1
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Talavera M, Mollasalehi S, Braun T. C-H and C-F bond activation of fluorinated propenes at Rh: enabling cross-coupling reactions with outer-sphere C-C coupling. Chem Sci 2024; 15:8472-8477. [PMID: 38846380 PMCID: PMC11151818 DOI: 10.1039/d4sc00951g] [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: 02/08/2024] [Accepted: 04/28/2024] [Indexed: 06/09/2024] Open
Abstract
The reaction of [Rh{(E)-CF[double bond, length as m-dash]CHCF3}(PEt3)3] with Zn(CH3)2 results in the methylation of the alkenyl ligand to give [Rh{(E/Z)-C(CH3)[double bond, length as m-dash]CHCF3}(PEt3)3]. Variable temperature NMR studies allowed the identification of a heterobinuclear rhodium-zinc complex as an intermediate, for which the structure [Rh(CH3)(ZnCH3){(Z)-C(CH3)[double bond, length as m-dash]CHCF3}(PEt3)2] is proposed. Based on these stoichiometric reactions, unique Negishi-type catalytic cross-coupling reactions of fluorinated propenes by consecutive C-H and C-F bond activation steps at room temperature were developed. The C-H bond activation steps provide a fluorinated ligand at Rh and deliver the fluorinated product, whereas the C-F bond activation and C-C coupling occur via outer-sphere nucleophilic attack at the fluorinated alkenyl ligand.
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Affiliation(s)
- Maria Talavera
- Facultad de Química, Universidade de Vigo Campus Universitario 36310 Vigo Spain
- Department of Chemistry, Humboldt Universität zu Berlin Brook-Taylor Straße 2 12489 Berlin Germany
| | - Soodeh Mollasalehi
- Department of Chemistry, Humboldt Universität zu Berlin Brook-Taylor Straße 2 12489 Berlin Germany
| | - Thomas Braun
- Department of Chemistry, Humboldt Universität zu Berlin Brook-Taylor Straße 2 12489 Berlin Germany
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2
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Li D, Wang H, Chen J, Wu Q. Fluorinated Polymer Donors for Nonfullerene Organic Solar Cells. Chemistry 2024; 30:e202303155. [PMID: 38018363 DOI: 10.1002/chem.202303155] [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: 09/27/2023] [Revised: 11/25/2023] [Accepted: 11/27/2023] [Indexed: 11/30/2023]
Abstract
The rapid development of narrow-bandgap nonfullerene acceptors (NFAs) has boosted the efficiency of organic solar cells (OSCs) over 19 %. The new features of high-performance NFAs, such as visible-NIR light absorption, moderate the highest occupied molecular orbitals (HOMO), and high crystallinity, require polymer donors with matching physical properties. This emphasizes the importance of methods that can effectively tune the physical properties of polymers. Owning to very small atom size and strongest electronegativity, the fluorination has been proved the most efficient strategy to regulate the physical properties of polymer donors, including frontier energy level, absorption coefficient, dielectric constant, crystallinity and charge transport. Owing to the success of fluorination strategy, the vast majority of high-performance polymer donors possess one or more fluorine atoms. In this review, the fluorination synthetic methods, the synthetic route of well-known fluorinated building blocks, the fluorinated polymers which are categorized by the type of donor or acceptor units, and the relationships between the polymer structures, properties, and photovoltaic performances are comprehensively surveyed. We hope this review could provide the readers a deeper insight into fluorination strategy and lay a strong foundation for future innovation of fluorinated polymers.
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Affiliation(s)
- Dongyan Li
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong, Shantou University, Shantou, Guangdong, 515063, China
| | - Huijuan Wang
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong, Shantou University, Shantou, Guangdong, 515063, China
| | - Jinming Chen
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong, Shantou University, Shantou, Guangdong, 515063, China
| | - Qinghe Wu
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong, Shantou University, Shantou, Guangdong, 515063, China
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3
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Chen L, Luo ZF, Ye P, Mao YJ, Xu ZY, Xu DQ, Lou SJ. Z-Selective access to α-trifluoromethyl arylenes through Pd-catalysed fluoroarylation of 1,1-difluoroallenes. Org Biomol Chem 2023; 21:8979-8983. [PMID: 37934046 DOI: 10.1039/d3ob01574b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
The synthesis of stereo-defined α-trifluoromethyl arylenes is of great importance in medical chemistry, organic chemistry, and materials science. However, despite the recent advances, the Z-selective formation of α-trifluoromethyl arylenes has remained underdeveloped. Here, we describe a facile approach towards Z-α-trifluoromethyl arylenes through Pd-catalysed stereoselective fluoroarylation of 1,1-difluoroallenes in the presence of a bulky monophosphine ligand.
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Affiliation(s)
- Lei Chen
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Ze-Feng Luo
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Peng Ye
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Yang-Jie Mao
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Zhen-Yuan Xu
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, 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, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, 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, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
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4
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Tang J, Lu F, Sun Y, Zhang G, Zhang E, Jiang YY. Late-Stage Diversification of Peptides via Pd-Catalyzed Site-Selective δ-C(sp 2)-H Fluorination and Amination. J Org Chem 2023; 88:14165-14171. [PMID: 37751495 DOI: 10.1021/acs.joc.3c01897] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
Site-selective C-H fluorination is an attractive strategy for directly transforming inert C-H bonds into C-F bonds, yet it remains a significant challenge. Herein, we have developed an efficient and versatile strategy for site-selective fluorination and amination of phenylalanine-containing peptides via late-stage Pd-catalyzed δ-C(sp2)-H activation, providing a valuable tool for the in situ synthesis of fluorinated indoline scaffolds within peptides.
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Affiliation(s)
- Jian Tang
- Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, P. R. China
- School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210096, China
| | - Fengjie Lu
- Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, P. R. China
| | - Yi Sun
- Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, P. R. China
| | - Guodong Zhang
- Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, P. R. China
| | - Ensheng Zhang
- Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, P. R. China
| | - Yuan-Ye Jiang
- Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province, School of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, P. R. China
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5
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Hashimoto R, Hanaya K, Sugai T, Higashibayashi S. Unified short syntheses of oxygenated tricyclic aromatic diterpenes by radical cyclization with a photoredox catalyst. Commun Chem 2023; 6:169. [PMID: 37604953 PMCID: PMC10442340 DOI: 10.1038/s42004-023-00979-2] [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: 05/29/2023] [Accepted: 08/08/2023] [Indexed: 08/23/2023] Open
Abstract
The biomimetic two-phase strategy employing polyene cyclization and subsequent oxidation/substitution is an effective approach for divergent syntheses of [6-6-6]-tricyclic diterpenes. However, this strategy requires lengthy sequences for syntheses of oxygenated tricyclic aromatic abietane/podocarpane diterpenes owing to the many linear oxidation/substitution steps after cyclization. Here, we present a new synthetic route based on a convergent reverse two-phase strategy employing a reverse radical cyclization approach, which enabled the unified short syntheses of four aromatic abietane/podocarpane diterpenes and the divergent short syntheses of other related diterpenes. Oxygenated and substituted precursors for cyclization were convergently prepared through Friedel-Crafts acylation and rhodium-catalyzed site-selective iodination. Radical redox cyclization using an iridium photoredox catalyst involving neophyl rearrangement furnished the thermodynamically favored 6-membered ring preferentially. (±)-5,6-Dehydrosugiol, salvinolone, crossogumerin A, and Δ5-nimbidiol were synthesized in only 8 steps. An oxygenated cyclized intermediate was also useful for divergent derivatization to sugiol, ferruginol, saprorthoquinone, cryptomeriololide, and salvinolone.
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Affiliation(s)
- Riichi Hashimoto
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, 105-8512, Japan.
| | - Kengo Hanaya
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, 105-8512, Japan
| | - Takeshi Sugai
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, 105-8512, Japan
| | - Shuhei Higashibayashi
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, 105-8512, Japan.
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6
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Zhang R, Dong Y, Su Y, Zhai W, Xu S. MoS 2/SnS/CoS Heterostructures on Graphene: Lattice-Confinement Synthesis and Boosted Sodium Storage. Molecules 2023; 28:5972. [PMID: 37630224 PMCID: PMC10458794 DOI: 10.3390/molecules28165972] [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: 07/06/2023] [Revised: 07/31/2023] [Accepted: 08/04/2023] [Indexed: 08/27/2023] Open
Abstract
The development of high-efficiency multi-component composite anode nanomaterials for sodium-ion batteries (SIBs) is critical for advancing the further practical application. Numerous multi-component nanomaterials are constructed typically via confinement strategies of surface templating or three-dimensional encapsulation. Herein, a composite of heterostructural multiple sulfides (MoS2/SnS/CoS) well-dispersed on graphene is prepared as an anode nanomaterial for SIBs, via a distinctive lattice confinement effect of a ternary CoMoSn-layered double-hydroxide (CoMoSn-LDH) precursor. Electrochemical testing demonstrates that the composite delivers a high-reversible capacity (627.6 mA h g-1 after 100 cycles at 0.1 A g-1) and high rate capacity of 304.9 mA h g-1 after 1000 cycles at 5.0 A g-1, outperforming those of the counterparts of single-, bi- and mixed sulfides. Furthermore, the enhancement is elucidated experimentally by the dominant capacitive contribution and low charge-transfer resistance. The precursor-based lattice confinement strategy could be effective for constructing uniform composites as anode nanomaterials for electrochemical energy storage.
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Affiliation(s)
- Ruyao Zhang
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China; (R.Z.); (Y.D.); (Y.S.); (W.Z.)
| | - Yan Dong
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China; (R.Z.); (Y.D.); (Y.S.); (W.Z.)
| | - Yu Su
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China; (R.Z.); (Y.D.); (Y.S.); (W.Z.)
| | - Wenkai Zhai
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China; (R.Z.); (Y.D.); (Y.S.); (W.Z.)
| | - Sailong Xu
- Quzhou Institute for Innovation in Resource Chemical Engineering, Quzhou 324000, China
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7
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Zhu J, Xu M, Gong B, Lin A, Gao S. ( Z)-Selective Synthesis of Bromofluoroalkenes via the TMSCF 2Br-Mediated Tandem Reaction with para-Quinone Methides. Org Lett 2023; 25:3271-3275. [PMID: 37104568 DOI: 10.1021/acs.orglett.3c01007] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
We report herein a tandem reaction of para-quinone methides with TMSCF2Br to construct bromofluoroalkenes in a Z-selective manner. While TMSCF2Br has been documented as the precursor of difluoro carbene, it exhibits another possibility in this transformation, a formal bromofluoro carbene surrogate. The alkenyl bromide unit of the products could directly engage in a variety of transformations.
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Affiliation(s)
- Jie Zhu
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Menghua Xu
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Baihui Gong
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Aijun Lin
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Shang Gao
- State Key Laboratory of Natural Medicines (SKLNM) and Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
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8
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Lu MZ, Goh J, Maraswami M, Jia Z, Tian JS, Loh TP. Recent Advances in Alkenyl sp 2 C-H and C-F Bond Functionalizations: Scope, Mechanism, and Applications. Chem Rev 2022; 122:17479-17646. [PMID: 36240299 DOI: 10.1021/acs.chemrev.2c00032] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Alkenes and their derivatives are featured widely in a variety of natural products, pharmaceuticals, and advanced materials. Significant efforts have been made toward the development of new and practical methods to access this important class of compounds by selectively activating the alkenyl C(sp2)-H bonds in recent years. In this comprehensive review, we describe the state-of-the-art strategies for the direct functionalization of alkenyl sp2 C-H and C-F bonds until June 2022. Moreover, metal-free, photoredox, and electrochemical strategies are also covered. For clarity, this review has been divided into two parts; the first part focuses on currently available alkenyl sp2 C-H functionalization methods using different alkene derivatives as the starting materials, and the second part describes the alkenyl sp2 C-F bond functionalization using easily accessible gem-difluoroalkenes as the starting material. This review includes the scope, limitations, mechanistic studies, stereoselective control (using directing groups as well as metal-migration strategies), and their applications to complex molecule synthesis where appropriate. Overall, this comprehensive review aims to document the considerable advancements, current status, and emerging work by critically summarizing the contributions of researchers working in this fascinating area and is expected to stimulate novel, innovative, and broadly applicable strategies for alkenyl sp2 C-H and C-F bond functionalizations in the coming years.
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Affiliation(s)
- Ming-Zhu Lu
- College of Advanced Interdisciplinary Science and Technology, Henan University of Technology, Zhengzhou 450001, China.,School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
| | - Jeffrey Goh
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
| | - Manikantha Maraswami
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
| | - Zhenhua Jia
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Jie-Sheng Tian
- School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Teck-Peng Loh
- College of Advanced Interdisciplinary Science and Technology, Henan University of Technology, Zhengzhou 450001, China.,School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore.,Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
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9
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Wu FW, Mao YJ, Pu J, Li HL, Ye P, Xu ZY, Lou SJ, Xu DQ. Ni-catalysed deamidative fluorination of amides with electrophilic fluorinating reagents. Org Biomol Chem 2022; 20:4091-4095. [PMID: 35522070 DOI: 10.1039/d2ob00519k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We describe here a Ni-catalysed deamidative fluorination of diverse amides with electrophilic fluorinating reagents. Different types of amides including aromatic amides and olefinic amides were well compatible, affording the corresponding acyl fluorides in good to excellent yields.
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Affiliation(s)
- Feng-Wei Wu
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Yang-Jie Mao
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Jun Pu
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Huan-Le Li
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Peng Ye
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Zhen-Yuan Xu
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, 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, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, 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, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
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10
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Mehmood T, Peng L. Polyethylene scaffold net and synthetic grass fragmentation: a source of microplastics in the atmosphere? JOURNAL OF HAZARDOUS MATERIALS 2022; 429:128391. [PMID: 35236024 DOI: 10.1016/j.jhazmat.2022.128391] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/19/2022] [Accepted: 01/27/2022] [Indexed: 05/12/2023]
Abstract
Microplastics (MPs) implications in the atmosphere are of current global concern. Currently, there is a growing interest regarding source appointment, fate, level of toxicity, and exposure intensity of ambient air MPs. Recent data suggest that polyethylene (PE) dominates ambient MPs in China's megacities. Albeit understanding of PE sources is limited and restricted to typical sources polluting terrestrial and marine environments. However, the air is a distinct environmental component and may have some separate pollution sources as well as the relative contribution of different sources could also contrast in different environments. Urbanization and fast construction activity resulting from increased economic growth in these places might be a potential source of ambient PE. Recently, the use of scaffold netting on construction sites and synthetic grass as land covering sheets has been on the rise. Generally, these PE items are often inferior and composed of recycled material, making them more prone to degradation. Also, because these items were continually exposed to open air, there is a considerable risk of fragmentation and atmospheric mixing. Therefore, unchecked and excessive usage of these materials can be risky. Here, PE's physical and chemical characteristics, transport and health risks in urban air are discussed here.
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Affiliation(s)
- Tariq Mehmood
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, PR China; College of Ecology and Environment, Hainan University, Haikou, Hainan Province, PR China 570228
| | - Licheng Peng
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, PR China; College of Ecology and Environment, Hainan University, Haikou, Hainan Province, PR China 570228.
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11
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Khater DZ, Amin RS, Mahmoud M, El-Khatib KM. Evaluation of mixed transition metal (Co, Mn, and Cu) oxide electrocatalysts anchored on different carbon supports for robust oxygen reduction reaction in neutral media. RSC Adv 2022; 12:2207-2218. [PMID: 35425267 PMCID: PMC8979034 DOI: 10.1039/d1ra07721j] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Accepted: 01/09/2022] [Indexed: 11/23/2022] Open
Abstract
Oxygen reduction reaction (ORR) remains a pivotal factor in assessing the overall efficiency of energy conversion and storage technologies. A promising family of ORR electrocatalysts is mixed transition-metal oxides (MTMOs), which have recently gained a growing research interest. In this study, we developed MTMOs with different compositions (designated as AxB3−xO4; A = Cu, B = Co or Mn) anchored on two different carbon supports (activated carbon Vulcan XC-72 (AC) and graphene (G)) for catalyzing ORR in neutral media. Four different MTMO electrocatalysts (i.e., MnO2–CuO/AC, CoO–CuO/AC, CoO–CuO/G, and MnO2–CuO/G) were synthesized by a simple and scalable co-precipitation method. We documented the morphology and electrocatalytic properties of MTMO electrocatalysts using transmission and scanning electron microscopy, X-ray diffraction (XRD), X-ray photoelectron spectrometer (XPS), energy dispersive X-ray (EDX), and electrochemical techniques. Generally, MTMOs exhibited remarkably high ORR electrocatalytic activity with MTMOs anchored on an activated carbon support outperforming their respective MTMOs anchored on a graphene support, highlighting the importance of the catalyst support in determining the overall ORR activity of electrocatalysts. MnO2–CuO/AC has the highest diffusion limiting current density (j) value of 4.2 mA cm−2 at −600 mV (vs. SHE), which is ∼1.1–1.7-fold higher than other tested electrocatalysts (i.e., 3.9, 3.5, and 2.7 mA cm−2 for CoO–CuO/AC, CoO–CuO/G, and MnO2–CuO/G, respectively), and slightly lower than Pt/C (5.1 mA cm−2) at the same potential value. Moreover, all electrocatalysts exhibited good linearity and parallelism of the Koutechy–Levich (K–L) plots, suggesting that ORR followed first-order reaction kinetics with the number of electrons involved being close to four. Benefiting from their remarkable ORR electrochemical activities and low cost, our results reveal that non-precious MTMOs are efficient enough to replace expensive Pt for broad applications in energy conversion and electrocatalysis in neutral media, such as microbial fuel cells. Mixed transition metal (Co, Mn, and Cu) oxide electrocatalysts anchored on different carbon supports for oxygen reduction reaction.![]()
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Affiliation(s)
- Dena Z Khater
- Chemical Engineering & Pilot Plant Department, Engineering Research Institute, National Research Centre 33 El-Buhouth St., Dokki Cairo 12311 Egypt
| | - R S Amin
- Chemical Engineering & Pilot Plant Department, Engineering Research Institute, National Research Centre 33 El-Buhouth St., Dokki Cairo 12311 Egypt
| | - Mohamed Mahmoud
- Water Pollution Research Department, National Research Centre 33 El-Buhouth St., Dokki Cairo 12311 Egypt
| | - K M El-Khatib
- Chemical Engineering & Pilot Plant Department, Engineering Research Institute, National Research Centre 33 El-Buhouth St., Dokki Cairo 12311 Egypt
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12
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13
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Wu Z, Wu Z, Sun X, Qi W, Zhang Z, Zhang Y. Palladium-Catalyzed Intramolecular Cross-Coupling of Unactivated C(sp 3)-H and C(sp 2)-H Bonds. Org Lett 2021; 23:7161-7165. [PMID: 34477389 DOI: 10.1021/acs.orglett.1c02567] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Direct C-H/C-H coupling represents an appealing method for the construction of C-C bonds, and the cross-coupling of unactivated C(sp3)-H and C(sp2)-H bonds is challenging and remains to be investigated. We have developed the Pd-catalyzed intramolecular coupling of inert C(sp3)-H and C(sp2)-H bonds. The reaction proceeded by o-methyl oxime-directed aryl C(sp2)-H activation and subsequent alkyl C(sp3)-H cleavage, generating C(sp2),C(sp3)-palladacycles as the key intermediates. Dihydrobenzofurans and indanes were formed as the final products.
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Affiliation(s)
- Zhuo Wu
- School of Chemical Science and Engineering, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Zechen Wu
- School of Chemical Science and Engineering, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Xueliang Sun
- School of Chemical Science and Engineering, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Weixin Qi
- School of Chemical Science and Engineering, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Zhengyang Zhang
- School of Chemical Science and Engineering, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Yanghui Zhang
- School of Chemical Science and Engineering, Shanghai Key Laboratory of Chemical Assessment and Sustainability, Tongji University, 1239 Siping Road, Shanghai 200092, China
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14
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Zhuang Z, Herron AN, Yu J. Synthesis of Cyclic Anhydrides via Ligand‐Enabled C–H Carbonylation of Simple Aliphatic Acids. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104645] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Zhe Zhuang
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Alastair N. Herron
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
| | - Jin‐Quan Yu
- Department of Chemistry The Scripps Research Institute 10550 North Torrey Pines Road La Jolla CA 92037 USA
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15
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Britton R, Gouverneur V, Lin JH, Meanwell M, Ni C, Pupo G, Xiao JC, Hu J. Contemporary synthetic strategies in organofluorine chemistry. ACTA ACUST UNITED AC 2021. [DOI: 10.1038/s43586-021-00042-1] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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16
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Zhuang Z, Herron AN, Yu JQ. Synthesis of Cyclic Anhydrides via Ligand-Enabled C-H Carbonylation of Simple Aliphatic Acids. Angew Chem Int Ed Engl 2021; 60:16382-16387. [PMID: 33977635 DOI: 10.1002/anie.202104645] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Indexed: 11/08/2022]
Abstract
The development of C(sp3 )-H functionalizations of free carboxylic acids has provided a wide range of versatile C-C and C-Y (Y=heteroatom) bond-forming reactions. Additionally, C-H functionalizations have lent themselves to the one-step preparation of a number of valuable synthetic motifs that are often difficult to prepare through conventional methods. Herein, we report a β- or γ-C(sp3 )-H carbonylation of free carboxylic acids using Mo(CO)6 as a convenient solid CO source and enabled by a bidentate ligand, leading to convenient syntheses of cyclic anhydrides. Among these, the succinic anhydride products are versatile stepping stones for the mono-selective introduction of various functional groups at the β position of the parent acids by decarboxylative functionalizations, thus providing a divergent strategy to synthesize a myriad of carboxylic acids inaccessible by previous β-C-H activation reactions. The enantioselective carbonylation of free cyclopropanecarboxylic acids has also been achieved using a chiral bidentate thioether ligand.
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Affiliation(s)
- Zhe Zhuang
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Alastair N Herron
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA, 92037, USA
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17
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Wu Q, Mao YJ, Zhou K, Wang S, Chen L, Xu ZY, Lou SJ, Xu DQ. Pd-Catalysed direct C(sp 2)-H fluorination of aromatic ketones: concise access to anacetrapib. Chem Commun (Camb) 2021; 57:4544-4547. [PMID: 33956008 DOI: 10.1039/d1cc01047f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The Pd-cataylsed direct ortho-C(sp2)-H fluorination of aromatic ketones has been developed for the first time. The reaction features good regioselectivity and simple operations, constituting an alternative shortcut to access fluorinated ketones. A concise synthesis of anacetrapib has also been achieved by using late-stage C-H fluorination as a key step.
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Affiliation(s)
- Qiuzi Wu
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Yang-Jie Mao
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, 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, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Shuang Wang
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Lei Chen
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Zhen-Yuan Xu
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, 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, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, 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, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
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18
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Wu QZ, Mao YJ, Zhou K, Hao HY, Chen L, Wang S, Xu ZY, Lou SJ, Xu DQ. Regioselective C(sp 3)-H fluorination of ketones: from methyl to the monofluoromethyl group. Chem Commun (Camb) 2021; 57:765-768. [PMID: 33355557 DOI: 10.1039/d0cc07093a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we report a novel strategy to access CH2F-containing ketones through Pd-catalysed β-selective methyl C(sp3)-H fluorination. The reaction features high regioselectivity and a broad substrate scope, constituting a modular method for the late-stage transformation of the native methyl (CH3) into the monofluoromethyl (CH2F) group.
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Affiliation(s)
- Qiu-Zi Wu
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Yang-Jie Mao
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, 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, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Hong-Yan Hao
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Lei Chen
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Shuang Wang
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
| | - Zhen-Yuan Xu
- Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, 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, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, 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, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
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19
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Huang A, Han Y, Wu P, Gao Y, Huo Y, Chen Q, Li X. Ligand-accelerated site-selective Csp 2–H and Csp 3–H alkynylations of alcohols via Pd( ii) catalysis. Org Chem Front 2021. [DOI: 10.1039/d1qo01095f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A ligand accelerated site-selective C–H alkynylation, including secondary and tertiary Csp3–H alkynylation of weakly coordinated yet synthetically promising alcohols, via putative 6, 7 and 8-membered palladacycle intermediates, was developed.
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Affiliation(s)
- Aidong Huang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, No. 100 Waihuan Xi Road Guangzhou Higher Education Mega Center, Guangzhou, 510006, China
| | - Yishen Han
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, No. 100 Waihuan Xi Road Guangzhou Higher Education Mega Center, Guangzhou, 510006, China
| | - Peiqing Wu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, No. 100 Waihuan Xi Road Guangzhou Higher Education Mega Center, Guangzhou, 510006, China
| | - Yang Gao
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, No. 100 Waihuan Xi Road Guangzhou Higher Education Mega Center, Guangzhou, 510006, China
| | - Yanping Huo
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, No. 100 Waihuan Xi Road Guangzhou Higher Education Mega Center, Guangzhou, 510006, China
| | - Qian Chen
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, No. 100 Waihuan Xi Road Guangzhou Higher Education Mega Center, Guangzhou, 510006, China
| | - Xianwei Li
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, No. 100 Waihuan Xi Road Guangzhou Higher Education Mega Center, Guangzhou, 510006, China
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20
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Ang ECX, Tan CH. Golden Jubilee of Singapore National Institute of Chemistry (1970-2020): Celebrating its Partnership with Wiley-VCH. Angew Chem Int Ed Engl 2020; 59:19728-19731. [PMID: 32812317 DOI: 10.1002/anie.202002227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Indexed: 11/08/2022]
Abstract
This year Singapore National Institute of Chemistry (SNIC) is celebrating its golden jubilee (1970-2020). Wiley-VCH has been a steadfast partner accompanying the rapid rise of chemistry research in Singapore. In celebration of this golden jubilee, we highlight 50 significant papers published in Angewandte Chemie by scholars currently based in Singapore, covering the widest possible spectrum of chemistry research.
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Affiliation(s)
- Esther Cai Xia Ang
- Singapore National Institute of Chemistry, SPMS-CBC-04-18.5, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Choon-Hong Tan
- Singapore National Institute of Chemistry, SPMS-CBC-04-18.5, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
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21
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Ang ECX, Tan C. Golden Jubilee of Singapore National Institute of Chemistry (1970–2020): Celebrating its Partnership with Wiley‐VCH. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202002227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Esther Cai Xia Ang
- Singapore National Institute of Chemistry SPMS-CBC-04-18.5 School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
| | - Choon‐Hong Tan
- Singapore National Institute of Chemistry SPMS-CBC-04-18.5 School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore
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22
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Xiong X, Mao YJ, Hao HY, He YT, Xu ZY, Luo G, Lou SJ, Xu DQ. Nitrate promoted mild and versatile Pd-catalysed C(sp 2)-H oxidation with carboxylic acids. Org Biomol Chem 2020; 18:6732-6737. [PMID: 32832956 DOI: 10.1039/d0ob01124j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A nitrate-promoted Pd-catalysed mild cross-dehydrogenative C(sp2)-H bond oxidation of oximes or azobenzenes with diverse carboxylic acids has been developed. In contrast to the previous catalytic systems, this protocol features mild conditions (close to room temperature for most cases) and a broad substrate scope (up to 64 examples), thus constituting a versatile method to directly prepare diverse O-aryl esters. Moreover, the superiority of the nitrate additive in this mild transformation was further determined by experimental and computational evidence.
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Affiliation(s)
- Xue Xiong
- College of Chemical Engineering, Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Key Laboratory of Green Pesticides and Cleaner Production Technology of Zhejiang Province, Zhejiang University of Technology, Hangzhou 310014, P. R. China.
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23
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Liu Y, Tian Y, Su K, Guo X, Chen B. Rhodium-catalyzed ortho-acrylation of aryl ketone O-methyl oximes with cyclopropenones. Org Biomol Chem 2020; 18:3823-3826. [PMID: 32396151 DOI: 10.1039/d0ob00064g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
An efficient Rh-catalyzed ortho-acrylation reaction for the synthesis of chalcones from O-methyl ketoximes and cyclopropenones via C-H bond activation has been described. This cross-coupling reaction exhibits high functional group tolerance and regioselectivity. A wide range of chalcone derivatives are obtained in moderate to good yields under mild conditions.
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Affiliation(s)
- Yafeng Liu
- State Key Laboratory of Applied Organic Chemistry, Key laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Department of Chemistry, Lanzhou University, Lanzhou, Gansu, China.
| | - Yuan Tian
- State Key Laboratory of Applied Organic Chemistry, Key laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Department of Chemistry, Lanzhou University, Lanzhou, Gansu, China.
| | - Kexin Su
- State Key Laboratory of Applied Organic Chemistry, Key laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Department of Chemistry, Lanzhou University, Lanzhou, Gansu, China.
| | - Xin Guo
- School of Chemistry and Chemical Engineering, North Minzu University, Yinchuan, China
| | - Baohua Chen
- State Key Laboratory of Applied Organic Chemistry, Key laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, Department of Chemistry, Lanzhou University, Lanzhou, Gansu, China.
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24
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Dorel R, Boehm P, Schwinger DP, Hartwig JF. Copper-Mediated Fluorination of Aryl Trisiloxanes with Nucleophilic Fluoride. Chemistry 2020; 26:1759-1762. [PMID: 31872488 PMCID: PMC7266656 DOI: 10.1002/chem.201905040] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 12/12/2019] [Indexed: 11/06/2022]
Abstract
A method for the nucleophilic fluorination of heptamethyl aryl trisiloxanes to form fluoroarenes is reported. The reaction proceeds in the presence of Cu(OTf)2 and KHF2 as the fluoride source under mild conditions for a broad range of heptamethyltrisiloxyarenes with high functional group tolerance. The combination of this method with the silylation of aryl C-H bonds enables the regioselective fluorination of non-activated arenes controlled by steric effects following a two-step protocol.
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Affiliation(s)
- Ruth Dorel
- Department of Chemistry, University of California, Berkeley, Berkeley, California, 94720, USA
| | - Philip Boehm
- Department of Chemistry, University of California, Berkeley, Berkeley, California, 94720, USA
| | - Daniel P Schwinger
- Department of Chemistry, University of California, Berkeley, Berkeley, California, 94720, USA
| | - John F Hartwig
- Department of Chemistry, University of California, Berkeley, Berkeley, California, 94720, USA
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25
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Liu M, Zhang Z, Song J, Liu S, Liu H, Han B. Nitrogen Dioxide Catalyzed Aerobic Oxidative Cleavage of C(OH)–C Bonds of Secondary Alcohols to Produce Acids. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908788] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Mingyang Liu
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences Zhongguancun North First Street 2 100190 Beijing P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
- Physical Science LaboratoryHuairou National Comprehensive Science Center No. 5 Yanqi East Second Street Beijing 101400 China
| | - Zhanrong Zhang
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences Zhongguancun North First Street 2 100190 Beijing P. R. China
| | - Jinliang Song
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences Zhongguancun North First Street 2 100190 Beijing P. R. China
- Physical Science LaboratoryHuairou National Comprehensive Science Center No. 5 Yanqi East Second Street Beijing 101400 China
| | - Shuaishuai Liu
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences Zhongguancun North First Street 2 100190 Beijing P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
- Physical Science LaboratoryHuairou National Comprehensive Science Center No. 5 Yanqi East Second Street Beijing 101400 China
| | - Huizhen Liu
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences Zhongguancun North First Street 2 100190 Beijing P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
- Physical Science LaboratoryHuairou National Comprehensive Science Center No. 5 Yanqi East Second Street Beijing 101400 China
| | - Buxing Han
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences Zhongguancun North First Street 2 100190 Beijing P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
- Physical Science LaboratoryHuairou National Comprehensive Science Center No. 5 Yanqi East Second Street Beijing 101400 China
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26
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Liu M, Zhang Z, Song J, Liu S, Liu H, Han B. Nitrogen Dioxide Catalyzed Aerobic Oxidative Cleavage of C(OH)–C Bonds of Secondary Alcohols to Produce Acids. Angew Chem Int Ed Engl 2019; 58:17393-17398. [DOI: 10.1002/anie.201908788] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Revised: 09/05/2019] [Indexed: 02/05/2023]
Affiliation(s)
- Mingyang Liu
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences Zhongguancun North First Street 2 100190 Beijing P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
- Physical Science LaboratoryHuairou National Comprehensive Science Center No. 5 Yanqi East Second Street Beijing 101400 China
| | - Zhanrong Zhang
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences Zhongguancun North First Street 2 100190 Beijing P. R. China
| | - Jinliang Song
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences Zhongguancun North First Street 2 100190 Beijing P. R. China
- Physical Science LaboratoryHuairou National Comprehensive Science Center No. 5 Yanqi East Second Street Beijing 101400 China
| | - Shuaishuai Liu
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences Zhongguancun North First Street 2 100190 Beijing P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
- Physical Science LaboratoryHuairou National Comprehensive Science Center No. 5 Yanqi East Second Street Beijing 101400 China
| | - Huizhen Liu
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences Zhongguancun North First Street 2 100190 Beijing P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
- Physical Science LaboratoryHuairou National Comprehensive Science Center No. 5 Yanqi East Second Street Beijing 101400 China
| | - Buxing Han
- Beijing National Laboratory for Molecular SciencesKey Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of Sciences Zhongguancun North First Street 2 100190 Beijing P. R. China
- University of Chinese Academy of Sciences Beijing 100049 P. R. China
- Physical Science LaboratoryHuairou National Comprehensive Science Center No. 5 Yanqi East Second Street Beijing 101400 China
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27
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Tomberg A, Muratore MÉ, Johansson MJ, Terstiege I, Sköld C, Norrby PO. Relative Strength of Common Directing Groups in Palladium-Catalyzed Aromatic C-H Activation. iScience 2019; 20:373-391. [PMID: 31614320 PMCID: PMC6818342 DOI: 10.1016/j.isci.2019.09.035] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 08/29/2019] [Accepted: 09/24/2019] [Indexed: 11/17/2022] Open
Abstract
Efficient functionalization of C-H bonds can be achieved using transition metal catalysts, such as Pd(OAc)2. To better control the regioselectivity in these reactions, some functional groups on the substrate may be used as directing groups, guiding the reactivity to an ortho position. Herein, we describe a methodology to score the relative strength of such directing groups in palladium-catalyzed aromatic C-H activation. The results have been collected into a scale that serves to predict the regioselectivity on molecules with multiple competing directing groups. We demonstrate that this scale yields accurate predictions on over a hundred examples, taken from the literature. In addition to the regioselectivity prediction on complex molecules, the knowledge of the relative strengths of directing groups can also be used to work with new combinations of functionalities, exploring uncharted chemical space.
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Affiliation(s)
- Anna Tomberg
- Hit Discovery, Discovery Sciences, R&D, AstraZeneca Gothenburg, Mölndal 431 83, Sweden
| | - Michael Éric Muratore
- Medicinal Chemistry, Research and Early Development Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca Gothenburg, Mölndal 431 83, Sweden
| | - Magnus Jan Johansson
- Medicinal Chemistry, Research and Early Development Cardiovascular, Renal and Metabolism, BioPharmaceuticals R&D, AstraZeneca Gothenburg, Mölndal 431 83, Sweden
| | - Ina Terstiege
- Respiratory, BioPharmaceuticals R&D, AstraZeneca Gothenburg, Mölndal 431 83, Sweden
| | - Christian Sköld
- Department of Medicinal Chemistry, Drug Design and Development, Uppsala University, Box 574, Uppsala 751 23, Sweden
| | - Per-Ola Norrby
- Data Science & Modelling, Pharmaceutical Sciences, R&D, AstraZeneca Gothenburg, Mölndal 431 83, Sweden.
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28
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Li X, Shi X, Li X, Shi D. Recent advances in transition-metal-catalyzed incorporation of fluorine-containing groups. Beilstein J Org Chem 2019; 15:2213-2270. [PMID: 31598178 PMCID: PMC6774084 DOI: 10.3762/bjoc.15.218] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 09/03/2019] [Indexed: 01/24/2023] Open
Abstract
Fluorine chemistry plays an increasingly important role in pharmaceutical, agricultural, and materials industries. The incorporation of fluorine-containing groups into organic molecules can improve their chemical and physical properties, which attracts continuous interest in organic synthesis. Among various reported methods, transition-metal-catalyzed fluorination/fluoroalkylation has emerged as a powerful method for the construction of these compounds. This review attempts to describe the major advances in the transition-metal-catalyzed incorporation of fluorine, trifluoromethyl, difluoromethyl, trifluoromethylthio, and trifluoromethoxy groups reported between 2011 and 2019.
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Affiliation(s)
- Xiaowei Li
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266000, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaolin Shi
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266000, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiangqian Li
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, China
| | - Dayong Shi
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, China
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29
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Szpera R, Moseley DFJ, Smith LB, Sterling AJ, Gouverneur V. Fluorierung von C‐H‐Bindungen: Entwicklungen und Perspektiven. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201814457] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Robert Szpera
- Chemistry Research Laboratory Oxford University 12 Mansfield Road Oxford OX1 3TA Großbritannien
| | - Daniel F. J. Moseley
- Chemistry Research Laboratory Oxford University 12 Mansfield Road Oxford OX1 3TA Großbritannien
| | - Lewis B. Smith
- Chemistry Research Laboratory Oxford University 12 Mansfield Road Oxford OX1 3TA Großbritannien
| | - Alistair J. Sterling
- Chemistry Research Laboratory Oxford University 12 Mansfield Road Oxford OX1 3TA Großbritannien
| | - Véronique Gouverneur
- Chemistry Research Laboratory Oxford University 12 Mansfield Road Oxford OX1 3TA Großbritannien
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30
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Szpera R, Moseley DFJ, Smith LB, Sterling AJ, Gouverneur V. The Fluorination of C-H Bonds: Developments and Perspectives. Angew Chem Int Ed Engl 2019; 58:14824-14848. [PMID: 30759327 DOI: 10.1002/anie.201814457] [Citation(s) in RCA: 246] [Impact Index Per Article: 49.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Indexed: 12/16/2022]
Abstract
This Review summarizes advances in fluorination by C(sp2 )-H and C(sp3 )-H activation. Transition-metal-catalyzed approaches championed by palladium have allowed the installation of a fluorine substituent at C(sp2 ) and C(sp3 ) sites, exploiting the reactivity of high-oxidation-state transition-metal fluoride complexes combined with the use of directing groups (some transient) to control site and stereoselectivity. The large majority of known methods employ electrophilic fluorination reagents, but methods combining a nucleophilic fluoride source with an oxidant have appeared. External ligands have proven to be effective for C(sp3 )-H fluorination directed by weakly coordinating auxiliaries, thereby enabling control over reactivity. Methods relying on the formation of radical intermediates are complementary to transition-metal-catalyzed processes as they allow for undirected C(sp3 )-H fluorination. To date, radical C-H fluorinations mainly employ electrophilic N-F fluorination reagents but a unique MnIII -catalyzed oxidative C-H fluorination using fluoride has been developed. Overall, the field of late-stage nucleophilic C-H fluorination has progressed much more slowly, a state of play explaining why C-H 18 F-fluorination is still in its infancy.
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Affiliation(s)
- Robert Szpera
- Chemistry Research Laboratory, Oxford University, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Daniel F J Moseley
- Chemistry Research Laboratory, Oxford University, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Lewis B Smith
- Chemistry Research Laboratory, Oxford University, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Alistair J Sterling
- Chemistry Research Laboratory, Oxford University, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Véronique Gouverneur
- Chemistry Research Laboratory, Oxford University, 12 Mansfield Road, Oxford, OX1 3TA, UK
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31
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Tang L, Yang Z, Jiao J, Cui Y, Zou G, Zhou Q, Zhou Y, Rao W, Ma X. Chemoselective Mono- and Difluorination of 1,3-Dicarbonyl Compounds. J Org Chem 2019; 84:10449-10458. [PMID: 31335142 DOI: 10.1021/acs.joc.9b01808] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
By altering the amount of Selectfluor, the highly selective mono- and difluorination of 1,3-dicarbonyl compounds has been achieved, affording a variety of 2-fluoro- and 2,2-difluoro-1,3-dicarbonyl compounds in good to excellent yields. The reaction can be readily performed in aqueous media without any catalyst and base, which features practical and convenient fluorination. Importantly, a gram-scale reaction, transformation of 2-fluoro-1,3-diphenylpropane-1,3-dione to 4-fluoro-1,3,5-triphenyl-1H-pyrazole, and chlorination and bromination of 1,3-dicarbonyl compounds are realized to further exhibit its synthetic utility.
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Affiliation(s)
- Lin Tang
- Henan Key Laboratory of Utilization of Non-metallic Mineral in the Sourth of Henan , Xinyang 464000 , P. R. China
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Abidi O, Boubaker T, Hierso JC, Roger J. Solvent-free ruthenium-catalysed triflate coupling as a convenient method for selective azole-o-C-H monoarylation. Org Biomol Chem 2019; 17:5916-5919. [PMID: 31149701 DOI: 10.1039/c9ob00806c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Metal-catalysed ortho-directed C-H functionalization usually faces selectivity issues in the competition between mono- and disubstitution processes. We report herein the ruthenium-catalysed N-directed C-H monoarylation of arylpyrazoles with a selectivity of up to 96% or that generally reaches values above 80%. This selectivity is an effect of solvent-free conditions associated with sulfonate reagents, in the absence of frequently used acidic additives.
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Affiliation(s)
- Oumaima Abidi
- Institut de Chimie Moléculaire de l'Université de Bourgogne, UMR-CNRS 6302, Université de Bourgogne Franche-Comté (UBFC), 9 avenue Alain Savary, 21078 Dijon, France. and Laboratoire de Chimie Hétérocyclique, Produits Naturels et Réactivité, Université de Monastir, Avenue de l'Environnement, 5019 Monastir, Tunisie
| | - Taoufik Boubaker
- Laboratoire de Chimie Hétérocyclique, Produits Naturels et Réactivité, Université de Monastir, Avenue de l'Environnement, 5019 Monastir, Tunisie
| | - Jean-Cyrille Hierso
- Institut de Chimie Moléculaire de l'Université de Bourgogne, UMR-CNRS 6302, Université de Bourgogne Franche-Comté (UBFC), 9 avenue Alain Savary, 21078 Dijon, France. and Institut Universitaire de France (IUF), 103 Boulevard Saint-Michel, 75005 Paris Cedex, France
| | - Julien Roger
- Institut de Chimie Moléculaire de l'Université de Bourgogne, UMR-CNRS 6302, Université de Bourgogne Franche-Comté (UBFC), 9 avenue Alain Savary, 21078 Dijon, France.
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34
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Schreib BS, Carreira EM. Palladium-Catalyzed Regioselective C–H Iodination of Unactivated Alkenes. J Am Chem Soc 2019; 141:8758-8763. [DOI: 10.1021/jacs.9b03998] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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35
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Mao YJ, Luo G, Hao HY, Xu ZY, Lou SJ, Xu DQ. Anion ligand promoted selective C–F bond reductive elimination enables C(sp2)–H fluorination. Chem Commun (Camb) 2019; 55:14458-14461. [DOI: 10.1039/c9cc07726j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
A detailed mechanism study on the anion ligand promoted selective C–H bond fluorination is reported.
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Affiliation(s)
- Yang-Jie Mao
- College of Chemical Engineering
- Catalytic Hydrogenation Research Center
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
| | - Gen Luo
- State Key Laboratory of Fine Chemicals
- School of Chemical Engineering
- Dalian University of Technology
- Dalian 116024
- P. R. China
| | - Hong-Yan Hao
- College of Chemical Engineering
- Catalytic Hydrogenation Research Center
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
| | - Zhen-Yuan Xu
- College of Chemical Engineering
- Catalytic Hydrogenation Research Center
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
| | - Shao-Jie Lou
- College of Chemical Engineering
- Catalytic Hydrogenation Research Center
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
| | - Dan-Qian Xu
- College of Chemical Engineering
- Catalytic Hydrogenation Research Center
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology
- Zhejiang University of Technology
- Hangzhou 310014
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36
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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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37
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Liu JL, Zhu ZF, Liu F. Cyanofluorination of vinyl ethers enabled by electron donor–acceptor complexes. Org Chem Front 2019. [DOI: 10.1039/c8qo01143e] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The reaction is operationally simple and conducted under ambient conditions, allowing the access to highly functionalized α-alkoxy-β-fluoronitriles bearing quaternary carbons that are difficult to access by existing methods.
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Affiliation(s)
- Jia-Li Liu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry
- College of Pharmaceutical Sciences
- Soochow University
- Suzhou
- People's Republic of China
| | - Ze-Fan Zhu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry
- College of Pharmaceutical Sciences
- Soochow University
- Suzhou
- People's Republic of China
| | - Feng Liu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry
- College of Pharmaceutical Sciences
- Soochow University
- Suzhou
- People's Republic of China
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38
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Testa C, Roger J, Fleurat-Lessard P, Hierso JC. Palladium-Catalyzed Electrophilic C-H-Bond Fluorination: Mechanistic Overview and Supporting Evidence. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801138] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Christelle Testa
- Institut de Chimie Moléculaire de l'Université de Bourgogne; UMR-CNRS 6302; Université de Bourgogne Franche-Comté; 9, avenue Alain Savary 21078 Dijon France
| | - Julien Roger
- Institut de Chimie Moléculaire de l'Université de Bourgogne; UMR-CNRS 6302; Université de Bourgogne Franche-Comté; 9, avenue Alain Savary 21078 Dijon France
| | - Paul Fleurat-Lessard
- Institut de Chimie Moléculaire de l'Université de Bourgogne; UMR-CNRS 6302; Université de Bourgogne Franche-Comté; 9, avenue Alain Savary 21078 Dijon France
| | - Jean-Cyrille Hierso
- Institut de Chimie Moléculaire de l'Université de Bourgogne; UMR-CNRS 6302; Université de Bourgogne Franche-Comté; 9, avenue Alain Savary 21078 Dijon France
- Institut Universitaire de France (IUF); 103 Boulevard Saint Michel 75005 Paris Cedex France
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39
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Mao YJ, Lou SJ, Hao HY, Xu DQ. Selective C(sp 3 )-H and C(sp 2 )-H Fluorination of Alcohols Using Practical Auxiliaries. Angew Chem Int Ed Engl 2018; 57:14085-14089. [PMID: 30161283 DOI: 10.1002/anie.201808021] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 08/23/2018] [Indexed: 12/30/2022]
Abstract
Selective introduction of fluorine into molecules by the cleavage of inert C-H bonds is of central academic and synthetic interest, yet remains challenging. Given the central role of alcohols in organic chemistry as the most ubiquitous building blocks, a versatile and selective C(sp3 )-H and C(sp2 )-H fluorination of simple alcohols, enabled by novel designed exo-directing groups, is described. C(sp2 )-H bond fluorination was achieved by using a simple acetone oxime as auxiliary, whereas a new, modular and easily accessible bidentate auxiliary was developed for the efficient and site-selective fluorination of various primary methyl, methylene, and benzylic C(sp3 )-H bonds. Fluorinated alcohols can readily be accessed by the removal of auxiliaries, and significantly expands the synthetic prospect of the present procedure.
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Affiliation(s)
- Yang-Jie Mao
- College of Chemical Engineering Zhejiang University of Technology, Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, 18 Chaowang Road, Hangzhou, China
| | - Shao-Jie Lou
- College of Chemical Engineering Zhejiang University of Technology, Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, 18 Chaowang Road, Hangzhou, China
| | - Hong-Yan Hao
- College of Chemical Engineering Zhejiang University of Technology, Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, 18 Chaowang Road, Hangzhou, China
| | - Dan-Qian Xu
- College of Chemical Engineering Zhejiang University of Technology, Catalytic Hydrogenation Research Center, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, 18 Chaowang Road, Hangzhou, China
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40
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Mao YJ, Lou SJ, Hao HY, Xu DQ. Selective C(sp3
)−H and C(sp2
)−H Fluorination of Alcohols Using Practical Auxiliaries. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201808021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yang-Jie Mao
- College of Chemical Engineering Zhejiang University of Technology, Catalytic Hydrogenation Research Center; State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology; 18 Chaowang Road Hangzhou China
| | - Shao-Jie Lou
- College of Chemical Engineering Zhejiang University of Technology, Catalytic Hydrogenation Research Center; State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology; 18 Chaowang Road Hangzhou China
| | - Hong-Yan Hao
- College of Chemical Engineering Zhejiang University of Technology, Catalytic Hydrogenation Research Center; State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology; 18 Chaowang Road Hangzhou China
| | - Dan-Qian Xu
- College of Chemical Engineering Zhejiang University of Technology, Catalytic Hydrogenation Research Center; State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology; 18 Chaowang Road Hangzhou China
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41
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Maity S, Das D, Sarkar S, Samanta R. Direct Pd(II)-Catalyzed Site-Selective C5-Arylation of 2-Pyridone Using Aryl Iodides. Org Lett 2018; 20:5167-5171. [DOI: 10.1021/acs.orglett.8b02112] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Saurabh Maity
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Debapratim Das
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Souradip Sarkar
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Rajarshi Samanta
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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42
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Zhang Y, Wen C, Zhang C, Li J. Copper-catalyzed ortho-Monofluorination of Aniline Derivatives with Selectfluor Directed by Picolinic Acid Amides. Chem Res Chin Univ 2018. [DOI: 10.1007/s40242-018-8113-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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43
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Ning XQ, Lou SJ, Mao YJ, Xu ZY, Xu DQ. Nitrate-promoted Selective C-H Fluorination of Benzamides and Benzeneacetamides. Org Lett 2018; 20:2445-2448. [PMID: 29634276 DOI: 10.1021/acs.orglett.8b00793] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A versatile and site-selective nitrate-promoted C-H bond fluorination using various weak coordinating amides as intrinsic directing groups was developed. Diverse tertiary and secondary amides underwent selective aromatic C-H bond fluorination, which features broad substrate scope, good regioselectivity, and mild conditions. Moreover, the late-stage C-H bond fluorination of the challenging benzeneacetamides via distal directing was reported for the first time.
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Affiliation(s)
- Xing-Qian Ning
- 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
| | - 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
| | - Zhen-Yuan Xu
- 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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44
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Wu SW, Liu JL, Liu F. cis-Specific cyanofluorination of vinyl azides enabled by electron-donor-acceptor complexes: synthesis of α-azido-β-fluoronitriles. Chem Commun (Camb) 2018; 53:12321-12324. [PMID: 29095445 DOI: 10.1039/c7cc07165e] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Here we report a novel electron-donor-acceptor (EDA) complex-enabled three-component cyanofluorination of vinyl azides under metal-free conditions in a cis-specific manner. This reaction protocol is operationally simple without exclusion of either moisture or oxygen, allowing access to a wide range of highly-functionalized α-azido-β-fluoronitriles bearing quaternary carbons that are difficult to obtain by existing methods.
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Affiliation(s)
- Shu-Wei Wu
- Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases and Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, People's Republic of China.
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45
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Chen XY, Sorensen EJ. Pd-Catalyzed, ortho C-H Methylation and Fluorination of Benzaldehydes Using Orthanilic Acids as Transient Directing Groups. J Am Chem Soc 2018; 140:2789-2792. [PMID: 29412651 DOI: 10.1021/jacs.8b00048] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The direct, Pd-catalyzed ortho C-H methylation and fluorination of benzaldehydes have been accomplished using commercially available orthanilic acids as transient directing groups. In these reactions, the 1-fluoro-2,4,6-trimethylpyridinium salts can be either a bystanding F+ oxidant or an electrophilic fluorinating reagent. An X-ray crystal structure of a benzaldehyde ortho C-H palladation intermediate was obtained using triphenylphosphine as the stabilizing ligand.
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Affiliation(s)
- Xiao-Yang Chen
- Department of Chemistry, Princeton University , Princeton, New Jersey 08544, United States
| | - Erik J Sorensen
- Department of Chemistry, Princeton University , Princeton, New Jersey 08544, United States
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46
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47
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Chen X, Ren J, Xie H, Sun W, Sun M, Wu B. Cobalt(iii)-catalyzed 1,4-addition of C–H bonds of oximes to maleimides. Org Chem Front 2018. [DOI: 10.1039/c7qo00687j] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
An oxime directed cobalt-catalyzed sp2 C–H bond addition reaction was developed with a broad substrate scope and no external additives were needed.
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Affiliation(s)
- Xiangxiang Chen
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710127
- P. R. China
| | - Jiangtao Ren
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710127
- P. R. China
| | - Hu Xie
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710127
- P. R. China
| | - Wei Sun
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710127
- P. R. China
| | - Meng Sun
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710127
- P. R. China
| | - Biao Wu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education
- Department of Chemistry & Materials Science
- Northwest University
- Xi'an 710127
- P. R. China
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48
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Takubo K, A B Mohamed A, Ide T, Saito K, Ikawa T, Yoshimitsu T, Akai S. Regioselective Rearrangement of 4,4-Disubstituted 2-Hydroxycyclohexa-2,5-Dienones under Deoxyfluorination Conditions. J Org Chem 2017; 82:13141-13151. [PMID: 29099595 DOI: 10.1021/acs.joc.7b02208] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The dienone-phenol rearrangement is a useful tool for the synthesis of highly substituted phenols. In our previous study of the rearrangement of 4,4-disubstituted 2-hydroxycyclohexa-2,5-dienone under deoxyfluorination conditions, bond migration proceeded with very poor regioselectivity. In this paper, an acid-mediated rearrangement of O-perfluoroalkylsulfonyl difluorides with regioselective migration toward the β'-carbon is reported. This method allowed the synthesis of a fluorinated analog of allocolchicinoids with improved total yield. Successful application to other substrates was also demonstrated.
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Affiliation(s)
- Keita Takubo
- Graduate School of Pharmaceutical Sciences, Osaka University , 1-6, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Ahmed A B Mohamed
- Graduate School of Pharmaceutical Sciences, Osaka University , 1-6, Yamadaoka, Suita, Osaka 565-0871, Japan.,Faculty of Pharmacy, University of Mansoura , Mansoura 35516, Egypt
| | - Takafumi Ide
- School of Pharmaceutical Sciences, University of Shizuoka , 52-1, Yada, Suruga-ku, Shizuoka, Shizuoka 422-8526, Japan
| | - Kazuyuki Saito
- Graduate School of Pharmaceutical Sciences, Osaka University , 1-6, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takashi Ikawa
- Graduate School of Pharmaceutical Sciences, Osaka University , 1-6, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Takehiko Yoshimitsu
- Graduate School of Pharmaceutical Sciences, Osaka University , 1-6, Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Shuji Akai
- Graduate School of Pharmaceutical Sciences, Osaka University , 1-6, Yamadaoka, Suita, Osaka 565-0871, Japan
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49
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Mboyi CD, Testa C, Reeb S, Genc S, Cattey H, Fleurat-Lessard P, Roger J, Hierso JC. Building Diversity in ortho-Substituted s-Aryltetrazines By Tuning N-Directed Palladium C–H Halogenation: Unsymmetrical Polyhalogenated and Biphenyl s-Aryltetrazines. ACS Catal 2017. [DOI: 10.1021/acscatal.7b03186] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Jean-Cyrille Hierso
- Institut Universitaire de France (IUF), 103 Boulevard Saint Michel, 75005 CEDEX Paris, France
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50
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Guilbaud J, Labonde M, Cattey H, Contal S, Montalbetti C, Pirio N, Roger J, Hierso JC. (2-Pyridyl)sulfonyl Groups for ortho
-Directing Palladium- Catalyzed Carbon-Halogen Bond Formation at Functionalized Arenes. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700858] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Johan Guilbaud
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMuB), UMR-CNRS 6302; Université de Bourgogne Franche-Comté (UBFC); 9 avenue Alain Savary 21078 Dijon France
| | - Marine Labonde
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMuB), UMR-CNRS 6302; Université de Bourgogne Franche-Comté (UBFC); 9 avenue Alain Savary 21078 Dijon France
| | - Hélène Cattey
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMuB), UMR-CNRS 6302; Université de Bourgogne Franche-Comté (UBFC); 9 avenue Alain Savary 21078 Dijon France
| | | | | | - Nadine Pirio
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMuB), UMR-CNRS 6302; Université de Bourgogne Franche-Comté (UBFC); 9 avenue Alain Savary 21078 Dijon France
| | - Julien Roger
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMuB), UMR-CNRS 6302; Université de Bourgogne Franche-Comté (UBFC); 9 avenue Alain Savary 21078 Dijon France
| | - Jean-Cyrille Hierso
- Institut de Chimie Moléculaire de l'Université de Bourgogne (ICMuB), UMR-CNRS 6302; Université de Bourgogne Franche-Comté (UBFC); 9 avenue Alain Savary 21078 Dijon France
- Institut Universitaire de France (IUF); 103 Boulevard Saint Michel 75005 Paris Cedex France
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