1
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Swaminathan S, Haribabu J, Kalagatur NK, Nikhil M, Balakrishnan N, Bhuvanesh NSP, Kadirvelu K, Kolandaivel P, Karvembu R. Tunable Anticancer Activity of Furoylthiourea-Based Ru II -Arene Complexes and Their Mechanism of Action. Chemistry 2021; 27:7418-7433. [PMID: 33404126 DOI: 10.1002/chem.202004954] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 12/21/2020] [Indexed: 11/08/2022]
Abstract
Fourteen new RuII -arene (p-cymene/benzene) complexes (C1-C14) have been synthesized by varying the N-terminal substituent in the furoylthiourea ligand and satisfactorily characterized by using analytical and spectroscopic techniques. Electrostatic potential maps predicted that the electronic effect of the substituents was mostly localized, with some influence seen on the labile chloride ligands. The structure-activity relationships of the Ru-p-cymene and Ru-benzene complexes showed opposite trends. All the complexes were found to be highly toxic towards IMR-32 cancer cells, with C5 (Ru-p-cymene complex containing C6 H2 (CH3 )3 as N-terminal substituent) and C13 (Ru-benzene complex containing C6 H4 (CF3 ) as N-terminal substituent) showing the highest activity among each set of complexes, and hence they were chosen for further study. These complexes showed different behavior in aqueous solutions, and were also found to catalytically oxidize glutathione. They also promoted cell death by apoptosis and cell cycle arrest. Furthermore, the complexes showed good binding ability with the receptors Pim-1 kinase and vascular endothelial growth factor receptor 2, commonly overexpressed in cancer cells.
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Affiliation(s)
- Srividya Swaminathan
- Department of Chemistry, National Institute of Technology, Tiruchirappalli, 620015, Tamil Nadu, India
| | - Jebiti Haribabu
- Department of Chemistry, National Institute of Technology, Tiruchirappalli, 620015, Tamil Nadu, India
| | - Naveen Kumar Kalagatur
- DRDO-BU Centre for Life Sciences, Bharathiar University Campus, Coimbatore, 641046, Tamil Nadu, India
| | - Maroli Nikhil
- Centre for Condensed Matter Theory, Department of Physics, Indian Institute of Science, Bangalore, 560012, Karnataka, India
| | - Nithya Balakrishnan
- Department of Chemistry, National Institute of Technology, Tiruchirappalli, 620015, Tamil Nadu, India
| | | | - Krishna Kadirvelu
- DRDO-BU Centre for Life Sciences, Bharathiar University Campus, Coimbatore, 641046, Tamil Nadu, India
| | | | - Ramasamy Karvembu
- Department of Chemistry, National Institute of Technology, Tiruchirappalli, 620015, Tamil Nadu, India
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2
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Ruthenium (II) β-diketimine as hydroamination catalyst, crystal structure and DFT computations. TRANSIT METAL CHEM 2021. [DOI: 10.1007/s11243-021-00456-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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3
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Ielo L, Castoldi L, Touqeer S, Lombino J, Roller A, Prandi C, Holzer W, Pace V. Halogen‐Imparted Reactivity in Lithium Carbenoid Mediated Homologations of Imine Surrogates: Direct Assembly of bis‐Trifluoromethyl‐β‐Diketiminates and the Dual Role of LiCH
2
I. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007954] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Laura Ielo
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Laura Castoldi
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Saad Touqeer
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Jessica Lombino
- Fondazione Ri.MED Via Bandiera 11 90133 Palermo Italy
- University of Palermo Department STEBICEF Via Archirafi 32 90123 Palermo Italy
| | - Alexander Roller
- University of Vienna X-Ray Structure Analysis Center Waehringerstrasse 42 1090 Vienna Austria
| | - Cristina Prandi
- University of Turin Department of Chemistry Via P. Giuria 7 10125 Turin Italy
| | - Wolfgang Holzer
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Vittorio Pace
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
- University of Turin Department of Chemistry Via P. Giuria 7 10125 Turin Italy
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4
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Ielo L, Castoldi L, Touqeer S, Lombino J, Roller A, Prandi C, Holzer W, Pace V. Halogen‐Imparted Reactivity in Lithium Carbenoid Mediated Homologations of Imine Surrogates: Direct Assembly of bis‐Trifluoromethyl‐β‐Diketiminates and the Dual Role of LiCH
2
I. Angew Chem Int Ed Engl 2020; 59:20852-20857. [DOI: 10.1002/anie.202007954] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2020] [Revised: 07/17/2020] [Indexed: 12/21/2022]
Affiliation(s)
- Laura Ielo
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Laura Castoldi
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Saad Touqeer
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Jessica Lombino
- Fondazione Ri.MED Via Bandiera 11 90133 Palermo Italy
- University of Palermo Department STEBICEF Via Archirafi 32 90123 Palermo Italy
| | - Alexander Roller
- University of Vienna X-Ray Structure Analysis Center Waehringerstrasse 42 1090 Vienna Austria
| | - Cristina Prandi
- University of Turin Department of Chemistry Via P. Giuria 7 10125 Turin Italy
| | - Wolfgang Holzer
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
| | - Vittorio Pace
- University of Vienna Department of Pharmaceutical Chemistry Althanstrasse 14 1090 Vienna Austria
- University of Turin Department of Chemistry Via P. Giuria 7 10125 Turin Italy
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5
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O’Connor C, Lawlor DC, Robinson C, Müller-Bunz H, Phillips AD. Comprehensive Experimental and Computational Study of η6-Arene Ruthenium(II) and Osmium(II) Complexes Supported by Sulfur Analogues of the β-Diketiminate Ligand. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00111] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Crystal O’Connor
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Darren C. Lawlor
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Conor Robinson
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Helge Müller-Bunz
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
| | - Andrew D. Phillips
- School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland
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6
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Sinha V, Pribanic B, de Bruin B, Trincado M, Grützmacher H. Ligand- and Metal-Based Reactivity of a Neutral Ruthenium Diolefin Diazadiene Complex: The Innocent, the Guilty and the Suspicious. Chemistry 2018; 24:5513-5521. [PMID: 29341297 PMCID: PMC5947567 DOI: 10.1002/chem.201705957] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Indexed: 11/17/2022]
Abstract
Coordination of the diazadiene diolefin ligand (trop2 dad) to ruthenium leads to various complexes of composition [Ru(trop2 dad)(L)]. DFT studies indicate that the closed-shell singlet (CSS), open-shell singlet (OSS), and triplet electronic structures of this species are close in energy, with the OSS spin configuration being the lowest in energy for all tested functionals. Singlet-state CASSCF calculations revealed a significant multireference character for these complexes. The closed-shell singlet wavefunction dominates, but these complexes have a significant (≈8-16 %) open-shell singlet [d7 -RuI (L)(trop2 dad.- )] contribution mixed into the ground state. In agreement with their ambivalent electronic structure, these complexes reveal both metal- and ligand-centered reactivity. Most notable are the reactions with AdN3 , diazomethane, and a phosphaalkyne leading to scission of the C-C bond of the diazadiene (dad) moiety of the trop2 dad ligand, resulting in net (formal) nitrene, carbene, or P≡C insertion in the dad C-C bond, respectively. Supporting DFT studies revealed that several of the ligand-based reactions proceed via low-barrier radical-type pathways, involving the dad.- ligand radical character of the OSS or triplet species.
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Affiliation(s)
- Vivek Sinha
- Supramolecular and Homogeneous Catalysis GroupVan 't Hoff Institute for Molecular Sciences (HIMS)University of AmsterdamScience park 9041098XHAmsterdamThe Netherlands
| | - Bruno Pribanic
- Department of Chemistry and Applied Biosciences ETH ZürichLaboratory of Inorganic ChemistryVladimir-Prelog-Weg 1ZürichCH-8093Switzerland
| | - Bas de Bruin
- Supramolecular and Homogeneous Catalysis GroupVan 't Hoff Institute for Molecular Sciences (HIMS)University of AmsterdamScience park 9041098XHAmsterdamThe Netherlands
| | - Monica Trincado
- Department of Chemistry and Applied Biosciences ETH ZürichLaboratory of Inorganic ChemistryVladimir-Prelog-Weg 1ZürichCH-8093Switzerland
| | - Hansjörg Grützmacher
- Department of Chemistry and Applied Biosciences ETH ZürichLaboratory of Inorganic ChemistryVladimir-Prelog-Weg 1ZürichCH-8093Switzerland
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7
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Sinopalnikova IS, Peganova TA, Belkova NV, Deydier E, Daran JC, Shubina ES, Kalsin AM, Poli R. Ruthenium p
-Cymene Iminophosphonamide Complexes: Activation under Basic Conditions and Transfer Hydrogenation Catalysis. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701344] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Iana S. Sinopalnikova
- LCC-CNRS; Université de Toulouse, CNRS, UPS, INPT; 205 Route de Narbonne 31077 Toulouse Cedex 4 France
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
| | - Tatyana A. Peganova
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
| | - Natalia V. Belkova
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
| | - Eric Deydier
- LCC-CNRS; Université de Toulouse, CNRS, UPS, INPT; 205 Route de Narbonne 31077 Toulouse Cedex 4 France
| | - Jean-Claude Daran
- LCC-CNRS; Université de Toulouse, CNRS, UPS, INPT; 205 Route de Narbonne 31077 Toulouse Cedex 4 France
| | - Elena S. Shubina
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
| | - Alexander M. Kalsin
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
| | - Rinaldo Poli
- LCC-CNRS; Université de Toulouse, CNRS, UPS, INPT; 205 Route de Narbonne 31077 Toulouse Cedex 4 France
- Institut Universitaire de France; 1, rue Descartes 75231 Paris Cedex 05 France
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8
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Sinopalnikova IS, Peganova TA, Novikov VV, Fedyanin IV, Filippov OA, Belkova NV, Shubina ES, Poli R, Kalsin AM. Coordinatively Labile 18-Electron Arene Ruthenium Iminophosphonamide Complexes. Chemistry 2017; 23:15424-15435. [DOI: 10.1002/chem.201702862] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Iana S. Sinopalnikova
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
- Laboratoire de Chimie de Coordination CNRS; Université de Toulouse, UPS, INPT; 205 Route de Narbonne 31077 Toulouse Cedex 4 France
| | - Tat'yana A. Peganova
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
| | - Valentin V. Novikov
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
| | - Ivan V. Fedyanin
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
| | - Oleg A. Filippov
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
| | - Natalia V. Belkova
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
| | - Elena S. Shubina
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
| | - Rinaldo Poli
- Laboratoire de Chimie de Coordination CNRS; Université de Toulouse, UPS, INPT; 205 Route de Narbonne 31077 Toulouse Cedex 4 France
- Institut Universitaire de France; 1, rue Descartes 75231 Paris Cedex 05 France
| | - Alexander M. Kalsin
- A. N. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; 28 Vavilov str. 119991 Moscow Russia
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9
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Myers JT, Smith JA, Dakermanji SJ, Wilde JH, Wilson KB, Shivokevich PJ, Harman WD. Molybdenum(0) Dihapto-Coordination of Benzene and Trifluorotoluene: The Stabilizing and Chemo-Directing Influence of a CF 3 Group. J Am Chem Soc 2017; 139:11392-11400. [PMID: 28742967 DOI: 10.1021/jacs.7b05009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The preparation of the complexes TpMo(NO)(DMAP)(η2-PhCF3) (5) and TpMo(NO)(DMAP)(η2-benzene) (3) is described. The CF3 group is found to stabilize the metal-arene bond strength in 5 by roughly 3 kcal/mol compared to that in 3, allowing the large-scale synthesis and isolation of the trifluorotoluene analogue (5, 37 g, 70%). When a benzene solution of 5 is allowed to stand, clean conversion to the benzene analogue 3 occurs, and this complex may be precipitated from solution upon the addition of pentane and isolated. The trifluorotoluene complex is shown to be a synthetic precursor to functionalized cyclohexadienes: In solution, it selectively protonates at the ortho position, and the resulting η2-arenium species undergoes reactions with nucleophiles at the adjacent meta carbon. Thus, reactions of 5, triflic acid, and either N-methylpyrrole or 1-methoxy-2-methyl-1-(trimethylsilyloxy)-1-propene result in 5-substituted-1,3-cyclohexadienes after removal of the metal.
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Affiliation(s)
- Jeffery T Myers
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| | - Jacob A Smith
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| | - Steven J Dakermanji
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| | - Justin H Wilde
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| | - Katy B Wilson
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| | - Philip J Shivokevich
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
| | - W Dean Harman
- Department of Chemistry, University of Virginia , Charlottesville, Virginia 22904, United States
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10
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Wilson KB, Myers JT, Nedzbala HS, Combee LA, Sabat M, Harman WD. Sequential Tandem Addition to a Tungsten–Trifluorotoluene Complex: A Versatile Method for the Preparation of Highly Functionalized Trifluoromethylated Cyclohexenes. J Am Chem Soc 2017; 139:11401-11412. [DOI: 10.1021/jacs.7b05118] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Katy B. Wilson
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Jeffery T. Myers
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Hannah S. Nedzbala
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Logan A. Combee
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Michal Sabat
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
| | - W. Dean Harman
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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11
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Broomfield LM, Alonso-Moreno C, Martin E, Shafir A, Posadas I, Ceña V, Castro-Osma JA. Aminophosphine ligands as a privileged platform for development of antitumoral ruthenium(ii) arene complexes. Dalton Trans 2017; 46:16113-16125. [DOI: 10.1039/c7dt03369a] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The potential utility of aminophosphine ligands in both high-throughput testing and rational design of new anticancer metallodrugs.
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Affiliation(s)
- L. M. Broomfield
- Institute of Chemical Research of Catalonia (ICIQ)
- Barcelona Institute of Science and Technology
- Tarragona
- Spain
| | - C. Alonso-Moreno
- Departamento de Química Inorgánica
- Orgánica y Bioquímica
- Facultad de Farmacia
- Universidad de Castilla-La Man-cha
- 02071-Albacete
| | - E. Martin
- Institute of Chemical Research of Catalonia (ICIQ)
- Barcelona Institute of Science and Technology
- Tarragona
- Spain
| | - A. Shafir
- Institute of Chemical Research of Catalonia (ICIQ)
- Barcelona Institute of Science and Technology
- Tarragona
- Spain
| | - I. Posadas
- CIBERNED
- Instituto de Salud Carlos III
- Madrid
- Spain
- Unidad Asociada Neurodeath CSIC-UCLM
| | - V. Ceña
- CIBERNED
- Instituto de Salud Carlos III
- Madrid
- Spain
- Unidad Asociada Neurodeath CSIC-UCLM
| | - J. A. Castro-Osma
- Departamento de Química Inorgánica
- Orgánica y Bioquímica
- Facultad de Farmacia
- Universidad de Castilla-La Man-cha
- 02071-Albacete
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12
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Lin TH, Das K, Datta A, Leu WJ, Hsiao HC, Lin CH, Guh JH, Huang JH. Synthesis and characterization of ruthenium compounds incorporating keto-amine ligands. The applications of catalytic transfer hydrogenation and cancer cell inhibition. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.01.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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13
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Peganova TA, Sinopalnikova IS, Peregudov AS, Fedyanin IV, Demonceau A, Ustynyuk NA, Kalsin AM. The half-sandwich 18- and 16-electron arene ruthenium iminophosphonamide complexes. Dalton Trans 2016; 45:17030-17041. [DOI: 10.1039/c6dt03202h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Novel arene ruthenium iminophosphonamides are electron-rich complexes due to a strong σ,π-donor zwitterionic ligand.
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Affiliation(s)
- Tat'yana A. Peganova
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russia
| | - Iana S. Sinopalnikova
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russia
| | - Alexander S. Peregudov
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russia
| | - Ivan V. Fedyanin
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russia
| | - Albert Demonceau
- Laboratory of Macromolecular Chemistry and Organic Catalysis
- Department of Chemistry
- University of Liège
- 4000 Liège
- Belgium
| | - Nikolai A. Ustynyuk
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russia
| | - Alexander M. Kalsin
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- 119991 Moscow
- Russia
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14
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Camp C, Arnold J. On the non-innocence of “Nacnacs”: ligand-based reactivity in β-diketiminate supported coordination compounds. Dalton Trans 2016; 45:14462-98. [DOI: 10.1039/c6dt02013e] [Citation(s) in RCA: 133] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
While β-diketiminate (BDI or ‘nacnac’) ligands have been widely adopted to stabilize a wide range of metal ions in multiple oxidation states and coordination numbers, in several occurrences these ligands do not behave as spectators and participate in reactivity.
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Affiliation(s)
- Clément Camp
- Univ Lyon
- CNRS, ESCPE Lyon
- Université Claude Bernard Lyon 1
- C2P2 UMR 5265
- F-69616 Villeurbanne
| | - John Arnold
- Department of Chemistry
- University of California
- Berkeley
- USA
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15
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Chen C, Bellows SM, Holland PL. Tuning steric and electronic effects in transition-metal β-diketiminate complexes. Dalton Trans 2015; 44:16654-70. [PMID: 26244489 DOI: 10.1039/c5dt02215k] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
β-Diketiminates are widely used supporting ligands for building a range of metal complexes with different oxidation states, structures, and reactivities. This Perspective summarizes the steric and electronic influences of ligand substituents on these complexes, with an eye toward informing the design of new complexes with optimized properties. The backbone and N-aryl substituents can give significant steric effects on structure, reactivity and selectivity of reactions. The electron density on the metal can be tuned by installation of electron withdrawing or donating groups on the β-diketiminate ligand as well. Examples are shown from throughout the transition metal series to demonstrate different types of effects attributable to systematic variation of β-diketiminate ligands.
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Affiliation(s)
- Chi Chen
- Department of Chemistry, Yale University, New Haven, Connecticut 06511, USA.
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16
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Hong Y, Zheng Y, Xue M, Yao Y, Zhang Y, Shen Q. Phenylene-bridged β-Ketoiminate Dilanthanide Aryloxides: Synthesis, Structure, and Catalytic Activity for Addition of Amines to Carbodiimides. Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201500047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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17
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Chang YH, Leu WJ, Datta A, Hsiao HC, Lin CH, Guh JH, Huang JH. Catalytic transfer hydrogenation and anticancer activity of arene–ruthenium compounds incorporating bi-dentate precursors. Dalton Trans 2015; 44:16107-18. [DOI: 10.1039/c5dt01310k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of arene–Ru compounds were synthesized and their catalytic transfer hydrogenation and anticancer activity towards human hormone-refractory prostate cancer were investigated.
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Affiliation(s)
- Yu-Hsiang Chang
- Department of Chemistry
- National Changhua University of Education
- Changhua
- Taiwan 50058
| | - Wohn-Jenn Leu
- School of Pharmacy
- National Taiwan University
- Taipei
- Taiwan 100
| | - Amitabha Datta
- Department of Chemistry
- National Changhua University of Education
- Changhua
- Taiwan 50058
| | - Hung-Chang Hsiao
- Department of Chemistry
- National Changhua University of Education
- Changhua
- Taiwan 50058
| | - Chia-Her Lin
- Department of Chemistry
- Chung-Yuan Christian University
- Chun-Li 320
- Taiwan
| | - Jih-Hwa Guh
- School of Pharmacy
- National Taiwan University
- Taipei
- Taiwan 100
| | - Jui-Hsien Huang
- Department of Chemistry
- National Changhua University of Education
- Changhua
- Taiwan 50058
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18
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Morris WD, Wolczanski PT, Sutter J, Meyer K, Cundari TR, Lobkovsky EB. Iron and chromium complexes containing tridentate chelates based on nacnac and imino- and methyl-pyridine components: triggering C-X bond formation. Inorg Chem 2014; 53:7467-84. [PMID: 25010819 DOI: 10.1021/ic500807y] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Nacnac-based tridentate ligands containing a pyridyl-methyl and a 2,6-dialkyl-phenylamine (i.e., (2,6-R2-C6H3N═C(Me)CH═C(Me)NH(CH2py); R = Et, {Et(nn)PM}H; R = (i)Pr, {(i)Pr(nn)PM}H) were synthesized by condensation routes. Treatment of M{N(TMS)2}THFn (M = Cr, n = 2; M = Fe, Co, n = 1; TMS = trimethylsilane; THF = tetrahydrofuran) with {(i)Pr(nn)PM}H) afforded {(i)Pr(nn)PM}MN(TMS)2 (1-M(iPr); M = Cr, Fe); {Et(nn)PM}MN(TMS)2 (1-M(Et); M = Fe, Co) was similarly obtained. {R(nn)PM}FeBr (R = (i)Pr, Et; 2-Fe(R)) were prepared from FeBr2 and {R(nn)PM}Li, and alkylated to generate {R(nn)PM}Fe(neo)Pe (R = (i)Pr, Et; 3-Fe(R)). Carbonylation of 3-Fe(R) provided {(i)Pr(nn)PM}Fe(CO(neo)Pe)CO (4-Fe(iPr)), and carbonylations of 1-Fe(R) (R = Et, (i)Pr) and 1-Cr(iPr) induced deamination to afford {R(nn)PI}Fe(CO)2 (R = (i)Pr, 5-Fe(iPr); Et, 5-Fe(Et)), where PI is pyridine-imine, and {κ(2)-N,N-pyrim-pyr}Cr(CO)4 (6-Cr(iPr)), in which the aryl-amide side of the nacnac attacked the incipient PI group. Carbon-carbon bonds were formed at the imine carbon of the {R(nn)PI} ligand. Addition of [{(i)Pr(nn)PI}(2-)](K(+)(THF)x)2 to FeCl3 generated {(i)Pr(nn)CHpy}2Fe2Cl2 (7-Fe(iPr)), and TMSN3 induced the deamination of 1-Fe(Et), but with disproportionation to provide {[Et(nn)CHpy]2}Fe (8-Fe(Et)). Ph2CN2 induced C-C bond formation with 1-Fe(iPr) via its thermal degradation to ultimately afford {(i)Pr(nn)CHpy}2(FeN═CPh2)2 (9-Fe(iPr)). The compounds were examined by X-ray crystallography (1-M(iPr), M = Cr, Fe; 1-Co(Et); 2-Fe(iPr); 4-Fe(iPr); 5-Fe(iPr); 6-Cr(iPr); 7-Fe(iPr); 8-Fe(Et); 9-Fe(iPr)), Mössbauer spectroscopy, and NMR spectroscopy. Structural parameters assessing redox noninnocence are discussed, as are structural and mechanistic consequences of the various electronic environments.
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Affiliation(s)
- Wesley D Morris
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University , Ithaca, New York 14853, United States
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19
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Influence of PPh3 moiety in the anticancer activity of new organometallic ruthenium complexes. J Inorg Biochem 2014; 136:1-12. [DOI: 10.1016/j.jinorgbio.2014.03.002] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2013] [Revised: 03/03/2014] [Accepted: 03/06/2014] [Indexed: 11/23/2022]
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20
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Williams VA, Wolczanski PT, Sutter J, Meyer K, Lobkovsky EB, Cundari TR. Iron complexes derived from {nacnac-(CH2py)2}- and {nacnac-(CH2py)(CHpy)}n ligands: stabilization of iron(II) via redox noninnocence. Inorg Chem 2014; 53:4459-74. [PMID: 24762120 DOI: 10.1021/ic5001123] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nacnac-based tetradentate chelates, {nacnac-(CH2py)2}(-) ({nn(PM)2}(-)) and {nacnac-(CH2py)(CHpy)}(n) ({nn(PM)(PI)}(n)) have been investigated in iron complexes. Treatment of Fe{N(TMS)2}2(THF) with {nn(PM)2}H afforded {nn(PM)2}FeN(TMS)2 [1-N(TMS)2], which led to {nn(PM)2}FeCl (1-Cl) from HCl and to {nn(PM)2}FeN3 (1-N3) upon salt metathesis. Dehydroamination of 1-N(TMS)2 was induced by L (L = PMe3, CO) to afford {nn(PM)(PI)}Fe(PMe3)2 [2-(PMe3)2] and {nn(PM)(PI)}FeCO (3-CO). Substitution of 2-(PMe3)2 led to {nn(PM)(PI)}Fe(PMe3)CO [2-(PMe3)CO], and exposure to a vacuum provided {nn(PM)(PI)}Fe(PMe3) (3-PMe3). Metathesis routes to {nn(PM)(PI)}FeL2 (2-L2; L = PMe3, PMe2Ph) and {nn(PM)(PI)}FeL (3-L; L = PMePh2, PPh3) from [{nn(PM)(PI)}(2-)]Li2 and FeBr2(THF)2 in the presence of L proved feasible, and 1e(-) and 2e(-) oxidation of 2-(PMe3)2 afforded 2(+)-(PMe3)2 and 2(2+)-(PMe3)2 salts. Mössbauer spectroscopy, structural studies, and calculational assessments revealed the dominance of iron(II) in both high-spin (1-X) and low-spin (2-L2 and 3-L) environments, and the redox noninnocence (RNI) of {nn(PM)(PI)}(n) [2-L2, 3-L, n = 2-; 2(+)-(PMe3)2, n = 1-; 2(2+)-(PMe3)2, n = 0]. A discussion regarding the utility of RNI in chemical reactivity is proffered.
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Affiliation(s)
- Valerie A Williams
- Baker Laboratory, Department of Chemistry & Chemical Biology, Cornell University , Ithaca, New York 14853, United States
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21
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Zheng Y, Jiao R, Shen X, Xue M, Yao Y, Zhang Y, Shen Q. Bis(β‐diketiminato) lanthanide amides: synthesis, structure and catalysis for the polymerization of
l
‐lactide and ε‐caprolactone. Appl Organomet Chem 2014. [DOI: 10.1002/aoc.3150] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yu Zheng
- Key Laboratory of Organic Synthesis of Jiangsu ProvinceCollege of ChemistryChemical Engineering and Materials ScienceSoochow University Suzhou 215123 People's Republic of China
| | - Rui Jiao
- Key Laboratory of Organic Synthesis of Jiangsu ProvinceCollege of ChemistryChemical Engineering and Materials ScienceSoochow University Suzhou 215123 People's Republic of China
| | - Xiao‐dong Shen
- Key Laboratory of Organic Synthesis of Jiangsu ProvinceCollege of ChemistryChemical Engineering and Materials ScienceSoochow University Suzhou 215123 People's Republic of China
| | - Ming‐qiang Xue
- Key Laboratory of Organic Synthesis of Jiangsu ProvinceCollege of ChemistryChemical Engineering and Materials ScienceSoochow University Suzhou 215123 People's Republic of China
| | - Ying‐ming Yao
- Key Laboratory of Organic Synthesis of Jiangsu ProvinceCollege of ChemistryChemical Engineering and Materials ScienceSoochow University Suzhou 215123 People's Republic of China
| | - Yong Zhang
- Key Laboratory of Organic Synthesis of Jiangsu ProvinceCollege of ChemistryChemical Engineering and Materials ScienceSoochow University Suzhou 215123 People's Republic of China
| | - Qi Shen
- Key Laboratory of Organic Synthesis of Jiangsu ProvinceCollege of ChemistryChemical Engineering and Materials ScienceSoochow University Suzhou 215123 People's Republic of China
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22
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Singh SK, Pandey DS. Multifaceted half-sandwich arene–ruthenium complexes: interactions with biomolecules, photoactivation, and multinuclearity approach. RSC Adv 2014. [DOI: 10.1039/c3ra44131h] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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23
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Annibale VT, Batcup R, Bai T, Hughes SJ, Song D. RuCp* Complexes of Ambidentate 4,5-Diazafluorene Derivatives: From Linkage Isomers to Coordination-Driven Self-Assembly. Organometallics 2013. [DOI: 10.1021/om400846f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Vincent T. Annibale
- Davenport Chemical Research
Laboratories, Department of Chemistry, University of Toronto, 80 St. George
Street, Toronto, Ontario, Canada M5S 3H6
| | - Rhys Batcup
- Davenport Chemical Research
Laboratories, Department of Chemistry, University of Toronto, 80 St. George
Street, Toronto, Ontario, Canada M5S 3H6
| | - Tao Bai
- Davenport Chemical Research
Laboratories, Department of Chemistry, University of Toronto, 80 St. George
Street, Toronto, Ontario, Canada M5S 3H6
| | - Sarah J. Hughes
- Davenport Chemical Research
Laboratories, Department of Chemistry, University of Toronto, 80 St. George
Street, Toronto, Ontario, Canada M5S 3H6
| | - Datong Song
- Davenport Chemical Research
Laboratories, Department of Chemistry, University of Toronto, 80 St. George
Street, Toronto, Ontario, Canada M5S 3H6
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24
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Cai LX, Yao YM, Xue MQ, Zhang Y, Shen Q. β-Diketiminatoytterbium aryloxides: synthesis, structural characterization, and catalytic activity for addition of amines to carbodiimides. Appl Organomet Chem 2013. [DOI: 10.1002/aoc.2996] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ling-xia Cai
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Ying-ming Yao
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Ming-qiang Xue
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Yong Zhang
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
| | - Qi Shen
- College of Chemistry, Chemical Engineering and Materials Science; Soochow University; Suzhou 215123 People's Republic of China
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25
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Gamble AJ, Lynam JM, Thatcher RJ, Walton PH, Whitwood AC. cis-1,3,5-Triaminocyclohexane as a facially capping ligand for ruthenium(II). Inorg Chem 2013; 52:4517-27. [PMID: 23517123 DOI: 10.1021/ic302819j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Reaction of cis-[RuCl2(DMSO-S)3(DMSO-O)] with cis-1,3,5-triaminocyclohexane (tach) results in the formation of [RuCl(tach)(DMSO-S)2]Cl, a valuable precursor for a wide range of other tach-containing Ru complexes. Reaction of [RuCl(tach)(DMSO-S)2]Cl with the chelating nitrogen-based ligands (N-N = bipyridine, phenanthroline, and ethylenediamine) affords [Ru(N-N)(DMSO-S)2(tach)][Cl]2. A similar reaction between [RuCl(tach)(DMSO-S)]Cl with the chelating phosphorus-based ligands (P-P = dppm, dppe, dppp, dppb, dppv, and dppben) leads to the formation of [RuCl(P-P)(tach)]Cl. The structures of 10 examples of the tach-containing complexes have been determined by single crystal X-ray diffraction. An examination of the structural metrics obtained from these studies indicates that the tach ligand is a strong sigma donor. In addition, the presence of the NH2 groups in the tach ligand allow for participation in hydrogen bonding further modulating the coordinative properties of the ligand.
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Affiliation(s)
- Aimee J Gamble
- Department of Chemistry, University of York, Heslington, York, YO10 5DD, UK
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26
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Synthesis, characterization, electrochemical behavior and in vitro protein tyrosine kinase inhibitory activity of the cymene-halogenobenzohydroxamato [Ru(η6-cymene)(bha)Cl] complexes. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2012.12.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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27
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Zhu D, Budzelaar PHM. N-Aryl β-diiminate complexes of the platinum metals. Dalton Trans 2013; 42:11343-54. [DOI: 10.1039/c3dt50715g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Shen X, Xue M, Jiao R, Ma Y, Zhang Y, Shen Q. Bis(β-diketiminate) Rare-Earth-Metal Borohydrides: Syntheses, Structures, and Catalysis for the Polymerizations of l-Lactide, ε-Caprolactone, and Methyl Methacrylate. Organometallics 2012. [DOI: 10.1021/om3005299] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiaodong Shen
- Key Laboratory of
Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s
Republic of China
| | - Mingqiang Xue
- Key Laboratory of
Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s
Republic of China
| | - Rui Jiao
- Key Laboratory of
Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s
Republic of China
| | - Yong Ma
- Key Laboratory of
Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s
Republic of China
| | - Yong Zhang
- Key Laboratory of
Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s
Republic of China
| | - Qi Shen
- Key Laboratory of
Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People’s
Republic of China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences,
Shanghai 200032, People’s Republic of China
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29
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Savjani N, Schormann M, Bochmann M. Structural variation in gold(I)-chelate systems: Synthesis of an asymmetrically bridged β-diketiminato complex of gold. Polyhedron 2012. [DOI: 10.1016/j.poly.2012.02.026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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30
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Phillips AD, Thommes K, Scopelliti R, Gandolfi C, Albrecht M, Severin K, Schreiber DF, Dyson PJ. Modulating the Steric, Electronic, and Catalytic Properties of Cp* Ruthenium Half-Sandwich Complexes with β-Diketiminato Ligands. Organometallics 2011. [DOI: 10.1021/om2006479] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andrew D. Phillips
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
- School
of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Katrin Thommes
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Rosario Scopelliti
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Claudio Gandolfi
- Department of Chemistry, University of Fribourg, Chemin du Musée 9, CH-1700 Fribourg,
Switzerland
| | - Martin Albrecht
- School
of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
- Department of Chemistry, University of Fribourg, Chemin du Musée 9, CH-1700 Fribourg,
Switzerland
| | - Kay Severin
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Dominique F. Schreiber
- School
of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Paul J. Dyson
- Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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31
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Schreiber DF, Ortin Y, Müller-Bunz H, Phillips AD. Application of Electron-Withdrawing Coordinatively Unsaturated η6-Arene β-Diketiminato–Ruthenium Complexes in Lewis Acid Catalyzed Diels–Alder Reactions. Organometallics 2011. [DOI: 10.1021/om200566a] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dominique F. Schreiber
- School of Chemistry and Chemical Biology, University College Dublin, Belfield Dublin 4, Ireland
| | - Yannick Ortin
- School of Chemistry and Chemical Biology, University College Dublin, Belfield Dublin 4, Ireland
| | - Helge Müller-Bunz
- School of Chemistry and Chemical Biology, University College Dublin, Belfield Dublin 4, Ireland
| | - Andrew D. Phillips
- School of Chemistry and Chemical Biology, University College Dublin, Belfield Dublin 4, Ireland
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32
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Kennedy DC, Patrick BO, James BR. Cationic ruthenium(III) maltolato–imidazole complexes — Synthesis, characterization, and antiproliferatory activity*Adapted from the Ph.D. thesis of D.C. Kennedy (see the References section). CAN J CHEM 2011. [DOI: 10.1139/v11-074] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The cationic RuIII complexes, trans-[Ru(ma)2(L)2]CF3SO3, where Hma = maltol = 3-hydroxy-2-methyl-4-pyrone; L = imidazole (Im) (complex 2), 1(N)-methylimidazole (N-MeIm) (3), 2-methylimidazole (2-MeIm) (4), and 4-methylimidazole (4-MeIm) (5), were synthesized via the known L = EtOH (complex 1a), and characterized by elemental analysis, 1H NMR and IR spectroscopies, mass spectrometry, cyclic voltammetry, and (for 3 and 4) by X-ray crystallography. The trans-[Ru(ma)2(H2O)2]CF3SO3 complex (1b) was inadvertently isolated and characterized crystallographically, and the monomaltolato species [Ru(ma)(N-MeIm)4][CF3SO3]2 (6) was also isolated and characterized. In vitro antiproliferatory activity of complexes 2−6 against human breast cancer cells (MDA-MB-435S) was tested using an MTT assay: 4 and 5 exhibit the lowest IC50 values, ~5 and ~15 µmol/L, respectively, whereas cisplatin exhibits an IC50 value of ~35 µmol/L against this cell line.
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Affiliation(s)
- David C. Kennedy
- Department of Chemistry, The University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Brian O. Patrick
- Department of Chemistry, The University of British Columbia, Vancouver, BC V6T 1Z1, Canada
| | - Brian R. James
- Department of Chemistry, The University of British Columbia, Vancouver, BC V6T 1Z1, Canada
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