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Chen J, Lin Y, Wu WQ, Hu WQ, Xu J, Shi H. Amination of Aminopyridines via η 6-Coordination Catalysis. J Am Chem Soc 2024. [PMID: 39120946 DOI: 10.1021/jacs.4c07306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/11/2024]
Abstract
Pyridine, a widespread aromatic heterocycle, features a sp2-hybridized nitrogen atom that can readily coordinate to metals, leading to distinctive achievements in catalysis. In stark contrast, π-coordination of pyridine and derivatives with transition metals is notably scarce, and the involvement of such activation mode in catalysis remains to be developed. Herein, we present amination reactions of aminopyridines that leverages the reversible π coordination with a ruthenium catalyst as the arenophilic π acid, rather than relying on the conventional κ-N coordination. Specifically, a transient η6-pyridine complex functions as the electrophile in the nucleophilic aromatic substitution with amines, providing a diverse array of products via the cleavage of the pyridyl C-N bond. In addition, this method can be employed to incorporate chiral amines and 15N-labeled amines.
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Affiliation(s)
- Jiajia Chen
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310030, Zhejiang Province, China
| | - Yunzhi Lin
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310030, Zhejiang Province, China
| | - Wen-Qiang Wu
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310030, Zhejiang Province, China
| | - Wei-Qiang Hu
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310030, Zhejiang Province, China
| | - Jingkai Xu
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310030, Zhejiang Province, China
| | - Hang Shi
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310030, Zhejiang Province, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province, China
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2
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Chen K, Shi H. Nucleophilic Aromatic Substitution of Halobenzenes and Phenols with Catalysis by Arenophilic π Acids. Acc Chem Res 2024; 57:2194-2206. [PMID: 39042917 DOI: 10.1021/acs.accounts.4c00327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2024]
Abstract
ConspectusLewis π acids, particularly high-valent transition metals with vacant orbitals, can coordinate with unsaturated compounds such as alkynes and alkenes by means of π-bonding. The coordination enhances the electrophilicity of the bound compounds, thereby facilitating reactions─such as nucleophilic addition─that take place at the ligated carbon-carbon multiple bonds. This activation phenomenon occurs at the ligand rather than at the metal atom, and it has been extensively utilized in the development of catalytic methods. In addition to alkynes and alkenes, aromatic compounds featuring a phenyl ring can be activated by an electrophilic transition-metal unit (e.g., Cr(CO)3, [Mn(CO)3]+, [CpFe]+, or [CpRu]+, where Cp = cyclopentadienyl) through π coordination. Over the past several decades, remarkable advances have been achieved in the development of reactions occurring on bound arenes, capitalizing on the highly electron-withdrawing nature of these transition-metal units and on the thermodynamic stability of η6-arene complexes. A prime example is the extension of nucleophilic aromatic substitution (SNAr) reactions to electron-neutral and -rich halobenzenes. Such arenes, which are normally inert to classical SNAr, can undergo sequences involving complex formation, substitution, and complex decomposition. Despite the successes achieved through the utilization of preformed complexes, the application of reversible arene coordination to catalytic systems has seen only limited progress. Consequently, in π-coordination activation, transition-metal units are commonly considered to be components of bound arene complexes rather than π-acid catalysts.In this Account, we summarize our recent research on catalytic SNAr reactions of halobenzenes and phenols enabled by reversible π-coordination of the arenes with electrophilic Ru or Rh catalysts, which we refer to as arenophilic π-acids. First, we developed a method for SNAr amination of fluorobenzenes with catalysis by a Ru(II) complex with a hemilabile P,O-bidentate ligand. The use of the hemilabile ligand significantly enhanced catalytic efficiency, allowing electron-rich and -neutral arenes to undergo amination without the need of excess fluorobenzenes. In a subsequent study of hydroxylation and alkoxylation reactions, we found that Rh(III) catalysts bearing a Cp-type ligand had a substantial activating effect. In addition, by isolating an η5 complex as the reaction intermediate, we obtained evidence in support of the long-standing hypothesis that SNAr of η6-arene complexes proceeds via a stepwise mechanism. Next, we extended the Rh-catalyzed SNAr to chloro- and bromobenzenes, which are abundant and readily available but are less reactive than corresponding fluorides toward SNAr. When the weakly nucleophilic alcohol hexafluoroisopropanol was used as a reaction partner, we were able to synthesize hexafluoroisopropyl aryl ethers, which are challenging to obtain by means of conventional approaches. Beyond halobenzenes, we successfully applied π-coordination strategy to achieve umpolung substitution reactions of phenols, which are typically nucleophilic. We found that an arenophilic Rh or Ru catalyst activated the phenol ring by π coordination instead of κ-O coordination, generating transient η5-phenoxo complexes that subsequently underwent carbonyl-amine condensation to produce anilines without the need for an exogenous oxidant or reductant. We anticipate that our research on catalyst development and reactions involving π-coordination activation will facilitate further advances in the application of arenophilic π acids.
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Affiliation(s)
- Kai Chen
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang 310030, China
| | - Hang Shi
- Key Laboratory of Precise Synthesis of Functional Molecules of Zhejiang Province, Department of Chemistry, School of Science and Research Center for Industries of the Future, Westlake University, Hangzhou, Zhejiang 310030, China
- Institute of Natural Sciences, Westlake Institute for Advanced Study, Hangzhou, Zhejiang 310024, China
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3
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Schulte T, Wang Z, Li CC, Hamad A, Waldbach F, Pampel J, Petzold R, Leutzsch M, Bahns F, Ritter T. Ruthenium Phenoxo Complexes: An Isolobal Ligand to Cp with Improved Properties. J Am Chem Soc 2024; 146:15825-15832. [PMID: 38819390 PMCID: PMC11177254 DOI: 10.1021/jacs.4c02088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 05/15/2024] [Accepted: 05/20/2024] [Indexed: 06/01/2024]
Abstract
Catalytic π-arene activation is based on catalysts that allow for arene exchange. To date, cyclopentadiene (Cp)-derived catalysts are the most commonly used in π-arene activation despite their low arene exchange rates. Herein, we report the synthesis, analysis, and catalytic application of Ru(II) complexes supported by phenoxo ligands, which are isolobal alternatives to Cp. The phenoxo complexes exhibit arene exchange rates significantly faster than those of the corresponding Cp complexes. The rate can be further increased through the choice of appropriate counterions. The mechanism of the arene exchange process is elucidated by kinetic and computational analyses. We demonstrate the utility of the new catalysts through an SNAr reaction between fluorobenzene and alcohols, including secondary alcohols that could not be used previously in related reactions. Moreover, the catalytic thermal decarboxylation of phenylacetic acids is presented.
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Affiliation(s)
- Tim Schulte
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
- Institute
of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Zikuan Wang
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
| | - Chen-Chen Li
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
| | - Aboubakr Hamad
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
- Institute
of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Felix Waldbach
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
| | - Julius Pampel
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
| | - Roland Petzold
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
| | - Markus Leutzsch
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
| | - Fritz Bahns
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
- Institute
of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Tobias Ritter
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
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4
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Wang Y, Zhang Y, Liang J, Tan B, Deng C, Huang W. Neutral inverse-sandwich rare-earth metal complexes of the benzene tetraanion. Chem Sci 2024; 15:8740-8749. [PMID: 38899277 PMCID: PMC11185217 DOI: 10.1039/d4sc02491e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Accepted: 05/11/2024] [Indexed: 06/21/2024] Open
Abstract
Rare-earth metal complexes of the parent benzene tetraanion and neutral inverse-sandwich rare-earth metal arene complexes have remained elusive. Here, we report the first neutral inverse-sandwich rare-earth metal complexes of the parent benzene tetraanion supported by a monoanionic β-diketiminate (BDI) ligand. Reduction of the trivalent rare-earth metal diiodide precursors (BDI)MI2(THF) (BDI = HC(C(Me)N[C6H3-(3-pentyl)2-2,6])2; M = Y, 1-Y; M = Sm, 1-Sm) in benzene or para-xylene by potassium graphite yielded the neutral inverse-sandwich rare-earth metal arene complexes [(BDI)M(THF) n ]2(μ-η6,η6-arene) (M = Y, Sm; arene = benzene, 2-M; arene = para-xylene, 3-M). Single crystal X-ray diffraction, spectroscopic and magnetic characterization studies, together with density functional theory (DFT) calculations confirm that these neutral rare-earth metal arene complexes possess an [M3+-(arene)4--M3+] electronic structure with strong metal-arene δ interactions. The arene exchange reactivity shows that 2-Sm has higher stability than 3-Sm. Furthermore, 2-Sm can behave as a four-electron reductant to reduce unsaturated organic substrates. Particularly, while the reaction of 2-Sm with 1,3,5,7-cyclooctatetraene (COT) yielded (BDI)Sm(η8-COT) (4-Sm), 2-Sm reacted with 1,4-diphenylbutadiyne to afford (BDI)Sm(η4-C4Ph2) (5-Sm), the first rare-earth metallacyclopentatriene complex.
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Affiliation(s)
- Yi Wang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University Beijing 100871 P. R. China
| | - Yurou Zhang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University Beijing 100871 P. R. China
| | - Jiefeng Liang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University Beijing 100871 P. R. China
| | - Bowen Tan
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University Beijing 100871 P. R. China
| | - Chong Deng
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University Beijing 100871 P. R. China
| | - Wenliang Huang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University Beijing 100871 P. R. China
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5
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Titova YY. Dynamic EPR Studies of the Formation of Catalytically Active Centres in Multicomponent Hydrogenation Systems. Catalysts 2023. [DOI: 10.3390/catal13040653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023] Open
Abstract
The formation of catalytically active nano-sized cobalt-containing structures in multicomponent hydrogenation systems based on Co(acac)2 complex and various cocatalysts, namely, AlEt3, AlEt2(OEt), Li-n-Bu, and (PhCH2)MgCl, has been studied for the first time in detail using dynamic EPR spectroscopy. It is shown that after mixing the initial components, paramagnetic structures are formed, which include a fragment containing Co(0) with the electronic configuration 3d9, as well as a fragment bearing an aluminium, lithium, or magnesium atom, depending on the nature of the used cocatalyst. Such bimetallic paramagnetic sites are stabilized by acetylacetonate ligands. In addition, the paramagnetic complex contains the arene molecule(s), and the cobalt atom is bonded with the atom of the corresponding non-transition through the alkyl group of the co-catalyst, in particular through the carbon atom in the α-position with respect to the atom of the non-transition element. Due to the high reactivity of the described intermediates, they, under the conditions of hydrogenation catalysis, are transformed into nano-sized cobalt-containing structures that act as carriers of the catalytically active sites. Furthermore, because of the high reactivity and paramagnetism, such intermediates can be detected only by the EPR technique. The paper describes the whole experimental way of interpreting the EPR signals corresponding to the intermediates, precursors of catalytically active structures. In addition, a possible mathematical model based on the obtained experimental EPR data is presented.
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6
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Hou Z, Vanecek AS, Tepe JJ, Odom AL. Synthesis, structure, properties, and cytotoxicity of a (quinoline)RuCp + complex. Dalton Trans 2023; 52:721-730. [PMID: 36562335 DOI: 10.1039/d2dt03484k] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A rare example of a structurally characterized metal quinoline complex was prepared using a non-covalent quinoline-based proteasome inhibitor (Quin1), and a related complex bearing an inactive quinoline ligand (Quin2) was also synthesized. The quinolines are prepared by a one-pot procedure involving titanium-catalyzed alkyne iminoamination and are bound to ruthenium by reaction with CpRu(NCMe)3+ PF6- in CH2Cl2. The arene of the quinoline is η6-bonded to the ruthenium metal center. The kinetics of quinoline displacement were investigated, and reactivity with deuterated solvents follows the order acetonitrile > DMSO > water. Quinolines with more methyl groups on the arene are more kinetically stable, and RuCp(Quin1)+ PF6- (1), which has two methyl groups on the arene, is stable for days in DMSO. In contrast, a very similar complex (2) made with Quin2 having no methyl groups on the arene was readily displaced by DMSO. Both 1 and 2 are stable in 9 : 1 water/DMSO for days with no measurable displacement of the quinoline. The cytotoxicity of the quinolines, their CpRu+-complexes, and CpRu(DMSO)3+ PF6- was investigated towards two multiple myeloma cell lines: MC/CAR and RPMI 8226. To determine whether the activity of the complexes was related to the nature of the quinoline ligands, two structurally similar quinoline ligands with vastly different biological properties were investigated. Quin1 is a cytotoxic proteasome inhibitor, whereas Quin2 is not a proteasome inhibitor and showed no discernable cytotoxicity. The ruthenium complexes showed poor cellular proteasome inhibition. However, both 1 and 2 showed good cytotoxicity towards RPMI 8226 and MC/CAR, with 1 being slightly more cytotoxic. For example, 1 has a CC50 = 2 μM in RPMI 8226, and 2 has a CC50 = 5 μM for the same cell line. In contrast, CpRu(DMSO)3+ PF6- was quite active towards MC/CAR with CC50 = 2.8 μM but showed no discernible cytotoxicity toward RPMI 8226. The mechanism of action responsible for the observed cytotoxicity is not known, but the new Ru(Cp)(Quin)+ PF6- complexes do not cross-link DNA as found for platinum-based drugs. It is concluded that the Ru(Cp)(Quin)+ PF6- complexes remain intact in the cellular assays and constitute a new class of cytotoxic metal complexes.
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Affiliation(s)
- Zhilin Hou
- Michigan State University, Department of Chemistry, 578 S. Shaw Ln, East Lansing, MI 48824, USA.
| | - Allison S Vanecek
- Michigan State University, Department of Chemistry, 578 S. Shaw Ln, East Lansing, MI 48824, USA.
| | - Jetze J Tepe
- Michigan State University, Department of Chemistry, 578 S. Shaw Ln, East Lansing, MI 48824, USA.
| | - Aaron L Odom
- Michigan State University, Department of Chemistry, 578 S. Shaw Ln, East Lansing, MI 48824, USA.
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7
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Pototskiy RA, Boym MA, Nelyubina YV, Perekalin D. Synthesis of the Sterically Shielded Rhodium(I) Arene Complex by Cycloaddition of the Phosphorous‐Substituted Alkyne. Z Anorg Allg Chem 2022. [DOI: 10.1002/zaac.202200231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Roman A Pototskiy
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN RUSSIAN FEDERATION
| | - Mikhail A Boym
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN RUSSIAN FEDERATION
| | - Yulia V Nelyubina
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN RUSSIAN FEDERATION
| | - Dmitry Perekalin
- A N Nesmeyanov Institute of Organoelement Compounds RAS: Institut elementoorganiceskih soedinenij imeni A N Nesmeanova RAN Laboratory of Functional Organometallic Compounds Vavilova 28 119991 Moscow RUSSIAN FEDERATION
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8
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New 1,3-disubstituted ferrocene. Russ Chem Bull 2022. [DOI: 10.1007/s11172-022-3420-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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9
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Siebenmann L, Bolliger R, Braband H, Blacque O, Alberto R. Watching Hydrogens Migrate: Step by Step from [Re I(η 6-C 6H 6) 2] + to [Re III(η 3-C 6H 9)(η 6-C 6H 6)(NCCH 3) 2] 2. Inorg Chem 2022; 61:3683-3689. [PMID: 35168329 DOI: 10.1021/acs.inorgchem.1c03811] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Arene substitution reactions in [M(η6-arene)2]0/2+ are well documented for Groups 6 and 8 but are essentially unknown for the manganese triad. Aiming to replace benzene in [ReI(η6-C6H6)2]+, we altered the hapticity of one coordinated benzene, which we found to be tunable stepwise from an η6 to an η3-allyl coordination mode. Reduction of [ReI(η6-C6H6)2]+ with hydrides gives [ReI(η5-C6H7)(η6-C6H6)]. Subsequent addition of acid yields [ReIIIH(η5-C6H7)(η6-C6H6)]+, which converts to [ReI(η4-C6H8)(η6-C6H6)NCCH3]+ in acetonitrile. Further protonation gives the title complex [ReIII(η3-C6H9)(η6-C6H6)(NCCH3)2]2+ by a rhenium-mediated, intramolecular hydride shift. Herein, we present a full mechanistic elucidation of these transformations based on NMR studies, isolation of reaction intermediates, and their full characterizations. The structural feature {ReIII(η6-C6H6)} is unprecedented. Direct arene exchange from [ReI(η6-C6H6)2]+ to [ReI(η6-arene)(η6-C6H6)]+ was found only under strongly acidic conditions in neat arene. The analogous chemistry of the lighter homologue technetium (99Tc) is distinctly different. Treatment of [TcI(η5-C6H7)(η6-C6H6)] with acid in acetonitrile yields only mixtures of [TcI(η6-C6H6)2]+ and [TcII(NCCH3)6]2+.
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Affiliation(s)
- Lukas Siebenmann
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Robin Bolliger
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Henrik Braband
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Olivier Blacque
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
| | - Roger Alberto
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland
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10
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Synthesis and antiproliferative activity of novel organometallic cobalt(III) complex encapsulated in polydiacetylene-phospholipid nanoformulation. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2021.120701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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11
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Nadeem Q, Battistin F, Blacque O, Alberto R. Naphthalene Exchange in [Re(η 6 -napht) 2 ] + with Pharmaceuticals Leads to Highly Functionalized Sandwich Complexes [M(η 6 -pharm) 2 ] + (M=Re/ 99m Tc). Chemistry 2021; 28:e202103566. [PMID: 34817903 PMCID: PMC9300139 DOI: 10.1002/chem.202103566] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Indexed: 01/07/2023]
Abstract
Bis‐arene sandwich complexes are generally prepared by the Fischer‐Hafner reaction, which conditions are incompatible with most O‐ and N‐ functional groups. We report a new way for the synthesis of sandwich type complexes [Re(η6‐arene)2]+ and [Re(η6‐arene)(η6‐benzene)]+ from [Re(η6‐napht)2]+ and [Re(η6‐napht)(η6‐benzene)]+, with functionalized arenes and pharmaceuticals. N‐methylpyrrolidine (NMP) facilitates the substitution of naphthalene with the incoming arene. A series of fully characterized rhenium sandwich complexes with simple arenes, such as aniline, as well as with active compounds like lidocaine and melatonin are presented. With these rhenium compounds in hand, the radioactive sandwich complexes [99mTc(η6‐pharm)2]+ (pharm=pharmaceutical) can be unambiguously confirmed. The direct labelling of pharmaceuticals with 99mTc through η6‐coordination to phenyl rings and the confirmation of the structures with the rhenium homologues opens a path into molecular theranostics.
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Affiliation(s)
- Qaisar Nadeem
- Department of Chemistry, University of Zurich, Winterthurerstr. 190, 8057, Zurich, Switzerland
| | - Federica Battistin
- Department of Chemistry, University of Zurich, Winterthurerstr. 190, 8057, Zurich, Switzerland
| | - Olivier Blacque
- Department of Chemistry, University of Zurich, Winterthurerstr. 190, 8057, Zurich, Switzerland
| | - Roger Alberto
- Department of Chemistry, University of Zurich, Winterthurerstr. 190, 8057, Zurich, Switzerland
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Abstract
Although the application of arene-osmium(II) complexes in homogeneous catalysis has been much less studied than that of their ruthenium analogues, different works have shown that, in some instances, a comparable or even superior effectiveness can be achieved with this particular class of compounds. This review article focuses on the catalytic applications of arene-osmium(II) complexes. Among others, transfer hydrogenation, hydrogenation, oxidation, and nitrile hydration reactions, as well as different C-C bond forming processes, are comprehensively discussed.
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13
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Long J, Kumar D, Deo C, Retailleau P, Dubacheva GV, Royal G, Xie J, Bogliotti N. Photo-/Electroinduced Irreversible Isomerization of 2,2'-Azobispyridine Ligands in Arene Ruthenium(II) Complexes. Chemistry 2021; 27:9563-9570. [PMID: 33780046 DOI: 10.1002/chem.202100142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Indexed: 11/07/2022]
Abstract
Novel arene RuII complexes containing 2,2'-azobispyridine ligands were synthesized and characterized by using 1 H and 13 C NMR spectroscopy, UV/vis spectroscopy, electrochemistry, DFT calculations and single-crystal X-ray diffraction. Z-configured complexes featuring unprecedented seven-membered chelate rings involving the nitrogen atom of both pyridines were isolated and were shown to undergo irreversible isomerization to the corresponding E-configured five-membered chelate complexes in response to light or electrochemical stimulus.
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Affiliation(s)
- Jonathan Long
- Université Paris-Saclay, ENS Paris-Saclay, CNRS Photophysique et Photochimie Supramoléculaires et Macromoléculaires, 91190, Gif-sur-Yvette, France
| | - Divyaratan Kumar
- Université Paris-Saclay, ENS Paris-Saclay, CNRS Photophysique et Photochimie Supramoléculaires et Macromoléculaires, 91190, Gif-sur-Yvette, France
| | - Claire Deo
- Université Paris-Saclay, ENS Paris-Saclay, CNRS Photophysique et Photochimie Supramoléculaires et Macromoléculaires, 91190, Gif-sur-Yvette, France
| | - Pascal Retailleau
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198, Gif-sur-Yvette, France
| | - Galina V Dubacheva
- Université Paris-Saclay, ENS Paris-Saclay, CNRS Photophysique et Photochimie Supramoléculaires et Macromoléculaires, 91190, Gif-sur-Yvette, France.,Université Grenoble Alpes, CNRS Département de Chimie Moléculaire (UMR5250), F38400, Grenoble, France
| | - Guy Royal
- Université Grenoble Alpes, CNRS Département de Chimie Moléculaire (UMR5250), F38400, Grenoble, France
| | - Juan Xie
- Université Paris-Saclay, ENS Paris-Saclay, CNRS Photophysique et Photochimie Supramoléculaires et Macromoléculaires, 91190, Gif-sur-Yvette, France
| | - Nicolas Bogliotti
- Université Paris-Saclay, ENS Paris-Saclay, CNRS Photophysique et Photochimie Supramoléculaires et Macromoléculaires, 91190, Gif-sur-Yvette, France
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14
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Shvydkiy NV, Perekalin DS. Cyclobutadiene cobalt complexes as catalysts for insertion of diazo compounds into X–H bonds. MENDELEEV COMMUNICATIONS 2021. [DOI: 10.1016/j.mencom.2021.04.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Cyclobutadiene cobalt complexes as catalysts for insertion of diazo compounds into X–H bonds. MENDELEEV COMMUNICATIONS 2021. [DOI: 10.1016/j.mencom.2021.05.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Aluminum Species and the Synthesis Mechanism of AlCl 3–CuCl–Arene Solutions. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.0c05222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Gloriozov IP, Dem'yanov PI, Zhulyaev NS, Nechaev MS, Oprunenko YF, Gam F, Saillard JY, Kuznetsov AE. DFT Investigation of the η 6 ⇌ η 6-Inter-ring Haptotropic Rearrangement of the Group 8 Metals Complexes [(graphene)MCp] + (M = Fe, Ru, Os). J Phys Chem A 2021; 125:366-375. [PMID: 33356252 DOI: 10.1021/acs.jpca.0c08251] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Metalcyclopentadienyl complexes (MCp)+ (M = Fe, Ru, Os) bound to the large polyaromatic hydrogenated hydrocarbon (PAH) C96H24 used as a model for pristine graphene have been studied using a density functional theory (DFT) generalized gradient approximation (PBE functional) to reveal their structural features and dynamic behavior. The inter-ring haptotropic rearrangements (IRHRs) for these complexes were shown to occur via two transition states and one intermediate. The energy barriers of the η6 ⇌ η6 IRHRs of the (MCp)+ unit were found to be 30, 27, and 29 kcal/mol for M = Fe, Ru, and Os, respectively. These values are significantly lower than the values found previously for smaller PAHs. Both polar and nonpolar solvents were found not to affect significantly the energy barrier heights. Investigated transition metal complexes could be used in general as catalysts in the design of novel derivatives or materials with promising properties. Metalcyclopentadienyl complexes (MCp)+ of PAHs show catalytic properties mainly due to their structural details as well as their important characteristic of inter-ring haptotropic rearrangement. IRHRs take place usually by intramolecular mechanisms. During IRHRs, the MLn organometallic groups (OMGs) undergo shifting along the PAH plane and could coordinate additional reagents, which is important for catalysis. Large PAHs such as graphene, fullerenes, and nanotubes possess intrinsic anticancer activity, and numerous arene complexes of Ru and Os have been proven to have anticancer properties as well. We suppose that coordinating Ru or Os to very large PAHs could synergistically increase the anticancer activity of resulting complexes.
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Affiliation(s)
- Igor P Gloriozov
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, Building 3, 119991 Moscow, Russia
| | - Piotr I Dem'yanov
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, Building 3, 119991 Moscow, Russia
| | - Nikolay S Zhulyaev
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, Building 3, 119991 Moscow, Russia
| | - Mikhail S Nechaev
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, Building 3, 119991 Moscow, Russia.,A. V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky Prospect 29, 119991 Moscow, Russia
| | - Yuri F Oprunenko
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, Building 3, 119991 Moscow, Russia
| | - Franck Gam
- ISCR-UMR 6226, Université Rennes, CNRS, F-35000 Rennes, France
| | | | - Aleksey E Kuznetsov
- Department of Chemistry, Universidad Técnica Federico Santa Maria, Av. Santa Maria 6400, Vitacura, 7660251 Santiago, Chile
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Cobalt(II) Complexes Based on Benzylmalonate Anions Exhibiting Field-Induced Single-Ion Magnet Slow Relaxation Behavior. CRYSTALS 2020. [DOI: 10.3390/cryst10121130] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The reaction of (NBu4)2Bzmal (where Bzmal2− is benzylmalonate dianion) with Co(OAc)2∙4H2O gives the [Co(Bzmal)(EtOH)(H2O)]n 2D-polymer (1). The addition of 2,2′-bipyridine (bpy) to the starting system results in the [Co(Bzmal)(bpy)2]·H2O·EtOH molecular complex (2). Their molecular and crystal structures were analyzed by single-crystal X-ray crystallography. An analysis of the static magnetic data supported by the SA-CASSCF/NEVPT2 calculations revealed the presence of easy-plane magnetic anisotropy in both complexes. The AC susceptibility data confirm that both complexes show a slow field-induced (HDC = 1000 Oe) magnetic relaxation behavior.
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Two different faces of the triangular cluster Rh3Cp3(μ2-CO)3 towards metalloelectrophiles: Structural and theoretical study. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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