1
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Cao J, Ding W, Zou G. Tetrabutylammonium Bromide (TBAB)-Promoted, Pd/Cu-Catalyzed Sonogashira Coupling of N-Tosyl Aryltriazenes. Org Lett 2024; 26:4576-4580. [PMID: 38775280 DOI: 10.1021/acs.orglett.4c01565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Abstract
Sonogashira coupling of N-tosyl aryltriazenes is reported to offer arylalkynes in yields up to 92% with the aid of tetrabutylammonium bromide (TBAB) as a dual activator for both the palladium catalyst and aryltriazenes. Common functional groups could be well tolerated, although large electronic effects from alkynes were observed. TBAB-assisted oxidative addition of palladium(0) to aryltriazene instead of in situ formed arylhalide has been proposed to initiate the catalytic cycle.
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Affiliation(s)
- Jun Cao
- School of Chemistry & Molecular Engineering, East China University of Science & Technology, 130 Meilong Rd, Shanghai 200237, China
| | - Wenbin Ding
- School of Chemistry & Molecular Engineering, East China University of Science & Technology, 130 Meilong Rd, Shanghai 200237, China
| | - Gang Zou
- School of Chemistry & Molecular Engineering, East China University of Science & Technology, 130 Meilong Rd, Shanghai 200237, China
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2
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Borys AM, Vedani L, Hevia E. Stoichiometric and Catalytic Lithium Nickelate-Mediated C-F Bond Alkynylation of Fluoroarenes. J Am Chem Soc 2024; 146:10199-10205. [PMID: 38545862 DOI: 10.1021/jacs.4c02606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/11/2024]
Abstract
Low-valent nickelates have recently been shown to be key intermediates that facilitate challenging cross-coupling reactions under mild conditions. Expanding the synthetic potential of these heterobimetallic complexes, herein we report the success of trilithium nickelate Li3(TMEDA)3Ni(C≡C-Ph)3 in promoting stoichiometric C-F activation of assorted aryl fluorides furnishing novel mixed Li/Ni(0) or Li/Ni(II) species depending on the substrate and conditions employed. These stoichiometric successes can be upgraded to catalytic regimes to enable the atom-efficient alkynylation of aryl fluorides and polyfluoroarenes with lithium acetylides and precatalyst Ni(COD)2, which operates without the intervention of external ligands, Cu cocatalysts, or additives.
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Affiliation(s)
- Andryj M Borys
- Departement für Chemie, Biochemie und Pharmacie, Universität Bern, 3012 Bern, Switzerland
| | - Luca Vedani
- Departement für Chemie, Biochemie und Pharmacie, Universität Bern, 3012 Bern, Switzerland
| | - Eva Hevia
- Departement für Chemie, Biochemie und Pharmacie, Universität Bern, 3012 Bern, Switzerland
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3
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Zhou J, Zhao Z, Mori S, Yamamoto K, Shibata N. Cross-coupling of organic fluorides with allenes: a silyl-radical-relay pathway for the construction of α-alkynyl-substituted all-carbon quaternary centres. Chem Sci 2024; 15:5113-5122. [PMID: 38577357 PMCID: PMC10988592 DOI: 10.1039/d3sc06617g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Accepted: 02/19/2024] [Indexed: 04/06/2024] Open
Abstract
Controlling the transformation of versatile and reactive allenes is a considerable challenge. Herein, we report an efficient silylboronate-mediated cross-coupling reaction of organic fluorides with allenes to construct a series of sterically demanding α-ethynyl-containing all-carbon quaternary centers (ACQCs), using catalyst-free silyl-radical-relay reactions to selectively functionalize highly inert C-F bonds in organic fluorides. The key to the success of this transformation lies in the radical rearrangement of an in situ-generated allenyl radical to form a bulky tertiary propargyl radical; however, the transformation does not show efficiency when using the propargyl isomer directly. This unique reaction enables the cross-coupling of a tertiary carbon radical center with a C(sp2)-F bond or a benzylic C(sp3)-F bond. α-Ethynyl-containing ACQCs with (hetero)aromatic substituents and benzyl were efficiently synthesized in a single step using electronically and sterically diverse organic fluorides and allenes. The practical utility of this protocol is showcased by the late-stage functionalization of bioactive molecules and the modification of a liquid crystalline material.
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Affiliation(s)
- Jun Zhou
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology Gokiso, Showa-ku Nagoya 466-8555 Japan
| | - Zhengyu Zhao
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology Gokiso, Showa-ku Nagoya 466-8555 Japan
| | - Soichiro Mori
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology Gokiso, Showa-ku Nagoya 466-8555 Japan
| | - Katsuhiro Yamamoto
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology Gokiso, Showa-ku Nagoya 466-8555 Japan
| | - Norio Shibata
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology Gokiso, Showa-ku Nagoya 466-8555 Japan
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology Gokiso, Showa-ku Nagoya 466-8555 Japan
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4
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Górski K, Ostojić T, Banasiewicz M, Ouellette ET, Grisanti L, Gryko DT. Conversion of Ketones into Blue-Emitting Electron-Deficient Benzofurans. Chemistry 2023; 29:e202203464. [PMID: 36696516 DOI: 10.1002/chem.202203464] [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: 11/08/2022] [Revised: 01/18/2023] [Accepted: 01/24/2023] [Indexed: 01/27/2023]
Abstract
A novel heavy metal-free and safe synthetic methodology enabling one-step conversion of ketones into corresponding 4,5,6,7-tetrafluorobenzofurans (F4 BFs) has been developed. The presented approach has numerous advantageous qualities, including utilization of readily available substrates, broad scope, scalability, and good reaction yields. Importantly, some of the benzofurans prepared by this method were heretofore inaccessible by any other known transformation. Importantly, furo[2,3-b]pyrazines and heretofore unexplored difuro[2,3-c:3',2'-e]pyridazine can be prepared using this strategy. Spectroscopic studies reveal that for simple systems, absorption and fluorescence maxima fall within the UV spectral range, while π-electron system expansion red-shifts both spectra. Moreover, the good fluorescence quantum yields observed in solution, up to 96 %, are also maintained in the solid state. Experimental results are supported by density functional theory (DFT) calculations. The presented methodology, combined with the spectroscopic characteristics, suggest the possibility of using F4 BFs in the optoelectronic industry (i. e., organic light emitting devices (OLED), organic field-effect transistors (OFET), organic photovoltaics (OPV)) as inexpensive and readily available emissive or semiconductor materials.
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Affiliation(s)
- Krzysztof Górski
- Institute of Organic Chemistry of Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
| | - Tea Ostojić
- Division of Theoretical Physics, Ruđer Bošković Institute, Bijenička cesta 54, 10000, Zagreb, Croatia
| | - Marzena Banasiewicz
- Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668, Warszawa, Poland
| | - Erik T Ouellette
- Department of Chemistry, University of California Berkeley, 420 Latimer Hall, Berkeley, CA, USA
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, USA
| | - Luca Grisanti
- Division of Theoretical Physics, Ruđer Bošković Institute, Bijenička cesta 54, 10000, Zagreb, Croatia
| | - Daniel T Gryko
- Institute of Organic Chemistry of Polish Academy of Sciences, Kasprzaka 44/52, 01-224, Warsaw, Poland
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5
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Advances in Catalytic C–F Bond Activation and Transformation of Aromatic Fluorides. Catalysts 2022. [DOI: 10.3390/catal12121665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The activation and transformation of C–F bonds in fluoro-aromatics is a highly desirable process in organic chemistry. It provides synthetic methods/protocols for the generation of organic compounds possessing single or multiple C–F bonds, and effective catalytic systems for further study of the activation mode of inert chemical bonds. Due to the high polarity of the C–F bond and it having the highest bond energy in organics, C–F activation often faces considerable academic challenges. In this mini-review, the important research achievements in the activation and transformation of aromatic C–F bond, catalyzed by transition metal and metal-free systems, are presented.
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6
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Li XX, Wang JS, You XX, Zhong RL, Su ZM. Theoretical Insight into the Multiple Roles of LiHMDS in Pd-Catalyzed Borylation of Fluorobenzene. J Org Chem 2022; 87:16039-16046. [PMID: 36379013 DOI: 10.1021/acs.joc.2c02165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Pd-catalyzed borylation of fluorobenzene was theoretically studied. DFT calculations revealed that the reaction occurs through an unprecedented 3 + 6-membered ring transition state, in which one LiHMDS (HMDS = hexamethyldisilazane) acts as a ligand and another LiHMDS is essential to provide Li···N and Li···F interactions, overcoming the large destabilization of the strong phenyl-F bond distortion. The characteristic feature of LiHMDS was elucidated by comparing it with HMDS and NaHMDS analogues.
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Affiliation(s)
- Xiao-Xiao Li
- Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130023, P. R. China
| | - Jian-Sen Wang
- Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130023, P. R. China
| | - Xiao-Xia You
- Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130023, P. R. China
| | - Rong-Lin Zhong
- Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130023, P. R. China
| | - Zhong-Min Su
- Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130023, P. R. China
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7
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Gu X, Liu K, Yang L, Xie C, Li M, Wang JJ. Nickel-catalyzed enantioselective α-heteroarylation of ketones via C-F bond activation to construct all-carbon quaternary stereocenters. Chem Sci 2022; 13:12498-12502. [PMID: 36382277 PMCID: PMC9629005 DOI: 10.1039/d2sc03409c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 09/11/2022] [Indexed: 09/19/2023] Open
Abstract
Nickel-catalyzed asymmetric α-heteroarylation of ketones with fluorinated heteroarenes is reported via C-F bond activation. A series of ketones and 2-fluoropyridine derivatives with different functional groups proceed well to provide the corresponding products containing all-carbon quaternary stereocenters in good yields (up to 99% yield) and high ee values (up to 99% ee). In addition, drug molecule donepezil could also be compatible under the reaction conditions to afford late-stage diversification of pharmaceuticals.
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Affiliation(s)
- Xiaodong Gu
- Department of Chemistry, Hong Kong Baptist University Kowloon Hong Kong China
| | - Kexin Liu
- Department of Chemistry, Hong Kong Baptist University Kowloon Hong Kong China
| | - Limin Yang
- College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University Hangzhou 311121 China
| | - Chengyi Xie
- Department of Chemistry, Hong Kong Baptist University Kowloon Hong Kong China
| | - Mingliang Li
- Department of Chemistry, Southern University of Science and Technology (SUSTech) Shenzhen 518055 China
| | - Jun Joelle Wang
- Department of Chemistry, Hong Kong Baptist University Kowloon Hong Kong China
- Department of Chemistry, Southern University of Science and Technology (SUSTech) Shenzhen 518055 China
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8
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Dahiya A, Schoenebeck F. Orthogonal and Modular Arylation of Alkynylgermanes. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Amit Dahiya
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Franziska Schoenebeck
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
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9
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Gao Y, Feng C, Seo T, Kubota K, Ito H. Efficient access to materials-oriented aromatic alkynes via the mechanochemical Sonogashira coupling of solid aryl halides with large polycyclic conjugated systems. Chem Sci 2022; 13:430-438. [PMID: 35126975 PMCID: PMC8729817 DOI: 10.1039/d1sc05257h] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 12/07/2021] [Indexed: 01/23/2023] Open
Abstract
Sonogashira coupling represents an indispensable tool for the preparation of organic materials that contain C(sp)-C(sp2) bonds. Improving the efficiency and generality of this methodology has long been an important research subject in materials science. Here, we show that a high-temperature ball-milling technique enables the highly efficient palladium-catalyzed Sonogashira coupling of solid aryl halides that bear large polyaromatic structures including sparingly soluble substrates and unactivated aryl chlorides. In fact, this new protocol provides various materials-oriented polyaromatic alkynes in excellent yield within short reaction times in the absence of bulk reaction solvents. Notably, we synthesized a new luminescent material via the mechanochemical Sonogashira coupling of poorly soluble Vat Red 1 in a much higher yield compared to those obtained using solution-based conditions. The utility of this method was further demonstrated by the rapid synthesis of a fluorescent metal-organic framework (MOF) precursor via two sequential mechanochemical Sonogashira cross-coupling reactions. The present study illustrates the great potential of Sonogashira coupling using ball milling for the preparation of materials-oriented alkynes and for the discovery of novel functional materials.
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Affiliation(s)
- Yunpeng Gao
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University Sapporo Hokkaido Japan
| | - Chi Feng
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University Sapporo Hokkaido Japan
| | - Tamae Seo
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University Sapporo Hokkaido Japan
| | - Koji Kubota
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University Sapporo Hokkaido Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University Sapporo Hokkaido Japan
| | - Hajime Ito
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University Sapporo Hokkaido Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University Sapporo Hokkaido Japan
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10
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Sahu SK, Choudhury P, Behera PK, Bisoyi T, Sahu RR, Bisoyi A, Gorantla KR, Mallik BS, Mohapatra M, Rout L. An oxygen-bridged bimetallic [Cu–O–Se] catalyst for Sonogashira cross-coupling. NEW J CHEM 2022. [DOI: 10.1039/d1nj04485k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Oxygen bridged bimetallic CuSeO3·2H2O catalyst is used for Sonogashira cross-coupling under ligand free condition. Catalyst is free from palladium up to 0.2 ppm.
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Affiliation(s)
| | | | | | - Tanmayee Bisoyi
- Department of Chemistry, Berhampur University, Odisha-760007, India
| | | | - Abinash Bisoyi
- Department of Chemistry, Berhampur University, Odisha-760007, India
| | | | - Bhabani S. Mallik
- Department of Chemistry, IIT Hydrabad, Sangareddy, Medak-502285, Telangana, India
| | - Manoj Mohapatra
- Homi Bhaba National Institute, Anushakti Nagar, Bhaba Atomic Research Centre, Bombay-400085, India
| | - Laxmidhar Rout
- Department of Chemistry, Berhampur University, Odisha-760007, India
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11
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Highly efficient synthesis of 1,2-disubstituted acetylenes derivatives from the cross-coupling reactions of 1-bromoalkynes with organotitanium reagents. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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12
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Lokolkar MS, Mane PA, Dey S, Bhanage BM. Xantphos‐coordinated palladium dithiolates: Highly efficient catalyst for decarboxylative Sonogashira reaction into corresponding alkynes. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6328] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | - Pravin A. Mane
- Chemistry Division Bhabha Atomic Research Centre Mumbai India
| | - Sandip Dey
- Chemistry Division Bhabha Atomic Research Centre Mumbai India
- Training School Complex Homi Bhabha National Institute Mumbai India
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13
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Fu L, Chen Q, Nishihara Y. Recent Advances in Transition-metal-catalyzed C-C Bond Formation via C(sp 2 )-F Bond Cleavage. CHEM REC 2021; 21:3394-3410. [PMID: 33852203 DOI: 10.1002/tcr.202100053] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 03/29/2021] [Accepted: 03/29/2021] [Indexed: 12/13/2022]
Abstract
The activation of a carbon-fluorine bond is one of the most challenging topics in modern synthetic organic chemistry due to their low reactivity compared to other carbon-halogen bonds. In this review, we present the recent developments since 2015 on cross-coupling reactions that form C-C bonds via cleavage of C(sp2 )-F bonds. Not only the conventional activation of C(sp2 )-F bonds, but also decarbonylative or carbonyl-retentive cleavage of C(acyl)-F bonds will be introduced. This paper mainly describes new protocols for the formation of C(sp2 )-C(sp3 ), C(sp2 )-C(sp2 ), and C(sp2 )-C(sp) bonds via transition-metal-catalyzed cleavage of C(sp2 )-F bonds.
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Affiliation(s)
- Liyan Fu
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan
| | - Qiang Chen
- Graduate School of Natural Science and Technology, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan
| | - Yasushi Nishihara
- Research Institute for Interdisciplinary Science, Okayama University, 3-1-1 Tsushimanaka, Kita-ku, Okayama, 700-8530, Japan
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14
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Chu XQ, Zhi ML, Zhang SX, Wang YW, Rao W, Xu H, Shen ZL. Palladium-catalyzed defluorinative alkynylation of polyfluoroalkyl ketones with alkynes for the synthesis of fluorinated fused furans. Org Chem Front 2021. [DOI: 10.1039/d0qo01009j] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A Pd-catalyzed C–F bond alkynylation of polyfluoroalkyl ketones with terminal alkynes for the synthesis of fluoroalkylated fused furans was developed.
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Affiliation(s)
- Xue-Qiang Chu
- Technical Institute of Fluorochemistry (TIF)
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
| | - Man-Ling Zhi
- Technical Institute of Fluorochemistry (TIF)
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
| | - Si-Xuan Zhang
- Technical Institute of Fluorochemistry (TIF)
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
| | - Ya-Wen Wang
- Technical Institute of Fluorochemistry (TIF)
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
| | - Weidong Rao
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Haiyan Xu
- School of Environmental and Chemical Engineering
- Jiangsu University of Science and Technology
- Zhenjiang
- China
| | - Zhi-Liang Shen
- Technical Institute of Fluorochemistry (TIF)
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Nanjing Tech University
- Nanjing 211816
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15
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Chen J, Zhang X, Wu J, Wang R, Lei C, An Y. Facile one-pot synthesis of diarylacetylenes from arylaldehydes via an addition-double elimination process. Org Biomol Chem 2021; 19:4701-4705. [PMID: 33988213 DOI: 10.1039/d1ob00627d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A practical one-pot protocol has been developed to synthesize diarylacetylenes from arylaldehydes by treatment with 1-(arylmethyl)benzotriazoles and LiN(SiMe3)2. The reaction proceeded through imine formation, Mannich-type addition and double elimination to deliver products in up to 99% yields with broad substrate scope. In addition, gram-scale synthesis of 1-bromo-4-(phenylethynyl)benzene has been demonstrated.
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Affiliation(s)
- Jianyang Chen
- Chongqing Key Laboratory of Environmental Materials & Remediation Technologies, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, Yongchuan 402160, China.
| | - Xuan Zhang
- School of Intelligent Manufacturing Engineering, Chongqing University of Arts and Sciences, Yongchuan 402160, China
| | - Jiajun Wu
- Chongqing Key Laboratory of Environmental Materials & Remediation Technologies, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, Yongchuan 402160, China.
| | - Rui Wang
- Chongqing Key Laboratory of Environmental Materials & Remediation Technologies, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, Yongchuan 402160, China.
| | - Chunlin Lei
- Chongqing Key Laboratory of Environmental Materials & Remediation Technologies, College of Chemistry and Environmental Engineering, Chongqing University of Arts and Sciences, Yongchuan 402160, China.
| | - Yanan An
- College of Pharmacy, Chongqing University of Arts and Sciences, Yongchuan 402160, China
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16
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Wu C, McCollom SP, Zheng Z, Zhang J, Sha SC, Li M, Walsh PJ, Tomson NC. Aryl Fluoride Activation Through Palladium-Magnesium Bimetallic Cooperation: A Mechanistic and Computational Study. ACS Catal 2020; 10:7934-7944. [PMID: 34221636 DOI: 10.1021/acscatal.0c01301] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Herein is described a mechanistic study of a palladium-catalyzed cross-coupling of aryl Grignard reagents to fluoroarenes that proceeds via a low-energy heterobimetallic oxidative addition pathway. Traditional oxidative additions of aryl chlorides to Pd complexes are known to be orders of magnitude faster than with aryl fluorides, and many palladium catalysts do not activate aryl fluorides at all. The experimental and computational studies outlined herein, however, support the view that at elevated Grignard : ArX ratios (i.e. 2.5 : 1) a Pd-Mg heterobimetallic mechanism predominates, leading to a remarkable decrease in the energy required for Ar-F bond activation. The heterobimetallic transition state for C-X bond cleavage is proposed to involve simultaneous Pd backbonding to the arene and Lewis acid activation of the halide by Mg to create a low-energy transition state for oxidative addition. The insights gained from this computational study led to the development of a phosphine ligand that was shown to be similarly competent for Ar-F bond activation.
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Affiliation(s)
- Chen Wu
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Samuel P. McCollom
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Zhipeng Zheng
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Jiadi Zhang
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Sheng-Chun Sha
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Minyan Li
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Patrick J. Walsh
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
| | - Neil C. Tomson
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States
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17
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Helbert H, Visser P, Hermens JGH, Buter J, Feringa BL. Palladium-catalysed cross-coupling of lithium acetylides. Nat Catal 2020. [DOI: 10.1038/s41929-020-0485-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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18
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Ma Q, Wang Y, Tsui GC. Stereoselective Palladium‐Catalyzed C−F Bond Alkynylation of Tetrasubstituted
gem
‐Difluoroalkenes. Angew Chem Int Ed Engl 2020; 59:11293-11297. [DOI: 10.1002/anie.202002219] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 03/29/2020] [Indexed: 01/02/2023]
Affiliation(s)
- Qiao Ma
- Department of Chemistry The Chinese University of Hong Kong Shatin, New Territories Hong Kong SAR Hong Kong
| | - Yanhui Wang
- Department of Chemistry The Chinese University of Hong Kong Shatin, New Territories Hong Kong SAR Hong Kong
| | - Gavin Chit Tsui
- Department of Chemistry The Chinese University of Hong Kong Shatin, New Territories Hong Kong SAR Hong Kong
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19
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Ma Q, Wang Y, Tsui GC. Stereoselective Palladium‐Catalyzed C−F Bond Alkynylation of Tetrasubstituted
gem
‐Difluoroalkenes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202002219] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Qiao Ma
- Department of Chemistry The Chinese University of Hong Kong Shatin, New Territories Hong Kong SAR Hong Kong
| | - Yanhui Wang
- Department of Chemistry The Chinese University of Hong Kong Shatin, New Territories Hong Kong SAR Hong Kong
| | - Gavin Chit Tsui
- Department of Chemistry The Chinese University of Hong Kong Shatin, New Territories Hong Kong SAR Hong Kong
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Liu L, Yu WQ, Huang T, Chen T. Palladium-catalyzed alkynylation of aromatic amines via in situ formed trimethylammonium salts. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151647] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Chen Q, Fu L, Nishihara Y. Palladium/copper-cocatalyzed decarbonylative alkynylation of acyl fluorides with alkynylsilanes: synthesis of unsymmetrical diarylethynes. Chem Commun (Camb) 2020; 56:7977-7980. [DOI: 10.1039/d0cc03309j] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Alkynylation of acyl fluorides with alkynylsilanes via palladium/copper-cocatalysed carbon–fluorine bond cleavage and sequential decarbonylation, which provide an efficient route to various unsymmetrical diarylethynes, have been disclosed.
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Affiliation(s)
- Qiang Chen
- Graduate School of Natural Science and Technology
- Okayama University 3-1-1 Tsushimanaka, Kita-ku
- Okayama 700-8530
- Japan
| | - Liyan Fu
- Graduate School of Natural Science and Technology
- Okayama University 3-1-1 Tsushimanaka, Kita-ku
- Okayama 700-8530
- Japan
| | - Yasushi Nishihara
- Research Institute for Interdisciplinary Science
- Okayama University 3-1-1 Tsushimanaka, Kita-ku
- Okayama 700-8530
- Japan
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