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Li X, Majumder S, Tang X, Dolbier WR. Zinc 1,1,2,2-Tetrafluoroethanesulfinate: A Synthetically Useful Oxidative and Photoredox Source of the 1,1,2,2-Tetrafluoroethyl Radical. J Org Chem 2024; 89:5485-5490. [PMID: 38554099 DOI: 10.1021/acs.joc.3c02948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/01/2024]
Abstract
1,1,2,2-Tetrafluoroethyl-containing molecules are of potential importance in drug discovery, but the efficient synthesis of such compounds is still relatively unexplored due to the lack of readily available reagents for the incorporation of the HCF2CF2 group. Herein, we introduce a new reagent, zinc 1,1,2,2-tetrafluoroethanesulfinate, which can be useful for the oxidative tetrafluoroethylation of arylboronic acids and heteroarenes as well as for a novel photoredox, three component hydro-tetrafluoroethylation of two alkenes of complementary reactivity.
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Affiliation(s)
- Xinjin Li
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
- College of Chemistry and Chemical Engineering, Shandong University of Technology, Zibo, Shandong 255000, China
| | - Satyajit Majumder
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
| | - Xiaojun Tang
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
- Department of Chemistry, Shanghai University, Shanghai 200444, China
| | - William R Dolbier
- Department of Chemistry, University of Florida, Gainesville, Florida 32611, United States
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2
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Lai C, Tang Z, Liu Z, Luo P, Zhang W, Zhang T, Zhang W, Dong Z, Liu X, Yang X, Wang F. Probing the functional hotspots inside protein hydrophobic pockets by in situ photochemical trifluoromethylation and mass spectrometry. Chem Sci 2024; 15:2545-2557. [PMID: 38362424 PMCID: PMC10866368 DOI: 10.1039/d3sc05106d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 01/11/2024] [Indexed: 02/17/2024] Open
Abstract
Due to the complex high-order structures and interactions of proteins within an aqueous solution, a majority of chemical functionalizations happen on the hydrophilic sites of protein external surfaces which are naturally exposed to the solution. However, the hydrophobic pockets inside proteins are crucial for ligand binding and function as catalytic centers and transporting tunnels. Herein, we describe a reagent pre-organization and in situ photochemical trifluoromethylation strategy to profile the functional sites inside the hydrophobic pockets of native proteins. Unbiased mass spectrometry profiling was applied for the characterization of trifluoromethylated sites with high sensitivity. Native proteins including myoglobin, trypsin, haloalkane dehalogenase, and human serum albumin have been engaged in this mild photochemical process and substantial hydrophobic site-specific and structure-selective trifluoromethylation substitutes are obtained without significant interference to their bioactivity and structures. Sodium triflinate is the only reagent required to functionalize the unprotected proteins with wide pH-range tolerance and high biocompatibility. This "in-pocket" activation model provides a general strategy to modify the potential binding pockets and gain essential structural insights into the functional hotspots inside protein hydrophobic pockets.
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Affiliation(s)
- Can Lai
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Zhiyao Tang
- Department of Chemistry, College of Science, Southern University of Science and Technology Shenzhen 518055 China
| | - Zheyi Liu
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
| | - Pan Luo
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
- Institute of Advanced Science Facilities Shenzhen 518107 China
| | - Wenxiang Zhang
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
| | - Tingting Zhang
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Wenhao Zhang
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
- University of Chinese Academy of Sciences Beijing 100049 China
| | - Zhe Dong
- Department of Chemistry, College of Science, Southern University of Science and Technology Shenzhen 518055 China
| | - Xinyuan Liu
- Department of Chemistry, College of Science, Southern University of Science and Technology Shenzhen 518055 China
| | - Xueming Yang
- Department of Chemistry, College of Science, Southern University of Science and Technology Shenzhen 518055 China
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
- Institute of Advanced Science Facilities Shenzhen 518107 China
| | - Fangjun Wang
- CAS Key Laboratory of Separation Sciences for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian 116023 China
- University of Chinese Academy of Sciences Beijing 100049 China
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3
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Cho H, Jang S, Lee K, Cha D, Min SJ. Visible-Light-Induced DDQ-Catalyzed Fluorocarbamoylation Using CF 3SO 2Na and Oxygen. Org Lett 2023. [PMID: 37987781 DOI: 10.1021/acs.orglett.3c03335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
The synthesis of carbamoyl fluorides via visible-light induced DDQ catalysis of secondary amines is described. This protocol employs sodium trifluorosulfinate and molecular oxygen for the in situ generation of carbonyl difluoride, which is reacted with amines to afford the corresponding carbamoyl fluorides efficiently. Moreover, carbamoyl fluorides are easily transformed to synthetically useful carbonyl compounds under mild reaction conditions.
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Affiliation(s)
- Huijeong Cho
- Department of Applied Chemistry, Hanyang University ERICA, Ansan, Gyeonggi-do 15588, Republic of Korea
- Center for Bionano Intelligence Education and Research, Hanyang University ERICA, Ansan, Gyeonggi-do 15588, Republic of Korea
| | - Seonga Jang
- Department of Applied Chemistry, Hanyang University ERICA, Ansan, Gyeonggi-do 15588, Republic of Korea
- Center for Bionano Intelligence Education and Research, Hanyang University ERICA, Ansan, Gyeonggi-do 15588, Republic of Korea
| | - Kangjoo Lee
- Department of Applied Chemistry, Hanyang University ERICA, Ansan, Gyeonggi-do 15588, Republic of Korea
- Center for Bionano Intelligence Education and Research, Hanyang University ERICA, Ansan, Gyeonggi-do 15588, Republic of Korea
| | - Dohoon Cha
- Department of Applied Chemistry, Hanyang University ERICA, Ansan, Gyeonggi-do 15588, Republic of Korea
- Center for Bionano Intelligence Education and Research, Hanyang University ERICA, Ansan, Gyeonggi-do 15588, Republic of Korea
| | - Sun-Joon Min
- Department of Applied Chemistry, Hanyang University ERICA, Ansan, Gyeonggi-do 15588, Republic of Korea
- Center for Bionano Intelligence Education and Research, Hanyang University ERICA, Ansan, Gyeonggi-do 15588, Republic of Korea
- Department of Chemical & Molecular Engineering, Hanyang University ERICA, Ansan, Gyeonggi-do 15588, Republic of Korea
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Dongxu Z. Trifluoromethylated hydrazones and acylhydrazones as potent nitrogen-containing fluorinated building blocks. Beilstein J Org Chem 2023; 19:1741-1754. [PMID: 38025086 PMCID: PMC10667715 DOI: 10.3762/bjoc.19.127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2023] [Accepted: 11/03/2023] [Indexed: 12/01/2023] Open
Abstract
Nitrogen-containing organofluorine derivatives, which are prepared using fluorinated building blocks, are among the most important active fragments in various pharmaceutical and agrochemical products. This review focuses on the reactivity, synthesis, and applications of fluoromethylated hydrazones and acylhydrazones. It summarizes recent methodologies that have been used for the synthesis of various nitrogen-containing organofluorine compounds.
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Affiliation(s)
- Zhang Dongxu
- Department of Fire Protection Engineering, China Fire and Rescue Institute, Beijing 102202, P. R. of China
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5
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Tang Y, Huang M, Jiang L, Zhang X, Zheng S, Yang Y, Chen XY. Visible-Light-Irradiated Multicomponent Reactions of Aliphatic Amines, Propiolate Acid Esters, and CF 3 SO 2 Na for Accessing β-CF 3 Enamines. Chemistry 2023; 29:e202302249. [PMID: 37572319 DOI: 10.1002/chem.202302249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 08/10/2023] [Accepted: 08/10/2023] [Indexed: 08/14/2023]
Abstract
A novel one-pot two-step multicomponent reaction has been achieved for the preparation of β-CF3 enamines by using different aliphatic amines, propiolates, and CF3 SO2 Na as starting material. In this protocol, various aliphatic amines including primary amines, cyclic or acyclic secondary amines were demonstrated to be good coupling partners, and different β-CF3 enamines were obtained in moderate to good yields. Among them, the primary aliphatic amines only gave pure (E)-β-CF3 enamines as products. The synthetic utility of the MCRs strategy was further demonstrated by mild conditions, gram-scale synthesis and natural sunlight-induced protocol. Preliminary mechanistic studies suggest that this trifluoromethylation of C(sp2 )-H involves radical process.
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Affiliation(s)
- Yisong Tang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, P. R. China
| | - Mingyang Huang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, P. R. China
| | - Liang Jiang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, P. R. China
| | - Xiaotong Zhang
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, P. R. China
| | - Shaojun Zheng
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, P. R. China
| | - Yong Yang
- College of Mechanical Engineering, Suzhou University of Science and Technology, Suzhou, 320500, P. R. China
| | - Xiao Yun Chen
- School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang, 212003, P. R. China
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Shen J, Li L, Xu J, Shen C, Zhang P. Recent advances in the application of Langlois' reagent in olefin difunctionalization. Org Biomol Chem 2023; 21:2046-2058. [PMID: 36448510 DOI: 10.1039/d2ob01875f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
In this review, we summarise the recent applications of Langlois' reagent in the radical-mediated difunctionalization of alkenes. Among the various trifluoromethylation reagents, Langlois' reagent is an exceptional compound, and many important organic transformations have been realized by employing such reagents. Various organic transformations of Langlois' reagent, especially in radical chemistry, have been developed in recent years. This review describes several key activation methods for Langlois' reagent in the difunctionalization of alkenes by showcasing selected cornerstone research areas and related mechanisms to stimulate the interest of readers in promoting the wider development and application of Langlois' reagent.
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Affiliation(s)
- Jiabin Shen
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China. .,College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, People's Republic of China.
| | - Lin Li
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, People's Republic of China.
| | - Jun Xu
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, People's Republic of China.
| | - Chao Shen
- Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province, College of Biology and Environmental Engineering, Zhejiang Shuren University, Hangzhou 310015, China.
| | - Pengfei Zhang
- College of Material, Chemistry and Chemical Engineering, Key Laboratory of Organosilicon Chemistry and Material Technology, Ministry of Education, Hangzhou Normal University, Hangzhou, 311121, Zhejiang, People's Republic of China.
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Cui J, Tong Y, Li Y. Synthesis of Trifluoromethylated γ-Lactams through Radical Cascades of N-Cyano Alkenes with CF 3SO 2Na. J Org Chem 2022; 87:16090-16098. [PMID: 36370090 DOI: 10.1021/acs.joc.2c01775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
We report herein a facile strategy to synthesize trifluoromethylated γ-lactams through trifluoromethylcarbonylation of N-cyano alkenes using readily available CF3SO2Na as the CF3 radical source. A range of trifluoromethyl-containing γ-lactams was obtained in good yields. This transition-metal-free protocol is demonstrated with mild conditions, broad substrate scope, good functional group tolerance, convenient reagents, and an easy-to-handle operating system.
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Affiliation(s)
- Jianchao Cui
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University), College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Ye Tong
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University), College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Yi Li
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University), College of Chemistry, Fuzhou University, Fuzhou 350108, China
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Tran C, Hamze A. Recent Developments in the Photochemical Synthesis of Functionalized Imidazopyridines. Molecules 2022; 27:molecules27113461. [PMID: 35684399 PMCID: PMC9182178 DOI: 10.3390/molecules27113461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 05/20/2022] [Accepted: 05/25/2022] [Indexed: 12/04/2022] Open
Abstract
Imidazopyridines constitute one of the most important scaffolds in medicinal chemistry, as their skeleton could be found in a myriad of biologically active molecules. Although numerous strategies were elaborated for imidazopyridine preparation in the 2010s, novel eco-compatible synthetic approaches have emerged, conscious of climate change concerns. In this framework, photochemical methods have been promoted to conceive this heterocyclic motif over the last decade. This review covers the recently published works on synthesizing highly functionalized imidazopyridines by light induction.
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