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Dantignana V, Pérez-Segura MC, Besalú-Sala P, Delgado-Pinar E, Martínez-Camarena Á, Serrano-Plana J, Álvarez-Núñez A, Castillo CE, García-España E, Luis JM, Basallote MG, Costas M, Company A. Characterization of a Ferryl Flip in Electronically Tuned Nonheme Complexes. Consequences in Hydrogen Atom Transfer Reactivity. Angew Chem Int Ed Engl 2023; 62:e202211361. [PMID: 36305539 PMCID: PMC10107328 DOI: 10.1002/anie.202211361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Indexed: 12/04/2022]
Abstract
Two oxoiron(IV) isomers (R 2a and R 2b) of general formula [FeIV (O)(R PyNMe3 )(CH3 CN)]2+ are obtained by reaction of their iron(II) precursor with NBu4 IO4 . The two isomers differ in the position of the oxo ligand, cis and trans to the pyridine donor. The mechanism of isomerization between R 2a and R 2b has been determined by kinetic and computational analyses uncovering an unprecedented path for interconversion of geometrical oxoiron(IV) isomers. The activity of the two oxoiron(IV) isomers in hydrogen atom transfer (HAT) reactions shows that R 2a reacts one order of magnitude faster than R 2b, which is explained by a repulsive noncovalent interaction between the ligand and the substrate in R 2b. Interestingly, the electronic properties of the R substituent in the ligand pyridine ring do not have a significant effect on reaction rates. Overall, the intrinsic structural aspects of each isomer define their relative HAT reactivity, overcoming changes in electronic properties of the ligand.
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Affiliation(s)
- Valeria Dantignana
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, C/Mª Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain
| | - M Carmen Pérez-Segura
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Instituto de Biomoléculas (INBIO), Universidad de Cádiz, Puerto Real, 11510, Cádiz, Spain
| | - Pau Besalú-Sala
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, C/Mª Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain
| | - Estefanía Delgado-Pinar
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán, Paterna, 46980, Valencia 2, Spain
| | - Álvaro Martínez-Camarena
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán, Paterna, 46980, Valencia 2, Spain
| | - Joan Serrano-Plana
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, C/Mª Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain
| | - Andrea Álvarez-Núñez
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, C/Mª Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain
| | - Carmen E Castillo
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Instituto de Biomoléculas (INBIO), Universidad de Cádiz, Puerto Real, 11510, Cádiz, Spain
| | - Enrique García-España
- Departamento de Química Inorgánica, Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático José Beltrán, Paterna, 46980, Valencia 2, Spain
| | - Josep M Luis
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, C/Mª Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain
| | - Manuel G Basallote
- Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Instituto de Biomoléculas (INBIO), Universidad de Cádiz, Puerto Real, 11510, Cádiz, Spain
| | - Miquel Costas
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, C/Mª Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain
| | - Anna Company
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, C/Mª Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain
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Dantignana V, Pérez-Segura MC, Besalú-Sala P, Delgado-Pinar E, Martínez-Camarena Á, Serrano-Plana J, Álvarez-Núñez A, Castillo CE, García-España E, Luis JM, Basallote MG, Costas M, Company A. Characterization of a Ferryl Flip in Electronically Tuned Nonheme Complexes. Consequences in Hydrogen Atom Transfer Reactivity. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202211361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - M. Carmen Pérez-Segura
- Universidad de Cadiz Departamento de Ciencia de los Materials e Ingeniería Metalúrgia y Química Inorgánica SPAIN
| | | | | | | | | | | | - Carmen E Castillo
- Universidad de Cadiz Departamento de Ciencia de los Materials e Ingeniería Metalúrgia y Química Inorgánica SPAIN
| | | | | | - Manuel G. Basallote
- Universidad de Cadiz Departamento de Ciencia de los Materials e Ingeniería Metalúrgia y Química Inorgánica SPAIN
| | | | - Anna Company
- Universitat de Girona Departament de Química Facultat de CiènciesAv. Montilivi s/n 17071 Girona SPAIN
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3
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Magallon C, Griego L, Hu CH, Company A, Ribas X, Mirica LM. Organometallic Ni(II), Ni(III), and Ni(IV) Complexes Relevant to Carbon-Carbon and Carbon-Oxygen Bond Formation Reactions. Inorg Chem Front 2022. [DOI: 10.1039/d1qi01486b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and spectroscopic and structural characterization of well-defined organometallic Ni(II) and Ni(III) complexes bearing the PyNMe3 ligand - a tetradentate N-based macrocyclic ligand which coordinates to the metal center...
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Affiliation(s)
- Miquel Costas
- Institut de Química Computacional i Catàlisi (IQCC) Universitat de Girona C/Mª Aurèlia Capmany 69 17003 Girona Catalonia Spain
| | - Anna Company
- Institut de Química Computacional i Catàlisi (IQCC) Universitat de Girona C/Mª Aurèlia Capmany 69 17003 Girona Catalonia Spain
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Abstract
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Herein
we explore the intrinsic organometallic reactivity of iron
embedded in a tetradentate N3C macrocyclic ligand scaffold
that allows the stabilization of aryl-Fe species, which are key intermediates
in Fe-catalyzed cross-coupling and C–H functionalization processes.
This study covers C–H activation reactions using MeLH and FeCl2, biaryl C–C coupling product formation through reaction
with Grignard reagents, and cross-coupling reactions using MeLBr or HLBr in combination
with Fe0(CO)5. Synthesis under light irradiation
and moderate heating (50 °C) affords the aryl-FeII complexes [FeII(Br)(MeL)(CO)] (1Me) and [FeII(HL)(CO)2]Br (1H). Exhaustive spectroscopic characterization
of these rare low-spin diamagnetic species, including their crystal
structures, allowed the investigation of their intrinsic reactivity.
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Affiliation(s)
- Carla Magallón
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Girona E-17003, Catalonia, Spain
| | - Oriol Planas
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Girona E-17003, Catalonia, Spain
| | - Steven Roldán-Gómez
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Girona E-17003, Catalonia, Spain
| | - Josep M. Luis
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Girona E-17003, Catalonia, Spain
| | - Anna Company
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Girona E-17003, Catalonia, Spain
| | - Xavi Ribas
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Girona E-17003, Catalonia, Spain
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Besalú-Sala P, Magallón C, Costas M, Company A, Luis JM. Mechanistic Insights into the ortho-Defluorination-Hydroxylation of 2-Halophenolates Promoted by a Bis(μ-oxo)dicopper(III) Complex. Inorg Chem 2020; 59:17018-17027. [PMID: 33156988 DOI: 10.1021/acs.inorgchem.0c02246] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
C-F bonds are one of the most inert functionalities. Nevertheless, some [Cu2O2]2+ species are able to defluorinate-hydroxylate ortho-fluorophenolates in a chemoselective manner over other ortho-halophenolates. Albeit it is known that such reactivity is promoted by an electrophilic attack of a [Cu2O2]2+ core over the arene ring, the crucial details of the mechanism that explain the chemo- and regioselectivity of the reaction remain unknown, and it has not being determined either if CuII2(η2:η2-O2) or CuIII2(μ-O)2 species are responsible for the initial attack on the arene. Herein, we present a combined theoretical and experimental mechanistic study to unravel the origin of the chemoselectivity of the ortho-defluorination-hydroxylation of 2-halophenolates by the [Cu2(O)2(DBED)2]2+ complex (DBED = N,N'-di-tert-butylethylenediamine). Our results show that the equilibria between (side-on)peroxo (P) and bis(μ-oxo) (O) isomers plays a key role in the mechanism, with the latter being the reactive species. Furthermore, on the basis of quantum-mechanical calculations, we were able to rationalize the chemoselective preference of the [Cu2(O)2(DBED)2]2+ catalyst for the C-F activation over C-Cl and C-H activations.
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Affiliation(s)
- Pau Besalú-Sala
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Carla Magallón
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Miquel Costas
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Anna Company
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Josep M Luis
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, C/Maria Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
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Sánchez-Eguía BN, Serrano-Plana J, Company A, Costas M. Catalytic O 2 activation with synthetic models of α-ketoglutarate dependent oxygenases. Chem Commun (Camb) 2020; 56:14369-14372. [PMID: 33150337 DOI: 10.1039/d0cc05942k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An iron complex bearing the facially capping tridentate 1,4,7-triazacyclononane ligand mimics structural and functional features of alpha-ketoglutarate (α-KG) dependent enzymes, and engages in enzyme-like catalytic O2 activation coupled to α-ketoacid decarboxylation, oxygenating sulfides. This system constitutes a rare case of non-enzymatic catalytic O2 activation, cycling between FeII and FeIV(O).
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Affiliation(s)
- Brenda N Sánchez-Eguía
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Universitat de Girona. Facultat de Ciències, Campus de Montilivi, 17003, Girona, Spain.
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Neira AC, Martínez-Alanis PR, Aullón G, Flores-Alamo M, Zerón P, Company A, Chen J, Kasper JB, Browne WR, Nordlander E, Castillo I. Correction to "Oxidative Cleavage of Cellobiose by Lytic Polysaccharide Monooxygenase (LPMO)-Inspired Copper Complexes". ACS Omega 2020; 5:28403. [PMID: 33163824 PMCID: PMC7643330 DOI: 10.1021/acsomega.0c04910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Indexed: 06/11/2023]
Abstract
[This corrects the article DOI: 10.1021/acsomega.9b00785.].
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Abstract
Catalytic oxidation of primary C–H bonds of alkanes with a series of iron and manganese catalysts is investigated. Products resulting from oxidation of methylenic sites are observed when hexane (S1) is used as model substrate, while corresponding primary C–H bonds
remain unreactive. However, by using 2,2,3,3-tetramethylbutane (S2) as model substrate, which only contains primary alkyl C–H bonds, oxidation takes place catalytically using a combination of hydrogen peroxide, a manganese catalyst and acetic acid as co-catalyst, albeit with modest
yields (up to 4.4 TON). Complexes bearing tetradentate aminopyridine ligands provide the best yields, while a related pentadentate ligand provides smaller product yields. The chemoselectivity of the reaction is solvent dependent. Carboxylic acid 2b is observed as major product when
the reaction takes place in acetonitrile, because of the facile overoxidation of the first formed alcohol product 2a. Instead the corresponding primary alcohol 2a becomes dominant in reactions performed in 2,2,2-trifluoroethanol (TFE). Polarity reversal of the hydroxyl moiety
arising from the strong hydrogen bond donor ability of the latter solvent accounts for the unusual product chemoselectivity of the reaction. The significance of the current results in the context of light alkane oxidation is discussed.
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Affiliation(s)
- Valeria Dantignana
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química Universitat de Girona C/M. Aurèlia Capmany 69 17003 Girona, Catalonia Spain
| | - Anna Company
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química Universitat de Girona C/M. Aurèlia Capmany 69 17003 Girona, Catalonia Spain
| | - Miquel Costas
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química Universitat de Girona C/M. Aurèlia Capmany 69 17003 Girona, Catalonia Spain
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11
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Chu M, Planas O, Company A, Ribas X, Hamilton A, Whiteoak CJ. Unravelling the mechanism of cobalt-catalysed remote C-H nitration of 8-aminoquinolinamides and expansion of substrate scope towards 1-naphthylpicolinamide. Chem Sci 2020; 11:534-542. [PMID: 32190273 PMCID: PMC7067239 DOI: 10.1039/c9sc05076k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 11/16/2019] [Indexed: 11/21/2022] Open
Abstract
Previously, an unexpected Co-catalysed remote C-H nitration of 8-aminoquinolinamide compounds was developed. This report provided a novel reactivity for Co which was assumed to proceed through the mechanistic pathway already known for analogous Cu-catalysed remote couplings of the same substrates. In order to shed light into this intriguing, and previously unobserved reactivity for Co, a thorough computational study has now been performed, which has allowed for a full understanding of the operative mechanism. This study demonstrates that the Co-catalysed remote coupling does not occur through the previously proposed Single Electron Transfer (SET) mechanism, but actually operates through a high-spin induced remote radical coupling mechanism, through a key intermediate with significant proportion of spin density at the 5- and 7-positions of the aminoquinoline ring. Additionally, new experimental data provides expansion of the synthetic utility of the original nitration procedure towards 1-naphthylpicolinamide which unexpectedly appears to operate via a subtly different mechanism despite having a similar chelate environment.
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Affiliation(s)
- Melody Chu
- Department of Biosciences and Chemistry , Sheffield Hallam University , Sheffield , S1 1WB , UK . ;
| | - Oriol Planas
- Departament de Química , Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT) , Institut de Química Computacional i Catàlisi (IQCC) , Universitat de Girona , Campus de Montilivi , 17071 Girona , Catalonia , Spain
| | - Anna Company
- Departament de Química , Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT) , Institut de Química Computacional i Catàlisi (IQCC) , Universitat de Girona , Campus de Montilivi , 17071 Girona , Catalonia , Spain
| | - Xavi Ribas
- Departament de Química , Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT) , Institut de Química Computacional i Catàlisi (IQCC) , Universitat de Girona , Campus de Montilivi , 17071 Girona , Catalonia , Spain
| | - Alex Hamilton
- Department of Biosciences and Chemistry , Sheffield Hallam University , Sheffield , S1 1WB , UK . ;
| | - Christopher J Whiteoak
- Department of Biosciences and Chemistry , Sheffield Hallam University , Sheffield , S1 1WB , UK . ;
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Dantignana V, Serrano-Plana J, Draksharapu A, Magallón C, Banerjee S, Fan R, Gamba I, Guo Y, Que L, Costas M, Company A. Spectroscopic and Reactivity Comparisons between Nonheme Oxoiron(IV) and Oxoiron(V) Species Bearing the Same Ancillary Ligand. J Am Chem Soc 2019; 141:15078-15091. [PMID: 31469954 DOI: 10.1021/jacs.9b05758] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This work directly compares the spectroscopic and reactivity properties of an oxoiron(IV) and an oxoiron(V) complex that are supported by the same neutral tetradentate N-based PyNMe3 ligand. A complete spectroscopic characterization of the oxoiron(IV) species (2) reveals that this compound exists as a mixture of two isomers. The reactivity of the thermodynamically more stable oxoiron(IV) isomer (2b) is directly compared to that exhibited by the previously reported 1e--oxidized analogue [FeV(O)(OAc)(PyNMe3)]2+ (3). Our data indicates that 2b is 4 to 5 orders of magnitude slower than 3 in hydrogen atom transfer (HAT) from C-H bonds. The origin of this huge difference lies in the strength of the O-H bond formed after HAT by the oxoiron unit, the O-H bond derived from 3 being about 20 kcal·mol-1 stronger than that from 2b. The estimated bond strength of the FeIVO-H bond of 100 kcal·mol-1 is very close to the reported values for highly active synthetic models of compound I of cytochrome P450. In addition, this comparative study provides direct experimental evidence that the lifetime of the carbon-centered radical that forms after the initial HAT by the high valent oxoiron complex depends on the oxidation state of the nascent Fe-OH complex. Complex 2b generates long-lived carbon-centered radicals that freely diffuse in solution, while 3 generates short-lived caged radicals that rapidly form product C-OH bonds, so only 3 engages in stereoretentive hydroxylation reactions. Thus, the oxidation state of the iron center modulates not only the rate of HAT but also the rate of ligand rebound.
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Affiliation(s)
- Valeria Dantignana
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química , Universitat de Girona , C/M. Aurèlia Capmany 69 , 17003 Girona , Catalonia , Spain
| | - Joan Serrano-Plana
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química , Universitat de Girona , C/M. Aurèlia Capmany 69 , 17003 Girona , Catalonia , Spain
| | - Apparao Draksharapu
- Department of Chemistry and Center for Metals in Biocatalysis , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| | - Carla Magallón
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química , Universitat de Girona , C/M. Aurèlia Capmany 69 , 17003 Girona , Catalonia , Spain
| | - Saikat Banerjee
- Department of Chemistry and Center for Metals in Biocatalysis , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| | - Ruixi Fan
- Department of Chemistry , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213 , United States
| | - Ilaria Gamba
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química , Universitat de Girona , C/M. Aurèlia Capmany 69 , 17003 Girona , Catalonia , Spain
| | - Yisong Guo
- Department of Chemistry , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213 , United States
| | - Lawrence Que
- Department of Chemistry and Center for Metals in Biocatalysis , University of Minnesota , Minneapolis , Minnesota 55455 , United States
| | - Miquel Costas
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química , Universitat de Girona , C/M. Aurèlia Capmany 69 , 17003 Girona , Catalonia , Spain
| | - Anna Company
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química , Universitat de Girona , C/M. Aurèlia Capmany 69 , 17003 Girona , Catalonia , Spain
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13
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Neira A, Martínez-Alanis PR, Aullón G, Flores-Alamo M, Zerón P, Company A, Chen J, Kasper JB, Browne WR, Nordlander E, Castillo I. Oxidative Cleavage of Cellobiose by Lytic Polysaccharide Monooxygenase (LPMO)-Inspired Copper Complexes. ACS Omega 2019; 4:10729-10740. [PMID: 31460171 PMCID: PMC6648734 DOI: 10.1021/acsomega.9b00785] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 06/06/2019] [Indexed: 06/10/2023]
Abstract
The potentially tridentate ligand bis[(1-methyl-2-benzimidazolyl)ethyl]amine (2BB) was employed to prepare copper complexes [(2BB)CuI]OTf and [(2BB)CuII(H2O)2](OTf)2 as bioinspired models of lytic polysaccharide copper-dependent monooxygenase (LPMO) enzymes. Solid-state characterization of [(2BB)CuI]OTf revealed a Cu(I) center with a T-shaped coordination environment and metric parameters in the range of those observed in reduced LPMOs. Solution characterization of [(2BB)CuII(H2O)2](OTf)2 indicates that [(2BB)CuII(H2O)2]2+ is the main species from pH 4 to 7.5; above pH 7.5, the hydroxo-bridged species [{(2BB)CuII(H2O) x }2(μ-OH)2]2+ is also present, on the basis of cyclic voltammetry and mass spectrometry. These observations imply that deprotonation of the central amine of Cu(II)-coordinated 2BB is precluded, and by extension, amine deprotonation in the histidine brace of LPMOs appears unlikely at neutral pH. The complexes [(2BB)CuI]OTf and [(2BB)CuII(H2O)2](OTf)2 act as precursors for the oxidative degradation of cellobiose as a cellulose model substrate. Spectroscopic and reactivity studies indicate that a dicopper(II) side-on peroxide complex generated from [(2BB)CuI]OTf/O2 or [(2BB)CuII(H2O)2](OTf)2/H2O2/NEt3 oxidizes cellobiose both in acetonitrile and aqueous phosphate buffer solutions, as evidenced from product analysis by high-performance liquid chromatography-mass spectrometry. The mixture of [(2BB)CuII(H2O)2](OTf)2/H2O2/NEt3 results in more extensive cellobiose degradation. Likewise, the use of both [(2BB)CuI]OTf and [(2BB)CuII(H2O)2](OTf)2 with KO2 afforded cellobiose oxidation products. In all cases, a common Cu(II) complex formulated as [(2BB)CuII(OH)(H2O)]+ was detected by mass spectrometry as the final form of the complex.
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Affiliation(s)
- Andrea.
C. Neira
- Instituto
de Química and Facultad de Química, División
de Estudios de Posgrado, Universidad Nacional
Autónoma de México, Circuito Exterior, CU, 04510 Ciudad de
México, México
| | - Paulina R. Martínez-Alanis
- Departament
de Química Inorgànica i Orgànica and Institut
de Química Teòrica i Computacional, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Gabriel Aullón
- Departament
de Química Inorgànica i Orgànica and Institut
de Química Teòrica i Computacional, Universitat de Barcelona, Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Marcos Flores-Alamo
- Instituto
de Química and Facultad de Química, División
de Estudios de Posgrado, Universidad Nacional
Autónoma de México, Circuito Exterior, CU, 04510 Ciudad de
México, México
| | - Paulino Zerón
- Instituto
de Química and Facultad de Química, División
de Estudios de Posgrado, Universidad Nacional
Autónoma de México, Circuito Exterior, CU, 04510 Ciudad de
México, México
| | - Anna Company
- Institut
de Química Computacional i Catàlisi (IQCC), Departament
de Química, Universitat de Girona, C/ M. Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Juan Chen
- Molecular
Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of
Science and Health, University of Groningen, Nijenborgh 4, 9747AG Groningen, The Netherlands
| | - Johann B. Kasper
- Molecular
Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of
Science and Health, University of Groningen, Nijenborgh 4, 9747AG Groningen, The Netherlands
| | - Wesley R. Browne
- Molecular
Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of
Science and Health, University of Groningen, Nijenborgh 4, 9747AG Groningen, The Netherlands
| | - Ebbe Nordlander
- Chemical
Physics, Department of Chemistry, Lund University, Box 124, SE-221 00 Lund, Sweden
| | - Ivan Castillo
- Instituto
de Química and Facultad de Química, División
de Estudios de Posgrado, Universidad Nacional
Autónoma de México, Circuito Exterior, CU, 04510 Ciudad de
México, México
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14
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Urbanová K, Ramírez-Macías I, Martín-Escolano R, Rosales MJ, Cussó O, Serrano J, Company A, Sánchez-Moreno M, Costas M, Ribas X, Marín C. Effective Tetradentate Compound Complexes against Leishmania spp. that Act on Critical Enzymatic Pathways of These Parasites. Molecules 2018; 24:molecules24010134. [PMID: 30602705 PMCID: PMC6337631 DOI: 10.3390/molecules24010134] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2018] [Revised: 12/18/2018] [Accepted: 12/21/2018] [Indexed: 12/01/2022] Open
Abstract
The spectrum and efficacy of available antileishmanial drugs is limited. In the present work we evaluated in vitro the antiproliferative activity of 11 compounds based on tetradentate polyamines compounds against three Leishmania species (L. braziliensis, L. donovani and L. infantum) and the possible mechanism of action. We identified six compounds (3, 5, 6, 7, 8 and 10) effective against all three Leishmania spp both on extracellular and intracellular forms. These six most active leishmanicidal compounds also prevent the infection of host cells. Nevertheless, only compound 7 is targeted against the Leishmania SOD. Meanwhile, on the glucose metabolism the tested compounds have a species-specific effect on Leishmania spp.: L. braziliensis was affected mainly by 10 and 8, L. donovani by 7, and L. infantum by 5 and 3. Finally, the cellular ultrastructure was mainly damaged by 11 in the three Leishmania spp. studied. These identified antileishmania candidates constitute a good alternative treatment and will be further studied.
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Affiliation(s)
- Kristína Urbanová
- Department of Parasitology, Instituto de Investigación Biosanitaria (ibs. Granada), Hospitales Universitarios de Granada/University of Granada, Severo Ochoa s/n, E-18071 Granada, Spain.
| | - Inmaculada Ramírez-Macías
- Department of Parasitology, Instituto de Investigación Biosanitaria (ibs. Granada), Hospitales Universitarios de Granada/University of Granada, Severo Ochoa s/n, E-18071 Granada, Spain.
| | - Rubén Martín-Escolano
- Department of Parasitology, Instituto de Investigación Biosanitaria (ibs. Granada), Hospitales Universitarios de Granada/University of Granada, Severo Ochoa s/n, E-18071 Granada, Spain.
| | - María José Rosales
- Department of Parasitology, Instituto de Investigación Biosanitaria (ibs. Granada), Hospitales Universitarios de Granada/University of Granada, Severo Ochoa s/n, E-18071 Granada, Spain.
| | - Olaf Cussó
- QBIS-CAT Research Group, Institut de Química Computacional i Catàlisi (IQCC), and Departament de Química, Universitat de Girona. Campus de Montilivi, E-17071 Girona, Spain.
| | - Joan Serrano
- QBIS-CAT Research Group, Institut de Química Computacional i Catàlisi (IQCC), and Departament de Química, Universitat de Girona. Campus de Montilivi, E-17071 Girona, Spain.
| | - Anna Company
- QBIS-CAT Research Group, Institut de Química Computacional i Catàlisi (IQCC), and Departament de Química, Universitat de Girona. Campus de Montilivi, E-17071 Girona, Spain.
| | - Manuel Sánchez-Moreno
- Department of Parasitology, Instituto de Investigación Biosanitaria (ibs. Granada), Hospitales Universitarios de Granada/University of Granada, Severo Ochoa s/n, E-18071 Granada, Spain.
| | - Miquel Costas
- QBIS-CAT Research Group, Institut de Química Computacional i Catàlisi (IQCC), and Departament de Química, Universitat de Girona. Campus de Montilivi, E-17071 Girona, Spain.
| | - Xavi Ribas
- QBIS-CAT Research Group, Institut de Química Computacional i Catàlisi (IQCC), and Departament de Química, Universitat de Girona. Campus de Montilivi, E-17071 Girona, Spain.
| | - Clotilde Marín
- Department of Parasitology, Instituto de Investigación Biosanitaria (ibs. Granada), Hospitales Universitarios de Granada/University of Granada, Severo Ochoa s/n, E-18071 Granada, Spain.
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15
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Magallón C, Serrano-Plana J, Roldán-Gómez S, Ribas X, Costas M, Company A. Preparation of a coordinatively saturated μ-η2:η2-peroxodicopper(II) compound. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.08.061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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16
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Planas O, Roldán-Gómez S, Martin-Diaconescu V, Luis JM, Company A, Ribas X. Mechanistic insights into the S N2-type reactivity of aryl-Co(iii) masked-carbenes for C-C bond forming transformations. Chem Sci 2018; 9:5736-5746. [PMID: 30079183 PMCID: PMC6050605 DOI: 10.1039/c8sc00851e] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 05/28/2018] [Indexed: 12/14/2022] Open
Abstract
Herein we describe the synthesis and characterization of a family of C-metalated aryl-Co(iii) enolates, which can be considered as masked-carbenes, using diazoacetates as coupling partners. These species have been proved to be necessary intermediates in the C(sp2)-C(sp3) bond forming event to obtain cyclic amides, taming the elusive Co(iii)-carbene species. The scope of diazoacetates has been exhaustively examined, varying the nature of the ester and the α-substitution, and a clear preference for electron-poor carbene precursors is observed. Exhaustive experimental and theoretical studies indicate that an unprecedented intramolecular SN2-type process governs the formation of the newly formed C-C bond. Furthermore, the key role of several Lewis acids as carboxylate-activating reagents is further explored by DFT calculations.
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Affiliation(s)
- O Planas
- Institut de Química Computacional i Catàlisi (IQCC) , Departament de Química , Universitat de Girona , Campus Montilivi , Girona , E-17003 , Catalonia , Spain . ;
| | - S Roldán-Gómez
- Institut de Química Computacional i Catàlisi (IQCC) , Departament de Química , Universitat de Girona , Campus Montilivi , Girona , E-17003 , Catalonia , Spain . ;
| | - V Martin-Diaconescu
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Avinguda Països Catalans 16 , 43007 Tarragona , Catalonia , Spain
| | - J M Luis
- Institut de Química Computacional i Catàlisi (IQCC) , Departament de Química , Universitat de Girona , Campus Montilivi , Girona , E-17003 , Catalonia , Spain . ;
| | - A Company
- Institut de Química Computacional i Catàlisi (IQCC) , Departament de Química , Universitat de Girona , Campus Montilivi , Girona , E-17003 , Catalonia , Spain . ;
| | - X Ribas
- Institut de Química Computacional i Catàlisi (IQCC) , Departament de Química , Universitat de Girona , Campus Montilivi , Girona , E-17003 , Catalonia , Spain . ;
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17
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Fan R, Serrano-Plana J, Oloo WN, Draksharapu A, Delgado-Pinar E, Company A, Martin-Diaconescu V, Borrell M, Lloret-Fillol J, García-España E, Guo Y, Bominaar EL, Que L, Costas M, Münck E. Spectroscopic and DFT Characterization of a Highly Reactive Nonheme Fe V-Oxo Intermediate. J Am Chem Soc 2018; 140:3916-3928. [PMID: 29463085 DOI: 10.1021/jacs.7b11400] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The reaction of [(PyNMe3)FeII(CF3SO3)2], 1, with excess peracetic acid at -40 °C generates a highly reactive intermediate, 2b(PAA), that has the fastest rate to date for oxidizing cyclohexane by a nonheme iron species. It exhibits an intense 490 nm chromophore associated with an S = 1/2 EPR signal having g-values at 2.07, 2.01, and 1.94. This species was shown to be in a fast equilibrium with a second S = 1/2 species, 2a(PAA), assigned to a low-spin acylperoxoiron(III) center. Unfortunately, contaminants accompanying the 2(PAA) samples prevented determination of the iron oxidation state by Mössbauer spectroscopy. Use of MeO-PyNMe3 (an electron-enriched version of PyNMe3) and cyclohexyl peroxycarboxylic acid as oxidant affords intermediate 3b(CPCA) with a Mössbauer isomer shift δ = -0.08 mm/s that indicates an iron(V) oxidation state. Analysis of the Mössbauer and EPR spectra, combined with DFT studies, demonstrates that the electronic ground state of 3b(CPCA) is best described as a quantum mechanical mixture of [(MeO-PyNMe3)FeV(O)(OC(O)R)]2+ (∼75%) with some FeIV(O)(•OC(O)R) and FeIII(OOC(O)R) character. DFT studies of 3b(CPCA) reveal that the unbound oxygen of the carboxylate ligand, O2, is only 2.04 Å away from the oxo group, O1, corresponding to a Wiberg bond order for the O1-O2 bond of 0.35. This unusual geometry facilitates reversible O1-O2 bond formation and cleavage and accounts for the high reactivity of the intermediate when compared to the rates of hydrogen atom transfer and oxygen atom transfer reactions of FeIII(OC(O)R) ferric acyl peroxides and FeIV(O) complexes. The interaction of O2 with O1 leads to a significant downshift of the Fe-O1 Raman frequency (815 cm-1) relative to the 903 cm-1 value predicted for the hypothetical [(MeO-PyNMe3)FeV(O)(NCMe)]3+ complex.
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Affiliation(s)
- Ruixi Fan
- Department of Chemistry , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213 , United States
| | - Joan Serrano-Plana
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química , Universitat de Girona , C/M. Aurèlia Capmany 69 , 17003 Girona , Catalonia , Spain
| | - Williamson N Oloo
- Department of Chemistry and Center for Metals in Biocatalysis , University of Minnesota , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , United States
| | - Apparao Draksharapu
- Department of Chemistry and Center for Metals in Biocatalysis , University of Minnesota , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , United States
| | - Estefanía Delgado-Pinar
- Grup de Química Supramolecular, Institut de Ciència Molecular, Departament de Química Inorgànica , Universitat de València , 46980 Paterna , Valencia , Spain
| | - Anna Company
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química , Universitat de Girona , C/M. Aurèlia Capmany 69 , 17003 Girona , Catalonia , Spain
| | - Vlad Martin-Diaconescu
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química , Universitat de Girona , C/M. Aurèlia Capmany 69 , 17003 Girona , Catalonia , Spain
| | - Margarida Borrell
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química , Universitat de Girona , C/M. Aurèlia Capmany 69 , 17003 Girona , Catalonia , Spain
| | - Julio Lloret-Fillol
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Avinguda Països Catalans 16 , 43007 Tarragona , Spain
| | - Enrique García-España
- Grup de Química Supramolecular, Institut de Ciència Molecular, Departament de Química Inorgànica , Universitat de València , 46980 Paterna , Valencia , Spain
| | - Yisong Guo
- Department of Chemistry , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213 , United States
| | - Emile L Bominaar
- Department of Chemistry , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213 , United States
| | - Lawrence Que
- Department of Chemistry and Center for Metals in Biocatalysis , University of Minnesota , 207 Pleasant Street SE , Minneapolis , Minnesota 55455 , United States
| | - Miquel Costas
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química , Universitat de Girona , C/M. Aurèlia Capmany 69 , 17003 Girona , Catalonia , Spain
| | - Eckard Münck
- Department of Chemistry , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213 , United States
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18
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Serrano-Plana J, Acuña-Parés F, Dantignana V, Oloo WN, Castillo E, Draksharapu A, Whiteoak CJ, Martin-Diaconescu V, Basallote MG, Luis JM, Que L, Costas M, Company A. Acid-Triggered O-O Bond Heterolysis of a Nonheme Fe III (OOH) Species for the Stereospecific Hydroxylation of Strong C-H Bonds. Chemistry 2018; 24:5331-5340. [PMID: 29193378 DOI: 10.1002/chem.201704851] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Indexed: 12/11/2022]
Abstract
A novel hydroperoxoiron(III) species [FeIII (OOH)(MeCN)(PyNMe3 )]2+ (3) has been generated by reaction of its ferrous precursor [FeII (CF3 SO3 )2 (PyNMe3 )] (1) with hydrogen peroxide at low temperatures. This species has been characterized by several spectroscopic techniques and cryospray mass spectrometry. Similar to most of the previously described low-spin hydroperoxoiron(III) compounds, 3 behaves as a sluggish oxidant and it is not kinetically competent for breaking weak C-H bonds. However, triflic acid addition to 3 causes its transformation into a much more reactive compound towards organic substrates that is capable of oxidizing unactivated C-H bonds with high stereospecificity. Stopped-flow kinetic analyses and theoretical studies provide a rationale for the observed chemistry, a triflic-acid-assisted heterolytic cleavage of the O-O bond to form a putative strongly oxidizing oxoiron(V) species. This mechanism is reminiscent to that observed in heme systems, where protonation of the hydroperoxo intermediate leads to the formation of the high-valent [(Porph. )FeIV (O)] (Compound I).
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Affiliation(s)
- Joan Serrano-Plana
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, C/ M. Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain
| | - Ferran Acuña-Parés
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, C/ M. Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain.,Institute of Chemical Research of Catalonia (ICIQ), Avinguda Països Catalans 16, 43007, Tarragona, Spain
| | - Valeria Dantignana
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, C/ M. Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain
| | - Williamson N Oloo
- Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Esther Castillo
- Departamento de Ciencia de los Materiales e Ingeniería MetalúrgicayQuímica Inorgánica, Universidad de Cádiz, Facultad de Ciencias, Apdo. 40, 11510, Puerto Real, Cádiz, Spain
| | - Apparao Draksharapu
- Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Christopher J Whiteoak
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, C/ M. Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain
| | - Vlad Martin-Diaconescu
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, C/ M. Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain
| | - Manuel G Basallote
- Departamento de Ciencia de los Materiales e Ingeniería MetalúrgicayQuímica Inorgánica, Universidad de Cádiz, Facultad de Ciencias, Apdo. 40, 11510, Puerto Real, Cádiz, Spain
| | - Josep M Luis
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, C/ M. Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain
| | - Lawrence Que
- Department of Chemistry and Center for Metals in Biocatalysis, University of Minnesota, Minneapolis, MN, 55455, USA
| | - Miquel Costas
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, C/ M. Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain
| | - Anna Company
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, C/ M. Aurèlia Capmany 69, 17003, Girona, Catalonia, Spain
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19
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Dantignana V, Milan M, Cussó O, Company A, Bietti M, Costas M. Chemoselective Aliphatic C-H Bond Oxidation Enabled by Polarity Reversal. ACS Cent Sci 2017; 3:1350-1358. [PMID: 29296677 PMCID: PMC5746866 DOI: 10.1021/acscentsci.7b00532] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Indexed: 06/07/2023]
Abstract
Methods for selective oxidation of aliphatic C-H bonds are called on to revolutionize organic synthesis by providing novel and more efficient paths. Realization of this goal requires the discovery of mechanisms that can alter in a predictable manner the innate reactivity of these bonds. Ideally, these mechanisms need to make oxidation of aliphatic C-H bonds, which are recognized as relatively inert, compatible with the presence of electron rich functional groups that are highly susceptible to oxidation. Furthermore, predictable modification of the relative reactivity of different C-H bonds within a molecule would enable rapid diversification of the resulting oxidation products. Herein we show that by engaging in hydrogen bonding, fluorinated alcohols exert a polarity reversal on electron rich functional groups, directing iron and manganese catalyzed oxidation toward a priori stronger and unactivated C-H bonds. As a result, selective hydroxylation of methylenic sites in hydrocarbons and remote aliphatic C-H oxidation of otherwise sensitive alcohol, ether, amide, and amine substrates is achieved employing aqueous hydrogen peroxide as oxidant. Oxidations occur in a predictable manner, with outstanding levels of product chemoselectivity, preserving the first-formed hydroxylation product, thus representing an extremely valuable tool for synthetic planning and development.
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Affiliation(s)
- Valeria Dantignana
- Grup
de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT),
Institut de Química Computacional i Catàlisi (IQCC)
and Departament de Química, Universitat
de Girona, Campus Montilivi, Girona E-17071, Catalonia, Spain
| | - Michela Milan
- Grup
de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT),
Institut de Química Computacional i Catàlisi (IQCC)
and Departament de Química, Universitat
de Girona, Campus Montilivi, Girona E-17071, Catalonia, Spain
| | - Olaf Cussó
- Grup
de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT),
Institut de Química Computacional i Catàlisi (IQCC)
and Departament de Química, Universitat
de Girona, Campus Montilivi, Girona E-17071, Catalonia, Spain
| | - Anna Company
- Grup
de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT),
Institut de Química Computacional i Catàlisi (IQCC)
and Departament de Química, Universitat
de Girona, Campus Montilivi, Girona E-17071, Catalonia, Spain
| | - Massimo Bietti
- Dipartimento
di Scienze e Tecnologie Chimiche, Università
“Tor Vergata”, Via della Ricerca Scientifica, 1, I-00133 Rome, Italy
| | - Miquel Costas
- Grup
de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT),
Institut de Química Computacional i Catàlisi (IQCC)
and Departament de Química, Universitat
de Girona, Campus Montilivi, Girona E-17071, Catalonia, Spain
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20
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Planas O, Roldán-Gómez S, Martin-Diaconescu V, Parella T, Luis JM, Company A, Ribas X. Carboxylate-Assisted Formation of Aryl-Co(III) Masked-Carbenes in Cobalt-Catalyzed C–H Functionalization with Diazo Esters. J Am Chem Soc 2017; 139:14649-14655. [DOI: 10.1021/jacs.7b07880] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Oriol Planas
- Institut
de Química Computacional i Catàlisi (IQCC) and Departament
de Química, Universitat de Girona, Campus Montilivi, Girona, E-17003 Catalonia, Spain
| | - Steven Roldán-Gómez
- Institut
de Química Computacional i Catàlisi (IQCC) and Departament
de Química, Universitat de Girona, Campus Montilivi, Girona, E-17003 Catalonia, Spain
| | - Vlad Martin-Diaconescu
- Institut
de Química Computacional i Catàlisi (IQCC) and Departament
de Química, Universitat de Girona, Campus Montilivi, Girona, E-17003 Catalonia, Spain
| | - Teodor Parella
- Servei
de RMN, Facultat de Ciències, Universitat Autònoma de Barcelona, Campus UAB, Bellaterra, E-08193 Catalonia, Spain
| | - Josep M. Luis
- Institut
de Química Computacional i Catàlisi (IQCC) and Departament
de Química, Universitat de Girona, Campus Montilivi, Girona, E-17003 Catalonia, Spain
| | - Anna Company
- Institut
de Química Computacional i Catàlisi (IQCC) and Departament
de Química, Universitat de Girona, Campus Montilivi, Girona, E-17003 Catalonia, Spain
| | - Xavi Ribas
- Institut
de Química Computacional i Catàlisi (IQCC) and Departament
de Química, Universitat de Girona, Campus Montilivi, Girona, E-17003 Catalonia, Spain
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21
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Rovira M, Roldán-Gómez S, Martin-Diaconescu V, Whiteoak CJ, Company A, Luis JM, Ribas X. Trifluoromethylation of a Well-Defined Square-Planar Aryl-Ni II Complex involving Ni III /CF 3. and Ni IV -CF 3 Intermediate Species. Chemistry 2017; 23:11662-11668. [PMID: 28685908 DOI: 10.1002/chem.201702168] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Indexed: 11/11/2022]
Abstract
Ni-mediated trifluoromethylation of an aryl-Br bond in model macrocyclic ligands (Ln -Br) has been thoroughly studied, starting with an oxidative addition at Ni0 to obtain well-defined aryl-NiII -Br complexes ([Ln -NiII ]Br). Abstraction of the halide with AgX (X=OTf- or ClO4- ) thereafter provides [Ln -NiII ](OTf). The nitrate analogue has been obtained through a direct C-H activation of an aryl-H bond using NiII salts, and this route has been studied by X-ray absorption spectroscopy (XAS). Crystallographic XRD and XAS characterization has shown a tight macrocyclic coordination in the aryl-NiII complex, which may hamper direct reaction with nucleophiles. On the contrary, enhanced reactivity is observed with oxidants, and the reaction of [Ln -NiII ](OTf) with CF3+ sources afforded Ln -CF3 products in quantitative yield. A combined experimental and theoretical mechanistic study provides new insights into the operative mechanism for this transformation. Computational analysis indicates the occurrence of an initial single electron transfer (SET) to 5-(trifluoromethyl)dibenzothiophenium triflate (TDTT), producing a transient L1 -NiIII /CF3. adduct, which rapidly recombines to form a [L1 -NiIV -CF3 ](X)2 intermediate species. A final facile reductive elimination affords L1 -CF3 . The well-defined square-planar model system studied here permits to gain fundamental knowledge on the rich redox chemistry of nickel, which is sought to facilitate the development of new Ni-based trifluoromethylation methodologies.
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Affiliation(s)
- Mireia Rovira
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Facultat Ciències, 17003, Girona, Catalonia, Spain
| | - Steven Roldán-Gómez
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Facultat Ciències, 17003, Girona, Catalonia, Spain
| | - Vlad Martin-Diaconescu
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Facultat Ciències, 17003, Girona, Catalonia, Spain
| | - Christopher J Whiteoak
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Facultat Ciències, 17003, Girona, Catalonia, Spain.,Biomolecular Sciences Research Centre, Faculty of Health and Wellbeing, Sheffield Hallam University, City Campus, Sheffield, S1 1WB, UK
| | - Anna Company
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Facultat Ciències, 17003, Girona, Catalonia, Spain
| | - Josep M Luis
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Facultat Ciències, 17003, Girona, Catalonia, Spain
| | - Xavi Ribas
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Facultat Ciències, 17003, Girona, Catalonia, Spain
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22
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Holze P, Corona T, Frank N, Braun-Cula B, Herwig C, Company A, Limberg C. Activation of Dioxygen at a Lewis Acidic Nickel(II) Complex: Characterization of a Metastable Organoperoxide Complex. Angew Chem Int Ed Engl 2017; 56:2307-2311. [PMID: 28111896 DOI: 10.1002/anie.201609526] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 10/31/2016] [Indexed: 11/05/2022]
Abstract
In metal-mediated O2 activation, nickel(II) compounds hardly play a role, but recently it has been shown that enzymes can use nickel(II) for O2 activation. Now a low-coordinate Lewis acidic nickel(II) complex has been synthesized that reacts with O2 to give a nickel(II) organoperoxide, as proposed for the enzymatic system. Its formation was studied further by UV/Vis absorption spectroscopy, leading to the observation of a short-lived intermediate that proved to be reactive in both oxygen atom transfer and hydrogen abstraction reactions, while the peroxide efficiently transfers O atoms. Both for the enzyme and for the functional model, the key to O2 activation is proposed to represent a concomitant electron shift from the substrate/co-ligand.
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Affiliation(s)
- Patrick Holze
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
| | - Teresa Corona
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, 17003, Girona, Catalonia, Spain
| | - Nicolas Frank
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
| | - Beatrice Braun-Cula
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
| | - Christian Herwig
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
| | - Anna Company
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, 17003, Girona, Catalonia, Spain
| | - Christian Limberg
- Humboldt-Universität zu Berlin, Institut für Chemie, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
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23
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Holze P, Corona T, Frank N, Braun-Cula B, Herwig C, Company A, Limberg C. Activation of Dioxygen at a Lewis Acidic Nickel(II) Complex: Characterization of a Metastable Organoperoxide Complex. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201609526] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Patrick Holze
- Humboldt-Universität zu Berlin; Institut für Chemie; Brook-Taylor-Strasse 2 12489 Berlin Germany
| | - Teresa Corona
- Grup de Química Bioinspirada; Supramolecular i Catàlisi (QBIS-CAT); Institut de Química Computacional i Catàlisi (IQCC); Departament de Química; Universitat de Girona; 17003 Girona Catalonia Spain
| | - Nicolas Frank
- Humboldt-Universität zu Berlin; Institut für Chemie; Brook-Taylor-Strasse 2 12489 Berlin Germany
| | - Beatrice Braun-Cula
- Humboldt-Universität zu Berlin; Institut für Chemie; Brook-Taylor-Strasse 2 12489 Berlin Germany
| | - Christian Herwig
- Humboldt-Universität zu Berlin; Institut für Chemie; Brook-Taylor-Strasse 2 12489 Berlin Germany
| | - Anna Company
- Grup de Química Bioinspirada; Supramolecular i Catàlisi (QBIS-CAT); Institut de Química Computacional i Catàlisi (IQCC); Departament de Química; Universitat de Girona; 17003 Girona Catalonia Spain
| | - Christian Limberg
- Humboldt-Universität zu Berlin; Institut für Chemie; Brook-Taylor-Strasse 2 12489 Berlin Germany
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24
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Corona T, Padamati SK, Acuña-Parés F, Duboc C, Browne WR, Company A. Trapping of superoxido cobalt and peroxido dicobalt species formed reversibly from CoII and O2. Chem Commun (Camb) 2017; 53:11782-11785. [DOI: 10.1039/c7cc05904c] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Superoxido cobalt(iii) and peroxido dicobalt(iii) species are formed in the temperature dependent reversible reaction of a common cobalt(ii) precursor with O2.
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Affiliation(s)
- Teresa Corona
- Grup de Química Bioinspirada
- Supramolecular i Catàlisi (QBIS-CAT)
- Institut de Química Computacional i Catàlisi (IQCC)
- Departament de Química
- Universitat de Girona
| | - Sandeep K. Padamati
- Molecular Inorganic Chemistry
- Stratingh Institute for Chemistry
- Faculty of Science and Engineering
- University of Groningen
- Nijenborgh 4
| | - Ferran Acuña-Parés
- Institut Català d’Investigació Química (ICIQ)
- Av. Països Catalans 16
- E-43007 Tarragona
- Spain
| | - Carole Duboc
- Univ. Grenoble Alpes
- UMR CNRS 5250
- Département de Chimie Moléculaire
- F-38000 Grenoble
- France
| | - Wesley R. Browne
- Molecular Inorganic Chemistry
- Stratingh Institute for Chemistry
- Faculty of Science and Engineering
- University of Groningen
- Nijenborgh 4
| | - Anna Company
- Grup de Química Bioinspirada
- Supramolecular i Catàlisi (QBIS-CAT)
- Institut de Química Computacional i Catàlisi (IQCC)
- Departament de Química
- Universitat de Girona
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25
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Planas O, Whiteoak CJ, Martin-Diaconescu V, Gamba I, Luis JM, Parella T, Company A, Ribas X. Isolation of Key Organometallic Aryl-Co(III) Intermediates in Cobalt-Catalyzed C(sp2)–H Functionalizations and New Insights into Alkyne Annulation Reaction Mechanisms. J Am Chem Soc 2016; 138:14388-14397. [DOI: 10.1021/jacs.6b08593] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Oriol Planas
- Institut
de Química Computacional i Catàlisi (IQCC) and Departament
de Química, Universitat de Girona, Campus Montilivi, Girona, E-17071 Catalonia, Spain
| | - Christopher J. Whiteoak
- Institut
de Química Computacional i Catàlisi (IQCC) and Departament
de Química, Universitat de Girona, Campus Montilivi, Girona, E-17071 Catalonia, Spain
- Biomolecular
Sciences Research Centre, Faculty of Health and Wellbeing, Sheffield Hallam University, City Campus, Sheffield S1 1WB, England
| | - Vlad Martin-Diaconescu
- Institut
de Química Computacional i Catàlisi (IQCC) and Departament
de Química, Universitat de Girona, Campus Montilivi, Girona, E-17071 Catalonia, Spain
| | - Ilaria Gamba
- Institut
de Química Computacional i Catàlisi (IQCC) and Departament
de Química, Universitat de Girona, Campus Montilivi, Girona, E-17071 Catalonia, Spain
| | - Josep M. Luis
- Institut
de Química Computacional i Catàlisi (IQCC) and Departament
de Química, Universitat de Girona, Campus Montilivi, Girona, E-17071 Catalonia, Spain
| | - Teodor Parella
- Servei
de RMN, Facultat de Ciències, Universitat Autònoma de Barcelona, Campus UAB, Bellaterra, E-08193 Catalonia, Spain
| | - Anna Company
- Institut
de Química Computacional i Catàlisi (IQCC) and Departament
de Química, Universitat de Girona, Campus Montilivi, Girona, E-17071 Catalonia, Spain
| | - Xavi Ribas
- Institut
de Química Computacional i Catàlisi (IQCC) and Departament
de Química, Universitat de Girona, Campus Montilivi, Girona, E-17071 Catalonia, Spain
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26
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Corona T, Ribas L, Rovira M, Farquhar ER, Ribas X, Ray K, Company A. Characterization and Reactivity Studies of a Terminal Copper-Nitrene Species. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607238] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Teresa Corona
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT); Institut de Química Computacional i Catàlisi (IQCC); Departament de Química; Universitat de Girona; Campus Montilivi, E 17003 Girona Catalonia Spain
| | - Lídia Ribas
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT); Institut de Química Computacional i Catàlisi (IQCC); Departament de Química; Universitat de Girona; Campus Montilivi, E 17003 Girona Catalonia Spain
| | - Mireia Rovira
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT); Institut de Química Computacional i Catàlisi (IQCC); Departament de Química; Universitat de Girona; Campus Montilivi, E 17003 Girona Catalonia Spain
| | - Erik R. Farquhar
- Case Western Reserve University Center for Synchrotron Biosciences and Center for Proteomics and Bioinformatics; National Synchrotron Light Source II; Brookhaven National Laboratory Upton New York 11973 USA
| | - Xavi Ribas
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT); Institut de Química Computacional i Catàlisi (IQCC); Departament de Química; Universitat de Girona; Campus Montilivi, E 17003 Girona Catalonia Spain
| | - Kallol Ray
- Department of Chemistry; Humboldt Universität zu Berlin; Brook-Taylor Strasse 2 12489 Berlin Germany
| | - Anna Company
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT); Institut de Química Computacional i Catàlisi (IQCC); Departament de Química; Universitat de Girona; Campus Montilivi, E 17003 Girona Catalonia Spain
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27
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Corona T, Ribas L, Rovira M, Farquhar ER, Ribas X, Ray K, Company A. Characterization and Reactivity Studies of a Terminal Copper-Nitrene Species. Angew Chem Int Ed Engl 2016; 55:14005-14008. [PMID: 27723252 DOI: 10.1002/anie.201607238] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Indexed: 11/11/2022]
Abstract
High-valent terminal copper-nitrene species have been postulated as key intermediates in copper-catalyzed aziridination and amination reactions. The high reactivity of these intermediates has prevented their characterization for decades, thereby making the mechanisms ambiguous. Very recently, the Lewis acid adduct of a copper-nitrene intermediate was trapped at -90 °C and shown to be active in various oxidation reactions. Herein, we describe for the first time the synthesis and spectroscopic characterization of a terminal copper(II)-nitrene radical species that is stable at room temperature in the absence of any Lewis acid. The azide derivative of a triazamacrocyclic ligand that had previously been utilized in the stabilization of aryl-CuIII intermediates was employed as an ancillary ligand in the study. The terminal copper(II)-nitrene radical species is able to transfer a nitrene moiety to phosphines and abstract a hydrogen atom from weak C-H bonds, leading to the formation of oxidized products in modest yields.
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Affiliation(s)
- Teresa Corona
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, E, 17003, Girona, Catalonia, Spain
| | - Lídia Ribas
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, E, 17003, Girona, Catalonia, Spain
| | - Mireia Rovira
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, E, 17003, Girona, Catalonia, Spain
| | - Erik R Farquhar
- Case Western Reserve University Center for Synchrotron Biosciences and Center for Proteomics and Bioinformatics, National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, New York, 11973, USA
| | - Xavi Ribas
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, E, 17003, Girona, Catalonia, Spain.
| | - Kallol Ray
- Department of Chemistry, Humboldt Universität zu Berlin, Brook-Taylor Strasse 2, 12489, Berlin, Germany.
| | - Anna Company
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, E, 17003, Girona, Catalonia, Spain.
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28
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Corona T, Draksharapu A, Padamati SK, Gamba I, Martin-Diaconescu V, Acuña-Parés F, Browne WR, Company A. Rapid Hydrogen and Oxygen Atom Transfer by a High-Valent Nickel-Oxygen Species. J Am Chem Soc 2016; 138:12987-12996. [PMID: 27598293 DOI: 10.1021/jacs.6b07544] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Terminal high-valent metal-oxygen species are key reaction intermediates in the catalytic cycle of both enzymes (e.g., oxygenases) and synthetic oxidation catalysts. While tremendous efforts have been directed toward the characterization of the biologically relevant terminal manganese-oxygen and iron-oxygen species, the corresponding analogues based on late-transition metals such as cobalt, nickel or copper are relatively scarce. This scarcity is in part related to the "Oxo Wall" concept, which predicts that late transition metals cannot support a terminal oxido ligand in a tetragonal environment. Here, the nickel(II) complex (1) of the tetradentate macrocyclic ligand bearing a 2,6-pyridinedicarboxamidate unit is shown to be an effective catalyst in the chlorination and oxidation of C-H bonds with sodium hypochlorite as terminal oxidant in the presence of acetic acid (AcOH). Insight into the active species responsible for the observed reactivity was gained through the study of the reaction of 1 with ClO- at low temperature by UV-vis absorption, resonance Raman, EPR, ESI-MS, and XAS analyses. DFT calculations aided the assignment of the trapped chromophoric species (3) as a nickel-hypochlorite species. Despite the fact that the formal oxidation state of the nickel in 3 is +4, experimental and computational analysis indicate that 3 is best formulated as a NiIII complex with one unpaired electron delocalized in the ligands surrounding the metal center. Most remarkably, 3 reacts rapidly with a range of substrates including those with strong aliphatic C-H bonds, indicating the direct involvement of 3 in the oxidation/chlorination reactions observed in the 1/ClO-/AcOH catalytic system.
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Affiliation(s)
- Teresa Corona
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Facultat de Ciències, Universitat de Girona, C/ Maria Aurèlia Capmany 69 , E17003 Girona, Catalonia, Spain
| | - Apparao Draksharapu
- Molecular Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of Groningen , Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Sandeep K Padamati
- Molecular Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of Groningen , Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Ilaria Gamba
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Facultat de Ciències, Universitat de Girona, C/ Maria Aurèlia Capmany 69 , E17003 Girona, Catalonia, Spain
| | - Vlad Martin-Diaconescu
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Facultat de Ciències, Universitat de Girona, C/ Maria Aurèlia Capmany 69 , E17003 Girona, Catalonia, Spain
| | - Ferran Acuña-Parés
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Facultat de Ciències, Universitat de Girona, C/ Maria Aurèlia Capmany 69 , E17003 Girona, Catalonia, Spain
| | - Wesley R Browne
- Molecular Inorganic Chemistry, Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of Groningen , Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Anna Company
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Facultat de Ciències, Universitat de Girona, C/ Maria Aurèlia Capmany 69 , E17003 Girona, Catalonia, Spain
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29
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Abstract
Iron, copper, and manganese are the predominant metals found in oxygenases that perform efficient and selective hydrocarbon oxidations and for this reason, a large number of the corresponding metal-oxygen species has been described. However, in recent years nickel has been found in the active site of enzymes involved in oxidation processes, in which nickel-dioxygen species are proposed to play a key role. Owing to this biological relevance and to the existence of different catalytic protocols that involve the use of nickel catalysts in oxidation reactions, there is a growing interest in the detection and characterization of nickel-oxygen species relevant to these processes. In this Minireview the spectroscopically/structurally characterized synthetic superoxo, peroxo, and oxonickel species that have been reported to date are described. From these studies it becomes clear that nickel is a very promising metal in the field of oxidation chemistry with still unexplored possibilities.
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Affiliation(s)
- Teresa Corona
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, 17003, Girona, Catalonia, Spain
| | - Anna Company
- Grup de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, 17003, Girona, Catalonia, Spain.
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30
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Puri M, Company A, Sabenya G, Costas M, Que L. Oxygen Atom Exchange between H2O and Non-Heme Oxoiron(IV) Complexes: Ligand Dependence and Mechanism. Inorg Chem 2016; 55:5818-27. [DOI: 10.1021/acs.inorgchem.6b00023] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mayank Puri
- Department of Chemistry and Center for
Metals in Biocatalysis, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Anna Company
- Grup de
Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT),
Institut de Química Computacional i Catàlisi (IQCC),
Departament de Química, Universitat de Girona, Campus de
Montilivi, E17071, Girona, Catalonia Spain
| | - Gerard Sabenya
- Grup de
Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT),
Institut de Química Computacional i Catàlisi (IQCC),
Departament de Química, Universitat de Girona, Campus de
Montilivi, E17071, Girona, Catalonia Spain
| | - Miquel Costas
- Grup de
Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT),
Institut de Química Computacional i Catàlisi (IQCC),
Departament de Química, Universitat de Girona, Campus de
Montilivi, E17071, Girona, Catalonia Spain
| | - Lawrence Que
- Department of Chemistry and Center for
Metals in Biocatalysis, University of Minnesota, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
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31
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Whiteoak CJ, Planas O, Company A, Ribas X. A First Example of Cobalt-Catalyzed Remote CH Functionalization of 8-Aminoquinolines Operating through a Single Electron Transfer Mechanism. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600161] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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32
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Serrano-Plana J, Aguinaco A, Belda R, García-España E, Basallote MG, Company A, Costas M. Exceedingly Fast Oxygen Atom Transfer to Olefins via a Catalytically Competent Nonheme Iron Species. Angew Chem Int Ed Engl 2016; 55:6310-4. [DOI: 10.1002/anie.201601396] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Revised: 03/21/2016] [Indexed: 10/21/2022]
Affiliation(s)
- Joan Serrano-Plana
- Grup de Química Bioinorgànica; Supramolecular i Catàlisi (QBIS-CAT); Institut de Química Computacional I Catàlisi (IQCC); Departament de Química; Universitat de Girona; Campus Montilivi 17071 Girona Catalonia, Spain
| | - Almudena Aguinaco
- Universidad de Cádiz; Facultad de Ciencias; Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica; Apdo. 40, 11510 Puerto Real Cádiz Spain
| | - Raquel Belda
- Instituto de Ciencia Molecular (ICMol); Universidad de Valencia; C/Catedrático José Beltrán, Paterna Valencia 2 46980 Spain
| | - Enrique García-España
- Instituto de Ciencia Molecular (ICMol); Universidad de Valencia; C/Catedrático José Beltrán, Paterna Valencia 2 46980 Spain
| | - Manuel G. Basallote
- Universidad de Cádiz; Facultad de Ciencias; Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica; Apdo. 40, 11510 Puerto Real Cádiz Spain
| | - Anna Company
- Grup de Química Bioinorgànica; Supramolecular i Catàlisi (QBIS-CAT); Institut de Química Computacional I Catàlisi (IQCC); Departament de Química; Universitat de Girona; Campus Montilivi 17071 Girona Catalonia, Spain
| | - Miquel Costas
- Grup de Química Bioinorgànica; Supramolecular i Catàlisi (QBIS-CAT); Institut de Química Computacional I Catàlisi (IQCC); Departament de Química; Universitat de Girona; Campus Montilivi 17071 Girona Catalonia, Spain
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33
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Serrano-Plana J, Aguinaco A, Belda R, García-España E, Basallote MG, Company A, Costas M. Exceedingly Fast Oxygen Atom Transfer to Olefins via a Catalytically Competent Nonheme Iron Species. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601396] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Joan Serrano-Plana
- Grup de Química Bioinorgànica; Supramolecular i Catàlisi (QBIS-CAT); Institut de Química Computacional I Catàlisi (IQCC); Departament de Química; Universitat de Girona; Campus Montilivi 17071 Girona Catalonia, Spain
| | - Almudena Aguinaco
- Universidad de Cádiz; Facultad de Ciencias; Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica; Apdo. 40, 11510 Puerto Real Cádiz Spain
| | - Raquel Belda
- Instituto de Ciencia Molecular (ICMol); Universidad de Valencia; C/Catedrático José Beltrán, Paterna Valencia 2 46980 Spain
| | - Enrique García-España
- Instituto de Ciencia Molecular (ICMol); Universidad de Valencia; C/Catedrático José Beltrán, Paterna Valencia 2 46980 Spain
| | - Manuel G. Basallote
- Universidad de Cádiz; Facultad de Ciencias; Departamento de Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica; Apdo. 40, 11510 Puerto Real Cádiz Spain
| | - Anna Company
- Grup de Química Bioinorgànica; Supramolecular i Catàlisi (QBIS-CAT); Institut de Química Computacional I Catàlisi (IQCC); Departament de Química; Universitat de Girona; Campus Montilivi 17071 Girona Catalonia, Spain
| | - Miquel Costas
- Grup de Química Bioinorgànica; Supramolecular i Catàlisi (QBIS-CAT); Institut de Química Computacional I Catàlisi (IQCC); Departament de Química; Universitat de Girona; Campus Montilivi 17071 Girona Catalonia, Spain
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34
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Abstract
A new cobalt(ii) complex reacts with N2O under mild conditions and it catalytically performs the oxidation of aldehydes.
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Affiliation(s)
- Teresa Corona
- Grup de Química Bioinspirada
- Supramolecular i Catàlisi (QBIS-CAT)
- Institut de Química Computacional i Catàlisi (IQCC)
- Departament de Química
- Universitat de Girona
| | - Anna Company
- Grup de Química Bioinspirada
- Supramolecular i Catàlisi (QBIS-CAT)
- Institut de Química Computacional i Catàlisi (IQCC)
- Departament de Química
- Universitat de Girona
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35
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Serrano-Plana J, Oloo WN, Acosta-Rueda L, Meier KK, Verdejo B, García-España E, Basallote MG, Münck E, Que L, Company A, Costas M. Trapping a Highly Reactive Nonheme Iron Intermediate That Oxygenates Strong C—H Bonds with Stereoretention. J Am Chem Soc 2015; 137:15833-42. [DOI: 10.1021/jacs.5b09904] [Citation(s) in RCA: 126] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Joan Serrano-Plana
- Grup
de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT),
Institut de Química Computacional i Catàlisi (IQCC),
Departament de Química, Universitat de Girona, Campus de
Montilivi, Girona E17071, Catalonia, Spain
| | - Williamson N. Oloo
- Department
of Chemistry and Center for Metals in Biocatalysis, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Laura Acosta-Rueda
- Universidad de Cádiz, Facultad de Ciencias, Departamento
de Ciencia de los Materiales e Ingeniería Metalúrgica
y Química Inorgánica, Apdo. 40, Puerto Real, Cádiz 11510, Spain
| | - Katlyn K. Meier
- Department
of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Begoña Verdejo
- Instituto
de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático
José Beltrán, Paterna, Valencia 2 46980, Spain
| | - Enrique García-España
- Instituto
de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático
José Beltrán, Paterna, Valencia 2 46980, Spain
| | - Manuel G. Basallote
- Universidad de Cádiz, Facultad de Ciencias, Departamento
de Ciencia de los Materiales e Ingeniería Metalúrgica
y Química Inorgánica, Apdo. 40, Puerto Real, Cádiz 11510, Spain
| | - Eckard Münck
- Department
of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh, Pennsylvania 15213, United States
| | - Lawrence Que
- Department
of Chemistry and Center for Metals in Biocatalysis, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Anna Company
- Grup
de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT),
Institut de Química Computacional i Catàlisi (IQCC),
Departament de Química, Universitat de Girona, Campus de
Montilivi, Girona E17071, Catalonia, Spain
| | - Miquel Costas
- Grup
de Química Bioinspirada, Supramolecular i Catàlisi (QBIS-CAT),
Institut de Química Computacional i Catàlisi (IQCC),
Departament de Química, Universitat de Girona, Campus de
Montilivi, Girona E17071, Catalonia, Spain
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36
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Planas O, Whiteoak CJ, Company A, Ribas X. Regioselective Access to Sultam Motifs through Cobalt-Catalyzed Annulation of Aryl Sulfonamides and Alkynes using an 8-Aminoquinoline Directing Group. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500690] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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37
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Soler M, Figueras E, Serrano-Plana J, González-Bártulos M, Massaguer A, Company A, Martínez MÁ, Malina J, Brabec V, Feliu L, Planas M, Ribas X, Costas M. Design, Preparation, and Characterization of Zn and Cu Metallopeptides Based On Tetradentate Aminopyridine Ligands Showing Enhanced DNA Cleavage Activity. Inorg Chem 2015; 54:10542-58. [PMID: 26503063 DOI: 10.1021/acs.inorgchem.5b01680] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The conjugation of redox-active complexes that can function as chemical nucleases to cationic tetrapeptides is pursued in this work in order to explore the expected synergistic effect between these two elements in DNA oxidative cleavage. Coordination complexes of biologically relevant first row metal ions, such as Zn(II) or Cu(II), containing the tetradentate ligands 1,4-dimethyl-7-(2-pyridylmethyl)-1,4,7-triazacyclononane ((Me2)PyTACN) and (2S,2S')-1,1'-bis(pyrid-2-ylmethyl)-2,2'-bipyrrolidine ((S,S')-BPBP) have been linked to a cationic LKKL tetrapeptide sequence. Solid-phase synthesis of the peptide-tetradentate ligand conjugates has been developed, and the preparation and characterization of the corresponding metallotetrapeptides is described. The DNA cleavage activity of Cu and Zn metallopeptides has been evaluated and compared to their metal binding conjugates as well as to the parent complexes and ligands. Very interestingly, the oxidative Cu metallopeptides 1Cu and 2Cu show an enhanced activity compared to the parent complexes, [Cu(PyTACN)](2+) and [Cu(BPBP)](2+), respectively. Under optimized conditions, 1Cu displays an apparent pseudo first-order rate constant (kobs) of ∼0.16 min(-1) with a supercoiled DNA half-life time (t1/2) of ∼4.3 min. On the other hand, kobs for 2Cu has been found to be ∼0.11 min(-1) with t1/2 ≈ 6.4 min. Hence, these results point out that the DNA cleavage activities promoted by the metallopeptides 1Cu and 2Cu render ∼4-fold and ∼23 rate accelerations in comparison with their parent Cu complexes. Additional binding assays and mechanistic studies demonstrate that the enhanced cleavage activities are explained by the presence of the cationic LKKL tetrapeptide sequence, which induces an improved binding affinity to the DNA, thus bringing the metal ion, which is responsible for cleavage, in close proximity.
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Affiliation(s)
- Marta Soler
- QBIS-CAT Research Group, Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona , Campus Montilivi, E-17071 Girona, Catalonia, Spain.,LIPPSO, Departament de Química, Universitat de Girona , Campus Montilivi, E-17071 Girona, Catalonia, Spain
| | - Eduard Figueras
- LIPPSO, Departament de Química, Universitat de Girona , Campus Montilivi, E-17071 Girona, Catalonia, Spain
| | - Joan Serrano-Plana
- QBIS-CAT Research Group, Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona , Campus Montilivi, E-17071 Girona, Catalonia, Spain
| | - Marta González-Bártulos
- Biochemistry of Cancer Group, Biochemistry and Molecular Biology Unit, Department de Química and Department of Biology, Universitat de Girona , Campus Montilivi, 17071 Girona, Catalunya, Spain
| | - Anna Massaguer
- Biochemistry of Cancer Group, Biochemistry and Molecular Biology Unit, Department de Química and Department of Biology, Universitat de Girona , Campus Montilivi, 17071 Girona, Catalunya, Spain
| | - Anna Company
- QBIS-CAT Research Group, Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona , Campus Montilivi, E-17071 Girona, Catalonia, Spain
| | - Ma Ángeles Martínez
- Biochemistry of Cancer Group, Biochemistry and Molecular Biology Unit, Department de Química and Department of Biology, Universitat de Girona , Campus Montilivi, 17071 Girona, Catalunya, Spain
| | - Jaroslav Malina
- Institute of Biophysics, Academy of Sciences of the Czech Republic , v.v.i., Kralovopolska 135, CZ-61265 Brno, Czech Republic
| | - Viktor Brabec
- Institute of Biophysics, Academy of Sciences of the Czech Republic , v.v.i., Kralovopolska 135, CZ-61265 Brno, Czech Republic
| | - Lidia Feliu
- LIPPSO, Departament de Química, Universitat de Girona , Campus Montilivi, E-17071 Girona, Catalonia, Spain
| | - Marta Planas
- LIPPSO, Departament de Química, Universitat de Girona , Campus Montilivi, E-17071 Girona, Catalonia, Spain
| | - Xavi Ribas
- QBIS-CAT Research Group, Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona , Campus Montilivi, E-17071 Girona, Catalonia, Spain
| | - Miquel Costas
- QBIS-CAT Research Group, Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona , Campus Montilivi, E-17071 Girona, Catalonia, Spain
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38
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Corona T, Pfaff FF, Acuña-Parés F, Draksharapu A, Whiteoak CJ, Martin-Diaconescu V, Lloret-Fillol J, Browne WR, Ray K, Company A. Reactivity of a Nickel(II) Bis(amidate) Complex with meta-Chloroperbenzoic Acid: Formation of a Potent Oxidizing Species. Chemistry 2015; 21:15029-38. [PMID: 26311073 DOI: 10.1002/chem.201501841] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Indexed: 12/14/2022]
Abstract
Herein, we report the formation of a highly reactive nickel-oxygen species that has been trapped following reaction of a Ni(II) precursor bearing a macrocyclic bis(amidate) ligand with meta-chloroperbenzoic acid (HmCPBA). This compound is only detectable at temperatures below 250 K and is much more reactive toward organic substrates (i.e., C-H bonds, C=C bonds, and sulfides) than previously reported well-defined nickel-oxygen species. Remarkably, this species is formed by heterolytic O-O bond cleavage of a Ni-HmCPBA precursor, which is concluded from experimental and computational data. On the basis of spectroscopy and DFT calculations, this reactive species is proposed to be a Ni(III) -oxyl compound.
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Affiliation(s)
- Teresa Corona
- Group de Química Bioinorgànica, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, 17071 Girona (Spain), Fax: (+34) 972-41-81-50
| | - Florian F Pfaff
- Humboldt Universität zu Berlin, Department of Chemistry, Brook-Taylor Strasse 2, 12489 Berlin (Germany)
| | - Ferran Acuña-Parés
- Group de Química Bioinorgànica, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, 17071 Girona (Spain), Fax: (+34) 972-41-81-50
| | - Apparao Draksharapu
- Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
| | - Christopher J Whiteoak
- Group de Química Bioinorgànica, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, 17071 Girona (Spain), Fax: (+34) 972-41-81-50
| | - Vlad Martin-Diaconescu
- Group de Química Bioinorgànica, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, 17071 Girona (Spain), Fax: (+34) 972-41-81-50
| | - Julio Lloret-Fillol
- Group de Química Bioinorgànica, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, 17071 Girona (Spain), Fax: (+34) 972-41-81-50.,Current address: Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona (Spain)
| | - Wesley R Browne
- Stratingh Institute for Chemistry, Faculty of Mathematics and Natural Sciences, University of Groningen, Nijenborgh 4, 9747 AG Groningen (The Netherlands)
| | - Kallol Ray
- Humboldt Universität zu Berlin, Department of Chemistry, Brook-Taylor Strasse 2, 12489 Berlin (Germany)
| | - Anna Company
- Group de Química Bioinorgànica, Supramolecular i Catàlisi (QBIS-CAT), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, 17071 Girona (Spain), Fax: (+34) 972-41-81-50.
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39
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Postils V, Company A, Solà M, Costas M, Luis JM. Computational Insight into the Mechanism of Alkane Hydroxylation by Non-heme Fe(PyTACN) Iron Complexes. Effects of the Substrate and Solvent. Inorg Chem 2015; 54:8223-36. [DOI: 10.1021/acs.inorgchem.5b00583] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Verònica Postils
- Institut de Química
Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus de Montilivi, 17071 Girona, Catalonia, Spain
| | - Anna Company
- Institut de Química
Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus de Montilivi, 17071 Girona, Catalonia, Spain
| | - Miquel Solà
- Institut de Química
Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus de Montilivi, 17071 Girona, Catalonia, Spain
| | - Miquel Costas
- Institut de Química
Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus de Montilivi, 17071 Girona, Catalonia, Spain
| | - Josep M. Luis
- Institut de Química
Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus de Montilivi, 17071 Girona, Catalonia, Spain
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40
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Serrano-Plana J, Garcia-Bosch I, Company A, Costas M. Structural and reactivity models for copper oxygenases: cooperative effects and novel reactivities. Acc Chem Res 2015. [PMID: 26207342 DOI: 10.1021/acs.accounts.5b00187] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Dioxygen is widely used in nature as oxidant. Nature itself has served as inspiration to use O2 in chemical synthesis. However, the use of dioxygen as an oxidant is not straightforward. Its triplet ground-state electronic structure makes it unreactive toward most organic substrates. In natural systems, metalloenzymes activate O2 by reducing it to more reactive peroxide (O2(2-)) or superoxide (O2(-)) forms. Over the years, the development of model systems containing transition metals has become a convenient tool for unravelling O2-activation mechanistic aspects and reproducing the oxidative activity of enzymes. Several copper-based systems have been developed within this area. Tyrosinase is a copper-based O2-activating enzyme, whose structure and reactivity have been widely studied, and that serves as a paradigm for O2 activation at a dimetal site. It contains a dicopper center in its active site, and it catalyzes the regioselective ortho-hydroxylation of phenols to catechols and further oxidation to quinones. This represents an important step in melanin biosynthesis and it is mediated by a dicopper(II) side-on peroxo intermediate species. In the present accounts, our research in the field of copper models for oxygen activation is collected. We have developed m-xylyl linked dicopper systems that mimick structural and reactivity aspects of tyrosinase. Synergistic cooperation of the two copper(I) centers results in O2 binding and formation of bis(μ-oxo)dicopper(III) cores. These in turn bind and ortho-hydroxylate phenolates via an electrophilic attack of the oxo ligand over the arene. Interestingly the bis(μ-oxo)dicopper(III) cores can also engage in ortho-hydroxylation-defluorination of deprotonated 2-fluorophenols, substrates that are well-known enzyme inhibitors. Analysis of Cu2O2 species with different binding modes show that only the bis(μ-oxo)dicopper(III) cores can mediate the reaction. Finally, the use of unsymmetric systems for oxygen activation is a field that still remains rather unexplored. We envision that the unsymmetry might infere interesting new reactivities. We contributed to this topic with the development of an unsymmetric ligand (m-XYL(N3N4)), whose dicuprous complex reacts with O2 and forms a trans-peroxo dicopper(II) species that showed a markedly different reactivity compared to a symmetric trans-peroxo dicopper(II) analog. Nucleophilic reactivity is observed for the unsymmetric trans-peroxo dicopper(II) species against electrophilies such as H(+), CO2 and aldehydes, and neither oxygen atom transfer nor hydrogen abstraction is observed when reacting with oxygen atom acceptors (triphenyl phosphine, sulfides) and substrates with weak C-H bonds. Instead, electrophilic monooxygenase-like ortho-hydroxylation reactivity is described for these unsymmetric species upon reaction with phenolates. Finally, by using a second dinucleating unsymmetric ligand (L(N3N4)), we have described copper(I) containing heterodimetallic systems and explored their O2 binding properties. Site specific metalation led to the generation of dimeric heterometallic M'CuO2CuM' species from intermolecular O2 binding at copper sites.
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Affiliation(s)
- Joan Serrano-Plana
- Grup
de Química Bioinorgànica, Supramolecular i Catàlisi
(QBIS-CAT), Institut de Química Computacional i Catàlisi
(IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, E17071 Girona, Catalonia, Spain
| | - Isaac Garcia-Bosch
- Grup
de Química Bioinorgànica, Supramolecular i Catàlisi
(QBIS-CAT), Institut de Química Computacional i Catàlisi
(IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, E17071 Girona, Catalonia, Spain
- Department of Chemistry, Southern Methodist University, Dallas, Texas 75275-0314, United States
| | - Anna Company
- Grup
de Química Bioinorgànica, Supramolecular i Catàlisi
(QBIS-CAT), Institut de Química Computacional i Catàlisi
(IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, E17071 Girona, Catalonia, Spain
| | - Miquel Costas
- Grup
de Química Bioinorgànica, Supramolecular i Catàlisi
(QBIS-CAT), Institut de Química Computacional i Catàlisi
(IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, E17071 Girona, Catalonia, Spain
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41
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Serrano-Plana J, Costas M, Company A. Building Complexity in O2-Binding Copper Complexes. Site-Selective Metalation and Intermolecular O2-Binding at Dicopper and Heterometallic Complexes Derived from an Unsymmetric Ligand. Inorg Chem 2014; 53:12929-38. [DOI: 10.1021/ic501951f] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Joan Serrano-Plana
- Grup de Química Bioinorgànica, Supramolecular
i Catàlisi (QBIS-CAT), Institut de Química Computacional
i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, E17071 Girona, Catalonia, Spain
| | - Miquel Costas
- Grup de Química Bioinorgànica, Supramolecular
i Catàlisi (QBIS-CAT), Institut de Química Computacional
i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, E17071 Girona, Catalonia, Spain
| | - Anna Company
- Grup de Química Bioinorgànica, Supramolecular
i Catàlisi (QBIS-CAT), Institut de Química Computacional
i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, E17071 Girona, Catalonia, Spain
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42
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Planas O, Clémancey M, Latour JM, Company A, Costas M. Structural modeling of iron halogenases: synthesis and reactivity of halide-iron(IV)-oxo compounds. Chem Commun (Camb) 2014; 50:10887-90. [PMID: 25093575 DOI: 10.1039/c4cc03234a] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
A structural synthetic model of the iron(IV)-oxo-halide active species of non-heme iron dependent halogenases is reported. Compounds with general formula [Fe(IV)(O)(X)(Pytacn)](+) (1-X, X = Cl, Br) have been prepared and characterized spectroscopically and chemically with regard to their oxidizing ability. 1-X performs hydrogen-atom abstraction of C-H bonds at reaction rates 2-3 times faster than the corresponding solvato dicationic species, thus modelling the first step in C-H functionalization taking place in natural halogenation.
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Affiliation(s)
- Oriol Planas
- Grup de Química Bioinorgànica i Supramolecular (QBIS), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, E17071 Girona, Catalonia, Spain.
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43
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Serrano-Plana J, Garcia-Bosch I, Miyake R, Costas M, Company A. SelectiveOrtho-Hydroxylation-Defluorination of 2-Fluorophenolates with a Bis(μ-oxo)dicopper(III) Species. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405060] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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44
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Serrano-Plana J, Garcia-Bosch I, Miyake R, Costas M, Company A. Selective ortho-hydroxylation-defluorination of 2-fluorophenolates with a bis(μ-oxo)dicopper(III) species. Angew Chem Int Ed Engl 2014; 53:9608-12. [PMID: 25044926 DOI: 10.1002/anie.201405060] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Indexed: 11/06/2022]
Abstract
The bis(μ-oxo)dicopper(III) species [Cu(III) 2 (μ-O)2 (m-XYL(MeAN) )](2+) (1) promotes the electrophilic ortho-hydroxylation-defluorination of 2-fluorophenolates to give the corresponding catechols, a reaction that is not accomplishable with a (η(2) :η(2) -O2 )dicopper(II) complex. Isotopic labeling studies show that the incoming oxygen atom originates from the bis(μ-oxo) unit. Ortho-hydroxylation-defluorination occurs selectively in intramolecular competition with other ortho-substituents such as chlorine or bromine.
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Affiliation(s)
- Joan Serrano-Plana
- Grup de Química Bioinorgànica i Supramolecular (QBIS), Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, 17071 Girona (Catalonia) (Spain)
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45
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Company A, Sabenya G, González-Béjar M, Gómez L, Clémancey M, Blondin G, Jasniewski AJ, Puri M, Browne WR, Latour JM, Que L, Costas M, Pérez-Prieto J, Lloret-Fillol J. Triggering the generation of an iron(IV)-oxo compound and its reactivity toward sulfides by Ru(II) photocatalysis. J Am Chem Soc 2014; 136:4624-33. [PMID: 24568126 PMCID: PMC3985778 DOI: 10.1021/ja412059c] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
![]()
The
preparation of [FeIV(O)(MePy2tacn)]2+ (2, MePy2tacn = N-methyl-N,N-bis(2-picolyl)-1,4,7-triazacyclononane)
by reaction of [FeII(MePy2tacn)(solvent)]2+ (1) and PhIO in CH3CN and its full
characterization are described. This compound can also be prepared
photochemically from its iron(II) precursor by irradiation at 447
nm in the presence of catalytic amounts of [RuII(bpy)3]2+ as photosensitizer and a sacrificial electron
acceptor (Na2S2O8). Remarkably, the
rate of the reaction of the photochemically prepared compound 2 toward sulfides increases 150-fold under irradiation, and 2 is partially regenerated after the sulfide has been consumed;
hence, the process can be repeated several times. The origin of this
rate enhancement has been established by studying the reaction of
chemically generated compound 2 with sulfides under different
conditions, which demonstrated that both light and [RuII(bpy)3]2+ are necessary for the observed increase
in the reaction rate. A combination of nanosecond time-resolved absorption
spectroscopy with laser pulse excitation and other mechanistic studies
has led to the conclusion that an electron transfer mechanism is the
most plausible explanation for the observed rate enhancement. According
to this mechanism, the in-situ-generated [RuIII(bpy)3]3+ oxidizes the sulfide to form the corresponding
radical cation, which is eventually oxidized by 2 to
the corresponding sulfoxide.
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Affiliation(s)
- Anna Company
- Grup de Química Bioinorgànica i Supramolecular (QBIS), Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi , E17071 Girona, Catalonia, Spain
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Canals M, Gonzalez-Olmos R, Costas M, Company A. Robust iron coordination complexes with N-based neutral ligands as efficient Fenton-like catalysts at neutral pH. Environ Sci Technol 2013; 47:9918-9927. [PMID: 23895017 DOI: 10.1021/es401602t] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The homogeneous Fenton-like oxidation of organic substrates in water with hydrogen peroxide, catalyzed by six different metal coordination complexes with N-based neutral ligands, was studied at ambient conditions and initial pH 7, employing hydrogen peroxide as the terminal oxidant. At low catalyst concentration, the catalytic oxidative depletion of toluene achieved by selected catalysts was much more efficient than that obtained by the Fenton reagent at pH 3. The influence of pH, the water matrix and the catalyst/hydrogen peroxide concentration were investigated for the oxidation of toluene employing [FeCl2(bpmcn)] (1, bpmcn = N,N'-bis(2-pyridylmethyl)-N,N'-dimethyl-trans-1,2-diaminocyclohexane), the most efficient catalyst of the series. Moreover, the evolution of catalysts [FeCl2(bpmcn)] (1) and [Fe(OTf)2(Pytacn)] (3, Pytacn = 1-(2-pyridylmethyl)-4,7-dimethyl-1,4,7-triazacyclononane, OTf = trifluoromethanesulfonate anion) during the course of the reaction was also studied by electrospray ionization mass spectrometry (ESI-MS). The oxidation products derived from toluene oxidation were also analyzed. A plausible mechanism of toluene degradation using [FeCl2(bpmcn)] (1) and [Fe(OTf)2(Pytacn)] (3) as catalysts was proposed, which involves the coexistence of a metal-based path, analogous to that operating in organic media where substrate oxidation is executed by an iron(V)-oxo-hydroxo species, in parallel to a Fenton-type process where hydroxyl radicals are formed.
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Affiliation(s)
- Maite Canals
- LEQUIA, Institute of the Environment, Universitat de Girona , Campus Montilivi, E17071 Girona (Catalonia - Spain)
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Prat I, Company A, Corona T, Parella T, Ribas X, Costas M. Assessing the Impact of Electronic and Steric Tuning of the Ligand in the Spin State and Catalytic Oxidation Ability of the FeII(Pytacn) Family of Complexes. Inorg Chem 2013; 52:9229-44. [DOI: 10.1021/ic4004033] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Irene Prat
- Grup de Química Bioinorgànica
i Supramolecular (QBIS), Institut de Química Computacional
i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, E17071 Girona,
Catalonia, Spain
| | - Anna Company
- Grup de Química Bioinorgànica
i Supramolecular (QBIS), Institut de Química Computacional
i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, E17071 Girona,
Catalonia, Spain
| | - Teresa Corona
- Grup de Química Bioinorgànica
i Supramolecular (QBIS), Institut de Química Computacional
i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, E17071 Girona,
Catalonia, Spain
| | - Teodor Parella
- Servei
de Ressonància
Magnètica Nuclear, Universitat Autònoma de Barcelona, Bellaterra, E08193 Barcelona, Catalonia,
Spain
| | - Xavi Ribas
- Grup de Química Bioinorgànica
i Supramolecular (QBIS), Institut de Química Computacional
i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, E17071 Girona,
Catalonia, Spain
| | - Miquel Costas
- Grup de Química Bioinorgànica
i Supramolecular (QBIS), Institut de Química Computacional
i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, E17071 Girona,
Catalonia, Spain
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Prat I, Company A, Postils V, Ribas X, Que L, Luis JM, Costas M. The mechanism of stereospecific C-H oxidation by Fe(Pytacn) complexes: bioinspired non-heme iron catalysts containing cis-labile exchangeable sites. Chemistry 2013; 19:6724-38. [PMID: 23536410 DOI: 10.1002/chem.201300110] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2013] [Indexed: 11/08/2022]
Abstract
A detailed mechanistic study of the hydroxylation of alkane C-H bonds using H2O2 by a family of mononuclear non heme iron catalysts with the formula [Fe(II)(CF3SO3)2(L)] is described, in which L is a tetradentate ligand containing a triazacyclononane tripod and a pyridine ring bearing different substituents at the α and γ positions, which tune the electronic or steric properties of the corresponding iron complexes. Two inequivalent cis-labile exchangeable sites, occupied by triflate ions, complete the octahedral iron coordination sphere. The C-H hydroxylation mediated by this family of complexes takes place with retention of configuration. Oxygen atoms from water are incorporated into hydroxylated products and the extent of this incorporation depends in a systematic manner on the nature of the catalyst, and the substrate. Mechanistic probes and isotopic analyses, in combination with detailed density functional theory (DFT) calculations, provide strong evidence that C-H hydroxylation is performed by highly electrophilic [Fe(V)(O)(OH)L] species through a concerted asynchronous mechanism, involving homolytic breakage of the C-H bond, followed by rebound of the hydroxyl ligand. The [Fe(V)(O)(OH)L] species can exist in two tautomeric forms, differing in the position of oxo and hydroxide ligands. Isotopic-labeling analysis shows that the relative reactivities of the two tautomeric forms are sensitively affected by the α substituent of the pyridine, and this reactivity behavior is rationalized by computational methods.
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Affiliation(s)
- Irene Prat
- Institut de Química Computacional i Catàlisi (IQCC), Departament de Química, Universitat de Girona, Campus Montilivi, 17071 Girona, Spain
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Prat I, Font D, Company A, Junge K, Ribas X, Beller M, Costas M. Fe(PyTACN)-Catalyzedcis-Dihydroxylation of Olefins with Hydrogen Peroxide. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201200938] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Funes-Artiaga J, Company A, Martín-González L, Triviño-Nolla C, Contel-Segura JC. [Performance improvement project for the introduction of safety devices: interdisciplinary approach and participation of professionals]. Rev Enferm 2012; 35:46-54. [PMID: 22670391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
OBJECTIVE Develop a performance improvement project to introduce safety needle tube holder for venous blood collection after evaluation of the professionals. METHODS Reach: Costa Ponent Primary Care Direction and the Hospital Viladecans Hospital from Institute Català de la Salut. METHOD Create interdisciplinary group. Design in two phases. First, material selection and assessment of safety devices. Second, implementation and evaluation of the proposed performance improvements. The material was selected using standardized criteria on safety devices, suitability to clinical practice and technical compatibility The assessment was qualitative questionnaire by adapting the Centers for Disease Control and Prevention. RESULT We evaluated three types of needles, two of them were evaluated by 54 primary care professionals and one for 12 professionals from the hospital. Good acceptance regarding their interaction with technology and patient safety. It was considered effective safety device. The overall rating was satisfactory. Underutilized the material by hospital professionals. There were no differences regarding sex, the hand size, experience, training you received, and type of needle. It prepared a proposal to come in progressively safety needle tube holder in primary care. The evaluation performed in the hospital it was considered insufficient. CONCLUSIONS Interdisciplinary participation is essential to implement measures to safe care. The safety needle evaluated were effective with respect to security professionals and the patient. The involvement of different levels of the organization have developed a proposal for performance improvement adapted to the needs of our environment.
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Affiliation(s)
- J Funes-Artiaga
- Unidad Básica de Prevención de Costa de Ponent, Gerencia Territorial Metropolitana Sur.
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