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Jain AK, Gau MR, Carroll PJ, Goldberg KI. Comparing Square-Planar Rh I and Ir I: Metal–Ligand Proton Tautomerism, Fluxionality, and Reactivity. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anant Kumar Jain
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Michael R. Gau
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Patrick J. Carroll
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Karen I. Goldberg
- Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
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2
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Bogdanova EV, Stogniy MY, Suponitsky KY, Sivaev IB, Bregadze VI. Synthesis of Boronated Amidines by Addition of Amines to Nitrilium Derivative of Cobalt Bis(Dicarbollide). Molecules 2021; 26:6544. [PMID: 34770953 PMCID: PMC8588172 DOI: 10.3390/molecules26216544] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 10/26/2021] [Accepted: 10/28/2021] [Indexed: 11/16/2022] Open
Abstract
A series of novel cobalt bis(dicarbollide) based amidines were synthesized by the nucleophilic addition of primary and secondary amines to highly activated B-N+≡C-R triple bond of the propionitrilium derivative [8-EtC≡N-3,3'-Co(1,2-C2B9H10)(1',2'-C2B9H11)]. The reactions with primary amines result in the formation of mixtures of E and Z isomers of amidines, whereas the reactions with secondary amines lead selectively to the E-isomers. The crystal molecular structures of E-[8-EtC(NMe2)=HN-3,3'-Co(1,2-C2B9H10)(1',2'-C2B9H11)], E-[8-EtC(NEt2)=HN-3,3'-Co(1,2- C2B9H10)(1',2'-C2B9H11)] and E-[8-EtC(NC5H10)=HN-3,3'-Co(1,2-C2B9H10)(1',2'-C2B9H11)] were determined by single crystal X-ray diffraction.
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Affiliation(s)
- Ekaterina V. Bogdanova
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, 119991 Moscow, Russia; (E.V.B.); (K.Y.S.); (I.B.S.); (V.I.B.)
- M.V. Lomonosov Institute of Fine Chemical Technology, MIREA—Russian Technological University, 86 Vernadsky Av., 119571 Moscow, Russia
| | - Marina Yu. Stogniy
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, 119991 Moscow, Russia; (E.V.B.); (K.Y.S.); (I.B.S.); (V.I.B.)
- M.V. Lomonosov Institute of Fine Chemical Technology, MIREA—Russian Technological University, 86 Vernadsky Av., 119571 Moscow, Russia
| | - Kyrill Yu. Suponitsky
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, 119991 Moscow, Russia; (E.V.B.); (K.Y.S.); (I.B.S.); (V.I.B.)
- Basic Department of Chemistry of Innovative Materials and Technologies, G.V. Plekhanov Russian University of Economics, 36 Stremyannyi Line, 117997 Moscow, Russia
| | - Igor B. Sivaev
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, 119991 Moscow, Russia; (E.V.B.); (K.Y.S.); (I.B.S.); (V.I.B.)
| | - Vladimir I. Bregadze
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Street, 119991 Moscow, Russia; (E.V.B.); (K.Y.S.); (I.B.S.); (V.I.B.)
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3
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Intini FP, Zajac J, Novohradsky V, Saltarella T, Pacifico C, Brabec V, Natile G, Kasparkova J. Novel Antitumor Platinum(II) Conjugates Containing the Nonsteroidal Anti-inflammatory Agent Diclofenac: Synthesis and Dual Mechanisms of Antiproliferative Effects. Inorg Chem 2017; 56:1483-1497. [DOI: 10.1021/acs.inorgchem.6b02553] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
| | - Juraj Zajac
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Kralovopolska 135, 61265 Brno, Czech Republic
- Department of Biophysics, Faculty of Science, Palacky University, Slechtitelu 27, 78371 Olomouc, Czech Republic
| | - Vojtech Novohradsky
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Kralovopolska 135, 61265 Brno, Czech Republic
| | - Teresa Saltarella
- Department of Chemistry, University of Bari “Aldo Moro”, 70125 Bari, Italy
| | - Concetta Pacifico
- Department of Chemistry, University of Bari “Aldo Moro”, 70125 Bari, Italy
| | - Viktor Brabec
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Kralovopolska 135, 61265 Brno, Czech Republic
- Department of Biophysics, Faculty of Science, Palacky University, Slechtitelu 27, 78371 Olomouc, Czech Republic
| | - Giovanni Natile
- Department of Chemistry, University of Bari “Aldo Moro”, 70125 Bari, Italy
| | - Jana Kasparkova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Kralovopolska 135, 61265 Brno, Czech Republic
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4
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Corbin WC, Nichol GS, Zheng Z. Amidine Production by the Addition of NH 3 to Nitrile(s) Bound to and Activated by the Lewis Acidic [Re 6(μ 3-Se) 8] 2+ Cluster Core. Inorg Chem 2016; 55:9505-9508. [PMID: 27635439 DOI: 10.1021/acs.inorgchem.6b01643] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Acetonitrile bound to and activated by the Lewis acidic [Re6(μ3-Se)8]2+ cluster core was transformed into acetamidine in quantitative yield using NH3 as the nucleophile at room temperature. The amidine ligand was removed by treating the cluster-acetamidine complexes with trifluoroacetic acid in CH3CN, affording amidinium trifluoroacetate and the starting acetonitrile complexes.
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Affiliation(s)
- William C Corbin
- Department of Chemistry and Biochemistry, The University of Arizona , Tucson, Arizona 85721, United States
| | - Gary S Nichol
- School of Chemistry, The University of Edinburgh , David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Zhiping Zheng
- Department of Chemistry and Biochemistry, The University of Arizona , Tucson, Arizona 85721, United States
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5
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Pracharova J, Saltarella T, Radosova Muchova T, Scintilla S, Novohradsky V, Novakova O, Intini FP, Pacifico C, Natile G, Ilik P, Brabec V, Kasparkova J. Novel Antitumor Cisplatin and Transplatin Derivatives Containing 1-Methyl-7-Azaindole: Synthesis, Characterization, and Cellular Responses. J Med Chem 2014; 58:847-59. [DOI: 10.1021/jm501420k] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Jitka Pracharova
- Department
of Biophysics, Centre of the Region Hana for Biotechnological and
Agricultural Research, Palacky University, Slechtitelu 11, 783 41 Olomouc, Czech Republic
| | - Teresa Saltarella
- Department
of Chemistry, University of Bari “Aldo Moro”, 70125 Bari, Italy
| | - Tereza Radosova Muchova
- Department
of Biophysics, Centre of the Region Hana for Biotechnological and
Agricultural Research, Palacky University, Slechtitelu 11, 783 41 Olomouc, Czech Republic
| | - Simone Scintilla
- Department
of Chemistry, University of Bari “Aldo Moro”, 70125 Bari, Italy
| | - Vojtech Novohradsky
- Institute
of Biophysics, Academy of Sciences of the Czech Republic, v.v.i.,
Kralovopolska 135, CZ-61265 Brno, Czech Republic
- Department
of Biophysics, Faculty of Science, Palacky University in Olomouc, Slechtitelu 11, 78371 Olomouc, Czech Republic
| | - Olga Novakova
- Institute
of Biophysics, Academy of Sciences of the Czech Republic, v.v.i.,
Kralovopolska 135, CZ-61265 Brno, Czech Republic
| | | | - Concetta Pacifico
- Department
of Chemistry, University of Bari “Aldo Moro”, 70125 Bari, Italy
| | - Giovanni Natile
- Department
of Chemistry, University of Bari “Aldo Moro”, 70125 Bari, Italy
| | - Petr Ilik
- Department
of Biophysics, Centre of the Region Hana for Biotechnological and
Agricultural Research, Palacky University, Slechtitelu 11, 783 41 Olomouc, Czech Republic
| | - Viktor Brabec
- Department
of Biophysics, Faculty of Science, Palacky University in Olomouc, Slechtitelu 11, 78371 Olomouc, Czech Republic
| | - Jana Kasparkova
- Institute
of Biophysics, Academy of Sciences of the Czech Republic, v.v.i.,
Kralovopolska 135, CZ-61265 Brno, Czech Republic
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6
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Sinisi M, Gandin V, Saltarella T, Intini FP, Pacifico C, Marzano C, Natile G. Synthesis, characterization, and biological activity of platinum II, III, and IV pivaloamidine complexes. J Biol Inorg Chem 2014; 19:1081-97. [PMID: 24850131 DOI: 10.1007/s00775-014-1146-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2013] [Accepted: 05/03/2014] [Indexed: 11/24/2022]
Abstract
Imino ligands have proven to be able to activate the trans geometry of platinum(II) complexes towards antitumor activity. These ligands, like aromatic N-donor heterocycles, have a planar shape but, different from the latter, have still an H atom on the coordinating nitrogen which can be involved in H-bond formation. Three classes of imino ligands have been extensively investigated: iminoethers (HN=C(R)OR'), ketimines (HN=CRR'), and amidines (HN=C(R)NR'R″). The promising efficacy of the platinum compounds with amidines (activity comparable to that of cisplatin for cis complexes and much greater than that of transplatin for trans complexes) prompted us to extend the investigation to amidine complexes with a bulkier organic residue (R = t-Bu). The tert-butyl group can confer greater affinity for lipophilic environments, thus potentiating the cellular uptake of the compound. In the present study we describe the synthesis and characterization of pivaloamidine complexes of platinum(II), (cis and trans-[PtCl2(NH3){Z-HN=C(t-Bu)NH2}] and cis and trans-[PtCl2{Z-HN=C(t-Bu)NH2}2]), platinum(III) ([Pt2Cl4{HN=C(t-Bu)NH}2(NH3)2]), and platinum(IV) (trans-[PtCl4(NH3){Z-HN=C(t-Bu)NH2}] and trans-[PtCl4{Z-HN=C(t-Bu)NH2}2]). The cytotoxicity of all new Pt complexes was tested toward a panel of cultured cancer cell lines, including cisplatin and multidrug resistant variants. In addition, cellular uptake and DNA binding, perturbations of cell cycle progression, induction of apoptosis, and p53 activation were investigated for the most promising compound trans-[PtCl2(NH3){Z-HN=C(t-Bu)NH2}]. Remarkably, the latter complex was able to overcome both acquired and intrinsic cisplatin resistance.
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Affiliation(s)
- Marilù Sinisi
- Dipartimento di Chimica, University of Bari "Aldo Moro", via E. Orabona 4, 70125, Bari, Italy
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7
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Wilson JJ, Lippard SJ. Synthetic methods for the preparation of platinum anticancer complexes. Chem Rev 2013; 114:4470-95. [PMID: 24283498 DOI: 10.1021/cr4004314] [Citation(s) in RCA: 487] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Justin J Wilson
- Department of Chemistry, Massachusetts Institute of Technology , Cambridge, Massachusetts 02139, United States
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8
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Sgarbossa P, Sbovata SM, Bertani R, Mozzon M, Benetollo F, Marzano C, Gandin V, Michelin RA. Novel imino thioether complexes of platinum(II): synthesis, structural investigation, and biological activity. Inorg Chem 2013; 52:5729-41. [PMID: 23647564 DOI: 10.1021/ic3024452] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The reactions of the nitrile complexes cis- and trans-[PtCl2(NCR)2] (R = Me, Et, CH2Ph, Ph) with an excess of ethanethiol, EtSH, in the presence of a catalytic amount of n-BuLi in tetrahydrofuran (THF), afforded in good yield the bis-imino thioether derivatives cis-[PtCl2{E-N(H)═C(SEt)R}2] (R = Me (1), Et (2), CH2Ph (3), Ph (4)) and trans-[PtCl2{E-N(H)═C(SEt)R}2] (R = Me (5), Et (6), CH2Ph (7), Ph (8)). The imino thioether ligands assumed the E configuration corresponding to a cis addition of the thiol to the nitrile triple bond. The spectroscopic properties of these complexes have been reported along with the molecular structures of 1, 2, and 7 as established by X-ray crystallography which indicated that these compounds exhibit square-planar coordination geometry around the platinum center. Four N-H···Cl intermolecular contacts (N-H···Cl ca. 2.5-2.7 Å) between each chlorine atom and the N-H proton of the imino thioether ligand gave rise to "dimers" Pt2Cl4L4 (L = imino thioether) formed by two PtCl2L2 units. The cytotoxic properties of these new platinum(II) complexes were evaluated against various human cancer cell lines. Among all derivatives, trans-[PtCl2{E-N(H)═C(SEt)CH2Ph}2] showed the greatest in vitro cytotoxic activity being able to decrease cancer cell viability roughly 3-fold more effectively than cisplatin.
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Affiliation(s)
- Paolo Sgarbossa
- Department of Industrial Engineering, University of Padua, Via F. Marzolo, 9, 35131 Padua, Italy
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9
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Gushchin PV, Kuznetsov ML, Haukka M, Kukushkin VY. Recognition of a Novel Type X═N–Hal···Hal (X = C, S, P; Hal = F, Cl, Br, I) Halogen Bonding. J Phys Chem A 2013; 117:2827-34. [DOI: 10.1021/jp3112149] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Pavel V. Gushchin
- Department of Chemistry, Saint Petersburg State University, 198504 Stary Petergof,
Russian Federation
| | - Maxim L. Kuznetsov
- Centro
de Química Estrutural,
Complexo I, Instituto Superior Técnico, Universidade Técnica de Lisboa, Av. Rovisco Pais, 1049-001
Lisbon, Portugal
| | - Matti Haukka
- Department
of Chemistry, University of Jyväskylä, P.O. Box 35,
FI-40014, Jyväskylä, Finland
| | - Vadim Yu. Kukushkin
- Department of Chemistry, Saint Petersburg State University, 198504 Stary Petergof,
Russian Federation
- Institute of Macromolecular Compounds of Russian Academy of Sciences, V. O. Bolshoii
Pr. 31, 199004, Saint Petersburg, Russian Federation
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10
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Platinum(II) complexes containing unsaturated ligands. Nucleophilic substitution versus nucleophilic attack to ligand: a stereochemistry driven outcome. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2012.10.038] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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11
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Michelin RA, Sgarbossa P, Sbovata SM, Gandin V, Marzano C, Bertani R. Chemistry and biological activity of platinum amidine complexes. ChemMedChem 2011; 6:1172-83. [PMID: 21630470 DOI: 10.1002/cmdc.201100150] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Revised: 04/26/2011] [Indexed: 01/06/2023]
Abstract
Platinum amidine complexes represent a new class of potential antitumor drugs that contain the imino moiety HN=C(sp(2)) bonded to the platinum center. They can be related to the iminoether derivatives, which were recently shown to be the first Pt(II) compounds with a trans configuration endowed with anticancer activity. The chemical and biological properties of platinum amidine complexes, and more generally of platinum imino derivatives, can be rationally modified through suitable synthetic procedures with the aim of improving their cytotoxicity and antitumor activity. The addition of protic nucleophiles to nitriles coordinated to platinum in various oxidation states can offer a wide variety of complexes with chemical, structural, and physical properties specifically tuned for a more efficacious biological response.
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Affiliation(s)
- Rino A Michelin
- Department of Chemical Processes of Engineering, Padova University, Via F. Marzolo 9, 35131 Padova, Italy
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12
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Turner DR, Chesman ASR, Murray KS, Deacon GB, Batten SR. The chemistry and complexes of small cyano anions. Chem Commun (Camb) 2011; 47:10189-210. [PMID: 21773626 DOI: 10.1039/c1cc11909e] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- David R Turner
- School of Chemistry, Monash University, Clayton, Vic 3800, Australia.
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13
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Perera T, Fronczek FR, Marzilli PA, Marzilli LG. Superbasic amidine monodentate ligands in fac-[Re(CO)3(5,5'-Me2bipy)(amidine)]BF4 complexes: dependence of amidine configuration on the remote nitrogen substituents. Inorg Chem 2010; 49:7035-45. [PMID: 20593850 DOI: 10.1021/ic100714m] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Addition of various RNH(2) to fac-[Re(CO)(3)(5,5'-Me(2)bipy)(CH(3)CN)]BF(4) (1) converts the acetonitrile ligand to the amidine ligand (a superbase) in fac-[Re(CO)(3)(5,5'-Me(2)bipy)(HNC(CH(3))NHR)]BF(4) products. Each complex has four conceivable isomers (E, E', Z, and Z') because the amidine CN bonds have double-bond character, and the two remote NHR group substituents are different. The reaction of 1 in acetonitrile is complete in 6 to 96 h (25 degrees C) and forms fac-[Re(CO)(3)(5,5'-Me(2)bipy)(HNC(CH(3))NHR)]BF(4) E' and Z isomers. Only the E' isomer formed crystals (R = methyl, isopropyl, isobutyl, tert-butyl, and benzyl). Upon dissolution of such crystals in acetonitrile-d(3), NMR spectra with highly dominant E' signals gradually changed (approximately 15 min at room temperature) to spectra with signals for an equilibrium mixture of E' and Z isomers. Such slow E'-to-Z isomer interchange is also indicated by 2D ROESY NMR data used primarily to assign solution structure. Equilibrium ratios (E':Z) of approximately 65:35 for R = methyl, isopropyl, and isobutyl and 83:17 for R = tert-butyl demonstrate that increasing the remote NHR group steric bulk above a threshold size favors the E' isomer. Consistent with this trend, fac-[Re(CO)(3)(5,5'-Me(2)bipy)(HNC(CH(3))NH(2))]BF(4), with a remote NH(2) (low bulk) group, favors the Z isomer. In contrast, although the remote NH(benzyl) group in fac-[Re(CO)(3)(5,5'-Me(2)bipy)(HNC(CH(3))NH(CH(2)C(6)H(5))]BF(4) has only moderate bulk, the E' isomer has high abundance as a result of favorable 5,5'-Me(2)bipy/benzyl stacking, evidence for which is present in both solid and solution states. The fac-[Re(CO)(3)(5,5'-Me(2)bipy)(HNC(CH(3))NHR)]BF(4) E isomer can be detected in solvents of low polarity. However, the Z' isomer was not observed, undoubtedly because unfavorable remote-group clashes with the equatorial ligands destabilize this isomer. Challenge studies with a 5-fold excess of 4-dimethylaminopyridine in acetonitrile-d(3) establish that fac-[Re(CO)(3)(5,5'-Me(2)bipy)(HNC(CH(3))NHCH(CH(3))(2))]BF(4) is robust because the isopropylamidine ligand was not displaced, consistent with the superbase character of amidine ligands.
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Affiliation(s)
- Theshini Perera
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, USA
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14
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Marzano C, Mazzega Sbovata S, Gandin V, Colavito D, Del Giudice E, Michelin RA, Venzo A, Seraglia R, Benetollo F, Schiavon M, Bertani R. A new class of antitumor trans-amine-amidine-Pt(II) cationic complexes: influence of chemical structure and solvent on in vitro and in vivo tumor cell proliferation. J Med Chem 2010; 53:6210-27. [PMID: 20681543 DOI: 10.1021/jm1006534] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reactions of cyclopropylamine, cyclopentylamine, and cyclohexylamine with trans-[PtCl2(NCMe)2] afforded the bis-cationic complexes trans-[Pt(amine)2(Z-amidine)2]2+[Cl-]2, 1-3. The solution behavior and biological activity have been studied in different solvents (DMSO, water, polyethylene glycol (PEG 400), and polyethylene glycol dimethyl ether (PEG-DME 500)). The biological activity was strongly influenced by the cycloaliphatic amine ring size, with trans-[Pt(NH2CH(CH2)4CH2)2{N(H) horizontal lineC(CH3)N(H)CH(CH2)4CH2}2]2+[Cl-]2 (3) being the most active compound. Complex 3 overcame both cisplatin and MDR resistance, inducing cancer cell death through p53-mediated apoptosis. Alkaline single-cell gel electrophoresis experiments indicated direct DNA damage, reasonably attributable to DNA adducts of trans-[PtCl(amine)(Z-amidine)2][Cl] species, which can evolve to produce disruptive and nonrepairable lesions on DNA, thus leading to the drug-induced programmed cancer cell death. Preliminary in vivo antitumor studies on C57BL mice bearing Lewis lung carcinoma highlighted that complex 3 promoted a significant and dose-dependent tumor growth inhibition without adverse side effects.
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Affiliation(s)
- Cristina Marzano
- Department of Pharmaceutical Sciences, Universy of Padova, Via F. Marzolo 5, I-35131 Padova, Italy
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Bacchi A, Belli Dell’ Amico D, Calderazzo F, Labella L, Pelizzi G, Marchetti F, Samaritani S. Reactions of the homoleptic acetonitrile complexes of palladium and platinum with diethylamine. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.04.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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16
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Bokach NA, Konovalova NP, Wang Y, Moskalenko YE, Gribanov AV, Kukushkin VY. One-end nucleophilic addition of di- and triamines to PtIV-coordinated nitriles as an entry to (amidine)PtIV complexes bearing pendant NH2-groups. Dalton Trans 2010; 39:4619-23. [DOI: 10.1039/c001103g] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Intini FP, Pellicani RZ, Boccarelli A, Sasanelli R, Coluccia M, Natile G. Synthesis, Characterization, and In Vitro Antitumor Activity of New Amidineplatinum(II) Complexes Obtained by Addition of Ammonia to Coordinated Acetonitrile. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800632] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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18
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Tyan MR, Bokach NA, Wang MJ, Haukka M, Kuznetsov ML, Kukushkin VY. Facile cyanamide-ammonia coupling mediated by cis- and trans-[PtIIL2] centers and giving metal-bound guanidines. Dalton Trans 2008:5178-88. [PMID: 18813372 DOI: 10.1039/b806862c] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Diffusion of ammonia into CH(2)Cl(2) solutions of the dialkylcyanamide complexes cis- or trans-[PtCl(2)(RCN)(2)] (R = NMe(2), NEt(2), NC(5)H(10)) at 20-25 degrees C leads to metal-mediated cyanamide-ammonia coupling to furnish, depending on reaction time, one or another type of novel bisguanidine compound, i.e. the molecular cis- or trans-[PtCl(2){NH=C(NH(2))R}(2)] (cis- and trans-) and the cationic cis- or trans-[Pt(NH(3))(2){NH=C(NH(2))R}(2)](Cl)(2) (cis- and trans-) complexes. Compounds cis- or trans- were converted to cis- or trans-, accordingly, upon prolonged treatment with NH(3) in CH(2)Cl(2). The ammination of the relevant nitrile complexes cis- or trans-[PtCl(2)(RCN)(2)] (R = Et, CH(2)Ph, Ph) in CH(2)Cl(2) solutions affords only the cationic compounds cis- or trans-[Pt(NH(3))(2){NH=C(NH(2))R}(2)](Cl)(2) (cis- and trans-). The formulation of was supported by satisfactory C, H and N elemental analyses, agreeable ESI(+)-MS (or FAB(+)-MS), IR, (1)H and (13)C NMR spectroscopies. The structures of trans-, trans-, cis-, trans-, cis-, and cis- were determined by single-crystal X-ray diffraction disclosing structural features and showing that the ammination gives ligated guanidines and amidines in the E- and Z-forms, respectively, where both correspond to the trans-addition of NH(3) to the nitrile species.
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Affiliation(s)
- Marina R Tyan
- Department of Chemistry, St. Petersburg State University, Stary Petergof, Russian Federation
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Sbovata SM, Bettio F, Marzano C, Mozzon M, Bertani R, Benetollo F, Michelin RA. Benzylamidine complexes of platinum(II) derived by nucleophilic addition of primary and secondary amines. X-ray crystal structure of trans-[PtCl2{Z-N(H)C(NHMe)CH2Ph}2]. Inorganica Chim Acta 2008. [DOI: 10.1016/j.ica.2007.10.054] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Deng Y, Liu J, Zhang Q, Li F, Yang Y, Li P, Ma J. Transition metal-induced reductive coupling of 2-amino-1,3,4-thiadiazole with acetonitrile: Synthesis and structural characterization of two Co(III) complexes with amidine. INORG CHEM COMMUN 2008. [DOI: 10.1016/j.inoche.2008.01.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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21
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Mazzega Sbovata S, Bettio F, Marzano C, Tassan A, Mozzon M, Bertani R, Benetollo F, Michelin RA. Synthesis, characterization and cytotoxic activity of substituted benzyl iminoether Pt(II) complexes of the type cis- and trans-[PtCl2{E-N(H)=C(OMe)CH2-C6H4-p-R}2] (R=Me, OMe, F). X-ray structure of trans-[PtCl2{E-N(H)=C(OMe)CH2-C6H4-p-F}2]. J Inorg Biochem 2007; 102:882-91. [PMID: 18267343 DOI: 10.1016/j.jinorgbio.2007.12.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2007] [Revised: 10/26/2007] [Accepted: 12/07/2007] [Indexed: 10/22/2022]
Abstract
New substituted benzyl iminoether derivatives of the type cis- and trans-[PtCl(2){E-N(H)C(OMe)CH(2)-C(6)H(4)-p-R}(2)] (R=Me (1a, 2a), OMe (3a, 4a), F (5a, 6a)) have been synthesized and characterized by elemental analyses, FT-IR spectroscopy and NMR techniques. The iminoether ligands are in the E configuration, which is stable in solution and in the solid state, as confirmed by the (1)H NMR data. Complex trans-[PtCl(2){E-N(H)C(OMe)CH(2)-C(6)H(4)-p-F}(2)] (6a) was also characterized by an X-ray diffraction study. Complexes 1a-6a have been tested against a panel of human tumor cell lines in order to evaluate their cytotoxic activity. cis-Isomers were significant more potent than the corresponding trans-isomers against all tumor cell lines tested; moreover, complexes 1a and 5a showed IC(50) values from about 2-fold to 6-fold lower than those exhibited by cisplatin, used as reference platinum anticancer drug.
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Affiliation(s)
- Silvia Mazzega Sbovata
- Department of Chemical Processes of Engineering, University of Padova, Via F. Marzolo 9, 35131 Padova, Italy.
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22
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Marzano C, Sbovata SM, Bettio F, Michelin RA, Seraglia R, Kiss T, Venzo A, Bertani R. Solution behaviour and biological activity of bisamidine complexes of platinum(II). J Biol Inorg Chem 2007; 12:477-93. [PMID: 17211629 DOI: 10.1007/s00775-006-0202-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2006] [Accepted: 12/03/2006] [Indexed: 11/25/2022]
Abstract
A series of platinum(II) amidine complexes were previously prepared with the aim of obtaining a new class of platinum-based antitumour drugs. This series includes compounds of the type cis--[PtCl2{Z-HN=C(NHMe)Me}2] and trans-[PtCl2{Z-HN=C(NHMe)Me}2] (1, 2), cis-[PtCl2{E-HN=C(NMe2)Me}2] and trans-[PtCl2{E-HN=C(NMe2)Me}2] (3, 4), cis-[PtCl2{Z-HN=C(NHMe)Ph}2] and trans-[PtCl2{Z-HN=C(NHMe)Ph}2] (5, 6), and cis-[PtCl2{HN=C(NMe2)Ph}2] and trans-[PtCl2{HN=C(NMe2)Ph}2] (7, 8). The reactions with dimethyl sulfoxide were studied for complexes 5-8; the formation of cationic species containing coordinated dimethyl sulfoxide was demonstrated by NMR experiments and electrospray ionization mass spectrometry. In this work, the amidine platinum(II) complexes were tested for their in vitro cytotoxicity on a panel of various human cancer cell lines. The results indicate that the benzamidine complex 8 was the most effective derivative also circumventing acquired cisplatin resistance as demonstrated by chemosensitivity tests performed on cisplatin-sensitive and cisplatin-resistant cell lines. The studies concerning the cellular DNA damage on both parental chemosensitive and resistant sublines suggest for the new trans-amidine complex a different mechanism of action compared with that exhibited by cisplatin.
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Affiliation(s)
- C Marzano
- Department of Pharmaceutical Sciences, University of Padova, Via F. Marzolo 5, 35131, Padua, Italy
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23
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Sgarbossa P, Pizzo E, Scarso A, Sbovata SM, Michelin RA, Mozzon M, Strukul G, Benetollo F. Bis-phosphine monoxide platinum(II) and palladium(II) cationic complexes as Lewis acid catalysts in Diels–Alder and sulfoxidation reactions. J Organomet Chem 2006. [DOI: 10.1016/j.jorganchem.2006.05.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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24
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Coles MP. Application of neutral amidines and guanidines in coordination chemistry. Dalton Trans 2006:985-1001. [PMID: 16474883 DOI: 10.1039/b515490a] [Citation(s) in RCA: 336] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The aim of this perspective is to highlight the continued development and application of amidines and guanidines as neutral, N-based donor ligands in coordination chemistry. From a sporadic interest dating back to the 1980s, work on these two closely related classes of compounds has steadily grown, with examples of evermore sophisticated substitution about the common ligand framework being developed to address specific problems in a number of fields of chemistry. These compounds have shown varied coordination modes at metals from across the periodic table, and examples of their application in a number of catalytic processes are emerging as the field matures.
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Affiliation(s)
- Martyn P Coles
- Department of Chemistry, University of Sussex, Falmer, Brighton, UKBN1 9QJ.
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Braunstein P. Bonding and Organic and Inorganic Reactivity of Metal-Coordinated Phosphinoenolates and Related Functional Phosphine-Derived Anions. Chem Rev 2005; 106:134-59. [PMID: 16402774 DOI: 10.1021/cr050993p] [Citation(s) in RCA: 117] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pierre Braunstein
- Laboratoire de Chimie de Coordination, Institut de Chimie, UMR 7177 CNRS, Université Louis Pasteur, 4 rue Blaise Pascal, F-67070 Strasbourg Cédex, France.
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26
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Bach SBH, Sepeda TG, Merrill GN, Walmsley JA. Complexes of dibromo(ethylenediamine)-palladium(II) observed from aqueous solutions by electrospray mass spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2005; 16:1461-1469. [PMID: 16024254 DOI: 10.1016/j.jasms.2005.04.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2004] [Revised: 04/13/2005] [Accepted: 04/16/2005] [Indexed: 05/03/2023]
Abstract
The dimeric complex of dibromo(ethylenediamine)palladium(II) observed in water was investigated using electrospray mass spectrometry. One microM aqueous solutions of Pd(en)Br2 yielded a variety of previously unreported species. The most abundant ion observed was attributable to the Pd(en)Br2.Pd(en)Br+ dimeric complex at m/z 568.7 (most abundant stable isotopes). The characteristics of the oligomeric complexes were examined using collision-induced dissociation (CID) up to MS6. The most common loss mechanism observed was loss of HBr leaving an unsaturated Pd(II) center. Fragmentation of the ethylenediamine ligand was also observed during CID experiments. Loss of Pd was only observed as the final step in the CID process when other loss mechanisms had been exhausted. A number of calculations were carried out at the B3-LYP/SBKJC[d] level of theory in an attempt to elucidate the structure of the [2M-Br]+ dimer.
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Affiliation(s)
- Stephan B H Bach
- Department of Chemistry, The University of Texas at San Antonio, 6900 North Loop 1604 West, 78249-0698, San Antonio, TX, USA.
| | - Tiffanee G Sepeda
- Department of Chemistry, The University of Texas at San Antonio, 6900 North Loop 1604 West, 78249-0698, San Antonio, TX, USA
| | - Grant N Merrill
- Department of Chemistry, The University of Texas at San Antonio, 6900 North Loop 1604 West, 78249-0698, San Antonio, TX, USA
| | - Judith A Walmsley
- Department of Chemistry, The University of Texas at San Antonio, 6900 North Loop 1604 West, 78249-0698, San Antonio, TX, USA
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Synthesis and characterisation of the amidine complexes trans-[PtCl(NH3){HNC(NH2)R}2]Cl (R=Me, Ph, CH2Ph) derived from addition of NH3 to the coordinated nitriles in trans-[PtCl2(NCR)2]. J Organomet Chem 2005. [DOI: 10.1016/j.jorganchem.2005.01.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Electrospray mass spectrometry of Pt(II) amidine complexes of the type cis- and trans-[PtCl2{NHC(R)NR′R″}2] and trans-[PtCl2(RCN){NHC(R)NR′R″}]. Inorganica Chim Acta 2003. [DOI: 10.1016/s0020-1693(03)00489-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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29
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Makarycheva-Mikhailova AV, Kukushkin VY, Nazarov AA, Garnovskii DA, Pombeiro AJL, Haukka M, Keppler BK, Galanski MS. Amidines derived from Pt(IV)-mediated nitrile-amino alcohol coupling and their Zn(II)-catalyzed conversion into oxazolines. Inorg Chem 2003; 42:2805-13. [PMID: 12691592 DOI: 10.1021/ic034070t] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The reaction between the platinum(IV) complex trans-[PtCl(4)(EtCN)(2)] and the amino alcohols NH(2)CH(2)CH(2)OH, NH(2)CH(2)CH(Me)OH-(R)-(-), NH(2)CH(Ph)CH(2)OH-(R)-(-), NH(2)CH(Et)CH(2)OH-(R)-(-), NH(2)CH(Et)CH(2)OH-(S)-(+), and NH(2)CH(Pr(n)())CH(2)OH proceeds rapidly at room temperature in CH(2)Cl(2) to furnish the amidine complexes [PtCl(4)(HN=C(Et)NH(arcraise;)OH)(2)] (1-6) in good yield (70-80%). The related reaction between the platinum(II) complex trans-[PtCl(2)(EtCN)(2)] and monoethanolamine in a molar ratio of 1:2 in CH(2)Cl(2) results in the addition of 4 equiv of NH(2)CH(2)CH(2)OH per mole of complex to give [Pt(HN=C(Et)NHCH(2)CH(2)OH)(2)(NH(2)CH(2)CH(2)OH)(2)](2+) (7). Formulation of 1-6 is based upon satisfactory C, H, N elemental analyses, electrospray mass spectrometry, IR spectroscopy, and (1)H, (13)C((1)H), (15)N, and (195)Pt NMR spectroscopies, while the structures of trans-[PtCl(4)((Z)-NH=C(Et)NHCH(2)CH(2)OH)(2)] (1), trans-[PtCl(4)((Z)-NH=C(Et)NHCH(2)CH(Me)OH-(R)-(-))(2)] (2), and trans-[PtCl(4)((Z)-NH=C(Et)NHCH(Et)CH(2)OH-(R)-(-))(2)] (4) were determined by X-ray single-crystal diffraction. The Z-amidine configuration of the ligands is preserved in CDCl(3) solutions as confirmed by gradient-enhanced (15)N,(1)H-HMQC spectroscopy and NOE experiments. The amidines, formed upon Pt(IV)-mediated nitrile-amino alcohol coupling, were liberated from their platinum(IV) complexes 1, 3, and 4 by reaction with Ph(2)PCH(2)CH(2)PPh(2) (dppe) giving free NH=C(Et)NHCHRCH(2)OH (R = H 8, Et 9, Ph 10), with the substituents R of different types, and dppe oxides; the P-containing species were identified by (31)P((1)H) NMR spectroscopy. NOESY spectroscopy indicates that the liberated amidines retained the same configuration relative to the C=N double bond, i.e., syn-(H,Et)-NH=C(Et)NHCHRCH(2)OH. The liberated hydroxo-functionalized amidines 8-10 were converted into oxazolines (11-13) in the presence of a catalytic amount of ZnCl(2). A similar catalytic effect has also been reached using anhydrous MSO(4) (M = Cu, Co, Cd), CdCl(2), and AlCl(3).
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Affiliation(s)
- Anastassiya V Makarycheva-Mikhailova
- Department of Chemistry, St. Petersburg State University, 198504 Stary Petergof, Russian Federation, Institute for Inorganic Chemistry, University of Vienna, Währinger Strasse 42, A-1090 Vienna, Austria
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Craven E, Abu-Shandi K, Janiak C. Correlation between Solution and the Solid State: The pH Dependent Composition in the Ternary System [Co(H2O)6]2+ or [Ni(H2O)6]2+/Piperazine/Phosphate. Z Anorg Allg Chem 2003. [DOI: 10.1002/zaac.200390031] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Makarycheva-Mikhailova AV, Bokach NA, Kukushkin VY, Kelly PF, Gilby LM, Kuznetsov ML, Holmes KE, Haukka M, Parr J, Stonehouse JM, Elsegood MRJ, Pombeiro AJL. Platinum(IV)-mediated nitrile-sulfimide coupling: a route to heterodiazadienes. Inorg Chem 2003; 42:301-11. [PMID: 12693210 DOI: 10.1021/ic025960w] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Pt(IV)-mediated addition of the sulfimide Ph2S = NH and the mixed sulfide/sulfimides o- and p-[PhS(=NH)](PhS)-C6H4 by the S=NH group to the metal-bound nitriles in the platinum(IV) complexes [PtCl4(RCN)2] proceeds smoothly at room temperature in CH2Cl2 and results in the formation of the heterodiazadiene compounds [PtCl4[NH=C(R)N=SR'Ph]2] (R' = Ph, R = Me, Et, CH2Ph, Ph; R' = o- and p-(PhS)C6H4; R = Et). While trans-[PtCl4(RCN)2] (R = Et, CH2Ph, Ph) reacting with Ph2S=NH leads exclusively to trans-[PtCl4[NH=C(R)N=SPh2]2], cis/trans-[PtCl4(MeCN)2] leads to cis/trans mixtures of [PtCl4[NH=C(Me)N=SPh2]2] and the latter have been separated by column chromatography. Theoretical calculations at both HF/HF and MP2//HF levels for the cis and trans isomers of [PtCl4[NH=C(Me)N=SMe2]2] indicate a higher stability for the latter. Compounds trans-[PtCl4[E-NH=C(R)N=SPh2]2] (R = Me, Et) and cis-[PtCl4[E-NH=C(Me)N=SPh2][Z-NH=C(Me)N=SPh2]] have been characterized by X-ray crystallography. The complexes [PtCl4[NH=C(R)N=SPh2]2] undergo hydrolysis when treated with HCl in nondried CH2Cl2 to achieve the amidines [PtCl4[NH=C(NH2)R]2] the compound with R = Et has been structurally characterized) and Ph2SO. The heterodiazadiene ligands, formed upon Pt(IV)-mediated RCN/sulfimide coupling, can be liberated from their platinum(IV) complexes [PtCl4[NH=C(R)N=SR'Ph]2] by reaction with Ph2PCH2CH2PPh2 (dppe) giving free NH=C(R)=SR'Ph and the dppe oxides, which constitutes a novel route for such rare types of heterodiazadienes whose number has also been extended. The hybrid sulfide/sulfimide species o- and p-[PhS(=NH)](PhS)C6H4 also react with the Pt(II) nitrile complex [PtCl2(MeCN)2] but the coupling--in contrast to the Pt(IV) species--gives the chelates [PtCl2[M-I=C(Me)N=S(Ph)C6H4SPh]]. The X-ray crystal structure of [PtCl2[M-I=C(Me)N=S(Ph)C6H4SPh-o]] reveals the bond parameters within the metallacycle and shows an unusual close interaction of the sulfide sulfur atom with the platinum.
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Affiliation(s)
- Vadim Yu Kukushkin
- Department of Chemistry, St. Petersburg State University, 198504 Stary Petergof, Russian Federation.
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Belluco U, Benetollo F, Bertani R, Bombieri G, Michelin RA, Mozzon M, Tonon O, Pombeiro AJ, Guedes da Silva FC. Addition reactions of primary and secondary aliphatic amines to the benzonitrile ligands in cis- and trans-[PtCl2(NCPh)2] complexes. X-ray structure of the amidine complex trans-[PtCl2{Z-N(H)C(NHBut)Ph}2]. Inorganica Chim Acta 2002. [DOI: 10.1016/s0020-1693(02)00866-6] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Stereochemical investigation of the addition of primary and secondary aliphatic amines to the nitrile complexes cis- and trans-[PtCl2(NCMe)2]. X-ray structures of the amidine complexes trans-[Pt(NH2Pri)2{ZN(H)C(NHPri)Me}]Cl2·4H2O and trans-[PtCl2(NCMe){EN(H)C(NMeBut)Me}]. Inorganica Chim Acta 2002. [DOI: 10.1016/s0020-1693(01)00803-9] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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