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Kwon Y, Kong Y, Lee M, Lim E, Kwak J, Kim W. Regioselective Arylation of Amidoaryne Precursors via Ag-Mediated Intramolecular Oxy-Argentation. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2308829. [PMID: 38403474 PMCID: PMC11077674 DOI: 10.1002/advs.202308829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Revised: 01/28/2024] [Indexed: 02/27/2024]
Abstract
An unprecedented silver-mediated intramolecular oxy-argentation of 3-amidoaryne precursors that quickly generates a heteroarylsilver species is developed. AgF acts as both a stoichiometric fluoride source and a reagent for the formation of a benzoxazolylsilver intermediate via aryne generation. Pd-catalyzed coupling reactions of (hetero)aryl iodides with a silver species, generated in situ, allow for the synthesis of various C7-arylated benzoxazoles. As a result, an aryl group is selectively introduced into the meta-position of 3-amidobenzyne precursors. Mechanistic studies have indicated the presence of a benzoxazolylsilver intermediate and revealed that the reaction proceeds via an intramolecular oxy-argentation process, which is initiated by a direct fluoride attack on the silyl group.
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Affiliation(s)
- Yong‐Ju Kwon
- Department of Chemistry and NanoscienceEwha Womans UniversitySeoul03760Republic of Korea
| | - Ye‐Jin Kong
- Department of Chemistry and NanoscienceEwha Womans UniversitySeoul03760Republic of Korea
| | - Min‐Jung Lee
- Department of Chemistry and NanoscienceEwha Womans UniversitySeoul03760Republic of Korea
| | - Eun‐Hye Lim
- Department of Chemistry and NanoscienceEwha Womans UniversitySeoul03760Republic of Korea
| | - Jaesung Kwak
- Infectious Diseases Therapeutic Research CenterKorea Research Institute of Chemical Technology (KRICT)Daejeon34114Republic of Korea
- Division of Medicinal Chemistry and PharmacologyKRICT SchoolUniversity of Science and TechnologyDaejeon34114Republic of Korea
| | - Won‐Suk Kim
- Department of Chemistry and NanoscienceEwha Womans UniversitySeoul03760Republic of Korea
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2
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Kuwabara J, Kanbara T. Synthesis of Organic Optoelectronic Materials Using Direct C-H Functionalization. Chempluschem 2024; 89:e202300400. [PMID: 37823322 DOI: 10.1002/cplu.202300400] [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: 07/28/2023] [Revised: 10/11/2023] [Accepted: 10/12/2023] [Indexed: 10/13/2023]
Abstract
Small molecules and polymers with conjugated structures can be used as organic optoelectronic materials. These molecules have conventionally been synthesized by cross-coupling reactions; however, in recent years, direct functionalization of C-H bonds has been used to synthesize organic optoelectronic materials. Representative reactions include direct arylation reactions (C-H/C-X couplings, with X being halogen or pseudo-halogen) and cross-dehydrogenative coupling (C-H/C-H cross-coupling) reactions. Although these reactions are convenient for short-step synthesis, they require regioselectivity in the C-H bonds and suppression of undesired homo-coupling side reactions. This review introduces examples of the synthesis of organic optoelectronic materials using two types of direct C-H functionalization reactions. In addition, we summarize our recent activities in the development of direct C-H functionalization reactions using fluorobenzenes as substrates. This review covers the reaction mechanism and material properties of the resulting products.
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Affiliation(s)
- Junpei Kuwabara
- Tsukuba Research Center for Energy Materials Science (TREMS), Institute of Pure and Applied Sciences, University of Tsukuba, 1 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan
- Institute of Pure and Applied Sciences, University of Tsukuba, 1 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan
| | - Takaki Kanbara
- Institute of Pure and Applied Sciences, University of Tsukuba, 1 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8573, Japan
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3
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de Carvalho RL, Diogo EBT, Homölle SL, Dana S, da Silva Júnior EN, Ackermann L. The crucial role of silver(I)-salts as additives in C-H activation reactions: overall analysis of their versatility and applicability. Chem Soc Rev 2023; 52:6359-6378. [PMID: 37655711 PMCID: PMC10714919 DOI: 10.1039/d3cs00328k] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Indexed: 09/02/2023]
Abstract
Transition-metal catalyzed C-H activation reactions have been proven to be useful methodologies for the assembly of synthetically meaningful molecules. This approach bears intrinsic peculiarities that are important to be studied and comprehended in order to achieve its best performance. One example is the use of additives for the in situ generation of catalytically active species. This strategy varies according to the type of additive and the nature of the pre-catalyst that is being used. Thus, silver(I)-salts have proven to play an important role, due to the resulting high reactivity derived from the pre-catalysts of the main transition metals used so far. While being powerful and versatile, the use of silver-based additives can raise concerns, since superstoichiometric amounts of silver(I)-salts are typically required. Therefore, it is crucial to first understand the role of silver(I) salts as additives, in order to wisely overcome this barrier and shift towards silver-free systems.
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Affiliation(s)
- Renato L de Carvalho
- Institute of Exact Sciences, Department of Chemistry, Federal University of Minas Gerais-UFMG, 31270-901, Belo Horizonte, MG, Brazil.
| | - Emilay B T Diogo
- Institute of Exact Sciences, Department of Chemistry, Federal University of Minas Gerais-UFMG, 31270-901, Belo Horizonte, MG, Brazil.
| | - Simon L Homölle
- Institut für Organische und Biomolekulare Chemie and Wöhler Research Institute for Sustainable Chemistry, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany.
| | - Suman Dana
- Institut für Organische und Biomolekulare Chemie and Wöhler Research Institute for Sustainable Chemistry, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany.
| | - Eufrânio N da Silva Júnior
- Institute of Exact Sciences, Department of Chemistry, Federal University of Minas Gerais-UFMG, 31270-901, Belo Horizonte, MG, Brazil.
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie and Wöhler Research Institute for Sustainable Chemistry, Georg-August-Universität Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany.
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4
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Platt G, Aguiar PM, Athavan G, Bray JT, Scott NW, Fairlamb IJ, Perutz RN. Opening a Pandora's Flask on a Prototype Catalytic Direct Arylation Reaction of Pentafluorobenzene: The Ag 2CO 3/Pd(OAc) 2/PPh 3 System. Organometallics 2023; 42:2378-2394. [PMID: 37711884 PMCID: PMC10498494 DOI: 10.1021/acs.organomet.3c00309] [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: 07/12/2023] [Indexed: 09/16/2023]
Abstract
Direct C-H functionalization reactions have opened new avenues in catalysis, removing the need for prefunctionalization of at least one of the substrates. Although C-H functionalization catalyzed by palladium complexes in the presence of a base is generally considered to proceed by the CMD/AMLA-6 mechanism, recent research has shown that silver(I) salts, frequently used as bases, can function as C-H bond activators instead of (or in addition to) palladium(II). In this study, we examine the coupling of pentafluorobenzene 1 to 4-iodotoluene 2a (and its analogues) to form 4-(pentafluorophenyl)toluene 3a catalyzed by palladium(II) acetate with the commonplace PPh3 ligand, silver carbonate as base, and DMF as solvent. By studying the reaction of 1 with Ag2CO3/PPh3 and with isolated silver (triphenylphosphine) carbonate complexes, we show the formation of C-H activation products containing the Ag(C6F5)(PPh3)n unit. However, analysis is complicated by the lability of the Ag-PPh3 bond and the presence of multiple species in the solution. The speciation of palladium(II) is investigated by high-resolution-MAS NMR (chosen for its suitability for suspensions) with a substoichiometric catalyst, demonstrating the formation of an equilibrium mixture of Pd(Ar)(κ1-OAc)(PPh3)2 and [Pd(Ar)(μ-OAc)(PPh3)]2 as resting states (Ar = Ph, 4-tolyl). These two complexes react stoichiometrically with 1 to form coupling products. The catalytic reaction kinetics is investigated by in situ IR spectroscopy revealing a two-term rate law and dependence on [Pdtot/nPPh3]0.5 consistent with the dissociation of an off-cycle palladium dimer. The first term is independent of [1], whereas the second term is first order in [1]. The observed rates are very similar with Pd(PPh3)4, Pd(Ph)(κ1-OAc)(PPh3)2, and [Pd(Ph)(μ-OAc)(PPh3)]2 catalysts. The kinetic isotope effect varied significantly according to conditions. The multiple speciation of both AgI and PdII acts as a warning against specifying the catalytic cycles in detail. Moreover, the rapid dynamic interconversion of AgI species creates a level of complexity that has not been appreciated previously.
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Affiliation(s)
| | | | | | - Joshua T.W. Bray
- Department of Chemistry, University of York, York YO10 5DD, United
Kingdom
| | - Neil W.J. Scott
- Department of Chemistry, University of York, York YO10 5DD, United
Kingdom
| | - Ian J.S. Fairlamb
- Department of Chemistry, University of York, York YO10 5DD, United
Kingdom
| | - Robin N. Perutz
- Department of Chemistry, University of York, York YO10 5DD, United
Kingdom
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5
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Demonti L, Joven-Sancho D, Nebra N. Cross-Coupling Reactions Enabled by Well-Defined Ag(III) Compounds: Main Focus on Aromatic Fluorination and Trifluoromethylation. CHEM REC 2023; 23:e202300143. [PMID: 37338273 DOI: 10.1002/tcr.202300143] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 05/31/2023] [Indexed: 06/21/2023]
Abstract
AgIII compounds are considered strong oxidizers of difficult handling. Accordingly, the involvement of Ag catalysts in cross-coupling via 2e- redox sequences is frequently discarded. Nevertheless, organosilver(III) compounds have been authenticated using tetradentate macrocycles or perfluorinated groups as supporting ligands, and since 2014, first examples of cross-coupling enabled by AgI /AgIII redox cycles saw light. This review collects the most relevant contributions to this field, with main focus on aromatic fluorination/perfluoroalkylation and the identification of AgIII key intermediates. Pertinent comparison between the activity of AgIII RF compounds in aryl-F and aryl-CF3 couplings vs. the one shown by its CuIII RF and AuIII RF congeners is herein disclosed, thus providing a more profound picture on the scope of these transformations and the pathways commonly associated to C-RF bond formations enabled by coinage metals.
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Affiliation(s)
- Luca Demonti
- Laboratoire Hétérochimie Fondamentale et Appliquée (LHFA)., Université Paul Sabatier, CNRS., 118 Route de Narbonne, 31062, Toulouse, France)
| | - Daniel Joven-Sancho
- Laboratoire Hétérochimie Fondamentale et Appliquée (LHFA)., Université Paul Sabatier, CNRS., 118 Route de Narbonne, 31062, Toulouse, France)
| | - Noel Nebra
- Laboratoire Hétérochimie Fondamentale et Appliquée (LHFA)., Université Paul Sabatier, CNRS., 118 Route de Narbonne, 31062, Toulouse, France)
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6
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Baroliya PK, Dhaker M, Panja S, Al-Thabaiti SA, Albukhari SM, Alsulami QA, Dutta A, Maiti D. Transition Metal-Catalyzed C-H Functionalization Through Electrocatalysis. CHEMSUSCHEM 2023:e202202201. [PMID: 36881013 DOI: 10.1002/cssc.202202201] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 03/06/2023] [Indexed: 06/18/2023]
Abstract
Electrochemically promoted transition metal-catalyzed C-H functionalization has emerged as a promising area of research over the last few decades. However, development in this field is still at an early stage compared to traditional functionalization reactions using chemical-based oxidizing agents. Recent reports have shown increased attention on electrochemically promoted metal-catalyzed C-H functionalization. From the standpoint of sustainability, environmental friendliness, and cost effectiveness, electrochemically promoted oxidation of a metal catalyst offers a mild, efficient, and atom-economical alternative to traditional chemical oxidants. This Review discusses advances in the field of transition metal-electrocatalyzed C-H functionalization over the past decade and describes how the unique features of electricity enable metal-catalyzed C-H functionalization in an economic and sustainable way.
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Affiliation(s)
- Prabhat Kumar Baroliya
- Department of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai, 400076, India
- Department of Chemistry, Mohanlal Sukhadia University, Udaipur, 313001, India
| | - Mukesh Dhaker
- Department of Chemistry, Mohanlal Sukhadia University, Udaipur, 313001, India
| | - Subir Panja
- Department of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai, 400076, India
| | - Shaeel Ahmed Al-Thabaiti
- Department of Chemistry, Faculty of Sciences, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Soha M Albukhari
- Department of Chemistry, Faculty of Sciences, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Qana A Alsulami
- Department of Chemistry, Faculty of Sciences, King Abdulaziz University, Jeddah, 21589, Saudi Arabia
| | - Arnab Dutta
- Department of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai, 400076, India
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai, 400076, India
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7
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Yao J, Bai J, Kang X, Zhu M, Guo Y, Wang X. Non-directed C-H arylation of electron-deficient arenes by synergistic silver and Pd 3 cluster catalysis. NANOSCALE 2023; 15:3560-3565. [PMID: 36723135 DOI: 10.1039/d2nr05825a] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Transition-metal clusters have attracted great attention in catalysis due to their unique reactivity and electronic properties, especially for novel substrate binding and activation modes at the bridging coordination sites of metal clusters. Although palladium complexes have demonstrated outstanding catalytic performance in various transformations, the catalytic behaviors of polynuclear palladium clusters in many important synthetic methodologies remain much less explored so far. Herein, we disclose the use of an atomically defined tri-nuclear palladium (Pd3Cl) species as a catalyst precursor in Ag(I)-assisted direct C-H arylation with aryl iodides under mild conditions. This catalyst system leads to the formation of synthetically important biaryls in good yields with high site selectivities without the assistance of directing groups.
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Affiliation(s)
- Jian Yao
- Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, 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 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.
| | - Xi Kang
- Department of Chemistry and Center for Atomic Engineering of Advanced Materials, Anhui University, Hefei 230601, China
| | - Manzhou Zhu
- Department of Chemistry and Center for Atomic Engineering of Advanced Materials, Anhui University, Hefei 230601, 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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8
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Construction of Benzo-Fused Polycyclic Heteroaromatic Compounds through Palladium-Catalyzed Intramolecular C-H/C-H Biaryl Coupling. Catalysts 2022. [DOI: 10.3390/catal13010012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Dibenzo-fused five-membered heteroaromatic compounds, including dibenzofuran, carbazole, and dibenzothiophene, are fundamental structural units in various important polycyclic heteroaromatic compounds. The intramolecular C-H/C-H biaryl coupling of diaryl (thio)ethers and amines based on palladium(II) catalysis under oxidative conditions is known to be one of the most effective, step-economic methods for their construction. Representative examples for the construction of structurally intriguing π-extended polycyclic heteroaromatics through catalytic coupling reactions are briefly summarized in this mini-review.
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9
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Kantarod K, Soorukram D, Kuhakarn C, Surawatanawong P, Wattanathana W, Reutrakul V, Leowanawat P. Color-tunable emissive heptagon-embedded polycyclic aromatic dicarboximides. Chem Commun (Camb) 2022; 58:9468-9471. [PMID: 35894790 DOI: 10.1039/d2cc03461a] [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
Heptagon-embedded polycyclic aromatic dicarboximides were developed as new push-pull fluorescent dyes through palladium-catalysed [4+3] annulation followed by nucleophilic substitution. The introduction of a seven-membered ring in these push-pull systems can efficiently modulate the optical properties leading to an enhancement of the fluorescence quantum yields up to 0.93 with color tunable emission covering the visible-NIR spectrum.
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Affiliation(s)
- Kritchasorn Kantarod
- Center of Excellence for Innovation in Chemistry (PERCH-CIC) and Department of Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
| | - Darunee Soorukram
- Center of Excellence for Innovation in Chemistry (PERCH-CIC) and Department of Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
| | - Chutima Kuhakarn
- Center of Excellence for Innovation in Chemistry (PERCH-CIC) and Department of Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
| | - Panida Surawatanawong
- Center of Excellence for Innovation in Chemistry (PERCH-CIC) and Department of Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
| | - Worawat Wattanathana
- Department of Materials Engineering, Faculty of Engineering, Kasetsart University, Bangkok 10900, Thailand
| | - Vichai Reutrakul
- Center of Excellence for Innovation in Chemistry (PERCH-CIC) and Department of Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
| | - Pawaret Leowanawat
- Center of Excellence for Innovation in Chemistry (PERCH-CIC) and Department of Chemistry, Faculty of Science, Mahidol University, Bangkok 10400, Thailand.
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10
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Hoff LV, Chesnokov GA, Linden A, Gademann K. Mechanistic Studies and Data Science-Guided Exploration of Bromotetrazine Cross-Coupling. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01813] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Lukas V. Hoff
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Gleb A. Chesnokov
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Anthony Linden
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
| | - Karl Gademann
- Department of Chemistry, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland
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11
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Cai L, Zhang H, Wang K, Zhao H. Pd‐Catalyzed Decarboxylative Coupling Between Allyl Carbonates and Vinyl Benzoxazinanones. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Lu‐Yu Cai
- College of Life Science and Bio-engineering Beijing University of Technology Beijing 100124 People's Republic of China
| | - Heng Zhang
- College of Life Science and Bio-engineering Beijing University of Technology Beijing 100124 People's Republic of China
| | - Kuo Wang
- College of Life Science and Bio-engineering Beijing University of Technology Beijing 100124 People's Republic of China
| | - Hong‐Wu Zhao
- College of Life Science and Bio-engineering Beijing University of Technology Beijing 100124 People's Republic of China
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12
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Athavan G, Tanner TFN, Whitwood AC, Fairlamb IJS, Perutz RN. Direct Evidence for Competitive C–H Activation by a Well-Defined Silver XPhos Complex in Palladium-Catalyzed C–H Functionalization. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00063] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | - Robin N. Perutz
- Department of Chemistry, University of York, York YO10 5DD, U.K
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13
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Balakrishnan V, Murugesan V, Chindan B, Rasappan R. Attenuation of Ni(0) Decomposition: Mechanistic Insights into AgF-Assisted Nickel-Mediated Silylation. Inorg Chem 2022; 61:1438-1446. [PMID: 34995056 DOI: 10.1021/acs.inorgchem.1c03108] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In nickel-mediated Kumada cross-coupling reactions, low valent active nickel complexes are often generated in situ and the ligands usually govern the reactivity or stability of these complexes. However, the decomposition of active nickel complexes is inevitable if the subsequent reaction is sluggish. While we recently developed AgF-assisted nickel catalysis to cross-couple methyl ethers and silylmagnesium reagents, the intriguing catalytic role of AgF and the actual active nickel species remains elusive. Recently, both Ni(0) and Ni(I) intermediate complexes are identified as active species in Kumada cross-coupling reactions. Control experiments in combination with 31P nuclear magnetic resonance (NMR) suggest that AgF attenuates the decomposition of in situ generated Ni(0) species. The plausible Ni(0) and Ni(I) intermediate complexes were synthesized, and experimental findings are consistent with the actual catalytic cycle being Ni(0)/Ni(II) rather than Ni(I)/Ni(III).
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Affiliation(s)
- Venkadesh Balakrishnan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram 695551, Kerala, India
| | - Vetrivelan Murugesan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram 695551, Kerala, India
| | - Bincy Chindan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram 695551, Kerala, India
| | - Ramesh Rasappan
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Vithura, Thiruvananthapuram 695551, Kerala, India
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14
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Kori S, Bhujbal Y, Vadagaonkar K, Kapdi AR, Kommyreddy SP, Gharpure SJ. Room temperature HFIP/Ag-promoted palladium-catalyzed C-H functionalization of benzothiazole with iodoarenes. Chem Commun (Camb) 2021; 58:847-850. [PMID: 34931644 DOI: 10.1039/d1cc06063e] [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 versatile synthetic protocol involving the room temperature direct arylation of benzothiazole with a wide variety of iodoarenes under Ag-promoted Pd-catalyzed conditions in HFIP as the reaction solvent has been presented. A sequential HFIP-promoted selective iodination of arenes followed by Pd-catalyzed direct arylation of benzothiazole has also been disclosed. The utility of the developed protocol has been demonstrated by the synthesis of anti-tumor agents, PMX-610 and CJM-126 (precursor).
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Affiliation(s)
- Santosh Kori
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh Road, Matunga, Mumbai-400019, India. .,Institute of Chemical Technology-Indian Oil Odisha Campus, IIT Kharagpur Extension Centre, Mouza Samantpuri, Bhubaneswar-751013, Odisha, India
| | - Yuvraj Bhujbal
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh Road, Matunga, Mumbai-400019, India.
| | - Kamlesh Vadagaonkar
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh Road, Matunga, Mumbai-400019, India.
| | - Anant R Kapdi
- Department of Chemistry, Institute of Chemical Technology, Nathalal Parekh Road, Matunga, Mumbai-400019, India.
| | | | - Santosh J Gharpure
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai-400076, India
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15
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Ghosh S, Shilpa S, Athira C, Sunoj RB. Role of Additives in Transition Metal Catalyzed C–H Bond Activation Reactions: A Computational Perspective. Top Catal 2021. [DOI: 10.1007/s11244-021-01527-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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16
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Lalloo N, Malapit CA, Taimoory SM, Brigham CE, Sanford MS. Decarbonylative Fluoroalkylation at Palladium(II): From Fundamental Organometallic Studies to Catalysis. J Am Chem Soc 2021; 143:18617-18625. [PMID: 34709804 DOI: 10.1021/jacs.1c08551] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This Article describes the development of a decarbonylative Pd-catalyzed aryl-fluoroalkyl bond-forming reaction that couples fluoroalkylcarboxylic acid-derived electrophiles [RFC(O)X] with aryl organometallics (Ar-M'). This reaction was optimized by interrogating the individual steps of the catalytic cycle (oxidative addition, carbonyl de-insertion, transmetalation, and reductive elimination) to identify a compatible pair of coupling partners and an appropriate Pd catalyst. These stoichiometric organometallic studies revealed several critical elements for reaction design. First, uncatalyzed background reactions between RFC(O)X and Ar-M' can be avoided by using M' = boronate ester. Second, carbonyl de-insertion and Ar-RF reductive elimination are the two slowest steps of the catalytic cycle when RF = CF3. Both steps are dramatically accelerated upon changing to RF = CHF2. Computational studies reveal that a favorable F2C-H---X interaction contributes to accelerating carbonyl de-insertion in this system. Finally, transmetalation is slow with X = difluoroacetate but fast with X = F. Ultimately, these studies enabled the development of an (SPhos)Pd-catalyzed decarbonylative difluoromethylation of aryl neopentylglycol boronate esters with difluoroacetyl fluoride.
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Affiliation(s)
- Naish Lalloo
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Christian A Malapit
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - S Maryamdokht Taimoory
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Conor E Brigham
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Melanie S Sanford
- Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
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17
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Demonti L, Saffon-Merceron N, Mézailles N, Nebra N. Cross-Coupling through Ag(I)/Ag(III) Redox Manifold. Chemistry 2021; 27:15396-15405. [PMID: 34473859 DOI: 10.1002/chem.202102836] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Indexed: 01/07/2023]
Abstract
In ample variety of transformations, the presence of silver as an additive or co-catalyst is believed to be innocuous for the efficiency of the operating metal catalyst. Even though Ag additives are required often as coupling partners, oxidants or halide scavengers, its role as a catalytically competent species is widely neglected in cross-coupling reactions. Most likely, this is due to the erroneously assumed incapacity of Ag to undergo 2e- redox steps. Definite proof is herein provided for the required elementary steps to accomplish the oxidative trifluoromethylation of arenes through AgI /AgIII redox catalysis (i. e. CEL coupling), namely: i) easy AgI /AgIII 2e- oxidation mediated by air; ii) bpy/phen ligation to AgIII ; iii) boron-to-AgIII aryl transfer; and iv) ulterior reductive elimination of benzotrifluorides from an [aryl-AgIII -CF3 ] fragment. More precisely, an ultimate entry and full characterization of organosilver(III) compounds [K]+ [AgIII (CF3 )4 ]- (K-1), [(bpy)AgIII (CF3 )3 ] (2) and [(phen)AgIII (CF3 )3 ] (3), is described. The utility of 3 in cross-coupling has been showcased unambiguously, and a large variety of arylboron compounds was trifluoromethylated via [AgIII (aryl)(CF3 )3 ]- intermediates. This work breaks with old stereotypes and misconceptions regarding the inability of Ag to undergo cross-coupling by itself.
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Affiliation(s)
- Luca Demonti
- Laboratoire Hétérochimie Fondamentale et Appliquée (LHFA), Université Paul Sabatier, CNRS, 118 Route de Narbonne, 31062, Toulouse, France
| | - Nathalie Saffon-Merceron
- Institut de Chimie de Toulouse ICT-UAR2599, Université Paul Sabatier, CNRS, 31062, Toulouse Cedex, France
| | - Nicolas Mézailles
- Laboratoire Hétérochimie Fondamentale et Appliquée (LHFA), Université Paul Sabatier, CNRS, 118 Route de Narbonne, 31062, Toulouse, France
| | - Noel Nebra
- Laboratoire Hétérochimie Fondamentale et Appliquée (LHFA), Université Paul Sabatier, CNRS, 118 Route de Narbonne, 31062, Toulouse, France
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18
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Kimber RL, Parmeggiani F, Neill TS, Merroun ML, Goodlet G, Powell NA, Turner NJ, Lloyd JR. Biotechnological synthesis of Pd/Ag and Pd/Au nanoparticles for enhanced Suzuki-Miyaura cross-coupling activity. Microb Biotechnol 2021; 14:2435-2447. [PMID: 33720526 PMCID: PMC8601183 DOI: 10.1111/1751-7915.13762] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 01/19/2021] [Indexed: 11/27/2022] Open
Abstract
Bimetallic nanoparticle catalysts have attracted considerable attention due to their unique chemical and physical properties. The ability of metal-reducing bacteria to produce highly catalytically active monometallic nanoparticles is well known; however, the properties and catalytic activity of bimetallic nanoparticles synthesized with these organisms is not well understood. Here, we report the one-pot biosynthesis of Pd/Ag (bio-Pd/Ag) and Pd/Au (bio-Pd/Au) nanoparticles using the metal-reducing bacterium, Shewanella oneidensis, under mild conditions. Energy dispersive X-ray analyses performed using scanning transmission electron microscopy (STEM) revealed the presence of both metals (Pd/Ag or Pd/Au) in the biosynthesized nanoparticles. X-ray absorption near-edge spectroscopy (XANES) suggested a significant contribution from Pd(0) and Pd(II) in both bio-Pd/Ag and bio-Pd/Au, with Ag and Au existing predominately as their metallic forms. Extended X-ray absorption fine-structure spectroscopy (EXAFS) supported the presence of multiple Pd species in bio-Pd/Ag and bio-Pd/Au, as inferred from Pd-Pd, Pd-O and Pd-S shells. Both bio-Pd/Ag and bio-Pd/Au demonstrated greatly enhanced catalytic activity towards Suzuki-Miyaura cross-coupling compared to a monometallic Pd catalyst, with bio-Pd/Ag significantly outperforming the others. The catalysts were very versatile, tolerating a wide range of substituents. This work demonstrates a green synthesis method for novel bimetallic nanoparticles that display significantly enhanced catalytic activity compared to their monometallic counterparts.
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Affiliation(s)
- Richard L. Kimber
- Department of Earth and Environmental Sciences and Williamson Research Centre for Molecular Environmental ScienceUniversity of ManchesterManchesterUK
- Present address:
Department of Environmental GeosciencesUniversity of ViennaAlthanstraße 14 (UZA II)Vienna1090Austria
| | - Fabio Parmeggiani
- Department of ChemistryManchester Institute of Biotechnology (MIB)University of ManchesterManchesterUK
- Present address:
Department of Chemistry, Materials and Chemical Engineering ‘G. Natta’Politecnico di MilanoVia Mancinelli 7Milano20131Italy
| | - Thomas S. Neill
- Department of Earth and Environmental Sciences and Williamson Research Centre for Molecular Environmental ScienceUniversity of ManchesterManchesterUK
- Present address:
Institute for Nuclear Waste DisposalKarlsruhe Institute of TechnologyKarlsruhe76021Germany
| | - Mohamed L. Merroun
- Department of MicrobiologyFaculty of SciencesUniversity of GranadaCampus FuentenuevaGranada18071Spain
| | | | | | - Nicholas J. Turner
- Department of ChemistryManchester Institute of Biotechnology (MIB)University of ManchesterManchesterUK
| | - Jonathan R. Lloyd
- Department of Earth and Environmental Sciences and Williamson Research Centre for Molecular Environmental ScienceUniversity of ManchesterManchesterUK
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19
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Hasani M, Kalhor HR. Enzyme-Inspired Lysine-Modified Carbon Quantum Dots Performing Carbonylation Using Urea and a Cascade Reaction for Synthesizing 2-Benzoxazolinone. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01276] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Morteza Hasani
- Biochemistry Research Laboratory, Chemistry Department, Sharif University of Technology, P.O. Box 11155-3516, Tehran, Iran
| | - Hamid R. Kalhor
- Biochemistry Research Laboratory, Chemistry Department, Sharif University of Technology, P.O. Box 11155-3516, Tehran, Iran
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20
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Bhattacharya T, Dutta S, Maiti D. Deciphering the Role of Silver in Palladium-Catalyzed C–H Functionalizations. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02552] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Trisha Bhattacharya
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Subhabrata Dutta
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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21
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Correa A. Metal‐Catalyzed C(sp
2
)−H Functionalization Processes of Phenylalanine‐ and Tyrosine‐Containing Peptides. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100374] [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)
- Arkaitz Correa
- University of the Basque Country (UPV/EHU) Department of Organic Chemistry I Joxe Mari Korta R&D Center Avda. Tolosa 72 20018 Donostia-San Sebastián Spain
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22
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López‐Resano S, Martínez de Salinas S, Garcés‐Pineda FA, Moneo‐Corcuera A, Galán‐Mascarós JR, Maseras F, Pérez‐Temprano MH. Redefining the Mechanistic Scenario of Carbon−Sulfur Nucleophilic Coupling via High‐Valent Cp*Co
IV
Species. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sara López‐Resano
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
- Departament de Química Analítica i Química Orgànica Universitat Rovira i Virgili, C/ Marcelli Domingo s/n 43007 Tarragona Spain
| | - Sara Martínez de Salinas
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Felipe A. Garcés‐Pineda
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Andrea Moneo‐Corcuera
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - José Ramón Galán‐Mascarós
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
- ICREA Passeig Lluis Companys, 23 08010 Barcelona Spain
| | - Feliu Maseras
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Mónica H. Pérez‐Temprano
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
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23
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Deuker M, Yang Y, O’Hair RAJ, Koszinowski K. Tetraorganylargentate(III) Complexes: Key Intermediates in Silver-Mediated Cross-Coupling Reactions. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00118] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Marius Deuker
- Institut für Organische und Biomolekulare Chemie, Universität Göttingen, Tammannstraße 2, 37077 Göttingen, Germany
| | - Yang Yang
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, 30 Flemington Road, Parkville, Victoria 3010, Australia
| | - Richard A. J. O’Hair
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, 30 Flemington Road, Parkville, Victoria 3010, Australia
| | - Konrad Koszinowski
- Institut für Organische und Biomolekulare Chemie, Universität Göttingen, Tammannstraße 2, 37077 Göttingen, Germany
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24
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López-Resano S, Martínez de Salinas S, Garcés-Pineda FA, Moneo-Corcuera A, Galán-Mascarós JR, Maseras F, Pérez-Temprano MH. Redefining the Mechanistic Scenario of Carbon-Sulfur Nucleophilic Coupling via High-Valent Cp*Co IV Species. Angew Chem Int Ed Engl 2021; 60:11217-11221. [PMID: 33739577 DOI: 10.1002/anie.202101390] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 03/08/2021] [Indexed: 12/26/2022]
Abstract
The potential access to CoIV species for promoting transformations that are particularly challenging at CoIII still remains underexploited in the context of Cp*Co-catalyzed C-H functionalization reactions. Herein, we disclose a combined experimental and computational strategy for uncovering the participation of Cp*CoIV species in a Cp*Co-mediated C-S bond-reductive elimination. These studies support the intermediacy of high-valent Cp*Co species in C-H functionalization reactions, under oxidative conditions, when involving nucleophilic coupling partners.
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Affiliation(s)
- Sara López-Resano
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain.,Departament de Química Analítica i Química Orgànica, Universitat Rovira i, Virgili, C/ Marcelli Domingo s/n, 43007, Tarragona, Spain
| | - Sara Martínez de Salinas
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Felipe A Garcés-Pineda
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Andrea Moneo-Corcuera
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - José Ramón Galán-Mascarós
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain.,ICREA, Passeig Lluis Companys, 23, 08010, Barcelona, Spain
| | - Feliu Maseras
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
| | - Mónica H Pérez-Temprano
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
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25
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Bathie F, Stewart AWE, Canty AJ, O'Hair RAJ. Dissecting transmetalation reactions at the molecular level: C-B versus F-B bond activation in phenyltrifluoroborate silver complexes. Dalton Trans 2021; 50:1496-1506. [PMID: 33439189 DOI: 10.1039/d0dt03309j] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The gas-phase unimolecular reactions of the silver(i) complex [Ag(PhBF3)2]-, formed via electrospray ionisation mass spectrometry of solutions containing the phenyltrifluoroborate salt and AgNO3, are examined. Upon collision induced dissociation (CID) three major reaction channels were observed for [Ag(PhBF3)2]-: Ph- group transfer via a transmetalation reaction to yield [PhAg(PhBF3)]-; F- transfer to produce [FAg(PhBF3)]-; and release of PhBF3-. The anionic silver product complexes of these reactions, [LAg(PhBF3)]- (where L = Ph and F), were then mass-selected and subjected to a further stage of CID. [PhAg(PhBF3)]- undergoes a Ph- group transfer via transmetalation to yield [Ph2Ag]- with loss of BF3. [FAg(PhBF3)]- solely fragments via loss of BF4-, a reaction that involves Ph- group transfer from B to Ag in conjunction with F- transfer from Ag to B. Density functional theory (DFT) calculations on the various competing pathways reveal that: (i) the overall endothermicities govern the experimentally observed product ion abundances; (ii) the Ph- group and F- transfer reactions proceed via late transition states; and (iii) formation of BF4- from [FAg(PhBF3)]- is a multistep reaction in which Ph- group transfer from B to Ag proceeds first to produce a [FAgPh(BF3)]- complex in which the BF3 moiety is initially weakly bound to the ipso-carbon of the phenyl group and then migrates across the linear [FAgPh]- moiety from C to Ag to F yielding [PhAg(BF4)]-, which can then dissociate via loss of PhAg.
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Affiliation(s)
- Fiona Bathie
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, 30 Flemington Rd, Parkville, Victoria 3010, Australia. and School of Natural Sciences - Chemistry, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia.
| | - Adam W E Stewart
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, 30 Flemington Rd, Parkville, Victoria 3010, Australia. and School of Natural Sciences - Chemistry, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia.
| | - Allan J Canty
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, 30 Flemington Rd, Parkville, Victoria 3010, Australia. and School of Natural Sciences - Chemistry, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia.
| | - Richard A J O'Hair
- School of Chemistry and Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, 30 Flemington Rd, Parkville, Victoria 3010, Australia. and School of Natural Sciences - Chemistry, University of Tasmania, Private Bag 75, Hobart, Tasmania 7001, Australia.
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Abstract
In an effort to produce non-toxic and economically viable “green” protocols for waste water treatment, researchers are actively involved to develop versatile and effective silver nanoparticles (SNPs) as nano-catalyst from bio-based techniques. Since, p-nitrophenol (PNP) is one of the anthropogenic contaminants, considerable attention has been focused in catalytic degradability of PNP in wastewater treatment by curtailing serious effect on aquatic fauna. Ingestion of contaminants by aquatic organisms will not only affect the aquatic species but is also a potential threat to human health, especially if the toxic contaminants are involved in food chain. In this short report, we provided a comprehensive insight on few remarkable nanocatalysts especially based on SNPs and its biopolymer composites synthesized via ecofriendly “green” route. The beneficiality and catalytic performance of these silver nanocatalysts are concisely documented on standard model degradation reduction of PNP to p-aminophenol (PAP) in the presence of aqueous sodium borohydride. The catalytic degradation of PNP to PAP using SNPs follows pseudo first order kinetics involving six-electrons with lower activation energy. Furthermore, we provided a list of highly effective, recoverable, and economically viable SNPs, which demonstrated its potential as nanocatalysts by focusing its technical impact in the area of water remediation.
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27
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Che YY, Yue Y, Lin LZ, Pei B, Deng X, Feng C. Palladium-Catalyzed Electrophilic Functionalization of Pyridine Derivatives through Phosphonium Salts. Angew Chem Int Ed Engl 2020; 59:16414-16419. [PMID: 32533596 DOI: 10.1002/anie.202006724] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2020] [Revised: 05/30/2020] [Indexed: 12/11/2022]
Abstract
Herein, we report a highly efficient and practical method for pyridine-derived heterobiaryl synthesis through palladium-catalyzed electrophilic functionalization of easily available pyridine-derived quaternary phosphonium salts. The nice generality of this reaction was goes beyond arylation, enabling facile incorporation of diverse carbon-based fragments, including alkenyl, alkynyl, and also allyl fragments, onto the pyridine core. Notably, the silver salt additive is revealed to be of vital importance for the success of this transformation and its pivotal role as transmetallation mediator, which guarantees a smooth transfer of pyridyl group to palladium intermediate, is also described.
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Affiliation(s)
- Yuan-Yuan Che
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Yanni Yue
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Ling-Zhi Lin
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Bingbing Pei
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Xuezu Deng
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Chao Feng
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
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28
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Che Y, Yue Y, Lin L, Pei B, Deng X, Feng C. Palladium‐Catalyzed Electrophilic Functionalization of Pyridine Derivatives through Phosphonium Salts. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Yuan‐Yuan Che
- Technical Institute of Fluorochemistry (TIF)Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Yanni Yue
- Technical Institute of Fluorochemistry (TIF)Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Ling‐Zhi Lin
- Technical Institute of Fluorochemistry (TIF)Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Bingbing Pei
- Technical Institute of Fluorochemistry (TIF)Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Xuezu Deng
- Technical Institute of Fluorochemistry (TIF)Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University 30 South Puzhu Road Nanjing 211816 P. R. China
| | - Chao Feng
- Technical Institute of Fluorochemistry (TIF)Institute of Advanced SynthesisSchool of Chemistry and Molecular EngineeringNanjing Tech University 30 South Puzhu Road Nanjing 211816 P. R. China
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29
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Orr SA, Kelly JA, Boutland AJ, Blair VL. Structural Elucidation of Silver(I) Amides and Their Application as Catalysts in the Hydrosilylation and Hydroboration of Carbonyls. Chemistry 2020; 26:4947-4951. [DOI: 10.1002/chem.202000169] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 02/17/2020] [Indexed: 11/07/2022]
Affiliation(s)
- Samantha A. Orr
- School of ChemistryMonash University Wellington Road Clayton, Melbourne VIC 3800 Australia
| | - John A. Kelly
- School of ChemistryMonash University Wellington Road Clayton, Melbourne VIC 3800 Australia
| | - Aaron J. Boutland
- School of ChemistryMonash University Wellington Road Clayton, Melbourne VIC 3800 Australia
| | - Victoria L. Blair
- School of ChemistryMonash University Wellington Road Clayton, Melbourne VIC 3800 Australia
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30
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Yamada S, Flesch KN, Murakami K, Itami K. Rapid Access to Kinase Inhibitor Pharmacophores by Regioselective C–H Arylation of Thieno[2,3-d]pyrimidine. Org Lett 2020; 22:1547-1551. [DOI: 10.1021/acs.orglett.0c00143] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Shuya Yamada
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Kaylin Nicole Flesch
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Kei Murakami
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Kenichiro Itami
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
- JST, ERATO, Itami Molecular Nanocarbon Project, Nagoya University, Chikusa, Nagoya 464-8602, Japan
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31
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Oschmann M, Johansson Holm L, Pourghasemi-Lati M, Verho O. Synthesis of Elaborate Benzofuran-2-carboxamide Derivatives through a Combination of 8-Aminoquinoline Directed C-H Arylation and Transamidation Chemistry. Molecules 2020; 25:E361. [PMID: 31952313 PMCID: PMC7024369 DOI: 10.3390/molecules25020361] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 01/09/2020] [Accepted: 01/13/2020] [Indexed: 12/20/2022] Open
Abstract
Herein, we present a short and highly modular synthetic route that involves 8-aminoquinoline directed C-H arylation and transamidation chemistry, and which enables access to a wide range of elaborate benzofuran-2-carboxamides. For the directed C-H arylation reactions, Pd catalysis was used to install a wide range of aryl and heteroaryl substituents at the C3 position of the benzofuran scaffold in high efficiency. Directing group cleavage and further diversification of the C3-arylated benzofuran products were then achieved in a single synthetic operation through the utilization of a one-pot, two-step transamidation procedure, which proceeded via the intermediate N-acyl-Boc-carbamates. Given the high efficiency and modularity of this synthetic strategy, it constitutes a very attractive method for generating structurally diverse collections of benzofuran derivatives for small molecule screening campaigns.
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Affiliation(s)
| | | | | | - Oscar Verho
- Arrhenius Laboratory, Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden; (M.O.); (L.J.H.); (M.P.-L.)
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San Segundo M, Correa A. Pd-catalyzed site-selective C(sp 2)-H radical acylation of phenylalanine containing peptides with aldehydes. Chem Sci 2019; 10:8872-8879. [PMID: 31803461 PMCID: PMC6853082 DOI: 10.1039/c9sc03425k] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 08/06/2019] [Indexed: 12/20/2022] Open
Abstract
The site-selective functionalization of C-H bonds within a peptide framework remains a challenging task of prime synthetic importance. Herein, the first Pd-catalyzed δ-C(sp2)-H acylation of Phe containing peptides with aldehydes is described. This oxidative coupling is distinguished by its site-specificity, tolerance of sensitive functional groups, scalability, and enantiospecificity and exhibits entire chemoselectivity for Phe motifs over other amino acid units. The compatibility of this dehydrogenative acylation platform with a number of oligopeptides of high structural complexity illustrates its ample opportunities for the late-stage peptide modification and bioconjugation.
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Affiliation(s)
- Marcos San Segundo
- University of the Basque Country (UPV/EHU) , Department of Organic Chemistry I , Joxe Mari Korta R&D Center, Avda. Tolosa 72 , 20018 Donostia-San Sebastián , Spain .
| | - Arkaitz Correa
- University of the Basque Country (UPV/EHU) , Department of Organic Chemistry I , Joxe Mari Korta R&D Center, Avda. Tolosa 72 , 20018 Donostia-San Sebastián , Spain .
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Kalepu J, Pilarski LT. Weinreb Amides as Directing Groups for Transition Metal-Catalyzed C-H Functionalizations. Molecules 2019; 24:E830. [PMID: 30813564 PMCID: PMC6429370 DOI: 10.3390/molecules24050830] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 02/15/2019] [Accepted: 02/15/2019] [Indexed: 11/17/2022] Open
Abstract
Weinreb amides are a privileged, multi-functional group with well-established utility in classical synthesis. Recently, several studies have demonstrated the use of Weinreb amides as interesting substrates in transition metal-catalyzed C-H functionalization reactions. Herein, we review this part of the literature, including the metal catalysts, transformations explored so far and specific insights from mechanistic studies.
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Affiliation(s)
- Jagadeesh Kalepu
- Department of Chemistry-BMC, Uppsala University, BOX 576, 75-123 Uppsala, Sweden.
| | - Lukasz T Pilarski
- Department of Chemistry-BMC, Uppsala University, BOX 576, 75-123 Uppsala, Sweden.
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Gao M, Zou M, Wang J, Tan Q, Liu B, Xu B. Palladium-Catalyzed Multicomponent Reaction of Alkynes, Carboxylic Acids, and Isocyanides: A Direct Approach to Captodative Olefins. Org Lett 2019; 21:1593-1597. [PMID: 30802075 DOI: 10.1021/acs.orglett.9b00137] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A palladium-catalyzed multicomponent reaction of alkynes, carboxylic acids, and isocyanides has been developed with the assistance of silver salt under mild conditions. Highly functionalized captodative olefins are synthesized efficiently by this method, which can find many applications as versatile synthons in organic synthesis.
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Affiliation(s)
- Mingchun Gao
- Department of Chemistry, Innovative Drug Research Center, School of Materials Science and Engineering , Shanghai University , Shanghai 200444 , China
| | - Minfen Zou
- Department of Chemistry, Innovative Drug Research Center, School of Materials Science and Engineering , Shanghai University , Shanghai 200444 , China
| | - Jue Wang
- Department of Chemistry, Innovative Drug Research Center, School of Materials Science and Engineering , Shanghai University , Shanghai 200444 , China
| | - Qitao Tan
- Department of Chemistry, Innovative Drug Research Center, School of Materials Science and Engineering , Shanghai University , Shanghai 200444 , China
| | - Bingxin Liu
- Department of Chemistry, Innovative Drug Research Center, School of Materials Science and Engineering , Shanghai University , Shanghai 200444 , China
| | - Bin Xu
- Department of Chemistry, Innovative Drug Research Center, School of Materials Science and Engineering , Shanghai University , Shanghai 200444 , China.,State Key Laboratory of Organometallic Chemistry , Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , Shanghai 200032 , China
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