1
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Song H, Kostrhunova H, Cervinka J, Macpherson J, Malina J, Rajan T, Phillips R, Postings M, Shepherd S, Zhang X, Brabec V, Rogers NJ, Scott P. Dicobalt(ii) helices kill colon cancer cells via enantiomer-specific mechanisms; DNA damage or microtubule disruption. Chem Sci 2024; 15:11029-11037. [PMID: 39027295 PMCID: PMC11253168 DOI: 10.1039/d4sc02541e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Accepted: 06/14/2024] [Indexed: 07/20/2024] Open
Abstract
Highly diastereoselective self-assembly reactions give both enantiomers (Λ and Δ) of anti-parallel triple-stranded bimetallic Co(ii) and Co(iii) cationic helices, without the need for resolution; the first such reaction for Co. The complexes are water soluble and stable, even in the case of Co(ii). Studies in a range of cancer and healthy cell lines indicate high activity and selectivity, and substantial differences between enantiomers. The oxidation state has little effect, and correspondingly, Co(iii) compounds are reduced to Co(ii) e.g. by glutathione. In HCT116 colon cancer cells the Λ enantiomer induces dose-dependent G2-M arrest in the cell cycle and disrupts microtubule architectures. This Co(ii) Λ enantiomer is ca. five times more potent than the isostructural Fe(ii) compound. Since the measured cellular uptakes are similar this implies a higher affinity of the Co system for the intracellular target(s); while the two systems are isostructural they have substantially different charge distributions as shown by calculated hydrophobicity maps. In contrast to the Λ enantiomer, Δ-Co(ii) induces G1 arrest in HCT116 cells, efficiently inhibits the topoisomerase I-catalyzed relaxation of supercoiled plasmid DNA, and, unlike the isostructural Fe(ii) system, causes DNA damage. It thus seems very likely that redox chemistry plays a role in the latter.
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Affiliation(s)
- Hualong Song
- Beijing Area Major Laboratory of Peptide and Small Molecular Drugs, Engineering Research Centre of Endogenous Prophylactic of Ministry of Education of China, School of Pharmaceutical Sciences, Capital Medical University Beijing 100069 China
- Department of Chemistry, University of Warwick Coventry CV4 7AL UK
| | - Hana Kostrhunova
- Czech Academy of Sciences, Institute of Biophysics Brno Czech Republic
| | - Jakub Cervinka
- Czech Academy of Sciences, Institute of Biophysics Brno Czech Republic
- Faculty of Science, Department of Biochemistry, Masaryk University Brno Czech Republic
| | - Julie Macpherson
- Department of Chemistry, University of Warwick Coventry CV4 7AL UK
| | - Jaroslav Malina
- Czech Academy of Sciences, Institute of Biophysics Brno Czech Republic
| | - Teena Rajan
- Department of Chemistry, University of Warwick Coventry CV4 7AL UK
| | - Roger Phillips
- Department of Pharmacy, University of Huddersfield Huddersfield HD1 3DH UK
| | - Miles Postings
- Department of Chemistry, University of Warwick Coventry CV4 7AL UK
| | - Samantha Shepherd
- Department of Pharmacy, University of Huddersfield Huddersfield HD1 3DH UK
| | - Xuejian Zhang
- College of Chemistry, State Key Laboratory of Elemento-Organic Chemistry, Nankai University Tianjin 300071 China
| | - Viktor Brabec
- Czech Academy of Sciences, Institute of Biophysics Brno Czech Republic
- Department of Biophysics, Palacky University Olomouc Czech Republic
| | - Nicola J Rogers
- Department of Chemistry, Hong Kong Baptist University Kowloon Tong Hong Kong SAR China
| | - Peter Scott
- Department of Chemistry, University of Warwick Coventry CV4 7AL UK
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2
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Malina J, Crowley JD, Brabec V. Interaction of dinuclear Co(III) cylinders with higher-order DNA structures. Chem Biol Interact 2024; 395:111031. [PMID: 38703805 DOI: 10.1016/j.cbi.2024.111031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2024] [Revised: 04/20/2024] [Accepted: 05/01/2024] [Indexed: 05/06/2024]
Abstract
Alternative DNA structures play critical roles in fundamental biological processes linked to human diseases. Thus, targeting and stabilizing these structures by specific ligands could affect the progression of cancer and other diseases. Here, we describe, using methods of molecular biophysics, the interactions of two oxidatively locked [Co2L3]6+ cylinders, rac-2 and meso-1, with diverse alternative DNA structures, such as junctions, G quadruplexes, and bulges. This study was motivated by earlier results demonstrating that both Co(III) cylinders exhibit potent and selective activity against cancer cells, accumulate in the nucleus of cancer cells, and prove to be efficient DNA binders. The results show that the bigger cylinder rac-2 stabilizes all DNA structures, while the smaller cylinder meso-1 stabilizes just the Y-shaped three-way junctions. Collectively, the results of this study suggest that the stabilization of alternative DNA structures by Co(III) cylinders investigated in this work might contribute to the mechanism of their biological activity.
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Affiliation(s)
- Jaroslav Malina
- Czech Academy of Sciences, Institute of Biophysics, CZ-61200, Brno, Czech Republic
| | - James D Crowley
- Department of Chemistry, University of Otago, Dunedin, 9016, Otago, New Zealand
| | - Viktor Brabec
- Czech Academy of Sciences, Institute of Biophysics, CZ-61200, Brno, Czech Republic; Department of Biophysics, Faculty of Science, Palacky University, CZ-78371, Olomouc, Czech Republic.
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3
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Pokharel U, Naquin A, Fronczek F. Synthesis and crystal structure of a Pd II complex of ortho-xylylenebis(pyridyl-triazole). IUCRDATA 2023; 8:x230362. [PMID: 37151200 PMCID: PMC10162031 DOI: 10.1107/s2414314623003620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 04/20/2023] [Indexed: 05/09/2023] Open
Abstract
A tetra-dentate ligand, namely, ortho-xylylenebis(pyridyl-triazole), o-xpt, was synthesized using the 'click' method and complexed with Pd(BF4)2. In the title com-plex, bis-{μ-1,1'-(o-xylylene)bis-[4-(pyridin-2-yl)triazole]-κN 3:N 3'}dipalladi-um(II) tetra-kis-(tetrafluoridoborate)-di-methyl-formamide-diethyl ether (1/2/1), as the BF4 salt, and including di-methyl-formamide and diethyl ether solvent mol-ecules, with stoichiometry [Pd2(C22H18N8)2](BF4)4·2C3H7NO·C4H10O, the Pd complex and the disordered diethyl ether mol-ecule lie on inversion centers. The ligand coordinates to the PdII centers with square-planar geometry, forming a dimeric macrocycle. The Pd⋯Pd separation in the complex [Pd2(o-xpt)2]4+ cation is 3.6184 (4) Å. In the crystal, the complex mol-ecules are stacked along the b axis, with π-π inter-actions between the pyridyl-triazole ligands of two mol-ecules.
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Affiliation(s)
- Uttam Pokharel
- Department of Chemistry and Physical Sciences, Nicholls State University, 906 E. 1st St., Thibodaux, Louisiana 70301, USA
- Correspondence e-mail:
| | - Aaron Naquin
- Department of Chemistry and Physical Sciences, Nicholls State University, 906 E. 1st St., Thibodaux, Louisiana 70301, USA
| | - Frank Fronczek
- Department of Chemistry, Louisiana State University, Choppin Hall, Baton Rouge, Louisiana 70803, USA
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Flint KL, Huang DM, Linder-Patton OM, Sumby CJ, Keene FR. Synthesis of Triple‐Stranded Diruthenium(II) Compounds. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kate L. Flint
- The University of Adelaide Chemistry 5005 Adelaide AUSTRALIA
| | - David M. Huang
- The University of Adelaide Chemistry 5005 Adelaide AUSTRALIA
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5
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Nural Y, Ozdemir S, Yalcin MS, Demir B, Atabey H, Seferoglu Z, Ece A. New bis- and tetrakis-1,2,3-triazole derivatives: Synthesis, DNA cleavage, molecular docking, antimicrobial, antioxidant activity and acid dissociation constants. Bioorg Med Chem Lett 2022; 55:128453. [PMID: 34801684 DOI: 10.1016/j.bmcl.2021.128453] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 11/01/2021] [Accepted: 11/09/2021] [Indexed: 01/02/2023]
Abstract
In this study, a series of bis- and tetrakis-1,2,3-triazole derivatives were synthesized using copper-catalyzed azide-alkyne cycloaddition (CuAAC) click chemistry in 73-95% yield. The bis- and tetrakis-1,2,3-triazoles exhibited significant DNA cleavage activity while the tetrakis-1,2,3-triazole analog 6g completely degraded the plasmid DNA. Molecular docking simulations suggest that compound 6g acts as minor groove binder of DNA by binding through several noncovalent interactions with base pairs. All bis- and tetrakis-1,2,3-triazole derivatives were screened for antibacterial activity against E. coli, B. cereus, S. aureus, P. aeruginosa, E. hirae, L. pneumophila subsp. pneumophila strains and antifungal activity against microfungus C. albicans and C. tropicalis strains. Compound 4d exhibited the best antibacterial activity among bis-1,2,3-triazoles against E. coli and E. hirae, while 6c exhibited the best antibacterial activity among tetrakis-1,2,3-triazoles against E. hirae. Furthermore, the best antifungal activity against C. albicans and C. tropicalis was reported for the compound 5, while 6d displayed the best antifungal activity against C. tropicalis and C. albicans. Reasonable iron chelating activities and DPPH radical scavenging abilities were found for some of the compounds. Finally, the acid dissociation constants (pKa) of the bis-1,2,3-triazoles were also determined with the help of HYPERQUAD program using the data obtained from potentiometric titrations. The reported data here concludes that the bis- and tetrakis-1,2,3-triazoles are important cores that should be considered for further development of especially new anticancer agents acting through the DNA cleavage activity.
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Affiliation(s)
- Yahya Nural
- Department of Analytical Chemistry, Faculty of Pharmacy, Mersin University, Mersin 33169, Turkey; Advanced Technology, Research and Application Center, Mersin University, 33343 Mersin, Turkey.
| | - Sadin Ozdemir
- Food Processing Programme, Technical Science Vocational School, Mersin University, Mersin 33343, Turkey
| | - Mustafa Serkan Yalcin
- Department of Chemistry and Chemical Processing Technologies, Technical Science Vocational School, Mersin University, Mersin 33343, Turkey
| | - Bunyamin Demir
- Advanced Technology, Research and Application Center, Mersin University, 33343 Mersin, Turkey; Department of Mechanical Engineering, Faculty of Engineering, Mersin University, Mersin 33169, Turkey
| | - Hasan Atabey
- Mersin National Education Directorate, Department of Analytical Chemistry, Mersin, Turkey
| | - Zeynel Seferoglu
- Department of Chemistry, Faculty of Science, Gazi University, Yenimahalle, Ankara TR-06560, Turkey
| | - Abdulilah Ece
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Biruni University, Istanbul 34010, Turkey
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6
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Lisboa LS, Riisom M, Vasdev RAS, Jamieson SMF, Wright LJ, Hartinger CG, Crowley JD. Cavity-Containing [Fe 2L 3] 4+ Helicates: An Examination of Host-Guest Chemistry and Cytotoxicity. Front Chem 2021; 9:697684. [PMID: 34307299 PMCID: PMC8292671 DOI: 10.3389/fchem.2021.697684] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 06/16/2021] [Indexed: 02/04/2023] Open
Abstract
Two new di(2,2′-bipyridine) ligands, 2,6-bis([2,2′-bipyridin]-5-ylethynyl)pyridine (L1) and bis(4-([2,2′-bipyridin]-5-ylethynyl)phenyl)methane (L2) were synthesized and used to generate two metallosupramolecular [Fe2(L)3](BF4)4 cylinders. The ligands and cylinders were characterized using elemental analysis, electrospray ionization mass spectrometry, UV-vis, 1H-, 13C and DOSY nuclear magnetic resonance (NMR) spectroscopies. The molecular structures of the [Fe2(L)3](BF4)4 cylinders were confirmed using X-ray crystallography. Both the [Fe2(L1)3](BF4)4 and [Fe2(L2)3](BF4)4 complexes crystallized as racemic (rac) mixtures of the ΔΔ (P) and ΛΛ (M) helicates. However, 1H NMR spectra showed that in solution the larger [Fe2(L2)3](BF4)4 was a mixture of the rac-ΔΔ/ΛΛ and meso-ΔΛ isomers. The host-guest chemistry of the helicates, which both feature a central cavity, was examined with several small drug molecules. However, none of the potential guests were found to bind within the helicates. In vitro cytotoxicity assays demonstrated that both helicates were active against four cancer cell lines. The smaller [Fe2(L1)3](BF4)4 system displayed low μM activity against the HCT116 (IC50 = 7.1 ± 0.5 μM) and NCI-H460 (IC50 = 4.9 ± 0.4 μM) cancer cells. While the antiproliferative effects against all the cell lines examined were less than the well-known anticancer drug cisplatin, their modes of action would be expected to be very different.
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Affiliation(s)
- Lynn S Lisboa
- Department of Chemistry, University of Otago, Dunedin, New Zealand
| | - Mie Riisom
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand.,Auckland Cancer Society Research Centre, University of Auckland, Auckland, New Zealand
| | - Roan A S Vasdev
- Department of Chemistry, University of Otago, Dunedin, New Zealand
| | - Stephen M F Jamieson
- Auckland Cancer Society Research Centre, University of Auckland, Auckland, New Zealand
| | - L James Wright
- School of Chemical Sciences, University of Auckland, Auckland, New Zealand
| | | | - James D Crowley
- Department of Chemistry, University of Otago, Dunedin, New Zealand
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7
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Song H, Rogers NJ, Brabec V, Clarkson GJ, Coverdale JPC, Kostrhunova H, Phillips RM, Postings M, Shepherd SL, Scott P. Triazole-based, optically-pure metallosupramolecules; highly potent and selective anticancer compounds. Chem Commun (Camb) 2021; 56:6392-6395. [PMID: 32390012 DOI: 10.1039/d0cc02429e] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Functionalised triazole aldehydes are used in the highly selective self-assembly of water-compatible, optically pure, low symmetry Fe(ii)- and Zn(ii)-based metallohelices. Sub-micromolar antiproliferative activity is observed against various cancerous cell lines, accompanied by excellent selectivity versus non-cancerous cells and potential for synergistic combinatorial therapy with cisplatin.
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Affiliation(s)
- Hualong Song
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK.
| | - Nicola J Rogers
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK.
| | - Viktor Brabec
- The Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, CZ-61265 Brno, Czech Republic.
| | - Guy J Clarkson
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK.
| | | | - Hana Kostrhunova
- The Czech Academy of Sciences, Institute of Biophysics, Kralovopolska 135, CZ-61265 Brno, Czech Republic.
| | - Roger M Phillips
- School of Applied Sciences, University of Huddersfield, Huddersfield, HD1 3DH, UK
| | - Miles Postings
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK.
| | - Samantha L Shepherd
- School of Applied Sciences, University of Huddersfield, Huddersfield, HD1 3DH, UK
| | - Peter Scott
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, UK.
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8
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Song H, Postings M, Scott P, Rogers NJ. Metallohelices emulate the properties of short cationic α-helical peptides. Chem Sci 2021; 12:1620-1631. [PMID: 34163922 PMCID: PMC8179244 DOI: 10.1039/d0sc06412b] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2020] [Accepted: 12/24/2020] [Indexed: 12/15/2022] Open
Abstract
Naturally occurring peptides in many living systems perform antimicrobial and anticancer host defence roles, but their potential for clinical application is limited by low metabolic stability and relatively high costs of goods. Self-assembled helical metal complexes provide an attractive synthetic platform for non-peptidic architectures that can emulate some of the properties of short cationic α-helical peptides, with tuneable charge, shape, size and amphipathicity. Correspondingly there is a growing body of evidence demonstrating that these supramolecular architectures exhibit bioactivity that emulates that of the natural systems. We review that evidence in the context of synthetic advances in the area, driven by the potential for biomedical applications. We note some design considerations for new biologically-relevant metallohelices, and give our outlook on the future of these compounds as therapeutic peptidomimetics.
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9
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Metallosupramolecular helices constructed from nickel(II) and multidentate “click” triazole ligands. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114805] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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10
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Zeng H, Stewart-Yates L, Casey LM, Bampos N, Roberts DA. Covalent Post-Assembly Modification: A Synthetic Multipurpose Tool in Supramolecular Chemistry. Chempluschem 2020; 85:1249-1269. [PMID: 32529789 DOI: 10.1002/cplu.202000279] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Revised: 05/25/2020] [Indexed: 11/10/2022]
Abstract
The use of covalent post-assembly modification (PAM) in supramolecular chemistry has grown significantly in recent years, to the point where PAM is now a versatile synthesis tool for tuning, modulating, and expanding the functionality of self-assembled complexes and materials. PAM underpins supramolecular template-synthesis strategies, enables modular derivatization of supramolecular assemblies, permits the covalent 'locking' of unstable structures, and can trigger controlled structural transformations between different assembled morphologies. This Review discusses key examples of PAM spanning a range of material classes, including discrete supramolecular complexes, self-assembled soft nanostructures and hierarchically ordered polymeric and framework materials. As such, we hope to highlight how PAM has continued to evolve as a creative and functional addition to the synthetic chemist's toolbox for constructing bespoke self-assembled complexes and materials.
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Affiliation(s)
- Haoxiang Zeng
- School of Chemistry and Key Center for Polymers and Colloids, The University of Sydney, Sydney, NSW 2006, Australia
| | - Luke Stewart-Yates
- School of Chemistry and Key Center for Polymers and Colloids, The University of Sydney, Sydney, NSW 2006, Australia
| | - Louis M Casey
- School of Chemistry and Key Center for Polymers and Colloids, The University of Sydney, Sydney, NSW 2006, Australia
| | - Nick Bampos
- Department of Chemistry, The University of Cambridge, Cambridge, CB2 1EW, United Kingdom
| | - Derrick A Roberts
- School of Chemistry and Key Center for Polymers and Colloids, The University of Sydney, Sydney, NSW 2006, Australia
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Song H, Allison SJ, Brabec V, Bridgewater HE, Kasparkova J, Kostrhunova H, Novohradsky V, Phillips RM, Pracharova J, Rogers NJ, Shepherd SL, Scott P. Glycoconjugated Metallohelices have Improved Nuclear Delivery and Suppress Tumour Growth In Vivo. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006814] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Hualong Song
- Department of Chemistry University of Warwick Coventry CV4 7AL UK
| | - Simon J. Allison
- School of Applied Sciences University of Huddersfield Huddersfield HD1 3DH UK
| | - Viktor Brabec
- The Czech Academy of Sciences Institute of Biophysics Kralovopolska 135 61265 Brno Czech Republic
| | | | - Jana Kasparkova
- The Czech Academy of Sciences Institute of Biophysics Kralovopolska 135 61265 Brno Czech Republic
| | - Hana Kostrhunova
- The Czech Academy of Sciences Institute of Biophysics Kralovopolska 135 61265 Brno Czech Republic
| | - Vojtech Novohradsky
- The Czech Academy of Sciences Institute of Biophysics Kralovopolska 135 61265 Brno Czech Republic
| | - Roger M. Phillips
- School of Applied Sciences University of Huddersfield Huddersfield HD1 3DH UK
| | - Jitka Pracharova
- The Czech Academy of Sciences Institute of Biophysics Kralovopolska 135 61265 Brno Czech Republic
- Department of Biophysics Centre of the Region Hana for Biotechnological and Agricultural Research Faculty of Science Palacký University Šlechtitelů 27 78371 Olomouc Czech Republic
| | - Nicola J. Rogers
- Department of Chemistry University of Warwick Coventry CV4 7AL UK
| | | | - Peter Scott
- Department of Chemistry University of Warwick Coventry CV4 7AL UK
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12
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Song H, Allison SJ, Brabec V, Bridgewater HE, Kasparkova J, Kostrhunova H, Novohradsky V, Phillips RM, Pracharova J, Rogers NJ, Shepherd SL, Scott P. Glycoconjugated Metallohelices have Improved Nuclear Delivery and Suppress Tumour Growth In Vivo. Angew Chem Int Ed Engl 2020; 59:14677-14685. [PMID: 32489012 PMCID: PMC7497174 DOI: 10.1002/anie.202006814] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Indexed: 12/19/2022]
Abstract
Monosaccharides are added to the hydrophilic face of a self-assembled asymmetric FeII metallohelix, using CuAAC chemistry. The sixteen resulting architectures are water-stable and optically pure, and exhibit improved antiproliferative selectivity against colon cancer cells (HCT116 p53+/+ ) with respect to the non-cancerous ARPE-19 cell line. While the most selective compound is a glucose-appended enantiomer, its cellular entry is not mainly glucose transporter-mediated. Glucose conjugation nevertheless increases nuclear delivery ca 2.5-fold, and a non-destructive interaction with DNA is indicated. Addition of the glucose units affects the binding orientation of the metallohelix to naked DNA, but does not substantially alter the overall affinity. In a mouse model, the glucose conjugated compound was far better tolerated, and tumour growth delays for the parent compound (2.6 d) were improved to 4.3 d; performance as good as cisplatin but with the advantage of no weight loss in the subjects.
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Affiliation(s)
- Hualong Song
- Department of ChemistryUniversity of WarwickCoventryCV4 7ALUK
| | - Simon J. Allison
- School of Applied SciencesUniversity of HuddersfieldHuddersfieldHD1 3DHUK
| | - Viktor Brabec
- The Czech Academy of SciencesInstitute of BiophysicsKralovopolska 13561265BrnoCzech Republic
| | | | - Jana Kasparkova
- The Czech Academy of SciencesInstitute of BiophysicsKralovopolska 13561265BrnoCzech Republic
| | - Hana Kostrhunova
- The Czech Academy of SciencesInstitute of BiophysicsKralovopolska 13561265BrnoCzech Republic
| | - Vojtech Novohradsky
- The Czech Academy of SciencesInstitute of BiophysicsKralovopolska 13561265BrnoCzech Republic
| | - Roger M. Phillips
- School of Applied SciencesUniversity of HuddersfieldHuddersfieldHD1 3DHUK
| | - Jitka Pracharova
- The Czech Academy of SciencesInstitute of BiophysicsKralovopolska 13561265BrnoCzech Republic
- Department of BiophysicsCentre of the Region Hana for Biotechnological and Agricultural ResearchFaculty of SciencePalacký UniversityŠlechtitelů 2778371OlomoucCzech Republic
| | | | | | - Peter Scott
- Department of ChemistryUniversity of WarwickCoventryCV4 7ALUK
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13
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Miyake Y, Itoh Y, Suzuma Y, Kodama H, Kurohara T, Yamashita Y, Narozny R, Hanatani Y, Uchida S, Suzuki T. Metalloprotein-Catalyzed Click Reaction for In Situ Generation of a Potent Inhibitor. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00369] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Yuka Miyake
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan
- Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 1-5 Shimogamo-hangi-cho, Sakyo-ku, Kyoto 606-0823, Japan
| | - Yukihiro Itoh
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan
- Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 1-5 Shimogamo-hangi-cho, Sakyo-ku, Kyoto 606-0823, Japan
| | - Yoshinori Suzuma
- Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 1-5 Shimogamo-hangi-cho, Sakyo-ku, Kyoto 606-0823, Japan
| | - Hidehiko Kodama
- Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 1-5 Shimogamo-hangi-cho, Sakyo-ku, Kyoto 606-0823, Japan
| | - Takashi Kurohara
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan
| | - Yasunobu Yamashita
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan
| | - Remy Narozny
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan
| | - Yutaro Hanatani
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan
| | - Shusaku Uchida
- Graduate School of Medicine, Kyoto University, 53 Shogoin Kawahara-cho, Sakyo-ku, Kyoto 606-8507, Japan
| | - Takayoshi Suzuki
- The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki-shi, Osaka 567-0047, Japan
- Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 1-5 Shimogamo-hangi-cho, Sakyo-ku, Kyoto 606-0823, Japan
- CREST, Japan Science and Technology Agency (JST), 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
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14
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Kreofsky NW, Dillenburg MD, Villa EM, Fletcher JT. Ru(II) coordination compounds of N-N bidentate chelators with 1,2,3 triazole and isoquinoline subunits: Synthesis, spectroscopy and antimicrobial properties. Polyhedron 2019; 177. [PMID: 32863525 DOI: 10.1016/j.poly.2019.114259] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Bidentate chelators 1-(1-benzyl-1,2,3-triazol-4-yl)isoquinoline and 3-(1-benzyl-1,2,3-triazol-4-yl)isoquinoline were prepared from benzyl bromide and trimethylsilylethynylisoquinoline precursors using a tandem deprotection/substitution/CuAAC synthetic approach. Each chelator is capable of forming a stable 3:1 Ru(II) coordination compound, which forms as a geometric isomer mixture. These Ru(II) complexes possess unique MLCT absorbance signatures at 450/472 nm (1-isomer) and 367 nm (3-isomer) relative to their constituent chelating units. Minimum inhibitory concentration values as low as 0.4 μM are observed for Ru(II) complexes against representative Gram-positive bacteria Bacillus subtilis and Staphylococcus epidermidis. Comparing the MIC values of these isoquinoline compounds with analogous 2-(1-benzyl-1,2,3-triazol-4-yl)pyridine compounds shows a 2.5- to 40-fold improvement in potency. This study establishes that increased hydrophobicity introduced at the central chelating units of Ru(II) coordination compounds can be a useful means by which to optimize antimicrobial activity that is complimentary to the variation of peripheral substituent identity at the chelator's N1 triazole position.
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Affiliation(s)
- Nicholas W Kreofsky
- Department of Chemistry, Creighton University, 2500 California Plaza, Omaha, NE 68178, U.S.A
| | - Maxwell D Dillenburg
- Department of Chemistry, Creighton University, 2500 California Plaza, Omaha, NE 68178, U.S.A
| | - Eric M Villa
- Department of Chemistry, Creighton University, 2500 California Plaza, Omaha, NE 68178, U.S.A
| | - James T Fletcher
- Department of Chemistry, Creighton University, 2500 California Plaza, Omaha, NE 68178, U.S.A
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15
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Gusev AN, Shulgin VF, Kiskin MA. Self-Assembly of Polynuclear Complexes Based on Spacer- Armed Pyridylazoles. J STRUCT CHEM+ 2019. [DOI: 10.1134/s0022476619030016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Huang Y, Ren J, Qu X. Nanozymes: Classification, Catalytic Mechanisms, Activity Regulation, and Applications. Chem Rev 2019; 119:4357-4412. [PMID: 30801188 DOI: 10.1021/acs.chemrev.8b00672] [Citation(s) in RCA: 1464] [Impact Index Per Article: 292.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Because of the high catalytic activities and substrate specificity, natural enzymes have been widely used in industrial, medical, and biological fields, etc. Although promising, they often suffer from intrinsic shortcomings such as high cost, low operational stability, and difficulties of recycling. To overcome these shortcomings, researchers have been devoted to the exploration of artificial enzyme mimics for a long time. Since the discovery of ferromagnetic nanoparticles with intrinsic horseradish peroxidase-like activity in 2007, a large amount of studies on nanozymes have been constantly emerging in the next decade. Nanozymes are one kind of nanomaterials with enzymatic catalytic properties. Compared with natural enzymes, nanozymes have the advantages such as low cost, high stability and durability, which have been widely used in industrial, medical, and biological fields. A thorough understanding of the possible catalytic mechanisms will contribute to the development of novel and high-efficient nanozymes, and the rational regulations of the activities of nanozymes are of great significance. In this review, we systematically introduce the classification, catalytic mechanism, activity regulation as well as recent research progress of nanozymes in the field of biosensing, environmental protection, and disease treatments, etc. in the past years. We also propose the current challenges of nanozymes as well as their future research focus. We anticipate this review may be of significance for the field to understand the properties of nanozymes and the development of novel nanomaterials with enzyme mimicking activities.
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Affiliation(s)
- Yanyan Huang
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization , Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun , Jilin 130022 , China.,College of Light Industry and Food Engineering , Nanjing Forestry University , Nanjing 210037 , China
| | - Jinsong Ren
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization , Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun , Jilin 130022 , China
| | - Xiaogang Qu
- Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resource Utilization , Changchun Institute of Applied Chemistry, Chinese Academy of Sciences , Changchun , Jilin 130022 , China
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17
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Conradie J, Conradie M, Mtshali Z, van der Westhuizen D, Tawfiq K, Al-Jeboori M, Coles S, Wilson C, Potgieter J. Synthesis, characterisation and electrochemistry of eight Fe coordination compounds containing substituted 2-(1-(4-R-phenyl-1H-1,2,3-triazol-4-yl)pyridine ligands, R = CH3, OCH3, COOH, F, Cl, CN, H and CF3. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.09.056] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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Ahmedova A. Biomedical Applications of Metallosupramolecular Assemblies-Structural Aspects of the Anticancer Activity. Front Chem 2018; 6:620. [PMID: 30619828 PMCID: PMC6302020 DOI: 10.3389/fchem.2018.00620] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Accepted: 11/30/2018] [Indexed: 01/25/2023] Open
Abstract
The design and development of metallosupramolecular systems has resulted in construction of a myriad of fascinating structures with highly diverse properties and potential applications. Assessment of the biomedical applications of metallosupramolecular assemblies is an emerging field of research that stems from the recently demonstrated promising results on such systems. After the pioneering works of Therrien and coworkers on organometallic Ru-cages with promising anticancer properties, this topic has evolved to the more recent studies on bioactivity of supramolecular coordination complexes built from different metal ions and various multidentate ligands. Sufficient amount of data on the anticancer activity of metallosupramolecules has already been reported and allows outlining some general tendencies in the structural aspects of the biological activity. The main structural properties of the complexes that can be readily modified to enhance their activity are the size, the shape and charge of the formed complexes. Moreover, the intrinsic properties of the building components could predetermine some of the main characteristics of the overall supramolecular complex, such as its optical properties, chemical reactivity, solubility, etc., and could, thereby, define the areas of its biomedical applications. The unique structural property of most of the metallosupramolecular assemblies, however, is the presence of a discrete cavity that renders a whole range of additional applications resulting from specific host-guest interactions. The encapsulations of small bioactive or fluorescent molecules have been employed for delivery or recognition purposes in many examples. On the other hand, metallosupramolecules have been imbedded into target-specific polymeric nanoparticles that resulted in a successful combination of their therapeutic and diagnostic properties, making them promising for theranostic application in cancer treatment. The aim of this review paper is to mark out some key tendencies in the reported metallosupramolecular structures in relation with their biological activity and potential areas of biomedical application. In this way, a useful set of guidelines can be delineated to help synthetic chemists broaden the application areas of their supramolecular systems by few structural changes.
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Affiliation(s)
- Anife Ahmedova
- Laboratory of Biocoordination and Bioanalytical Chemistry, Faculty of Chemistry and Pharmacy, Sofia University, Sofia, Bulgaria
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19
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Miron CE, Fleischel O, Petitjean A. To Loop or Not to Loop: Influence of Hinge Flexibility on Self-Assembly Outcomes for Acridine-Based Triazolylpyridine Chelates with Zinc(II), Iron(II), and Copper(II). Chemistry 2018; 24:17318-17326. [PMID: 30252967 DOI: 10.1002/chem.201803732] [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: 07/20/2018] [Revised: 09/05/2018] [Indexed: 11/07/2022]
Abstract
Coordination-driven self-assembly has been established as an effective strategy for the efficient construction of intricate architectures in both natural and artificial systems, for applications ranging from gene regulation to metal-organic frameworks. Central to these systems is the need for carefully designed organic ligands, generally with rigid components, that can undergo self-assembly with metal ions in a predictable manner. Herein, we report the synthesis and study of three novel organic ligands that feature 3,6-disubstituted acridine as a rigid spacer connected to two 2-(1,2,3-triazol-4-yl)pyridine "click" chelates through hinges of the same length but differing flexibility. The flexibility of these "three-atom" hinges was modulated by i) moving from secondary to tertiary amide functional groups and ii) replacing an sp2 amide carbon with an sp3 methylene carbon. In an effort to understand the role of hinge flexibility in directing self-assembly into mononuclear loops or dinuclear cylinders, the impact of these changes on self-assembly outcomes with zinc(II), iron(II), and copper(II) ions is described.
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Affiliation(s)
- Caitlin E Miron
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, ON, K7L3N6, Canada
| | | | - Anne Petitjean
- Department of Chemistry, Queen's University, 90 Bader Lane, Kingston, ON, K7L3N6, Canada
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20
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Brissos RF, Korrodi-Gregório L, Pérez-Tomás R, Roubeau O, Gamez P. Antiproliferative properties of iron supramolecular cylinders. ACTA ACUST UNITED AC 2018. [DOI: 10.28954/2018.csq.11.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The use of metallohelicates as potential antiproliferative agents is mostly exemplified by one sole family of supramolecular compounds that is based on bis-iminopyridine ligands. In the present investigation, two other types of metallocylinders have been selected and their potential DNA-binding and cytotoxic properties have been investigated. Hence, two new neutral iron(III) metallosupramolecular compounds have been prepared from bis-β-diketone ligands, and a known cationic iron(II) helicate from bis-pyrazole ligands has been used for comparison purposes. DNA-interaction experiments and cell studies reveal remarkable biological properties for one of the neutral iron cylinders and the positively charged, pyrazole-based helicate, as illustrated by their antiproliferative behaviours, which are far better than those of two well-known compounds, i.e. the most studied metallohelicate in the field and cisplatin.
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21
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Miron CE, Colden Leung MR, Kennedy EI, Fleischel O, Khorasani MA, Wu N, Mergny J, Petitjean A. Closing the Loop: Triazolylpyridine Coordination Drives the Self‐Assembly of Metallomacrocycles with Tunable Topologies for Small‐Molecule and Guanine‐Quadruplex Recognition. Chemistry 2018; 24:18718-18734. [DOI: 10.1002/chem.201803731] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 09/13/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Caitlin E. Miron
- Department of ChemistryQueen's University 90 Bader Lane Kingston ON K7L 3N6 Canada
| | | | - Emily I. Kennedy
- Department of ChemistryQueen's University 90 Bader Lane Kingston ON K7L 3N6 Canada
| | | | | | - Nan Wu
- Department of ChemistryQueen's University 90 Bader Lane Kingston ON K7L 3N6 Canada
| | - Jean‐Louis Mergny
- ARNA laboratoryIECBUniversité de Bordeaux, CNRS UMR5320, Inserm U1212 Pessac France
| | - Anne Petitjean
- Department of ChemistryQueen's University 90 Bader Lane Kingston ON K7L 3N6 Canada
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22
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Preston D, Findlay JA, Crowley JD. Recognition Properties and Self‐assembly of Planar [M(2‐pyridyl‐1,2,3‐triazole)2]2+Metallo‐ligands. Chem Asian J 2018; 14:1136-1142. [DOI: 10.1002/asia.201801132] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Dan Preston
- Department of ChemistryUniversity of Otago PO Box 56 Dunedin 9054 New Zealand
| | - James A. Findlay
- Department of ChemistryUniversity of Otago PO Box 56 Dunedin 9054 New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology New Zealand
| | - James D. Crowley
- Department of ChemistryUniversity of Otago PO Box 56 Dunedin 9054 New Zealand
- MacDiarmid Institute for Advanced Materials and Nanotechnology New Zealand
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23
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Kitteringham E, Zhou Z, Twamley B, Griffith DM. Au(III) and Pt(II) Complexes of a Novel and Versatile 1,4-Disubstituted 1,2,3-Triazole-Based Ligand Possessing Diverse Secondary and Tertiary Coordinating Groups. Inorg Chem 2018; 57:12282-12290. [PMID: 30192529 DOI: 10.1021/acs.inorgchem.8b01994] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel 1,4-disubstituted 1,2,3-triazole-based ligand, 2-(4-(pyridin-2-yl)-1 H-1,2,3-triazol-1-yl)propane-1,3-diamine (ptpd), which possesses pyridyl and diamino secondary and tertiary coordinating groups was synthesized in excellent yield. The reactivity of 2-(1-phenyl-1 H-1,2,3-triazol-4-yl)pyridine (ptp), di- tert-butyl (2-azidopropane-1,3-diyl)dicarbamate (Boc2-ptpd), and ptpd·3HCl was investigated with Au(III) and Pt(II) precursors. Analysis including X-ray crystal structures of [Au(III)Cl3(ptp)] (1), [Au(III)Cl2(ptpd)][Au(I)Cl2][OH]{[NaAuCl4·2H2O]} n (3), and [Pt(II)Cl2(ptpdH2)][PtCl4] (4) revealed that ptpd (i) serves as a monodentate ligand for Au(III) coordinating to the metal center via the pyridine nitrogen only, (ii) preferentially coordinates Au(III) via the bidentate diamino group over the monodentate pyridine group, (iii) can coordinate Pt(II) in a bidentate fashion via the pyridyl nitrogen and the triazole N-3, and (iv) can bridge two Pt(II) centers through bidentate chelation at the diamino group and bidentate chelation via the pyridyl nitrogen and the triazole N-3. ptpd represents a versatile ligand template for the development of mixed metal complexes.
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Affiliation(s)
- Eolann Kitteringham
- Department of Chemistry , RCSI , 123 St. Stephens Green , Dublin 2 , Ireland
| | - Zehao Zhou
- College of Pharmaceutical Sciences , Soochow University , 199 Ren'ai Rd., Suzhou Industrial Park , Soochow , Jiangsu , China , 215123
| | - Brendan Twamley
- School of Chemistry , Trinity College Dublin, University of Dublin , Dublin 2 , Ireland
| | - Darren M Griffith
- Department of Chemistry , RCSI , 123 St. Stephens Green , Dublin 2 , Ireland
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24
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Conradie J, Conradie M, Tawfiq K, Al-Jeboori M, Coles S, Wilson C, Potgieter J. Synthesis, characterization, experimental and theoretical structure of novel Dichloro(bis{2-[1-(4-methoxyphenyl)-1H-1,2,3-triazol-4-yl-κN3]pyridine-κN})metal(II) compounds, metal = Mn, Co and Ni. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.02.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Hosseinnejad T, Ebrahimpour-Malmir F, Fattahi B. Computational investigations of click-derived 1,2,3-triazoles as keystone ligands for complexation with transition metals: a review. RSC Adv 2018; 8:12232-12259. [PMID: 35539398 PMCID: PMC9079615 DOI: 10.1039/c8ra00283e] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 01/04/2019] [Accepted: 03/02/2018] [Indexed: 01/05/2023] Open
Abstract
In recent years, metal complexes of organo 1,2,3-triazole click-derived ligands have attracted significant attention as catalysts in many chemical transformations and also as biological and pharmaceutical active agents. Regarding the important applications of these metal-organo 1,2,3-triazole-based complexes, in this review, we focused on the recently reported investigations of the structural, electronic, and spectroscopic aspects of the complexation process in transition metal complexes of 1,2,3-triazole-based click ligands. In line with this, the coordination properties of these triazole-based click ligands with transition metals were studied via several quantum chemistry calculations. Moreover, considering the complexation process, we have presented comparative discussions between the computational results and the available experimental data.
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Affiliation(s)
- Tayebeh Hosseinnejad
- Department of Chemistry, Faculty of Physics & Chemistry, Alzahra University Vanak Tehran Iran +98-21-8804-1344 +98-9124775800
| | - Fatemeh Ebrahimpour-Malmir
- Department of Chemistry, Faculty of Physics & Chemistry, Alzahra University Vanak Tehran Iran +98-21-8804-1344 +98-9124775800
| | - Bahareh Fattahi
- Department of Chemistry, Faculty of Physics & Chemistry, Alzahra University Vanak Tehran Iran +98-21-8804-1344 +98-9124775800
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26
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Abstract
Over the past few decades, supramolecular chirality in discrete metallosupramolecular architectures has received considerable attention. In this review, a comprehensive summary of discrete, chiral coordination-driven structures, including helices, metallacycles, metallocages, etc., is presented. Although chirality can be introduced prior to, during or even after the coordination self-assembly process, this review puts major emphasis on the more recent development of metallosupramolecular architectures from chiral components, where chirality arises from the enantiopure or racemic scaffolds (bridging or auxiliary ligand). Special attention will be paid to homochiral metallo-assemblies using achiral components where chirality is obtained as a consequence of the twisting of the ligands. Additionally, the potential applications of homochiral metallosupramolecular architectures are also discussed. We hope that this review will be of interest to researchers attempting to design new elaborate homochiral metallosupramolecular architectures with even greater complexity and potential for functions such as chiral recognition, enantiomer separation, asymmetric catalysis, nonlinear sensors, and devices.
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Affiliation(s)
- Li-Jun Chen
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, Shanghai 200062, P. R. China.
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27
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van Hilst QVC, Lagesse NR, Preston D, Crowley JD. Functional metal complexes from CuAAC “click” bidentate and tridentate pyridyl-1,2,3-triazole ligands. Dalton Trans 2018; 47:997-1002. [DOI: 10.1039/c7dt04570k] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
This Frontiers article examines the use of “click” complexes for the development of catalysts, anti-cancer and anti-bacterial agents and emissive materials.
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Affiliation(s)
| | | | - Dan Preston
- Department of Chemistry
- University of Otago
- Dunedin 9054
- New Zealand
| | - James D. Crowley
- Department of Chemistry
- University of Otago
- Dunedin 9054
- New Zealand
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28
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Struch N, Topić F, Schnakenburg G, Rissanen K, Lützen A. Electron-Deficient Pyridylimines: Versatile Building Blocks for Functional Metallosupramolecular Chemistry. Inorg Chem 2017; 57:241-250. [DOI: 10.1021/acs.inorgchem.7b02412] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Niklas Struch
- Kekulé-Institut
für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, D-53121 Bonn, Germany
| | - Filip Topić
- University of Jyväskylä, Department of
Chemistry, Nanoscience Center, P.O. Box
35, 40014 Jyväskylä, Finland
| | - Gregor Schnakenburg
- Institut
für Anorganische Chemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, D-53121 Bonn, Germany
| | - Kari Rissanen
- University of Jyväskylä, Department of
Chemistry, Nanoscience Center, P.O. Box
35, 40014 Jyväskylä, Finland
| | - Arne Lützen
- Kekulé-Institut
für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, D-53121 Bonn, Germany
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29
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Scattergood PA, Sinopoli A, Elliott PI. Photophysics and photochemistry of 1,2,3-triazole-based complexes. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.06.017] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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30
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Ross DAW, Preston D, Crowley JD. Self-Assembly with 2,6-Bis(1-(pyridin-4-ylmethyl)-1H-1,2,3-triazol-4-yl)pyridine: Silver(I) and Iron(II) Complexes. Molecules 2017; 22:E1762. [PMID: 29048381 PMCID: PMC6151823 DOI: 10.3390/molecules22101762] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 10/14/2017] [Accepted: 10/14/2017] [Indexed: 12/17/2022] Open
Abstract
A new "click" ligand, 2,6-bis(1-(pyridin-4-ylmethyl)-1H-1,2,3-triazol-4-yl)pyridine (L) featuring a tridentate 2,6-bis(1,2,3-triazol-4-yl)pyridine (tripy) pocket and two pyridyl (py) units was synthesized in modest yield (42%) using the copper(I) catalyzed azide-alkyne cycloaddition (CuAAC) reaction. The coordination chemistry of the ligand with silver(I) and iron(II) ions was examined using a battery of solution (¹H and DOSY (diffusion ordered spectroscopy) nuclear magnetic resonance (NMR), infrared and absorption spectroscopies, high-resolution electrospray ionization mass spectrometry (HR-ESI-MS)), and solid state (X-ray crystallography, elemental analysis) techniques. When treated with silver(I) ions, the ligand forms discrete [Ag(L)]⁺ (X-, where X- = BF₄-, NO₃- or SbF₆-) complexes in dimethyl sulfoxide (DMSO) solution but these complexes crystallize as coordination polymers. The addition of [Fe(H₂O)₆](BF₄)₂ to an acetonitrile solution of the ligand forms the expected monomeric octahedral [Fe(L)₂]2+ complex and treatment of the iron(II) complex with AgBF₄ generates a heterometallic linear coordination polymer.
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Affiliation(s)
- Daniel A W Ross
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9016, Otago, New Zealand.
| | - Dan Preston
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9016, Otago, New Zealand.
| | - James D Crowley
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9016, Otago, New Zealand.
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31
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Kim TY, Digal L, Gardiner MG, Lucas NT, Crowley JD. Octahedral [Pd6
L8
]12+
Metallosupramolecular Cages: Synthesis, Structures and Guest-Encapsulation Studies. Chemistry 2017; 23:15089-15097. [DOI: 10.1002/chem.201702518] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2017] [Revised: 08/17/2017] [Indexed: 01/09/2023]
Affiliation(s)
- Tae Y. Kim
- Department of Chemistry; University of Otago; PO Box 56 Dunedin New Zealand
| | - Lori Digal
- Department of Chemistry; University of Otago; PO Box 56 Dunedin New Zealand
| | - Michael G. Gardiner
- School of Physical Sciences (Chemistry); University of Tasmania; Hobart Australia
| | - Nigel T. Lucas
- Department of Chemistry; University of Otago; PO Box 56 Dunedin New Zealand
| | - James D. Crowley
- Department of Chemistry; University of Otago; PO Box 56 Dunedin New Zealand
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32
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Kobayashi Y, Kameda T, Hoshino M, Fujii N, Ohno H, Oishi S. Fe(ii)-Complexation of tripodal hexapeptide ligands with three bidentate triazolylpyridines: induction of metal-centred chirality by peptide macrocyclization. Dalton Trans 2017; 46:13673-13676. [DOI: 10.1039/c7dt02739g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cyclic and open-chain hexapeptides with three common triazolyl-pyridine residues afforded two Fe(ii) complexes with distinct metal-centred chirality.
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Affiliation(s)
- Yuka Kobayashi
- Graduate School of Pharmaceutical Sciences
- Kyoto University
- Kyoto 606-8501
- Japan
| | - Tomoshi Kameda
- Artificial Intelligence Research Centre
- National Institute of Advanced Industrial Science and Technology (AIST)
- Tokyo 135-0064
- Japan
| | - Masaru Hoshino
- Graduate School of Pharmaceutical Sciences
- Kyoto University
- Kyoto 606-8501
- Japan
| | - Nobutaka Fujii
- Graduate School of Pharmaceutical Sciences
- Kyoto University
- Kyoto 606-8501
- Japan
| | - Hiroaki Ohno
- Graduate School of Pharmaceutical Sciences
- Kyoto University
- Kyoto 606-8501
- Japan
| | - Shinya Oishi
- Graduate School of Pharmaceutical Sciences
- Kyoto University
- Kyoto 606-8501
- Japan
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33
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Investigating the cytotoxicity of platinum(II) complexes incorporating bidentate pyridyl-1,2,3-triazole “click” ligands. J Inorg Biochem 2016; 165:92-99. [DOI: 10.1016/j.jinorgbio.2016.06.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2016] [Revised: 05/16/2016] [Accepted: 06/14/2016] [Indexed: 01/04/2023]
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34
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Vasdev RAS, Preston D, Scottwell SØ, Brooks HJL, Crowley JD, Schramm MP. Oxidatively Locked [Co₂L₃] 6+ Cylinders Derived from Bis(bidentate) 2-Pyridyl-1,2,3-triazole "Click" Ligands: Synthesis, Stability, and Antimicrobial Studies. Molecules 2016; 21:E1548. [PMID: 27854348 PMCID: PMC6273053 DOI: 10.3390/molecules21111548] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Revised: 11/04/2016] [Accepted: 11/10/2016] [Indexed: 11/17/2022] Open
Abstract
A small family of [Co₂(Lpytrz)₃]6+ cylinders was synthesised from bis(bidentate) 2-pyridyl-1,2,3-triazole "click" ligands (Lpytrz) through an "assembly-followed-by-oxidation" method. The cylinders were characterised using ¹H, 13C, and DOSY NMR, IR, and UV-Vis spectroscopies, along with electrospray ionisation mass spectrometry (ESMS). Stability studies were conducted in dimethyl sulfoxide (DMSO) and D₂O. In contrast to similar, previously studied, [Fe₂(Lpytrz)₃]4+ helicates the more kinetically inert [Co₂(Lpytrz)₃]6+ systems proved stable (over a period of days) when exposed to DMSO and were even more stable in D₂O. The triply stranded [Co₂(Lpytrz)₃]6+ systems and the corresponding "free" ligands were tested for antimicrobial activity in vitro against both Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) microorganisms. Agar-based disk diffusion and Mueller-Hinton broth micro-dilution assays showed that the [Co₂(Lpytrz)₃]6+ cylinders were not active against either strain of bacteria. It is presumed that a high charge of the [Co₂(Lpytrz)₃]6+ cylinders is preventing them from crossing the bacterial cell membranes, rendering the compounds biologically inactive.
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Affiliation(s)
- Roan A S Vasdev
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9016, Otago, New Zealand.
| | - Dan Preston
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9016, Otago, New Zealand.
| | - Synøve Ø Scottwell
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9016, Otago, New Zealand.
| | - Heather J L Brooks
- Department of Microbiology and Immunology, University of Otago, P.O. Box 56, 720 Cumberland Street, Dunedin 9054, Otago, New Zealand.
| | - James D Crowley
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9016, Otago, New Zealand.
| | - Michael P Schramm
- Department of Chemistry and Biochemistry, California State University, Long Beach, 1250 Bellflower Boulevard, Long Beach, CA 90840-9507, USA.
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35
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Kumar SV, Scottwell SØ, Waugh E, McAdam CJ, Hanton LR, Brooks HJL, Crowley JD. Antimicrobial Properties of Tris(homoleptic) Ruthenium(II) 2-Pyridyl-1,2,3-triazole “Click” Complexes against Pathogenic Bacteria, Including Methicillin-Resistant Staphylococcus aureus (MRSA). Inorg Chem 2016; 55:9767-9777. [DOI: 10.1021/acs.inorgchem.6b01574] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Sreedhar V. Kumar
- Department
of Chemistry, University of Otago, PO Box 56, Dunedin, New Zealand
- Department
of Microbiology and Immunology, Otago School of Medical Sciences, University of Otago, PO Box 56, Dunedin, New Zealand
| | - Synøve Ø. Scottwell
- Department
of Chemistry, University of Otago, PO Box 56, Dunedin, New Zealand
- Department
of Microbiology and Immunology, Otago School of Medical Sciences, University of Otago, PO Box 56, Dunedin, New Zealand
| | - Emily Waugh
- Department
of Microbiology and Immunology, Otago School of Medical Sciences, University of Otago, PO Box 56, Dunedin, New Zealand
| | - C. John McAdam
- Department
of Chemistry, University of Otago, PO Box 56, Dunedin, New Zealand
| | - Lyall R. Hanton
- Department
of Chemistry, University of Otago, PO Box 56, Dunedin, New Zealand
| | - Heather J. L. Brooks
- Department
of Microbiology and Immunology, Otago School of Medical Sciences, University of Otago, PO Box 56, Dunedin, New Zealand
| | - James D. Crowley
- Department
of Chemistry, University of Otago, PO Box 56, Dunedin, New Zealand
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36
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Preston D, Tucker RAJ, Garden AL, Crowley JD. Heterometallic [MnPtn(L)2n]x+ Macrocycles from Dichloromethane-Derived Bis-2-pyridyl-1,2,3-triazole Ligands. Inorg Chem 2016; 55:8928-34. [DOI: 10.1021/acs.inorgchem.6b01435] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Dan Preston
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand
| | - Robert A. J. Tucker
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand
| | - Anna L. Garden
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand
| | - James D. Crowley
- Department of Chemistry, University of Otago, P.O. Box 56, Dunedin 9054, New Zealand
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37
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Gouré E, Gerey B, Clémancey M, Pécaut J, Molton F, Latour JM, Blondin G, Collomb MN. Intramolecular Electron Transfers Thwart Bistability in a Pentanuclear Iron Complex. Inorg Chem 2016; 55:9178-86. [PMID: 27251764 DOI: 10.1021/acs.inorgchem.6b00791] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
With the intention to investigate the redox properties of polynuclear complexes as previously reported for the pentamanganese complex [{Mn(II)(μ-bpp)3}2Mn(III)Mn(II)2(μ3-O)](3+) (2(3+)), we focused on the analogous pentairon complex that was previously isolated as all-ferrous. As Masaoka and co-workers recently published, aerobic synthesis leads to the [{Fe(II)(μ-bpp)3}2Fe(III)Fe(II)2(μ3-O)](3+) complex (1(3+)). This species exhibits in acetonitrile solution four reversible one-electron oxidation waves. Accordingly, the three oxidized species 1(4+), 1(5+), and 1(6+) with a 3Fe(II)2Fe(III), 2Fe(II)3Fe(III), and 1Fe(II)4Fe(III) composition, respectively, were generated by bulk electrolysis and isolated. Mössbauer spectroscopy allowed us to determine the spin states of all the iron ions and to unambiguously locate the sites of the successive oxidations. They all occur in the μ3-oxo core except for the 1(4+) to 1(5+) process that presents a striking electronic rearrangement, with both metals in axial position being oxidized while the core is reduced to the [Fe(III)Fe(II)2(μ3-O)](5+) oxidation level. This strongly differs from the redox behavior of the Mn5 system. The origin of this electronic switch is discussed.
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Affiliation(s)
- Eric Gouré
- Université Grenoble Alpes, DCM, F-38000 Grenoble, France.,CNRS, DCM, F-38000 Grenoble, France
| | - Bertrand Gerey
- Université Grenoble Alpes, DCM, F-38000 Grenoble, France.,CNRS, DCM, F-38000 Grenoble, France
| | - Martin Clémancey
- Université Grenoble Alpes, LCBM, pmb, F-38000 Grenoble, France.,CEA, BIG-LCBM, pmb, F-38000 Grenoble, France
| | - Jacques Pécaut
- Université Grenoble Alpes, INAC-SyMMES, F-38000 Grenoble, France.,CEA, INAC-SyMMES, Reconnaissance Ionique et Chimie de Coordination, F-38000 Grenoble, France
| | - Florian Molton
- Université Grenoble Alpes, DCM, F-38000 Grenoble, France.,CNRS, DCM, F-38000 Grenoble, France
| | | | - Geneviève Blondin
- CEA, BIG-LCBM, pmb, F-38000 Grenoble, France.,CNRS UMR 5249, LCBM, pmb, F-38000 Grenoble, France
| | - Marie-Noëlle Collomb
- Université Grenoble Alpes, DCM, F-38000 Grenoble, France.,CNRS, DCM, F-38000 Grenoble, France
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38
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Elliott ABS, Lewis JEM, van der Salm H, McAdam CJ, Crowley JD, Gordon KC. Luminescent Cages: Pendant Emissive Units on [Pd2L4]4+ “Click” Cages. Inorg Chem 2016; 55:3440-7. [DOI: 10.1021/acs.inorgchem.5b02843] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
| | - James E. M. Lewis
- Department of Chemistry, University of Otago,
P.O. Box 56, Dunedin, New Zealand
| | - Holly van der Salm
- Department of Chemistry, University of Otago,
P.O. Box 56, Dunedin, New Zealand
| | - C. John McAdam
- Department of Chemistry, University of Otago,
P.O. Box 56, Dunedin, New Zealand
| | - James D. Crowley
- Department of Chemistry, University of Otago,
P.O. Box 56, Dunedin, New Zealand
| | - Keith C. Gordon
- Department of Chemistry, University of Otago,
P.O. Box 56, Dunedin, New Zealand
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39
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Preston D, McNeill SM, Lewis JEM, Giles GI, Crowley JD. Enhanced kinetic stability of [Pd2L4]4+ cages through ligand substitution. Dalton Trans 2016; 45:8050-60. [DOI: 10.1039/c6dt00133e] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
[Pd2(tripy)4]4+ cage architectures (where tripy = 2,6-bis(pyridin-3-ylethynyl)pyridine) were made more kinetically robust in the presence of range of nucleophiles by the addition of amino groups in either the 2-(2A-tripy) or 3-(3A-tripy) positions of the tripy ligands' terminal pyridines, with the [Pd2(2A-tripy)4]4+ cage proving the most stable.
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Affiliation(s)
- Dan Preston
- Department of Chemistry
- University of Otago
- Dunedin
- New Zealand
| | - Samantha M. McNeill
- Department of Pharmacology and Toxicology
- University of Otago
- Dunedin
- New Zealand
| | | | - Gregory. I. Giles
- Department of Pharmacology and Toxicology
- University of Otago
- Dunedin
- New Zealand
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40
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Alexandru MG, Dumitru F. Crystal structure of tris-(μ-bis-{4-[(pyridin-2-yl-methyl-idene)amino]-phen-yl}methane-κ(4) N,N':N'',N''')dizinc tetra-kis-(tetra-fluorido-borate) aceto-nitrile tris-olvate. Acta Crystallogr E Crystallogr Commun 2015; 71:m271-2. [PMID: 26870460 PMCID: PMC4719869 DOI: 10.1107/s205698901502455x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Accepted: 12/21/2015] [Indexed: 11/14/2022]
Abstract
The asymmetric unit of the title compound, [Zn2(C25H20N4)3](BF4)4·3CH3CN, consists of one dinuclear Zn(II) complex cation with a triple-helical [Zn2 L 3](4+) motif (L is bis-{4-[(pyridin-2-yl-methyl-idene)amino]-phen-yl}methane), four BF4 (-) anions and three CH3CN solvent mol-ecules. The Zn⋯Zn separation is 11.3893 (14) Å and the ligands wrap around the two Zn(II) atoms, forming a triple helix as defined by the Zn-N-N-Zn torsion angles of 104.05 (18), 99.06 (19) and 101.40 (19)°. The Zn-N(pyrid-yl) distances in the octahedral ZnN6 coordination sphere are in the range 2.128 (5)-2.190 (5) Å and the Zn-N(imine) distances are in the range 2.157 (5)-2.277 (5) Å.
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Affiliation(s)
- Maria-Gabriela Alexandru
- Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Polizu 1, 011061 Bucharest, Romania
| | - Florina Dumitru
- Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, Polizu 1, 011061 Bucharest, Romania
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41
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Dabb SL, Fletcher NC. mer and fac isomerism in tris chelate diimine metal complexes. Dalton Trans 2015; 44:4406-22. [PMID: 25600485 DOI: 10.1039/c4dt03535f] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this perspective, we highlight the issue of meridional (mer) and facial (fac) orientation of asymmetrical diimines in tris-chelate transition metal complexes. Diimine ligands have long been the workhorse of coordination chemistry, and whilst there are now good strategies to isolate materials where the inherent metal centered chirality is under almost complete control, and systematic methodologies to isolate heteroleptic complexes, the conceptually simple geometrical isomerism has not been widely investigated. In systems where the two donor atoms are significantly different in terms of the σ-donor and π-accepting ability, the fac isomer is likely to be the thermodynamic product. For the diimine complexes with two trigonal planar nitrogen atoms there is much more subtlety to the system, and external factors such as the solvent, lattice packing and the various steric considerations play a delicate role in determining the observed and isolable product. In this article we discuss the possibilities to control the isomeric ratio in labile systems, consider the opportunities to separate inert complexes and discuss the observed differences in their spectroscopic properties. Finally we report on the ligand orientation in supramolecular systems where facial coordination leads to simple regular structures such as helicates and tetrahedra, but the ability of the ligand system to adopt a mer orientation enables self-assembled structures of considerable beauty and complexity.
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Affiliation(s)
- Serin L Dabb
- School of Chemistry and Chemical Engineering, Queen's University of Belfast, David Keir Building, Belfast, Northern Ireland BT9 5AG, UK.
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42
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McNeill SM, Preston D, Lewis JEM, Robert A, Knerr-Rupp K, Graham DO, Wright JR, Giles GI, Crowley JD. Biologically active [Pd2L4](4+) quadruply-stranded helicates: stability and cytotoxicity. Dalton Trans 2015; 44:11129-36. [PMID: 25997516 DOI: 10.1039/c5dt01259g] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
There is emerging interest in the anti-proliferative effects of metallosupramolecular systems due to the different size and shape of these metallo-architectures compared to traditional small molecule drugs. Palladium(II)-containing systems are the most abundant class of metallosupramolecular complexes, yet their biological activity has hardly been examined. Here a small series of [Pd2(L)4](BF4)4 quadruply-stranded, dipalladium(II) architectures were screened for their cytotoxic effects against three cancer cell lines and one non-malignant line. The helicates exhibited a range of cytotoxic properties, with the most cytotoxic complex [Pd2(hextrz)4](BF4)4 possessing low micromolar IC50 values against all of the cell lines tested, while the other helicates displayed moderate or no cytotoxicity. Against the MDA-MB-231 cell line, which is resistant to platinum-based drugs, [Pd2(hextrz)4](BF4)4 was 7-fold more active than cisplatin. Preliminary mechanistic studies indicate that the [Pd2(hextrz)4](BF4)4 helicate does not induce cell death in the same way as clinically used metal complexes such as cisplatin. Rather than interacting with DNA, the helicate appears to disrupt the cell membrane. These studies represent the first biological characterisation of quadruply-stranded helicate architectures, and provide insight into the design requirements for the development of biologically active and stable palladium(II)-containing metallosupramolecular architectures.
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Affiliation(s)
- Samantha M McNeill
- Department of Pharmacology and Toxicology, University of Otago, P.O. Box 913, Dunedin, New Zealand.
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43
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Lo WKC, Huff GS, Cubanski JR, Kennedy ADW, McAdam CJ, McMorran DA, Gordon KC, Crowley JD. Comparison of inverse and regular 2-pyridyl-1,2,3-triazole "click" complexes: structures, stability, electrochemical, and photophysical properties. Inorg Chem 2015; 54:1572-87. [PMID: 25615621 DOI: 10.1021/ic502557w] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Two inverse 2-pyridyl-1,2,3-triazole "click" ligands, 2-(4-phenyl-1H-1,2,3-triazol-1-yl)pyridine and 2-(4-benzyl-1H-1,2,3-triazol-1-yl)pyridine, and their palladium(II), platinum(II), rhenium(I), and ruthenium(II) complexes have been synthesized in good to excellent yields. The properties of these inverse "click" complexes have been compared to the isomeric regular compounds using a variety of techniques. X-ray crystallographic analysis shows that the regular and inverse complexes are structurally very similar. However, the chemical and physical properties of the isomers are quite different. Ligand exchange studies and density functional theory (DFT) calculations indicate that metal complexes of the regular 2-(1-R-1H-1,2,3-triazol-4-yl)pyridine (R = phenyl, benzyl) ligands are more stable than those formed with the inverse 2-(4-R-1H-1,2,3-triazol-1-yl)pyridine (R = phenyl, benzyl) "click" chelators. Additionally, the bis-2,2'-bipyridine (bpy) ruthenium(II) complexes of the "click" chelators have been shown to have short excited state lifetimes, which in the inverse triazole case, resulted in ejection of the 2-pyridyl-1,2,3-triazole ligand from the complex. Under identical conditions, the isomeric regular 2-pyridyl-1,2,3-triazole ruthenium(II) bpy complexes are photochemically inert. The absorption spectra of the inverse rhenium(I) and platinum(II) complexes are red-shifted compared to the regular compounds. It is shown that conjugation between the substituent group R and triazolyl unit has a negligible effect on the photophysical properties of the complexes. The inverse rhenium(I) complexes have large Stokes shifts, long metal-to-ligand charge transfer (MLCT) excited state lifetimes, and respectable quantum yields which are relatively solvent insensitive.
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Affiliation(s)
- Warrick K C Lo
- Department of Chemistry, University of Otago , P.O. Box 56, Dunedin 9054, New Zealand
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44
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Preston D, Fox-Charles A, Lo WKC, Crowley JD. Chloride triggered reversible switching from a metallosupramolecular [Pd2L4]4+ cage to a [Pd2L2Cl4] metallo-macrocycle with release of endo- and exo-hedrally bound guests. Chem Commun (Camb) 2015; 51:9042-5. [DOI: 10.1039/c5cc02226f] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A metallosupramolecular [Pd2L4]4+ cage can be cleanly, and reversibly, converted into a [Pd2L2Cl4] metallo-macrocycle upon addition or removal of chloride ions.
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Affiliation(s)
- Dan Preston
- Department of Chemistry
- University of Otago
- Dunedin
- New Zealand
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45
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Symmers PR, Burke MJ, August DP, Thomson PIT, Nichol GS, Warren MR, Campbell CJ, Lusby PJ. Non-equilibrium cobalt(iii) "click" capsules. Chem Sci 2015; 6:756-760. [PMID: 28706638 PMCID: PMC5494537 DOI: 10.1039/c4sc03036b] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Accepted: 10/06/2014] [Indexed: 11/21/2022] Open
Abstract
Cobalt(iii) tetrahedral capsules have been prepared using an assembly-followed-by-oxidation protocol from a cobalt(ii) precursor and a readily derivatizable pyridyl-triazole ligand system. Experiments designed to probe the constitutional dynamics show that these architectures are in a non-equilibrium state. A preliminary investigation into the host-guest chemistry of a water-soluble derivative shows it can bind and differentiate a range of different neutral organic molecules. The stability of this ensemble also permits the study of guest-binding at high salt concentrations.
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Affiliation(s)
- P R Symmers
- EaStCHEM School of Chemistry , University of Edinburgh , The King's Buildings, David Brewster Road , Edinburgh EH9 3FJ , UK .
| | - M J Burke
- EaStCHEM School of Chemistry , University of Edinburgh , The King's Buildings, David Brewster Road , Edinburgh EH9 3FJ , UK .
| | - D P August
- EaStCHEM School of Chemistry , University of Edinburgh , The King's Buildings, David Brewster Road , Edinburgh EH9 3FJ , UK .
| | - P I T Thomson
- EaStCHEM School of Chemistry , University of Edinburgh , The King's Buildings, David Brewster Road , Edinburgh EH9 3FJ , UK .
| | - G S Nichol
- EaStCHEM School of Chemistry , University of Edinburgh , The King's Buildings, David Brewster Road , Edinburgh EH9 3FJ , UK .
| | - M R Warren
- Diamond Light Source Ltd , Diamond House, Harwell Science and Innovation Campus, Didcot , Oxfordshire OX11 0DE , UK
| | - C J Campbell
- EaStCHEM School of Chemistry , University of Edinburgh , The King's Buildings, David Brewster Road , Edinburgh EH9 3FJ , UK .
| | - P J Lusby
- EaStCHEM School of Chemistry , University of Edinburgh , The King's Buildings, David Brewster Road , Edinburgh EH9 3FJ , UK .
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46
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Synthesis, structure, stability and antimicrobial activity of a ruthenium(II) helicate derived from a bis-bidentate “click” pyridyl-1,2,3-triazole ligand. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2014.10.011] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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47
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Wu N, Melan CFC, Stevenson KA, Fleischel O, Guo H, Habib F, Holmberg RJ, Murugesu M, Mosey NJ, Nierengarten H, Petitjean A. Systematic study of the synthesis and coordination of 2-(1,2,3-triazol-4-yl)-pyridine to Fe(ii), Ni(ii) and Zn(ii); ion-induced folding into helicates, mesocates and larger architectures, and application to magnetism and self-selection. Dalton Trans 2015; 44:14991-5005. [DOI: 10.1039/c5dt00233h] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The 2-pyridyl–1,2,3-triazole chelate was found to display unique coordination properties.
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Affiliation(s)
- Nan Wu
- Department of Chemistry
- Queen's University
- Kingston
- Canada
| | | | | | | | - Huan Guo
- Department of Chemistry
- Queen's University
- Kingston
- Canada
| | - Fatemah Habib
- Department of Chemistry
- University of Ottawa
- Ottawa K1N6N5
- Canada
| | | | | | | | - Hélène Nierengarten
- Service de Spectrométrie de masse de l'Institut de Chimie de Strasbourg
- 67000 Strasbourg
- France
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48
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Noor A, Maloney DL, Lewis JEM, Lo WKC, Crowley JD. Acid-Base Driven Ligand Exchange with Palladium(II) “Click” Complexes. ASIAN J ORG CHEM 2014. [DOI: 10.1002/ajoc.201402197] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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49
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Noor A, Huff GS, Kumar SV, Lewis JEM, Paterson BM, Schieber C, Donnelly PS, Brooks HJL, Gordon KC, Moratti SC, Crowley JD. [Re(CO)3]+ Complexes of exo-Functionalized Tridentate “Click” Macrocycles: Synthesis, Stability, Photophysical Properties, Bioconjugation, and Antibacterial Activity. Organometallics 2014. [DOI: 10.1021/om500664v] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
| | | | | | | | - Brett M. Paterson
- School of Chemistry and Bio21 Molecular Science Biotechnology Institute, University of Melbourne, Melbourne 3010, Australia
| | - Christine Schieber
- School of Chemistry and Bio21 Molecular Science Biotechnology Institute, University of Melbourne, Melbourne 3010, Australia
| | - Paul S. Donnelly
- School of Chemistry and Bio21 Molecular Science Biotechnology Institute, University of Melbourne, Melbourne 3010, Australia
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50
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Bodman SE, Fitchett CM. Conformational control of the self-assembly of triple helicates and [2 × 2]-grids from zinc(ii) and 3,6-di(2-pyridyl)pyridazine based ligands. Dalton Trans 2014; 43:12606-13. [DOI: 10.1039/c4dt01416b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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