1
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Taylor NS, Gordinier MT, Suhagia T, Pinto DD, Cherry DD, Verry DS, Baker LN, DeYonker NJ, Young KJ, Brewster TP. Donor Ability of Bisphosphinemonoxide Ligands Relevant to Late-Metal Olefin Polymerization Catalysis. Inorg Chem 2024; 63:2888-2898. [PMID: 38295440 DOI: 10.1021/acs.inorgchem.3c02869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024]
Abstract
Late-transition-metal catalysts for polymerization of olefins have drawn a significant amount of attention owing to their ability to tolerate and incorporate polar comonomers. However, a systematic way to experimentally quantify the electronic properties of the ligands used in these systems has not been developed. Quantified ligand parameters will allow for the rational design of tailored polymerization catalysts, which would target specific polymer properties. We report a series of platinum complexes bearing bisphosphinemonoxide ligands, which resemble those used in the polymerization catalysts of Nozaki and Chen. Their electronic properties are investigated experimentally, and trends are rationalized by using computed spectral properties. Benchmarking computational data with known experimental parameters further enhances the utility of both methods for determining optimal ligands for catalytic application.
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Affiliation(s)
- Natalie S Taylor
- Department of Chemistry, The University of Memphis, Memphis, Tennessee 38152, United States
| | - Maxwell T Gordinier
- Department of Chemistry, Centre College, Danville, Kentucky 40422, United States
| | - Tejaskumar Suhagia
- Department of Chemistry, The University of Memphis, Memphis, Tennessee 38152, United States
| | - Danna D Pinto
- Department of Chemistry, The University of Memphis, Memphis, Tennessee 38152, United States
| | - Demetrius D Cherry
- Department of Chemistry, Centre College, Danville, Kentucky 40422, United States
| | - Dominic S Verry
- Department of Chemistry, Centre College, Danville, Kentucky 40422, United States
| | - Lindsey N Baker
- Department of Chemistry, The University of Memphis, Memphis, Tennessee 38152, United States
| | - Nathan J DeYonker
- Department of Chemistry, The University of Memphis, Memphis, Tennessee 38152, United States
| | - Karin J Young
- Department of Chemistry, Centre College, Danville, Kentucky 40422, United States
| | - Timothy P Brewster
- Department of Chemistry, The University of Memphis, Memphis, Tennessee 38152, United States
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2
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Gabano E, Gariboldi MB, Marras E, Barbato F, Ravera M. Platinum(IV) combo prodrugs containing cyclohexane-1 R,2 R-diamine, valproic acid, and perillic acid as a multiaction chemotherapeutic platform for colon cancer. Dalton Trans 2023; 52:11349-11360. [PMID: 37530512 DOI: 10.1039/d3dt01876h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
The complex [PtCl2(cyclohexane-1R,2R-diamine)] has been combined in a Pt(IV) molecule with two different bioactive molecules (i.e., the histone deacetylase inhibitor 2-propylpentanoic acid or valproic acid, VPA, and the potential antimetastatic molecule 4-isopropenylcyclohexene-1-carboxylic acid or perillic acid, PA) in order to obtain a set of multiaction or multitarget antiproliferative agents. In addition to traditional thermal synthetic procedures, microwave-assisted heating was used to speed up their preparation. All Pt(IV) complexes showed antiproliferative activity on four human colon cancer cell lines (namely HCT116, HCT8, RKO and HT29) in the nanomolar range, considerably better than those of [PtCl2(cyclohexane-1R,2R-diamine)], VPA, PA, and the reference drug oxaliplatin. The synthesized complexes showed pro-apoptotic and pro-necrotic effects and the ability to induce cell cycle alterations. Moreover, the downregulation of histone deacetylase activity, leading to an increase in histone H3 and H4 levels, and the antimigratory activity, indicated by the reduction of the levels of matrix metalloproteinases MMP2 and MMP9, demonstrated the multiaction nature of the complexes, which showed biological properties similar to or better than those of VPA and PA, but at lower concentrations, probably due to the lipophilicity of the combo molecule that increases the intracellular concentration of the single components (i.e., [PtCl2(cyclohexane-1R,2R-diamine)], VPA and PA).
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Affiliation(s)
- Elisabetta Gabano
- Dipartimento per lo Sviluppo Sostenibile e la Transizione Ecologica, Università del Piemonte Orientale, Piazza Sant'Eusebio 5, 13100 Vercelli, Italy
| | - Marzia Bruna Gariboldi
- Dipartimento di Biotecnologie e Scienze della Vita (DBSV), Università dell'Insubria, via Dunant 3, Varese, Italy
| | - Emanuela Marras
- Dipartimento di Biotecnologie e Scienze della Vita (DBSV), Università dell'Insubria, via Dunant 3, Varese, Italy
| | - Francesca Barbato
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Michel 11, 15121 Alessandria, Italy.
| | - Mauro Ravera
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Michel 11, 15121 Alessandria, Italy.
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3
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Ondar EE, Polynski MV, Ananikov VP. Predicting 195 Pt NMR Chemical Shifts in Water-Soluble Inorganic/Organometallic Complexes with a Fast and Simple Protocol Combining Semiempirical Modeling and Machine Learning. Chemphyschem 2023:e202200940. [PMID: 36806426 DOI: 10.1002/cphc.202200940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/20/2023] [Accepted: 02/20/2023] [Indexed: 02/23/2023]
Abstract
Water-soluble Pt complexes are the key components in medicinal chemistry and catalysis. The well-known cisplatin family of anticancer drugs and industrial hydrosylilation catalysts are two leading examples. On the molecular level, the activity mechanisms of such complexes mostly involve changes in the Pt coordination sphere. Using 195 Pt NMR spectroscopy for operando monitoring would be a valuable tool for uncovering the activity mechanisms; however, reliable approaches for the rapid correlation of Pt complex structure with 195 Pt chemical shifts are very challenging and not available for everyday research practice. While NMR shielding is a response property, molecular 3D structure determines NMR spectra, as widely known, which allows us to build up 3D structure to 195 Pt chemical shift correlations. Accordingly, we present a new workflow for the determination of lowest-energy configurational/conformational isomers based on the GFN2-xTB semiempirical method and prediction of corresponding chemical shifts with a Machine Learning (ML) model tuned for Pt complexes. The workflow was designed for the prediction of 195 Pt chemical shifts of water-soluble Pt(II) and Pt(IV) anionic, neutral, and cationic complexes with halide, NO2 - , (di)amino, and (di)carboxylate ligands with chemical shift values ranging from -6293 to 7090 ppm. The model offered an accuracy (normalized root-mean-square deviation/RMSD) of 1.08 %/145.02 ppm on the held-out test set.
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Affiliation(s)
- Evgeniia E Ondar
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Mikhail V Polynski
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia.,Scientific Technological Center of Organic and Pharmaceutical Chemistry, National Academy of Sciences, 26 Azatutyan Ave, 0014, Yerevan, Armenia
| | - Valentine P Ananikov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
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4
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Predicting Pt-195 NMR Chemical Shift and 1J(195Pt-31P) Coupling Constant for Pt(0) Complexes Using the NMR-DKH Basis Sets. MAGNETOCHEMISTRY 2021. [DOI: 10.3390/magnetochemistry7110148] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Pt(0) complexes have been widely used as catalysts for important reactions, such as the hydrosilylation of olefins. In this context, nuclear magnetic resonance (NMR) spectroscopy plays an important role in characterising of new structures and elucidating reaction mechanisms. In particular, the Pt-195 NMR is fundamental, as it is very sensitive to the ligand type and the oxidation state of the metal. In the present study, quantum mechanics computational schemes are proposed for the theoretical prediction of the Pt-195 NMR chemical shift and 1J(195Pt–31P) in Pt(0) complexes. The protocols were constructed using the B3LYP/LANL2DZ/def2-SVP/IEF-PCM(UFF) level for geometry optimization and the GIAO-PBE/NMR-DKH/IEF-PCM(UFF) level for NMR calculation. The NMR fundamental quantities were then scaled by empirical procedures using linear correlations. For a set of 30 Pt(0) complexes, the results showed a mean absolute deviation (MAD) and mean relative deviation (MRD) of only 107 ppm and 2.3%, respectively, for the Pt-195 NMR chemical shift. When the coupling constant is taken into account, the MAD and MRD for a set of 33 coupling constants in 26 Pt(0) complexes were of 127 Hz and 3.3%, respectively. In addition, the models were validated for a group of 17 Pt(0) complexes not included in the original group that had MAD/MRD of 92 ppm/1.7% for the Pt-195 NMR chemical shift and 146 Hz/3.6% for the 1J(195Pt–31P).
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5
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Ravera M, Gabano E, Zanellato I, Rangone B, Perin E, Ferrari B, Bottone MG, Osella D. Cis,cis,trans-[Pt IVCl 2(NH 3) 2(perillato) 2], a dual-action prodrug with excellent cytotoxic and antimetastatic activity. Dalton Trans 2021; 50:3161-3177. [PMID: 33595015 DOI: 10.1039/d0dt04051g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Two Pt(iv) conjugates containing one or two molecules of perillic acid (4-isopropenylcyclohexene-1-carboxylic acid), an active metabolite of limonene, were synthesized both with traditional and microwave-assisted methods and characterized. Their antiproliferative activity was tested on a panel of human tumor cell lines. In particular, cis,cis,trans-[PtIVCl2(NH3)2(perillato)2] exhibited excellent antiproliferative and antimetastatic activity on A-549 lung tumor cells at nanomolar concentrations. A number of in vitro biological tests were performed to decipher some aspects of its mechanism of action, including transwell migration and invasion as well as wound healing assay.
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Affiliation(s)
- Mauro Ravera
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Michel 11, 15121 Alessandria, Italy.
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6
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Benedetti M, De Castro F, Papadia P, Antonucci D, Fanizzi FP. 195
Pt and
15
N NMR Data in Square Planar Platinum(II) Complexes of the Type [Pt(NH
3
)
a
X
b
]
n
(X
b
= Combination of Halides): “
NMR Effective Molecular Radius
” of Coordinated Ammonia. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000474] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Michele Benedetti
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), Università del Salento Via Monteroni 73100 Lecce Italy
| | - Federica De Castro
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), Università del Salento Via Monteroni 73100 Lecce Italy
| | - Paride Papadia
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), Università del Salento Via Monteroni 73100 Lecce Italy
| | - Daniela Antonucci
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), Università del Salento Via Monteroni 73100 Lecce Italy
| | - Francesco P. Fanizzi
- Department of Biological and Environmental Sciences and Technologies (DiSTeBA), Università del Salento Via Monteroni 73100 Lecce Italy
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7
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Boulet MHC, Marsh LK, Howarth A, Woolman A, Farrer NJ. Oxaliplatin and [Pt(R,R-DACH)(panobinostat -2H)] show nanomolar cytotoxicity towards diffuse intrinsic pontine glioma (DIPG). Dalton Trans 2020; 49:5703-5710. [PMID: 32297619 DOI: 10.1039/c9dt04862f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
We report the synthesis of two novel platinum(ii) complexes which incorporate histone deacetylase (HDAC) inhibitors: [PtII(R,R-DACH)(Sub-H)] (1), [PtII(R,R-DACH)(panobinostat-2H)] (2), where SubH = suberoyl-bis-hydroxamic acid; DACH = (1R,2R)-(-)-1,2-diaminocyclohexane and panobinostat = (E)-N-hydroxy-3-[4-[[2-(2-methyl-1H-indol-3-yl)ethylamino]methyl]phenyl]prop-2-enamide. Complexes 1 and 2 were characterised by 1H, 13C, 195Pt NMR spectroscopy and ESI-MS. Whilst oxaliplatin demonstrated considerable cytotoxicity in two patient-derived low-passage paediatric glioma DIPG cell lines (IC50 values of 0.333 μM in SU-DIPG-IV, and 0.135 μM in SU-DIPG-XXI), complex 2 showed even greater cytotoxicities, with IC50 values of 0.021 μM (SU-DIPG-IV), 0.067 μM (BIOMEDE 194) and 0.009 μM (SU-DIPG-XXI). Complex 2 also demonstrated superior aqueous solubility in comparison to panobinostat. Complex 2 released free intact panobinostat under HPLC conditions, as determined by ESI-MS. Incubation of solutions of oxaliplatin (H2O) and panobinostat (DMF) resulted in instantaneous reactivity and precipitation of a panobinostat derivative which was not a platinum complex; the same reactivity was not observed between carboplatin and panobinostat.
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Affiliation(s)
- Marie H C Boulet
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, Oxford, OX1 3TA, UK.
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8
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Carvalho J, Paschoal D, Fonseca Guerra C, Dos Santos H. Nonrelativistic protocol for calculating the 1J(195Pt-15N) coupling constant in Pt(II)-complexes using all-electron Gaussian basis-set. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137279] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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9
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Chambrier I, Hughes DL, Jeans RJ, Welch AJ, Budzelaar PHM, Bochmann M. Do Gold(III) Complexes Form Hydrogen Bonds? An Exploration of Au III Dicarboranyl Chemistry. Chemistry 2020; 26:939-947. [PMID: 31721328 DOI: 10.1002/chem.201904790] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Indexed: 01/15/2023]
Abstract
The reaction of 1,1'-Li2 [(2,2'-C2 B10 H10 )2 ] with the cyclometallated gold(III) complex (C^N)AuCl2 afforded the first examples of gold(III) dicarboranyl complexes. The reactivity of these complexes is subject to the trans-influence exerted by the dicarboranyl ligand, which is substantially weaker than that of non-carboranyl anionic C-ligands. In line with this, displacement of coordinated pyridine by chloride is only possible under forcing conditions. While treatment of (C^N)Au{(2,2'-C2 B10 H10 )2 } (2) with triflic acid leads to Au-C rather than Au-N bond protonolysis, aqueous HBr cleaves the Au-N bond to give the pyridinium bromo complex 7. The trans-influence of a series of ligands including dicarboranyl and bis(dicarboranyl) was assessed by means of DFT calculations. The analysis demonstrated that it was not sufficient to rely exclusively on geometric descriptors (calculated or experimental) when attempting to rank ligands for their trans influence. Complex (C^N)Au(C2 B10 H11 )2 containing two non-chelating dicarboranyl ligands was prepared similar to 2. Its reaction with trifluoroacetic acid also leads to Au-N cleavage to give trans-(Hpy^C)Au(OAcF )(C2 B10 H11 )2 (8). In crystals of 8 the pyridinium N-H bond points towards the metal centre, while in 7 it is bent away. The possible contribution of gold(III)⋅⋅⋅H-N hydrogen bonding in these complexes was investigated by DFT calculations. The results show that, unlike the situation for platinum(II), there is no evidence for an energetically significant contribution by hydrogen bonding in the case of gold(III).
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Affiliation(s)
- Isabelle Chambrier
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - David L Hughes
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
| | - Rebekah J Jeans
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK
| | - Alan J Welch
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK
| | - Peter H M Budzelaar
- Department of Chemistry, University of Naples Federico II, Via Cintia, 80126, Naples, Italy
| | - Manfred Bochmann
- School of Chemistry, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK
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10
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Rendón-López VM, Castro ÁJA, Alvarado Monzón JC, Cristóbal C, Gonzalez GG, Montiel SG, Serrano O, Lopez JA. Ni(II), Pd(II) and Pt(II) complexes with SacNac tridentate ligand. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.01.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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11
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Gabano E, Ravera M, Perin E, Zanellato I, Rangone B, McGlinchey MJ, Osella D. Synthesis and characterization of cyclohexane-1R,2R-diamine-based Pt(iv) dicarboxylato anticancer prodrugs: their selective activity against human colon cancer cell lines. Dalton Trans 2019; 48:435-445. [PMID: 30539948 DOI: 10.1039/c8dt03950j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Three pairs of asymmetric dicarboxylato derivatives based on the cisplatin and oxaliplatin-like skeletons have been synthesized de novo or re-synthesized. The axial ligands consist of one medium-chain fatty acid (MCFA), namely clofibrate (i.e. 2-(p-chlorophenoxy)-2-methylpropionic acid, CA), heptanoate (HA) or octanoate (OA), respectively, and an inactive acetato ligand that imparts acceptable water solubility to such conjugates. Stability tests provided evidence for the partial formation of two hydrolyzed products, corresponding to two monoaqua diastereomers derived from the substitution of an equatorial chlorido ligand with a water molecule. The complexes have been tested on three different colon cancer cell lines having different histological history, and also on the cisplatin-sensitive A2780 ovarian cancer cell line for comparison. This allowed the evaluation not only of the increase in activity on passing from Pt(ii) to Pt(iv) derivatives, but also the selectivity towards colon cancer cells brought about by the cyclohexane-1R,2R-diamine carrier ligand.
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Affiliation(s)
- E Gabano
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Viale Michel 11, 15121 Alessandria, Italy.
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12
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Smiłowicz D, Metzler-Nolte N. Synthesis of monofunctional platinum(iv) carboxylate precursors for use in Pt(iv)-peptide bioconjugates. Dalton Trans 2018; 47:15465-15476. [PMID: 30334055 DOI: 10.1039/c8dt03082k] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Herein we present platinum(iv) bioconjugates with polyarginine peptides as prospective prodrug delivery systems. Asymmetrical platinum(iv) complexes 3 were obtained via oxidation of parent platinum(ii) complexes 2 with N-bromosuccinimide (NBS) in the presence of succinic anhydride. The combination of these two oxidation reagents furnishes the platinum(iv) environment with two different axial ligands, one of which bears a free carboxylic acid. All platinum(ii) and (iv) compounds were characterized by FT-IR, ESI-MS, HPLC, 1H-, 13C- and 195Pt-NMR. Standard solid-phase peptide chemistry was used for the synthesis of polyarginine (R9) peptides. Coupling of the platinum complexes with peptides N-terminally afforded peptide monoconjugates, which were purified by semi-preparative HPLC and characterized by analytical HPLC and ESI-MS. Platinum(iv)-peptide bioconjugates as well as platinum(ii) and platinum(iv) complexes were tested as cytotoxic agents against two different human cancer cell lines (MCF-7, HepG2) and normal human fibroblasts cell lines (GM5657T). Preliminary in vitro data showed that all platinum(iv) complexes exhibit lower activity than their platinum(ii) precursors towards most cell lines. Interestingly, in the case of HepG2 cells, the Pt(iv)-(R)9-G-A-L bioconjugate (4a) showed even higher activity compared to the non-targeting platinum(iv) parent compound.
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Affiliation(s)
- Dariusz Smiłowicz
- Inorganic Chemistry I - Bioinorganic Chemistry, Faculty of Chemistry and Biochemistry, Ruhr-University Bochum, Universitätsstraße 150, 44801 Bochum, Germany.
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13
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Wang H, Lv B, Tang Z, Zhang M, Ge W, Liu Y, He X, Zhao K, Zheng X, He M, Bu W. Scintillator-Based Nanohybrids with Sacrificial Electron Prodrug for Enhanced X-ray-Induced Photodynamic Therapy. NANO LETTERS 2018; 18:5768-5774. [PMID: 30052464 DOI: 10.1021/acs.nanolett.8b02409] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
X-ray-induced photodynamic therapy (X-PDT) has high depth of penetration and has considerable potential for applications in cancer therapy. Scintillators and heavy metals have been adopted to absorb X-rays and transmit the energy to photosensitizers. However, the low efficiency of converting X-rays to reactive oxygen species (ROS) presents a challenge for the use of X-PDT to cure cancer. In this study, a new method based on LiLuF4:Ce@SiO2@Ag3PO4@Pt(IV) nanoparticles (LAPNP) is presented that could be used to enhance the curative effects of X-PDT. To make full use of the fluorescence produced by nanoscintillators (LiLuF4:Ce), a cisplatin prodrug Pt(IV) was utilized as a sacrificial electron acceptor to increase the yield of hydroxyl radicals (·OH) by increasing the separation of electrons and holes in photosensitizers (Ag3PO4). Additionally, cisplatin is produced upon the acceptance of electrons by Pt(IV) and further enhances the damage caused by ·OH. Via two-step amplification, the potential of LAPNP to enhance the effects of X-PDT has been demonstrated.
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Affiliation(s)
- Han Wang
- State Key Laboratory of High-Performance Ceramics and Superfine Microstructure , Shanghai Institute of Ceramics, Chinese Academy of Sciences , Shanghai 200050 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Bin Lv
- Department of Radiation Oncology, Shanghai Huadong Hospital , Fudan University , Shanghai 200040 , China
| | - Zhongmin Tang
- State Key Laboratory of High-Performance Ceramics and Superfine Microstructure , Shanghai Institute of Ceramics, Chinese Academy of Sciences , Shanghai 200050 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Meng Zhang
- State Key Laboratory of High-Performance Ceramics and Superfine Microstructure , Shanghai Institute of Ceramics, Chinese Academy of Sciences , Shanghai 200050 , China
- University of Chinese Academy of Sciences , Beijing 100049 , China
| | - Weiqiang Ge
- Department of Radiation Oncology, Shanghai Huadong Hospital , Fudan University , Shanghai 200040 , China
| | - Yanyan Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering , East China Normal University , Shanghai 200062 , China
| | - Xinhong He
- Department of Radiology, Shanghai Cancer Hospital , Fudan University , Shanghai 200032 , China
| | - Kuaile Zhao
- Department of Radiology, Shanghai Cancer Hospital , Fudan University , Shanghai 200032 , China
| | - Xiangpeng Zheng
- Department of Radiation Oncology, Shanghai Huadong Hospital , Fudan University , Shanghai 200040 , China
| | - Mingyuan He
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering , East China Normal University , Shanghai 200062 , China
| | - Wenbo Bu
- State Key Laboratory of High-Performance Ceramics and Superfine Microstructure , Shanghai Institute of Ceramics, Chinese Academy of Sciences , Shanghai 200050 , China
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering , East China Normal University , Shanghai 200062 , China
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14
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Vasilchenko DB, Tkachev SV, Tsipis AC. Aquanitrato Complexes of Palladium, Rhodium, and Platinum: A Comparative 15
N NMR and DFT Study. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701140] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Danila B. Vasilchenko
- Nikolaev Institute of Inorganic Chemistry; Siberian Branch of the Russian Academy of Science; 630090 Novosibirsk Russia
- Novosibirsk State University; 630090 Novosibirsk Russia
| | - Sergey V. Tkachev
- Nikolaev Institute of Inorganic Chemistry; Siberian Branch of the Russian Academy of Science; 630090 Novosibirsk Russia
| | - Athanassios C. Tsipis
- Laboratory of Inorganic and General Chemistry; University of Ioannina; 45110 Ioannina Greece
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15
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Gagini T, Colina-Vegas L, Villarreal W, Borba-Santos LP, de Souza Pereira C, Batista AA, Kneip Fleury M, de Souza W, Rozental S, Costa LAS, Navarro M. Metal–azole fungistatic drug complexes as anti-Sporothrix spp. agents. NEW J CHEM 2018. [DOI: 10.1039/c8nj01544a] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal–antifungal drug complexes were investigated against fungus causing of sporotrichosis. They were more active against fungal cells than to mammalian cells.
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16
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Application of Heteronuclear NMR Spectroscopy to Bioinorganic and Medicinal Chemistry ☆. REFERENCE MODULE IN CHEMISTRY, MOLECULAR SCIENCES AND CHEMICAL ENGINEERING 2018. [PMCID: PMC7157447 DOI: 10.1016/b978-0-12-409547-2.10947-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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17
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Gabano E, Ravera M, Trivero F, Tinello S, Gallina A, Zanellato I, Gariboldi MB, Monti E, Osella D. The cisplatin-based Pt(iv)-diclorofibrato multi-action anticancer prodrug exhibits excellent performances also under hypoxic conditions. Dalton Trans 2018; 47:8268-8282. [DOI: 10.1039/c7dt04614f] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The cisplatin/clofibrato combos are multi-action Pt(iv) complexes active on a panel of human tumor cell lines, also under hypoxic conditions.
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Affiliation(s)
- Elisabetta Gabano
- Dipartimento di Scienze e Innovazione Tecnologica
- Università del Piemonte Orientale
- 15121 Alessandria
- Italy
| | - Mauro Ravera
- Dipartimento di Scienze e Innovazione Tecnologica
- Università del Piemonte Orientale
- 15121 Alessandria
- Italy
| | - Francesca Trivero
- Dipartimento di Scienze e Innovazione Tecnologica
- Università del Piemonte Orientale
- 15121 Alessandria
- Italy
| | - Stefano Tinello
- Dipartimento di Scienze e Innovazione Tecnologica
- Università del Piemonte Orientale
- 15121 Alessandria
- Italy
| | - Andrea Gallina
- Dipartimento di Scienze e Innovazione Tecnologica
- Università del Piemonte Orientale
- 15121 Alessandria
- Italy
| | - Ilaria Zanellato
- Dipartimento di Scienze e Innovazione Tecnologica
- Università del Piemonte Orientale
- 15121 Alessandria
- Italy
| | - Marzia B. Gariboldi
- Dipartimento di Biotecnologie e Scienze della Vita
- Università dell'Insubria
- 21052 Busto Arsizio
- Italy
| | - Elena Monti
- Dipartimento di Biotecnologie e Scienze della Vita
- Università dell'Insubria
- 21052 Busto Arsizio
- Italy
| | - Domenico Osella
- Dipartimento di Scienze e Innovazione Tecnologica
- Università del Piemonte Orientale
- 15121 Alessandria
- Italy
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18
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Tsipis AC, Karapetsas IN. 195 Pt NMR parameters as strong descriptors in one-parameter QSAR models for platinum-based antitumor compounds. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2017; 55:662-669. [PMID: 28002879 DOI: 10.1002/mrc.4570] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 11/25/2016] [Accepted: 12/18/2016] [Indexed: 06/06/2023]
Abstract
Highly predictive one-parameter quantitative structure-activity relationship models have been developed for platinum-based anticancer drugs using the 195 Pt NMR parameters as strong descriptors. The developed quantitative structure-activity relationship models were applied in diverse homogeneous sets of antiproliferative Pt(II) and Pt(IV) compounds. These observations form the basis for making predictions of cytotoxicity for a broad range of platinum-based antitumor compounds just from inspection of calculated or experimentally determined 195 Pt NMR parameters. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Athanassios C Tsipis
- Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, 451 10, Ioannina, Greece
| | - Ioannis N Karapetsas
- Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, 451 10, Ioannina, Greece
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19
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Šebesta F, Burda JV. Side Reactions with an Equilibrium Constraint: Detailed Mechanism of the Substitution Reaction of Tetraplatin with dGMP as a Starting Step of the Platinum(IV) Reduction Process. J Phys Chem B 2017; 121:4400-4413. [PMID: 28394593 DOI: 10.1021/acs.jpcb.7b01427] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Two possible pathways of the substitution reaction within the reduction process of the PtIV(DACH)Cl4 by dGMP are compared: associative reaction course and autocatalytic Basolo-Pearson mechanisms. Since two forms: single-protonated and fully deprotonated phosphate group of dGMP are present in equilibrium at neutral and mildly acidic solutions, consideration of a side reactions scheme with acido-basic equilibrium-constraint is a very important model for obtaining reliable results. The examined complexes are optimized at the B3LYP-GD3BJ/6-31G(d) level with the COSMO implicit solvation model and Klamt's radii used for cavity construction. Energy characteristics and thermodynamics for all reaction branches are determined using the B3LYP-GD3BJ/6-311++G(2df,2pd)/IEF-PCM/scaled-UAKS level with Wertz's entropy corrections. Rate constants are estimated for each individual branch according to Eyring's transition state theory (TST), averaged according to equilibrium constraint and compared with available experimental data. The determined reaction barriers of the autocatalytic pathway fairly correspond with experimental values. Furthermore, autocatalytic reaction of tetraplatin and its two analogues complexes [PtIV(en)Cl4 and PtIV(NH3)2Cl4] are explored and compared with measured data in order to examined general reaction descriptors.
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Affiliation(s)
- Filip Šebesta
- Department of Chemical Physics and Optics, Faculty of Mathematics and Physics, Charles University , Ke Karlovu 3, 121 16 Prague 2, Czech Republic
| | - Jaroslav V Burda
- Department of Chemical Physics and Optics, Faculty of Mathematics and Physics, Charles University , Ke Karlovu 3, 121 16 Prague 2, Czech Republic
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20
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Ryan DE, Cardin DJ, Hartl F. η3-Allyl carbonyl complexes of group 6 metals: Structural aspects, isomerism, dynamic behaviour and reactivity. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2016.12.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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21
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Nickolaus J, Imbrich DA, Schlindwein SH, Geyer AH, Nieger M, Gudat D. Phosphenium Hydride Reduction of [(cod)MX2] (M = Pd, Pt; X = Cl, Br): Snapshots on the Way to Phosphenium Metal(0) Halides and Synthesis of Metal Nanoparticles. Inorg Chem 2017; 56:3071-3080. [DOI: 10.1021/acs.inorgchem.7b00022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Jan Nickolaus
- Institute
of Inorganic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70550 Stuttgart, Germany
| | - Dominik A. Imbrich
- Institute
of Inorganic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70550 Stuttgart, Germany
| | - Simon H. Schlindwein
- Institute
of Inorganic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70550 Stuttgart, Germany
| | - Adrian H. Geyer
- Institute
of Inorganic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70550 Stuttgart, Germany
| | - Martin Nieger
- Department
of Chemistry, University of Helsinki, P.O Box 55 (A.I. Virtasen Aukio
1), 00014 Helsinki, Finland
| | - Dietrich Gudat
- Institute
of Inorganic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70550 Stuttgart, Germany
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22
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Tsipis AC, Karapetsas IN. Prediction of 195 Pt NMR of photoactivable diazido- and azine-Pt(IV) anticancer agents by DFT computational protocols. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2017; 55:145-153. [PMID: 27628024 DOI: 10.1002/mrc.4523] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 09/03/2016] [Accepted: 09/05/2016] [Indexed: 06/06/2023]
Abstract
195 Pt NMR chemical shifts for a series of large-sized photoactivable anticancer diazido-Pt(IV), homopiperizine-Pt(IV) and multifunctional azine-Pt(IV) complexes hardly to be probed experimentally and by sophisticated four-component and two-component relativistic calculations are predicted with high accuracy by density functional theory computational protocols. The calculated 195 Pt NMR chemical shifts constitute a crucial descriptor for making highly predictive one-parameter quantitative structure activity relationships models that help in designing photoactivable Pt(IV)-based antitumor agents with high cytotoxicity and selectivity. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Athanassios C Tsipis
- Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, Ioannina, Greece
| | - Ioannis N Karapetsas
- Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, Ioannina, Greece
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23
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Baddour FG, Hyre AS, Guillet JL, Pascual D, Lopez-de-Luzuriaga JM, Alam TM, Bacon JW, Doerrer LH. Pt–Mg, Pt–Ca, and Pt–Zn Lantern Complexes and Metal-Only Donor–Acceptor Interactions. Inorg Chem 2016; 56:452-469. [DOI: 10.1021/acs.inorgchem.6b02372] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Frederick G. Baddour
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Ariel S. Hyre
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Jesse L. Guillet
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - David Pascual
- Departamento
de Química, Centro de Investigación en Síntesis
Química, Universidad de La Rioja, Madre de Dios, 51, 26004 Logroño, Spain
| | - José Maria Lopez-de-Luzuriaga
- Departamento
de Química, Centro de Investigación en Síntesis
Química, Universidad de La Rioja, Madre de Dios, 51, 26004 Logroño, Spain
| | - Todd M. Alam
- Department of Organic Material Science, Sandia National Laboratories, Albuquerque, New Mexico 87185-0886, United States
| | - Jeffrey W. Bacon
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
| | - Linda H. Doerrer
- Department of Chemistry, Boston University, Boston, Massachusetts 02215, United States
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24
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Nosova YN, Foteeva LS, Zenin IV, Fetisov TI, Kirsanov KI, Yakubovskaya MG, Antonenko TA, Tafeenko VA, Aslanov LA, Lobas AA, Gorshkov MV, Galanski M, Keppler BK, Timerbaev AR, Milaeva ER, Nazarov AA. Enhancing the Cytotoxic Activity of Anticancer PtIVComplexes by Introduction of Lonidamine as an Axial Ligand. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600857] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Yulia N. Nosova
- Lomonosov Moscow State University; Department of Medicinal Chemistry and Fine Organic Synthesis; Leninskie Gory 1/3 119991 Moscow Russian Federation
| | - Lidia S. Foteeva
- Vernadsky Institute of Geochemistry and Analytical Chemistry; Kosygin St. 19 119991 Moscow Russian Federation
| | - Ilia V. Zenin
- Lomonosov Moscow State University; Department of Medicinal Chemistry and Fine Organic Synthesis; Leninskie Gory 1/3 119991 Moscow Russian Federation
| | - Timur I. Fetisov
- Blokhin Cancer Research Center RAMS; Kashirskoye Shosse 24 115478 Moscow Russian Federation
| | - Kirill I. Kirsanov
- Blokhin Cancer Research Center RAMS; Kashirskoye Shosse 24 115478 Moscow Russian Federation
| | | | - Taisya A. Antonenko
- Lomonosov Moscow State University; Department of Medicinal Chemistry and Fine Organic Synthesis; Leninskie Gory 1/3 119991 Moscow Russian Federation
| | - Viktor A. Tafeenko
- Lomonosov Moscow State University; Department of Medicinal Chemistry and Fine Organic Synthesis; Leninskie Gory 1/3 119991 Moscow Russian Federation
| | - Leonid A. Aslanov
- Lomonosov Moscow State University; Department of Medicinal Chemistry and Fine Organic Synthesis; Leninskie Gory 1/3 119991 Moscow Russian Federation
| | - Anna A. Lobas
- Institute for Energy Problems of Chemical Physics; Russian Academy of Sciences; Leninsky Pr. 38, Bld. 2 119334 Moscow Russian Federation
| | - Mikhail V. Gorshkov
- Institute for Energy Problems of Chemical Physics; Russian Academy of Sciences; Leninsky Pr. 38, Bld. 2 119334 Moscow Russian Federation
- Moscow Institute of Physics and Technology (State University); Institutskiy per. 9 141700 Dolgoprudny Russian Federation
| | - Markus Galanski
- Institute of Inorganic Chemistry; University of Vienna; Waehringer Str. 42 1019 Vienna Austria
| | - Bernhard K. Keppler
- Institute of Inorganic Chemistry; University of Vienna; Waehringer Str. 42 1019 Vienna Austria
| | - Andrei R. Timerbaev
- Vernadsky Institute of Geochemistry and Analytical Chemistry; Kosygin St. 19 119991 Moscow Russian Federation
| | - Elena R. Milaeva
- Lomonosov Moscow State University; Department of Medicinal Chemistry and Fine Organic Synthesis; Leninskie Gory 1/3 119991 Moscow Russian Federation
| | - Alexey A. Nazarov
- Lomonosov Moscow State University; Department of Medicinal Chemistry and Fine Organic Synthesis; Leninskie Gory 1/3 119991 Moscow Russian Federation
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25
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Paschoal D, Guerra CF, de Oliveira MAL, Ramalho TC, Dos Santos HF. Predicting Pt-195 NMR chemical shift using new relativistic all-electron basis set. J Comput Chem 2016; 37:2360-73. [DOI: 10.1002/jcc.24461] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Revised: 05/23/2016] [Accepted: 07/13/2016] [Indexed: 01/26/2023]
Affiliation(s)
- D. Paschoal
- NEQC: Núcleo de Estudos em Química Computacional, Departamento de Química - ICE, Universidade Federal de Juiz de Fora, Campus Universitário, 36.036-900; Juiz de Fora MG Brasil
- NQTCM: Núcleo de Química Teórica e Computacional de Macaé, Polo Ajuda, Universidade Federal do Rio de Janeiro, Campus UFRJ-Macaé, 27.971-525; Macaé RJ Brasil
| | - C. Fonseca Guerra
- Department of Theoretical Chemistry and Amsterdam Center for Multiscale Modeling; Vrije Universiteit Amsterdam; De Boelelaan 1083 Amsterdam HV 1081 the Netherlands
| | - M. A. L. de Oliveira
- GQAQ: Grupo de Química Analítica e Quimiometria, Departamento de Química - ICE, Universidade Federal de Juiz de Fora, Campus Universitário, 36.036-900; Juiz de Fora MG Brasil
| | - T. C. Ramalho
- GQC: Grupo de Química Computacional, Departamento de Química, Universidade Federal de Lavras, 37.200-000; Lavras MG Brasil
| | - H. F. Dos Santos
- NEQC: Núcleo de Estudos em Química Computacional, Departamento de Química - ICE, Universidade Federal de Juiz de Fora, Campus Universitário, 36.036-900; Juiz de Fora MG Brasil
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26
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Tsipis AC, Karapetsas IN. Prediction of (195) Pt NMR chemical shifts of dissolution products of H2 [Pt(OH)6 ] in nitric acid solutions by DFT methods: how important are the counter-ion effects? MAGNETIC RESONANCE IN CHEMISTRY : MRC 2016; 54:656-664. [PMID: 26990565 DOI: 10.1002/mrc.4426] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 01/22/2016] [Accepted: 02/10/2016] [Indexed: 06/05/2023]
Abstract
(195) Pt NMR chemical shifts of octahedral Pt(IV) complexes with general formula [Pt(NO3 )n (OH)6 - n ](2-) , [Pt(NO3 )n (OH2 )6 - n ](4 - n) (n = 1-6), and [Pt(NO3 )6 - n - m (OH)m (OH2 )n ](-2 + n - m) formed by dissolution of platinic acid, H2 [Pt(OH)6 ], in aqueous nitric acid solutions are calculated employing density functional theory methods. Particularly, the gauge-including atomic orbitals (GIAO)-PBE0/segmented all-electron relativistically contracted-zeroth-order regular approximation (SARC-ZORA)(Pt) ∪ 6-31G(d,p)(E)/Polarizable Continuum Model computational protocol performs the best. Excellent second-order polynomial plots of δcalcd ((195) Pt) versus δexptl ((195) Pt) chemical shifts and δcalcd ((195) Pt) versus the natural atomic charge QPt are obtained. Despite of neglecting relativistic and spin orbit effects the good agreement of the calculated δ (195) Pt chemical shifts with experimental values is probably because of the fact that the contribution of relativistic and spin orbit effects to computed σ(iso) (195) Pt magnetic shielding of Pt(IV) coordination compounds is effectively cancelled in the computed δ (195) Pt chemical shifts, because the relativistic corrections are expected to be similar in the complexes and the proper reference standard used. To probe the counter-ion effects on the (195) Pt NMR chemical shifts of the anionic [Pt(NO3 )n (OH)6 - n ](2-) and cationic [Pt(NO3 )n (OH2 )6 - n ](4 - n) (n = 0-3) complexes we calculated the (195) Pt NMR chemical shifts of the neutral (PyH)2 [Pt(NO3 )n (OH)6 - n ] (n = 1-6; PyH = pyridinium cation, C5 H5 NH(+) ) and [Pt(NO3 )n (H2 O)6 - n ](NO3 )4 - n (n = 0-3) complexes. Counter-anion effects are very important for the accurate prediction of the (195) Pt NMR chemical shifts of the cationic [Pt(NO3 )n (OH2 )6 - n ](4 - n) complexes, while counter-cation effects are less important for the anionic [Pt(NO3 )n (OH)6 - n ](2-) complexes. The simple computational protocol is easily implemented even by synthetic chemists in platinum coordination chemistry that dispose limited software availability, or locally existing routines and knowhow. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Athanassios C Tsipis
- Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, Ioannina, Greece
| | - Ioannis N Karapetsas
- Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, Ioannina, Greece
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27
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Aono S, Mori T, Sakaki S. 3D-RISM-MP2 Approach to Hydration Structure of Pt(II) and Pd(II) Complexes: Unusual H-Ahead Mode vs Usual O-Ahead One. J Chem Theory Comput 2016; 12:1189-206. [PMID: 26863511 DOI: 10.1021/acs.jctc.5b01137] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Solvation of transition metal complexes with water has been one of the fundamental topics in physical and coordination chemistry. In particular, Pt(II) complexes have recently attracted considerable interest for their relation to anticancer activity in cisplatin and its analogues, yet the interaction of the water molecule and the metal center has been obscured. The challenge from a theoretical perspective remains that both the microscopic solvation effect and the dynamical electron correlation (DEC) effect have to be treated simultaneously in a reasonable manner. In this work we derive the analytical gradient for the three-dimensional reference interaction site model Møller-Plesset second order (3D-RISM-MP2) free energy. On the basis of the three-regions 3D-RISM self-consistent field (SCF) method recently proposed by us, we apply a new layer of the Z-vector method to the CP-RISM equation as well as point-charge approximation to the derivatives with respect to the density matrix elements in the RISM-CPHF equation to remarkably reduce the computational cost. This method is applied to study the interaction of H2O with the d(8) square planar transition metal complexes in aqueous solution, trans-[Pt(II)Cl2(NH3)(glycine)] (1a), [Pt(II)(NH3)4](2+) (1b), [Pt(II)(CN)4](2-) (1c), and their Pd(II) analogues 2a, 2b, and 2c, respectively, to elucidate whether the usual H2O interaction through O atom (O-ahead mode) or unusual one through H atom (H-ahead mode) is stable in these complexes. We find that the interaction energy of the coordinating water and the transition metal complex changes little when switching from gas to aqueous phase, but the solvation free energy differs remarkably between the two interaction modes, thereby affecting the relative stability of the H-ahead and O-ahead modes. Particularly, in contrast to the expectation that the O-ahead mode is preferred due to the presence of positive charges in 1b, the H-ahead mode is also found to be more stable. The O-ahead mode is found to be more stable than the H-ahead one only in 2b. The energy decomposition analysis (EDA) at the 3D-RISM-MP2 level revealed that the O-ahead mode is stabilized by the electrostatic (ES) interaction, whereas the H-ahead one is mainly stabilized by the DEC effect. The ES interaction is also responsible for the difference between the Pd(II) and Pt(II) complexes; because the electrostatic potential is more negative along the z-axis in the Pt(II) complex than in the Pd(II) one, the O-ahead mode prefers the Pd(II) complexes, whereas the H-ahead becomes predominant in the Pt(II) complexes.
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Affiliation(s)
- Shinji Aono
- Fukui Institute for Fundamental Chemistry, Kyoto University , Nishihiraki-cho, Takano, Sakyo-ku, Kyoto 606-8103, Japan
| | - Toshifumi Mori
- Institute for Molecular Science , Okazaki, Aichi 444-8585, Japan.,School of Physical Sciences, The Graduate University for Advanced Studies , Okazaki, Aichi 444-8585, Japan
| | - Shigeyoshi Sakaki
- Fukui Institute for Fundamental Chemistry, Kyoto University , Nishihiraki-cho, Takano, Sakyo-ku, Kyoto 606-8103, Japan
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28
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Šebesta F, Burda JV. Reduction Process of Tetraplatin in the Presence of Deoxyguanosine Monophosphate (dGMP): A Computational DFT Study. Chemistry 2015; 22:1037-47. [PMID: 26663432 DOI: 10.1002/chem.201503555] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Revised: 10/15/2015] [Indexed: 01/01/2023]
Abstract
The reduction mechanism of [Pt(IV) (dach)Cl4 ] (dach=diaminocyclohexyl) in the presence of dGMP was studied. The first step is substitution of a chloro ligand by dGMP, followed by nucleophilic attack of a phosphate or sugar oxygen atom to the C8-position of guanine. Subsequent reduction forms the [Pt(II) (dach)Cl2 ] complex. The whole process is completed by a hydrolysis. Two different pathways for the substitution reaction were examined: a direct associative and a Basolo-Pearson autocatalytic mechanism. All the explored structures were optimized at the B3LYP-D3/6-31G(d) level and by using the COSMO solvation model with Klamt's radii. Single-point energetics was determined at the B3LYP-GD3BJ/6-311++G(2df,2pd)/PCM/scaled-UAKS level. Activation barriers were used for an estimation of the rate constants and these were compared with experimental values. It was found that the rate-determining step is the nucleophilic attack with a slightly faster performance in the 3'-dGMP branch than in the case of 5'-dGMP with activation barriers of 21.1 and 20.4 kcal mol(-1) (experimental: 23.8 and 23.2 kcal mol(-1) ). The reduction reaction is connected with an electron flow from guanine. The product of the reduction reaction is a chelate structure, which dissociates within the last reaction step, that is, a hydrolysis reaction. The whole redox process (substitution, reduction, and hydrolysis) is exergonic by 34 and 28 kcal mol(-1) for 5'-dGMP and 3'-dGMP, respectively.
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Affiliation(s)
- Filip Šebesta
- Department of Chemical Physics and Optics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16, Prague 2, Czech Republic
| | - Jaroslav V Burda
- Department of Chemical Physics and Optics, Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16, Prague 2, Czech Republic.
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29
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Tsipis AC, Karapetsas IN. Accurate prediction of 195Pt-NMR chemical shifts for hydrolysis products of [PtCl6]2− in acidic and alkaline aqueous solutions by non-relativistic DFT computational protocols. J COORD CHEM 2015. [DOI: 10.1080/00958972.2015.1083095] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Athanassios C. Tsipis
- Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, Ioannina, Greece
| | - Ioannis N. Karapetsas
- Laboratory of Inorganic and General Chemistry, Department of Chemistry, University of Ioannina, Ioannina, Greece
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30
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Benedetti M, Antonucci D, Girelli CR, Fanizzi FP. Hindrance, Donor Ability of Me
n
∩
NN
Chelates and Overall Stability of Pentacoordinate [PtCl
2
(η
2
‐CH
2
=CH
2
)(Me
n
∩
NN
)] Complexes as Observed by η
2
‐Olefin
1
J
Pt,C
Modulation: An NMR Study. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500103] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Michele Benedetti
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Università del Salento, via Monteroni, 73100 Lecce, Italy, http://www.unisalento.it/web/guest/home_page
| | - Daniela Antonucci
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Università del Salento, via Monteroni, 73100 Lecce, Italy, http://www.unisalento.it/web/guest/home_page
| | - Chiara R. Girelli
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Università del Salento, via Monteroni, 73100 Lecce, Italy, http://www.unisalento.it/web/guest/home_page
| | - Francesco P. Fanizzi
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Università del Salento, via Monteroni, 73100 Lecce, Italy, http://www.unisalento.it/web/guest/home_page
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31
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Benedetti M, de Castro F, Antonucci D, Papadia P, Fanizzi FP. General cooperative effects of single atom ligands on a metal: a195Pt NMR chemical shift as a function of coordinated halido ligands’ ionic radii overall sum. Dalton Trans 2015; 44:15377-81. [DOI: 10.1039/c5dt02285a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An inverse linear relationship between the experimentally observed195Pt NMR signals and the overall sum of coordinated halido X ligands’ ionic radii was discovered in Pt(ii) and Pt(iv) complexes.
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Affiliation(s)
- M. Benedetti
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali
- Università del Salento
- I-73100 Lecce
- Italy
| | - F. de Castro
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali
- Università del Salento
- I-73100 Lecce
- Italy
| | - D. Antonucci
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali
- Università del Salento
- I-73100 Lecce
- Italy
| | - P. Papadia
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali
- Università del Salento
- I-73100 Lecce
- Italy
| | - F. P. Fanizzi
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali
- Università del Salento
- I-73100 Lecce
- Italy
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32
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Ravera M, Gabano E, Pelosi G, Fregonese F, Tinello S, Osella D. A new entry to asymmetric platinum(IV) complexes via oxidative chlorination. Inorg Chem 2014; 53:9326-35. [PMID: 25121398 DOI: 10.1021/ic501446b] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Pt(IV) complexes are usually prepared by oxidation of the corresponding Pt(II) counterparts, typically using hydrogen peroxide or chlorine. A different way to synthesize asymmetrical Pt(IV) compounds is the oxidative chlorination of Pt(II) counterparts with N-chlorosuccinimide. The reaction between cisplatin cis-[PtCl2(NH3)2], carboplatin, cis-[PtCl2(dach)] and cis-[Pt(cbdc)(dach)] (cbdc = cyclobutane-1,1'-dicarboxylato; dach = cyclohexane-1R,2R-diamine) with N-chlorosuccinimide in ethane-1,2-diol was optimized to produce the asymmetric Pt(IV) octahedral complexes [PtA2Cl(glyc)X2] (A2 = 2 NH3 or dach; glyc = 2-hydroxyethanolato; X2 = 2 Cl or cbdc) in high yield and purity. The X-ray crystal structure of the [Pt(cbdc)Cl(dach)(glyc)] complex is also reported. Moreover, the oxidation method proved to be versatile enough to produce other mixed Pt(IV) derivatives varying the reaction medium. The two trichlorido complexes easily undergo a pH-dependent hydrolysis reaction, whereas the dicarboxylato compounds are stable enough to allow further coupling reactions for drug targeting and delivery via the glyc reactive pendant. Therefore, the coupling reaction between the [Pt(cbdc)Cl(dach)(glyc)] and a model carboxylic acid, a model amine, and selectively protected amino acids is reported.
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Affiliation(s)
- Mauro Ravera
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale "A. Avogadro" , Viale T. Michel 11, I-15121 Alessandria, Italy
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