151
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Cramer SA, Sturgill FL, Chandrachud PP, Jenkins DM. Overcoming NHCs neutrality: installing tetracarbenes on group 13 and 14 metals. Dalton Trans 2014; 43:7687-90. [DOI: 10.1039/c4dt00990h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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152
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Lohr TL, Piers WE, Sgro MJ, Parvez M. Silver ion enhanced C–H activation in Pt(ii) hydroxo complexes. Dalton Trans 2014; 43:13858-64. [DOI: 10.1039/c4dt01934b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Addition of stoichiometric Ag(i) salt to monomeric Pt(ii) hydroxo complexes supported by a bulky diimine ligand results in significantly enhanced rates of C–H activation relative to the silver free systems.
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Affiliation(s)
- Tracy L. Lohr
- Department of Chemistry
- University of Calgary
- Calgary, Canada
| | | | | | - Masood Parvez
- Department of Chemistry
- University of Calgary
- Calgary, Canada
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153
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Tsipis AC, Karapetsas IN. Accurate prediction of 195Pt NMR chemical shifts for a series of Pt(ii) and Pt(iv) antitumor agents by a non-relativistic DFT computational protocol. Dalton Trans 2014; 43:5409-26. [DOI: 10.1039/c3dt53594k] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Exhaustive benchmark DFT calculations reveal that the non-relativistic GIAO-PBE0/SARC-ZORA(Pt)∪6-31+G(d)(E) computational protocol predicts accurate 195Pt NMR chemical shifts for a wide range of square planar Pt(ii) and octahedral Pt(iv) anticancer agents.
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Affiliation(s)
- Athanassios C. Tsipis
- Laboratory of Inorganic and General Chemistry
- Department of Chemistry
- University of Ioannina
- , Greece
| | - Ioannis N. Karapetsas
- Laboratory of Inorganic and General Chemistry
- Department of Chemistry
- University of Ioannina
- , Greece
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154
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Pages BJ, Li F, Wormell P, Ang DL, Clegg JK, Kepert CJ, Spare LK, Danchaiwijit S, Aldrich-Wright JR. Synthesis and analysis of the anticancer activity of platinum(ii) complexes incorporating dipyridoquinoxaline variants. Dalton Trans 2014; 43:15566-75. [DOI: 10.1039/c4dt02133a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Platinum complexes incorporating variants of dpq were synthesised. Their DNA affinity and cytotoxicity were compared to complexes containing phen variants, revealing unexpected trends in biological activity.
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Affiliation(s)
- Benjamin J. Pages
- Nanoscale Organisation and Dynamics Group
- University of Western Sydney
- Penrith South DC, Australia
- School of Science and Health
- University of Western Sydney
| | - Feng Li
- Nanoscale Organisation and Dynamics Group
- University of Western Sydney
- Penrith South DC, Australia
- School of Science and Health
- University of Western Sydney
| | - Paul Wormell
- School of Science and Health
- University of Western Sydney
- Penrith, Australia
| | - Dale L. Ang
- Nanoscale Organisation and Dynamics Group
- University of Western Sydney
- Penrith South DC, Australia
- School of Science and Health
- University of Western Sydney
| | - Jack K. Clegg
- School of Chemistry and Molecular Biosciences
- The University of Queensland
- St Lucia, Australia
| | | | - Lawson K. Spare
- Nanoscale Organisation and Dynamics Group
- University of Western Sydney
- Penrith South DC, Australia
- School of Science and Health
- University of Western Sydney
| | - Supawich Danchaiwijit
- Nanoscale Organisation and Dynamics Group
- University of Western Sydney
- Penrith South DC, Australia
- School of Science and Health
- University of Western Sydney
| | - Janice R. Aldrich-Wright
- Nanoscale Organisation and Dynamics Group
- University of Western Sydney
- Penrith South DC, Australia
- School of Science and Health
- University of Western Sydney
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155
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Armbruster F, Augenstein T, Oña-Burgos P, Breher F. Homoleptic Tetrakis(silyl) Complexes of Pd0and Pt0Featuring Metal-Centred Heterocubane Structures: Evidence for the Existence of the Corresponding Mononuclear PdIand PtIComplexes. Chemistry 2013; 19:17899-906. [DOI: 10.1002/chem.201303299] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Indexed: 11/10/2022]
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156
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Vicenzi D, Sgarbossa P, Biffis A, Tubaro C, Basato M, Michelin RA, Lanza A, Nestola F, Bogialli S, Pastore P, Venzo A. Platinum(II) Complexes with Novel Diisocyanide Ligands: Catalysts in Alkyne Hydroarylation. Organometallics 2013. [DOI: 10.1021/om400859q] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Daniele Vicenzi
- Dipartimento
di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Paolo Sgarbossa
- Dipartimento
di Ingegneria Industriale, Università di Padova, Via Marzolo
9, 35131 Padova, Italy
| | - Andrea Biffis
- Dipartimento
di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Cristina Tubaro
- Dipartimento
di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Marino Basato
- Dipartimento
di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Rino A. Michelin
- Dipartimento
di Ingegneria Industriale, Università di Padova, Via Marzolo
9, 35131 Padova, Italy
| | - Arianna Lanza
- Dipartimento
di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Fabrizio Nestola
- Dipartimento
di Geoscienze, Università di Padova, Via Gradenigo 6, 35131 Padova, Italy
| | - Sara Bogialli
- Dipartimento
di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Paolo Pastore
- Dipartimento
di Scienze Chimiche, Università di Padova, Via Marzolo 1, 35131 Padova, Italy
| | - Alfonso Venzo
- IENI-CNR,
Dipartimento di Scienze Chimiche, Università di Padova, Via Marzolo
1, 35131 Padova, Italy
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157
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Jantke D, Marziale AN, Reiner T, Kraus F, Herdtweck E, Raba A, Eppinger J. Synthetic strategies for efficient conjugation of organometallic complexes with pendant protein reactive markers. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2013.05.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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158
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Cavigliasso G, Stranger R, Lo WK, Crowley JD, Blackman AG. The nature of species derived from [Pt(bipy)2]2+ in aqueous solution: X-ray structural, mass spectral, NMR, and computational studies. Polyhedron 2013. [DOI: 10.1016/j.poly.2013.05.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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159
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Miodragović ÐU, Quentzel JA, Kurutz JW, Stern CL, Ahn RW, Kandela I, Mazar A, O’Halloran TV. Robust structure and reactivity of aqueous arsenous acid-platinum(II) anticancer complexes. Angew Chem Int Ed Engl 2013; 52:10749-52. [PMID: 24038962 PMCID: PMC3932145 DOI: 10.1002/anie.201303251] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Revised: 07/04/2013] [Indexed: 11/10/2022]
Abstract
The first molecular adducts of platinum and arsenic based anticancer drugs - arsenoplatins - show unanticipated structure, substitution chemistry, and cellular cytotoxicity. The PtII-AsIII bonds in these complexes are stable in aqueous solution and strongly influence the lability of the trans ligand.
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Affiliation(s)
- Ðenana U. Miodragović
- Chemistry of Life Processes Institute and Department of Chemistry Northwestern University 2145 Sheridan Road, Evanston, IL, 60208 (USA)
| | - Jeremy A. Quentzel
- Chemistry of Life Processes Institute and Department of Chemistry Northwestern University 2145 Sheridan Road, Evanston, IL, 60208 (USA)
| | - Josh W. Kurutz
- Chemistry of Life Processes Institute and Department of Chemistry Northwestern University 2145 Sheridan Road, Evanston, IL, 60208 (USA)
| | - Charlotte L. Stern
- Chemistry of Life Processes Institute and Department of Chemistry Northwestern University 2145 Sheridan Road, Evanston, IL, 60208 (USA)
| | - Richard W. Ahn
- Chemistry of Life Processes Institute and Department of Chemistry Northwestern University 2145 Sheridan Road, Evanston, IL, 60208 (USA)
| | - Irawati Kandela
- Chemistry of Life Processes Institute and Department of Chemistry Northwestern University 2145 Sheridan Road, Evanston, IL, 60208 (USA)
| | - Andrew Mazar
- Chemistry of Life Processes Institute and Department of Chemistry Northwestern University 2145 Sheridan Road, Evanston, IL, 60208 (USA)
| | - Thomas V. O’Halloran
- Chemistry of Life Processes Institute and Department of Chemistry Northwestern University 2145 Sheridan Road, Evanston, IL, 60208 (USA)
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160
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Mironov OA, Bischof SM, Konnick MM, Hashiguchi BG, Ziatdinov VR, Goddard WA, Ahlquist M, Periana RA. Using Reduced Catalysts for Oxidation Reactions: Mechanistic Studies of the “Periana-Catalytica” System for CH4 Oxidation. J Am Chem Soc 2013; 135:14644-58. [DOI: 10.1021/ja404895z] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Oleg A. Mironov
- Loker Hydrocarbon Research Institute, University of Southern California, University Park,
Los Angeles, California 90089, United States
| | - Steven M. Bischof
- The Scripps Energy & Materials Center, The Scripps Research Institute, 130 Scripps Way #3A1, Jupiter, Florida 33458, United States
| | - Michael M. Konnick
- The Scripps Energy & Materials Center, The Scripps Research Institute, 130 Scripps Way #3A1, Jupiter, Florida 33458, United States
| | - Brian G. Hashiguchi
- The Scripps Energy & Materials Center, The Scripps Research Institute, 130 Scripps Way #3A1, Jupiter, Florida 33458, United States
| | - Vadim R. Ziatdinov
- Loker Hydrocarbon Research Institute, University of Southern California, University Park,
Los Angeles, California 90089, United States
| | - William A. Goddard
- Materials and Process Simulation
Center, California Institute of Technology, Pasadena, California 91125, United States
| | - Mårten Ahlquist
- Materials and Process Simulation
Center, California Institute of Technology, Pasadena, California 91125, United States
| | - Roy A. Periana
- The Scripps Energy & Materials Center, The Scripps Research Institute, 130 Scripps Way #3A1, Jupiter, Florida 33458, United States
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161
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Knapp SMM, Sherbow TJ, Ahmed TJ, Thiel I, Zakharov LN, Juliette JJ, Tyler DR. Platinum Phosphinito Catalysts for Nitrile Hydration. J Inorg Organomet Polym Mater 2013. [DOI: 10.1007/s10904-013-9957-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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162
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Miodragović ÐU, Quentzel JA, Kurutz JW, Stern CL, Ahn RW, Kandela I, Mazar A, O'Halloran TV. Robust Structure and Reactivity of Aqueous Arsenous Acid-Platinum(II) Anticancer Complexes. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303251] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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163
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Davis JC, Bühl M, Koch KR. Probing isotope shifts in 103Rh and 195Pt NMR spectra with density functional theory. J Phys Chem A 2013; 117:8054-64. [PMID: 23862753 DOI: 10.1021/jp405453c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Zero-point vibrationally averaged (rg(0)) structures were computed at the PBE0/SDD/6-31G* level for the [Pt(35)Cln(37)Cl5-n(H2(18)O)](-) (n = 0-5), cis-Pt(35)Cln(37)Cl4-n(H2(18)O)(H2(16)O) (n = 0-4), fac-[Pt(35)Cln(37)Cl3-n(H2(18)O)(H2(16)O)2](+) (n = 0-3), [Pt(35)Cln(37)Cl5-n((16/18)OH)](2-) (n = 0-5), cis-[Pt(35)Cln(37)Cl4-n((16/18)OH)2](2-) (n = 0-4), fac-[Pt(35)Cln(37)Cl3-n((16/18)OH)3](2-) (n = 0-3), cis-[Pt(35)Cln(37)Cl2-n((16/18)OH)4](2-) (n = 0-2), [Pt(35)Cln(37)Cl1-n((16/18)OH)5](2-) (n = 0-1), [Rh(35)Cln(37)Cl5-n(H2O)](2-) (n = 0-5), cis-[Rh(35)Cln(37)Cl4-n(H2O)2](-) (n = 0-4), and fac-Rh(35)Cln(37)Cl3-n(H2O)3 (n = 0-3) isotopologues and isotopomers. Magnetic shielding constants, computed at the ZORA-SO/PW91/QZ4P/TZ2P level, were used to evaluate the corresponding (35/37)Cl isotope shifts on the (195)Pt and (103)Rh NMR spectra, which are known experimentally. While the observed effects are reproduced reasonably well computationally in terms of qualitative trends and the overall order of magnitude (ca. 1 ppm), quantitative agreement with experiment is not yet achieved. Only small changes in M-Cl and M-O bonds upon isotopic substitution, on the order of femtometers, are necessary to produce the observed isotope shifts.
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Affiliation(s)
- John C Davis
- School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9ST, United Kingdom
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164
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Zhao Y, Woods JA, Farrer NJ, Robinson KS, Pracharova J, Kasparkova J, Novakova O, Li H, Salassa L, Pizarro AM, Clarkson GJ, Song L, Brabec V, Sadler PJ. Diazido mixed-amine platinum(IV) anticancer complexes activatable by visible-light form novel DNA adducts. Chemistry 2013; 19:9578-91. [PMID: 23733242 PMCID: PMC4280898 DOI: 10.1002/chem.201300374] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Indexed: 01/09/2023]
Abstract
Platinum diam(m)ine complexes, such as cisplatin, are successful anticancer drugs, but suffer from problems of resistance and side-effects. Photoactivatable Pt(IV) prodrugs offer the potential of targeted drug release and new mechanisms of action. We report the synthesis, X-ray crystallographic and spectroscopic properties of photoactivatable diazido complexes trans,trans,trans-[Pt(N3)2(OH)2(MA)(Py)] (1; MA=methylamine, Py=pyridine) and trans,trans,trans-[Pt(N3)2(OH)2(MA)(Tz)] (2; Tz=thiazole), and interpret their photophysical properties by TD-DFT modelling. The orientation of the azido groups is highly dependent on H bonding and crystal packing, as shown by polymorphs 1p and 1q. Complexes 1 and 2 are stable in the dark towards hydrolysis and glutathione reduction, but undergo rapid photoreduction with UVA or blue light with minimal amine photodissociation. They are over an order of magnitude more potent towards HaCaT keratinocytes, A2780 ovarian, and OE19 oesophageal carcinoma cells than cisplatin and show particular potency towards cisplatin-resistant human ovarian cancer cells (A2780cis). Analysis of binding to calf-thymus (CT), plasmids, oligonucleotide DNA and individual nucleotides reveals that photoactivated 1 and 2 form both mono- and bifunctional DNA lesions, with preference for G and C, similar to transplatin, but with significantly larger unwinding angles and a higher percentage of interstrand cross-links, with evidence for DNA strand cross-linking further supported by a comet assay. DNA lesions of 1 and 2 on a 50 bp duplex were not recognised by HMGB1 protein, in contrast to cisplatin-type lesions. The photo-induced platination reactions of DNA by 1 and 2 show similarities with the products of the dark reactions of the Pt(II) compounds trans-[PtCl2(MA)(Py)] (5) and trans-[PtCl2(MA)(Tz)] (6). Following photoactivation, complex 2 reacted most rapidly with CT DNA, followed by 1, whereas the dark reactions of 5 and 6 with DNA were comparatively slow. Complexes 1 and 2 can therefore give rapid potent photocytotoxicity and novel DNA lesions in cancer cells, with no activity in the absence of irradiation.
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Affiliation(s)
- Yao Zhao
- Department of Chemistry, University of WarwickCoventry, CV4 7AL (UK)
| | - Julie A Woods
- Photobiology Unit, Department of Dermatology, University of DundeeNinewells Hospital and Medical School, Dundee, DD1 9SY (UK)
| | - Nicola J Farrer
- Department of Chemistry, University of WarwickCoventry, CV4 7AL (UK)
| | - Kim S Robinson
- Photobiology Unit, Department of Dermatology, University of DundeeNinewells Hospital and Medical School, Dundee, DD1 9SY (UK)
| | - Jitka Pracharova
- Faculty of Science, Palacky University, 17Listopadu 12, 77146 Olomouc (Czech Republic)
| | - Jana Kasparkova
- Faculty of Science, Palacky University, 17Listopadu 12, 77146 Olomouc (Czech Republic)
| | - Olga Novakova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i.Kralovopolska 135, 61265 Brno (Czech Republic)
| | - Huilin Li
- Department of Chemistry, University of WarwickCoventry, CV4 7AL (UK)
| | - Luca Salassa
- Department of Chemistry, University of WarwickCoventry, CV4 7AL (UK)
| | - Ana M Pizarro
- Department of Chemistry, University of WarwickCoventry, CV4 7AL (UK)
| | - Guy J Clarkson
- Department of Chemistry, University of WarwickCoventry, CV4 7AL (UK)
| | - Lijiang Song
- Department of Chemistry, University of WarwickCoventry, CV4 7AL (UK)
| | - Viktor Brabec
- Faculty of Science, Palacky University, 17Listopadu 12, 77146 Olomouc (Czech Republic)
| | - Peter J Sadler
- Department of Chemistry, University of WarwickCoventry, CV4 7AL (UK)
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165
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Pichler V, Göschl S, Meier SM, Roller A, Jakupec MA, Galanski M, Keppler BK. Bulky N(,N)-(di)alkylethane-1,2-diamineplatinum(II) compounds as precursors for generating unsymmetrically substituted platinum(IV) complexes. Inorg Chem 2013; 52:8151-62. [PMID: 23790208 DOI: 10.1021/ic400816g] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Investigations of the influence of bulky groups in the equatorial ligand sphere of platinum(IV) compounds on the complexes' stability and reaction pattern were performed. Four dihydroxidoplatinum(IV) complexes were reacted with anhydrides, cinnamoyl chloride, and n-propyl isocyanate and yielded the symmetric dicarboxylated products or, if steric hindrance was observed, unsymmetrically substituted monocarboxylated analogues. With the aim of raising the steric demand, the following ligands were chosen: N-cyclohexylethane-1,2-diamine, N,N-dimethylethane-1,2-diamine, N,N-diethylethane-1,2-diamine, and N,N-diisopropylethane-1,2-diamine. All of the novel complexes were characterized by electrospray ionization mass spectrometry (ESI-MS), one- and two-dimensional NMR spectroscopy, elemental analysis, and reversed-phase HPLC; complexes B3, C3, C6, and D4 were also analyzed by X-ray diffraction. Additionally, the cytotoxicities of 10 compounds toward the cisplatin-sensitive cell line CH1 and the intrinsically cisplatin-resistant cell lines A549 and SW480 were investigated, and IC50 values down to the nanomolar range were found. To aid in the interpretation of structure-activity relationships, log k(w) values as a measure for the lipophilicity were determined for all of the new complexes, and the rates of reduction of C1, C3, and C4 relative to satraplatin were determined by means of NMR spectroscopy and ESI-MS.
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Affiliation(s)
- Verena Pichler
- Institute of Inorganic Chemistry, University of Vienna, Währinger Straße 42, A-1090 Vienna, Austria
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166
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Lüning A, Schur J, Hamel L, Ott I, Klein A. Strong Cytotoxicity of Organometallic Platinum Complexes with Alkynyl Ligands. Organometallics 2013. [DOI: 10.1021/om400293u] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Anna Lüning
- Department
für Chemie, Institut für Anorganische
Chemie, Universität zu Köln, Greinstraße 6, D-50939 Köln, Germany
| | - Julia Schur
- Institute
of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Beethovenstraße
55, D-38106 Braunschweig, Germany
| | - Laura Hamel
- Institute
of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Beethovenstraße
55, D-38106 Braunschweig, Germany
| | - Ingo Ott
- Institute
of Medicinal and Pharmaceutical Chemistry, Technische Universität Braunschweig, Beethovenstraße
55, D-38106 Braunschweig, Germany
| | - Axel Klein
- Department
für Chemie, Institut für Anorganische
Chemie, Universität zu Köln, Greinstraße 6, D-50939 Köln, Germany
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167
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Pinter B, Urankar D, Pevec A, De Proft F, Košmrlj J. Platinum-Mediated Dinitrogen Liberation from 2-Picolyl Azide through a Putative Pt═N Double Bond Containing Intermediate. Inorg Chem 2013; 52:4528-33. [DOI: 10.1021/ic302834e] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Balazs Pinter
- Eenheid Algemene Chemie (ALGC), Member
of the QCMM VUB-UGent Alliance Research Group, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels,
Belgium
| | - Damijana Urankar
- Faculty of Chemistry
and Chemical Technology, University of Ljubljana, Aškerčeva 5, Ljubljana, Slovenia
| | - Andrej Pevec
- Faculty of Chemistry
and Chemical Technology, University of Ljubljana, Aškerčeva 5, Ljubljana, Slovenia
| | - Frank De Proft
- Eenheid Algemene Chemie (ALGC), Member
of the QCMM VUB-UGent Alliance Research Group, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels,
Belgium
| | - Janez Košmrlj
- Faculty of Chemistry
and Chemical Technology, University of Ljubljana, Aškerčeva 5, Ljubljana, Slovenia
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168
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Buchner MR, Bechlars B, Wahl B, Ruhland K. Influence of Electronically and Sterically Tunable Cinnamate Ligands on the Spectroscopic Properties and Reactivity of Bis(triphenylphosphine)platinum(0) Olefin Complexes. Organometallics 2013. [DOI: 10.1021/om301021j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Magnus R. Buchner
- WACKER-Institut für Siliciumchemie,
Lehrstuhl für Anorganische Chemie, Technische Universität München, Lichtenbergstraße
4, 85747 Garching bei München, Germany
| | - Bettina Bechlars
- Lehrstuhl
für Anorganische Chemie, Technische Universität München, Lichtenbergstraße
4, 85747 Garching bei München, Germany
| | - Bernhard Wahl
- Lehrstuhl
für Anorganische Chemie mit Schwerpunkt Neue Materialien, Technische Universität München, Lichtenbergstraße 4, 85747 Garching bei München, Germany
| | - Klaus Ruhland
- Lehrstuhl für Chemische Physik und Materialwissenschaften, Universität Augsburg, Universitätsstraße
1, 86135 Augsburg, Germany
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169
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Elumalai P, Thirupathi N, Nethaji M. Dual Role of Acetate as a Nucleophile and as an Internal Base in Cycloplatination Reaction of sym-N,N′,N″-Triarylguanidines. Inorg Chem 2013; 52:1883-94. [DOI: 10.1021/ic302058u] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Palani Elumalai
- Department of Chemistry, University of Delhi, Delhi 110 007, India
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170
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Roberto Pioquinto-Mendoza J, Martínez-Otero D, Andrade-López N, Alvarado-Rodríguez JG, Salazar-Pereda V, Sánchez-Cabrera G, Zuno-Cruz FJ. cis-Dichloro complexes of NiII, PdII, and PtII derived from 2-pyridylmethyl-N-substituted imines. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.11.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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171
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Berenguer JR, Fernández J, Lalinde E, Sánchez S. New Trans-Configured Acetylide–Cyanide Platinum(II) Anions: Spectroscopic and Optical Studies. Organometallics 2013. [DOI: 10.1021/om301134k] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Jesús R. Berenguer
- Departamento de
Quı́mica−Centro de Investigación en Sı́ntesis
Quı́mica, Universidad de La Rioja, 26006 Logroño, Spain
| | - Julio Fernández
- Departamento de
Quı́mica−Centro de Investigación en Sı́ntesis
Quı́mica, Universidad de La Rioja, 26006 Logroño, Spain
| | - Elena Lalinde
- Departamento de
Quı́mica−Centro de Investigación en Sı́ntesis
Quı́mica, Universidad de La Rioja, 26006 Logroño, Spain
| | - Sergio Sánchez
- Departamento de
Quı́mica−Centro de Investigación en Sı́ntesis
Quı́mica, Universidad de La Rioja, 26006 Logroño, Spain
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172
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Forniés J, Fortuño C, Ibáñez S, Martín A, Mastrorilli P, Gallo V, Tsipis A. Synthesis and Reactivity of the Unsaturated Trinuclear Phosphanido Complex [(C6F5)2Pt(μ-PPh2)2Pt(μ-PPh2)2Pt(PPh3)]. Inorg Chem 2013; 52:1942-53. [DOI: 10.1021/ic3021639] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Juan Forniés
- Departamento de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea, Universidad de Zaragoza, CSIC, 50009 Zaragoza, Spain
| | - Consuelo Fortuño
- Departamento de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea, Universidad de Zaragoza, CSIC, 50009 Zaragoza, Spain
| | - Susana Ibáñez
- Departamento de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea, Universidad de Zaragoza, CSIC, 50009 Zaragoza, Spain
| | - Antonio Martín
- Departamento de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea, Universidad de Zaragoza, CSIC, 50009 Zaragoza, Spain
| | - Piero Mastrorilli
- Dipartimento di Ingegneria
Civile, Ambientale, del Territorio, Edile e di Chimica (DICATECh), Politecnico di Bari, via
Orabona 4, I-70125 Bari, Italy
| | - Vito Gallo
- Dipartimento di Ingegneria
Civile, Ambientale, del Territorio, Edile e di Chimica (DICATECh), Politecnico di Bari, via
Orabona 4, I-70125 Bari, Italy
| | - Athanassios Tsipis
- Laboratory of Inorganic and General Chemistry, Department
of Chemistry, University of Ioannina, 45110 Ioannina, Greece
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173
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Anselmi M, Bonuccelli V, Funaioli T, Leoni P, Marchetti F, Marchetti L, Mohapatra SK, Pasquali M. Synthesis and electrochemical characterization of hexanuclear platinum bis-pseudohalides. Dalton Trans 2013; 42:10855-66. [DOI: 10.1039/c3dt50714a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Martina Anselmi
- Dipartimento di Chimica e Chimica Industriale, Università di Pisa, Via Risorgimento 35, I-56126 Pisa, Italy
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174
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Pichler V, Heffeter P, Valiahdi SM, Kowol CR, Egger A, Berger W, Jakupec MA, Galanski M, Keppler BK. Unsymmetric mono- and dinuclear platinum(IV) complexes featuring an ethylene glycol moiety: synthesis, characterization, and biological activity. J Med Chem 2012. [PMID: 23194425 DOI: 10.1021/jm301645g] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Eight novel mononuclear and two dinuclear platinum(IV) complexes were synthesized and characterized by elemental analysis, one- and two-dimensional NMR spectroscopy, mass spectrometry, and reversed-phase HPLC (log k(w)) and in one case by X-ray diffraction. Cytotoxicity of the compounds was studied in three human cancer cell lines (CH1, SW480, and A549) by means of the MTT assay, featuring IC(50) values to the low micromolar range. Furthermore a selected set of compounds was investigated in additional cancer cell lines (P31 and P31/cis, A2780 and A2780/cis, SW1573, 2R120, and 2R160) with regard to their resistance patterns, offering a distinctly different scheme compared to cisplatin. To gain further insights into the mode of action, drug uptake, DNA synthesis inhibition, cell cycle effects, and induction of apoptosis were determined for two characteristic substances.
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Affiliation(s)
- Verena Pichler
- Institute of Inorganic Chemistry, University of Vienna, Waehringer Strasse 42, A-1090 Vienna, Austria
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175
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176
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Wexselblatt E, Gibson D. What do we know about the reduction of Pt(IV) pro-drugs? J Inorg Biochem 2012; 117:220-9. [DOI: 10.1016/j.jinorgbio.2012.06.013] [Citation(s) in RCA: 236] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2012] [Revised: 06/23/2012] [Accepted: 06/25/2012] [Indexed: 10/28/2022]
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177
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Murray P, Gerber WJ, Koch KR. (35/37)Cl and (16/18)O isotope resolved 195Pt NMR: unique spectroscopic 'fingerprints' for unambiguous speciation of [PtCl(n)(H2O)(6-n)](4-n) (n = 2-5) complexes in an acidic aqueous solution. Dalton Trans 2012; 41:10533-42. [PMID: 22858911 DOI: 10.1039/c2dt31201h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
At high magnetic fields the 128.8 MHz (195)Pt NMR of all the species in the series [PtCl(n)(H(2)O)(6-n)](4-n) (n = 2-6) display unique (35/37)Cl isotope effects resulting in a unique 'fine-structure' of each individual resonance, which constitutes an unambiguous spectroscopic 'fingerprint' characteristic of the structure of the octahedral platinum(IV) complex, provided (195)Pt NMR are recorded at optimum magnetic field homogeneity and carefully controlled temperature (293 ± 0.1 K). The detailed (195)Pt resonance fine-structure observed experimentally can readily be accounted for by an isotopologue and isotopomer model for each complex, showing particularly noticeable differences between stereoisomer pairs such as the cis/trans- and fac/mer-complexes. Moreover partial isotopic (18)O enrichment of the coordinated water molecules in the series [Pt(35/37)Cl(n)(H(2)(16/18)O)(6-n)](n-2) (n = 2-6) confirms this model. This technique can thus be considered a novel, direct spectroscopic method of chemical speciation of appropriate platinum(IV) complexes in solution without reference to accurate chemical shifts of authentic members of such a series. These effects are interpreted qualitatively in terms of the high sensitivity of (195)Pt NMR shielding to very small and subtle Pt-(35/37)Cl and Pt-(16/18)OH(2) bond displacements. Preliminary work shows this also applied to the corresponding bromido-complexes.
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Affiliation(s)
- Pieter Murray
- Platinum Metals Chemistry Research Group, Department of Chemistry and Polymer Science, University of Stellenbosch, P Bag X1, Matieland, 7602, South Africa
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178
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Binauld S, Scarano W, Stenzel MH. pH-Triggered Release of Platinum Drugs Conjugated to Micelles via an Acid-Cleavable Linker. Macromolecules 2012. [DOI: 10.1021/ma3012812] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Sandra Binauld
- Centre for Advanced Macromolecular
Design (CAMD), University of New South Wales, Sydney, NSW 2052, Australia
| | - Wei Scarano
- Centre for Advanced Macromolecular
Design (CAMD), University of New South Wales, Sydney, NSW 2052, Australia
| | - Martina H. Stenzel
- Centre for Advanced Macromolecular
Design (CAMD), University of New South Wales, Sydney, NSW 2052, Australia
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179
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Chin CF, Tian Q, Setyawati MI, Fang W, Tan ESQ, Leong DT, Ang WH. Tuning the Activity of Platinum(IV) Anticancer Complexes through Asymmetric Acylation. J Med Chem 2012; 55:7571-82. [DOI: 10.1021/jm300580y] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Chee Fei Chin
- Department
of Chemistry, National
University of Singapore, 3 Science Drive 3, 117543 Singapore
| | - Quan Tian
- Department
of Chemistry, National
University of Singapore, 3 Science Drive 3, 117543 Singapore
| | - Magdiel Inggrid Setyawati
- Department of Chemical and Biomolecular
Engineering, National University of Singapore, 4 Engineering Drive
4, 117576 Singapore
| | - Wanru Fang
- Department of Chemical and Biomolecular
Engineering, National University of Singapore, 4 Engineering Drive
4, 117576 Singapore
| | - Emelyn Sue Qing Tan
- Department
of Chemistry, National
University of Singapore, 3 Science Drive 3, 117543 Singapore
| | - David Tai Leong
- Department of Chemical and Biomolecular
Engineering, National University of Singapore, 4 Engineering Drive
4, 117576 Singapore
| | - Wee Han Ang
- Department
of Chemistry, National
University of Singapore, 3 Science Drive 3, 117543 Singapore
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180
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Dimmer JA, Hornung M, Eichele K, Wesemann L. Selenium adducts of germa- and stanna-closo-dodecaborate: coordination at platinum, structural studies and NMR spectroscopy. Dalton Trans 2012; 41:8989-96. [PMID: 22717985 DOI: 10.1039/c2dt30478c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The selenium adducts of germa- and stanna-closo-dodecaborate can coordinate at platinum via the selenium atom and result in the products [Pt(dppp)(Se-TB(11)H(11))(2)](2-) (T = Ge, Sn) (dppp = 1,3-bis(diphenylphosphino)propane). The monomeric tin compound [Pt(dppp)(Se-SnB(11)H(11))(2)](2-) is converted to a dimeric complex [Pt(2)(dppp)(2)(μ(2),μ'(2)-η(2)-Se(2)SnB(11)H(11))]. The new compounds were characterized by NMR spectroscopy in solution ((1)H, (11)B, (13)C, (31)P, (77)Se, (119)Sn, (195)Pt), elemental analysis and single crystal X-ray diffraction.
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Affiliation(s)
- Jörg-Alexander Dimmer
- Institut für Anorganische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076, Tübingen, Germany
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181
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Sutter K, Autschbach J. Computational study and molecular orbital analysis of NMR shielding, spin-spin coupling, and electric field gradients of azido platinum complexes. J Am Chem Soc 2012; 134:13374-85. [PMID: 22794134 DOI: 10.1021/ja3040762] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
(195)Pt, (14)N, and (15)N NMR data for five azido (N(3)(-)) complexes are studied using relativistic density functional theory (DFT). Good agreement with experiment is obtained for Pt and N chemical shifts as well as Pt-N J-coupling constants. Calculated (14)N electric field gradients (EFGs) reflect experimentally observed trends for the line broadening of azido (14)N NMR signals. A localized molecular orbital analysis of the nitrogen EFGs and chemical shifts is performed to explain some interesting trends seen experimentally and in the first-principles calculations: (i) (14)N NMR signals for the Pt-coordinating (N(α)) nuclei in the azido ligands are much broader than for the central (N(β)) or terminal (N(γ)) atoms. The N(β) signals are particularly narrow; (ii) compared to N(γ), the N(α) nuclei are particularly strongly shielded; (iii) N(β) nuclei have much larger chemical shifts than N(α) and N(γ) ; and (iv) The Pt-N(α) J-coupling constants are small in magnitude when considering the formal sp hybridization of N(α). It is found that for N(α) a significant shielding reduction due to formation of the dative N(α)-Pt bond is counterbalanced by an increased shielding from spin-orbit (SO) coupling originating at Pt. Upon coordination, the strongly delocalized π system of free azide localizes somewhat on N(β) and N(γ). This effect, along with rehybridization at N(α) upon bond formation with Pt, is shown to cause a deshielding of N(γ) relative to N(α) and a strong increase of the EFG at N(α). The large 2p character of the azide σ bonds is responsible for the particularly high N(β) chemical shifts. The nitrogen s-character of the Pt-N(α) bond is low, which is the reason for the small J-coupling. Similar bonding situations are likely to be found in azide complexes with other transition metals.
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Affiliation(s)
- Kiplangat Sutter
- Department of Chemistry, State University of New York at Buffalo, Buffalo, New York 14260-3000, USA
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182
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Tai HC, Zhao Y, Farrer NJ, Anastasi AE, Clarkson G, Sadler PJ, Deeth RJ. A computational approach to tuning the photochemistry of platinum(IV) anticancer agents. Chemistry 2012; 18:10630-42. [PMID: 22807241 DOI: 10.1002/chem.201200782] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2012] [Indexed: 11/11/2022]
Abstract
Diazido Pt(IV) complexes are inert stable prodrugs that can be photoactivated to produce Pt(II) species with promising anticancer activity. Our studies of the photochemistry of Pt(IV) complexes, [Pt(X)(2) (Y)(2) (Z)(2) ](0/-1) (X=N-ligands (NH(3) , pyridine, etc.)/S(CH(3) )(2) /H(-) , Y=(pseudo)halogen (N(3) (-) , I(-) ), Z=OR(-) , R=H, Ac) by time-dependent density functional theory (TDDFT) show close agreement with spectroscopic data. Broad exploration of cis/trans geometries, trans influences, the nature of the OR(-) and (pseudo)halogen ligands, electron-withdrawing/donating/delocalising substituents on the N-ligands, and intramolecular H bonds shows that: 1) the design of platinum(IV) complexes with intense bands shifted towards longer wavelengths (from 289 to ∼330 nm) can be achieved by introducing intramolecular H bonds involving the OH ligands and 2-hydroxyquinoline or by iodido ligands; 2) mesomeric electron-withdrawing substituents on pyridine result in low-energy absorption with significant intensity in the visible region; and 3) the distinct makeup of the molecular orbitals involved in the electronic transitions for cis/trans-{Pt(N(3) )(2) } isomers results in different photoproducts. In general, the comparison of the optimised geometries shows that Pt(IV) complexes with longer PtL bonds are more likely to undergo photoreduction with longer-wavelength light. The novel complex trans,trans,trans-[Pt(N(3) )(2) (OH)(2) (NH(3) )(4-nitropyridine)] with predicted absorption in the visible region has been synthesised. The experimental UV/Vis spectrum in aqueous solution correlates well with the intense band in the computed spectrum, whereas the overlay in the low-energy region can be improved by a solvent model. This combined computational and experimental study shows that TDDFT can be used to tune the coordination environment for optimising photoactive Pt(IV) compounds as anticancer agents.
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Affiliation(s)
- Hui-Chung Tai
- Department of Chemistry, University of Warwick, Gibbet Hill Road, Coventry, UK
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183
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Takagi N, Sakaki S. A Theoretical Study of an Unusual Y-Shaped Three-Coordinate Pt Complex: Pt(0) σ-Disilane Complex or Pt(II) Disilyl Complex? J Am Chem Soc 2012; 134:11749-59. [DOI: 10.1021/ja304110h] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Nozomi Takagi
- Fukui Institute for Fundamental Chemistry, Kyoto University, Takano-Nishihiraki-cho 43-4, Sakyo-ku,
Kyoto 606-8103, Japan
| | - Shigeyoshi Sakaki
- Fukui Institute for Fundamental Chemistry, Kyoto University, Takano-Nishihiraki-cho 43-4, Sakyo-ku,
Kyoto 606-8103, Japan
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184
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Wilson JJ, Lippard SJ. In vitro anticancer activity of cis-diammineplatinum(II) complexes with β-diketonate leaving group ligands. J Med Chem 2012; 55:5326-36. [PMID: 22606945 DOI: 10.1021/jm3002857] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Five cationic platinum(II) complexes of general formula, [Pt(NH(3))(2)(β-diketonate)]X are reported, where X is a noncoordinating anion and β-diketonate = acetylacetonate (acac), 1,1,1,-trifluoroacetylacetonate (tfac), benzoylacetonate (bzac), 4,4,4-trifluorobenzoylacetonate (tfbz), or dibenzoylmethide (dbm), corresponding, respectively, to complexes 1-5. The log P values and the stabilities of 1-5 in aqueous solution were evaluated. The phenyl ring substituents of 3-5 increase the lipophilicity of the resulting complexes, whereas the trifluoromethyl groups of 2 and 4 decrease the stability of the complexes in aqueous solution. The uptake of 1-5 in HeLa cells increases as the lipophilicity of the investigated complex increases. Cancer cell cytotoxicity studies indicate that 1 and 3 are the least active complexes whereas 2, 4, and 5 are comparable in activity to cisplatin.
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Affiliation(s)
- Justin J Wilson
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
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185
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Novel methylene modified cyclohexyl ethylenediamine-N,N′-diacetate ligands and their platinum(IV) complexes. Influence on biological activity. J Inorg Biochem 2012; 109:40-8. [DOI: 10.1016/j.jinorgbio.2012.01.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2011] [Revised: 12/29/2011] [Accepted: 01/20/2012] [Indexed: 02/07/2023]
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186
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Davis JC, Bühl M, Koch KR. On the Origin of 35/37Cl Isotope Effects on 195Pt NMR Chemical Shifts. A Density Functional Study. J Chem Theory Comput 2012; 8:1344-50. [DOI: 10.1021/ct300105q] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- John C. Davis
- School of Chemistry, University of St. Andrews, North Haugh, St. Andrews,
Fife KY16 9ST, U.K
- Department
of Chemistry and
Polymer Science, University of Stellenbosch, P Bag X1, Matieland, 7602, South Africa
| | - Michael Bühl
- School of Chemistry, University of St. Andrews, North Haugh, St. Andrews,
Fife KY16 9ST, U.K
| | - Klaus R. Koch
- Department
of Chemistry and
Polymer Science, University of Stellenbosch, P Bag X1, Matieland, 7602, South Africa
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187
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Shi Y, Liu SA, Kerwood DJ, Goodisman J, Dabrowiak JC. Pt(IV) complexes as prodrugs for cisplatin. J Inorg Biochem 2012; 107:6-14. [DOI: 10.1016/j.jinorgbio.2011.10.012] [Citation(s) in RCA: 137] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2011] [Revised: 10/22/2011] [Accepted: 10/27/2011] [Indexed: 01/08/2023]
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188
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Vícha J, Demo G, Marek R. Platinum-Modified Adenines: Unprecedented Protonation Behavior Revealed by NMR Spectroscopy and Relativistic Density-Functional Theory Calculations. Inorg Chem 2012; 51:1371-9. [DOI: 10.1021/ic201595e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Jan Vícha
- National Center for Biomolecular Research, Faculty
of Science and Central European Institute of Technology-CEITEC, Masaryk University, Kamenice 5/A4, CZ-62500 Brno, Czech
Republic
| | - Gabriel Demo
- National Center for Biomolecular Research, Faculty
of Science and Central European Institute of Technology-CEITEC, Masaryk University, Kamenice 5/A4, CZ-62500 Brno, Czech
Republic
| | - Radek Marek
- National Center for Biomolecular Research, Faculty
of Science and Central European Institute of Technology-CEITEC, Masaryk University, Kamenice 5/A4, CZ-62500 Brno, Czech
Republic
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189
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Wilson JJ, Lippard SJ. Modulation of Ligand Fluorescence by the Pt(II)/Pt(IV) Redox Couple. Inorganica Chim Acta 2012; 389:77-84. [PMID: 22837584 DOI: 10.1016/j.ica.2011.12.034] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The dangling carboxylic acid moiety of the known platinum(II) complex, [Pt(edma)Cl(2)] (edma = ethylenediaminemonoacetic acid), was functionalized via amide coupling chemistry with benzyl amine and dansyl ethylenediamine to afford the derivatives [Pt(edBz)Cl(2)] (1) and [Pt(edDs)Cl(2)] (2). Subsequent oxidation of these platinum(II) complexes with iodobenzene dichloride in DMF yielded the respective platinum(IV) analogues, [Pt(edBz)Cl(4)] (3) and [Pt(edDs)Cl(4)] (4). All four platinum complexes were characterized by multinuclear NMR spectroscopy, IR spectroscopy, electrospray ionization mass spectrometry, and elemental analysis. In addition, compounds 1 and 3 were structurally characterized by X-ray crystallography. The photophysical properties of the compounds bearing the fluorescent dansyl moiety, 2 and 4, were evaluated. The emission quantum yields of 2 and 4 in DMF are 27% and 1.6%, respectively. This large difference in emission efficiency indicates that the platinum(IV) center in 4 is more effective at quenching the dansyl-based fluorescence than the platinum(II) center in 2. Time-dependent density functional theory calculations indicate that 4 has several low-lying singlet excited states that energetically lie below the primary radiation-accessible excited state of the dansyl fluorophore. These low-energy excited states may offer non-radiative decay pathways that lower the overall emission quantum yield. Treatment of 4 with biologically relevant reducing agents in pH 7.4 phosphate-buffered saline induces a 6.3-fold increase in emission intensity. These results demonstrate that 4 and future derivatives thereof may be useful for imaging the reduction of platinum(IV) complexes in living systems, chemistry of importance for future platinum-based anticancer drug strategies.
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Affiliation(s)
- Justin J Wilson
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
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190
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Brown SD, Trotter KD, Sutcliffe OB, Plumb JA, Waddell B, Briggs NEB, Wheate NJ. Combining aspects of the platinum anticancer drugs picoplatin and BBR3464 to synthesize a new family of sterically hindered dinuclear complexes; their synthesis, binding kinetics and cytotoxicity. Dalton Trans 2012; 41:11330-9. [DOI: 10.1039/c2dt31313h] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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191
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192
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Marshall P, Jenkins RL, Clegg W, Harrington RW, Callear SK, Coles SJ, Fallis IA, Dervisi A. Chiral Ag(i) and Pt(ii) complexes of ditopic NHC ligands: synthesis, structural and spectroscopic properties. Dalton Trans 2012; 41:12839-46. [DOI: 10.1039/c2dt31740k] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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193
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Nickl C, Eichele K, Wesemann L. 1,2-Distanna-closo-dodecaborate—a rare example of a 1,2-distannylene ligand in transition metal chemistry. Dalton Trans 2012; 41:243-50. [DOI: 10.1039/c1dt11247c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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194
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López C, González A, Bosque R, Basu PK, Font-Bardía M, Calvet T. Platinum(ii) and palladium(ii) complexes derived from 1-ferrocenylmethyl-3,5-diphenylpyrazole. Coordination, cyclometallation or transannulation? RSC Adv 2012. [DOI: 10.1039/c1ra01080h] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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195
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Cautivo T, Klahn H, Godoy F, López C, Font-Bardía M, Calvet T, Gutierrez-Puebla E, Monge A. A New Cyclometalation Motif: Synthesis, Characterization, Structures, and Reactivity of Pallada- and Platinacycles with a Bidentate {C(sp2,cyrhetrene),N}− Ligand. Organometallics 2011. [DOI: 10.1021/om200310r] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Teresa Cautivo
- Instituto de Química, Pontificia, Universidad Católica de Valparaíso, Casilla 4059, Valparaíso, Chile
| | - Hugo Klahn
- Instituto de Química, Pontificia, Universidad Católica de Valparaíso, Casilla 4059, Valparaíso, Chile
| | - Fernando Godoy
- Departamento de Química de los Materiales, Facultad de Química y Biología, Universidad de Santiago de Chile, Casilla 40, Santiago, Chile
| | - Concepción López
- Departament de Quimica Inorgànica, Facultat de Química, Universitat de Barcelona, Martí Franquès 1-11, 08028 Barcelona, Spain
| | - Mercè Font-Bardía
- Unitat de Difracció de Raigs-X, Centre Científic i Tecnològic de la Universitat de Barcelona, Universitat de Barcelona, Solé i Sabaris 1-3, 08028 Barcelona, Spain
- Departament de Crystal·lografia, Mineralogia i Dipòsits Minerals, Facultat de Geologia, Universitat de Barcelona, Martí i Franquès s/n, 08028 Barcelona, Spain
| | - Teresa Calvet
- Departament de Crystal·lografia, Mineralogia i Dipòsits Minerals, Facultat de Geologia, Universitat de Barcelona, Martí i Franquès s/n, 08028 Barcelona, Spain
| | - Enrique Gutierrez-Puebla
- Instituto de Ciencias de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas, Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
| | - Angeles Monge
- Instituto de Ciencias de Materiales de Madrid, Consejo Superior de Investigaciones Cientificas, Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain
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196
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Farrer NJ, Gierth P, Sadler PJ. Probing platinum azido complexes by 14N and 15N NMR spectroscopy. Chemistry 2011; 17:12059-66. [PMID: 21922574 DOI: 10.1002/chem.201101409] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2011] [Indexed: 01/12/2023]
Abstract
Metal azido complexes are of general interest due to their high energetic properties, and platinum azido complexes in particular because of their potential as photoactivatable anticancer prodrugs. However, azido ligands are difficult to probe by NMR spectroscopy due to the quadrupolar nature of (14)N and the lack of scalar (1)H coupling to enhance the sensitivity of the less abundant (15)N by using polarisation transfer. In this work, we report (14)N and (15)N NMR spectroscopic studies of cis,trans,cis-[Pt(N(3))(2)(OH)(2)(NH(3))] (1) and trans,trans,trans-[Pt(N(3))(2)(OH)(2)(X)(Y)], where X=Y=NH(3) (2); X=NH(3), Y=py (3) (py=pyridine); X=Y=py (4); and selected Pt(II) precursors. These studies provide the first (15)N NMR data for azido groups in coordination complexes. We discuss one- and three-bond J((15)N,(195)Pt) couplings for azido and am(m)ine ligands. The (14)N(α) (coordinated azido nitrogen) signal in the Pt(IV) azido complexes is extremely broad (W(1/2)≈2124 Hz for 4) in comparison to other metal azido complexes, attributable to a highly asymmetrical electric field gradient at the (14)N(α) atom. Through the use of anti-ringing pulse sequences, the (14)N NMR spectra, which show resolution of the broad (14)N(α) peak, were obtained rapidly (e.g., 1.5 h for 10 mM 4). The linewidths of the (14)N(α) signals correlate with the viscosity of the solvent. For (15) N-enriched samples, it is possible to detect azido (15)N resonances directly, which will allow photoreactions to be followed by 1D (15)N NMR spectroscopy. The T(1) relaxation times for 3 and 4 were in the range 5.7-120 s for (15)N, and 0.9-11.3 ms for (14)N. Analysis of the (1)J((15)N,(195)Pt) coupling constants suggests that an azido ligand has a moderately strong trans influence in octahedral Pt(IV) complexes, within the series 2-pic<py<NH(3)<Cl(-)<N(3)(-)<NO(2)(-)<SCN(-) (2-pic=2-methylpyridine). In addition, an axial Cl(-) appears to weaken an equatorial Pt(IV)-NH(3) bond to a greater extent than an axial OH(-) ligand.
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Affiliation(s)
- Nicola J Farrer
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK.
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197
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Pichler V, Valiahdi SM, Jakupec MA, Arion VB, Galanski M, Keppler BK. Mono-carboxylated diaminedichloridoplatinum(IV) complexes--selective synthesis, characterization, and cytotoxicity. Dalton Trans 2011; 40:8187-92. [PMID: 21743934 DOI: 10.1039/c1dt10301f] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(OC-6-43)-Dichlorido(N,N-dimethyl-ethane-1,2-diamine)dihydroxidoplatinum(IV) could selectively be mono-carboxylated with succinic anhydride based on the steric hindrance caused by the two methyl groups of the equatorial ligand. Subsequent esterification of the uncoordinated carboxylic acid with alcohols of different lengths (methanol, butanol, hexanol and octanol) afforded the corresponding esters. The synthesized complexes were characterized in detail by elemental analysis, ESI-MS, multinuclear ((1)H, (13)C, (15)N and (195)Pt) NMR spectroscopy and in two cases by X-ray crystallography. Cytotoxicity of novel platinum(IV) compounds was investigated in four human cancer cell lines (CH1, A549, SW480 and SK-OV-3). Remarkably, the most lipophilic complexes showed IC(50) values down to the low micromolar or even nanomolar range.
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Affiliation(s)
- Verena Pichler
- University of Vienna, Institute of Inorganic Chemistry, Waehringer Strasse 42, A-1090, Vienna, Austria
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198
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Le Guennic B, Autschbach J. [Pt@Pb12]2– — A challenging system for relativistic density functional theory calculations of 195Pt and 207Pb NMR parameters. CAN J CHEM 2011. [DOI: 10.1139/v11-054] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We report computations of NMR chemical shifts and indirect spin-spin coupling constants (J couplings) for the [Pt@Pb12]2– “superatom”. The system is strongly influenced by relativistic effects. The Pt–Pb coupling constant is predicted to be negative, with its magnitude being in reasonable agreement with experiment. Pt and Pb chemical shifts also agree reasonably well with experiment. The Pb shielding tensor is strongly anisotropic, with a large deshielding principal component dominated by magnetic coupling between frontier orbitals of the cluster that resemble atomic g orbitals. The NMR parameters are sensitive to approximations made in the computations and require the inclusion of spin-orbit coupling in the theoretical model to achieve reliable results. Computing the NMR parameters of the compact [Pt@Pb12]2– system with its many electrons proves to be a challenging test case for relativistic density functional methods.
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Affiliation(s)
- Boris Le Guennic
- Université de Lyon, Laboratoire de Chimie, Ecole Normale Supérieure de Lyon, CNRS, 46 allée d’Italie, F-69364 Lyon, France
| | - Jochen Autschbach
- Department of Chemistry, University at Buffalo, State University of New York, Buffalo, NY 14260-3000, USA
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199
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López C, Moya C, Basu PK, González A, Solans X, Font-Bardía M, Calvet T, Lalinde E, Teresa Moreno M. Synthesis, crystal structures and properties of cis- and trans-isomers of [Pt{C6H4-4R1-1-[C8H4N-3′-NOMe]}Cl2(dmso)] (R1=H or Cl). J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2011.05.030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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200
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Durben S, Baumgartner T. Azadibenzophospholes: Functional Building Blocks with Pronounced Electron-Acceptor Character. Inorg Chem 2011; 50:6823-36. [DOI: 10.1021/ic200951x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stefan Durben
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Thomas Baumgartner
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
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