1
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Ghosh M, Parvin N, Panwaria P, Tothadi S, Bakthavatsalam R, Therambram A, Khan S. Diverse structural reactivity patterns of a POCOP ligand with coinage metals. Dalton Trans 2024; 53:7763-7774. [PMID: 38619861 DOI: 10.1039/d3dt03921h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
We have utilised the 4,6-di-tert-butyl resorcinol bis(diphenylphosphinite) (POCOP) ligand for exploring its coordination ability towards group 11 metal centres. The treatment of the bidentate ligand 1 with various coinage metal precursors afforded a wide range of structurally diverse complexes 2-12, depending upon the metal precursors used. This furnishes several multinuclear Cu(I) complexes with dimeric (2) and tetrameric cores (3, 4, and 5). The tetrameric stairstep complex 4 shows thermochromic behaviour, whereas the dimeric complex 2 and tetrameric complex 3 show luminescence properties at cryogenic temperatures. Interestingly, the halide substitution reaction of the dimeric complex 2 with KPPh2 produces a unique mixed phosphine-based tetrameric Cu(I) complex, 5. Treatment of the POCOP ligand with [CuBF4(CH3CN)4] in the presence of 2,2'-bipyridine afforded heteroleptic complex 6, consisting of tri- and tetra-coordinated cationic Cu(I) centres. Furthermore, we could also isolate cubane (8) and stairstep (9) complexes of Ag(I). The cationic Au(I) complex (12) was obtained from the dinuclear Au(I) complex of POCOP, 11. Complex 12 revealed the presence of a strong intramolecular aurophilic interaction with an Au⋯Au bond distance of 3.1143(9) Å. Subsequently, the photophysical properties of these complexes have been studied. All the complexes were characterised by single-crystal X-ray diffraction studies, routine NMR techniques, and mass spectroscopy.
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Affiliation(s)
- Moushakhi Ghosh
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.
| | - Nasrina Parvin
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.
| | - Prakash Panwaria
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.
| | - Srinu Tothadi
- CSIR-Central Salt and Marine Chemicals Research Institute, Gijub Badheka Marg, Bhavnagar 364002, India
| | - Rangarajan Bakthavatsalam
- Department of Chemistry, Indian Institute of Science Education and Research Tirupati, Srinivasapuram-Jangalapalli Village, Tirupati 517619, India
| | - Arshad Therambram
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.
| | - Shabana Khan
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune 411008, India.
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2
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Smoleński P, Śliwińska-Hill U, Kwiecień A, Wolińska J, Poradowski D. Design, Synthesis, and Anti-Cancer Evaluation of Novel Water-Soluble Copper(I) Complexes Bearing Terpyridine and PTA Ligands. Molecules 2024; 29:945. [PMID: 38474457 DOI: 10.3390/molecules29050945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2023] [Revised: 01/24/2024] [Accepted: 02/15/2024] [Indexed: 03/14/2024] Open
Abstract
This study presents a simple and energy-efficient self-assembly LAG synthetic method for novel water-soluble copper(I) complexes [Cu(terpy)(PTA)][PF6] (1) and [Cu(terpy)(PTA)2][PF6] (2). They were characterized by FT-IR, 1H, and 31P{1H} NMR spectroscopy, elemental analysis, and single-crystal/powder X-ray diffraction (for 2). The X-ray analysis of compound 2 indicates a bidentate coordination mode of terpyridine to the metal center. Variable-temperature NMR tests indicate dynamic properties for terpyridine in the case of both compounds, as well as for the PTA ligands in the case of 2. Additionally, compounds 1 and 2 exhibit interesting cytotoxic activity, which was tested on normal human dermal fibroblasts (NHDFs), human lung carcinoma (A549), human breast adenocarcinoma (MCF-7), and human cervix carcinoma (HeLa) established cell lines. In comparison to the other tested compounds, complexes 1 and 2 seem to have significantly lower IC50 values against cancer cells (A549, HeLa, MCF-7), indicating their potential as prospective anticancer agents. Moreover, both compounds show no significant toxicity towards normal skin cells (NHDFs), suggesting a certain selectivity in their action on cancer cells. Cisplatin as a reference compound also exhibited considerable cytotoxicity against cancer cells but with a low level of selectivity, which could lead to unwanted effects on normal cells. Remarkably, compounds 1 and 2 exhibit up to 30 times the cytotoxic activity of cisplatin, with a six-fold lower toxicity to normal cells. They also interact strongly with human serum albumin, suggesting potential therapeutic applications. Overall, these compounds hold significant promise as potential chemotherapeutic agents.
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Affiliation(s)
- Piotr Smoleński
- Faculty of Chemistry, University of Wrocław, F. Joliot-Curie 14, 50-383 Wrocław, Poland
| | - Urszula Śliwińska-Hill
- Department of Basic Chemical Sciences, Faculty of Pharmacy, Wrocław Medical University, Borowska 211a, 50-556 Wrocław, Poland
| | - Anna Kwiecień
- Department of Basic Chemical Sciences, Faculty of Pharmacy, Wrocław Medical University, Borowska 211a, 50-556 Wrocław, Poland
| | - Joanna Wolińska
- Department of Biostructure and Animal Physiology, Faculty of Veterinary Medicine, Wrocław University of Environmental and Life Sciences, Kożuchowska 1, 51-631 Wrocław, Poland
| | - Dominik Poradowski
- Department of Biostructure and Animal Physiology, Faculty of Veterinary Medicine, Wrocław University of Environmental and Life Sciences, Kożuchowska 1, 51-631 Wrocław, Poland
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3
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Shiryaev VA, Sokolova IV, Gorbachova AM, Rybakov VB, Shiryaev AK, Klimochkin YN. Convenient synthesis of endo,endo- and endo,exo-bicyclo[3.3.1]nonane diamines. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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4
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Alguacil A, Scalambra F, Romerosa A. Insights into the κ-P,N Coordination of 1,3,5-Triaza-7-phosphaadamantane and Derivatives: κ-P,N-Heterometallic Complexes and a 15N Nuclear Magnetic Resonance Survey. Inorg Chem 2022; 61:5779-5791. [PMID: 35378037 PMCID: PMC9019812 DOI: 10.1021/acs.inorgchem.1c03831] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
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Complexes {[(PTA)2CpRu-μ-CN-1κC:2κ2N-RuCp(PTA)2-ZnCl3]}·2DMSO (13) {[ZnCl2(H2O)]-(PTA-1κP:2κ2N)(PTA)CpRu-μ-CN-1κC:2κ2N-RuCp(PTA)(PTA-1κP:2κ2N)-[ZnCl2(H2O)]}Cl (14), [RuCp(HdmoPTA)(PPh3)(PTA)](CF3SO3)2 (20), [RuCp(HdmoPTA)(HPTA)(PPh3)](CF3SO3)3 (21), and [RuCp(dmoPTA)(PPh3)(PTA)](CF3SO3) (22) were obtained
and characterized, and their crystal structure together with that
of the previously published complex 18 is reported. The
behavior of the 1,3,5-triaza-7-phosphatricyclo[3.3.1.13,7]decane (PTA)
and 3,7-dimethyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane (dmoPTA)
ligands against protonation and κN-coordination
is discussed, on the basis of 15N nuclear magnetic resonance
data collected on 22 different compounds, including PTA (1), HdmoPTA (7H), and some common derivatives as free
ligands (2–6 and 8), along with mono-
and polymetallic complexes containing PTA and/or HdmoPTA (9–22). 15N detection via 1H–15N heteronuclear multiple bond correlation allowed the construction
of a small library of 15N chemical shifts that shed light
on important features regarding κN-coordination
in PTA and its derivatives. To shed light
on the behavior of the triazaphosphines 1,3,5-triaza-7-phosphatricyclo[3.3.1.13,7]decane
(PTA) and 3,7-dimethyl-1,3,7-triaza-5-phosphabicyclo[3.3.1]nonane
(dmoPTA) upon κN coordination and N protonation, the 15N chemical shifts of 22 compounds, including PTA and a representative
variety of its derivatives, piano-stool complexes, were collected
by 1H−15N heteronuclear multiple bond
correlation nuclear magnetic resonance. New heterometallic complexes
containing PTA were also synthesized and fully characterized.
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Affiliation(s)
- Andrés Alguacil
- Área de Química Inorgánica-CIESOL, Universidad de Almería, 04120 Almería, Spain
| | - Franco Scalambra
- Área de Química Inorgánica-CIESOL, Universidad de Almería, 04120 Almería, Spain
| | - Antonio Romerosa
- Área de Química Inorgánica-CIESOL, Universidad de Almería, 04120 Almería, Spain
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5
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Feng J, Wang RS, Wang YL, Lei YZ. Cu(II) and Zn(II) complexes incorporated with active analogue fragments molecule of the aristolochic acid: Crystal structure and biological activity. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132172] [Citation(s) in RCA: 2] [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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6
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O'Beirne C, Piatek ME, Fossen J, Müller-Bunz H, Andes DR, Kavanagh K, Patil SA, Baumann M, Tacke M. Continuous flow synthesis and antimicrobial evaluation of NHC* silver carboxylate derivatives of SBC3 in vitro and in vivo. Metallomics 2020; 13:6055688. [PMID: 33595656 DOI: 10.1093/mtomcs/mfaa011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 12/24/2020] [Indexed: 11/14/2022]
Abstract
N-heterocyclic silver carbene compounds have been extensively studied and shown to be active agents against a host of pathogenic bacteria and fungi. By incorporating hypothesized virulence targeting substituents into NHC-silver systems via salt metathesis, an atom-efficient complexation process can be used to develop new complexes to target the passive and active systems of a microbial cell. The incorporation of fatty acids and an FtsZ inhibitor have been achieved, and creation of both the intermediate salt and subsequent silver complex has been streamlined into a continuous flow process. Biological evaluation was conducted with in vitro toxicology assays showing these novel complexes had excellent inhibition against Gram-negative strains E. coli, P. aeruginosa, and K. pneumoniae; further studies also confirmed the ability to inhibit biofilm formation in methicillin-resistant Staphylococcus aureus (MRSA) and C. Parapsilosis. In vivo testing using a murine thigh infection model showed promising inhibition of MRSA for the lead compound SBC3, which is derived from 1,3-dibenzyl-4,5-diphenylimidazol-2-ylidene (NHC*).
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Affiliation(s)
- Cillian O'Beirne
- School of Chemistry, University College Dublin, Belfield, Stillorgan, Dublin 4, Republic of Ireland
| | - Magdalena E Piatek
- SSPC Pharma Research Centre, Department of Biology, Maynooth University, Maynooth, W23F2H6 Co. Kildare, Republic of Ireland
| | - Jen Fossen
- Department of Medicine, University of Wisconsin, 600 Highland Avenue, Madison, WI, USA
| | - Helge Müller-Bunz
- School of Chemistry, University College Dublin, Belfield, Stillorgan, Dublin 4, Republic of Ireland
| | - David R Andes
- Department of Medicine, University of Wisconsin, 600 Highland Avenue, Madison, WI, USA
| | - Kevin Kavanagh
- SSPC Pharma Research Centre, Department of Biology, Maynooth University, Maynooth, W23F2H6 Co. Kildare, Republic of Ireland
| | - Siddappa A Patil
- Centre for Nano and Material Sciences, Jain University, Bangalore, Karnataka, India
| | - Marcus Baumann
- School of Chemistry, University College Dublin, Belfield, Stillorgan, Dublin 4, Republic of Ireland
| | - Matthias Tacke
- School of Chemistry, University College Dublin, Belfield, Stillorgan, Dublin 4, Republic of Ireland
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7
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Almeida Furquim de Camargo B, Soares Silva DE, Noronha da Silva A, Campos DL, Machado Ribeiro TR, Mieli MJ, Borges Teixeira Zanatta M, Bento da Silva P, Pavan FR, Gallina Moreira C, Resende FA, Menegário AA, Chorilli M, Vieira de Godoy Netto A, Bauab TM. New Silver(I) Coordination Compound Loaded into Polymeric Nanoparticles as a Strategy to Improve In Vitro Anti-Helicobacter pylori Activity. Mol Pharm 2020; 17:2287-2298. [DOI: 10.1021/acs.molpharmaceut.9b01264] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | | | - Anderson Noronha da Silva
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, São Paulo, Brazil
| | - Débora Leite Campos
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, São Paulo, Brazil
| | | | - Maria Júlia Mieli
- Department of Biological Sciences and Health, University of Araraquara, Araraquara 14801-340, São Paulo, Brazil
| | | | - Patrícia Bento da Silva
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, São Paulo, Brazil
| | - Fernando Rogerio Pavan
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, São Paulo, Brazil
| | - Cristiano Gallina Moreira
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, São Paulo, Brazil
| | - Flávia Aparecida Resende
- Department of Biological Sciences and Health, University of Araraquara, Araraquara 14801-340, São Paulo, Brazil
| | - Amauri Antônio Menegário
- Environmental Studies Center, São Paulo State University (UNESP), Rio Claro 13506-900, São Paulo, Brazil
| | - Marlus Chorilli
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, São Paulo, Brazil
| | | | - Taís Maria Bauab
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14800-903, São Paulo, Brazil
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8
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Moiseev DV, James BR. Syntheses and rearrangements of tris(hydroxymethyl)phosphine and tetrakis(hydroxymethyl)phosphonium salts. PHOSPHORUS SULFUR 2020. [DOI: 10.1080/10426507.2020.1764957] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
| | - Brian R. James
- Department of Chemistry, University of British Columbia, Vancouver, British Columbia, Canada
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9
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Hajji L, Saraiba-Bello C, Segovia-Torrente G, Scalambra F, Romerosa A. CpRu Complexes Containing Water Soluble Phosphane PTA and Natural Purines Adenine, Guanine and Theophylline: Synthesis, Characterization, and Antiproliferative Properties. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900677] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Lazhar Hajji
- Área de Química Inorgánica-CIESOL; Universidad de Almería; Carretera Sacramento s/n 40120 Almería Spain
| | - Cristobal Saraiba-Bello
- Área de Química Inorgánica-CIESOL; Universidad de Almería; Carretera Sacramento s/n 40120 Almería Spain
| | - Gaspar Segovia-Torrente
- Área de Química Inorgánica-CIESOL; Universidad de Almería; Carretera Sacramento s/n 40120 Almería Spain
| | - Franco Scalambra
- Área de Química Inorgánica-CIESOL; Universidad de Almería; Carretera Sacramento s/n 40120 Almería Spain
| | - Antonio Romerosa
- Área de Química Inorgánica-CIESOL; Universidad de Almería; Carretera Sacramento s/n 40120 Almería Spain
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10
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van Hilst QVC, Vasdev RAS, Preston D, Findlay JA, Scottwell SØ, Giles GI, Brooks HJL, Crowley JD. Synthesis, Characterisation and Antimicrobial Studies of some 2,6‐
bis
(1,2,3‐Triazol‐4‐yl)Pyridine Ruthenium(II) “Click” Complexes. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900088] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Quinn V. C. van Hilst
- Department of ChemistryUniversity of Otago PO Box 56 Dunedin 9054
- Department of Pathology Dunedin School of MedicineUniversity of Otago PO Box 56 Dunedin 9054
- MacDiarmid Institute for Advanced Materials and Nanotechnology New Zealand
| | - Roan A. S. Vasdev
- Department of ChemistryUniversity of Otago PO Box 56 Dunedin 9054
- Department of Pharmacology and ToxicologyUniversity of Otago PO Box 56 Dunedin 9054 New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology New Zealand
| | - Dan Preston
- Department of ChemistryUniversity of Otago PO Box 56 Dunedin 9054
- Department of Pharmacology and ToxicologyUniversity of Otago PO Box 56 Dunedin 9054 New Zealand
- Department of Pathology Dunedin School of MedicineUniversity of Otago PO Box 56 Dunedin 9054
- MacDiarmid Institute for Advanced Materials and Nanotechnology New Zealand
| | - James A. Findlay
- Department of ChemistryUniversity of Otago PO Box 56 Dunedin 9054
- MacDiarmid Institute for Advanced Materials and Nanotechnology New Zealand
| | - Synøve Ø. Scottwell
- Department of ChemistryUniversity of Otago PO Box 56 Dunedin 9054
- Department of Pathology Dunedin School of MedicineUniversity of Otago PO Box 56 Dunedin 9054
| | - Gregory I. Giles
- Department of Pharmacology and ToxicologyUniversity of Otago PO Box 56 Dunedin 9054 New Zealand
| | - Heather J. L. Brooks
- Department of Pathology Dunedin School of MedicineUniversity of Otago PO Box 56 Dunedin 9054
| | - James D. Crowley
- Department of ChemistryUniversity of Otago PO Box 56 Dunedin 9054
- MacDiarmid Institute for Advanced Materials and Nanotechnology New Zealand
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11
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Scalambra F, Lorenzo‐Luis P, de los Ríos I, Romerosa A. New Findings in Metal Complexes with Antiproliferative Activity Containing 1,3,5‐Triaza‐7‐phosphaadamantane (PTA) and Derivative Ligands. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801426] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Franco Scalambra
- Área de Química Inorgánica‐CIESOL. Universidad de Almería Carretera Sacramento s/n Almería Spain
| | - Pablo Lorenzo‐Luis
- Sección Química Inorgánica, Departamento de Química Universidad de La Laguna. C/Astrofísico Francisco Sánchez 2 38206 La Laguna (ULL) Spain
| | - Isaac de los Ríos
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica Facultad de Ciencias Universidad de Cádiz 11510 Puerto Real (Cádiz) Spain
| | - Antonio Romerosa
- Área de Química Inorgánica‐CIESOL. Universidad de Almería Carretera Sacramento s/n Almería Spain
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12
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Tan YJ, Tan YS, Yeo CI, Chew J, Tiekink ERT. In vitro anti-bacterial and time kill evaluation of binuclear tricyclohexylphosphanesilver(I) dithiocarbamates, {Cy 3PAg(S 2CNRR')} 2. J Inorg Biochem 2019; 192:107-118. [PMID: 30640150 DOI: 10.1016/j.jinorgbio.2018.12.017] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 12/27/2018] [Accepted: 12/30/2018] [Indexed: 12/31/2022]
Abstract
Four binuclear phosphanesilver(I) dithiocarbamates, {cyclohexyl3PAg(S2CNRR')}2 for R = R' = Et (1), CH2CH2 (2), CH2CH2OH (3) and R = Me, R' = CH2CH2OH (4) have been synthesised and characterised by spectroscopy and crystallography, and feature tri-connective, μ2-bridging dithiocarbamate ligands and distorted tetrahedral geometries based on PS3 donor sets. The compounds were evaluated for anti-bacterial activity against a total of 12 clinically important pathogens. Based on minimum inhibitory concentration (MIC) and cell viability tests (human embryonic kidney cells, HEK 293), 1-4 are specifically active against Gram-positive bacteria while demonstrating low toxicity; 3 and 4 are active against methicillin resistant S. aureus (MRSA). Across the series, 4 was most effective and was more active than the standard anti-biotic chloramphenicol. Time kill assays reveal 1-4 to exhibit both time- and concentration-dependent pharmacokinetics against susceptible bacteria. Compound 4 demonstrates rapid (within 2 h) bactericidal activity at 1 and 2 × MIC to reach a maximum decrease of 5.2 log10 CFU/mL against S. aureus (MRSA).
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Affiliation(s)
- Yi Jiun Tan
- Research Centre for Crystalline Materials, School of Science and Technology, Sunway University, No. 5 Jalan Universiti, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia; Department of Biological Sciences, School of Science and Technology, Sunway University, No. 5 Jalan Universiti, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - Yee Seng Tan
- Research Centre for Crystalline Materials, School of Science and Technology, Sunway University, No. 5 Jalan Universiti, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - Chien Ing Yeo
- Research Centre for Crystalline Materials, School of Science and Technology, Sunway University, No. 5 Jalan Universiti, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia
| | - Jactty Chew
- Department of Biological Sciences, School of Science and Technology, Sunway University, No. 5 Jalan Universiti, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia.
| | - Edward R T Tiekink
- Research Centre for Crystalline Materials, School of Science and Technology, Sunway University, No. 5 Jalan Universiti, 47500 Bandar Sunway, Selangor Darul Ehsan, Malaysia.
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