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Pye SJ, Chalker JM, Raston CL. Vortex Fluidic Ethenolysis, Integrating a Rapid Quench of Ruthenium Olefin Metathesis Catalysts. Aust J Chem 2020. [DOI: 10.1071/ch20005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Ruthenium-catalysed ethenolysis occurs in a vortex fluidic device (VFD) – a scalable, thin-film microfluidic continuous flow process. This process takes advantage of the efficient mass transfer of gaseous reagents into the dynamic thin film of liquid. Also reported is the rapid quenching of the ruthenium-based olefin metathesis catalyst by the addition of a saturated solution of N-acetyl-l-cysteine in MeCN, as a convenient alternative to previously reported quenching methods.
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Chatterjee D, van Eldik R. RuIII(EDTA) mediated activation of redox signalling molecules. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.08.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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3
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Sharma R, Pal M, Mishra KK. Ru(III)-catalyzed oxidation of N-acetyl-L-cysteine by methylene blue in absence and in presence of Cu(II) in acidic medium: influence of solvent and morphology. J Sulphur Chem 2016. [DOI: 10.1080/17415993.2016.1163697] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Ranjana Sharma
- Department of Chemistry, Rani Durgavati University, Jabalpur, MP, India
| | - Mahender Pal
- Department of Chemistry, Rani Durgavati University, Jabalpur, MP, India
| | - K. K. Mishra
- Department of Chemistry, Rani Durgavati University, Jabalpur, MP, India
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Śpiewak K, Stochel G, Brindell M. Influence of redox activation of NAMI-A on affinity to serum proteins: transferrin and albumin. J COORD CHEM 2015. [DOI: 10.1080/00958972.2015.1067692] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- K. Śpiewak
- Faculty of Chemistry, Department of Inorganic Chemistry, Jagiellonian University, Krakow, Poland
| | - G. Stochel
- Faculty of Chemistry, Department of Inorganic Chemistry, Jagiellonian University, Krakow, Poland
| | - M. Brindell
- Faculty of Chemistry, Department of Inorganic Chemistry, Jagiellonian University, Krakow, Poland
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Souza ML, Castellano EE, Telser J, Franco DW. Secondary Coordination Sphere Effects in Ruthenium(III) Tetraammine Complexes: Role of the Coordinated Water Molecule. Inorg Chem 2015; 54:2067-80. [DOI: 10.1021/ic5030857] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
| | | | - Joshua Telser
- Department of Biological,
Chemical and Physical Sciences, Roosevelt University, Chicago, Illinois 60605 United States
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Recio FJ, Gutierrez CA, Venegas R, Linares-Flores C, Caro CA, Zagal JH. Optimization of the electrocatalytic activity of MN4-macrocyclics adsorbed on graphite electrodes for the electrochemical oxidation of L-cysteine by tuning the M (II)/(I) formal potential of the catalyst: an overview. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.04.098] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Osti RZ, Serrano FA, Paschoalin T, Massaoka MHS, Travassos LR, Truzzi DR, Rodrigues EG, Franco DW. The In Vitro and In Vivo Antitumour Activities of Nitrosyl Ruthenium Amine Complexes. Aust J Chem 2012. [DOI: 10.1071/ch12245] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Ruthenium compounds of the type trans-[Ru(NO)(NH3)4(L)]X3, L = N-heterocyclic ligands, P(OEt)3, SO32–, X = BF4– or PF6–, or [Ru(NO)Hedta], were tested for antitumour activity in vitro against murine melanoma and human tumour cells. The ruthenium complexes induced DNA fragmentation and morphological alterations suggestive of necrotic tumour cell death. The calculated IC50 values were lower than 100 μM. Complexes for which L = isn or imN were partially effective in vivo in a syngeneic model of murine melanoma B16F10, increasing animal survival. In addition, the same ruthenium complexes effectively inhibited angiogenesis of HUVEC cells in vitro. The results suggest that these nitrosyl complexes are a promising platform to be explored for the development of novel antitumour agents.
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Chatterjee D, Ember E, Pal U, Ghosh S, van Eldik R. Kinetics and mechanism of the [RuIII(edta)(H2O)]−-mediated oxidation of cysteine by H2O2. Dalton Trans 2011; 40:10997-1004. [DOI: 10.1039/c1dt10623f] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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9
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Experimental chemotherapy against Trypanosoma cruzi infection using ruthenium nitric oxide donors. Antimicrob Agents Chemother 2009; 53:4414-21. [PMID: 19581464 DOI: 10.1128/aac.00104-09] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The ruthenium NO donors of the group trans-[Ru(NO)(NH3)4L]n+, where the ligand (L) is N-heterocyclic H2O, SO(3)(2-), or triethyl phosphite, are able to lyse Trypanosoma cruzi in vitro and in vivo. Using half-maximal (50%) inhibitory concentrations against bloodstream trypomastigotes (IC50try) and cytotoxicity data on mammalian V-79 cells (IC50V79), the in vitro therapeutic indices (TIs) (IC50V79/IC50try) for these compounds were calculated. Compounds that exhibited an in vitro TI of > or = 10 and trypanocidal activity against both epimastigotes and trypomastigotes with an IC50(try/epi) of < or = 100 microM were assayed in a mouse model for acute Chagas' disease, using two different routes (intraperitoneal and oral) for drug administration. A dose-effect relationship was observed, and from that, the ideal dose of 400 nmol/kg of body weight for both trans-[Ru(NO)(NH3)4isn](BF4)3 (isn, isonicotinamide) and trans-[Ru(NO)(NH3)4imN](BF4)3 (imN, imidazole) and median (50%) effective doses (ED50) of 86 and 190 nmol/kg, respectively, were then calculated. Since the 50% lethal doses (LD50) for both compounds are higher than 125 micromol/kg, the in vivo TIs (LD50/ED50) of the compounds are 1,453 for trans-[Ru(NO)(NH3)4isn](BF4)3 and 658 for trans-[Ru(NO)(NH3)4imN](BF4)3. Although these compounds exhibit a marked trypanocidal activity and are able to react with cysteine, they exhibit very low activity in T. cruzi-glycosomal glyceraldehyde-3-phosphate dehydrogenase tests, suggesting that this enzyme is not their target. The trans-[Ru(NO)(NH3)4isn](BF4)3 and trans-[Ru(NO)(NH3)4imN](BF4)3 compounds are able to eliminate amastigote nests in myocardium tissue at 400-nmol/kg doses and ensure the survival of all infected mice, thus opening a novel set of therapies to try against trypanosomatids.
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Moore JA, Henry Acquaye J. Crystal structures of [Ru(terpy)(HPB)(H2O)](PF6)2 and [Ru(terpy)(HPB)(2-picoline)](PF6) and the kinetics studies of the aqua ligand substitution by pyridine and substituted pyridines. Polyhedron 2009. [DOI: 10.1016/j.poly.2008.11.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Alencar WS, Crespilho FN, Martins MVA, Zucolotto V, Oliveira, Jr ON, Silva WC. Synergistic interaction between gold nanoparticles and nickel phthalocyanine in layer-by-layer (LbL) films: evidence of constitutional dynamic chemistry (CDC). Phys Chem Chem Phys 2009; 11:5086-91. [DOI: 10.1039/b821915j] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Mishra K, Chaturvedi R. A Kinetic Study of the Ru(III)-Catalysed Oxidation of Glutathione by Methylene Blue in Acidic Medium. PROGRESS IN REACTION KINETICS AND MECHANISM 2008. [DOI: 10.3184/146867808x339322] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Glutathione (GSH, RSH) and Methylene Blue (MB) interact in a mole ratio of 2:1 in acidic medium forming the corresponding disulfide and the leuco base. The reaction shows zero-order kinetics in MB and first-order kinetics in GSH, i.e. the rate is not affected on varying [MB]. The rate shows a fractional dependence on [H+] while there is no influence of variation of ionic strength on the rate of reaction. The rate constant increases linearly on increasing [Ru(III)]. The zero-order rate constant remains unaffected on varying the time of equilibration of the catalyst with the ingredients of the reaction system. The rate is not affected on addition of the disulfide, but addition of the leuco base slightly retards the rate. Activation parameters have been evaluated and a plausible reaction scheme has been proposed by presuming the interaction of transient Ru(II) with protonated MB as the rate limiting step. The kinetic results indicate that the glutamyl tripeptide moiety of GSH inhibits the reactivity of cysteine–SH towards MB in the presence of Ru(III).
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Affiliation(s)
- K.K. Mishra
- Department of Chemistry, Rani Durgavati University, Jabalpur 482001, M.P. India
| | - Ranu Chaturvedi
- Department of Chemistry, Rani Durgavati University, Jabalpur 482001, M.P. India
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Gomes AJ, Barbougli PA, Espreafico EM, Tfouni E. trans-[Ru(NO)(NH3)4(py)](BF4)3·H2O encapsulated in PLGA microparticles for delivery of nitric oxide to B16-F10 cells: Cytotoxicity and phototoxicity. J Inorg Biochem 2008; 102:757-66. [DOI: 10.1016/j.jinorgbio.2007.11.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2007] [Revised: 11/25/2007] [Accepted: 11/27/2007] [Indexed: 10/22/2022]
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Chaturvedi R, Mishra KK. Ru(III)-catalyzed oxidation of cysteine hydrochloride by methylene blue in acidic medium; synergetic effect of Cu(II): A kinetic study. INT J CHEM KINET 2008. [DOI: 10.1002/kin.20292] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Zanichelli PG, Estrela HFG, Spadari-Bratfisch RC, Grassi-Kassisse DM, Franco DW. The effects of ruthenium tetraammine compounds on vascular smooth muscle. Nitric Oxide 2007; 16:189-96. [PMID: 17123848 DOI: 10.1016/j.niox.2006.10.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2006] [Revised: 09/13/2006] [Accepted: 10/03/2006] [Indexed: 11/17/2022]
Abstract
The time course of the relaxation effect induced by a single dose (3 x 10(-6) mol/L) of trans-[Ru(NH3)4L(NO)]3+ (L=nic, 4-pic, py, imN, P(OEt)3, SO(3)(2-), NH3, and pz) species and sodium nitroprusside (4 x 10(-9) mol/L) was studied in aortic rings without endothelium and pre-contracted with noradrenaline (1 x 10(-6) mol/L). All the compounds induced a relaxing effect in the aortic rings, but the intensity and time of relaxation were different. Only the species where L=py, 4-pic, and P(OEt)3 were able to induce 100% (99-100%) of the relaxing effect during the assay. trans-[Ru(NH3)4(L)(NO)]3+ (L=SO(3)(2-) and NH3) showed the lowest relaxing effect (36 and 37%, respectively) when compared with the other compounds. Relationship was observed between the time corresponding to half of the maximum relaxation intensity observed and, respectively, k-NO, E0'[Ru(NO)]3+/[Ru(NO)]2+ in trans-[Ru(NH3)4(L)(NO)]3+ species and E0'Ru(III)/Ru(II) in trans-[Ru(NH3)4(L)(H2O)]3+ ions. These relationships strongly suggested that the NO liberation from the reduced nitrosyl complexes was responsible for the observed relaxation.
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Affiliation(s)
- P G Zanichelli
- Departamento de Química Inorgânica, Instituto de Química de São Carlos, Universidade de São Paulo, São Carlos, SP, Brazil
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