1
|
Le Roy MM, Claes S, Saffon-Merceron N, Schols D, Troadec T, Tripier R. Selective synthesis of an elusive C-functional bis-cyclam and study of its inhibition of the CXCR4 chemokine receptor. Org Biomol Chem 2024; 22:3059-3067. [PMID: 38545887 DOI: 10.1039/d3ob02050a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/18/2024]
Abstract
This article presents the controlled synthesis of a rare example of C,C'-linked bis-cyclam architecture in mild conditions through the "bis-aminal" route previously used for the advantageous synthesis of cyclam, N- and C-functional cyclams and N,N'-bis-cyclams. Two synthetic pathways were explored with the smart design of α,β-unsaturated ketones or alkyl halides bis-cyclizing agents. The first led to the isolation of a key intermediate for the future design of N-functionalized bis-cyclams, whereas the second allowed the preparation of the targeted C,C'-xylylene-bis-cyclam under mild conditions with decent yield. This compound was then studied as a CXCR4 receptor inhibitor, one of the main applications known for bis-macrocyclic compounds, in particular in the context of HIV (human immunodeficiency virus) infection. Although results demonstrated that its potency is lower (i.e. 137-fold higher IC50) than the gold standard AMD3100 against HIV infection, clear evidence of CXCR4 inhibition is presented, confirming the potential of this novel architecture and related compounds in this research field.
Collapse
Affiliation(s)
- Marie M Le Roy
- Univ Brest, UMR CNRS 6521 CEMCA, 6 Avenue Victor le Gorgeu, 29200 Brest, France.
| | - Sandra Claes
- Rega Institute for Medical Research, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | | | - Dominique Schols
- Rega Institute for Medical Research, KU Leuven, Herestraat 49, 3000 Leuven, Belgium
| | - Thibault Troadec
- Univ Brest, UMR CNRS 6521 CEMCA, 6 Avenue Victor le Gorgeu, 29200 Brest, France.
| | - Raphaël Tripier
- Univ Brest, UMR CNRS 6521 CEMCA, 6 Avenue Victor le Gorgeu, 29200 Brest, France.
| |
Collapse
|
2
|
Le Roy MM, Héry S, Saffon-Merceron N, Platas-Iglesias C, Troadec T, Tripier R. A Phosphine Oxide-Functionalized Cyclam as a Specific Copper(II) Chelator. Inorg Chem 2023; 62:8112-8122. [PMID: 37191969 DOI: 10.1021/acs.inorgchem.3c00329] [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: 05/17/2023]
Abstract
Although cyclam-based ligands are among the strongest copper(II) chelators available, they also usually present good affinity for other divalent cations [Zn(II), Ni(II), and Co(II)], with no copper(II)-specific cyclam ligands having been described so far. As such a property is highly desirable in a wide range of applications, we present herein two novel phosphine oxide-appended cyclam ligands that could be efficiently synthesized through Kabachnik-Fields type reactions on protected cyclam precursors. Their copper(II) coordination properties were closely studied by different physicochemical techniques [electron paramagnetic resonance (EPR) and ultraviolet-visible (UV-vis) spectroscopies, X-ray diffraction, and potentiometry]. The mono(diphenylphosphine oxide)-functionalized ligand demonstrated a copper(II)-specific behavior, unprecedented within the cyclam family of ligands. This was evidenced by UV-vis complexation and competition studies with the parent divalent cations. Density functional theory calculations also confirmed that the particular ligand geometry in the complexes strongly favors copper(II) coordination over that of competing divalent cations, rationalizing the specificity observed experimentally.
Collapse
Affiliation(s)
- Marie M Le Roy
- Univ Brest, UMR CNRS 6521 CEMCA, 6 Avenue Victor Le Gorgeu, 29200 Brest, France
| | - Simon Héry
- Univ Brest, UMR CNRS 6521 CEMCA, 6 Avenue Victor Le Gorgeu, 29200 Brest, France
| | - Nathalie Saffon-Merceron
- Institut de Chimie de Toulouse (UAR 2599), 118 route de Narbonne, 31062 Toulouse Cedex 9, France
| | - Carlos Platas-Iglesias
- Universidade da Coruña, Centro de Investigacións Científicas Avanzadas (CICA) and Departamento de Química, Facultade de Ciencias, 15071 A Coruña, Galicia, Spain
| | - Thibault Troadec
- Univ Brest, UMR CNRS 6521 CEMCA, 6 Avenue Victor Le Gorgeu, 29200 Brest, France
| | - Raphaël Tripier
- Univ Brest, UMR CNRS 6521 CEMCA, 6 Avenue Victor Le Gorgeu, 29200 Brest, France
| |
Collapse
|
3
|
Takahashi S, Nougué R, Troadec T, Baceiredo A, Saffon-Merceron N, Branchadell V, Kato T. Base-Stabilized Cationic Silyne with a π-Accepting Phosphonio Substituent. Inorg Chem 2023; 62:6488-6498. [PMID: 37043365 DOI: 10.1021/acs.inorgchem.3c00513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/13/2023]
Abstract
A base-stabilized C-phosphonio-Si-amino-silyne 3 was synthesized, using an original method, through a coupling reaction between two Lewis-base-stabilized low-valent species: a silyliumylidene ion 1 and a P,S-bis-ylide 2 [C(0)-complex]. This new isolable cationic silyne 3 displays remarkably high stability at room temperature [t1/2 = 7 days in tetrahydrofuran (THF)] and a unique silyne reactivity thanks to the effect of phosphonio substituent.
Collapse
Affiliation(s)
- Shintaro Takahashi
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse, CNRS, 118 route de Narbonne, F-31062 Toulouse, France
| | - Raphaël Nougué
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse, CNRS, 118 route de Narbonne, F-31062 Toulouse, France
| | - Thibault Troadec
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse, CNRS, 118 route de Narbonne, F-31062 Toulouse, France
| | - Antoine Baceiredo
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse, CNRS, 118 route de Narbonne, F-31062 Toulouse, France
| | - Nathalie Saffon-Merceron
- Institut de Chimie de Toulouse (UAR 2599), Université de Toulouse, CNRS, 118 route de Narbonne, F-31062 Toulouse, France
| | - Vicenç Branchadell
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Tsuyoshi Kato
- Laboratoire Hétérochimie Fondamentale et Appliquée (UMR 5069), Université de Toulouse, CNRS, 118 route de Narbonne, F-31062 Toulouse, France
| |
Collapse
|
4
|
Marlin A, Le Pape F, Le Goff J, Hamon N, Troadec T, Tripier R, Berthou C, Patinec V. New Triazacycloalkane Derivatives as Cytotoxic Agents for CLL Treatment: From Proof of Concept to the Targeting Biomolecule. Bioconjug Chem 2022; 33:1377-1392. [PMID: 35709513 DOI: 10.1021/acs.bioconjchem.2c00227] [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: 11/28/2022]
Abstract
The 1,4,7-tris-(2-pyridinylmethyl)-1,4,7-triazacyclononane ligand (no3py) and its bifunctional analogue no3pyCOOK were synthesized to investigate their action toward zinc(II) depletion related to the apoptosis phenomenon in chronic lymphocytic leukemia (CLL) cells. no3py was used as the "free" ligand, while its "graftable" derivative was conjugated on a newly synthesized bifunctional sialoglycan, 6'-SL-NH2, selected to specifically bind CD22 biomarker expressed on the B-CLL cell surface. Both compounds were produced with good yields thanks to a Sonogashira coupling reaction and an orthoester function, respectively, for the chelator and the targeting moiety. The newly reported bioconjugate 6'-SL-no3py was then obtained through a peptidic coupling reaction. Biological in vitro studies of no3py and 6'-SL-no3py consisting of real-time detection of cell health (cytotoxicity and proliferation) and caspases 3/7 activation (crucial enzymes whose activation triggers cell death signaling pathways) have been investigated. First, Ramos, Daudi, and Raji B-cell lines, which present different sensitivity to zinc(II) content variation, were incubated with no3py and 6'-SL-no3py. Then, a videomicroscope allowed the real-time monitoring of the morphological changes leading to cell death from the detection of the cytotoxicity, the antiproliferative effect, and the caspasic activity. In terms of mechanism, the Zn2+ chelator cytotoxic effect of no3py has been evidenced by a culture medium ion supplementation study and by the decrease of intracellular fluorescence of Zn-specific fluorophore zinquin in the presence of no3py and 6'-SL-no3py chelators. Finally, flow cytometry analysis with classical Annexin V staining was conducted to detect no3py- and 6'-SL-no3py-induced apoptotic cell death in B-CLL cells. Time-course analysis, using the Incucyte Live-Cell Analysis System, demonstrated that no3py induced cell death in a time- and dose-dependent manner with variability across cell lines. 6'-SL-no3py exhibited the same dose-dependent trend as no3py, showing the efficiency of the targeting moiety. In both cases, the chelators depicted proliferation curves that were inversely correlated with kinetic death. Morphological changes specific to apoptosis and caspase 3/7 activation were observed for the three cell lines treated with no3py and 6'-SL-no3py, highlighting their role as apoptotic agents. A higher concentration of 6'-SL-no3py is needed to reach 50% of the B-CLL mortality, confirming a targeting of the chelator to the cell membrane. Overall, our results proved that the biological properties of the triazamacrocyclic chelator still remain even after addition of the targeting moiety. The free chelator as well as the bioconjugate constitute promising cytotoxic agents for CLL therapy through apoptosis induction.
Collapse
Affiliation(s)
- Axia Marlin
- Univ. Brest, UMR-CNRS 6521 CEMCA, 6 Avenue Victor le Gorgeu, 29238 Brest, France
| | - Fiona Le Pape
- Univ. Brest, UMR-INSERM 1227 LBAI, 5 Avenue Foch, CHU Morvan, BP 824, 29609 Brest, France
| | - Jocelyn Le Goff
- Univ. Brest, UMR-INSERM 1227 LBAI, 5 Avenue Foch, CHU Morvan, BP 824, 29609 Brest, France
| | - Nadège Hamon
- Univ. Brest, UMR-CNRS 6521 CEMCA, 6 Avenue Victor le Gorgeu, 29238 Brest, France
| | - Thibault Troadec
- Univ. Brest, UMR-CNRS 6521 CEMCA, 6 Avenue Victor le Gorgeu, 29238 Brest, France
| | - Raphaël Tripier
- Univ. Brest, UMR-CNRS 6521 CEMCA, 6 Avenue Victor le Gorgeu, 29238 Brest, France
| | - Christian Berthou
- Univ. Brest, UMR-INSERM 1227 LBAI, 5 Avenue Foch, CHU Morvan, BP 824, 29609 Brest, France
| | - Véronique Patinec
- Univ. Brest, UMR-CNRS 6521 CEMCA, 6 Avenue Victor le Gorgeu, 29238 Brest, France
| |
Collapse
|
5
|
Knighton RC, Troadec T, Mazan V, Le Saëc P, Marionneau-Lambot S, Le Bihan T, Saffon-Merceron N, Le Bris N, Chérel M, Faivre-Chauvet A, Elhabiri M, Charbonnière LJ, Tripier R. Cyclam-Based Chelators Bearing Phosphonated Pyridine Pendants for 64Cu-PET Imaging: Synthesis, Physicochemical Studies, Radiolabeling, and Bioimaging. Inorg Chem 2021; 60:2634-2648. [PMID: 33496592 DOI: 10.1021/acs.inorgchem.0c03492] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein we present the preparation of two novel cyclam-based macrocycles (te1pyp and cb-te1pyp), bearing phosphonate-appended pyridine side arms for the coordination of copper(II) ions in the context of 64Cu PET imaging. The two ligands have been prepared through conventional protection-alkylation sequences on cyclam, and their coordination properties have been thoroughly investigated. The corresponding copper complexes have been fully characterized in the solid state (X-ray diffraction analysis) and in solution (EPR and UV-vis spectroscopies). Potentiometric studies combined with spectrometry have also allowed us to determine their thermodynamic stability constants, confirming their high affinity for copper(II) cations. The kinetic inertness of the complexes has been verified by acid-assisted dissociation experiments, enabling their use in 64Cu-PET imaging in mice for the first time. Indeed, the two ligands could be quantitatively radiolabeled under mild conditions, and the resulting 64Cu complexes have demonstrated excellent stability in serum. PET imaging demonstrated a set of features emerging from the combination of picolinates and phosphonate units: high stability in vivo, fast clearance from the body via renal elimination, and most interestingly, very low fixation in the liver. This is in contrast with what was observed for monopicolinate cyclam (te1pa), which had a non-negligible accumulation in the liver, owing probably to its different charge and lipophilicity. These results thus pave the way for the use of such phosphonated pyridine chelators for in vivo 64Cu-PET imaging.
Collapse
Affiliation(s)
- Richard C Knighton
- Univ. Brest, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, 29200 Brest, France
| | - Thibault Troadec
- Univ. Brest, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, 29200 Brest, France
| | - Valérie Mazan
- Université de Strasbourg, CNRS, UMR 7042-LIMA, Equipe de Chimie Bioorganique et Médicinale, ECPM, 25 rue Becquerel, Strasbourg 67087, France
| | - Patricia Le Saëc
- Université de Nantes, CHRU de Nantes, Centre de Recherche en Cancérologie et Immunologie Nantes Angers (CRCINA), Unité INSERM 1232-CNRS 6299, 8 quai Moncousu, BP 70721, 44007 Nantes Cedex, France
| | - Séverine Marionneau-Lambot
- Université de Nantes, CHRU de Nantes, Centre de Recherche en Cancérologie et Immunologie Nantes Angers (CRCINA), Unité INSERM 1232-CNRS 6299, 8 quai Moncousu, BP 70721, 44007 Nantes Cedex, France
| | - Thomas Le Bihan
- Univ. Brest, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, 29200 Brest, France
| | | | - Nathalie Le Bris
- Univ. Brest, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, 29200 Brest, France
| | - Michel Chérel
- Université de Nantes, CHRU de Nantes, Centre de Recherche en Cancérologie et Immunologie Nantes Angers (CRCINA), Unité INSERM 1232-CNRS 6299, 8 quai Moncousu, BP 70721, 44007 Nantes Cedex, France
| | - Alain Faivre-Chauvet
- Université de Nantes, CHRU de Nantes, Centre de Recherche en Cancérologie et Immunologie Nantes Angers (CRCINA), Unité INSERM 1232-CNRS 6299, 8 quai Moncousu, BP 70721, 44007 Nantes Cedex, France
| | - Mourad Elhabiri
- Université de Strasbourg, CNRS, UMR 7042-LIMA, Equipe de Chimie Bioorganique et Médicinale, ECPM, 25 rue Becquerel, Strasbourg 67087, France
| | - Loïc J Charbonnière
- UMR 7178, Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, ECPM, , 25 rue Becquerel, 67087 Strasbourg Cedex 2, France
| | - Raphaël Tripier
- Univ. Brest, UMR CNRS 6521, 6 Avenue Victor Le Gorgeu, 29200 Brest, France
| |
Collapse
|
6
|
Knighton RC, Soro LK, Troadec T, Mazan V, Nonat AM, Elhabiri M, Saffon-Merceron N, Djenad S, Tripier R, Charbonnière LJ. Formation of Heteropolynuclear Lanthanide Complexes Using Macrocyclic Phosphonated Cyclam-Based Ligands. Inorg Chem 2020; 59:10311-10327. [PMID: 32639724 DOI: 10.1021/acs.inorgchem.0c01456] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ligands L1 and L2, respectively based on a cyclam and a cross-bridged cyclam scaffold functionalized at N1 and N8 by 6-phosphonic-2-methylene pyridyl groups, are described. While complexation of lanthanide (Ln) cations with L2 was not possible, a family of complexes has been prepared with L1, of the general formulae [LnL1H2]Cl (Ln3+ = Lu, Tb, Yb) or [LnL1H] (Ln3+ = Eu). The solution, structural, potentiometric, and photophysical data for these novel ligands and their complexes have been investigated, including a solid-state study by X-ray diffraction (L1, L2, and [EuL1H]), 1H NMR complexation investigations (Lu3+), as well as UV-vis absorption and luminescence spectroscopy in water and D2O (pH ≈ 7). L1 forms 1:1 metal-ligand stoichiometric octadentate complexes in solution. Importantly, the pyridyl phosphonate functions are capable of simultaneous chelation to the metal center and of interaction with a second metal center. 1H NMR (Lu3+) and spectrophotometric titrations of the isolated [TbL1]- complex by EuCl3 salts demonstrated the formation of high-order (hetero)polymetallic species in aqueous solution (H2O, pH = 7). Global analysis of the luminescence titration experiment points to the formation of 4:1, 3:1, and 3:2 [TbL1]/Eu heteropolynuclear assemblies, exhibiting a strong preference to forming [TbL1]3Eu2 at increased europium concentrations, with energy transfer occurring between the kinetically inert terbium complex and added europium cations.
Collapse
Affiliation(s)
- Richard C Knighton
- Univ. Brest, UMR CNRS 6521 CEMCA, 6 Avenue Victor le Gorgeu, 29200 Brest, France.,Equipe de Synthèse Pour l'Analyse (SynPA), Institut Pluridisciplinaire Hubert Curien (IPHC), UMR 7178 CNRS/Université de Strasbourg, ECPM, Bâtiment R1N0, 25, rue Becquerel, 67087 Strasbourg, Cedex 2, France
| | - Lohona K Soro
- Equipe de Synthèse Pour l'Analyse (SynPA), Institut Pluridisciplinaire Hubert Curien (IPHC), UMR 7178 CNRS/Université de Strasbourg, ECPM, Bâtiment R1N0, 25, rue Becquerel, 67087 Strasbourg, Cedex 2, France
| | - Thibault Troadec
- Univ. Brest, UMR CNRS 6521 CEMCA, 6 Avenue Victor le Gorgeu, 29200 Brest, France
| | - Valerie Mazan
- Equipe Chimie Bioorganique et Médicinale, Laboratoire d'Innovation Moléculaire et Applications (LIMA), UMR7042 CNRS-Unistra-UHA, ECPM, 25, rue Becquerel, 67087 Strasbourg, Cedex 2, France
| | - Aline M Nonat
- Equipe de Synthèse Pour l'Analyse (SynPA), Institut Pluridisciplinaire Hubert Curien (IPHC), UMR 7178 CNRS/Université de Strasbourg, ECPM, Bâtiment R1N0, 25, rue Becquerel, 67087 Strasbourg, Cedex 2, France
| | - Mourad Elhabiri
- Equipe Chimie Bioorganique et Médicinale, Laboratoire d'Innovation Moléculaire et Applications (LIMA), UMR7042 CNRS-Unistra-UHA, ECPM, 25, rue Becquerel, 67087 Strasbourg, Cedex 2, France
| | - Nathalie Saffon-Merceron
- Institut de Chimie de Toulouse (FR 2599), 118 route de Narbonne, 31062 Toulouse, Cedex 9, France
| | - Saifou Djenad
- Equipe de Synthèse Pour l'Analyse (SynPA), Institut Pluridisciplinaire Hubert Curien (IPHC), UMR 7178 CNRS/Université de Strasbourg, ECPM, Bâtiment R1N0, 25, rue Becquerel, 67087 Strasbourg, Cedex 2, France
| | - Raphaël Tripier
- Univ. Brest, UMR CNRS 6521 CEMCA, 6 Avenue Victor le Gorgeu, 29200 Brest, France
| | - Loïc J Charbonnière
- Equipe de Synthèse Pour l'Analyse (SynPA), Institut Pluridisciplinaire Hubert Curien (IPHC), UMR 7178 CNRS/Université de Strasbourg, ECPM, Bâtiment R1N0, 25, rue Becquerel, 67087 Strasbourg, Cedex 2, France
| |
Collapse
|
7
|
Bordes A, Poveda A, Troadec T, Franconetti A, Ardá A, Perrin F, Ménand M, Sollogoub M, Guillard J, Désiré J, Tripier R, Jiménez-Barbero J, Blériot Y. Synthesis, Conformational Analysis, and Complexation Study of an Iminosugar-Aza-Crown, a Sweet Chiral Cyclam Analog. Org Lett 2020; 22:2344-2349. [PMID: 32153195 PMCID: PMC7114874 DOI: 10.1021/acs.orglett.0c00503] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
A new family of chiral C2 symmetric
tetraazamacrocycles, coined ISAC for IminoSugar Aza-Crown, incorporating
two iminosugars adopting a 4C1 conformation
is disclosed. Multinuclear NMR experiments on the corresponding Cd2+ complex show that the ISAC is a strong chelator in water
and its tetramine cavity adopts a conformation similar to that of
the parent Cd–cyclam complex. Similar behavior is observed
with Cu2+ in solution, with enhanced stability compared
to the Cu–cyclam complex.
Collapse
Affiliation(s)
- Alexandra Bordes
- Université de Poitiers, IC2MP, UMR CNRS 7285, Equipe "Synthèse Organique", Groupe Glycochimie 4 rue Michel Brunet, 86073 Poitiers cedex 9, France
| | - Ana Poveda
- CIC bioGUNE, Parque Tecnológico de Bizkaia, Edif. 801A-1°, Derio-Bizkaia 48160, Spain
| | - Thibault Troadec
- Universite de Brest, UMR-CNRS 6521 CEMCA, 6 Avenue Victor le Gorgeu, 29200 Brest, France
| | - Antonio Franconetti
- CIC bioGUNE, Parque Tecnológico de Bizkaia, Edif. 801A-1°, Derio-Bizkaia 48160, Spain
| | - Ana Ardá
- CIC bioGUNE, Parque Tecnológico de Bizkaia, Edif. 801A-1°, Derio-Bizkaia 48160, Spain
| | - Flavie Perrin
- Université de Poitiers, IC2MP, UMR CNRS 7285, Equipe "Synthèse Organique", Groupe Glycochimie 4 rue Michel Brunet, 86073 Poitiers cedex 9, France
| | - Mickaël Ménand
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, UMR 8232, 4 place Jussieu, 75005 Paris, France
| | - Matthieu Sollogoub
- Sorbonne Université, CNRS, Institut Parisien de Chimie Moléculaire, UMR 8232, 4 place Jussieu, 75005 Paris, France
| | - Jerôme Guillard
- Université de Poitiers, IC2MP, UMR CNRS 7285, Equipe "Synthèse Organique", Groupe Glycochimie 4 rue Michel Brunet, 86073 Poitiers cedex 9, France
| | - Jérôme Désiré
- Université de Poitiers, IC2MP, UMR CNRS 7285, Equipe "Synthèse Organique", Groupe Glycochimie 4 rue Michel Brunet, 86073 Poitiers cedex 9, France
| | - Raphaël Tripier
- Universite de Brest, UMR-CNRS 6521 CEMCA, 6 Avenue Victor le Gorgeu, 29200 Brest, France
| | - Jesús Jiménez-Barbero
- CIC bioGUNE, Parque Tecnológico de Bizkaia, Edif. 801A-1°, Derio-Bizkaia 48160, Spain.,IKERBASQUE, Basque Foundation for Science, 48009 Bilbao, Spain.,Dept. Organic Chemistry II, Faculty of Science and Technology, University of the Basque Country, 48940 Leioa, Spain
| | - Yves Blériot
- Université de Poitiers, IC2MP, UMR CNRS 7285, Equipe "Synthèse Organique", Groupe Glycochimie 4 rue Michel Brunet, 86073 Poitiers cedex 9, France
| |
Collapse
|
8
|
Troadec T, Wasano T, Lenk R, Baceiredo A, Saffon-Merceron N, Hashizume D, Saito Y, Nakata N, Branchadell V, Kato T. Donor-Stabilized Silylene/Phosphine-Supported Carbon(0) Center with High Electron Density. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702858] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Thibault Troadec
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069; 31062 Toulouse France
| | - Tatsuya Wasano
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069; 31062 Toulouse France
| | - Romaric Lenk
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069; 31062 Toulouse France
| | - Antoine Baceiredo
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069; 31062 Toulouse France
| | | | - Daisuke Hashizume
- Materials Characterization Support Unit; RIKEN Center for Emergent Matter Science (CEMS); Wako Saitama 351-0198 Japan
| | - Yosuke Saito
- Department of Chemistry, Graduate School of Science and Engineering Departament; Saitama University; Shimo-okubo, Sakura-ku Saitama 338-8570 Japan
| | - Norio Nakata
- Department of Chemistry, Graduate School of Science and Engineering Departament; Saitama University; Shimo-okubo, Sakura-ku Saitama 338-8570 Japan
| | - Vicenç Branchadell
- Departament de Química; Universitat Autònoma de Barcelona; 08193 Bellaterra Spain
| | - Tsuyoshi Kato
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069; 31062 Toulouse France
| |
Collapse
|
9
|
Troadec T, Wasano T, Lenk R, Baceiredo A, Saffon-Merceron N, Hashizume D, Saito Y, Nakata N, Branchadell V, Kato T. Donor-Stabilized Silylene/Phosphine-Supported Carbon(0) Center with High Electron Density. Angew Chem Int Ed Engl 2017; 56:6891-6895. [PMID: 28474846 DOI: 10.1002/anie.201702858] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [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: 03/20/2017] [Indexed: 11/08/2022]
Abstract
An isolable donor-stabilized silavinylidene phosphorane was synthesized. This molecule, which can also be regarded as a new carbon(0) complex featuring a phosphine and a donor-stabilized silylene ligand, presents a central carbon atom with a remarkably high electron density (-1.82). Furthermore, the experimental electron-density study of this compound demonstrates the delocalization of the σ-lone pair at the central carbon atom toward the silicon center, a feature which is remarkably different from electronic situation of other bent-allene-type molecules. This result clearly demonstrates the powerful electron-donating ability of donor-stabilized silylene ligands, as well as their excellent electron-acceptor properties.
Collapse
Affiliation(s)
- Thibault Troadec
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, 31062, Toulouse, France
| | - Tatsuya Wasano
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, 31062, Toulouse, France
| | - Romaric Lenk
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, 31062, Toulouse, France
| | - Antoine Baceiredo
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, 31062, Toulouse, France
| | - Nathalie Saffon-Merceron
- Université de Toulouse, UPS, and CNRS, ICT FR2599, 118 route de Narbonne, 31062, Toulouse, France
| | - Daisuke Hashizume
- Materials Characterization Support Unit, RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama, 351-0198, Japan
| | - Yosuke Saito
- Department of Chemistry, Graduate School of Science and Engineering Departament, Saitama University, Shimo-okubo, Sakura-ku, Saitama, 338-8570, Japan
| | - Norio Nakata
- Department of Chemistry, Graduate School of Science and Engineering Departament, Saitama University, Shimo-okubo, Sakura-ku, Saitama, 338-8570, Japan
| | - Vicenç Branchadell
- Departament de Química, Universitat Autònoma de Barcelona, 08193, Bellaterra, Spain
| | - Tsuyoshi Kato
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, 31062, Toulouse, France
| |
Collapse
|
10
|
Troadec T, Prades A, Rodriguez R, Mirgalet R, Baceiredo A, Saffon-Merceron N, Branchadell V, Kato T. Silacyclopropylideneplatinum(0) Complex as a Robust and Efficient Hydrosilylation Catalyst. Inorg Chem 2016; 55:8234-40. [DOI: 10.1021/acs.inorgchem.6b01505] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Thibault Troadec
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, F-31062 Toulouse, France
| | - Amparo Prades
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, F-31062 Toulouse, France
| | - Ricardo Rodriguez
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, F-31062 Toulouse, France
| | - Raphael Mirgalet
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, F-31062 Toulouse, France
| | - Antoine Baceiredo
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, F-31062 Toulouse, France
| | - Nathalie Saffon-Merceron
- Université de Toulouse, UPS, and CNRS, ICT FR2599, 118 route de Narbonne, F-31062 Toulouse, France
| | - Vicenç Branchadell
- Departament
de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Tsuyoshi Kato
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, F-31062 Toulouse, France
| |
Collapse
|
11
|
Reyes ML, Troadec T, Rodriguez R, Baceiredo A, Saffon-Merceron N, Branchadell V, Kato T. Donor/Acceptor-Stabilized 1-Silaketene: Reversible [2+2] Cycloaddition with Pyridine and Evolution by an Olefin Metathesis Reaction. Chemistry 2016; 22:10247-53. [DOI: 10.1002/chem.201601753] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Indexed: 01/07/2023]
Affiliation(s)
| | - Thibault Troadec
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069; 31062 Toulouse France
| | - Ricardo Rodriguez
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069; 31062 Toulouse France
| | - Antoine Baceiredo
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069; 31062 Toulouse France
| | | | - Vicenç Branchadell
- Université de Toulouse, UPS, and CNRS, ICT FR2599; 118 route de Narbonne 31062 Toulouse France
| | - Tsuyoshi Kato
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069; 31062 Toulouse France
| |
Collapse
|
12
|
Troadec T, Tan SY, Wedge CJ, Rourke JP, Unwin PR, Chaplin AB. One-Electron Oxidation of [M(P(t) Bu3 )2 ] (M=Pd, Pt): Isolation of Monomeric [Pd(P(t) Bu3 )2 ](+) and Redox-Promoted C-H Bond Cyclometalation. Angew Chem Int Ed Engl 2016; 55:3754-7. [PMID: 26879233 PMCID: PMC4797707 DOI: 10.1002/anie.201511467] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Indexed: 11/25/2022]
Abstract
Oxidation of zero-valent phosphine complexes [M(P(t) Bu3 )2 ] (M=Pd, Pt) has been investigated in 1,2-difluorobenzene solution using cyclic voltammetry and subsequently using the ferrocenium cation as a chemical redox agent. In the case of palladium, a mononuclear paramagnetic Pd(I) derivative was readily isolated from solution and fully characterized (EPR, X-ray crystallography). While in situ electrochemical measurements are consistent with initial one-electron oxidation, the heavier congener undergoes C-H bond cyclometalation and ultimately affords the 14 valence-electron Pt(II) complex [Pt(κ(2) PC -P(t) Bu2 CMe2 CH2 )(P(t) Bu3 )](+) with concomitant formation of [Pt(P(t) Bu3 )2 H](+) .
Collapse
Affiliation(s)
- Thibault Troadec
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK
| | - Sze-Yin Tan
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK
| | - Christopher J Wedge
- Department of Physics, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK
| | - Jonathan P Rourke
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK
| | - Patrick R Unwin
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK
| | - Adrian B Chaplin
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK.
| |
Collapse
|
13
|
Troadec T, Lopez Reyes M, Rodriguez R, Baceiredo A, Saffon-Merceron N, Branchadell V, Kato T. Donor-Stabilized Silacyclobutanone: A Precursor of 1-Silaketene via Retro-[2 + 2]-Cycloaddition Reaction at Room Temperature. J Am Chem Soc 2016; 138:2965-8. [DOI: 10.1021/jacs.6b00631] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Thibault Troadec
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, F-31062 Toulouse, France
| | - Morelia Lopez Reyes
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, F-31062 Toulouse, France
| | - Ricardo Rodriguez
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, F-31062 Toulouse, France
| | - Antoine Baceiredo
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, F-31062 Toulouse, France
| | - Nathalie Saffon-Merceron
- Université de Toulouse, UPS, and CNRS, ICT FR2599, 118 route de Narbonne, F-31062 Toulouse, France
| | - Vicenç Branchadell
- Departament
de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Tsuyoshi Kato
- Université de Toulouse, UPS, and CNRS, LHFA UMR 5069, F-31062 Toulouse, France
| |
Collapse
|
14
|
Troadec T, Tan SY, Wedge CJ, Rourke JP, Unwin PR, Chaplin AB. One-Electron Oxidation of [M(Pt
Bu3
)2
] (M=Pd, Pt): Isolation of Monomeric [Pd(Pt
Bu3
)2
]+
and Redox-Promoted C−H Bond Cyclometalation. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511467] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Thibault Troadec
- Department of Chemistry; University of Warwick; Gibbet Hill Road Coventry CV4 7AL UK
| | - Sze-yin Tan
- Department of Chemistry; University of Warwick; Gibbet Hill Road Coventry CV4 7AL UK
| | - Christopher J. Wedge
- Department of Physics; University of Warwick; Gibbet Hill Road Coventry CV4 7AL UK
| | - Jonathan P. Rourke
- Department of Chemistry; University of Warwick; Gibbet Hill Road Coventry CV4 7AL UK
| | - Patrick R. Unwin
- Department of Chemistry; University of Warwick; Gibbet Hill Road Coventry CV4 7AL UK
| | - Adrian B. Chaplin
- Department of Chemistry; University of Warwick; Gibbet Hill Road Coventry CV4 7AL UK
| |
Collapse
|
15
|
Nakata N, Rodriguez R, Troadec T, Saffon-Merceron N, Sotiropoulos JM, Baceiredo A, Kato T. A Stable Silene Substituted by Strong π-Donors at the Silicon Center. Angew Chem Int Ed Engl 2013; 52:10840-4. [DOI: 10.1002/anie.201304594] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2013] [Revised: 07/15/2013] [Indexed: 11/10/2022]
|
16
|
Nakata N, Rodriguez R, Troadec T, Saffon-Merceron N, Sotiropoulos JM, Baceiredo A, Kato T. A Stable Silene Substituted by Strong π-Donors at the Silicon Center. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201304594] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
17
|
Rodriguez R, Gau D, Troadec T, Saffon-Merceron N, Branchadell V, Baceiredo A, Kato T. A Base-Stabilized Sila-β-Lactone and a Donor/Acceptor-Stabilized Silanoic Acid. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201304482] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
18
|
Rodriguez R, Gau D, Troadec T, Saffon-Merceron N, Branchadell V, Baceiredo A, Kato T. A Base-Stabilized Sila-β-Lactone and a Donor/Acceptor-Stabilized Silanoic Acid. Angew Chem Int Ed Engl 2013; 52:8980-3. [DOI: 10.1002/anie.201304482] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2013] [Indexed: 11/09/2022]
|
19
|
Rodriguez R, Troadec T, Gau D, Saffon-Merceron N, Hashizume D, Miqueu K, Sotiropoulos JM, Baceiredo A, Kato T. Synthesis of a Donor-Stabilized Silacyclopropan-1-one. Angew Chem Int Ed Engl 2013; 52:4426-30. [DOI: 10.1002/anie.201210010] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Indexed: 11/09/2022]
|
20
|
Rodriguez R, Troadec T, Kato T, Saffon-Merceron N, Sotiropoulos JM, Baceiredo A. Synthesis and Characterization of an Isolable Base-Stabilized Silacycloprop-1-ylidene. Angew Chem Int Ed Engl 2012; 51:7158-61. [DOI: 10.1002/anie.201201581] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Indexed: 11/08/2022]
|
21
|
Rodriguez R, Troadec T, Kato T, Saffon-Merceron N, Sotiropoulos JM, Baceiredo A. Synthesis and Characterization of an Isolable Base-Stabilized Silacycloprop-1-ylidene. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201201581] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|