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Gos M, Cebula J, Goszczyński TM. Metallacarboranes in Medicinal Chemistry: Current Advances and Future Perspectives. J Med Chem 2024; 67:8481-8501. [PMID: 38769934 DOI: 10.1021/acs.jmedchem.4c00157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
Metallacarboranes, exemplified by cobalt bis(dicarbollide) ([COSAN]-), have excelled their historical metallocene analogue label to become promising in drug design, medical studies, and fundamental biological research. Serving as a unique platform for conjugation with biomolecules, they also constitute an auspicious building block for biologically active derivatives and a carrier for cellular transport of membrane-impermeable cargos. Modified [COSAN]- exhibits specific antimicrobial, antiviral, and anticancer actions showing promise for preclinical trials. Contributing to the ongoing development in medicinal chemistry, metallacarboranes offer desirable physicochemical properties and low acute toxicity. This article presents a critical look at metallacarboranes in the context of their application in medicinal chemistry, emphasizing [COSAN]- as a potential game-changer in drug design and biomedical sciences. As medicinal chemistry seeks innovative building blocks, metallacarboranes emerge as an important novelty with versatile solutions and promising implications.
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Affiliation(s)
- Michalina Gos
- Laboratory of Biomedical Chemistry, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114 Wrocław, Poland
| | - Jakub Cebula
- Laboratory of Biomedical Chemistry, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114 Wrocław, Poland
| | - Tomasz M Goszczyński
- Laboratory of Biomedical Chemistry, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114 Wrocław, Poland
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Nekvinda J, Bavol D, Litecká M, Tüzün EZ, Dušek M, Grüner B. Synthetic routes to carbon substituted cobalt bis(dicarbollide) alkyl halides and aromatic amines along with closely related irregular pathways. Dalton Trans 2024; 53:5816-5826. [PMID: 38465373 DOI: 10.1039/d4dt00072b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
Carbon substituted cobalt bis(dicarbollide) alkyl halides [(1-X-(CH2)n-1,2-C2B9H10)(1,2-C2B9H11)-3,3'-Co]Me4N (X = Br, I; n = 1-3) are prepared in high yields (>90%) from their corresponding alcohols without side skeletal substitutions. These species offer access to the synthesis of aromatic cobalt bis(dicarbollide) amines, however only for particular terminal halogen substitution, the propylene pendant arm, and under appropriately controlled reaction conditions. Thus, the compounds substituted at cage carbon atoms with a propylene linker and terminal aromatic amine groups could be prepared. In other cases, numerous irregular reaction pathways occur, undoubtedly as a consequence of the bulky anionic boron cage in close proximity to the reaction site. Among them, an unusual intramolecular hydroboration forming rigidified carbon-to-boron bridged isomeric anions with an asymmetric structure that correspond to formulae [(1,8'-μ-C2H4)-(1,2-C2B9H10)(1',2'-C2B9H10)-3,3'-Co]- and [(1,7'-μ-C2H4)-(1,2-C2B9H10)(1',2'-C2B9H10)-3,3'-Co]- is described herein and the former isomer is structurally characterized. This product with a restrained geometry is widely accessible through nucleophile and/or thermally induced decomposition of (pseudo)halides attached to the cage via an ethylene linker. Surprisingly enough, also doubly bridged isomeric species [(1,8-μ-C2H4-1,2-C2B9H9)2-3,3'-Co]- and [(1,7-μ-C2H4-1,2-C2B9H9)2-3,3'-Co]- are available in good yield using these methods. Furthermore, other more typical side reactions are discussed, i.e. nucleophilic reactions of propyl halides with Me3N formed apparently by disproportionation of Me4N+ at higher temperatures or with pyridine used as a base.
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Affiliation(s)
- Jan Nekvinda
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, Hlavní 1001, Husinec-Řež 25068, Czech Republic.
| | - Dmytro Bavol
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, Hlavní 1001, Husinec-Řež 25068, Czech Republic.
| | - Miroslava Litecká
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, Hlavní 1001, Husinec-Řež 25068, Czech Republic.
| | - Ece Zeynep Tüzün
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, Hlavní 1001, Husinec-Řež 25068, Czech Republic.
| | - Michal Dušek
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, Prague 8, 182 21, Czech Republic
| | - Bohumír Grüner
- Institute of Inorganic Chemistry of the Czech Academy of Sciences, Hlavní 1001, Husinec-Řež 25068, Czech Republic.
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Cebula J, Fink K, Goldeman W, Szermer-Olearnik B, Nasulewicz-Goldeman A, Psurski M, Cuprych M, Kędziora A, Dudek B, Bugla-Płoskońska G, Chaszczewska-Markowska M, Gos M, Migdał P, Goszczyński TM. Structural Patterns Enhancing the Antibacterial Activity of Metallacarborane-Based Antibiotics. J Med Chem 2023; 66:14948-14962. [PMID: 37903296 DOI: 10.1021/acs.jmedchem.3c01516] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2023]
Abstract
Healthcare systems heavily rely on antibiotics to treat bacterial infections, but the widespread presence of multidrug-resistant bacteria puts this strategy in danger. Novel drugs capable of overcoming current resistances are needed if our ability to treat bacterial infections is to be maintained. Boron clusters offer a valuable possibility to create a new class of antibiotics and expand the chemical space of antibiotics beyond conventional carbon-based molecules. In this work, we identified two promising structural patterns providing cobalta bis(dicarbollide)(COSAN)-based compounds with potent and selective activity toward Staphylococcus aureus (including clinical strains): introduction of the α-amino acid amide and addition of iodine directly to the metallacarborane cage. Furthermore, we found that proper hydrophilic-lipophilic balance is crucial for the selective activity of the tested compounds toward S. aureus over mammalian cells. The patterns proposed in this paper can be useful in the development of metallacarborane-based antibiotics with potent antibacterial properties and low cytotoxicity.
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Affiliation(s)
- Jakub Cebula
- Laboratory of Biomedical Chemistry, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114 Wrocław, Poland
| | - Krzysztof Fink
- Laboratory of Biomedical Chemistry, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114 Wrocław, Poland
| | - Waldemar Goldeman
- Department of Organic and Medicinal Chemistry, Faculty of Chemistry, Wrocław University of Science and Technology, 50-370 Wrocław, Poland
| | - Bożena Szermer-Olearnik
- Laboratory of Biomedical Chemistry, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114 Wrocław, Poland
| | - Anna Nasulewicz-Goldeman
- Laboratory of Experimental Anticancer Therapy, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114 Wrocław, Poland
| | - Mateusz Psurski
- Laboratory of Experimental Anticancer Therapy, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114 Wrocław, Poland
| | - Monika Cuprych
- Laboratory of Experimental Anticancer Therapy, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114 Wrocław, Poland
| | - Anna Kędziora
- Department of Microbiology, Faculty of Biological Sciences, University of Wroclaw, 51-148 Wrocław, Poland
| | - Bartłomiej Dudek
- Department of Microbiology, Faculty of Biological Sciences, University of Wroclaw, 51-148 Wrocław, Poland
| | - Gabriela Bugla-Płoskońska
- Department of Microbiology, Faculty of Biological Sciences, University of Wroclaw, 51-148 Wrocław, Poland
| | - Monika Chaszczewska-Markowska
- Laboratory of Clinical Immunogenetics and Pharmacogenetics, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114 Wrocław, Poland
| | - Michalina Gos
- Laboratory of Biomedical Chemistry, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114 Wrocław, Poland
| | - Paweł Migdał
- Department of Microbiology, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114 Wrocław, Poland
| | - Tomasz M Goszczyński
- Laboratory of Biomedical Chemistry, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, 53-114 Wrocław, Poland
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New Aspects of the Synthesis of closo-Dodecaborate Nitrilium Derivatives [B12H11NCR]− (R = n-C3H7, i-C3H7, 4-C6H4CH3, 1-C10H7): Experimental and Theoretical Studies. INORGANICS 2022. [DOI: 10.3390/inorganics10110196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The preparation of novel nitrilium derivatives of closo-dodecaborate anion [B12H11NCR]−, R = n-C3H7, i-C3H7, 4-C6H4CH3, 1-C10H7 is described. Target compounds were obtained in good yields (up to 73%). The synthesis of target borylated nitrilium derivatives was characterised by the simplicity of the chemical apparatus and the absence of the necessity for the purification of desired compounds. The crystal structures of previously obtained [B12H11NCCH3]− and novel [B12H11NCC3H7]− were established with the help of X-ray structure analysis. DFT-analysis of several nitrilium derivatives [B12H11NCR]−, R = CH3, C3H7, 4-CH3C6H4 was carried out. The main peculiarities of the C≡N bond of the exo-polyhedral substituent were revealed in terms of bond lengths, bond orders and atomic charges. The LUMO orbitals of the systems considered were examined for understanding of the electrophilic nature of the nitrilium derivatives of the closo-dodecaborate anion.
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Kubiński K, Masłyk M, Janeczko M, Goldeman W, Nasulewicz-Goldeman A, Psurski M, Martyna A, Boguszewska-Czubara A, Cebula J, Goszczyński TM. Metallacarborane Derivatives as Innovative Anti- Candida albicans Agents. J Med Chem 2022; 65:13935-13945. [PMID: 36217958 DOI: 10.1021/acs.jmedchem.2c01167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Infections caused by Candida species have increased significantly in the past decades and are among the leading causes of morbidity and mortality worldwide, resulting in serious public health problems. Currently, conventional antifungals are often ineffective as Candida spp. have developed growing resistance to systemic drugs. Since inorganic metallacarboranes are known to affect cellular events, new derivatives of these abiotic compounds were tested against Candida albicans. Compounds based on cobalt bis-dicarbollide [COSAN] were studied on Candida albicans strains, including a panel of 100 clinical isolates. The presented data prove that metallacarborane derivatives are effective against clinical isolates of Candida albicans, even those resistant to systemic drugs, and show synergistic potential in combination with amphotericin B, and low toxicity against human cells and Danio rerio embryos. This paper is a consequential step in the investigations of the broad spectrum and valuable future medical applications of metallacarboranes, especially in the fight against drug-resistant pathogens.
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Affiliation(s)
- Konrad Kubiński
- Department of Molecular Biology, The John Paul II Catholic University of Lublin, Konstantynów 1i, 20-708 Lublin, Poland
| | - Maciej Masłyk
- Department of Molecular Biology, The John Paul II Catholic University of Lublin, Konstantynów 1i, 20-708 Lublin, Poland
| | - Monika Janeczko
- Department of Molecular Biology, The John Paul II Catholic University of Lublin, Konstantynów 1i, 20-708 Lublin, Poland
| | - Waldemar Goldeman
- Department of Organic and Medicinal Chemistry, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeze Wyspianskiego 27, 50-370 Wrocław, Poland
| | - Anna Nasulewicz-Goldeman
- Laboratory of Experimental Anticancer Therapy, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Weigla 12, 53-114 Wrocław, Poland
| | - Mateusz Psurski
- Laboratory of Experimental Anticancer Therapy, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Weigla 12, 53-114 Wrocław, Poland
| | - Aleksandra Martyna
- Department of Molecular Biology, The John Paul II Catholic University of Lublin, Konstantynów 1i, 20-708 Lublin, Poland
| | - Anna Boguszewska-Czubara
- Department of Medical Chemistry, Medical University of Lublin, Chodźki 4A Street, 20-093 Lublin, Poland
| | - Jakub Cebula
- Laboratory of Biomedical Chemistry, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Weigla 12, 53-114 Wrocław, Poland
| | - Tomasz M Goszczyński
- Laboratory of Biomedical Chemistry, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Weigla 12, 53-114 Wrocław, Poland
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Druzina AA, Grammatikova NE, Zhidkova OB, Nekrasova NA, Dudarova NV, Kosenko ID, Grin MA, Bregadze VI. Synthesis and Antibacterial Activity Studies of the Conjugates of Curcumin with closo-Dodecaborate and Cobalt Bis(Dicarbollide) Boron Clusters. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27092920. [PMID: 35566270 PMCID: PMC9101702 DOI: 10.3390/molecules27092920] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 04/22/2022] [Accepted: 04/29/2022] [Indexed: 01/26/2023]
Abstract
A series of novel conjugates of cobalt bis(dicarbollide) and closo-dodecaborate with curcumin were synthesized by copper(I)-catalyzed azide-alkyne cycloaddition. These conjugates were tested for antibacterial activity. It was shown that all derivatives are active when exposed to Bacillus cereus ATCC 10702 and are not active against Gram-negative microorganisms and Candida albicans at the maximum studied concentration of 1000 mg/L. The conjugate of alkynyl-curcumin with azide synthesized from the tetrahydropyran derivative of cobalt bis(dicarbollide) exhibited activity against Gram-positive microorganisms: Staphylococcus aureus ATCC 29213, Enterococcus faecalis ATCC 29212 and the clinical isolate MRSA 17, that surpassed curcumin by 2–4 times.
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Affiliation(s)
- Anna A. Druzina
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Str., 119991 Moscow, Russia; (O.B.Z.); (N.A.N.); (N.V.D.); (I.D.K.); (V.I.B.)
- Correspondence: ; Tel.: +7-926-404-5566
| | | | - Olga B. Zhidkova
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Str., 119991 Moscow, Russia; (O.B.Z.); (N.A.N.); (N.V.D.); (I.D.K.); (V.I.B.)
| | - Natalia A. Nekrasova
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Str., 119991 Moscow, Russia; (O.B.Z.); (N.A.N.); (N.V.D.); (I.D.K.); (V.I.B.)
- M.V. Lomonosov Institute of Fine Chemical Technology, MIREA—Russian Technological University, 86 Vernadsky Av., 119571 Moscow, Russia;
| | - Nadezhda V. Dudarova
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Str., 119991 Moscow, Russia; (O.B.Z.); (N.A.N.); (N.V.D.); (I.D.K.); (V.I.B.)
| | - Irina D. Kosenko
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Str., 119991 Moscow, Russia; (O.B.Z.); (N.A.N.); (N.V.D.); (I.D.K.); (V.I.B.)
| | - Mikhail A. Grin
- M.V. Lomonosov Institute of Fine Chemical Technology, MIREA—Russian Technological University, 86 Vernadsky Av., 119571 Moscow, Russia;
| | - Vladimir I. Bregadze
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Str., 119991 Moscow, Russia; (O.B.Z.); (N.A.N.); (N.V.D.); (I.D.K.); (V.I.B.)
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Cobalt Bis-Dicarbollide Enhances Antibiotics Action towards Staphylococcus epidermidis Planktonic Growth Due to Cell Envelopes Disruption. Pharmaceuticals (Basel) 2022; 15:ph15050534. [PMID: 35631360 PMCID: PMC9147877 DOI: 10.3390/ph15050534] [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] [Received: 03/14/2022] [Revised: 04/19/2022] [Accepted: 04/22/2022] [Indexed: 02/01/2023] Open
Abstract
The emergence of antibiotic resistance in opportunistic pathogens represents a huge problem, the solution for which may be a treatment with a combination of multiple antimicrobial agents. Sodium salt of cobalt bis-dicarbollide (COSAN.Na) is one of the very stable, low-toxic, amphiphilic boron-rich sandwich complex heteroboranes. This compound has a wide range of potential applications in the biological sciences due to its antitumor, anti-HIV-1, antimicrobial and antibiofilm activity. Our study confirmed the ability of COSAN.Na (in the concentration range 0.2–2.48 µg/mL) to enhance tetracycline, erythromycin, and vancomycin action towards Staphylococcus epidermidis planktonic growth with an additive or synergistic effect (e.g., the combination of 1.24 µg/mL COSAN.Na and 6.5 µg/mL TET). The effective inhibitory concentration of antibiotics was reduced up to tenfold most efficiently in the case of tetracycline (from 65 to 6.5 µg/mL). In addition, strong effect of COSAN.Na on disruption of the cell envelopes was determined using propidium iodide uptake measurement and further confirmed by transmission electron microscopy. The combination of amphiphilic COSAN.Na with antibiotics can therefore be considered a promising way to overcome antibiotic resistance in Gram-positive cocci.
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Varkhedkar R, Yang F, Dontha R, Zhang J, Liu J, Spingler B, van der Veen S, Duttwyler S. Natural-Product-Directed Catalytic Stereoselective Synthesis of Functionalized Fused Borane Cluster-Oxazoles for the Discovery of Bactericidal Agents. ACS CENTRAL SCIENCE 2022; 8:322-331. [PMID: 35350606 PMCID: PMC8949637 DOI: 10.1021/acscentsci.1c01132] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Indexed: 06/14/2023]
Abstract
The identification of an alternative chemical space in order to address the global challenge posed by emerging antimicrobial resistance is very much needed for the discovery of novel antimicrobial lead compounds. Boron clusters are currently being explored in drug discovery due to their unique steric and electronic properties. However, the challenges associated with the synthesis and derivatization techniques of these compounds have limited their utility in the rapid construction of a library of molecules for screening against various biological targets as an alternative molecular platform. Herein, we report a transition-metal-catalyzed regioselective direct B-H alkylation-annulation of the closo-dodecaborate anion with natural products such as menthol and camphor as the directing groups. This method allowed the rapid construction of a library of 1,2,3-trisubstituted clusters, which were evaluated in terms of their antibacterial activity against WHO priority pathogens. Several of the synthesized dodecaborate derivatives displayed medium- to high-level bactericidal activity against Gram-positive and Gram-negative bacteria.
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Affiliation(s)
- Rajesh Varkhedkar
- Department
of Chemistry, Zhejiang University, 38 Zheda Road, 310027 Hangzhou, People’s
Republic of China
| | - Fan Yang
- Department
of Microbiology, and Department of Dermatology, Sir Run Run Shaw Hospital,
School of Medicine, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, People’s Republic of China
| | - Rakesh Dontha
- Department
of Chemistry, Zhejiang University, 38 Zheda Road, 310027 Hangzhou, People’s
Republic of China
| | - Jianglin Zhang
- Department
of Microbiology, and Department of Dermatology, Sir Run Run Shaw Hospital,
School of Medicine, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, People’s Republic of China
| | - Jiyong Liu
- Department
of Chemistry, Zhejiang University, 38 Zheda Road, 310027 Hangzhou, People’s
Republic of China
| | - Bernhard Spingler
- Department
of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Stijn van der Veen
- Department
of Microbiology, and Department of Dermatology, Sir Run Run Shaw Hospital,
School of Medicine, Zhejiang University, 866 Yuhangtang Road, 310058 Hangzhou, People’s Republic of China
| | - Simon Duttwyler
- Department
of Chemistry, Zhejiang University, 38 Zheda Road, 310027 Hangzhou, People’s
Republic of China
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Fojt L, Grüner B, Nekvinda J, Tűzűn EZ, Havran L, Fojta M. Electrochemistry of Cobalta Bis(dicarbollide) Ions Substituted at Carbon Atoms with Hydrophilic Alkylhydroxy and Carboxy Groups. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27061761. [PMID: 35335124 PMCID: PMC8953506 DOI: 10.3390/molecules27061761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 03/04/2022] [Accepted: 03/06/2022] [Indexed: 11/16/2022]
Abstract
In this study we explore the effect on the electrochemical signals in aqueous buffers of the presence of hydrophilic alkylhydroxy and carboxy groups on the carbon atoms of cobalta bis(dicarbollide) ions. The oxygen-containing exo-skeletal substituents of cobalta bis(dicarbollide) ions belong to the perspective building blocks that are considered for bioconjugation. Carbon substitution provides wider versatility and applicability in terms of the flexibility of possible chemical pathways. However, until recently, the electrochemistry of compounds substituted only on boron atoms could be studied, due to the unavailability of carbon-substituted congeners. In the present study, electrochemistry in aqueous phosphate buffers is considered along with the dependence of electrochemical response on pH and concentration. The compounds used show electrochemical signals around −1.3 and +1.1 V of similar or slightly higher intensities than in the parent cobalta bis(dicarbollide) ion. The signals at positive electrochemical potential correspond to irreversible oxidation of the boron cage (the C2B9 building block) and at negative potential correspond to the reversible redox process of (CoIII/CoII) at the central atom. Although the first signal is typically sharp and its potential can be altered by a number of substituents, the second signal is complex and is composed of three overlapping peaks. This signal shows sigmoidal character at higher concentrations and may be used as a diagnostic tool for aggregation in solution. Surprisingly enough, the observed effects of the site of substitution (boron or carbon) and between individual groups on the electrochemical response were insignificant. Therefore, the substitutions would preserve promising properties of the parent cage for redox labelling, but would not allow for the further tuning of signal position in the electrochemical window.
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Affiliation(s)
- Lukáš Fojt
- Department of Biophysical Chemistry and Molecular Oncology, Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic; (L.H.); (M.F.)
- Correspondence:
| | - Bohumír Grüner
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, Hlavní 1001, 250 68 Řež, Czech Republic; (B.G.); (J.N.); (E.Z.T.)
| | - Jan Nekvinda
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, Hlavní 1001, 250 68 Řež, Czech Republic; (B.G.); (J.N.); (E.Z.T.)
| | - Ece Zeynep Tűzűn
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, Hlavní 1001, 250 68 Řež, Czech Republic; (B.G.); (J.N.); (E.Z.T.)
| | - Luděk Havran
- Department of Biophysical Chemistry and Molecular Oncology, Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic; (L.H.); (M.F.)
| | - Miroslav Fojta
- Department of Biophysical Chemistry and Molecular Oncology, Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic; (L.H.); (M.F.)
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10
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Electrochemistry of Icosahedral Metal Full and Half Sandwich Metallacarboranes in Phosphate Buffers. J Electroanal Chem (Lausanne) 2022. [DOI: 10.1016/j.jelechem.2022.116165] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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12
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Metallacarborane Derivatives Effective against Pseudomonas aeruginosa and Yersinia enterocolitica. Int J Mol Sci 2021; 22:ijms22136762. [PMID: 34201818 PMCID: PMC8267647 DOI: 10.3390/ijms22136762] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 06/17/2021] [Accepted: 06/21/2021] [Indexed: 12/28/2022] Open
Abstract
Pseudomonas aeruginosa is an opportunistic human pathogen that has become a nosocomial health problem worldwide. The pathogen has multiple drug removal and virulence secretion systems, is resistant to many antibiotics, and there is no commercial vaccine against it. Yersinia pestis is a zoonotic pathogen that is on the Select Agents list. The bacterium is the deadliest pathogen known to humans and antibiotic-resistant strains are appearing naturally. There is no commercial vaccine against the pathogen, either. In the current work, novel compounds based on metallacarborane cage were studied on strains of Pseudomonas aeruginosa and a Yersinia pestis substitute, Yersinia enterocolitica. The representative compounds had IC50 values below 10 µM against Y. enterocolitica and values of 20–50 μM against P. aeruginosa. Artificial generation of compound-resistant Y. enterocolitica suggested a common mechanism for drug resistance, the first reported in the literature, and suggested N-linked metallacarboranes as impervious to cellular mechanisms of resistance generation. SEM analysis of the compound-resistant strains showed that the compounds had a predominantly bacteriostatic effect and blocked bacterial cell division in Y. enterocolitica. The compounds could be a starting point towards novel anti-Yersinia drugs and the strategy presented here proposes a mechanism to bypass any future drug resistance in bacteria.
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Abstract
"There's plenty of room at the bottom" (Richard Feynman, 1959): an invitation for (metalla)carboranes to enter the (new) field of nanomedicine. For two decades, the number of publications on boron cluster compounds designed for potential applications in medicine has been constantly increasing. Hundreds of compounds have been screened in vitro or in vivo for a variety of biological activities (chemotherapeutics, radiotherapeutics, antiviral, etc.), and some have shown rather promising potential for further development. However, until now, no boron cluster compounds have made it to the clinic, and even clinical trials have been very sparse. This review introduces a new perspective in the field of medicinal boron chemistry, namely that boron-based drugs should be regarded as nanomedicine platforms, due to their peculiar self-assembly behaviour in aqueous solutions, and treated as such. Examples for boron-based 12- and 11-vertex clusters and appropriate comparative studies from medicinal (in)organic chemistry and nanomedicine, highlighting similarities, differences and gaps in physicochemical and biological characterisation methods, are provided to encourage medicinal boron chemists to fill in the gaps between chemistry laboratory and real applications in living systems by employing bioanalytical and biophysical methods for characterising and controlling the aggregation behaviour of the clusters in solution.
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Affiliation(s)
- Marta Gozzi
- Institute of Inorganic ChemistryFaculty of Chemistry and MineralogyLeipzig UniversityJohannisallee 2904103LeipzigGermany
- Institute of Analytical ChemistryFaculty of Chemistry and MineralogyLeipzig UniversityLinnéstr. 304103LeipzigGermany
- Institute of Medicinal Physics and BiophysicsFaculty of MedicineLeipzig UniversityHärtelstr. 16–1804107LeipzigGermany
| | - Benedikt Schwarze
- Institute of Medicinal Physics and BiophysicsFaculty of MedicineLeipzig UniversityHärtelstr. 16–1804107LeipzigGermany
| | - Evamarie Hey‐Hawkins
- Institute of Inorganic ChemistryFaculty of Chemistry and MineralogyLeipzig UniversityJohannisallee 2904103LeipzigGermany
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14
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Rotational conformation of 8,8′-dihalogenated derivatives of cobalt bis(dicarbollide) in solution. Russ Chem Bull 2021. [DOI: 10.1007/s11172-021-3146-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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15
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16
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Antibiofilm agent pterostilbene is able to enhance antibiotics action against Staphylococcus epidermidis. Microb Pathog 2020; 152:104632. [PMID: 33242645 DOI: 10.1016/j.micpath.2020.104632] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 11/11/2020] [Accepted: 11/12/2020] [Indexed: 02/02/2023]
Abstract
Pterostilbene (PTE) is a naturally occurring compound originally isolated from Pterocarpus spp. It has been widely used in traditional Indian medicine and later discovered to have various beneficial pharmacological effects such as antioxidant properties, hypoglycaemic or antitumor, and antimicrobial activity. This work is focused on demonstrating PTE synergistic effect with erythromycin and tetracycline to reduce their needed effective concentration for suppression of Staphylococcus epidermidis planktonic cells growth and biofilm formation. The secondary aim is to find these combinations effect on the production of its virulence factors. PTE was found to be effective in inhibition of its planktonic cells with MIC80 values 25-37.5 mg l-1. Simultaneously, it decreased the metabolic activity of biofilm cells and was especially effective on a clinical isolate (MBIC80 = 35 mg l-1) in contrast to the conventional antibiotics. In combination, PTE helped the antibiotics to overcome the tolerance of S. epidermidis biofilm cells (5 mg l-1 of each antibiotic with 49 mg l-1 PTE caused more than 85% inhibition of metabolic activity). It permeabilized cytoplasmic membrane of S. epidermidis cells and altered their surface hydrophobicity. Therefore, PTE has a great potential to enhance antibiotics action in the treatment of infections caused by this pathogen.
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17
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El Anwar S, Růžičková Z, Bavol D, Fojt L, Grüner B. Tetrazole Ring Substitution at Carbon and Boron Sites of the Cobalt Bis(dicarbollide) Ion Available via Dipolar Cycloadditions. Inorg Chem 2020; 59:17430-17442. [DOI: 10.1021/acs.inorgchem.0c02719] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Suzan El Anwar
- The Institute of Inorganic Chemistry of the Czech Academy of Sciences, Řež 25068, Czech Republic
| | - Zdeňka Růžičková
- The Department of General and Inorganic Chemistry, Faculty of Chemical Technology, Studentská 573, University of Pardubice, Pardubice 53210, Czech Republic
| | - Dmytro Bavol
- The Institute of Inorganic Chemistry of the Czech Academy of Sciences, Řež 25068, Czech Republic
| | - Lukáš Fojt
- The Institute of Biophysics of the Academy of Sciences of the Czech Republic, v.v.i., Královopolská 135, Brno 61265, Czech Republic
| | - Bohumír Grüner
- The Institute of Inorganic Chemistry of the Czech Academy of Sciences, Řež 25068, Czech Republic
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18
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Grüner B, Kugler M, El Anwar S, Holub J, Nekvinda J, Bavol D, Růžičková Z, Pospíšilová K, Fábry M, Král V, Brynda J, Řezáčová P. Cobalt Bis(dicarbollide) Alkylsulfonamides: Potent and Highly Selective Inhibitors of Tumor Specific Carbonic Anhydrase IX. Chempluschem 2020; 86:352-363. [PMID: 32955786 DOI: 10.1002/cplu.202000574] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 08/26/2020] [Indexed: 11/05/2022]
Abstract
Carbonic anhydrase IX (CAIX) is an enzyme expressed on the surface of cells in hypoxic tumors. It plays a role in regulation of tumor pH and promotes thus tumor cell survival and occurrence of metastases. Here, derivatives of the cobalt bis(dicarbollide)(1-) anion are reported that are based on substitution at the carbon sites of the polyhedra by two alkylsulfonamide groups differing in the length of the aliphatic connector (from C1 to C4, n=1-4), which were prepared by cobalt insertion into the 7-sulfonamidoalkyl-7,8-dicarba-nido-undecaborate ions. Pure meso- and rac-diastereoisomeric forms were isolated. The series is complemented with monosubstituted species (n=2). Synthesis by a direct method furnished similar derivatives (n=2, 3), which are chlorinated at the B(8,8') boron sites. All compounds inhibited CAIX with subnanomolar inhibition constants and showed high selectivity for CAIX. The best inhibitory properties were observed for the compound with n= 3 and two substituents present in rac-arrangement with Ki =20 pM and a selectivity index of 668. X-ray crystallography was used to study interactions of these compounds with the active site of CAIX on the structural level.
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Affiliation(s)
- Bohumír Grüner
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68, Řež, Czech Republic
| | - Michael Kugler
- Institute of Molecular Genetics of the Czech Academy of Sciences, Vídeňská 1083, 142 20, Prague 4, Czech Republic.,Institute of Organic Chemistry and, Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague, Czech Republic
| | - Suzan El Anwar
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68, Řež, Czech Republic
| | - Josef Holub
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68, Řež, Czech Republic
| | - Jan Nekvinda
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68, Řež, Czech Republic
| | - Dmytro Bavol
- Department of Synthesis, Institute of Inorganic Chemistry of the Czech Academy of Sciences, 250 68, Řež, Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, 532 10, Pardubice, Czech Republic
| | - Klára Pospíšilová
- Institute of Organic Chemistry and, Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague, Czech Republic
| | - Milan Fábry
- Institute of Molecular Genetics of the Czech Academy of Sciences, Vídeňská 1083, 142 20, Prague 4, Czech Republic
| | - Vlastimil Král
- Institute of Molecular Genetics of the Czech Academy of Sciences, Vídeňská 1083, 142 20, Prague 4, Czech Republic
| | - Jiří Brynda
- Institute of Molecular Genetics of the Czech Academy of Sciences, Vídeňská 1083, 142 20, Prague 4, Czech Republic
| | - Pavlína Řezáčová
- Institute of Organic Chemistry and, Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 166 10 Prague, Czech Republic
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19
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Romero I, Martinez-Medina M, Camprubí-Font C, Bennour I, Moreno D, Martínez-Martínez L, Teixidor F, Fox MA, Viñas C. Metallacarborane Assemblies as Effective Antimicrobial Agents, Including a Highly Potent Anti-MRSA Agent. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00315] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Isabel Romero
- Departament de Química and Serveis Tècnics de Recerca, Universitat de Girona, C/M. Aurèlia Campmany, 69, E-17003 Girona, Spain
| | - Margarita Martinez-Medina
- Microbiology of the Intestinal Disease group, Department of Biology, Universitat de Girona, 17003 Girona, Spain
| | - Carla Camprubí-Font
- Microbiology of the Intestinal Disease group, Department of Biology, Universitat de Girona, 17003 Girona, Spain
| | - Ines Bennour
- Institut de Ciència de Materials de Barcelona, Consejo Superior de Investigaciones Científicas, Campus Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - David Moreno
- Departament de Química and Serveis Tècnics de Recerca, Universitat de Girona, C/M. Aurèlia Campmany, 69, E-17003 Girona, Spain
| | - Luis Martínez-Martínez
- Unidad de Gestión Clínica de Microbiología, Hospital Universitario Reina Sofía, IMIBIC, Universidad de Cordoba, Cordoba, Spain
| | - Francesc Teixidor
- Institut de Ciència de Materials de Barcelona, Consejo Superior de Investigaciones Científicas, Campus Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
| | - Mark A. Fox
- Chemistry Department, Durham University, South Road, Durham DH1 3LE, U.K
| | - Clara Viñas
- Institut de Ciència de Materials de Barcelona, Consejo Superior de Investigaciones Científicas, Campus Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain
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20
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Bogdanova EV, Stogniy MY, Chekulaeva LA, Anisimov AA, Suponitsky KY, Sivaev IB, Grin MA, Mironov AF, Bregadze VI. Synthesis and reactivity of propionitrilium derivatives of cobalt and iron bis(dicarbollides). NEW J CHEM 2020. [DOI: 10.1039/d0nj03017a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The nucleophilic addition of alcohols and thiols to 8-propionitrilium derivatives of cobalt and iron bis(dicarbollides) gives the corresponding imidates and thioimidates.
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Affiliation(s)
- Ekaterina V. Bogdanova
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russia
- M.V. Lomonosov Institute of Fine Chemical Technology
| | - Marina Yu. Stogniy
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russia
- M.V. Lomonosov Institute of Fine Chemical Technology
| | - Lyubov A. Chekulaeva
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russia
| | - Aleksei A. Anisimov
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russia
- D.I. Mendeleev Russian Chemical Technological University
| | - Kyrill Yu. Suponitsky
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russia
- N.S. Kurnakov Institute of General and Inorganic Chemistry
| | - Igor B. Sivaev
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russia
- G.V. Plekhanov Russian University of Economics
| | - Mikhail A. Grin
- M.V. Lomonosov Institute of Fine Chemical Technology
- MIREA - Russian Technological University
- Moscow
- Russia
| | - Andrey F. Mironov
- M.V. Lomonosov Institute of Fine Chemical Technology
- MIREA - Russian Technological University
- Moscow
- Russia
| | - Vladimir I. Bregadze
- A.N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russia
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21
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Stogniy MY, Kazheva ON, Chudak DM, Shilov GV, Filippov OA, Sivaev IB, Kravchenko AV, Starodub VA, Buravov LI, Bregadze VI, Dyachenko OA. Synthesis and study ofC-substituted methylthio derivatives of cobalt bis(dicarbollide). RSC Adv 2020; 10:2887-2896. [PMID: 35496089 PMCID: PMC9048485 DOI: 10.1039/c9ra08551c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 12/23/2019] [Indexed: 11/21/2022] Open
Abstract
The C-methylthio derivatives of cobalt bis(dicarbollide) were synthesized by reaction of anhydrous CoCl2 with nido-carborane [7-MeS-7,8-C2B9H11]− and isolated as a mixture of rac-[1,1′-(MeS)2-3,3′-Co(1,2-C2B9H10)2]− and meso-[1,2′-(MeS)2-3,3′-Co(1,2-C2B9H10)2]− isomers. The structures of both isomers were studied using DFT quantum chemical calculations. The most preferable geometry of rotamers and the stabilization energy of C-methylthio derivatives of cobalt bis(dicarbolide) were calculated. The (BEDT-TTF)[1,1′-(MeS)2-3,3′-Co(1,2-C2B9H10)2] salt was prepared and its structure was determined by single crystal X-ray diffraction. The cisoid conformation of the rac-[1,1′-(MeS)2-3,3′-Co(1,2-C2B9H10)2]− anion is stabilized by short intramolecular CH⋯S hydrogen and BH⋯S chalcogen bonds between the dicarbollide ligands, that is in good agreement with the data of quantum chemical calculations. The C-methylthio derivatives of cobalt bis(dicarbollide) rac-[1,1′-(MeS)2-3,3′-Co(1,2-C2B9H10)2]− and meso-[1,2′-(MeS)2-3,3′-Co(1,2-C2B9H10)2]− were synthesized and studied by DFT calculations and X-ray diffraction.![]()
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Affiliation(s)
- Marina Yu. Stogniy
- A. N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russia
| | - Olga N. Kazheva
- Institute of Problems of Chemical Physics
- Russian Academy of Sciences
- Moscow Region
- Russia
| | | | - Gennady V. Shilov
- Institute of Problems of Chemical Physics
- Russian Academy of Sciences
- Moscow Region
- Russia
| | - Oleg A. Filippov
- A. N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russia
| | - Igor B. Sivaev
- A. N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russia
| | | | | | - Lev I. Buravov
- Institute of Problems of Chemical Physics
- Russian Academy of Sciences
- Moscow Region
- Russia
| | - Vladimir I. Bregadze
- A. N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russia
| | - Oleg A. Dyachenko
- Institute of Problems of Chemical Physics
- Russian Academy of Sciences
- Moscow Region
- Russia
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