1
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Race JJ, Hudson LA, Albrecht M. Stable CAAC-Triazenes: A New Nitrogen Ligand System With Donor and Conformational Flexibility, and With Application in Olefin Activation Catalysis. Chemistry 2024; 30:e202400400. [PMID: 38687878 DOI: 10.1002/chem.202400400] [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: 01/30/2024] [Revised: 04/30/2024] [Accepted: 04/30/2024] [Indexed: 05/02/2024]
Abstract
N-heterocyclic imines such as pyridylidene amines impart high catalytic activity when coordinated to a transition metal, largely imposed by their electronic flexibility. Here, this donor flexibility has been applied for the first time to CAAC-based systems through the synthesis of CAAC-triazenes. These new ligands offer a larger π-conjugation that extends from the N-heterocyclic carbene through three nitrogens rather than just one, as observed in N-heterocyclic imines. We demonstrate the straightforward synthesis of three new CAAC-triazenes containing different substituents on the terminal triazene nitrogen. These compounds are remarkably stable up to 120 °C without loss of N2 as typically observed with similar triazenes. E-to-Z isomerization within the triazene is instigated by UV light and is partially reversible dependent on the triazene substituent. The quinoline-substituted CAAC-triazene 1-Q has been applied as an L,L'-type ligand in the synthesis of [PdCl2(1-Q)], [PdCl(Me)(1-Q)] and [Pd(Me)(H2O(1-Q)]+. E-to-Z ligand isomerization also occurs when coordinated to PdCl2, providing access to on-metal manipulation. The cationic complex [PdMe(H2O)(1-Q)]+ is a precatalyst for oligomerization of ethylene to form initially 2-butene and subsequently linear and branched C8-C12 products from butene activation. Moreover, isomerization of 1-hexene takes place efficiently with exceptionally low catalyst loading (10 ppm) and up to 74,000 turnover numbers.
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Affiliation(s)
- James J Race
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, 3012, Bern
| | - Luke A Hudson
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, 3012, Bern
| | - Martin Albrecht
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, 3012, Bern
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2
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Deng KZ, Sukowski V, Fernández-Ibáñez MÁ. Non-Directed C-H Arylation of Anisole Derivatives via Pd/S,O-Ligand Catalysis. Angew Chem Int Ed Engl 2024; 63:e202400689. [PMID: 38401127 DOI: 10.1002/anie.202400689] [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: 01/10/2024] [Revised: 02/15/2024] [Accepted: 02/16/2024] [Indexed: 02/26/2024]
Abstract
Non-directed C-H arylation is one of the most efficient methods to synthesize biaryl compounds without the need of the prefuctionalization of starting materials, or the installment and removal of directing groups on the substrate. A direct C-H arylation of simple arenes as limiting reactants remains a challenge. Here we disclose a non-directed C-H arylation of anisole derivatives as limiting reagents with aryl iodides under mild reaction conditions. The arylated products are obtained in synthetically useful yields and the arylation of bioactive molecules is also demonstrated. Key to the success of this methodology is the use of a one-step synthesized S,O-ligand.
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Affiliation(s)
- Ke-Zuan Deng
- van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | - Verena Sukowski
- van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
| | - M Ángeles Fernández-Ibáñez
- van't Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands
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3
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Liu DY, Han J, Liu K, Cheng Y, Tan H, Yang X, Li W, Xie J. Dinuclear Gold-Catalyzed para-Selective C-H Arylation of Undirected Arenes by Noncovalent Interactions. Angew Chem Int Ed Engl 2023; 62:e202313122. [PMID: 37707123 DOI: 10.1002/anie.202313122] [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: 09/05/2023] [Revised: 09/07/2023] [Accepted: 09/14/2023] [Indexed: 09/15/2023]
Abstract
The regioselectivity of C-H functionalization is commonly achieved by directing groups, electronic factors, or steric hindrance, which facilitate the identification of reaction sites. However, such strategies are less effective for reactants such as simple monofluoroarenes due to their relatively low reactivity and the modest steric demands of the fluorine atom. Herein, we present an undirected gold-catalyzed para-C-H arylation of a wide array of monofluoroarenes using air-stable aryl silanes and germanes at room temperature. A high para-regioselectivity (up to 98 : 2) can be realized by utilizing a dinuclear dppm(AuOTs)2 (dppm=bis(diphenylphosphino)methane) as the catalyst and hexafluorobenzene as the solvent. This provides a general and practical protocol for the concise construction of structurally diverse para-arylated monofluoroarenes through C-H activation manner. It features excellent functional group tolerance and a broad substrate scope (>80 examples). Besides, this strategy is also robust for other simple monosubstituted arenes and heteroarenes. Our mechanistic studies and theoretical calculations suggest that para-C-H selectivity arises from highly electrophilic and structurally flexible dinuclear Ar-Au(III)-Au(I) species, coupled with noncovalent interaction induced by hexafluorobenzene.
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Affiliation(s)
- Duan-Yang Liu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Jie Han
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Kai Liu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Yaohang Cheng
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Hairen Tan
- National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing, 210023, China
| | - Xiaoliang Yang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Weipeng Li
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
| | - Jin Xie
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China
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4
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Motiwala HF, Armaly AM, Cacioppo JG, Coombs TC, Koehn KRK, Norwood VM, Aubé J. HFIP in Organic Synthesis. Chem Rev 2022; 122:12544-12747. [PMID: 35848353 DOI: 10.1021/acs.chemrev.1c00749] [Citation(s) in RCA: 108] [Impact Index Per Article: 54.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
1,1,1,3,3,3-Hexafluoroisopropanol (HFIP) is a polar, strongly hydrogen bond-donating solvent that has found numerous uses in organic synthesis due to its ability to stabilize ionic species, transfer protons, and engage in a range of other intermolecular interactions. The use of this solvent has exponentially increased in the past decade and has become a solvent of choice in some areas, such as C-H functionalization chemistry. In this review, following a brief history of HFIP in organic synthesis and an overview of its physical properties, literature examples of organic reactions using HFIP as a solvent or an additive are presented, emphasizing the effect of solvent of each reaction.
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Affiliation(s)
- Hashim F Motiwala
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Ahlam M Armaly
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Jackson G Cacioppo
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Thomas C Coombs
- Department of Chemistry, University of North Carolina Wilmington, Wilmington, North Carolina 28403 United States
| | - Kimberly R K Koehn
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Verrill M Norwood
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
| | - Jeffrey Aubé
- Divison of Chemical Biology and Medicinal Chemistry, UNC Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599 United States
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5
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Maiti S, Li Y, Sasmal S, Guin S, Bhattacharya T, Lahiri GK, Paton RS, Maiti D. Expanding chemical space by para-C-H arylation of arenes. Nat Commun 2022; 13:3963. [PMID: 35803905 PMCID: PMC9270437 DOI: 10.1038/s41467-022-31506-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Accepted: 06/17/2022] [Indexed: 11/09/2022] Open
Abstract
Biaryl scaffolds are privileged templates used in the discovery and design of therapeutics with high affinity and specificity for a broad range of protein targets. Biaryls are found in the structures of therapeutics, including antibiotics, anti-inflammatory, analgesic, neurological and antihypertensive drugs. However, existing synthetic routes to biphenyls rely on traditional coupling approaches that require both arenes to be prefunctionalized with halides or pseudohalides with the desired regiochemistry. Therefore, the coupling of drug fragments may be challenging via conventional approaches. As an attractive alternative, directed C−H activation has the potential to be a versatile tool to form para-substituted biphenyl motifs selectively. However, existing C–H arylation protocols are not suitable for drug entities as they are hindered by catalyst deactivation by polar and delicate functionalities present alongside the instability of macrocyclic intermediates required for para-C−H activation. To address this challenge, we have developed a robust catalytic system that displays unique efficacy towards para-arylation of highly functionalized substrates such as drug entities, giving access to structurally diversified biaryl scaffolds. This diversification process provides access to an expanded chemical space for further exploration in drug discovery. Further, the applicability of the transformation is realized through the synthesis of drug molecules bearing a biphenyl fragment. Computational and experimental mechanistic studies further provide insight into the catalytic cycle operative in this versatile C−H arylation protocol. Biaryls are privileged structural motif used in the discovery and design of therapeutics with high affinity and specificity for a broad range of protein targets. Herein, the authors develop a robust strategy for para-C–H arylation of arenes with a range of (het)aryl iodides, including bioactive molecules.
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Affiliation(s)
- Sudip Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Yingzi Li
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523, USA
| | - Sheuli Sasmal
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Srimanta Guin
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Trisha Bhattacharya
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India
| | - Goutam Kumar Lahiri
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India.
| | - Robert S Paton
- Department of Chemistry, Colorado State University, Fort Collins, CO, 80523, USA.
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai, 400076, India. .,IDP in Climate Studies, Indian Institute of Technology Bombay, 400076, Mumbai, India.
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6
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Tao Y, Hu R, Xie Z, Lin P, Su W. Cobalt-Catalyzed Regioselective para-Amination of Azobenzenes via Nucleophilic Aromatic Substitution of Hydrogen. J Org Chem 2022; 87:4724-4731. [PMID: 35290054 DOI: 10.1021/acs.joc.2c00026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The metal-catalyzed nucleophilic aromatic substitution of hydrogen (SNArH) via coordination of the substituent on the aromatic ring to the metal catalyst, in terms of reactivity, substrate type, and reaction selectivity, complements the transition metal-catalyzed C-H functionalization that proceeds via C-H metalation but remains an elusive target. Described herein is the development of an unprecedented cobalt-catalyzed para-selective amination of azobenzenes, which is essentially a metal-promoted SNArH process as revealed by Hammett analysis, thus illustrating the concept that coordination of the substituent on the arene ring to the metal catalyst may result in electrophilic activation of the arene ring toward SNArH. This cobalt-catalyzed protocol allows the use of a variety of both aliphatic amines and anilines as aminating reagents, tolerates electronically diverse substituents of azobenzene, and furnishes the corresponding products in good yields with a regiospecific selectivity for para-amination.
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Affiliation(s)
- Yigao Tao
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China.,University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.,School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.,Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Rong Hu
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China.,University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.,School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China.,Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Zeyu Xie
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Ping Lin
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China
| | - Weiping Su
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China.,University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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7
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Grover J, Prakash G, Goswami N, Maiti D. Traditional and sustainable approaches for the construction of C–C bonds by harnessing C–H arylation. Nat Commun 2022; 13:1085. [PMID: 35228555 PMCID: PMC8885660 DOI: 10.1038/s41467-022-28707-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 01/27/2022] [Indexed: 12/18/2022] Open
Abstract
Biaryl scaffolds are found in natural products and drug molecules and exhibit a wide range of biological activities. In past decade, the transition metal-catalyzed C–H arylation reaction came out as an effective tool for the construction of biaryl motifs. However, traditional transition metal-catalyzed C–H arylation reactions have limitations like harsh reaction conditions, narrow substrate scope, use of additives etc. and therefore encouraged synthetic chemists to look for alternate greener approaches. This review aims to draw a general overview on C–H bond arylation reactions for the formation of C–C bonds with the aid of different methodologies, majorly highlighting on greener and sustainable approaches. Transition-metal-catalyzed C–H arylations are an effective tool for the construction of biaryl motifs in an efficient and selective manner. Here the authors provide an overview of the state-of-the-art of the field and perspectives on emerging directions toward increased sustainability.
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8
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Sinha SK, Guin S, Maiti S, Biswas JP, Porey S, Maiti D. Toolbox for Distal C-H Bond Functionalizations in Organic Molecules. Chem Rev 2021; 122:5682-5841. [PMID: 34662117 DOI: 10.1021/acs.chemrev.1c00220] [Citation(s) in RCA: 166] [Impact Index Per Article: 55.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Transition metal catalyzed C-H activation has developed a contemporary approach to the omnipresent area of retrosynthetic disconnection. Scientific researchers have been tempted to take the help of this methodology to plan their synthetic discourses. This paradigm shift has helped in the development of industrial units as well, making the synthesis of natural products and pharmaceutical drugs step-economical. In the vast zone of C-H bond activation, the functionalization of proximal C-H bonds has gained utmost popularity. Unlike the activation of proximal C-H bonds, the distal C-H functionalization is more strenuous and requires distinctly specialized techniques. In this review, we have compiled various methods adopted to functionalize distal C-H bonds, mechanistic insights within each of these procedures, and the scope of the methodology. With this review, we give a complete overview of the expeditious progress the distal C-H activation has made in the field of synthetic organic chemistry while also highlighting its pitfalls, thus leaving the field open for further synthetic modifications.
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Affiliation(s)
- Soumya Kumar Sinha
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Srimanta Guin
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Sudip Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Jyoti Prasad Biswas
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Sandip Porey
- 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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9
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Sukowski V, Jia W, Diest R, Borselen M, Fernández‐Ibáñez MÁ. S,O‐Ligand‐Promoted Pd‐Catalyzed C−H Olefination of Anisole Derivatives. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100737] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Verena Sukowski
- Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam The Netherlands
| | - Wen‐Liang Jia
- Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam The Netherlands
| | - Rianne Diest
- Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam The Netherlands
| | - Manuela Borselen
- Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam The Netherlands
| | - M. Ángeles Fernández‐Ibáñez
- Van't Hoff Institute for Molecular Sciences University of Amsterdam Science Park 904 1098 XH Amsterdam The Netherlands
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10
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Chen X, Fan S, Zhang M, Gao Y, Li S, Li G. Palladium-catalyzed remote para-C-H activation of arenes assisted by a recyclable pyridine-based template. Chem Sci 2021; 12:4126-4131. [PMID: 34163684 PMCID: PMC8179498 DOI: 10.1039/d0sc07042d] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2020] [Accepted: 02/01/2021] [Indexed: 11/21/2022] Open
Abstract
Direct para-selective C-H functionalization of arenes remains a daunting challenge and is still significantly restricted to a few scaffolds. Herein, we report an unprecedented pyridine-based para-directing template (DT) assisted, Pd-catalyzed para-C-H alkenylation of three classes of arenes, i.e. phenylpropanoic acids, 2-phenyl benzoic acids and benzyl alcohols, with a series of alkenes including perfluoroalkenes. Notably, the pyridine-based para-DT could be easily synthesized and readily recycled under mild conditions. These results may find application in rapid construction of para-substituted arenes and stimulate the exploration of novel methods for para-C-H functionalization of arenes.
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Affiliation(s)
- Xiaoxi Chen
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS) 155 West Yang-Qiao Road Fuzhou Fujian 350002 P. R. China
- Fujian College, University of Chinese Academy of Sciences Beijing 100049 China
| | - Shuai Fan
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS) 155 West Yang-Qiao Road Fuzhou Fujian 350002 P. R. China
| | - Meng Zhang
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS) 155 West Yang-Qiao Road Fuzhou Fujian 350002 P. R. China
| | - Yuzhen Gao
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS) 155 West Yang-Qiao Road Fuzhou Fujian 350002 P. R. China
| | - Shangda Li
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS) 155 West Yang-Qiao Road Fuzhou Fujian 350002 P. R. China
| | - Gang Li
- State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences (CAS) 155 West Yang-Qiao Road Fuzhou Fujian 350002 P. R. China
- Fujian College, University of Chinese Academy of Sciences Beijing 100049 China
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11
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Kim D, Choi G, Kim W, Kim D, Kang YK, Hong SH. The site-selectivity and mechanism of Pd-catalyzed C(sp 2)-H arylation of simple arenes. Chem Sci 2020; 12:363-373. [PMID: 34163602 PMCID: PMC8178950 DOI: 10.1039/d0sc05414c] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Control over site-selectivity is a critical challenge for practical application of catalytic C–H functionalization reactions in organic synthesis. Despite the seminal breakthrough of the Pd-catalyzed C(sp2)–H arylation of simple arenes via a concerted metalation–deprotonation (CMD) pathway in 2006, understanding the site-selectivity of the reaction still remains elusive. Here, we have comprehensively investigated the scope, site-selectivity, and mechanism of the Pd-catalyzed direct C–H arylation reaction of simple arenes. Counterintuitively, electron-rich arenes preferably undergo meta-arylation without the need for a specifically designed directing group, whereas electron-deficient arenes bearing fluoro or cyano groups exhibit high ortho-selectivity and electron-deficient arenes bearing bulky electron-withdrawing groups favor the meta-product. Comprehensive mechanistic investigations through a combination of kinetic measurements and stoichiometric experiments using arylpalladium complexes have revealed that the Pd-based catalytic system works via a cooperative bimetallic mechanism, not the originally proposed monometallic CMD mechanism, regardless of the presence of a strongly coordinating L-type ligand. Notably, the transmetalation step, which is influenced by a potassium cation, is suggested as the selectivity-determining step. The transmetalation step, not the C–H activation step, is suggested as the selectivity-determining step in Pd-catalyzed C–H arylation of simple arenes.![]()
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Affiliation(s)
- Daeun Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea .,Department of Chemistry, College of Natural Sciences, Seoul National University Seoul 08826 Republic of Korea
| | - Geunho Choi
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea .,Department of Chemistry, College of Natural Sciences, Seoul National University Seoul 08826 Republic of Korea
| | - Weonjeong Kim
- Department of Chemistry, College of Natural Sciences, Seoul National University Seoul 08826 Republic of Korea
| | - Dongwook Kim
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea
| | - Youn K Kang
- Department of Chemical Energy Engineering, Sangmyung University Seoul 03016 Korea
| | - Soon Hyeok Hong
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
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12
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Dutta U, Porey S, Pimparkar S, Mandal A, Grover J, Koodan A, Maiti D. para
‐Selective Arylation of Arenes: A Direct Route to Biaryls by Norbornene Relay Palladation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202005664] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Uttam Dutta
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400 076 India
| | - Sandip Porey
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400 076 India
| | - Sandeep Pimparkar
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400 076 India
| | - Astam Mandal
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400 076 India
| | - Jagrit Grover
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400 076 India
| | - Adithyaraj Koodan
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400 076 India
| | - Debabrata Maiti
- Department of Chemistry Indian Institute of Technology Bombay Powai Mumbai 400 076 India
- Tokyo Tech World Research Hub Initiative (WRHI) Laboratory for Chemistry and Life Science Tokyo Institute of Technology Tokyo 152-8550 Japan
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13
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Dutta U, Porey S, Pimparkar S, Mandal A, Grover J, Koodan A, Maiti D. para-Selective Arylation of Arenes: A Direct Route to Biaryls by Norbornene Relay Palladation. Angew Chem Int Ed Engl 2020; 59:20831-20836. [PMID: 32754958 DOI: 10.1002/anie.202005664] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 06/29/2020] [Indexed: 12/12/2022]
Abstract
Biaryl compounds are extremely important structural motifs in natural products, biologically active components and pharmaceuticals. Selective synthesis of biaryls by distinguishing the subtle reactivity difference of distal arene C-H bonds are significantly challenging. Herein, we describe para-selective C-H arylation, which is acheived by a unique combination of a meta-directing group and norbornene as a transient mediator. Upon direct meta-C-H palladation, one-bond relay palladation occurs in presence of norbornene and subsequently para-C-H arylation is achieved for sulfonates, phosphonates and phenols bearing 2,6-disubstitution patterns. The protocol is amenable to electron-deficient aryl iodides. Multisubstituted arenes and phenols are obtained by postsynthetic modification of the products. The protocol allows the synthesis of hexa-substituted benzene by sequential selective distal C-H functionalization.
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Affiliation(s)
- Uttam Dutta
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076, India
| | - Sandip Porey
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076, India
| | - Sandeep Pimparkar
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076, India
| | - Astam Mandal
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076, India
| | - Jagrit Grover
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076, India
| | - Adithyaraj Koodan
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076, India
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai, 400 076, India.,Tokyo Tech World Research Hub Initiative (WRHI) Laboratory for Chemistry and Life Science, Tokyo Institute of Technology, Tokyo, 152-8550, Japan
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14
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4-Amino-1,2,4-triazoles-3-thiones and 1,3,4-oxadiazoles-2-thiones·palladium(II) recoverable complexes as catalysts in the sustainable Suzuki-Miyaura cross-coupling reaction. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121353] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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15
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Chen X, Huang Y, Zhou J, Wang P. Pd‐Catalyzed Site‐Selective
Borylation of Simple Arenes
via
Thianthrenation
†. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000212] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Xiao‐Yue Chen
- Shanghai Key Laboratory of Green Chemistry and Chemical Process, East China Normal University 3663N Zhongshan Road Shanghai 200062 China
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences (CAS) 345 Lingling Road Shanghai 200032 China
| | - Yu‐Hao Huang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences (CAS) 345 Lingling Road Shanghai 200032 China
| | - Jian Zhou
- Shanghai Key Laboratory of Green Chemistry and Chemical Process, East China Normal University 3663N Zhongshan Road Shanghai 200062 China
| | - Peng Wang
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences (CAS) 345 Lingling Road Shanghai 200032 China
- CAS Key Laboratory of Energy Regulation Materials, Shanghai Institute of Organic Chemistry, CAS 345 Lingling Road Shanghai 200032 China
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16
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Liu L, Qiao JX, Yeung K, Ewing WR, Yu J. meta
‐Selective C−H Arylation of Fluoroarenes and Simple Arenes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202002865] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Luo‐Yan Liu
- Department of Chemistry The Scripps Research Institute (TSRI) 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Jennifer X. Qiao
- Discovery Chemistry Bristol-Myers Squibb PO Box 4000 Princeton NJ 08543 USA
| | - Kap‐Sun Yeung
- Discovery Chemistry Bristol-Myers Squibb Research and Development 100 Binney Street Cambridge MA 02142 USA
| | - William R. Ewing
- Discovery Chemistry Bristol-Myers Squibb PO Box 4000 Princeton NJ 08543 USA
| | - Jin‐Quan Yu
- Department of Chemistry The Scripps Research Institute (TSRI) 10550 North Torrey Pines Road La Jolla CA 92037 USA
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17
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Liu LY, Qiao JX, Yeung KS, Ewing WR, Yu JQ. meta-Selective C-H Arylation of Fluoroarenes and Simple Arenes. Angew Chem Int Ed Engl 2020; 59:13831-13835. [PMID: 32333462 PMCID: PMC7485903 DOI: 10.1002/anie.202002865] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 03/31/2020] [Indexed: 11/06/2022]
Abstract
Fluorine is known to promote ortho-C-H metalation. Based upon this reactivity, we employed an activated norbornene that traps the ortho-palladation intermediate and is then relayed to the meta position, leading to meta-selective C-H arylation of fluoroarenes. Deuterium experiment suggests that this meta-arylation is initiated by ortho C-H activation and the catalytic cycle is terminated by C-2 protonation. A dual-ligand system is crucial for the observed high reactivity and site selectivity. Applying this approach to simple benzene or other arenes also affords arylation products with good yield and site selectivity.
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Affiliation(s)
- Luo-Yan Liu
- Department of Chemistry, The Scripps Research Institute (TSRI), 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Jennifer X Qiao
- Discovery Chemistry, Bristol-Myers Squibb, PO Box 4000, Princeton, NJ, 08543, USA
| | - Kap-Sun Yeung
- Discovery Chemistry, Bristol-Myers Squibb Research and Development, 100 Binney Street, Cambridge, MA, 02142, USA
| | - William R Ewing
- Discovery Chemistry, Bristol-Myers Squibb, PO Box 4000, Princeton, NJ, 08543, USA
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute (TSRI), 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
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18
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Tu G, Wang D, Yuan C, Zhang J, Zhao Y. Palladium-Catalyzed Para-Selective Difluoromethylation of Arene Esters. J Org Chem 2020; 85:10740-10749. [DOI: 10.1021/acs.joc.0c01257] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Guangliang Tu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Dongjie Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Chunchen Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Jingyu Zhang
- College of Energy, Soochow Institute for Energy and Materials Innovations, Soochow University, Suzhou 215006, P. R. China
| | - Yingsheng Zhao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
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19
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Transient Directing Group‐Assisted C─H Bond Functionalization of Aliphatic Amines: Strategies for Efficiency and Site‐Selectivity. B KOREAN CHEM SOC 2020. [DOI: 10.1002/bkcs.12044] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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20
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Affiliation(s)
- Quan Zheng
- College of Pharmaceutical Science and Institute of Drug Development & Chemical BiologyZhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Chen‐Fu Liu
- College of Pharmaceutical ScienceGannan Medical University Ganzhou 341000 People's Republic of China
| | - Jie Chen
- College of Pharmaceutical Science and Institute of Drug Development & Chemical BiologyZhejiang University of Technology Hangzhou 310014 People's Republic of China
| | - Guo‐Wu Rao
- College of Pharmaceutical Science and Institute of Drug Development & Chemical BiologyZhejiang University of Technology Hangzhou 310014 People's Republic of China
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21
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Chen XY, Nie XX, Wu Y, Wang P. para-Selective arylation and alkenylation of monosubstituted arenes using thianthrene S-oxide as a transient mediator. Chem Commun (Camb) 2020; 56:5058-5061. [PMID: 32249278 DOI: 10.1039/d0cc00641f] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using thianthrene S-oxide (TTSO) as a transient mediator, para-arylation and alkenylation of mono-substituted arenes have been demonstrated via a para-selective thianthrenation/Pd-catalyzed thio-Suzuki-Miyaura coupling sequence under mild conditions. This reaction features a broad substrate scope, and functional group and heterocycle tolerance. The versatility of this approach was further demonstrated by late-stage functionalization of complex bioactive scaffolds, and direct synthesis of some pharmaceuticals, including Tetriprofen, Ibuprofen, Bifonazole, and LJ570.
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Affiliation(s)
- Xiao-Yue Chen
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, CAS 345 Lingling Road, Shanghai 200032, P. R. China.
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22
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de Azambuja F, Yang MH, Feoktistova T, Selvaraju M, Brueckner AC, Grove MA, Koley S, Cheong PHY, Altman RA. Connecting remote C-H bond functionalization and decarboxylative coupling using simple amines. Nat Chem 2020; 12:489-496. [PMID: 32152476 PMCID: PMC7192790 DOI: 10.1038/s41557-020-0428-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Accepted: 01/23/2020] [Indexed: 01/01/2023]
Abstract
Transition metal-catalyzed C–H functionalization and decarboxylative coupling are two of the most notable synthetic strategies developed in the last 30 years. Herein, we connect these two reaction pathways using bases and a simple Pd-based catalyst system to promote a para-selective C–H functionalization reaction from benzylic electrophiles. Experimental and computational mechanistic studies suggest a pathway involving an uncommon Pd-catalyzed dearomatization of the benzyl moiety followed by a base-enabled rearomatization through a formal 1,5-hydrogen migration. This reaction complements “C–H activation” strategies that convert inert C–H bonds into C–metal bonds prior to C–C bond formation. Instead, this reaction exploits an inverted sequence and promotes C–C bond formation prior to deprotonation. These studies provide an opportunity to develop general para-selective C–H functionalization reactions from benzylic electrophiles and show how new reactive modalities may be accessed with careful control of reaction conditions.
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Affiliation(s)
- Francisco de Azambuja
- Department of Medicinal Chemistry, The University of Kansas, Lawrence, KS, USA.,Department of Chemistry, KU Leuven, Leuven, Belgium
| | - Ming-Hsiu Yang
- Department of Medicinal Chemistry, The University of Kansas, Lawrence, KS, USA.,The Scripps Research Institute, La Jolla, CA, USA
| | | | | | | | - Markas A Grove
- Department of Chemistry, Oregon State University, Corvallis, OR, USA
| | - Suvajit Koley
- Department of Medicinal Chemistry, The University of Kansas, Lawrence, KS, USA
| | | | - Ryan A Altman
- Department of Medicinal Chemistry, The University of Kansas, Lawrence, KS, USA.
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23
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Yuan S, Chang J, Yu B. Construction of Biologically Important Biaryl Scaffolds through Direct C–H Bond Activation: Advances and Prospects. Top Curr Chem (Cham) 2020; 378:23. [DOI: 10.1007/s41061-020-0285-9] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Accepted: 01/21/2020] [Indexed: 11/30/2022]
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24
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Han Y, Li G, Liu L, Dai C, Shi DQ, Zhao Y. The protecting group enabled para-selective C–H benzylation of anilides via iron( ii) catalysis: a convenient approach for the synthesis of triarylmethanes. Org Chem Front 2020. [DOI: 10.1039/d0qo00402b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We report the para-selective C–H benzylation of phenyl carbamate with an iron(ii) catalyst.
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Affiliation(s)
- Yi Han
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical
- Engineering and Materials Science
- Soochow University
| | - Guobao Li
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical
- Engineering and Materials Science
- Soochow University
| | - Lingling Liu
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical
- Engineering and Materials Science
- Soochow University
| | - Chenyang Dai
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical
- Engineering and Materials Science
- Soochow University
| | - Da-Qing Shi
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical
- Engineering and Materials Science
- Soochow University
| | - Yingsheng Zhao
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical
- Engineering and Materials Science
- Soochow University
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25
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26
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Zhang M, Luo A, Shi Y, Su R, Yang Y, You J. F+ Reagent-Promoted Pd-Catalyzed C7–H Arylation of 1-Naphthamides. ACS Catal 2019. [DOI: 10.1021/acscatal.9b04352] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Min Zhang
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Anping Luo
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Yang Shi
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Rongchuan Su
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Yudong Yang
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
| | - Jingsong You
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P. R. China
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27
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Mihai MT, Williams BD, Phipps RJ. Para-Selective C-H Borylation of Common Arene Building Blocks Enabled by Ion-Pairing with a Bulky Countercation. J Am Chem Soc 2019; 141:15477-15482. [PMID: 31382747 PMCID: PMC6777044 DOI: 10.1021/jacs.9b07267] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The selective functionalization of C-H bonds at the arene para position is highly challenging using transition metal catalysis. Iridium-catalyzed borylation has emerged as a leading technique for arene functionalization, but there are only a handful of strategies for para-selective borylation, which operate on specific substrate classes and use bespoke ligands or catalysts. We describe a remarkably general protocol which results in para-selectivity on some of the most common arene building blocks (anilines, benzylamines, phenols, benzyl alcohols) and uses standard borylation ligands. Our strategy hinges upon the facile conversion of the substrates into sulfate or sulfamate salts, wherein the anionic arene component is paired with a tetrabutylammonium cation. We hypothesize that the bulk of this cation disfavors meta-C-H borylation, thereby promoting the challenging para-selective reaction.
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Affiliation(s)
- Madalina T Mihai
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , United Kingdom
| | - Benjamin D Williams
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , United Kingdom
| | - Robert J Phipps
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge CB2 1EW , United Kingdom
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28
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He Y, Huang L, Xie L, Liu P, Wei Q, Mao F, Zhang X, Huang J, Chen S, Huang C. Palladium-Catalyzed C-H Bond Functionalization Reactions Using Phosphate/Sulfonate Hypervalent Iodine Reagents. J Org Chem 2019; 84:10088-10101. [PMID: 31329431 DOI: 10.1021/acs.joc.9b01278] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A new and operationally simple approach for palladium-catalyzed C-H functionalization reactions utilizing an organophosphorus/sulfonate hypervalent iodine reagent as both an oxidant and the source of a functional group has been developed. Through this method, the oxidative phosphorylation-, sulfonation-, and hydroxylation of unactivated benzyl C(sp3)-H bonds, along with the hydroxylation and arylation of aryl C(sp2)-H bonds, are successfully realized under mild conditions and with excellent site-selectivity. The versatile C-OSO2R bond provides a platform for a wide array of subsequent diversification reactions.
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Affiliation(s)
| | | | | | - Peng Liu
- Guangzhou Institutes of Biomedicine and Health , Chinese Academy of Sciences , 190 Kaiyuan Avenue , Guangzhou 510530 , P. R. China
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29
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Kumaraswamy G, Gangadhar M, Ramesh V, Ankamma K, Sridhar B. Cationic Pd(IV)-Induced Highly Diastereoselective Arylative Cascade Cyclization of Allene-Tethered Cyclohexadienones Leading to Oxygenated Bicyclic Motifs. Org Lett 2019; 21:6300-6304. [PMID: 31361505 DOI: 10.1021/acs.orglett.9b02180] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
A cationic Pd(IV)-catalyzed arylative hydroxylation-Micheal addition of allenyl-tethered cyclohexadienones was developed. This relay reaction could afford highly diastereoselective various functionalized arylative 1,4-dioxane cis-bicyclic structural units with good to high yields. The striking features revealed from these studies is the necessity of Selectfluor and the oxidative hydroxylation originating from water initiated by F-Pd(IV) catalysis. A plausible mechanism was also proposed for this variant observation.
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Affiliation(s)
- Gullapalli Kumaraswamy
- Organic Synthesis and Process Chemistry Division , CSIR-Indian Institute of Chemical Technology , Hyderabad 500 007 , Telangana , India.,Academy of Scientific and Innovative Research (AcSIR) , New Delhi 110 025 , India.,Analytical Division , CSIR-Indian Institute of Chemical Technology , Hyderabad 500 007 , Telangana , India
| | - Maram Gangadhar
- Organic Synthesis and Process Chemistry Division , CSIR-Indian Institute of Chemical Technology , Hyderabad 500 007 , Telangana , India.,Academy of Scientific and Innovative Research (AcSIR) , New Delhi 110 025 , India
| | - Vankudoth Ramesh
- Organic Synthesis and Process Chemistry Division , CSIR-Indian Institute of Chemical Technology , Hyderabad 500 007 , Telangana , India.,Academy of Scientific and Innovative Research (AcSIR) , New Delhi 110 025 , India
| | - Kukkadapu Ankamma
- Organic Synthesis and Process Chemistry Division , CSIR-Indian Institute of Chemical Technology , Hyderabad 500 007 , Telangana , India
| | - Balasubramanian Sridhar
- Analytical Division , CSIR-Indian Institute of Chemical Technology , Hyderabad 500 007 , Telangana , India
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30
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Subhedar DD, Mishra AA, Bhanage BM. N
‐Methoxybenzamide: A Versatile Directing Group for Palladium‐, Rhodium‐ and Ruthenium‐Catalyzed C−H Bond Activations. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900405] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
| | - Ashish A. Mishra
- Department of ChemistryInstitute of Chemical Technology, Matunga Mumbai 400019 India
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31
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Dou Y, Kenry, Liu J, Jiang J, Zhu Q. Late‐Stage Direct
o
‐Alkenylation of Phenols by Pd
II
‐Catalyzed C−H Functionalization. Chemistry 2019; 25:6896-6901. [DOI: 10.1002/chem.201900530] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Indexed: 12/13/2022]
Affiliation(s)
- Yandong Dou
- College of Biotechnology and Bioengineering, & Collaborative Innovation Center of Yangtze, River Delta Region Green PharmaceuticalsZhejiang University of Technology Hangzhou 310014 China
| | - Kenry
- Department of Chemical and Biomolecular EngineeringNational University of Singapore 4 Engineering Drive 4 117585 Singapore Singapore
| | - Jiang Liu
- College of Biotechnology and Bioengineering, & Collaborative Innovation Center of Yangtze, River Delta Region Green PharmaceuticalsZhejiang University of Technology Hangzhou 310014 China
| | - Jianze Jiang
- College of Biotechnology and Bioengineering, & Collaborative Innovation Center of Yangtze, River Delta Region Green PharmaceuticalsZhejiang University of Technology Hangzhou 310014 China
| | - Qing Zhu
- College of Biotechnology and Bioengineering, & Collaborative Innovation Center of Yangtze, River Delta Region Green PharmaceuticalsZhejiang University of Technology Hangzhou 310014 China
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32
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Wang L, Wei YM, Zhao Y, Duan XF. Unified Protocol for Fe-Based Catalyzed Biaryl Cross-Couplings between Various Aryl Electrophiles and Aryl Grignard Reagents. J Org Chem 2019; 84:5176-5186. [DOI: 10.1021/acs.joc.9b00151] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Lei Wang
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Yi-Ming Wei
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Yan Zhao
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Xin-Fang Duan
- College of Chemistry, Beijing Normal University, Beijing 100875, China
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33
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Xu J, Chen J, Gao F, Xie S, Xu X, Jin Z, Yu JQ. Sequential Functionalization of meta-C-H and ipso-C-O Bonds of Phenols. J Am Chem Soc 2019; 141:1903-1907. [PMID: 30665300 DOI: 10.1021/jacs.8b13403] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The use of a template as a linchpin motif in directed remote C-H functionalization is a versatile yet relatively underexplored strategy. We have developed a template-directed approach to realizing one-pot sequential palladium-catalyzed meta-selective C-H olefination of phenols, and nickel-catalyzed ipso-C-O activation and arylation. Thus, this bifunctional template converts phenols to synthetically useful 1,3-disubstituted arenes.
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Affiliation(s)
- Jiancong Xu
- State Key Laboratory and Institute of Elemento-organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Jingjing Chen
- State Key Laboratory and Institute of Elemento-organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Feng Gao
- State Key Laboratory and Institute of Elemento-organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Shuguang Xie
- State Key Laboratory and Institute of Elemento-organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Xiaohua Xu
- State Key Laboratory and Institute of Elemento-organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300071 , China
| | - Zhong Jin
- State Key Laboratory and Institute of Elemento-organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300071 , China
| | - Jin-Quan Yu
- Department of Chemistry , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
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34
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Mao YJ, Wang BX, Wu QZ, Zhou K, Lou SJ, Xu DQ. Pd-Catalyzed para-selective C–H difluoromethylation of aromatic carbonyls. Chem Commun (Camb) 2019; 55:2019-2022. [DOI: 10.1039/c8cc09129c] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A novel Pd-catalyzed para-selective C–H bond difluoromethylation of diverse aromatic carbonyls was developed.
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Affiliation(s)
- Yang-Jie Mao
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology
- Hangzhou 310014
- P. R. China
| | - Bing-Xin Wang
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology
- Hangzhou 310014
- P. R. China
| | - Qiu-Zi Wu
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology
- Hangzhou 310014
- P. R. China
| | - Kun Zhou
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology
- Hangzhou 310014
- P. R. China
| | - Shao-Jie Lou
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology
- Hangzhou 310014
- P. R. China
| | - Dan-Qian Xu
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology
- Hangzhou 310014
- P. R. China
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35
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Li Z, Duan W. Palladium‐Catalyzed C−H Alkenylation of Arenes with Alkynes: Stereoselective Synthesis of Vinyl Chlorides via a 1,4‐Chlorine Migration. Angew Chem Int Ed Engl 2018; 57:16041-16045. [DOI: 10.1002/anie.201808866] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 09/25/2018] [Indexed: 12/27/2022]
Affiliation(s)
- Zhen Li
- College of Chemistry and Chemical EngineeringYangzhou University 180 Siwangting Road Yangzhou 225002 China
| | - Wei‐Liang Duan
- College of Chemistry and Chemical EngineeringYangzhou University 180 Siwangting Road Yangzhou 225002 China
- State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryChinese Academy of Sciences Shanghai 200032 China
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36
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Tang RJ, Milcent T, Crousse B. Bisulfate Salt-Catalyzed Friedel-Crafts Benzylation of Arenes with Benzylic Alcohols. J Org Chem 2018; 83:14001-14009. [PMID: 30378425 DOI: 10.1021/acs.joc.8b02361] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We report here a method of direct Friedel-Crafts benzylation of arenes with benzylic alcohols using cheap and readily available bisulfate salt as the catalyst in hexafluoroisopropanol. The catalytic system is powerful with a quite diverse group of functionalized arenes and benzylic alcohols. These mild conditions provide a straightforward synthesis of a variety of unsymmetrical diarylmethanes in high yield with good to high regioselectivity. An SN1 mechanism involving activation of the hydroxy group through a hydrogen bond is proposed.
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Affiliation(s)
- Ren-Jin Tang
- Faculty of Pharmacy, UMR 8076, BioCIS, Univ. Paris-Sud, CNRS , University Paris-Saclay , 92290 Châtenay-Malabry , France
| | - Thierry Milcent
- Faculty of Pharmacy, UMR 8076, BioCIS, Univ. Paris-Sud, CNRS , University Paris-Saclay , 92290 Châtenay-Malabry , France
| | - Benoit Crousse
- Faculty of Pharmacy, UMR 8076, BioCIS, Univ. Paris-Sud, CNRS , University Paris-Saclay , 92290 Châtenay-Malabry , France
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37
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A para
-C-H Functionalization of Aniline Derivatives via In situ Generated Bulky Hypervalent Iodinium Reagents. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801058] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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38
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Li Z, Duan W. Palladium‐Catalyzed C−H Alkenylation of Arenes with Alkynes: Stereoselective Synthesis of Vinyl Chlorides via a 1,4‐Chlorine Migration. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201808866] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zhen Li
- College of Chemistry and Chemical EngineeringYangzhou University 180 Siwangting Road Yangzhou 225002 China
| | - Wei‐Liang Duan
- College of Chemistry and Chemical EngineeringYangzhou University 180 Siwangting Road Yangzhou 225002 China
- State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic ChemistryChinese Academy of Sciences Shanghai 200032 China
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39
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Font M, Spencer ARA, Larrosa I. meta-C-H arylation of fluoroarenes via traceless directing group relay strategy. Chem Sci 2018; 9:7133-7137. [PMID: 30310635 PMCID: PMC6137440 DOI: 10.1039/c8sc02417k] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 07/25/2018] [Indexed: 11/21/2022] Open
Abstract
While several methods for the ortho selective arylation of fluoroarenes, meta-functionalisation has never been achieved. We report a new methodology, based on the traceless directing group relay concept, leading to the first meta-selective (hetero)arylation of fluoroarenes. In this strategy, CO2 is introduced as a transient directing group, to control a Pd-catalysed arylation meta to the fluoro functionality, prior to its release in a sequential, one-pot fashion. This method has shown compatibility with a number of functional groups and substitution patterns in both the fluoroarene core and aryl iodide coupling partners, and proceeds with complete meta-selectivity and mono vs. bis-arylation selectivity.
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Affiliation(s)
- Marc Font
- School of Chemistry , University of Manchester , Oxford Road , Manchester , M13 9PL , UK .
| | - Andrew R A Spencer
- School of Chemistry , University of Manchester , Oxford Road , Manchester , M13 9PL , UK .
| | - Igor Larrosa
- School of Chemistry , University of Manchester , Oxford Road , Manchester , M13 9PL , UK .
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40
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Mishra AA, Subhedar D, Bhanage BM. Nickel, Cobalt and Palladium Catalysed C−H Functionalization of Un‐Activated C(sp
3
)−H Bond. CHEM REC 2018; 19:1829-1857. [DOI: 10.1002/tcr.201800093] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Accepted: 09/02/2018] [Indexed: 11/09/2022]
Affiliation(s)
- Ashish A. Mishra
- Department of ChemistryInstitute of Chemical Technology, Matunga Nathalal Parekh Marg Mumbai Maharashtra
| | - Dnyaneshwar Subhedar
- Department of ChemistryInstitute of Chemical Technology, Matunga Nathalal Parekh Marg Mumbai Maharashtra
| | - Bhalchandra M. Bhanage
- Department of ChemistryInstitute of Chemical Technology, Matunga Nathalal Parekh Marg Mumbai Maharashtra
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41
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Jie K, Wang Y, Huang L, Guo S, Cai H. Convenient sulfonylation of imidazoles and triazoles using NFSI. J Sulphur Chem 2018. [DOI: 10.1080/17415993.2018.1480725] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Kun Jie
- College of Chemistry, Nanchang University, Nanchang, People’s Republic of China
| | - Yufeng Wang
- College of Chemistry, Nanchang University, Nanchang, People’s Republic of China
| | - Ling Huang
- College of Chemistry, Nanchang University, Nanchang, People’s Republic of China
| | - Shengmei Guo
- College of Chemistry, Nanchang University, Nanchang, People’s Republic of China
| | - Hu Cai
- College of Chemistry, Nanchang University, Nanchang, People’s Republic of China
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42
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Advances in Development of C–H Activation/Functionalization Using a Catalytic Directing Group. ChemistrySelect 2018. [DOI: 10.1002/slct.201801097] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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43
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Sharma R, Sharma U. Remote C-H bond activation/transformations: A continuous growing synthetic tool; Part II. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2018. [DOI: 10.1080/01614940.2018.1474538] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Ritika Sharma
- Natural Product Chemistry and Process Development Division, CSIR Institute of Himalayan Bioresource Technology, Palampur, India
- Academy of Scientific and Innovative Research, CSIR-Institute of Himalayan Bioresource Technology, Palampur, India
| | - Upendra Sharma
- Natural Product Chemistry and Process Development Division, CSIR Institute of Himalayan Bioresource Technology, Palampur, India
- Academy of Scientific and Innovative Research, CSIR-Institute of Himalayan Bioresource Technology, Palampur, India
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44
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Mahajani NS, Chisholm JD. Synthesis of 1,1'-Diarylethanes and Related Systems by Displacement of Trichloroacetimidates with Trimethylaluminum. J Org Chem 2018; 83:4131-4139. [PMID: 29478311 PMCID: PMC5889320 DOI: 10.1021/acs.joc.8b00027] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Benzylic trichloroacetimidates are readily displaced by trimethylaluminum under Lewis acid promoted conditions to provide the corresponding methyl substitution product. This method is a convenient way to access 1,1'-diarylethanes and related systems, which play a significant role in medicinal chemistry, with a number of systems owing their biological activity to this functionality. Most benzylic substrates undergo ready displacement, with electron deficient systems being the exception. The use of an enantiopure imidate showed significant racemization, implicating the formation of a cationic intermediate.
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Affiliation(s)
- Nivedita S. Mahajani
- Department of Chemistry, Syracuse University, 1-014 Center for Science and Technology, Syracuse, NY 13244
| | - John D. Chisholm
- Department of Chemistry, Syracuse University, 1-014 Center for Science and Technology, Syracuse, NY 13244
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45
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Yuan C, Zhu L, Chen C, Chen X, Yang Y, Lan Y, Zhao Y. Ruthenium(II)-enabled para-selective C-H difluoromethylation of anilides and their derivatives. Nat Commun 2018; 9:1189. [PMID: 29567953 PMCID: PMC5864885 DOI: 10.1038/s41467-018-03341-6] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 01/25/2018] [Indexed: 11/14/2022] Open
Abstract
Transition-metal-catalyzed direct site-selective functionalization of arene C–H bonds has emerged as an innovative approach for building the core structure of pharmaceutical agents and other versatile complex compounds. However, para-selective C–H functionalization has seldom been explored, only a few examples, such as steric-hindered arenes, electron-rich arenes, and substrates with a directing group, have been reported to date. Here we describe the development of a ruthenium-enabled para-selective C–H difluoromethylation of anilides, indolines, and tetrahydroquinolines. This reaction tolerates various substituted arenes, affording para-difluoromethylation products in moderate to good yields. Results of a preliminary study of the mechanism indicate that chelation-assisted cycloruthenation might play a role in the selective activation of para-CAr–H bonds. Furthermore, this method provides a direct approach for the synthesis of fluorinated drug derivatives, which has important application for drug discovery and development. Selective para-functionalization of substituted arenes is a formidable challenge in homogeneous catalysis. Here, the authors achieved the para-selective C-H difluoromethylation of anilides, indolines and tetrahydroquinolines with a ruthenium catalyst in good yields and apply it to the synthesis of bioactive compounds.
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Affiliation(s)
- Chunchen Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry, Chemical Engineering, and Materials Science Soochow University, Suzhou, 215123, China
| | - Lei Zhu
- School of Chemistry and Chemical Engineering Chongqing University, Chongqing, 40030, China
| | - Changpeng Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry, Chemical Engineering, and Materials Science Soochow University, Suzhou, 215123, China
| | - Xiaolan Chen
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry, Chemical Engineering, and Materials Science Soochow University, Suzhou, 215123, China
| | - Yong Yang
- Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Science, Qingdao, 266000, China
| | - Yu Lan
- School of Chemistry and Chemical Engineering Chongqing University, Chongqing, 40030, China.
| | - Yingsheng Zhao
- Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry, Chemical Engineering, and Materials Science Soochow University, Suzhou, 215123, China.
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46
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Yuan C, Zhu L, Zeng R, Lan Y, Zhao Y. Ruthenium(II)-Catalyzed C−H Difluoromethylation of Ketoximes: Tuning the Regioselectivity from the meta
to the para
Position. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201711221] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Chunchen Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province; College of Chemistry, Chemical Engineering, and Materials Science; Soochow University; Suzhou 215123 P.R. China
| | - Lei Zhu
- School of Chemistry and Chemical Engineering; Chongqing University; Chongqing 40030 P.R. China
| | - Runsheng Zeng
- Key Laboratory of Organic Synthesis of Jiangsu Province; College of Chemistry, Chemical Engineering, and Materials Science; Soochow University; Suzhou 215123 P.R. China
| | - Yu Lan
- School of Chemistry and Chemical Engineering; Chongqing University; Chongqing 40030 P.R. China
| | - Yingsheng Zhao
- Key Laboratory of Organic Synthesis of Jiangsu Province; College of Chemistry, Chemical Engineering, and Materials Science; Soochow University; Suzhou 215123 P.R. China
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47
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Yuan C, Zhu L, Zeng R, Lan Y, Zhao Y. Ruthenium(II)-Catalyzed C-H Difluoromethylation of Ketoximes: Tuning the Regioselectivity from the meta to the para Position. Angew Chem Int Ed Engl 2018; 57:1277-1281. [PMID: 29215181 DOI: 10.1002/anie.201711221] [Citation(s) in RCA: 88] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Indexed: 11/06/2022]
Abstract
A highly para-selective CAr -H difluoromethylation of ketoxime ethers under ruthenium catalysis has been developed. A wide variety of ketoxime ethers are compatible with the reaction, which leads to the corresponding para-difluoromethylated products in moderate to good yield. A mechanistic study clearly showed that chelation-assisted cycloruthenation is the key factor in the para selectivity of the difluoromethylation of ketoxime ethers. Density functional theory was used to gain a theoretical understanding of the para selectivity.
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Affiliation(s)
- Chunchen Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering, and Materials Science, Soochow University, Suzhou, 215123, P.R. China
| | - Lei Zhu
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 40030, P.R. China
| | - Runsheng Zeng
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering, and Materials Science, Soochow University, Suzhou, 215123, P.R. China
| | - Yu Lan
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, 40030, P.R. China
| | - Yingsheng Zhao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering, and Materials Science, Soochow University, Suzhou, 215123, P.R. China
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48
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Naksomboon K, Álvarez-Casao Y, Uiterweerd M, Westerveld N, Maciá B, Fernández-Ibáñez MÁ. S,O-ligand-promoted palladium-catalyzed C–H olefination of arenes with allylic substrates. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2017.12.047] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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49
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Leitch JA, McMullin CL, Paterson AJ, Mahon MF, Bhonoah Y, Frost CG. Ruthenium-Catalyzed para
-Selective C−H Alkylation of Aniline Derivatives. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201708961] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jamie A. Leitch
- Department of Chemistry; University of Bath; Claverton Down Somerset BA2 7AY UK
| | - Claire L. McMullin
- Department of Chemistry; University of Bath; Claverton Down Somerset BA2 7AY UK
| | - Andrew J. Paterson
- Department of Chemistry; University of Bath; Claverton Down Somerset BA2 7AY UK
| | - Mary F. Mahon
- Department of Chemistry; University of Bath; Claverton Down Somerset BA2 7AY UK
| | - Yunas Bhonoah
- Syngenta; Jealott's Hill International Research Centre; Bracknell Berkshire RG42 6EY UK
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50
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Leitch JA, McMullin CL, Paterson AJ, Mahon MF, Bhonoah Y, Frost CG. Ruthenium-Catalyzed para
-Selective C−H Alkylation of Aniline Derivatives. Angew Chem Int Ed Engl 2017; 56:15131-15135. [DOI: 10.1002/anie.201708961] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Jamie A. Leitch
- Department of Chemistry; University of Bath; Claverton Down Somerset BA2 7AY UK
| | - Claire L. McMullin
- Department of Chemistry; University of Bath; Claverton Down Somerset BA2 7AY UK
| | - Andrew J. Paterson
- Department of Chemistry; University of Bath; Claverton Down Somerset BA2 7AY UK
| | - Mary F. Mahon
- Department of Chemistry; University of Bath; Claverton Down Somerset BA2 7AY UK
| | - Yunas Bhonoah
- Syngenta; Jealott's Hill International Research Centre; Bracknell Berkshire RG42 6EY UK
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