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Lin SN, Deng Y, Zhong H, Mao LL, Ji CB, Zhu XH, Zhang X, Yang BM. Visible Light-Induced Radical Cascade Difluoromethylation/Cyclization of Unactivated Alkenes: Access to CF 2H-Substituted Polycyclic Imidazoles. ACS OMEGA 2024; 9:28129-28143. [PMID: 38973879 PMCID: PMC11223139 DOI: 10.1021/acsomega.4c01177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 06/07/2024] [Accepted: 06/11/2024] [Indexed: 07/09/2024]
Abstract
An efficient and mild protocol for the visible light-induced radical cascade difluoromethylation/cyclization of imidazoles with unactivated alkenes using easily accessible and bench-stable difluoromethyltriphenylphosphonium bromide as the precursor of the -CF2H group has been developed to afford CF2H-substituted polycyclic imidazoles in moderate to good yields. This strategy, along with the construction of Csp3-CF2H/C-C bonds, is distinguished by mild conditions, no requirement of additives, simple operation, and wide substrate scope. In addition, the mechanistic experiments have indicated that the difluoromethyl radical pathway is essential for the methodology.
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Affiliation(s)
- Sheng-Nan Lin
- College
of Chemistry and Environment Science, Shangrao
Normal University, Shangrao 334001, China
| | - Yuanyuan Deng
- College
of Chemistry and Environment Science, Shangrao
Normal University, Shangrao 334001, China
| | - Hanxun Zhong
- College
of Chemistry and Environment Science, Shangrao
Normal University, Shangrao 334001, China
| | - Liu-Liang Mao
- College
of Chemistry and Environment Science, Shangrao
Normal University, Shangrao 334001, China
| | - Cong-Bin Ji
- College
of Chemistry and Environment Science, Shangrao
Normal University, Shangrao 334001, China
| | - Xian-Hong Zhu
- College
of Chemistry and Environment Science, Shangrao
Normal University, Shangrao 334001, China
| | - Xiaolan Zhang
- College
of Chemistry and Environment Science, Shangrao
Normal University, Shangrao 334001, China
| | - Bin-Miao Yang
- Joint
School of National University of Singapore and Tianjin University, Fuzhou 350207, China
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Teng Y, Fang T, Lin Z, Qin L, Jiang M, Wu W, You Y, Weng Z. Ring-expansion reaction for the synthesis of 2-(trifluoromethyl)oxazoles and 3-(trifluoromethyl)-1,2,4-triazines. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Liao H, Huang Z, Zhu Q. A simple iodine-DMSO-promoted multicomponent reaction for the synthesis of 2,4-disubstituted dihydrotriazole-3-ones. Org Biomol Chem 2022; 20:3721-3725. [PMID: 35442256 DOI: 10.1039/d2ob00352j] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A series of 2,4-disubstituted 1,2,4-triazole-3-ones 4 were prepared via an iodine-DMSO-promoted three-component reaction of formaldehyde, amines and hydrazines in moderate yields.
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Affiliation(s)
- Hui Liao
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, China.
| | - Zesheng Huang
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, China.
| | - Qiuhua Zhu
- Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou 510515, China.
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You C, Huang Y, You Y, Weng Z. Copper-mediated three-component synthesis of 2-trifluoromethyl benzimidazoles. Org Chem Front 2022. [DOI: 10.1039/d2qo00285j] [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
A copper-mediated three-component reaction of o-iodoanilines, anilines, and ethyl trifluoropyruvate is reported. The transformation allows diverse scopes on both o-iodoanilines and anilines delivering various 2-trifluoromethylbenzimidazole products in moderate to good...
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Huang M, Duan WG, Lin GS, Li BY. Synthesis, Antifungal Activity, 3D-QSAR, and Molecular Docking Study of Novel Menthol-Derived 1,2,4-Triazole-thioether Compounds. Molecules 2021; 26:6948. [PMID: 34834038 PMCID: PMC8618492 DOI: 10.3390/molecules26226948] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2021] [Revised: 11/07/2021] [Accepted: 11/16/2021] [Indexed: 12/04/2022] Open
Abstract
A series of novel menthol derivatives containing 1,2,4-triazole-thioether moiety were designed, synthesized, characterized structurally, and evaluated biologically to explore more potent natural product-based antifungal agents. The bioassay results revealed that at 50 μg/mL, some of the target compounds exhibited good inhibitory activity against the tested fungi, especially against Physalospora piricola. Compounds 5b (R = o-CH3 Ph), 5i (R = o-Cl Ph), 5v (R = m,p-OCH3 Ph) and 5x (R = α-furyl) had inhibition rates of 93.3%, 79.4%, and 79.4%, respectively, against P. piricola, much better than that of the positive control chlorothalonil. Compounds 5v (R = m,p-OCH3 Ph) and 5g (R = o-Cl Ph) held inhibition rates of 82.4% and 86.5% against Cercospora arachidicola and Gibberella zeae, respectively, much better than that of the commercial fungicide chlorothalonil. Compound 5b (R = o-CH3 Ph) displayed antifungal activity of 90.5% and 83.8%, respectively, against Colleterichum orbicalare and Fusarium oxysporum f. sp. cucumerinum. Compounds 5m (R = o-I Ph) had inhibition rates of 88.6%, 80.0%, and 88.0%, respectively, against F. oxysporum f. sp. cucumerinu, Bipolaris maydis and C. orbiculare. Furthermore, compound 5b (R = o-CH3 Ph) showed the best and broad-spectrum antifungal activity against all the tested fungi. To design more effective antifungal compounds against P. piricola, 3D-QSAR analysis was performed using the CoMFA method, and a reasonable 3D-QSAR model (r2 = 0.991, q2 = 0.514) was established. The simulative binding pattern of the target compounds with cytochrome P450 14α-sterol demethylase (CYP51) was investigated by molecular docking.
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Affiliation(s)
- Mei Huang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; (M.H.); (B.-Y.L.)
- Guangxi Research Institute of Chemical Industry Co., Ltd., Nanning 530001, China
| | - Wen-Gui Duan
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; (M.H.); (B.-Y.L.)
| | - Gui-Shan Lin
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; (M.H.); (B.-Y.L.)
| | - Bao-Yu Li
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; (M.H.); (B.-Y.L.)
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7
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Chen H, Wen S, Cui Y, Lin L, Zhang H, Fang Z, You Y, Weng Z. A method for synthesis of polysubstituted 4-difluoromethyl and perfluoroalkyl pyrazoles. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132062] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Fang Z, Yin H, Lin L, Wen S, Xie L, Huang Y, Weng Z. Collaborative Activation of Trifluoroacetyl Diazoester by a Lewis Acid and Base for the Synthesis of Polysubstituted 4-Trifluoromethylpyrazoles. J Org Chem 2020; 85:8714-8722. [DOI: 10.1021/acs.joc.0c00737] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Zheng Fang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fujian 350108, China
| | - Hongshan Yin
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fujian 350108, China
| | - Lu Lin
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fujian 350108, China
| | - Shunli Wen
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fujian 350108, China
| | - Lili Xie
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fujian 350108, China
| | - Yangjie Huang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fujian 350108, China
| | - Zhiqiang Weng
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fujian 350108, China
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Wu W, Chen Q, Tian Y, Xu Y, Huang Y, You Y, Weng Z. Synthesis of polysubstituted 5-trifluoromethyl isoxazoles via denitrogenative cyclization of vinyl azides with trifluoroacetic anhydride. Org Chem Front 2020. [DOI: 10.1039/d0qo00243g] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A general method for the synthesis of 5-(trifluoromethyl)isoxazoles by denitrogenative cyclization of vinyl azides with trifluoroacetic anhydride has been developed.
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Affiliation(s)
- Wei Wu
- State Key Laboratory of Photocatalysis on Energy and Environment
- and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- Fuzhou
| | - Qiaoling Chen
- State Key Laboratory of Photocatalysis on Energy and Environment
- and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- Fuzhou
| | - Yishi Tian
- State Key Laboratory of Photocatalysis on Energy and Environment
- and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- Fuzhou
| | - Yihui Xu
- State Key Laboratory of Photocatalysis on Energy and Environment
- and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- Fuzhou
| | - Yangjie Huang
- State Key Laboratory of Photocatalysis on Energy and Environment
- and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- Fuzhou
| | - Yi You
- State Key Laboratory of Photocatalysis on Energy and Environment
- and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- Fuzhou
| | - Zhiqiang Weng
- State Key Laboratory of Photocatalysis on Energy and Environment
- and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- Fuzhou
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11
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Xu Y, Chen Q, Tian Y, Wu W, You Y, Weng Z. Silver-catalyzed synthesis of 5-aryl-3-trifluoromethyl pyrazoles. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2019.151455] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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