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Desnoyer AN, Nicolay A, Rios P, Ziegler MS, Tilley TD. Bimetallics in a Nutshell: Complexes Supported by Chelating Naphthyridine-Based Ligands. Acc Chem Res 2020; 53:1944-1956. [PMID: 32878429 DOI: 10.1021/acs.accounts.0c00382] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Bimetallic motifs are a structural feature common to some of the most effective and synthetically useful catalysts known, including in the active sites of many metalloenzymes and on the surfaces of industrially relevant heterogeneous materials. However, the complexity of these systems often hampers detailed studies of their fundamental properties. To glean valuable mechanistic insight into how these catalysts function, this research group has prepared a family of dinucleating 1,8-naphthyridine ligands that bind two first-row transition metals in close proximity, originally designed to help mimic the proposed active site of metal oxide surfaces. Of the various bimetallic combinations examined, dicopper(I) is particularly versatile, as neutral bridging ligands adopt a variety of different binding modes depending on the configuration of frontier orbitals available to interact with the Cu centers. Organodicopper complexes are readily accessible, either through the traditional route of salt metathesis or via the activation of tetraarylborate anions through aryl group abstraction by a dicopper(I) unit. The resulting bridging aryl complexes engage in C-H bond activations, notably with terminal alkynes to afford bridging alkynyl species. The μ-hydrocarbyl complexes are surprisingly tolerant of water and elevated temperatures. This stability was leveraged to isolate a species that typically represents a fleeting intermediate in Cu-catalyzed azide-alkyne coupling (CuAAC); reaction of a bridging alkynyl complex with an organic azide afforded the first example of a well-defined, symmetrically bridged dicopper triazolide. This complex was shown to be an intermediate during CuAAC, providing support for a proposed bimetallic mechanism. These platforms are not limited to formally low oxidation states; chemical oxidation of the hydrocarbyl complexes cleanly results in formation of mixed valence CuICuII complexes with varying degrees of distortion in both the bridging moiety and the dicopper core. Higher oxidation states, e.g., dicopper(II), are easily accessed via oxidation of a dicopper(I) compound with air to give a CuII2(μ-OH)2 complex. Reduction of this compound with silanes resulted in the unexpected formation of pentametallic copper(I) dihydride clusters or trimetallic monohydride complexes, depending on the nature of the silane. Finally, development of an unsymmetrical naphthyridine ligand with mixed donor side-arms enables selective synthesis of an isostructural series of six heterobimetallic complexes, demonstrating the power of ligand design in the preparation of heterometallic assemblies.
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Affiliation(s)
- Addison N. Desnoyer
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Amélie Nicolay
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Pablo Rios
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460, United States
| | - Micah S. Ziegler
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - T. Don Tilley
- Department of Chemistry, University of California, Berkeley, Berkeley, California 94720-1460, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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Sarkar M, Pandey P, Bera JK. Chiral 1,8-naphthyridine based ligands: Syntheses and characterization of Di- and tetranuclear copper (I) and silver (I) complexes. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2018.11.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Tomilov YV, Menchikov LG, Novikov RA, Ivanova OA, Trushkov IV. Methods for the synthesis of donor-acceptor cyclopropanes. RUSSIAN CHEMICAL REVIEWS 2018. [DOI: 10.1070/rcr4787] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Jin Q, Li J, Ariafard A, Canty AJ, O'Hair RA. Substituent effects in the decarboxylation reactions of coordinated arylcarboxylates in dinuclear copper complexes, [(napy)Cu 2(O 2CC 6H 4X)] + †. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2017; 23:351-358. [PMID: 29183196 DOI: 10.1177/1469066717729067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A combination of gas-phase ion trap mass spectrometry experiments and density functional theory (DFT) calculations have been used to examine the role of substituents on the decarboxylation of 25 different coordinated aromatic carboxylates in binuclear complexes, [(napy)Cu2(O2CC6H4X)]+, where napy is the ligand 1,8-naphthyridine (molecular formula, C8H6N2) and X = H and the ortho ( o), meta ( m) and para ( p) isomers of F, Br, CN, NO2, CF3, OAc, Me and MeO. Two competing unimolecular reaction pathways were found: decarboxylation to give the organometallic cation [(napy)Cu2(C6H4X)]+ or loss of the neutral copper benzoate to yield [(napy)Cu]+. The substituents on the aryl group influence the branching ratios of these product channels, but decarboxylation is always the dominant pathway. Density functional theory calculations reveal that decarboxylation proceeds via two transition states. The first enables a change in the coordination mode of the coordinated benzoate in [(napy)Cu2(O2CC6H4X)]+ from the thermodynamically favoured O, O-bridged form to the O-bound form, which is the reactive conformation for the second transition state which involves extrusion of CO2 with concomitant formation of the CO2 coordinated organometallic cation, [(napy)Cu2(C6H4X)(CO2)]+, which then loses CO2 in the final step to yield [(napy)Cu2(C6H4X)]+. In all cases the barrier is highest for the second transition state. The o-substituted benzoates show a lower activation energy than the m-substituted ones, while the p-substituted ones have the highest energy, which is consistent with the experimentally determined normalised collision energy required to induce fragmentation of [(napy)Cu2(O2CC6H4X)]+.
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Affiliation(s)
- Qiuyan Jin
- 1 School of Chemistry and Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Victoria, Australia
| | - Jiaye Li
- 1 School of Chemistry and Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Victoria, Australia
| | - Alireza Ariafard
- 1 School of Chemistry and Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Victoria, Australia
- 2 Department of Chemistry, Faculty of Science, Central Tehran Branch, Islamic Azad University , Tehran, Iran
| | - Allan J Canty
- 3 School of Physical Sciences, University of Tasmania, Hobart, Tasmania, Australia
| | - Richard Aj O'Hair
- 1 School of Chemistry and Bio21 Institute of Molecular Science and Biotechnology, The University of Melbourne, Victoria, Australia
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Dutta I, De S, Yadav S, Mondol R, Bera JK. Aerobic oxidative coupling of alcohols and amines towards imine formation by a dicopper(I,I) catalyst. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.05.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Reactivity and Catalysis at Sites Trans to the [Ru–Ru] Bond. TOP ORGANOMETAL CHEM 2015. [DOI: 10.1007/3418_2015_162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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Saha B, Wahidur Rahaman SM, Daw P, Sengupta G, Bera JK. Metal–Ligand Cooperation on a Diruthenium Platform: Selective Imine Formation through Acceptorless Dehydrogenative Coupling of Alcohols with Amines. Chemistry 2014; 20:6542-51. [DOI: 10.1002/chem.201304403] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2013] [Indexed: 12/31/2022]
Affiliation(s)
- Biswajit Saha
- Department of Chemistry, Center for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016 (India), Fax: (+91) 512‐2597436
| | - S. M. Wahidur Rahaman
- Department of Chemistry, Center for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016 (India), Fax: (+91) 512‐2597436
| | - Prosenjit Daw
- Department of Chemistry, Center for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016 (India), Fax: (+91) 512‐2597436
| | - Gargi Sengupta
- Department of Chemistry, Center for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016 (India), Fax: (+91) 512‐2597436
| | - Jitendra K. Bera
- Department of Chemistry, Center for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016 (India), Fax: (+91) 512‐2597436
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Paul A, Gupta RK, Dubey M, Sharma G, Koch B, Hundal G, Hundal MS, Pandey DS. Potential apoptosis inducing agents based on a new benzimidazole schiff base ligand and its dicopper(ii) complex. RSC Adv 2014. [DOI: 10.1039/c4ra08680e] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Synthesis, characterization and DNA/protein binding studies of new benzimidazole based dicopper(ii) complex inducing apoptosis in MCF-7 cells have been presented.
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Affiliation(s)
- Anup Paul
- Departments of Chemistry and
- Banaras Hindu University
- Varanasi-221 005, India
| | - Rakesh Kumar Gupta
- Departments of Chemistry and
- Banaras Hindu University
- Varanasi-221 005, India
| | - Mrigendra Dubey
- Departments of Chemistry and
- Banaras Hindu University
- Varanasi-221 005, India
| | - Gunjan Sharma
- Zoology
- Faculty of Science
- Banaras Hindu University
- Varanasi-221 005, India
| | - Biplob Koch
- Zoology
- Faculty of Science
- Banaras Hindu University
- Varanasi-221 005, India
| | - Geeta Hundal
- Department of Chemistry
- Guru Nanak Dev University
- Amritsar-143005, India
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Daw P, Ghatak T, Doucet H, Bera JK. Cyclometalations on the Imidazo[1,2-a][1,8]naphthyridine Framework. Organometallics 2013. [DOI: 10.1021/om4004658] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Prosenjit Daw
- Department
of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Tapas Ghatak
- Department
of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Henri Doucet
- Institut Sciences Chimiques de Rennes, UMR 6226 CNRS-Université de Rennes, “Catalyse
et Organometalliques”, Campus de Beaulieu, 35042 Rennes, France
| | - Jitendra K. Bera
- Department
of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
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Quast H, Walter Stawitz J, Mueller B. Synthesis, Reactions, and Rearrangements of 2,4-Diazabicyclo[3.1.0]hexan-3-ones. HETEROCYCLES 2012. [DOI: 10.3987/com-12-12543] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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