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Seo H, Prosser KE, Kalaj M, Karges J, Dick BL, Cohen SM. Evaluating Metal-Ligand Interactions of Metal-Binding Isosteres Using Model Complexes. Inorg Chem 2021; 60:17161-17172. [PMID: 34699201 DOI: 10.1021/acs.inorgchem.1c02433] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Bioisosteres are a useful approach to address pharmacokinetic liabilities and improve drug-like properties. Specific to developing metalloenzyme inhibitors, metal-binding pharmacophores (MBPs) have been combined with bioisosteres, to produce metal-binding isosteres (MBIs) as alternative scaffolds for use in fragment-based drug discovery (FBDD). Picolinic acid MBIs have been reported and evaluated for their metal-binding ability, pharmacokinetic properties, and enzyme inhibitory activity. However, their structural, electronic, and spectroscopic properties with metal ions other than Zn(II) have not been reported, which might reveal similarities and differences between MBIs and the parent MBPs. To this end, [M(TPA)(MBI)]+ (M = Ni(II) and Co(II), TPA = tris(2-pyridylmethyl)amine) is presented as a bioinorganic model system for investigating picolinic acid, four heterocyclic MBIs, and 2,2'-bipyridine. These complexes were characterized by X-ray crystallography as well as NMR, IR, and UV-vis spectroscopies, and their magnetic moments were accessed. In addition, [(TpPh,Me)Co(MBI)] (TpPh,Me = hydrotris(3,5-phenylmethylpyrazolyl)borate) was used as a second model compound, and the limitations and attributes of the two model systems are discussed. These results demonstrate that bioinorganic model complexes are versatile tools for metalloenzyme inhibitor design and can provide insights into the broader use of MBIs.
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Affiliation(s)
- Hyeonglim Seo
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Kathleen E Prosser
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Mark Kalaj
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Johannes Karges
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Benjamin L Dick
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
| | - Seth M Cohen
- Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States
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2
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Park SY, Hwang IS, Lee HJ, Song CE. Biomimetic catalytic transformation of toxic α-oxoaldehydes to high-value chiral α-hydroxythioesters using artificial glyoxalase I. Nat Commun 2017; 8:14877. [PMID: 28374736 PMCID: PMC5382281 DOI: 10.1038/ncomms14877] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 02/07/2017] [Indexed: 12/22/2022] Open
Abstract
Glyoxalase I plays a critical role in the enzymatic defence against glycation by catalysing the isomerization of hemithioacetal, formed spontaneously from cytotoxic α-oxoaldehydes and glutathione, to (S)-α-hydroxyacylglutathione derivatives. Upon the hydrolysis of the thioesters catalysed by glyoxalase II, inert (S)-α-hydroxy acids, that is, lactic acid, are then produced. Herein, we demonstrate highly enantioselective glyoxalase I mimic catalytic isomerization of in-situ-generated hemithioacetals, providing facile access to both enantiomers of α-hydroxy thioesters. Owing to the flexibility of thioesters, a family of optically pure α-hydroxyamides, which are highly important drug candidates in the pharmaceutical industry, were prepared without any coupling reagents. Similar to real enzymes, the enforced proximity of the catalyst and substrates by the chiral cage in situ formed by the incorporation of potassium salt can enhance the reactivity and efficiently transfer the stereochemical information.
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Affiliation(s)
- Sang Yeon Park
- Department of Chemistry, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi 440-746, Korea
| | - In-Soo Hwang
- Department of Chemistry, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi 440-746, Korea
| | - Hyun-Ju Lee
- Department of Chemistry, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi 440-746, Korea
| | - Choong Eui Song
- Department of Chemistry, Sungkyunkwan University, 2066, Seobu-ro, Jangan-gu, Suwon, Gyeonggi 440-746, Korea
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3
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Affiliation(s)
- Michael J Maroney
- Department of Chemistry, University of Massachusetts , Amherst, Massachusetts 01003, United States
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4
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Thibon A, Karmazin‐Brelot L, Mandon D. Coordination Versatility and Amide Shift in Mononuclear Fe
II
Complexes with the Asymmetrical Tripod [(6‐Bromo‐2‐pyridyl)methyl][(6‐pivaloylamido‐2‐pyridyl)methyl](2‐pyridylmethyl)amine (BrMPPA). Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201201284] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Aurore Thibon
- Laboratoire de Chimie Biomimétique des Métaux de Transition, UMR CNRS 7177, Institut de Chimie de Strasbourg, Université de Strasbourg, Bâtiment Le Bel, 4 Rue Blaise Pascal, CS 90032, 67081 Strasbourg Cedex, France, Fax: +33‐3‐68851438, http://institut‐chimie.unistra.fr/
| | - Lydia Karmazin‐Brelot
- Service de Radiocristallographie, UMR CNRS no. 7177, Institut de Chimie de Strasbourg et Université de Strasbourg, 1, rue Blaise Pascal, BP 296/R8, 67008 Strasbourg Cedex, France
| | - Dominique Mandon
- Laboratoire de Chimie Biomimétique des Métaux de Transition, UMR CNRS 7177, Institut de Chimie de Strasbourg, Université de Strasbourg, Bâtiment Le Bel, 4 Rue Blaise Pascal, CS 90032, 67081 Strasbourg Cedex, France, Fax: +33‐3‐68851438, http://institut‐chimie.unistra.fr/
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5
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Alimi M, Allam A, Selkti M, Tomas A, Roussel P, Galardon E, Artaud I. Characterization of Cobalt(III) Hydroxamic Acid Complexes Based on a Tris(2-pyridylmethyl)amine Scaffold: Reactivity toward Cysteine Methyl Ester. Inorg Chem 2012; 51:9350-6. [DOI: 10.1021/ic301090t] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mickael Alimi
- Laboratoire de Chimie et Biochimie
Pharmacologiques et Toxicologiques, UMR 8601 CNRS, Université Paris Descartes, Sorbonne Paris Cité, 45 rue
des Saints Pères, 75270 Paris Cedex 06, France
| | - Anas Allam
- Laboratoire de Chimie et Biochimie
Pharmacologiques et Toxicologiques, UMR 8601 CNRS, Université Paris Descartes, Sorbonne Paris Cité, 45 rue
des Saints Pères, 75270 Paris Cedex 06, France
| | - Mohamed Selkti
- Laboratoire de Crystallographie
et RMN Biologiques, UMR 8015 CNRS, Université Paris Descartes, Sorbonne Paris Cité, 4 avenue
de l’Observatoire, 75270 Paris Cedex 06, France
| | - Alain Tomas
- Laboratoire de Crystallographie
et RMN Biologiques, UMR 8015 CNRS, Université Paris Descartes, Sorbonne Paris Cité, 4 avenue
de l’Observatoire, 75270 Paris Cedex 06, France
| | - Pascal Roussel
- Unité de Catalyse et Chimie
du Solide, UMR 8012 CNRS, Ecole Nationale Supérieure de Chimie de Lille BP 90108, 59652 Villeneuve d’Ascq
Cedex, France
| | - Erwan Galardon
- Laboratoire de Chimie et Biochimie
Pharmacologiques et Toxicologiques, UMR 8601 CNRS, Université Paris Descartes, Sorbonne Paris Cité, 45 rue
des Saints Pères, 75270 Paris Cedex 06, France
| | - Isabelle Artaud
- Laboratoire de Chimie et Biochimie
Pharmacologiques et Toxicologiques, UMR 8601 CNRS, Université Paris Descartes, Sorbonne Paris Cité, 45 rue
des Saints Pères, 75270 Paris Cedex 06, France
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Ng GKY, Ziller JW, Borovik AS. Preparation and structures of dinuclear complexes containing M(II)-OH centers. Chem Commun (Camb) 2012; 48:2546-8. [PMID: 22288074 PMCID: PMC3777269 DOI: 10.1039/c2cc16277f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The synthesis of M(II)(2) complexes (M(II)=Co, Mn) with terminal hydroxo ligands has been achieved utilizing a dinucleating ligand containing a bridging pyrazolate unit and appended (neopentyl)aminopyridyl groups. Structural studies on the complexes revealed that the M(II)-OH units are positioned in a syn-configuration, placing the hydroxo ligands in close proximity (ca. 3 Å apart), which may be a prerequisite for water oxidation.
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Affiliation(s)
- Gary K.-Y. Ng
- Department of Chemistry, University of California-Irvine, 1102 Natural Science II, Irvine, CA 92697, USA
| | - Joseph W. Ziller
- Department of Chemistry, University of California-Irvine, 1102 Natural Science II, Irvine, CA 92697, USA
| | - A. S. Borovik
- Department of Chemistry, University of California-Irvine, 1102 Natural Science II, Irvine, CA 92697, USA
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Ng GKY, Ziller JW, Borovik AS. Structural diversity in metal complexes with a dinucleating ligand containing carboxyamidopyridyl groups. Inorg Chem 2011; 50:7922-4. [PMID: 21793511 DOI: 10.1021/ic200881t] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The synthesis of a (carboxyamido)pyridinepyrazolate (H(5)bppap) dinucleating ligand is described. Bimetallic iron and cobalt complexes of H(5)bppap ([M(II)(2)H(2)bppap](+)) showed structural differences in both their primary and secondary coordination spheres. The binding of small molecules into the preorganized ligand cavity is verified by the hydration of [Fe(II)(2)H(2)bppap](+) and [Co(II)(2)H(2)bppap](+), leading to the formation of complexes [{Co(II)(OH)}Co(II)H(3)bppap](+) and [{Fe(II)(OH)}Fe(II)H(3)bppap](+), in which one of the metal centers has a terminal hydroxo ligand.
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Affiliation(s)
- Gary K-Y Ng
- Department of Chemistry, University of California-Irvine, 1102 Natural Science II, Irvine, California 92697, USA
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Shook RL, Peterson SM, Greaves J, Moore C, Rheingold AL, Borovik A. Catalytic reduction of dioxygen to water with a monomeric manganese complex at room temperature. J Am Chem Soc 2011; 133:5810-7. [PMID: 21425844 PMCID: PMC3381988 DOI: 10.1021/ja106564a] [Citation(s) in RCA: 120] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
There have been numerous efforts to incorporate dioxygen into chemical processes because of its economic and environmental benefits. The conversion of dioxygen to water is one such example, having importance in both biology and fuel cell technology. Metals or metal complexes are usually necessary to promote this type of reaction and several systems have been reported. However, mechanistic insights into this conversion are still lacking, especially the detection of intermediates. Reported herein is the first example of a monomeric manganese(II) complex that can catalytically convert dioxygen to water. The complex contains a tripodal ligand with two urea groups and one carboxyamidopyridyl unit; this ligand creates an intramolecular hydrogen-bonding network within the secondary coordination sphere that aids in the observed chemistry. The manganese(II) complex is five-coordinate with an N(4)O primary coordination sphere; the oxygen donor comes from the deprotonated carboxyamido moiety. Two key intermediates were detected and characterized: a peroxo-manganese(III) species and a hybrid oxo/hydroxo-manganese(III) species (1). The formulation of 1 was based on spectroscopic and analytical data, including an X-ray diffraction analysis. Reactivity studies showed dioxygen was catalytically converted to water in the presence of reductants, such as diphenylhydrazine and hydrazine. Water was confirmed as a product in greater than 90% yield. A mechanism was proposed that is consistent with the spectroscopy and product distribution, in which the carboxyamido group switches between a coordinated ligand and a basic site to scavenge protons produced during the catalytic cycle. These results highlight the importance of incorporating intramolecular functional groups within the secondary coordination sphere of metal-containing catalysts.
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Affiliation(s)
- Ryan L. Shook
- Department of Chemistry, University of California-Irvine, 1102 Natural Science II, Irvine, CA 92697-2025
| | - Sonja M. Peterson
- Department of Chemistry, University of California-Irvine, 1102 Natural Science II, Irvine, CA 92697-2025
| | - John Greaves
- Department of Chemistry, University of California-Irvine, 1102 Natural Science II, Irvine, CA 92697-2025
| | - Curtis Moore
- Department of Chemistry and Biochemistry, University of California-San Diego, San Diego, 92093-0332
| | - Arnold L. Rheingold
- Department of Chemistry and Biochemistry, University of California-San Diego, San Diego, 92093-0332
| | - A.S. Borovik
- Department of Chemistry, University of California-Irvine, 1102 Natural Science II, Irvine, CA 92697-2025
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9
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Powell-Jia DA, Pham MTN, Ziller JW, Borovik AS. Nickel(II) complexes stabilized by bis[N-(6-pivalamido-2-pyridylmethyl)]benzylamine: Synthesis and characterization of complexes stabilized by a hydrogen bonding network. Inorganica Chim Acta 2010; 363:2728-2733. [PMID: 22745511 PMCID: PMC3382998 DOI: 10.1016/j.ica.2010.05.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hydrogen bonds in metalloproteins are key in directing reactivity yet to be achieved in synthetic systems. We have been developing a synthetic system that uses hydrogen-bonding interactions to modulate the secondary coordination around a transition metal ion. This was accomplished with the ligand bis[N-(6-pivalamido-2-pyridylmethyl)]benzylamine (H(2)pmb), which contains two carboxyamido units appended from pyridine rings. Several nickel complexes were prepared and structurally characterized. In particular, we found that the appended carboxyamido groups either provide intramolecular H-bond donors or can be converted to bind directly to a metal center. We established that the complex Ni(II)H(2)pmb(Cl)(2) can be sequentially deprotonated with potassium tert-butoxide, causing coordination of the carboxyamido oxygen atoms and concomitant loss of the chloro ligands. The chloro ligands were also removed with silver(I) salts-in the presence of acetate ions, the complex Ni(II)H(2)pmb(κ(2)-OAc)(κ(1)-OAc) was isolated, in which an intramolecular H-bonding network occurs between the H(2)pmb ligand and the coordinate acetato ligands.
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Affiliation(s)
- Darla A Powell-Jia
- Department of Chemistry, University of California Irvine, 1102 Natural Science II, Irvine, CA 92697 USA
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10
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Park YJ, Sickerman NS, Ziller JW, Borovik A. Utilizing tautomerization of 2-amino-oxazoline in hydrogen bonding tripodal ligands. Chem Commun (Camb) 2010; 46:2584-6. [PMID: 20449315 PMCID: PMC3777267 DOI: 10.1039/c000160k] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A tetradentate tripodal ligand containing 2-amino-oxazoline moieties has been developed. This system tautomerizes upon chelation of a metal ion, forming a flexible cavity capable of accommodating ligands via an intramolecular hydrogen bonding network.
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Affiliation(s)
- Young Jun Park
- Department of Chemistry, University of California-Irvine, 1102 Natural Science II, Irvine, CA 92697, USA
| | - Nathaniel S. Sickerman
- Department of Chemistry, University of California-Irvine, 1102 Natural Science II, Irvine, CA 92697, USA
| | - Joseph W. Ziller
- Department of Chemistry, University of California-Irvine, 1102 Natural Science II, Irvine, CA 92697, USA
| | - A.S. Borovik
- Department of Chemistry, University of California-Irvine, 1102 Natural Science II, Irvine, CA 92697, USA
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11
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Jones MB, Newell BS, Hoffert WA, Hardcastle KI, Shores MP, MacBeth CE. Chelating tris(amidate) ligands: versatile scaffolds for nickel(ii). Dalton Trans 2010:401-10. [DOI: 10.1039/b914301g] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Danford JJ, Dobrowolski P, Berreau LM. Thioester Hydrolysis Reactivity of an Fe(III)Zn(II) Complex. Inorg Chem 2009; 48:11352-61. [DOI: 10.1021/ic901890d] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- James J. Danford
- Department of Chemistry & Biochemistry, Utah State University, Logan, Utah 84322-0300
| | - Piotr Dobrowolski
- Department of Chemistry & Biochemistry, Utah State University, Logan, Utah 84322-0300
| | - Lisa M. Berreau
- Department of Chemistry & Biochemistry, Utah State University, Logan, Utah 84322-0300
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13
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Rudzka K, Arif AM, Berreau LM. A trinuclear nickel(II) enediolate complex: synthesis, characterization, and O2 reactivity. Inorg Chem 2009; 47:10832-40. [PMID: 18959363 DOI: 10.1021/ic800947z] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Using a new N(4)-donor chelate ligand having a mixture of hydrophobic phenyl and hydrogen-bond-donor appendages, a trinuclear nickel(II) complex of the doubly deprotonated form of 2-hydroxy-1,3-diphenylpropane-1,3-dione was isolated, characterized (X-ray crystallography, elemental analysis, UV-vis, (1)H NMR, FTIR, and magnetic moment measurement), and evaluated for O(2) reactivity. This complex, [(6-NA-6-Ph(2)TPANi)(2)(mu-PhC(O)C(O)C(O)Ph)(2)Ni](ClO(4))(2) (4), has two terminal pseudooctahedral Ni(II) centers supported by the tetradentate chelate ligand and a central square-planar Ni(II) ion ligated by oxygen atoms of two bridging enediolate ligands. In CH(3)CN, 4 exhibits a deep orange/brown color and lambda(max) = 463 nm (epsilon = 16 000 M(-1)cm(-1)). The room temperature magnetic moment of 4, determined by Evans method, is mu(eff) = 5.3(2) mu(B). This is consistent with the presence of two noninteracting high-spin Ni(II) centers, a diamagnetic central Ni(II) ion, and an overall quintet ground state. Exposure of a CH(3)CN solution of 4 to O(2) results in the rapid loss of the orange/brown color to give a green solution. The products identified from this reaction are [(kappa(3)-6-NA-6-Ph(2)TPA)Ni(O(2)Ph)(H(2)O)]ClO(4) (5), benzil [PhC(O)C(O)Ph], and CO. Identification of 5 was achieved via its independent synthesis and a comparison of its (1)H NMR and mass spectral features with those of the 6-NA-6-Ph(2)TPA-containing product generated upon reaction of 4 with O(2). The independently prepared sample of 5 was characterized by X-ray crystallography, elemental analysis, UV-vis, mass spectrometry, and FTIR. The O(2) reactivity of 4 has relevance to the active-site chemistry of Ni(II)-containing acireductone dioxygenase (Ni(II)ARD).
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Affiliation(s)
- Katarzyna Rudzka
- Department of Chemistry and Biochemistry, Utah State University, Logan, Utah 84322-0300, USA
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14
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Shook RL, Gunderson WA, Greaves J, Ziller JW, Hendrich MP, Borovik AS. A monomeric Mn(III)-peroxo complex derived directly from dioxygen. J Am Chem Soc 2008; 130:8888-9. [PMID: 18570414 DOI: 10.1021/ja802775e] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The binding and activation of dioxygen by transition metal complexes is a fundamentally and practically important process in chemistry. Often the initial steps involve formation of peroxometal species that is difficult to observe because of their inherent reactivity. The interaction of dioxygen with a manganese(II) complex (1) of bis[(N'-tert-butylurealy)-N-ethyl]-(6-pivalamido-2-pyridylmethyl)amine was investigated, leading to the detection of a new intermediate that is a peroxomanganese(III) complex (2). This complex is high-spin (S = 2) with a g value of 8.2 and D = -2.0(5) as determined by parallel-mode electron paramagnetic resonance spectroscopy. The coordination of a peroxo ligand was established using Fourier transform infrared spectroscopy that reveals a new signal at 885 cm-1 for 2 when formed from 16O2-this band shifts to 837 cm-1 when 18O2 is used in the preparation. Moreover, electrospray ionization mass spectra contain a strong ion at an m/z of 576.2703 for the 16O-isotopomer that shifts to 580.2794 in the 18O-isotopomer. Complex 2 also is capable of oxidatively deformylating aldehydes, which is a known reaction of peroxometal complexes. The similarities of 2 to the peroxo intermediates in cytochrome P450 are noted.
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Affiliation(s)
- Ryan L Shook
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, California 92697-2025, USA
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Berreau LM. COORDINATION AND BIOINORGANIC CHEMISTRY OF ARYL-APPENDED TRIS(2-PYRIDYLMETHYL)AMINE LIGANDS. COMMENT INORG CHEM 2007. [DOI: 10.1080/02603590701572940] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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