1
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Bortolamiol E, Fama F, Zhang Z, Demitri N, Cavallo L, Caligiuri I, Rizzolio F, Scattolin T, Visentin F. Cationic palladium(II)-indenyl complexes bearing phosphines as ancillary ligands: synthesis, and study of indenyl amination and anticancer activity. Dalton Trans 2022; 51:11135-11151. [PMID: 35801510 DOI: 10.1039/d2dt01821g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactivity of palladium(II) indenyl derivatives and their applications are topics relatively less studied, though in recent times these compounds have been used as pre-catalysts able to promote challenging cross-coupling processes. Herein, we propose the first systematic study concerning the nucleophilic attack on the palladium(II) coordinated indenyl fragment and, for this purpose, we have prepared a library of new Pd-indenyl complexes bearing mono- or bidentate phosphines as spectator ligands, developing specific synthetic strategies. All novel compounds are thoroughly characterized, highlighting that the indenyl ligand presents always a hapticity intermediate between η3 and η5. Secondary amines have been chosen as nucleophiles for the present study and indenyl amination has been monitored by UV-Vis and NMR spectroscopies, deriving a second order rate law, with dependence on both complex and amine concentrations. The rate-determining step of the process is the initial attack of the amine to the coordinated indenyl fragment, and this conclusion has been supported also by DFT calculations. The determination of second order rate constants has allowed us to assess the impact of the phosphine ligands on the kinetics of the process and identify the steric and electronic descriptors most suitable for predicting the reactivity of these systems. Finally, in vitro tests have proven that these organometallic compounds promote antiproliferative activity towards ovarian cancer cells better than cisplatin and possibly by adopting a different mechanism of action.
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Affiliation(s)
- Enrica Bortolamiol
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari, Campus Scientifico Via Torino 155, 30174 Venezia-Mestre, Italy.
| | - Francesco Fama
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari, Campus Scientifico Via Torino 155, 30174 Venezia-Mestre, Italy.
| | - Ziyun Zhang
- Department KAUST Catalysis Centre, KCC, King Abdullah University of Science and Technology, Thuwal-23955-6900, Saudi Arabia
| | - Nicola Demitri
- Elettra - Sincrotrone Trieste, S.S. 14 Km 163.5 in Area Science Park, 34149 Basovizza, Trieste, Italy
| | - Luigi Cavallo
- Department KAUST Catalysis Centre, KCC, King Abdullah University of Science and Technology, Thuwal-23955-6900, Saudi Arabia
| | - Isabella Caligiuri
- Pathology Unit, Centro di Riferimento Oncologico di Aviano (C.R.O.) IRCCS, via Franco Gallini 2, 33081, Aviano, Italy.
| | - Flavio Rizzolio
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari, Campus Scientifico Via Torino 155, 30174 Venezia-Mestre, Italy. .,Pathology Unit, Centro di Riferimento Oncologico di Aviano (C.R.O.) IRCCS, via Franco Gallini 2, 33081, Aviano, Italy.
| | - Thomas Scattolin
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, via Marzolo 1, 35131 Padova, Italy.
| | - Fabiano Visentin
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari, Campus Scientifico Via Torino 155, 30174 Venezia-Mestre, Italy.
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2
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Synthesis and characterization of organopalladium(II) complexes of N,N,S–tridentate sulfur-containing Schiff bases derived from 2-(2-pyridyl)benzothiazolines. Polyhedron 2022. [DOI: 10.1016/j.poly.2021.115635] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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3
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Mori M, Sunatsuki Y, Suzuki T. Sterically Demanding 8-(Diphenylphosphino)quinoline Complexes of Group 10 Metal(II): Synthesis, Crystal Structures, and Properties in Solution. Inorg Chem 2020; 59:18225-18240. [PMID: 33249844 DOI: 10.1021/acs.inorgchem.0c02706] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Several series of platinum(II), palladium(II), and nickel(II) complexes bearing 8-(diphenylphosphino)quinoline (PQH) or its 2-methyl or 2-phenyl derivatives (PQMe or PQPh) were synthesized, and their crystal structures and behaviors in solution were investigated. Most of the complexes [M(PQR)2]X2 (MII = PtII, PdII, or NiII; R = H, Me or Ph; X = monoanionic ions) characterized in this study have an approximately square-planar coordination geometry with two bidentate P,N-chelating or monodentate P-donating quinolylphosphine ligands in the cis(P,P) configuration. A large steric requirement from the Me or Ph substituent introduced at the 2-position of the quinoline ring gives the resulting complexes severe distortion. The PtII and PdII complex cations maintained the square-planar coordination geometry, but the MII center was displaced from the chelating ligand plane. This bending of the chelate coordination makes the M-N(quinoline) bond weaker, as demonstrated by the longer M-N bonds. In accord with the bond weakening, the partial dissociation of the PQH or PQMe chelates by substitution with halide anions were observed using UV-vis spectroscopy and X-ray crystallography. In contrast, the PQPh complexes were stable in solution toward the addition of halide anions; the intramolecular π-π stacking interaction between the coordinating quinolyl and the 2-substituted phenyl rings protects the MII center from nucleophilic attack. In the corresponding NiII complexes, the steric congestion arising from the mutually cis-positioned PQR ligands resulted in a large tetrahedral distortion around the NiII center. However, the intramolecular π-π stacking interaction was still effective in the PQPh complex, and this interaction can explain some unusual robustness and electrochemical properties of the NiII-PQPh complex.
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Affiliation(s)
- Masatoshi Mori
- Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan
| | - Yukinari Sunatsuki
- Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan
| | - Takayoshi Suzuki
- Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan.,Research Institute for Interdisciplinary Science, Okayama University, Okayama 700-8530, Japan
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4
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Mori M, Suzuki T. Mixed-ligand platinum(II) complexes containing 2-(2′-pyridyl)phenyl and 8-quinolylphosphines: Synthesis and molecular structures in the crystals and in solution. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119862] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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5
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Scattolin T, Bortolamiol E, Visentin F, Palazzolo S, Caligiuri I, Perin T, Canzonieri V, Demitri N, Rizzolio F, Togni A. Palladium(II)-η 3 -Allyl Complexes Bearing N-Trifluoromethyl N-Heterocyclic Carbenes: A New Generation of Anticancer Agents that Restrain the Growth of High-Grade Serous Ovarian Cancer Tumoroids. Chemistry 2020; 26:11868-11876. [PMID: 32368809 DOI: 10.1002/chem.202002199] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Indexed: 01/14/2023]
Abstract
The first palladium organometallic compounds bearing N-trifluoromethyl N-heterocyclic carbenes have been synthesized. These η3 -allyl complexes are potent antiproliferative agents against different cancer lines (for the most part, IC50 values fall in the range 0.02-0.5 μm). By choosing 1,3,5-triaza-7-phosphaadamantane (PTA) as co-ligand, we can improve the selectivity toward tumor cells, whereas the introduction of 2-methyl substituents generally reduces the antitumor activity slightly. A series of biochemical assays, aimed at defining the cellular targets of these palladium complexes, has shown that mitochondria are damaged before DNA, thus revealing a behavior substantially different from that of cisplatin and its derivatives. We assume that the specific mechanism of action of these organometallic compounds involves nucleophilic attack on the η3 -allyl fragment. The effectiveness of a representative complex, 4 c, was verified on ovarian cancer tumoroids derived from patients. The results are promising: unlike carboplatin, our compound turned out to be very active and showed a low toxicity toward normal liver organoids.
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Affiliation(s)
- Thomas Scattolin
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281,S-3, 9000, Ghent, Belgium
| | - Enrica Bortolamiol
- Department of Molecular Sciences and Nanosystems, Università Ca' Foscari, Campus Scientifico Via Torino 155, 30174, Venezia-Mestre, Italy
| | - Fabiano Visentin
- Department of Molecular Sciences and Nanosystems, Università Ca' Foscari, Campus Scientifico Via Torino 155, 30174, Venezia-Mestre, Italy
| | - Stefano Palazzolo
- Pathology Unit, Department of Molecular Biology and Translational Research, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, via Franco Gallini 2, 33081, Aviano, Italy
| | - Isabella Caligiuri
- Pathology Unit, Department of Molecular Biology and Translational Research, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, via Franco Gallini 2, 33081, Aviano, Italy
| | - Tiziana Perin
- Pathology Unit, Department of Molecular Biology and Translational Research, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, via Franco Gallini 2, 33081, Aviano, Italy
| | - Vincenzo Canzonieri
- Pathology Unit, Department of Molecular Biology and Translational Research, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, via Franco Gallini 2, 33081, Aviano, Italy.,Department of Medical, Surgical and Health Sciences, Università degli Studi di Trieste, Strada di Fiume 447, Trieste, Italy
| | - Nicola Demitri
- Elettra-Sincrotrone Trieste, S.S. 14 Km 163.5, Area Science Park Basovizza, 34149, Trieste, Italy
| | - Flavio Rizzolio
- Department of Molecular Sciences and Nanosystems, Università Ca' Foscari, Campus Scientifico Via Torino 155, 30174, Venezia-Mestre, Italy.,Pathology Unit, Department of Molecular Biology and Translational Research, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, via Franco Gallini 2, 33081, Aviano, Italy
| | - Antonio Togni
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, ETH Zürich, Vladimir-Prelog-Weg 2, 8093, Zürich, Switzerland
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6
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Scattolin T, Bortolamiol E, Caligiuri I, Rizzolio F, Demitri N, Visentin F. Synthesis and comparative study of the anticancer activity of η3-allyl palladium(II) complexes bearing N-heterocyclic carbenes as ancillary ligands. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114607] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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7
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Scattolin T, Bortolamiol E, Rizzolio F, Demitri N, Visentin F. Allyl palladium complexes bearing carbohydrate‐based
N
‐heterocyclic carbenes: Anticancer agents for selective and potent
in vitro
cytotoxicity. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5876] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Thomas Scattolin
- Department of Chemistry and Center for Sustainable Chemistry Ghent University Krijgslaan 281 (S‐3) Ghent 9000 Belgium
| | - Enrica Bortolamiol
- Dipartimento di Scienze Molecolari e Nanosistemi Università Ca' Foscari Campus Scientifico Via Torino 155 Venezia‐Mestre 30174 Italy
| | - Flavio Rizzolio
- Dipartimento di Scienze Molecolari e Nanosistemi Università Ca' Foscari Campus Scientifico Via Torino 155 Venezia‐Mestre 30174 Italy
- Pathology unit Centro di Riferimento Oncologico di Aviano (CRO) IRCCS via F. Gallini 2 Aviano 33081 Italy
| | - Nicola Demitri
- Hard X‐ray Diffraction Beamlines Elettra Sincrotrone Trieste S.S. 14 Km 163.5 in Area Science Park, Basovizza Trieste 34149 Italy
| | - Fabiano Visentin
- Dipartimento di Scienze Molecolari e Nanosistemi Università Ca' Foscari Campus Scientifico Via Torino 155 Venezia‐Mestre 30174 Italy
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8
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Olefin-tethered organoruthenium carbene complexes: Synthesis, X-ray structure and catalytic insights on hydrogenation of esters. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.10.017] [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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9
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Scattolin T, Caligiuri I, Canovese L, Demitri N, Gambari R, Lampronti I, Rizzolio F, Santo C, Visentin F. Synthesis of new allyl palladium complexes bearing purine-based NHC ligands with antiproliferative and proapoptotic activities on human ovarian cancer cell lines. Dalton Trans 2018; 47:13616-13630. [PMID: 30207339 DOI: 10.1039/c8dt01831f] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A series of new palladium allyl complexes bearing purine-based carbenes derived from caffeine, theophylline and theobromine have been prepared and characterized by NMR spectroscopy, and elemental analysis and in two cases by single crystal X-ray diffraction. The cytotoxic and proapoptotic activities of compounds have been determined in vitro on human ovarian cancer A2780 and SKOV-3 cell lines. These experiments have shown that the palladium-allyl fragment induces a general cytotoxicity, but the choice of the supporting ligands is of paramount importance for achieving the best results. In particular complexes 4c, 4d and 5d exhibit a higher antiproliferative effect (IC50: 0.09, 0.81 and 0.85 μM respectively) than cisplatin (IC50: 1.5 μM) on A2780 cells, and 4d (IC50: 1.7 μM vs. 5.94 μM) on SKOV-3 cell line. Moreover in many cases it has been proved that the cytotoxicity of our complexes is associated with the induction of apoptosis.
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Affiliation(s)
- Thomas Scattolin
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca' Foscari, Campus Scientifico Via Torino 155, 30174 Venezia-Mestre, Italy.
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10
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Hopkins JA, Lionetti D, Day VW, Blakemore JD. Chemical and Electrochemical Properties of [Cp*Rh] Complexes Supported by a Hybrid Phosphine-Imine Ligand. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00551] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Julie A. Hopkins
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, United States
| | - Davide Lionetti
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, United States
| | - Victor W. Day
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, United States
| | - James D. Blakemore
- Department of Chemistry, University of Kansas, 1251 Wescoe Hall Drive, Lawrence, Kansas 66045, United States
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11
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Hazlehurst RJ, Hendriks SW, Boyle PD, Blacquiere JM. Ligand Dynamics and Aerobic Allylic Oxidation with Bifunctional Ni(NHC) Complexes. ChemistrySelect 2017. [DOI: 10.1002/slct.201701609] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Richard J. Hazlehurst
- Department of Chemistry; University of Western Ontario; London, Ontario, Canada, N6 A 5B7
| | - Scott W.E. Hendriks
- Department of Chemistry; University of Western Ontario; London, Ontario, Canada, N6 A 5B7
| | - Paul D. Boyle
- Department of Chemistry; University of Western Ontario; London, Ontario, Canada, N6 A 5B7
| | - Johanna M. Blacquiere
- Department of Chemistry; University of Western Ontario; London, Ontario, Canada, N6 A 5B7
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12
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Canovese L, Visentin F, Scattolin T, Santo C, Bertolasi V. Synthesis and reactivity toward olefin exchange and oxidative addition of some platinum(0) olefin complexes with thioquinolines as spectator ligands. Polyhedron 2017. [DOI: 10.1016/j.poly.2017.03.053] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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13
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Scattolin T, Visentin F, Santo C, Bertolasi V, Canovese L. Isocyanide insertion across the Pd–C bond of allenyl and propargyl palladium complexes bearing phosphoquinoline as a spectator ligand. Synthesis of a palladium complex bearing a coordinated cyclobutenyl fragment. Dalton Trans 2017; 46:5210-5217. [PMID: 28374876 DOI: 10.1039/c7dt00454k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A palladium complex bearing a cyclobutenyl group directly coordinated to metal has been obtained as a result of the insertion of an isocyanide across the Pd–C bond.
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Affiliation(s)
- Thomas Scattolin
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari
- Venice
- Italy
| | - Fabiano Visentin
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari
- Venice
- Italy
| | - Claudio Santo
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari
- Venice
- Italy
| | - Valerio Bertolasi
- Dipartimento di Scienze Chimiche e Farmaceutiche
- Università di Ferrara
- Ferrara
- Italy
| | - Luciano Canovese
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari
- Venice
- Italy
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14
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Synthesis, characterization and a reactivity study of some allyl palladium complexes bearing bidentate hemi-labile carbene or mixed carbene/PPh3 ligands. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.08.051] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Oxidative addition of organic halides on palladium(0) complexes stabilized by dimethylfumarate and quinoline-based N–P or N–S spectator ligands. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.07.049] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Canovese L, Visentin F, Biz C, Scattolin T, Santo C, Bertolasi V. Oxidative addition of allyl and propargyl halides on palladium(0) complexes bearing bidentate ligands with quinolinic structure. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.01.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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17
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Suzuki T, Yamaguchi H, Fujiki M, Hashimoto A, Takagi HD. Crystal structures of di-chlorido-palladium(II), -platinum(II) and -rhodium(III) complexes containing 8-(di-phenyl-phosphan-yl)quinoline. Acta Crystallogr E Crystallogr Commun 2015; 71:447-51. [PMID: 25995852 PMCID: PMC4420072 DOI: 10.1107/s2056989015006076] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2015] [Accepted: 03/25/2015] [Indexed: 11/10/2022]
Abstract
The crystal structures of di-chlorido-palladium(II), -platinum(II) and -rhodium(III) complexes containing 8-(di-phenyl-phosphan-yl)quinoline, (SP-4)-[PdCl2(C21H16NP)], (1) [systematic name: di-chlor-ido-(8-di-phenyl-phosphanyl-quinoline)-palladium(II)], (SP-4)-[PtCl2(C21H16NP)]·CH2Cl2, (2) [systematic name: di-chlorido-(8-di-phenyl-phos-phanyl-quinoline)-platinum(II) dichlorometh-ane monosolvate], and (OC-6-32)-[RhCl2(C21H16NP)2]PF6·0.5CH2Cl2·0.5CH3OH, (3) [systematic name: cis-di-chlor-ido-bis-(8-di-phenyl-phosphanyl-quinoline)-rhodium(III) hexa-fluorido-phos-phate di-chloro-methane/-methanol hemisolvate] are reported. In these complexes, the phosphanyl-quinoline acts as a bidentate ligand, forming a planar asymmetrical five-membered chelate ring. The palladium(II) and platinum(II) complex mol-ecules in (1) and (2), respectively, show a typical square-planar coordination geometry and form a dimeric structure through an inter-molecular π-π stacking inter-action between the quinolyl rings. The centroid-centroid distances between the stacked six-membered rings in (1) and (2) are 3.633 (2) and 3.644 (2) Å, respectively. The cationic rhodium(III) complex in (3) has a cis(Cl),cis(P),cis(N) (OC-6-32) configuration of the ligands, in which two kinds of intra-molecular π-π stacking inter-actions are observed: between the quinolyl and phenyl rings and between two phenyl rings, the centroid-centroid distances being 3.458 (2) and 3.717 (2) Å, respectively. The PF6 (-) anion in (3) is rotationally disordered, the site occupancies of each F atom being 0.613 (14) and 0.387 (14). The CH2Cl2 and CH3OH solvent mol-ecules are also disordered and equal site occupancies of 0.5 are assumed.
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Affiliation(s)
- Takayoshi Suzuki
- Department of Chemistry, Okayama University, Okayama 700-8530, Japan
| | - Hiroshi Yamaguchi
- Graduate School of Science and Research Center for Material Science, Nagoya, University, Chikusa, Nagoya 464-8602, Japan
| | - Masayuki Fujiki
- Graduate School of Science and Research Center for Material Science, Nagoya, University, Chikusa, Nagoya 464-8602, Japan
| | - Akira Hashimoto
- Graduate School of Science and Research Center for Material Science, Nagoya, University, Chikusa, Nagoya 464-8602, Japan
| | - Hideo D. Takagi
- Graduate School of Science and Research Center for Material Science, Nagoya, University, Chikusa, Nagoya 464-8602, Japan
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18
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Canovese L, Visentin F, Scattolin T, Santo C, Bertolasi V. The addition of bromine and iodine to palladacyclopentadienyl complexes bearing bidentate heteroditopic P−N spectator ligands derived from differently substituted quinolinic frames. The unexpected evolution of the reaction. Dalton Trans 2015; 44:15049-58. [DOI: 10.1039/c5dt01884f] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The palladacyclopentadienyl complexes with substituted phosphoquinolines react with halogens giving σ-butadienyl or a zwitterionic derivative depending on the ligand structure.
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Affiliation(s)
- Luciano Canovese
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari
- Venice
- Italy
| | - Fabiano Visentin
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari
- Venice
- Italy
| | - Thomas Scattolin
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari
- Venice
- Italy
| | - Claudio Santo
- Dipartimento di Scienze Molecolari e Nanosistemi
- Università Ca’ Foscari
- Venice
- Italy
| | - Valerio Bertolasi
- Dipartimento di Chimica e Centro di Strutturistica Diffrattometrica
- Università di Ferrara
- Ferrara
- Italy
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19
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Canovese L, Visentin F, Santo C, Bertolasi V. Insertion of Isocyanides across the Pd–C Bond of Phosphinoquinoline Allyl Palladium Complexes Bearing η1- and η3-Coordinated Allyl Groups. A Synthetic and Mechanistic Study. Organometallics 2014. [DOI: 10.1021/om500057h] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- L. Canovese
- Dipartimento
di Scienze Molecolari e Nanosistemi, Università Ca’ Foscari, Venice, Italy
| | - F. Visentin
- Dipartimento
di Scienze Molecolari e Nanosistemi, Università Ca’ Foscari, Venice, Italy
| | - C. Santo
- Dipartimento
di Scienze Molecolari e Nanosistemi, Università Ca’ Foscari, Venice, Italy
| | - V. Bertolasi
- Dipartimento
di Chimica e Centro di Strutturistica Diffrattometrica, Università di Ferrara, Ferrara, Italy
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20
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Synthesis of novel palladium allyl complexes bearing heteroditopic NHC–S ligands. Kinetic study on the carbene exchange between bis-carbene palladium allyl complexes. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2013.01.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Ding N, Zhang W, Hor TSA. One-step entry to olefin-tethered N,S-heterocyclic carbene complexes of ruthenium with mixed ligands. Dalton Trans 2012; 41:5988-94. [PMID: 22481574 DOI: 10.1039/c2dt12354a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of Ru(II) mixed-ligand complexes RuBr(2)(PPh(3))(2)(N-AyBzTh) (Ay = prop-2-enyl; BzTh = benzothiazol-2-ylidene) (4), RuBr(OAc)(PPh(3))(N-MeAyBzTh) (5), RuBr(OAc)(PPh(3))(N-MeBnBzTh)(2) (MeBn = 3-methylbut-2-enyl) (6) and RuCl(OAc)(PPh(3))(N-MeBnBzTh) (7) have been synthesized from Ru(OAc)(2)(PPh(3))(2) in one-pot condensation and ligand exchange reactions. X-ray single-crystal diffraction analysis revealed that they are neutral octahedral Ru(II) complexes with one or two N,S-heterocyclic carbene (NSHC) ligands and a coordinated (4, 5 and 7) or dangling (6) olefin arm. The system displays a range of self-selecting structural variations. Entry of the hybrid olefin-NSHC and halide ligands ejects either one (5, 6 and 7) phosphine ligand or keeps both phosphines (4) by replacing the acetate. It is also possible to accommodate two NSHC ligands by keeping the olefin pendant (6). Complexes 5 and 7 are isostructural with all different ligands on the coordination sphere. Complexes 4-6 are active towards transfer hydrosilylation showing good β(Z) selectivity, with the Ru(II) bearing acetate giving higher yields.
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Affiliation(s)
- Nini Ding
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Singapore
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Crociani B, Antonaroli S, Paoli P, Rossi P. η1-Allylpalladium complexes with a tridentate PNP ligand with different phosphino groups. Dalton Trans 2012; 41:12490-500. [DOI: 10.1039/c2dt30746d] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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de Boer SY, Gloaguen Y, Reek JNH, Lutz M, van der Vlugt JI. N–H bond activation by palladium(ii) and copper(i) complexes featuring a reactive bidentate PN-ligand. Dalton Trans 2012; 41:11276-83. [DOI: 10.1039/c2dt31009k] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Canovese L, Visentin F, Levi C, Santo C, Bertolasi V. Facile synthesis and reactivity study of mixed phosphane–isocyanide Pd(II) and Pd(0) complexes. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2011.09.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Mendoza-Espinosa D, Donnadieu B, Bertrand G. Facile preparation of homo- and hetero-dimetallic complexes with a 4-phosphino-substituted NHC ligand. Toward the design of multifunctional catalysts. Chem Asian J 2011; 6:1099-103. [PMID: 21322115 PMCID: PMC3118523 DOI: 10.1002/asia.201000856] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Indexed: 11/10/2022]
Abstract
A series of bimetallic complexes have been synthesized that are supported by a 4-phosphino-substituted NHC ligand. The use of this stable ligand reduces the number of synthetic steps and allows for a wide range of metal combinations to be introduced into the complexes.
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Affiliation(s)
- Daniel Mendoza-Espinosa
- UCR-CNRS Joint Research Chemistry Laboratory, Department of Chemistry, University of California, Riverside, 92521-0403, USA
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Canovese L, Visentin F, Levi C, Dolmella A. Synthesis, characterization, dynamics and reactivity toward amination of η3-allyl palladium complexes bearing mixed ancillary ligands. evaluation of the electronic characteristics of the ligands from kinetic data. Dalton Trans 2011; 40:966-81. [DOI: 10.1039/c0dt00811g] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Sadimenko AP. Organometallic Complexes of Phosphinopyridines and Related Ligands. ADVANCES IN HETEROCYCLIC CHEMISTRY VOLUME 104 2011. [DOI: 10.1016/b978-0-12-388406-0.00003-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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