The Pt(II) ion in the title complex, [PtI(2)(C(14)H(10)N(4))], exists in a distorted square-planar environment defined by the two pyridine N atoms of the chelating 2,3-di-2-pyridyl-pyrazine ligand and two iodide anions. The pyridine rings are inclined to the least-squares plane of the PtI(2)N(2) unit [maximum deviation = 0.070 (3) Å] at 66.1 (2) and 65.9 (2)°; the pyrazine ring is perpendicular to this plane [dihedral angle = 89.7 (2)°]. Two inter-molecular C-H⋯I hydrogen bonds, both involving the same I atom as hydrogen-bond acceptor, generate a layer structure extending parallel to (001). Mol-ecules are stacked in columns along the a axis. Along the b axis, successive mol-ecules stack in opposite directions.
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http://dx.doi.org/10.1107/S1600536812023501 | DOI Listing |
Dalton Trans
January 2025
Institute of Biopharmaceutical Research, Liaocheng University, Liaocheng 252059, P. R. China.
Pt(IV) complexes as prodrugs of Pt(II) drugs exhibit numerous advantages such as enhanced stability, reduced toxicity, increased oral bioavailability, and efficacy in overcoming the drug resistance of Pt(II) compounds, which underscore their significant potential in the advancement of novel Pt anticancer agents. Furthermore, protective autophagy is pivotal in sustaining tumor cell homeostasis and modulating the tumor microenvironment (TME), thereby representing a critical target for the development of antitumor drugs. Specific inhibition or activation of autophagy during chemotherapy would break the internal homeostasis in the TME and increase antitumor activities.
View Article and Find Full Text PDFChemistry
January 2025
The University of British Columbia, Department of Chemistry, 2036 Main Mall, V6T 1Z1, Vancouver, CANADA.
The field of platinum chemistry is ubiquitous in the research of anticancer drugs and new OLED materials. Within the vast library of existing compounds, the majority of work focuses on complexes in the +2 and +4 oxidation states, with comparatively few examples of PtIII complexes reported without bridging ligands. PtIII complexes with metal-metal bonding can be made by mild oxidation of PtII complexes having bis(phenylpyridine) ligands.
View Article and Find Full Text PDFJ Med Chem
January 2025
Institute for Drug Research, School of Pharmacy, The Hebrew University of Jerusalem, Jerusalem 9112102, Israel.
Cisplatin and oxaliplatin are Pt(II) anticancer agents that are used to treat several cancers, usually in combination with other drugs. Their efficacy is diminished by dose-limiting peripheral neuropathy (PN) that affects ∼70% of patients. PN is caused by selective accumulation of the platinum drugs in the dorsal root ganglia (DRG), which overexpress transporters for cisplatin and oxaliplatin.
View Article and Find Full Text PDFDalton Trans
January 2025
Department of Chemistry, Babeş-Bolyai University, Str. Arany Janos Nr. 11, RO-400028 Cluj-Napoca, Romania.
The synthesis and characterization of novel platinum(II) and platinum(IV) complexes derived from unsymmetrical ethylene or propylenediamine derivatives are presented. IR spectroscopy and ESI mass spectrometry techniques were employed to characterize the complexes, revealing distinctive absorption bands and isotope patterns. Furthermore, the complexes were characterized by H and C NMR spectroscopy.
View Article and Find Full Text PDFDalton Trans
January 2025
Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMUB), UMR 6302 CNRS, Université de Bourgogne, 9 Avenue Alain Savary, BP 47870, 21078 Dijon Cedex, France.
Water-soluble porphyrins have garnered significant attention due to their broad range of applications in biomedicine, catalysis, and material chemistry. In this work, water-soluble platinum(II) and palladium(II) complexes with porphyrins bearing ethyl phosphonate substituents, namely, Pt/Pd 10-(ethoxyhydroxyphosphoryl)-5,15-di(-carboxyphenyl)porphyrins (M3m, M = Pt(II), Pd(II)) and Pt/Pd 5,10-bis(ethoxyhydroxyphosphoryl)-10,20-diarylporphyrins (M1d-M3d; aryl = -tolyl (1), mesityl (2), -carboxyphenyl (3)), were synthesized by alkaline hydrolysis of the corresponding diethyl phosphonates M6m and M4d-M6d. NMR, UV-vis, and fluorescence spectroscopy revealed that the mono-phosphonates M3m tend to form aggregates in aqueous media, while the bis-phosphonates M3d exist predominantly as monomeric species across a wide range of concentrations (10-10 M), ionic strengths (0-0.
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