacement of water molecules by chloride ligands in the hexacoordinate Ni complexes induces a net increase of the positive zero-field splitting parameter D to 20 cm-1, which is supported by ab initio calculations. Although the Ni-Ln (Ln = Gd, Tb, Dy) magnetic interactions are ferromagnetic, the corresponding trinuclear complexes are devoid of SMM properties in the absence of an applied magnetic field.
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Barakat F, Vansteelandt M, Triastuti A, Jargeat P, Jacquemin D, Graton J, Mejia K, Cabanillas B, Vendier L, Stigliani JL, Haddad M, Fabre N. Thiodiketopiperazines with two spirocyclic centers extracted from Botryosphaeria mamane, an endophytic fungus isolated from Bixa orellana L. PHYTOCHEMISTRY 2019; 158:142-148. [PMID: 30576967 DOI: 10.1016/j.phytochem.2018.11.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 11/08/2018] [Accepted: 11/09/2018] [Indexed: 06/09/2023]
Abstract
Three thiodiketopiperazines, botryosulfuranols A-C (1-3) were isolated from the endophytic fungus Botryosphaeria mamane. The three compounds present sulfur atoms on α- and β-positions of phenylalanine derived residues and unprecedented two spirocyclic centers at C-4 and C-2'. Their planar structures were determined by spectroscopic analysis and absolute configurations were achieved by X-ray diffraction analysis and ECD and NMR chemical shifts calculations. Botryosulfuranol A (1) was the most cytotoxic compound against four cancer cell lines (HT-29, HepG2, Caco-2, HeLa) and two healthy cell lines (IEC6, Vero) highlighting the importance of an electrophilic center for cell growth inhibition.
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Cuevas-Chávez CA, Vendier L, Sabo-Etienne S, Montiel-Palma V. Iridium complexes featuring a tridentate SiPSi ligand: from dimeric to monomeric 14, 16 or 18-electron species. Dalton Trans 2019; 48:14010-14018. [DOI: 10.1039/c9dt03136g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Dimer [Ir{P(o-C6H4CH2SiMe2)2Ph}(μ-Cl)]2 featuring tricoordinate phosphinodisilyl ligands dissociates in solution to the reactive 14 electron monomer [Ir(SiPSi)Cl].
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