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Saha R, Hembram BC, Panda S, Jana NC, Bagh B. Iron- and base-catalyzed C(α)-alkylation and one-pot sequential alkylation-hydroxylation of oxindoles with secondary alcohols. Org Biomol Chem 2024; 22:6321-6330. [PMID: 39039931 DOI: 10.1039/d4ob00957f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/24/2024]
Abstract
The utilization of economical and environmentally benign transition metals in crucial catalytic processes is pivotal for sustainable advancement in synthetic organic chemistry. Iron, as the most abundant transition metal in the Earth's crust, has gained significant attention for this purpose. A combination of FeCl2 (5 mol%) in the presence of phenanthroline (10 mol%) and NaOtBu (1.5 equivalent) proved effective for the C(α)-alkylation of oxindole, employing challenging secondary alcohol as a non-hazardous alkylating agent. The C(α)-alkylation of oxindole was optimized in green solvent or under neat conditions. The substrate scope encompasses a broad array of substituted oxindoles with various secondary alcohols. Further post-functionalization of the C(α)-alkylated oxindole products demonstrated the practical utility of this catalytic alkylation. One-pot C-H hydroxylation of alkylated oxindoles yielded 3-alkyl-3-hydroxy-2-oxindoles using air as the most sustainable oxidant. Low E-factors (3.61 to 4.19) and good Eco-scale scores (74 to 76) of these sustainable catalytic protocols for the alkylation and one-pot sequential alkylation-hydroxylation of oxindoles demonstrated minimum waste generation. Plausible catalytic paths are proposed on the basis of past reports and control experiments, which suggested that a borrowing hydrogen pathway is involved in this alkylation.
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Affiliation(s)
- Ratnakar Saha
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, Jatni, Khurda, Odisha, PIN 752050, India.
| | - Bhairab Chand Hembram
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, Jatni, Khurda, Odisha, PIN 752050, India.
| | - Surajit Panda
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, Jatni, Khurda, Odisha, PIN 752050, India.
| | - Narayan Ch Jana
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, Jatni, Khurda, Odisha, PIN 752050, India.
| | - Bidraha Bagh
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, Jatni, Khurda, Odisha, PIN 752050, India.
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2
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Dupont J, Leal BC, Lozano P, Monteiro AL, Migowski P, Scholten JD. Ionic Liquids in Metal, Photo-, Electro-, and (Bio) Catalysis. Chem Rev 2024; 124:5227-5420. [PMID: 38661578 DOI: 10.1021/acs.chemrev.3c00379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Ionic liquids (ILs) have unique physicochemical properties that make them advantageous for catalysis, such as low vapor pressure, non-flammability, high thermal and chemical stabilities, and the ability to enhance the activity and stability of (bio)catalysts. ILs can improve the efficiency, selectivity, and sustainability of bio(transformations) by acting as activators of enzymes, selectively dissolving substrates and products, and reducing toxicity. They can also be recycled and reused multiple times without losing their effectiveness. ILs based on imidazolium cation are preferred for structural organization aspects, with a semiorganized layer surrounding the catalyst. ILs act as a container, providing a confined space that allows modulation of electronic and geometric effects, miscibility of reactants and products, and residence time of species. ILs can stabilize ionic and radical species and control the catalytic activity of dynamic processes. Supported IL phase (SILP) derivatives and polymeric ILs (PILs) are good options for molecular engineering of greener catalytic processes. The major factors governing metal, photo-, electro-, and biocatalysts in ILs are discussed in detail based on the vast literature available over the past two and a half decades. Catalytic reactions, ranging from hydrogenation and cross-coupling to oxidations, promoted by homogeneous and heterogeneous catalysts in both single and multiphase conditions, are extensively reviewed and discussed considering the knowledge accumulated until now.
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Affiliation(s)
- Jairton Dupont
- Institute of Chemistry - Universidade Federal do Rio Grande do Sul - UFRGS, Avenida Bento Gonçalves, 9500, Porto Alegre 91501-970 RS, Brasil
- Departamento de Bioquímica y Biología Molecular B e Inmunología, Facultad de Química, Universidad de Murcia, P.O. Box 4021, E-30100 Murcia, Spain
| | - Bárbara C Leal
- Institute of Chemistry - Universidade Federal do Rio Grande do Sul - UFRGS, Avenida Bento Gonçalves, 9500, Porto Alegre 91501-970 RS, Brasil
| | - Pedro Lozano
- Departamento de Bioquímica y Biología Molecular B e Inmunología, Facultad de Química, Universidad de Murcia, P.O. Box 4021, E-30100 Murcia, Spain
| | - Adriano L Monteiro
- Institute of Chemistry - Universidade Federal do Rio Grande do Sul - UFRGS, Avenida Bento Gonçalves, 9500, Porto Alegre 91501-970 RS, Brasil
| | - Pedro Migowski
- Institute of Chemistry - Universidade Federal do Rio Grande do Sul - UFRGS, Avenida Bento Gonçalves, 9500, Porto Alegre 91501-970 RS, Brasil
| | - Jackson D Scholten
- Institute of Chemistry - Universidade Federal do Rio Grande do Sul - UFRGS, Avenida Bento Gonçalves, 9500, Porto Alegre 91501-970 RS, Brasil
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Nishiori D, Menzel JP, Armada N, Reyes Cruz EA, Nannenga BL, Batista VS, Moore GF. Breaking a Molecular Scaling Relationship Using an Iron-Iron Fused Porphyrin Electrocatalyst for Oxygen Reduction. J Am Chem Soc 2024; 146:11622-11633. [PMID: 38639470 DOI: 10.1021/jacs.3c08586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2024]
Abstract
The design of efficient electrocatalysts is limited by scaling relationships governing trade-offs between thermodynamic and kinetic performance metrics. This ″iron law″ of electrocatalysis arises from synthetic design strategies, where structural alterations to a catalyst must balance nucleophilic versus electrophilic character. Efforts to circumvent this fundamental impasse have focused on bioinspired applications of extended coordination spheres and charged sites proximal to a catalytic center. Herein, we report evidence for breaking a molecular scaling relationship involving electrocatalysis of the oxygen reduction reaction (ORR) by leveraging ligand design. We achieve this using a binuclear catalyst (a diiron porphyrin), featuring a macrocyclic ligand with extended electronic conjugation. This ligand motif delocalizes electrons across the molecular scaffold, improving the catalyst's nucleophilic and electrophilic character. As a result, our binuclear catalyst exhibits low overpotential and high catalytic turnover frequency, breaking the traditional trade-off between these two metrics.
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Affiliation(s)
- Daiki Nishiori
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287-1604, United States
- Center for Applied Structural Discovery (CASD), The Biodesign Institute, Arizona State University, Tempe, Arizona 85281, United States
| | - Jan Paul Menzel
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
| | - Nicholas Armada
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287-1604, United States
- Center for Applied Structural Discovery (CASD), The Biodesign Institute, Arizona State University, Tempe, Arizona 85281, United States
| | - Edgar A Reyes Cruz
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287-1604, United States
- Center for Applied Structural Discovery (CASD), The Biodesign Institute, Arizona State University, Tempe, Arizona 85281, United States
| | - Brent L Nannenga
- Center for Applied Structural Discovery (CASD), The Biodesign Institute, Arizona State University, Tempe, Arizona 85281, United States
- Chemical Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, Arizona 85287, United States
| | - Victor S Batista
- Department of Chemistry, Yale University, New Haven, Connecticut 06520-8107, United States
- Energy Sciences Institute, Yale University, West Haven, Connecticut 06516, United States
| | - Gary F Moore
- School of Molecular Sciences, Arizona State University, Tempe, Arizona 85287-1604, United States
- Center for Applied Structural Discovery (CASD), The Biodesign Institute, Arizona State University, Tempe, Arizona 85281, United States
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4
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Singh A, Roy L. Evolution in the Design of Water Oxidation Catalysts with Transition-Metals: A Perspective on Biological, Molecular, Supramolecular, and Hybrid Approaches. ACS OMEGA 2024; 9:9886-9920. [PMID: 38463281 PMCID: PMC10918817 DOI: 10.1021/acsomega.3c07847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Revised: 02/05/2024] [Accepted: 02/07/2024] [Indexed: 03/12/2024]
Abstract
Increased demand for a carbon-neutral sustainable energy scheme augmented by climatic threats motivates the design and exploration of novel approaches that reserve intermittent solar energy in the form of chemical bonds in molecules and materials. In this context, inspired by biological processes, artificial photosynthesis has garnered significant attention as a promising solution to convert solar power into chemical fuels from abundantly found H2O. Among the two redox half-reactions in artificial photosynthesis, the four-electron oxidation of water according to 2H2O → O2 + 4H+ + 4e- comprises the major bottleneck and is a severe impediment toward sustainable energy production. As such, devising new catalytic platforms, with traditional concepts of molecular, materials and biological catalysis and capable of integrating the functional architectures of the natural oxygen-evolving complex in photosystem II would certainly be a value-addition toward this objective. In this review, we discuss the progress in construction of ideal water oxidation catalysts (WOCs), starting with the ingenuity of the biological design with earth-abundant transition metal ions, which then diverges into molecular, supramolecular and hybrid approaches, blurring any existing chemical or conceptual boundaries. We focus on the geometric, electronic, and mechanistic understanding of state-of-the-art homogeneous transition-metal containing molecular WOCs and summarize the limiting factors such as choice of ligands and predominance of environmentally unrewarding and expensive noble-metals, necessity of high-valency on metal, thermodynamic instability of intermediates, and reversibility of reactions that create challenges in construction of robust and efficient water oxidation catalyst. We highlight how judicious heterogenization of atom-efficient molecular WOCs in supramolecular and hybrid approaches put forth promising avenues to alleviate the existing problems in molecular catalysis, albeit retaining their fascinating intrinsic reactivities. Taken together, our overview is expected to provide guiding principles on opportunities, challenges, and crucial factors for designing novel water oxidation catalysts based on a synergy between conventional and contemporary methodologies that will incite the expansion of the domain of artificial photosynthesis.
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Affiliation(s)
- Ajeet
Kumar Singh
- Institute of Chemical Technology
Mumbai−IOC Odisha Campus Bhubaneswar, IIT Kharagpur Extension
Centre, Bhubaneswar − 751013 India
| | - Lisa Roy
- Institute of Chemical Technology
Mumbai−IOC Odisha Campus Bhubaneswar, IIT Kharagpur Extension
Centre, Bhubaneswar − 751013 India
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5
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Jeddi N, Scott NWJ, Tanner T, Beaumont SK, Fairlamb IJS. Evidence for Suzuki-Miyaura cross-couplings catalyzed by ligated Pd 3-clusters: from cradle to grave. Chem Sci 2024; 15:2763-2777. [PMID: 38404373 PMCID: PMC10882490 DOI: 10.1039/d3sc06447f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 01/08/2024] [Indexed: 02/27/2024] Open
Abstract
Pdn clusters offer unique selectivity and exploitable reactivity in catalysis. Understanding the behavior of Pdn clusters is thus critical for catalysis, applied synthetic organic chemistry and greener outcomes for precious Pd. The Pd3 cluster, [Pd3(μ-Cl)(μ-PPh2)2(PPh3)3][Cl] (denoted as Pd3Cl2), which exhibits distinctive reactivity, was synthesized and immobilized on a phosphine-functionalized polystyrene resin (denoted as immob-Pd3Cl2). The resultant material served as a tool to study closely the role of Pd3 clusters in a prototypical Suzuki-Miyaura cross-coupling of 4-fluoro-1-bromobenzene and 4-methoxyphenyl boronic acid at varying low Pd ppm concentrations (24, 45, and 68 ppm). Advanced heterogeneity tests such as Hg poisoning and the three-phase test showed that leached mononuclear or nanoparticulate Pd are unlikely to be the major active catalyst species under the reaction conditions tested. EXAFS/XANES analysis from (pre)catalyst and filtered catalysts during and after catalysis has shown the intactness of the triangular structure of the Pd3X2 cluster, with exchange of chloride (X) by bromide during catalytic turnover of bromoarene substrate. This finding is further corroborated by treatment of immob-Pd3Cl2 after catalyzing the Suzuki-Miyaura reaction with excess PPh3, which releases the cluster from the polymer support and so permits direct observation of [Pd3(μ-Br)(μ-PPh2)2(PPh3)3]+ ions by ESI-MS. No evidence is seen for a proposed intermediate in which the bridging halogen on the Pd3 motif is replaced by an aryl group from the organoboronic acid, i.e. formed by a transmetallation-first process. Our findings taken together indicate that the 'Pd3X2' motif is an active catalyst species, which is stabilized by being immobilized, providing a more robust Pd3 cluster catalyst system. Non-immobilized Pd3Cl2 is less stable, as is followed by stepwise XAFS of the non-immobilized Pd3Cl2, which gradually changes to a species consistent with 'Pdx(PPh3)y' type material. Our findings have far-reaching future implications for Pd3 cluster involvement in catalysis, showing that immobilization of Pd3 cluster species offers advantages for rigorous mechanistic examination and applied chemistries.
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Affiliation(s)
- Neda Jeddi
- Department of Chemistry, University of York York YO20 5DD UK
| | - Neil W J Scott
- Department of Chemistry, University of York York YO20 5DD UK
| | - Theo Tanner
- Department of Chemistry, University of York York YO20 5DD UK
| | - Simon K Beaumont
- Department of Chemistry, Durham University South Road Durham DH1 3LE UK
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6
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Chen H, Yang W, Zhang J, Lu B, Wang X. Divergent Geminal Alkynylation-Allylation and Acylation-Allylation of Carbenes: Evolution and Roles of Two Transition-Metal Catalysts. J Am Chem Soc 2024; 146:4727-4740. [PMID: 38330247 DOI: 10.1021/jacs.3c12162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2024]
Abstract
Cooperative bimetallic catalysis to access novel reactivities is a powerful strategy for reaction development in transition-metal-catalyzed chemistry. Particularly, elucidation of the evolution of two transition-metal catalysts and understanding their roles in dual catalysis are among the most fundamental goals for bimetallic catalysis. Herein, a novel three-component reaction of a terminal alkyne, a diazo ester, and an allylic carbonate was successfully developed via cooperative Cu/Rh catalysis with Xantphos as the ligand, providing a highly efficient strategy to access 1,5-enynes with an all-carbon quaternary center that can be used as immediate synthetic precursors for complex cyclic molecules. Notably, a Meyer-Schuster rearrangement was involved in the reactions using propargylic alcohols, resulting in an unprecedented acylation-allylation of carbenes. Mechanistic studies suggested that in the course of the reaction Cu(I) species might aggregate to some types of Cu clusters and nanoparticles (NPs), while the Rh(II)2 precursor can dissociate to mono-Rh species, wherein Cu NPs are proposed to be responsible for the alkynylation of carbenes and work in cooperation with Xantphos-coordinated dirhodium(II) or Rh(I)-catalyzed allylic alkylation.
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Affiliation(s)
- Hongda Chen
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Wenhan Yang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Jinyu Zhang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Bin Lu
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Xiaoming Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-Lane Xiangshan, Hangzhou 310024, China
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7
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Zhou MJ, Miao Y, Gu Y, Xie Y. Recent Advances in Reversible Liquid Organic Hydrogen Carrier Systems: From Hydrogen Carriers to Catalysts. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2024:e2311355. [PMID: 38374727 DOI: 10.1002/adma.202311355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 01/31/2024] [Indexed: 02/21/2024]
Abstract
Liquid organic hydrogen carriers (LOHCs) have gained significant attention for large-scale hydrogen storage due to their remarkable gravimetric hydrogen storage capacity (HSC) and compatibility with existing oil and gas transportation networks for long-distance transport. However, the practical application of reversible LOHC systems has been constrained by the intrinsic thermodynamic properties of hydrogen carriers and the performances of associated catalysts in the (de)hydrogenation cycles. To overcome these challenges, thermodynamically favored carriers, high-performance catalysts, and catalytic procedures need to be developed. Here, significant advances in recent years have been summarized, primarily centered on regular LOHC systems catalyzed by homogeneous and heterogeneous catalysts, including dehydrogenative aromatization of cycloalkanes to arenes and N-heterocyclics to N-heteroarenes, as well as reverse hydrogenation processes. Furthermore, with the development of metal complexes for dehydrogenative coupling, a new family of reversible LOHC systems based on alcohols is described that can release H2 under relatively mild conditions. Finally, views on the next steps and challenges in the field of LOHC technology are provided, emphasizing new resources for low-cost hydrogen carriers, high-performance catalysts, catalytic technologies, and application scenarios.
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Affiliation(s)
- Min-Jie Zhou
- Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Yulong Miao
- Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Yanwei Gu
- Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
| | - Yinjun Xie
- Key Laboratory of Advanced Fuel Cells and Electrolyzers Technology of Zhejiang Province, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, P. R. China
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8
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Gawron M, Gilch F, Schmidhuber D, Kelly JA, Horsley Downie TM, Jacobi von Wangelin A, Rehbein J, Wolf R. Counterion Effect in Cobaltate-Catalyzed Alkene Hydrogenation. Angew Chem Int Ed Engl 2024; 63:e202315381. [PMID: 38059406 DOI: 10.1002/anie.202315381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 12/05/2023] [Accepted: 12/06/2023] [Indexed: 12/08/2023]
Abstract
We show that countercations exert a remarkable influence on the ability of anionic cobaltate salts to catalyze challenging alkene hydrogenations. An evaluation of the catalytic properties of [Cat][Co(η4 -cod)2 ] (Cat=K (1), Na (2), Li (3), (Dep nacnac)Mg (4), and N(n Bu)4 (5); cod=1,5-cyclooctadiene, Dep nacnac={2,6-Et2 C6 H3 NC(CH3 )}2 CH)]) demonstrated that the lithium salt 3 and magnesium salt 4 drastically outperform the other catalysts. Complex 4 was the most active catalyst, which readily promotes the hydrogenation of highly congested alkenes under mild conditions. A plausible catalytic mechanism is proposed based on density functional theory (DFT) investigations. Furthermore, combined molecular dynamics (MD) simulation and DFT studies were used to examine the turnover-limiting migratory insertion step. The results of these studies suggest an active co-catalytic role of the counterion in the hydrogenation reaction through the coordination to cobalt hydride intermediates.
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Affiliation(s)
- Martin Gawron
- Institute of Inorganic Chemistry, University of Regensburg, 93040, Regensburg, Germany
| | - Franziska Gilch
- Institute of Inorganic Chemistry, University of Regensburg, 93040, Regensburg, Germany
| | - Daniel Schmidhuber
- Institute of Organic Chemistry, University of Regensburg, 93040, Regensburg, Germany
| | - John A Kelly
- Institute of Inorganic Chemistry, University of Regensburg, 93040, Regensburg, Germany
| | | | | | - Julia Rehbein
- Institute of Organic Chemistry, University of Regensburg, 93040, Regensburg, Germany
| | - Robert Wolf
- Institute of Inorganic Chemistry, University of Regensburg, 93040, Regensburg, Germany
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9
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Hassan A, Baghel AS, Kumar A, Das N. Palladium(II)-immobilized Triptycene based Hypercrosslinked Polymers: An Efficient, Green, and Reusable Heterogenous Catalyst for Suzuki-Miyaura Cross-coupling Reaction. Chem Asian J 2024; 19:e202300778. [PMID: 37950487 DOI: 10.1002/asia.202300778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 11/06/2023] [Accepted: 11/10/2023] [Indexed: 11/12/2023]
Abstract
The Suzuki-Miyaura cross-coupling (SMCC) involves the coupling of organohalides and organoboron molecules in the presence of Pd(II)-based catalysts. Often SMCC reactions employ homogenous catalysts. However, such homogenous SMCC reactions are associated with certain limitations which has motivated design of effective and sustainable Pd(II)-based heterogeneous catalytic systems. Herein, we report a systematic development of a Pd(II)-immobilized and triptycene based ionic hyper crosslinked polymer (Pd@TP-iHCP) and explored its application as a heterogeneous catalyst for SMCC reaction. Pd@TP-iHCP has ample N-heterocyclic carbene (NHC) pendants that anchor Pd(II) centres on the polymeric matrix. Pd@TP-iHCP was characterized satisfactorily using FT-IR, 13 C CP-MAS NMR, BET surface area analysis, SEM, EDX and HRTEM. The performance of Pd@TP-iHCP as a heterogeneous catalyst for SMCC reactions was explored using various combinations of aryl boronic acids and aryl halides. Experimental results show that Pd@TP-iHCP is associated with a moderately high surface area. It is an efficient catalyst for SMCC (in aqueous media) with a modest loading of 0.8 mol % Pd(II)-catalyst since high yields of the expected products were obtained in shorter time intervals. Pd@TP-iHCP also features excellent stability and catalyst recyclability since it could be re-used for several cycles without any significant decrease in catalytic efficiency.
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Affiliation(s)
- Atikur Hassan
- Department of Chemistry, Indian Institute of Technology Patna, Patna, 801106, Bihar, India
| | - Akanksha Singh Baghel
- Department of Chemistry, Indian Institute of Technology Patna, Patna, 801106, Bihar, India
| | - Amit Kumar
- Department of Chemistry, Indian Institute of Technology Patna, Patna, 801106, Bihar, India
| | - Neeladri Das
- Department of Chemistry, Indian Institute of Technology Patna, Patna, 801106, Bihar, India
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10
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Mironenko RM, Eremin DB, Ananikov VP. The phenomenon of "dead" metal in heterogeneous catalysis: opportunities for increasing the efficiency of carbon-supported metal catalysts. Chem Sci 2023; 14:14062-14073. [PMID: 38098715 PMCID: PMC10717466 DOI: 10.1039/d3sc04691e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Accepted: 10/24/2023] [Indexed: 12/17/2023] Open
Abstract
This review addresses the largely overlooked yet critical issue of "dead" metal in heterogeneous metal catalysts. "Dead" metal refers to the fraction of metal in a catalyst that remains inaccessible to reactants, significantly reducing the overall catalyst performance. As a representative example considered in detail here, this challenge is particularly relevant for carbon-supported metal catalysts, extensively employed in research and industrial settings. We explore key factors contributing to the formation of "dead" metal, including the morphology of the support, metal atom intercalation within the support layers, encapsulation of metal nanoparticles, interference by organic molecules during catalyst preparation, and dynamic behavior under microwave irradiation. Notably, the review outlines a series of strategic approaches to mitigate the occurrence of "dead" metal during catalyst preparation, thus boosting the catalyst efficiency. The knowledge gathered is important for enhancing the preparation of catalysts, especially those containing precious metals. Beyond the practical implications for catalyst design, this study introduces a novel perspective for understanding and optimizing the catalyst performance. The insights are expected to broadly impact different scientific disciplines, empowered with heterogeneous catalysis and driving innovation in energy, environmental science, and materials chemistry, among others. Exploring the "dead" metal phenomenon and potential mitigation strategies brings the field closer to the ultimate goal of high-efficiency, low-cost catalysis.
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Affiliation(s)
- Roman M Mironenko
- Center of New Chemical Technologies BIC Neftezavodskaya St. 54 Omsk 644040 Russia
| | - Dmitry B Eremin
- Bridge Institute and Department of Chemistry, University of Southern California Los Angeles 90089-3502 USA
- N. D. Zelinsky Institute of Organic Chemistry Leninsky Pr. 47 Moscow 119991 Russia https://AnanikovLab.ru
| | - Valentine P Ananikov
- Center of New Chemical Technologies BIC Neftezavodskaya St. 54 Omsk 644040 Russia
- N. D. Zelinsky Institute of Organic Chemistry Leninsky Pr. 47 Moscow 119991 Russia https://AnanikovLab.ru
- Saint Petersburg State University 7/9 Universitetskaya Nab. St. Petersburg 199034 Russia
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11
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Kashin AS, Prima DO, Arkhipova DM, Ananikov VP. An Unusual Microdomain Factor Controls Interaction of Organic Halides with the Palladium Phase and Influences Catalytic Activity in the Mizoroki-Heck Reaction. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2302999. [PMID: 37381097 DOI: 10.1002/smll.202302999] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 06/06/2023] [Indexed: 06/30/2023]
Abstract
In this work, using a combination of scanning and transmission electron microscopy (SEM and TEM), the transformations of palladium-containing species in imidazolium ionic liquids in reaction mixtures of the Mizoroki-Heck reaction and in related organic media are studied to understand a challenging question of the relative reactivity of organic halides as key substrates in modern catalytic technologies. The microscopy technique detects the formation of a stable nanosized palladium phase under the action of an aryl (Ar) halide capable of forming microcompartments in an ionic liquid. For the first time, the correlation between the reactivity of the aryl halide and the microdomain structure is observed: Ar-I (well-developed microdomains) > Ar-Br (microphase present) > Ar-Cl (minor amount of microphase). Previously, it is assumed that molecular level factors, namely, carbon-halogen bond strength and the ease of bond breakage, are the sole factors determining the reactivity of aryl halides in catalytic transformations. The present work reports a new factor connected with the nature of the organic substrates used and their ability to form a microdomain structure and concentrate metallic species, highlighting the importance of considering both the molecular and microscale properties of the reaction mixtures.
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Affiliation(s)
- Alexey S Kashin
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Darya O Prima
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Daria M Arkhipova
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Valentine P Ananikov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
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Lutz MDR, Zhong H, Trapp N, Morandi B. Synthesis and Reversible H
2
Activation by Coordinatively Unsaturated Rhodium NHC Complexes. Helv Chim Acta 2023. [DOI: 10.1002/hlca.202200199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Affiliation(s)
- Marius D. R. Lutz
- Laboratorium für Organische Chemie ETH Zürich CH-8093 Zürich Switzerland
| | - Hongyu Zhong
- Laboratorium für Organische Chemie ETH Zürich CH-8093 Zürich Switzerland
| | - Nils Trapp
- Laboratorium für Organische Chemie ETH Zürich CH-8093 Zürich Switzerland
| | - Bill Morandi
- Laboratorium für Organische Chemie ETH Zürich CH-8093 Zürich Switzerland
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13
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McCallum T. Heart of gold: enabling ligands for oxidative addition of haloorganics in Au(I)/Au(III) catalysed cross-coupling reactions. Org Biomol Chem 2023; 21:1629-1646. [PMID: 36727215 DOI: 10.1039/d3ob00002h] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The field of Au-catalysis has been an area rich with new discoveries due to the unique properties of the lustrous element. In the past decade, developments in Au(I)/Au(III) cross-coupling methodology have been made possible with the use of external oxidants that facilitate the challenging oxidation of Au(I) to Au(III) in a stable and catalytically competent fashion. Until recently, Au-chemistry was not known to undergo catalytic transformations that feature oxidative addition of haloarenes like those that were made famous by transition metals such as Pd and Ni. The discovery that ligand modification could facilitate the oxidative addition of Au(I) with haloorganics to provide Au(III) intermediates that are competent in other areas of catalysis (i.e. Lewis acid catalysis) has revolutionized this field and has led to the invention of new cross-coupling methodology. The recent advances at the leading edge in the emerging field of Au(I)/Au(III) catalysis under redox-neutral conditions are highlighted.
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Affiliation(s)
- Terry McCallum
- The Canadian Bank Note Company, Ottawa, Ontario, Canada.
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14
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Albéniz AC. Experimental Studies of Reaction Mechanisms in Organometallic Chemistry and Catalysis. Organometallics 2023. [DOI: 10.1021/acs.organomet.3c00072] [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]
Affiliation(s)
- Ana C. Albéniz
- IU CINQUIMA/Química Inorgánica, Universidad de Valladolid, 47071 Valladolid, Spain
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15
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Albino M, Burden TJ, Piras CC, Whitwood AC, Fairlamb IJS, Smith DK. Mechanically Robust Hybrid Gel Beads Loaded with "Naked" Palladium Nanoparticles as Efficient, Reusable, and Sustainable Catalysts for the Suzuki-Miyaura Reaction. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2023; 11:1678-1689. [PMID: 36778525 PMCID: PMC9906743 DOI: 10.1021/acssuschemeng.2c05484] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Revised: 01/05/2023] [Indexed: 05/27/2023]
Abstract
The increase in demand for Pd and its low abundance pose a significant threat to its future availability, rendering research into more sustainable Pd-based technologies essential. Herein, we report Pd scavenging mechanically robust hybrid gel beads composed of agarose, a polymer gelator (PG), and an active low-molecular-weight gelator (LMWG) based on 1,3:2,4-dibenzylidenesorbitol (DBS), DBS-CONHNH 2 . The robustness of the PG and the ability of the LMWG to reduce Pd(II) in situ to generate naked Pd(0) nanoparticles (PdNPs) combine within these gel beads to give them potential as practical catalysts for Suzuki-Miyaura cross-coupling reactions. The optimized gel beads demonstrate good reusability, green metrics, and most importantly the ability to sustain stirring, improving reaction times and energy consumption compared to previous examples. In contrast to previous reports, the leaching of palladium from these next-generation beads is almost completely eliminated. Additionally, for the first time, a detailed investigation of these Pd-loaded gel beads explains precisely how the nanoparticles are formed in situ without a stabilizing ligand. Further, detailed catalytic investigations demonstrate that catalysis occurs within the gel beads. Hence, these beads can essentially be considered as robust "nonligated" heterogeneous PdNP catalysts. Given the challenges in developing ligand-free, naked Pd nanoparticles as stable catalysts, these gel beads may have future potential for the development of easily used systems to perform chemical reactions in "kit" form.
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16
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Fan JQ, Yang Y, Tao CB, Li MB. Cadmium-Doped and Pincer Ligand-Modified Gold Nanocluster for Catalytic KA 2 Reaction. Angew Chem Int Ed Engl 2023; 62:e202215741. [PMID: 36478512 DOI: 10.1002/anie.202215741] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 12/05/2022] [Accepted: 12/05/2022] [Indexed: 12/12/2022]
Abstract
A gold nanocluster Au17 Cd2 (PNP)2 (SR)12 (PNP=2,6-bis(diphenylphosphinomethyl)pyridine, SR=4-MeOPhS) consisting of an icosahedral Au13 kernel, two Au2 CdS6 staple motifs, and two PNP pincer ligands has been designed, synthesized and well characterized. This cadmium and PNP pincer ligand co-modified gold nanocluster showed high catalytic efficiency in the KA2 reaction, featuring high TON, mild reaction conditions, broad substrate scope as well as catalyst recyclability. Comparison of the catalytic performance between Au17 Cd2 (PNP)2 (SR)12 and the structurally similar single cadmium (or PNP) modified gold nanoclusters demonstrates that the co-existence of the cadmium and PNP on the surface is crucial for the high catalytic activity of the gold nanocluster. This work would be enlightening for developing efficient catalysts for cascade reactions and discovering the catalytic potential of metal nanoclusters in organic transformations.
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Affiliation(s)
- Ji-Qiang Fan
- Institute of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei, 230601, P. R. China
| | - Ying Yang
- College of Materials and Chemical Engineering, West Anhui University, Lu'an, Anhui, 237015, P. R. China
| | - Cheng-Bo Tao
- Institute of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei, 230601, P. R. China
| | - Man-Bo Li
- Institute of Physical Science and Information Technology, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Anhui University, Hefei, 230601, P. R. China
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17
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Ikemoto S, Muratsugu S, Koitaya T, Tsuji Y, Das M, Yoshizawa K, Glorius F, Tada M. Coordination-Induced Trigger for Activity: N-Heterocyclic Carbene-Decorated Ceria Catalysts Incorporating Cr and Rh with Activity Induction by Surface Adsorption Site Control. J Am Chem Soc 2023; 145:1497-1504. [PMID: 36511728 DOI: 10.1021/jacs.2c07290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A coordination-induced trigger for catalytic activity is proposed on an N-heterocyclic carbene (NHC)-decorated ceria catalyst incorporating Cr and Rh (ICy-r-Cr0.19Rh0.06CeOz). ICy-r-Cr0.19Rh0.06CeOz was prepared by grafting 1,3-dicyclohexylimidazol-2-ylidene (ICy) onto H2-reduced Cr0.19Rh0.06CeOz (r-Cr0.19Rh0.06CeOz) surfaces, which went on to exhibit substantial catalytic activity for the 1,4-arylation of cyclohexenone with phenylboronic acid, whereas r-Cr0.19Rh0.06CeOz without ICy was inactive. FT-IR, Rh K-edge XAFS, XPS, and photoluminescence spectroscopy showed that the ICy carbene-coordinated Rh nanoclusters were the key active species. The coordination-induced trigger for catalytic activity on the ICy-bearing Rh nanoclusters could not be attributed to electronic donation from ICy to the Rh nanoclusters. DFT calculations suggested that ICy controlled the adsorption sites of the phenyl group on the Rh nanocluster to promote the C-C bond formation of the phenyl group and cyclohexenone.
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Affiliation(s)
- Satoru Ikemoto
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| | - Satoshi Muratsugu
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
| | - Takanori Koitaya
- Department of Materials Molecular Science, Institute for Molecular Science, Myodaiji-cho, Okazaki, Aichi 444-8585, Japan
| | - Yuta Tsuji
- Institute for Materials Chemistry and Engineering and International Research Center for Molecular Systems, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.,Faculty of Engineering Sciences, Kyushu University, 6-1 Kasuga-koen, Kasuga, Fukuoka 816-8580, Japan
| | - Mowpriya Das
- Westfälische Wilhelms-Universität Münster, Organisch-Chemisches Institut, Corrensstrasse 40, 48149 Münster, Germany
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering and International Research Center for Molecular Systems, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Frank Glorius
- Westfälische Wilhelms-Universität Münster, Organisch-Chemisches Institut, Corrensstrasse 40, 48149 Münster, Germany
| | - Mizuki Tada
- Department of Chemistry, Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan.,Research Center for Materials Science (RCMS), Integrated Research Consortium on Chemical Sciences (IRCCS), and Institute for Advanced Study, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8602, Japan
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18
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Ren Y, Wang M, Yang Q, Zhu J. Merging Chiral Diamine and Ni/SiO 2 for Heterogeneous Asymmetric 1,4-Addition Reactions. ACS Catal 2023. [DOI: 10.1021/acscatal.2c05889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Yiqi Ren
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian116023, China
- University of Chinese Academy of Sciences, Beijing100049, China
| | - Maodi Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian116023, China
- University of Chinese Academy of Sciences, Beijing100049, China
| | - Qihua Yang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua321004, China
| | - Junfa Zhu
- National Synchrotron Radiation Laboratory and Department of Chemical Physics, University of Science and Technology of China, Hefei230029, China
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19
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Chandra S, Hazari AS, Song Q, Hunger D, Neuman NI, van Slageren J, Klemm E, Sarkar B. Remarkable Enhancement of Catalytic Activity of Cu-Complexes in the Electrochemical Hydrogen Evolution Reaction by Using Triply Fused Porphyrin. CHEMSUSCHEM 2023; 16:e202201146. [PMID: 36173981 PMCID: PMC10107348 DOI: 10.1002/cssc.202201146] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 08/22/2022] [Indexed: 06/16/2023]
Abstract
A bimetallic triply fused copper(II) porphyrin complex (1) was prepared, comprising two monomeric porphyrin units linked through β-β, meso-meso, β'-β' triple covalent linkages and exhibiting remarkable catalytic activity for the electrochemical hydrogen evolution reaction in comparison to the analogous monomeric copper(II) porphyrin complex (2). Electrochemical investigations in the presence of a proton source (trifluoroacetic acid) confirmed that the catalytic activity of the fused metalloporphyrin occurred at a significantly lower overpotential (≈320 mV) compared to the non-fused monomer. Controlled potential electrolysis combined with kinetic analysis of catalysts 1 and 2 confirmed production of hydrogen, with 96 and 71 % faradaic efficiencies and turnover numbers of 102 and 18, respectively, with an observed rate constant of around 107 s-1 for the dicopper complex. The results thus firmly establish triply fused porphyrin ligands as outstanding candidates for generating highly stable and efficient molecular electrocatalysts in combination with earth-abundant 3d transition metals.
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Affiliation(s)
- Shubhadeep Chandra
- Lehrstuhl für Anorganische KoordinationschemieInstitut für Anorganische ChemieUniversität StuttgartPfaffenwaldring 5570569StuttgartGermany
| | - Arijit Singha Hazari
- Lehrstuhl für Anorganische KoordinationschemieInstitut für Anorganische ChemieUniversität StuttgartPfaffenwaldring 5570569StuttgartGermany
| | - Qian Song
- Institut für Technische ChemieUniversität StuttgartPfaffenwaldring 5570569StuttgartGermany
| | - David Hunger
- Institut für Physikalische ChemieUniversität StuttgartPfaffenwaldring 5570569StuttgartGermany
| | - Nicolás. I. Neuman
- Lehrstuhl für Anorganische KoordinationschemieInstitut für Anorganische ChemieUniversität StuttgartPfaffenwaldring 5570569StuttgartGermany
- Instituto de Desarrollo Tecnológico para la Industria Química CCTINTEC, UNL-CONICETPredio CONICET Santa Fe Dr. Alberto CassanoRuta Nacional N° 168, Km 0, Paraje El PozoS3000ZAASanta FeArgentina
| | - Joris van Slageren
- Institut für Physikalische ChemieUniversität StuttgartPfaffenwaldring 5570569StuttgartGermany
| | - Elias Klemm
- Institut für Technische ChemieUniversität StuttgartPfaffenwaldring 5570569StuttgartGermany
| | - Biprajit Sarkar
- Lehrstuhl für Anorganische KoordinationschemieInstitut für Anorganische ChemieUniversität StuttgartPfaffenwaldring 5570569StuttgartGermany
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20
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Lotsman KA, Rodygin KS, Skvortsova I, Kutskaya AM, Minyaev ME, Ananikov VP. Atom-economical synthesis of 1,2-bis(phosphine oxide)ethanes from calcium carbide with straightforward access to deuterium- and 13C-labeled bidentate phosphorus ligands and metal complexes. Org Chem Front 2023. [DOI: 10.1039/d2qo01652d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Straightforward access to bidentate phosphorus ligands and bis(phosphineoxide)ethanes is described based on atom-economic addition reaction. A practical approach was developed to incorporate 2H and 13C labels using easily available reagents.
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Affiliation(s)
- Kristina A. Lotsman
- Institute of Chemistry, Saint Petersburg State University, Universitetskiy pr. 26, Stary Petergof 198504, Russia
| | - Konstantin S. Rodygin
- Institute of Chemistry, Saint Petersburg State University, Universitetskiy pr. 26, Stary Petergof 198504, Russia
| | - Irina Skvortsova
- Institute of Chemistry, Saint Petersburg State University, Universitetskiy pr. 26, Stary Petergof 198504, Russia
| | - Anastasia M. Kutskaya
- Institute of Chemistry, Saint Petersburg State University, Universitetskiy pr. 26, Stary Petergof 198504, Russia
| | - Mikhail E. Minyaev
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky pr. 47, Moscow 119991, Russia
| | - Valentine P. Ananikov
- Institute of Chemistry, Saint Petersburg State University, Universitetskiy pr. 26, Stary Petergof 198504, Russia
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky pr. 47, Moscow 119991, Russia
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21
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Ortega-Lepe I, Sánchez P, Santos LL, Lara P, Rendón N, López-Serrano J, Salazar-Pereda V, Álvarez E, Paneque M, Suárez A. Catalytic Nitrous Oxide Reduction with H 2 Mediated by Pincer Ir Complexes. Inorg Chem 2022; 61:18590-18600. [PMID: 36346983 PMCID: PMC10441893 DOI: 10.1021/acs.inorgchem.2c02963] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Indexed: 11/09/2022]
Abstract
Reduction of nitrous oxide (N2O) with H2 to N2 and water is an attractive process for the decomposition of this greenhouse gas to environmentally benign species. Herein, a series of iridium complexes based on proton-responsive pincer ligands (1-4) are shown to catalyze the hydrogenation of N2O under mild conditions (2 bar H2/N2O (1:1), 30 °C). Among the tested catalysts, the Ir complex 4, based on a lutidine-derived CNP pincer ligand having nonequivalent phosphine and N-heterocyclic carbene (NHC) side donors, gave rise to the highest catalytic activity (turnover frequency (TOF) = 11.9 h-1 at 30 °C, and 16.4 h-1 at 55 °C). Insights into the reaction mechanism with 4 have been obtained through NMR spectroscopy. Thus, reaction of 4 with N2O in tetrahydrofuran-d8 (THF-d8) initially produces deprotonated (at the NHC arm) species 5NHC, which readily reacts with H2 to regenerate the trihydride complex 4. However, prolonged exposure of 4 to N2O for 6 h yields the dinitrogen Ir(I) complex 7P, having a deprotonated (at the P-arm) pincer ligand. Complex 7P is a poor catalytic precursor in the N2O hydrogenation, pointing out to the formation of 7P as a catalyst deactivation pathway. Moreover, when the reaction of 4 with N2O is carried out in wet THF-d8, formation of a new species, which has been assigned to the hydroxo species 8, is observed. Finally, taking into account the experimental results, density functional theory (DFT) calculations were performed to get information on the catalytic cycle steps. Calculations are in agreement with 4 as the TOF-determining intermediate (TDI) and the transfer of an apical hydrido ligand to the terminal nitrogen atom of N2O as the TOF-determining transition state (TDTS), with very similar reaction rates for the mechanisms involving either the NHC- or the P-CH2 pincer methylene linkers.
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Affiliation(s)
- Isabel Ortega-Lepe
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Práxedes Sánchez
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Laura L. Santos
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Patricia Lara
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Nuria Rendón
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Joaquín López-Serrano
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Verónica Salazar-Pereda
- Área
Académica de Químicas, Universidad
Autónoma del Estado de Hidalgo, 42184 Mineral de la Reforma, Hidalgo, Mexico
| | - Eleuterio Álvarez
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Margarita Paneque
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Andrés Suárez
- Instituto
de Investigaciones Químicas (IIQ), Departamento de Química
Inorgánica, and Centro de Innovación en Química
Avanzada (ORFEO-CINQA), CSIC-Universidad
de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
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22
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Ballico M, Alessi D, Jandl C, Lovison D, Baratta W. Terpyridine Diphosphine Ruthenium Complexes as Efficient Photocatalysts for the Transfer Hydrogenation of Carbonyl Compounds. Chemistry 2022; 28:e202201722. [PMID: 36001351 PMCID: PMC9828271 DOI: 10.1002/chem.202201722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Indexed: 01/12/2023]
Abstract
The cationic achiral and chiral terpyridine diphosphine ruthenium complexes [RuCl(PP)(tpy)]Cl (PP=dppp (1), (R,R)-Skewphos (2) and (S,S)-Skewphos (3)) are easily obtained in 85-88 % yield through a one-pot synthesis from [RuCl2 (PPh3 )3 ], the diphosphine and 2,2':6',2''-terpyridine (tpy) in 1-butanol. Treatment of 1-3 with NaPF6 in methanol at RT affords quantitatively the corresponding derivatives [RuCl(PP)(tpy)]PF6 (PP=dppp (1 a), (R,R)-Skewphos (2 a) and (S,S)-Skewphos (3 a)). Reaction of [RuCl2 (PPh3 )3 ] with (S,R)-Josiphos or (R)-BINAP in toluene, followed by treatment with tpy in 1-butanol and finally with NaPF6 in MeOH gives [RuCl(PP)(tpy)]PF6 (PP=(S,R)-Josiphos (4 a), (R)-BINAP (5 a)) isolated in 78 % and 86 % yield, respectively. The chiral derivatives have been isolated as single stereoisomers and 3 a, 4 a have been characterized by single crystal X-ray diffraction studies. The tpy complexes with NaOiPr display high photocatalytic activity in the transfer hydrogenation (TH) of carbonyl compounds using 2-propanol as the only hydrogen donor and visible light at 30 °C, at remarkably high S/C (up to 5000) and TOF values up to 264 h-1 . The chiral enantiomers 2, 2 a and 3, 3 a induce the asymmetric photocatalytic TH of acetophenone, affording (S)- and (R)-1-phenylethanol with 51 and 52 % ee, respectively, in a MeOH/2-propanol mixture.
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Affiliation(s)
- Maurizio Ballico
- Dipartimento di Scienze AgroAlimentariAmbientali e Animali (DI4A)Università di UdineVia Cotonificio 10833100UdineItaly
| | - Dario Alessi
- Dipartimento di Scienze AgroAlimentariAmbientali e Animali (DI4A)Università di UdineVia Cotonificio 10833100UdineItaly
| | - Christian Jandl
- Department of Chemistry & Catalysis Research CenterTUMLichtenbergstraße 485747Garching b. MünchenGermany
| | - Denise Lovison
- Dipartimento di Scienze AgroAlimentariAmbientali e Animali (DI4A)Università di UdineVia Cotonificio 10833100UdineItaly
| | - Walter Baratta
- Dipartimento di Scienze AgroAlimentariAmbientali e Animali (DI4A)Università di UdineVia Cotonificio 10833100UdineItaly
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23
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Citta RJ, Koteles BL, Delgado-Perez B, Chan BC, Kalman SE. Ruthenium(II) Complexes of an Imidazole Carboxamido Ligand for Base-Free Transfer Hydrogenation in Air. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Richard J. Citta
- Chemistry Program, School of Natural Sciences and Mathematics, Stockton University, Galloway, New Jersey 08205, United States
| | - Brandon L. Koteles
- Chemistry Program, School of Natural Sciences and Mathematics, Stockton University, Galloway, New Jersey 08205, United States
| | - Brenda Delgado-Perez
- Chemistry Program, School of Natural Sciences and Mathematics, Stockton University, Galloway, New Jersey 08205, United States
| | - Benny C. Chan
- Chemistry Department, The College of New Jersey, Ewing, New Jersey 08618, United States
| | - Steven E. Kalman
- Chemistry Program, School of Natural Sciences and Mathematics, Stockton University, Galloway, New Jersey 08205, United States
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24
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Hong SB, Liang LC. Aqueous Suzuki couplings mediated by a hydrophobic catalyst. RSC Adv 2022; 12:28862-28866. [PMID: 36320549 PMCID: PMC9552190 DOI: 10.1039/d2ra05230j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Accepted: 10/04/2022] [Indexed: 11/29/2022] Open
Abstract
The catalytic activity of [(Ph2P-o-C6H4)2N]PdCl in aerobic aqueous Suzuki couplings is described. Though hydrophobic, this molecular catalyst is competent in cross-coupling reactions of arylboronic acids with a variety of electronically activated, unactivated, and deactivated aryl iodides, bromides, and chlorides upon heating in aqueous solutions under aerobic conditions to give biphenyl derivatives without the necessity of amphiphiles even in the presence of an excess amount of mercury.
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Affiliation(s)
- Sheng-Bo Hong
- Department of Chemistry, National Sun Yat-sen UniversityKaohsiung 80424Taiwan
| | - Lan-Chang Liang
- Department of Chemistry, National Sun Yat-sen UniversityKaohsiung 80424Taiwan,Department of Medicinal and Applied Chemistry, Kaohsiung Medical UniversityKaohsiung 80708Taiwan,School of Pharmacy, Kaohsiung Medical UniversityKaohsiung 80708Taiwan
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25
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Nandi PG, Thombare P, Prathapa SJ, Kumar A. Pincer-Cobalt-Catalyzed Guerbet-Type β-Alkylation of Alcohols in Air under Microwave Conditions. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pran Gobinda Nandi
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Prasad Thombare
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | | | - Akshai Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
- Jyoti and Bhupat Mehta School of Health Sciences and Technology, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
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26
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Mourão H, Gomes CSB, Realista S, Royo B. Visible Light‐Induced Catalytic Hydrosilylation of Ketones Mediated by Manganese NHC Complexes. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Henrique Mourão
- ITQB NOVA, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Avenida da República Oeiras Portugal
| | - Clara S. B. Gomes
- LAQV‐REQUIMTE and UCIBIO‐Applied Molecular Biosciences Unit, Department of Chemistry, Campus de Caparica NOVA School of Science and Technology, NOVA University of Lisbon Caparica Portugal
- Associated Laboratory i4HB‐Institute for Health and Bioeconomy School of Science and Technology, NOVA University of Lisbon Caparica Portugal
| | - Sara Realista
- ITQB NOVA, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Avenida da República Oeiras Portugal
- Centro de Química Estrutural Institute of Molecular Sciences, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, Ed. C8 Lisboa Portugal
| | - Beatriz Royo
- ITQB NOVA, Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Avenida da República Oeiras Portugal
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27
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Tsui BTH, Sung MMH, Kinas J, Hahn FE, Morris RH. A Ruthenium Protic N-Heterocyclic Carbene Complex as a Precatalyst for the Efficient Transfer Hydrogenation of Aryl Ketones. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Brian T. H. Tsui
- Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
| | - Molly M. H. Sung
- Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
| | - Jenny Kinas
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 30, Münster D-48149, Germany
| | - F. Ekkehardt Hahn
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstraße 30, Münster D-48149, Germany
| | - Robert H. Morris
- Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
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28
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Pietrasiak E, Ha S, Jeon S, Jeong J, Lee J, Seo J, Lee E. Cobalt-Catalyzed Formation of Grignard Reagents via C-O or C-S Bond Activation. J Org Chem 2022; 87:8380-8389. [PMID: 35731897 DOI: 10.1021/acs.joc.2c00221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
C(aryl)-OMe bond functionalization catalyzed by cobalt(II) chloride in combination with a nacnac-type ligand and magnesium as a reductant is reported. Borylation and benzoylation of aryl methoxides are demonstrated, and C(aryl)-SMe bond borylation can be achieved under similar conditions. This is the first example of achieving these transformations using cobalt catalysis. Mechanistic studies suggest that a Grignard reagent is generated as an intermediate in a rare example of a magnesiation via a C-O bond activation reaction. Indeed, an organomagnesium species could be directly observed by electrospray ionization mass spectroscopic analysis. Kinetic experiments indicate that a heterogeneous cobalt catalyst performs the C-O bond activation.
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Affiliation(s)
- Ewa Pietrasiak
- Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, South Korea
| | - Seongmin Ha
- Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, South Korea
| | - Seungwon Jeon
- Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, South Korea
| | - Jongheon Jeong
- Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, South Korea
| | - Jiyeon Lee
- Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, South Korea
| | - Jongcheol Seo
- Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, South Korea
| | - Eunsung Lee
- Department of Chemistry, Pohang University of Science and Technology, Pohang 37673, South Korea
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29
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Recent Advances in Multicomponent Reactions Catalysed under Operationally Heterogeneous Conditions. Catalysts 2022. [DOI: 10.3390/catal12070725] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Multicomponent reactions (MCRs) have been gaining significance and attention over the past decade because of their ability to furnish complex products by using readily available and simple starting materials while simultaneously eliminating the need to separate and purify any intermediates. More so, most of these products have been found to exhibit diverse biological activities. Another paradigm shift which has occurred contemporarily is the switch to heterogeneous catalysis, which results in additional benefits such as the reduction of waste and an increase in the safety of the process. More importantly, it allows the user to recover and reuse the catalyst for multiple runs. In summary, both methodologies adhere to the principles of green chemistry, a philosophy which needs to become overarchingly enshrined. The plethora of reactions and catalysts which have been developed gives hope that chemists are slowly changing their ideology. As a result, this review attempts to discuss multicomponent reactions catalysed by operationally heterogeneous catalysts in the past 10 years. In this review, a further distinction is made between the MCRs which lead to the formation of heterocycles and those which do not.
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30
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Liu T, Li C, Bai J, Zhang P, Guo Y, Wang X. Markovnikov‐Selective Hydroboration of Aryl Alkenes Enabled by A Simple Nickel Salt. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202200244] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Tianfen Liu
- Green Catalysis Center College of Chemistry, Zhengzhou University, 100 Science Avenue, High‐Tech District Zhengzhou 450001 China
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Chuhan Li
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Jiahui Bai
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Panke Zhang
- Green Catalysis Center College of Chemistry, Zhengzhou University, 100 Science Avenue, High‐Tech District Zhengzhou 450001 China
| | - Yinlong Guo
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Xiaoming Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub‐lane Xiangshan Hangzhou 310024 China
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31
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Electrochemical and Light-driven CO2 reduction by Amine-Functionalized rhenium Catalysts: A comparison between primary and tertiary amine substitutions. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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32
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Denisova EA, Kostyukovich AY, Fakhrutdinov AN, Korabelnikova VA, Galushko AS, Ananikov VP. “Hidden” Nanoscale Catalysis in Alkyne Hydrogenation with Well-Defined Molecular Pd/NHC Complexes. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01749] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Ekaterina A. Denisova
- Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Leninsky Prospekt 47, Moscow 119991, Russia
| | - Alexander Yu. Kostyukovich
- Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Leninsky Prospekt 47, Moscow 119991, Russia
| | - Artem N. Fakhrutdinov
- Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Leninsky Prospekt 47, Moscow 119991, Russia
| | - Viktoria A. Korabelnikova
- Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Leninsky Prospekt 47, Moscow 119991, Russia
| | - Alexey S. Galushko
- Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Leninsky Prospekt 47, Moscow 119991, Russia
| | - Valentine P. Ananikov
- Zelinsky Institute of Organic Chemistry Russian Academy of Sciences, Leninsky Prospekt 47, Moscow 119991, Russia
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33
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Zhang Q, Lei H, Guo H, Wang Y, Gao Y, Zhang W, Cao R. Through-Space Electrostatic Effects of Positively Charged Substituents on the Hydrogen Evolution Reaction. CHEMSUSCHEM 2022; 15:e202200086. [PMID: 35156337 DOI: 10.1002/cssc.202200086] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 02/09/2022] [Indexed: 06/14/2023]
Abstract
Elucidating the effects of various structural components on energy-related small molecule activation is of fundamental and practical significance. Herein the inhibition effect of positively charged substituents on the hydrogen evolution reaction (HER) was reported. With the use of Cu porphyrins 1-5 containing different numbers and locations of positively charged substituents, it was demonstrated that their electrocatalytic HER activities significantly decreased when more cationic units were located close to the Cu ion: the icat /ip (icat is the catalytic peak current, ip is the one-electron reduction peak current) value decreased from 38 with zero cationic unit to 15 with four closely located cationic units. Inspired by this result, Cu porphyrin 6, with four meso-phenyl groups each bearing a negatively charged para-sulfonic substituent, was designed. With these anionic units, 6 outperformed the other Cu porphyrins for electrocatalytic HER under the same conditions.
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Affiliation(s)
- Qingxin Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Haitao Lei
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Hongbo Guo
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Yabo Wang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Yimei Gao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Wei Zhang
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
| | - Rui Cao
- Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710119, P. R. China
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34
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Chakraborty D, Mullangi D, Chandran C, Vaidhyanathan R. Nanopores of a Covalent Organic Framework: A Customizable Vessel for Organocatalysis. ACS OMEGA 2022; 7:15275-15295. [PMID: 35571831 PMCID: PMC9096826 DOI: 10.1021/acsomega.2c00235] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 04/05/2022] [Indexed: 05/14/2023]
Abstract
Covalent organic frameworks (COFs) as crystalline polymers possess ordered nanochannels. When their channels are adorned with catalytically active functional groups, their highly insoluble and fluffy powder texture makes them apt heterogeneous catalysts that can be dispersed in a range of solvents and heated to high temperatures (80-180 °C). This would mean very high catalyst density, facile active-site access, and easy separation leading to high isolated yields. Different approaches have been devised to anchor or disperse the catalytic sites into the nanospaces offered by the COF pores. Such engineered COFs have been investigated as catalysts for many organic transformation reactions. These range from Suzuki-Miyaura coupling, Heck coupling, Knoevenagel condensation, Michael addition, alkene epoxidation, CO2 utilization, and more complex biomimetic catalysis. Such catalysts employ COF as a "passive" support that merely docks catalytically active inorganic clusters, or in other cases, the COF itself participates as an "active" support by altering the electronics of the inorganic catalytic sites through the redox activity of its framework. Even more, catalytic organic pockets or metal complexes have been directly tethered to COF walls to make them behave like single-site organocatalysts. Here, we have listed most COF-based organic transformations by categorizing them as metal-free non-noble-metal@COF and noble-metal@COF. The initial part of this review highlights the advantages of COFs as a component of a heterogeneous catalyst, while the latter part discusses all of the current literature on this topic.
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Affiliation(s)
- Debanjan Chakraborty
- Department
of Chemistry, Indian Institute of Science
Education and Research, Pune 411008, India
- Centre
for Energy Science, Indian Institute of
Science Education and Research, Pune 411008, India
| | - Dinesh Mullangi
- Department
of Chemistry, Indian Institute of Science
Education and Research, Pune 411008, India
| | - Chandana Chandran
- Department
of Chemistry, Indian Institute of Science
Education and Research, Pune 411008, India
| | - Ramanathan Vaidhyanathan
- Department
of Chemistry, Indian Institute of Science
Education and Research, Pune 411008, India
- Centre
for Energy Science, Indian Institute of
Science Education and Research, Pune 411008, India
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35
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Farooqi ZH, Begum R, Naseem K, Wu W, Irfan A. Zero valent iron nanoparticles as sustainable nanocatalysts for reduction reactions. CATALYSIS REVIEWS 2022. [DOI: 10.1080/01614940.2020.1807797] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
| | - Robina Begum
- Institute of Chemistry, University of the Punjab, Lahore, Pakistan
| | - Khalida Naseem
- Faculty of Sciences, University of Central Punjab, Lahore, Pakistan
| | - Weitai Wu
- State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, The Key Laboratory for Chemical Biology of Fujian Province, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Ahmad Irfan
- Research Center for Advanced Materials Science (RCAMS), King Khalid University, Abha, Saudi Arabia
- Department of Chemistry, Faculty of Science, King Khalid University, Abha, Saudi Arabia
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36
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Sur A, Jernigan NB, Powers DC. Kinetic Probes of the Origin of Activity in MOF-Based C–H Oxidation Catalysis. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05415] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Aishanee Sur
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Nicholas B. Jernigan
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - David C. Powers
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
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37
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Serrano JL, Gaware S, Pérez JA, Pérez J, Lozano P, Kori S, Dandela R, Sanghvi YS, Kapdi AR. Quadrol-Pd(II) complexes: phosphine-free precatalysts for the room-temperature Suzuki-Miyaura synthesis of nucleoside analogues in aqueous media. Dalton Trans 2022; 51:2370-2384. [PMID: 35043803 DOI: 10.1039/d1dt03778a] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Commercially available Quadrol, N,N,N',N'-tetrakis(2-hydroxypropyl)ethylenediamine (THPEN), has been used for the first time as a N^N-donor neutral hydrophilic ligand in the synthesis and characterization of new water soluble palladium(II) complexes containing chloride, phthalimidate or saccharinate as co-ligands. [PdCl2(THPEN)] (1) [Pd(phthal)2(THPEN)] (2), [Pd(sacc)2(THPEN)] (3) and the analogous complex with the closely related N,N,N',N'-tetrakis(2-hydroxyethyl)ethylenediamine (THEEN) [Pd(sacc)2(THEEN)] (4) were efficiently prepared in a one-pot reaction from [PdCl2(CH3CN)2] or Pd(OAc)2. Structural characterization of 1 and 3 by single crystal X-ray diffraction produced the first structures reported to date of palladium complexes with Quadrol. The resultant palladium complexes are highly soluble in water and were found to be effective as phosphine-free catalysts for the synthesis of functionalized nucleoside analogues under room-temperature Suzuki-Miyaura cross-coupling conditions between 5-iodo-2'-deoxyuridine (& 5-iodo-2'-deoxycytidine) with different aryl boronic acids in neat water. This is the first report of the coupling process performed on nucleosides in water at room temperature.
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Affiliation(s)
- José Luis Serrano
- Departamento de Ingeniería Química y Ambiental. Área de Química Inorgánica, Universidad Politécnica de Cartagena member of European University of Technology, 30203 Cartagena, Spain.
| | - Sujeet Gaware
- Department of Chemistry, Institute of Chemical Technology-Indian Oil Odisha Campus, IIT Kharagpur Extension Centre, Mouza Samantpuri, Bhubaneswar 751013, Odisha, India
| | - Jose Antonio Pérez
- Departamento de Ingeniería Química y Ambiental. Área de Química Inorgánica, Universidad Politécnica de Cartagena member of European University of Technology, 30203 Cartagena, Spain.
| | - José Pérez
- Departamento de Ingeniería Química y Ambiental. Área de Química Inorgánica, Universidad Politécnica de Cartagena member of European University of Technology, 30203 Cartagena, Spain.
| | - Pedro Lozano
- Departamento de Bioquímica y Biología Molecular B e Inmunología, Facultad de Química, Regional Campus of International Excellence "Campus Mare Nostrum", Universidad de Murcia, 30071 Murcia, Spain
| | - Santosh Kori
- Department of Chemistry, Institute of Chemical Technology-Indian Oil Odisha Campus, IIT Kharagpur Extension Centre, Mouza Samantpuri, Bhubaneswar 751013, Odisha, India
- Department of Chemistry, Institute of Chemical Technology, Mumbai, Nathalal Road, Matunga, Mumbai-400019, India.
| | - Rambabu Dandela
- Department of Chemistry, Institute of Chemical Technology-Indian Oil Odisha Campus, IIT Kharagpur Extension Centre, Mouza Samantpuri, Bhubaneswar 751013, Odisha, India
| | - Yogesh S Sanghvi
- Rasayan Inc. 2802, Crystal Ridge Road, Encinitas, California, 92024-6615, USA
| | - Anant R Kapdi
- Department of Chemistry, Institute of Chemical Technology, Mumbai, Nathalal Road, Matunga, Mumbai-400019, India.
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38
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Yang S, Kim BM. Reduction of imines with a reusable bimetallic PdCo-Fe 3O 4 catalyst at room temperature under atmospheric pressure of H 2. RSC Adv 2022; 12:2436-2442. [PMID: 35425266 PMCID: PMC8979128 DOI: 10.1039/d1ra08552b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 12/27/2021] [Indexed: 02/01/2023] Open
Abstract
Bimetallic nanocatalysts have been used for the development of organic reactions, owing to the synergistic effect between the transition metals. A new procedure for synthesizing amines by the reduction of imines with H2 at atmospheric pressure and room temperature in the presence of PdCo–Fe3O4 nanoparticles is reported. The straightforward procedure, mild reaction conditions, high turnover number, and recyclability extend the scope of this reaction to practical applications. A catalytic procedure that has mild reaction conditions, high turnover number, and the recyclability of the catalyst is presented, whereby the synthesis of amines through the reduction of imines employing PdCo–Fe3O4 under atmospheric pressure of H2 is achieved.![]()
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Affiliation(s)
- Sabyuk Yang
- Department of Chemistry, College of Natural Sciences, Seoul National University Seoul 08826 South Korea
| | - Byeong Moon Kim
- Department of Chemistry, College of Natural Sciences, Seoul National University Seoul 08826 South Korea
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39
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Ghosh P, Schoch R, Bauer M, Jacobi von Wangelin A. Selective Benzylic CH‐Borylations by Tandem Cobalt Catalysis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202110821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Pradip Ghosh
- Dept. of Chemistry University of Hamburg Martin Luther King Pl 6 20146 Hamburg Germany
| | - Roland Schoch
- Dept. of Chemistry Center for Sustainable Systems Design, CSSD University of Paderborn 33098 Paderborn Germany
| | - Matthias Bauer
- Dept. of Chemistry Center for Sustainable Systems Design, CSSD University of Paderborn 33098 Paderborn Germany
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40
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Ghosh P, Schoch R, Bauer M, Jacobi von Wangelin A. Selective Benzylic CH-Borylations by Tandem Cobalt Catalysis. Angew Chem Int Ed Engl 2022; 61:e202110821. [PMID: 34596960 PMCID: PMC9299014 DOI: 10.1002/anie.202110821] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Indexed: 01/09/2023]
Abstract
Metal‐catalyzed C−H activations are environmentally and economically attractive synthetic strategies for the construction of functional molecules as they obviate the need for pre‐functionalized substrates and minimize waste generation. Great challenges reside in the control of selectivities, the utilization of unbiased hydrocarbons, and the operation of atom‐economical dehydrocoupling mechanisms. An especially mild borylation of benzylic CH bonds was developed with the ligand‐free pre‐catalyst Co[N(SiMe3)2]2 and the bench‐stable and inexpensive borylation reagent B2pin2 that produces H2 as the only by‐product. A full set of kinetic, spectroscopic, and preparative mechanistic studies are indicative of a tandem catalysis mechanism of CH‐borylation and dehydrocoupling via molecular CoI catalysts.
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Affiliation(s)
- Pradip Ghosh
- Dept. of Chemistry, University of Hamburg, Martin Luther King Pl 6, 20146, Hamburg, Germany
| | - Roland Schoch
- Dept. of Chemistry, Center for Sustainable Systems Design, CSSD, University of Paderborn, 33098, Paderborn, Germany
| | - Matthias Bauer
- Dept. of Chemistry, Center for Sustainable Systems Design, CSSD, University of Paderborn, 33098, Paderborn, Germany
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41
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Donthireddy SNR, Singh VK, Rit A. A heteroditopic NHC and phosphine ligand supported ruthenium( ii)-complex: an effective catalyst for the N-alkylation of amides using alcohols. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00544a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A heteroditopic Ru(ii)-bis-NHC complex in combination with dppe was developed as an effective catalyst system (0.2 mol% loading) for the N-alkylation of amides and selective mono-/di-alkylation of 4-aminobenzamide derivatives in excellent yields.
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Affiliation(s)
- S. N. R. Donthireddy
- Department of Chemistry, Indian Institute of Technology Madras, Chennai- 600036, India
| | - Vivek Kumar Singh
- Department of Chemistry, Indian Institute of Technology Madras, Chennai- 600036, India
| | - Arnab Rit
- Department of Chemistry, Indian Institute of Technology Madras, Chennai- 600036, India
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42
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Narjinari H, Tanwar N, Kathuria L, Jasra RV, Kumar A. Guerbet-type β-alkylation of secondary alcohols catalyzed by chromium chloride and its corresponding NNN pincer complex. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00759b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
β-Alkylation of alcohols has been efficiently accomplished using readily available 3d metal Cr under microwave conditions in air. Well-defined molecular Cr is involved with a KIE of 7.33 and insertion of α-alkylated ketone into Cr–H bond as the RDS.
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Affiliation(s)
- Himani Narjinari
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati – 781039, Assam, India
| | - Niharika Tanwar
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati – 781039, Assam, India
| | - Lakshay Kathuria
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati – 781039, Assam, India
| | - Raksh Vir Jasra
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati – 781039, Assam, India
- Reliance Industries limited, R&D Centre, Vadodara Manufacturing Division, Vadodara, 391 346, Gujarat, India
| | - Akshai Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati – 781039, Assam, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati – 781039, Assam, India
- Jyoti and Bhupat School of Health Sciences and Technology, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
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43
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Nandi PG, Kumar P, Kumar A. Ligand-free Guerbet-type reactions in air catalyzed by in situ formed complexes of base metal salt cobaltous chloride. Catal Sci Technol 2022. [DOI: 10.1039/d1cy02159a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Inexpensive, earth-abundant & environmentally benign CoCl2 efficiently catalyses the β-alkylation of alcohol in unprecedented yields (89%) & turnovers (8900). Mechanistic studies are indicative of in situ generated homogeneous molecular Co catalysts.
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Affiliation(s)
- Pran Gobinda Nandi
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Pradhuman Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Akshai Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
- Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
- School of Health Science & Technology, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
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44
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Monsigny L, Czarnocki S, Sienkiewicz M, Kopcha W, Frankfurter R, Vogt C, Solodenko W, Kajetanowicz A, Kirschning A, Grela K. Ruthenium Complex Bearing a Hydroxy Group Functionalised N‐Heterocyclic Carbene Ligand – A Universal Platform for Synthesis of Tagged and Immobilised Catalysts for Olefin Metathesis. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Louis Monsigny
- Biological and Chemical Research Centre, Faculty of Chemistry University of Warsaw Żwirki i Wigury Street 101 02-089 Warsaw Poland
| | - Stefan Czarnocki
- Biological and Chemical Research Centre, Faculty of Chemistry University of Warsaw Żwirki i Wigury Street 101 02-089 Warsaw Poland
| | - Michał Sienkiewicz
- Biological and Chemical Research Centre, Faculty of Chemistry University of Warsaw Żwirki i Wigury Street 101 02-089 Warsaw Poland
| | - William Kopcha
- Biological and Chemical Research Centre, Faculty of Chemistry University of Warsaw Żwirki i Wigury Street 101 02-089 Warsaw Poland
| | - René Frankfurter
- Institute of Inorganic Chemistry Leibniz University Hannover Callinstr. 9 D-30167 Hannover Germany
| | - Carla Vogt
- Institute of Analytical Chemistry Technical University Freiberg Leipziger Straße 29 09599 Freiberg Germany
| | - Wladimir Solodenko
- Institute of Organic Chemistry Leibniz University Hannover Schneiderberg 1b D-30167 Hannover Germany
| | - Anna Kajetanowicz
- Biological and Chemical Research Centre, Faculty of Chemistry University of Warsaw Żwirki i Wigury Street 101 02-089 Warsaw Poland
| | - Andreas Kirschning
- Institute of Organic Chemistry Leibniz University Hannover Schneiderberg 1b D-30167 Hannover Germany
| | - Karol Grela
- Biological and Chemical Research Centre, Faculty of Chemistry University of Warsaw Żwirki i Wigury Street 101 02-089 Warsaw Poland
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45
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Clauss R, Baweja S, Gelman D, Hey-Hawkins E. Heterobimetallic Pd/Mn and Pd/Co complexes as efficient and stereoselective catalysts for sequential Cu-free Sonogashira coupling-alkyne semi-hydrogenation reactions. Dalton Trans 2021; 51:1344-1356. [PMID: 34889939 DOI: 10.1039/d1dt03757a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A series of heterobimetallic PdII/MII complexes (MII = Mn, Co) were synthesised and tested as precatalysts for sequential Sonogashira coupling-alkyne semi-hydrogenation reactions to form Z-aryl alkenes. The carbometalated heterobimetallic PdII/CoII complex CoPdL3' demonstrated an apparent cooperative effect compared to the corresponding monometallic counterparts. This compound was identified as a potent single-molecule catalyst for the one-pot Cu-free Sonogashira coupling of aryl bromides with terminal alkynes followed by chemo- and stereoselective semi-hydrogenation of the alkyne intermediate using NH3·BH3 as a hydrogen source. Furthermore, different aromatic substrates have been tested to show the generality of the reaction for the synthesis of Z-alkenes, including biologically active combretastatin A-4. In addition, the homogeneous nature of the catalytically active species was demonstrated.
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Affiliation(s)
- Reike Clauss
- Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Leipzig University, Johannisallee 29, D-04103 Leipzig, Germany.
| | - Saral Baweja
- Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Leipzig University, Johannisallee 29, D-04103 Leipzig, Germany.
| | - Dmitri Gelman
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel
| | - Evamarie Hey-Hawkins
- Faculty of Chemistry and Mineralogy, Institute of Inorganic Chemistry, Leipzig University, Johannisallee 29, D-04103 Leipzig, Germany.
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46
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Chen K, Zhu H, Li Y, Peng Q, Guo Y, Wang X. Dinuclear Cobalt Complex-Catalyzed Stereodivergent Semireduction of Alkynes: Switchable Selectivities Controlled by H 2O. ACS Catal 2021. [DOI: 10.1021/acscatal.1c04141] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Ke Chen
- Frontiers Science Center for Transformative Molecules, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
- State Key Laboratory of Oganometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Hongdan Zhu
- State Key Laboratory of Elemento-Organic Chemistry and Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin 300071, China
| | - Yuling Li
- State Key Laboratory of Oganometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Qian Peng
- State Key Laboratory of Elemento-Organic Chemistry and Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University, 94 Weijin Road, Tianjin 300071, China
| | - Yinlong Guo
- State Key Laboratory of Oganometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Xiaoming Wang
- State Key Laboratory of Oganometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, 1 Sub-lane Xiangshan, Hangzhou 310024, China
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47
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Jayaprakash H. Mn(I) phosphine-amino-phosphinites: a highly modular class of pincer complexes for enantioselective transfer hydrogenation of aryl-alkyl ketones. Dalton Trans 2021; 50:14115-14119. [PMID: 34605841 PMCID: PMC8525186 DOI: 10.1039/d1dt02257a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2021] [Accepted: 09/01/2021] [Indexed: 12/22/2022]
Abstract
A series of Mn(I) catalysts with readily accessible and more π-accepting phosphine-amino-phosphinite (P'(O)N(H)P) pincer ligands have been explored for the asymmetric transfer hydrogenation of aryl-alkyl ketones which led to good to high enantioselectivities (up to 98%) compared to other reported Mn-based catalysts for such reactions. The easy tunability of the chiral backbone and the phosphine moieties makes P'(O)N(H)P an alternative ligand framework to the well-known PNP-type pincers.
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Affiliation(s)
- Harikrishnan Jayaprakash
- Department of Chemistry and Applied Biosciences, ETH Zürich, Wolfgang-Pauli-Str. 10, CH-8093 Zürich, Switzerland.
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48
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Alberico E, Leischner T, Junge H, Kammer A, Sang R, Seifert J, Baumann W, Spannenberg A, Junge K, Beller M. HCOOH disproportionation to MeOH promoted by molybdenum PNP complexes. Chem Sci 2021; 12:13101-13119. [PMID: 34745541 PMCID: PMC8513996 DOI: 10.1039/d1sc04181a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 08/31/2021] [Indexed: 12/15/2022] Open
Abstract
Molybdenum(0) complexes with aliphatic aminophosphine pincer ligands have been prepared which are competent for the disproportionation of formic acid, thus representing the first example so far reported of non-noble metal species to catalytically promote such transformation. In general, formic acid disproportionation allows for an alternative access to methyl formate and methanol from renewable resources. MeOH selectivity up to 30% with a TON of 57 could be achieved while operating at atmospheric pressure. Selectivity (37%) and catalyst performance (TON = 69) could be further enhanced when the reaction was performed under hydrogen pressure (60 bars). A plausible mechanism based on experimental evidence is proposed. Mo(0) complexes with aliphatic PNP-pincer ligands enable the first example of non-noble metal catalyzed formic acid disproportionation leading to methanol with a selectivity of up to 37% and a turnover number up to 69.![]()
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Affiliation(s)
- Elisabetta Alberico
- Leibniz-Institut für Katalyse e. V. Albert-Einstein Straße 29a 18059 Rostock Germany .,Istituto di Chimica Biomolecolare, Consiglio Nazionale delle Ricerche tr. La Crucca 3 07100 Sassari Italy
| | - Thomas Leischner
- Leibniz-Institut für Katalyse e. V. Albert-Einstein Straße 29a 18059 Rostock Germany
| | - Henrik Junge
- Leibniz-Institut für Katalyse e. V. Albert-Einstein Straße 29a 18059 Rostock Germany
| | - Anja Kammer
- Leibniz-Institut für Katalyse e. V. Albert-Einstein Straße 29a 18059 Rostock Germany
| | - Rui Sang
- Leibniz-Institut für Katalyse e. V. Albert-Einstein Straße 29a 18059 Rostock Germany
| | - Jenny Seifert
- Leibniz-Institut für Katalyse e. V. Albert-Einstein Straße 29a 18059 Rostock Germany
| | - Wolfgang Baumann
- Leibniz-Institut für Katalyse e. V. Albert-Einstein Straße 29a 18059 Rostock Germany
| | - Anke Spannenberg
- Leibniz-Institut für Katalyse e. V. Albert-Einstein Straße 29a 18059 Rostock Germany
| | - Kathrin Junge
- Leibniz-Institut für Katalyse e. V. Albert-Einstein Straße 29a 18059 Rostock Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e. V. Albert-Einstein Straße 29a 18059 Rostock Germany
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49
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Song S, Li C, Liu T, Zhang P, Wang X. H-BPin/KO tBu Promoted Activation of Cobalt Salt to a Heterotopic Catalyst for Highly Selective Cyclotrimerization of Alkynes. Org Lett 2021; 23:6925-6930. [PMID: 34428067 DOI: 10.1021/acs.orglett.1c02493] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A mixture of HBPin with KOtBu was found to activate cobalt salt to form a heterotopic cobalt species that is highly active for catalytic intermolecular trimerization of alkynes. This protocol affords 1,2,4-regioisomers in good yields with high regioselectivities under mild conditions. These salient features, together with the operational simplicity and high efficiency, as well as obviating the use of any costly and/or air sensitive ligands, renders the protocol promising for practical applications.
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Affiliation(s)
- Shuo Song
- Green Catalysis Center, College of Chemistry, Zhengzhou University, 100 Science Avenue, High-Tech District, Zhengzhou 450001 People's Republic of China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, People's Republic of China
| | - Chuhan Li
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, People's Republic of China
| | - Tianfen Liu
- Green Catalysis Center, College of Chemistry, Zhengzhou University, 100 Science Avenue, High-Tech District, Zhengzhou 450001 People's Republic of China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, People's Republic of China
| | - Panke Zhang
- Green Catalysis Center, College of Chemistry, Zhengzhou University, 100 Science Avenue, High-Tech District, Zhengzhou 450001 People's Republic of China.,Zhengzhou Sino-Crystal Diamond Co., Ltd., 20 Bitao Road, Zhengzhou 450001, People's Republic of China
| | - Xiaoming Wang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, Shanghai 200032, People's Republic of China.,School of Chemistry and Material Sciences, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, People's Republic of China
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50
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