1
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Zhi S, Ma X, Zhang W. Radical Cyclization-Initiated Difunctionalization Reactions of Alkenes and Alkynes. Molecules 2024; 29:2559. [PMID: 38893437 PMCID: PMC11173560 DOI: 10.3390/molecules29112559] [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: 04/12/2024] [Revised: 05/23/2024] [Accepted: 05/25/2024] [Indexed: 06/21/2024] Open
Abstract
Radical reactions are powerful in the synthesis of diverse molecular scaffolds bearing functional groups. In previous review articles, we have presented 1,2-difunctionalizations, remote 1,3-, 1,4-, 1,5-, 1,6- and 1,7-difunctionalizations, and addition followed by cyclization reactions. Presented in this paper is radical cyclization followed by the second functionalization reaction. The second functionalization could be realized by atom transfer reactions, radical or transition metal-assisted coupling reactions, and reactions with neutral molecules, cationic and anionic species.
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Affiliation(s)
- Sanjun Zhi
- Jiangsu Key Laboratory for the Chemistry of Low-Dimensional Materials, Huaiyin Normal University, 111 Changjiang West Road, Huaian 223300, China;
| | - Xiaoming Ma
- School of Pharmacy, Changzhou University, 1 Gehu Road, Changzhou 213164, China;
| | - Wei Zhang
- Department of Chemistry, University of Massachusetts Boston, 100 Morrissey Boulevard, Boston, MA 02125, USA
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2
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Zhang P, Li W, Yang S, Qu W, Wang L, Lin J, Gao X. Construction of Phosphorothiolated 2-Pyrrolidinones via Photoredox/Copper-Catalyzed Cascade Radical Cyclization/Phosphorothiolation. J Org Chem 2024; 89:4947-4957. [PMID: 38498700 DOI: 10.1021/acs.joc.4c00159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/20/2024]
Abstract
A photoredox/copper-catalyzed cascade radical cyclization/phosphorothiolation reaction of N-allylbromoacetamides and P(O)SH compounds has been established. A broad range of novel nonfluorine- or difluoro-substituted 2-pyrrolidinones bearing the C(sp3)-SP(O)(OR)2 moiety can be conveniently constructed in moderate to good yields under mild conditions. Importantly, most of the tested phosphorothiolated 2-pyrrolidinones showed potent inhibitory effects toward both AChE and BChE.
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Affiliation(s)
- Pengbo Zhang
- School of Public Health, Xinxiang Medical University, Xinxiang 453003, China
| | - Wenwu Li
- School of Public Health, Xinxiang Medical University, Xinxiang 453003, China
| | - Shuai Yang
- School of Public Health, Xinxiang Medical University, Xinxiang 453003, China
| | - Weilong Qu
- School of Public Health, Xinxiang Medical University, Xinxiang 453003, China
| | - Longyu Wang
- School of Public Health, Xinxiang Medical University, Xinxiang 453003, China
| | - Jinming Lin
- School of Public Health, Xinxiang Medical University, Xinxiang 453003, China
| | - Xia Gao
- School of Public Health, Xinxiang Medical University, Xinxiang 453003, China
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3
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Zhang Z, Zhou Y, Wang J, Zhang Y, Wang L, Liu J, Zhou C, Wang M, Li P. Radical relay cyclization/C-C bond formation of allyloxy-tethered aryl iodides with quinoxalin-2(1 H)-ones via polysulfide anion photocatalysis. Org Biomol Chem 2024; 22:1708-1713. [PMID: 38315045 DOI: 10.1039/d3ob01978k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2024]
Abstract
A visible-light-induced radical relay cyclization/C-C bond formation of quinoxalin-2(1H)-ones with allyloxy-tethered aryl iodides using polysulfide anions as a photocatalyst is described. This protocol allows efficient access to a variety of complicated molecules bearing both quinoxalin-2(1H)-one and 2,3-dihydrobenzofuran motifs in high yields under mild reaction conditions with a broad range of substrates.
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Affiliation(s)
- Zhongyi Zhang
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Zhejiang, 318000, P. R. China.
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
| | - Yaqin Zhou
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Zhejiang, 318000, P. R. China.
| | - Jiehui Wang
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Zhejiang, 318000, P. R. China.
| | - Yicheng Zhang
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
| | - Lei Wang
- Advanced Research Institute and School of Pharmaceutical Sciences, Taizhou University, Jiaojiang, Zhejiang, 318000, P. R. China.
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. 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, P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, P. R. China
| | - Jie Liu
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
| | - Chao Zhou
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
| | - Min Wang
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
- College of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, P. R. China
| | - Pinhua Li
- Key Laboratory of Green and Precise Synthetic Chemistry, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
- College of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, P. R. China
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4
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Jing Q, Qiao FC, Sun J, Wang JY, Zhou MD. Persulfate promoted carbamoylation of N-arylacrylamides and N-arylcinnamamides with 4-carbamoyl-Hantzsch esters. Org Biomol Chem 2023; 21:7530-7534. [PMID: 37674373 DOI: 10.1039/d3ob01240a] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
Carbamoyl-Hantzsch esters were used as carbamoyl radical precursors for oxidative carbamoylation of N-arylacrylamides and N-arylcinnamamides in the presence of inexpensive persulfates. This protocol can be applied to a broad range of substrates with various functional groups, providing a variety of 3,3-disubstituted oxindoles and 3,4-disubstituted dihydroquinolin-2(1H)-ones in moderate to good yields via an intermolecular addition/cyclization process.
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Affiliation(s)
- Qi Jing
- College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China.
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, China.
| | - Fu-Ci Qiao
- College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Jing Sun
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, China.
| | - Jing-Yun Wang
- College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China.
| | - Ming-Dong Zhou
- College of Chemical Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China.
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, China.
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5
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Li N, Wang Y, Gu S, Hu C, Yang Q, Jin Z, Ouyang WT, Qiao J, He WM. Visible-light-initiated external photocatalyst-free synthesis of α,α-difluoro-β-ketoamides from 4-aminocoumarins. Org Biomol Chem 2023; 21:370-374. [PMID: 36515252 DOI: 10.1039/d2ob01914k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A concise and efficient ring-opening difluorination strategy was developed for the synthesis of highly functionalized hydroxy-containing α,α-difluoro-β-ketoamides from the one-pot multicomponent reaction of 4-aminocoumarins, NFSI, and water in dimethyl carbonate (DMC) as a green solvent. The reactions were smoothly achieved under visible light irradiation in air at room temperature without the addition of any other external photocatalysts. With this protocol, various α,α-difluoro-β-ketoamides were successfully synthesized under mild conditions (25 examples, 73-91% yields). This transition-metal-free synthetic procedure shows good functional group compatibility and attractive practical potential for large-scale synthesis.
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Affiliation(s)
- Ningbo Li
- School of Basic Medical Sciences, Shanxi Medical University, Taiyuan, 030001, China
| | - Yuxin Wang
- School of Basic Medical Sciences, Shanxi Medical University, Taiyuan, 030001, China
| | - Shuo Gu
- School of Pharmaceutical Sciences, Shanxi Medical University, Taiyuan, 030001, China
| | - Chuqian Hu
- School of Basic Medical Sciences, Shanxi Medical University, Taiyuan, 030001, China
| | - Qian Yang
- School of Basic Medical Sciences, Shanxi Medical University, Taiyuan, 030001, China
| | - Zhaohui Jin
- School of Basic Medical Sciences, Shanxi Medical University, Taiyuan, 030001, China
| | - Wen-Tao Ouyang
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, China.
| | - Jie Qiao
- School of Basic Medical Sciences, Shanxi Medical University, Taiyuan, 030001, China
| | - Wei-Min He
- School of Chemistry and Chemical Engineering, University of South China, Hengyang, 421001, China.
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6
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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: 5] [Impact Index Per Article: 2.5] [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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7
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Ma C, Meng H, Li J, Yang X, Jiang Y, Yu B. Photocatalytic
Transition‐Metal‐Free
Direct
3‐Acetalation
of Quinoxaline‐2(
1
H
)‐ones. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202200386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Chunhua Ma
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical, Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials, School of Chemistry and Chemical Engineering Henan Normal University Xinxiang 453007 China
| | - Hui Meng
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical, Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials, School of Chemistry and Chemical Engineering Henan Normal University Xinxiang 453007 China
| | - Jing Li
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical, Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials, School of Chemistry and Chemical Engineering Henan Normal University Xinxiang 453007 China
| | - Xianguang Yang
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical, Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials, School of Chemistry and Chemical Engineering Henan Normal University Xinxiang 453007 China
| | - Yuqin Jiang
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical, Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials, School of Chemistry and Chemical Engineering Henan Normal University Xinxiang 453007 China
| | - Bing Yu
- Green Catalysis Centre, College of Chemistry Zhengzhou University. Zhengzhou 450001 China
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8
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yao Z, Yang J, Luo ZL, Ye J, Han J, zhang X, Xu L, Wang P, Shi Q. Visible‐Light Photoredox‐Catalyzed Tandem One‐Pot Construction of C4‐Difluoroalkylated Phthalazin‐1(2H)‐ones. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- zhen yao
- Renmin University of China CHINA
| | | | | | | | | | | | - Lijin Xu
- Renmin University of China CHINA
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9
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Yuan YR, Li L, Bu X, Wang X, Sun R, Zhou MD, Wang H. Visible‐Light Photoredox‐Catalyzed Three‐Component Difluoromethylative Heteroarylation of Unactivated Alkenes. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200139] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ya-Ru Yuan
- Liaoning petrochemical University School of Petrochemical Engineering CHINA
| | - Lei Li
- Liaoning petrochemical University School of Petrochemical Engineering CHINA
| | - Xiubin Bu
- Shenyang Normal University Institute of Catalysis for Energy and Environment, College of Chemistry & Chemical Engineering CHINA
| | - Xin Wang
- Liaoning petrochemical University School of Petrochemical Engineering CHINA
| | - Ran Sun
- Liaoning petrochemical University School of Petrochemical Engineering CHINA
| | - Ming-Dong Zhou
- Liaoning petrochemical University School of Petrochemical Engineering CHINA
| | - He Wang
- Liaoning Shihua University School of Chemistry and Materials Science Dandong road 1, Wanghua District 113001 Fushun CHINA
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10
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Ying J, Liu T, Liu Y, Wan JP. Base-Promoted Annulative Difluoromethylenation of Enaminones with BrCF 2CO 2Et toward 2,2-Difluorinated 2,3-Dihydrofurans. Org Lett 2022; 24:2404-2408. [PMID: 35302379 DOI: 10.1021/acs.orglett.2c00671] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A practical method for the synthesis of 2,2-difluorinated 2,3-dihydrofurans has been established via the [4 + 1] annulation of enaminones and BrCF2CO2Et with Na2CO3 promotion. This new protocol does not employ any transition metal reagent and enables the annulative difluoromethylation by the partial cleavage of the C═C double bond. In addition, the further treatment with hydrochloric acid in one pot leads to β-keto enoic acids (4-oxo-2-butenoic acids) via a formal enaminone C-N carboxylation.
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Affiliation(s)
- Jinbiao Ying
- Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Ting Liu
- Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Yunyun Liu
- Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Jie-Ping Wan
- Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P. R. China
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