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Xie S, Fu L, Ding Y, Wang Q, He C, Xu W, Wang Q, Zhong Y, Fan X, Yang M. Electrochemical C-H Mono-/Multi-Bromination Regulation of N-Sulfonylanilines on a Cost-Effective Carbon Fiber Electrode and Its Prospective Electroactive Molecule Screening. J Org Chem 2024; 89:6759-6769. [PMID: 38683949 DOI: 10.1021/acs.joc.4c00080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2024]
Abstract
Electrochemical C-H mono/multi-bromination regulation of N-sulfonylanilines on the cost-effective CF electrode is described. This reaction proceeds smoothly under mild conditions with a broad substrate scope, affording diverse mono/multi-brominated anilines in moderate to good yields. Mechanism study reveals that this transformation involves anodic oxidation, aromatic electrophilic substitution, and deprotonation. Preliminary electroactive molecule screening results in its prospective application in electroactive MBs for electrochemical biosensors.
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Affiliation(s)
- Shuchun Xie
- School of Pharmacy, Key Laboratory for Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, China
| | - Li Fu
- School of Pharmacy, Key Laboratory for Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, China
| | - Yechun Ding
- School of Pharmacy, Key Laboratory for Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, China
| | - Qi Wang
- School of Pharmacy, Key Laboratory for Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, China
| | - Chen He
- School of Pharmacy, Key Laboratory for Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, China
| | - Wenjun Xu
- School of Pharmacy, Key Laboratory for Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, China
| | - Qing Wang
- School of Pharmacy, Key Laboratory for Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, China
| | - Yingfang Zhong
- Academic Affairs Office, Gannan Medical University, Ganzhou 341000, China
| | - Xiaona Fan
- School of Pharmacy, Key Laboratory for Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, China
| | - Min Yang
- School of Pharmacy, Key Laboratory for Tissue Engineering of Jiangxi Province, Gannan Medical University, Ganzhou 341000, China
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Zhong LJ, Chen H, Shang X, Xiong BQ, Tang KW, Liu Y. Oxidant-Assisted Sulfonylation/Cyclization Cascade Synthesis of Alkylsulfonylated Oxindoles via the Insertion of SO 2. J Org Chem 2024; 89:5409-5422. [PMID: 38563439 DOI: 10.1021/acs.joc.3c02860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
An oxidant-assisted tandem sulfonylation/cyclization of electron-deficient alkenes with 4-alkyl-substituted Hantzsch esters and Na2S2O5 for the preparation of 3-alkylsulfonylated oxindoles under mild conditions in the absence of a photocatalyst and transition metal catalyst is established. The mechanism studies show that the alkyl radicals, which come from the cleavage of the C-C bond in 4-substituted Hantzsch esters under oxidant conditions, subsequently undergo the in situ insertion of sulfur dioxide to generate the crucial alkylsulfonyl radical intermediates. This three-component reaction provides an efficient and facile route for the construction of alkylsulfonylated oxindoles and avoids the use of highly toxic alkylsulfonyl chlorides or alkylsulfonyl hydrazines as alkylsulfonyl sources.
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Affiliation(s)
- Long-Jin Zhong
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Hui Chen
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Xuan Shang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Bi-Quan Xiong
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Ke-Wen Tang
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Yu Liu
- Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
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3
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He C, Wang Q, Zhou X, Yi L, Zhang Z, Zhang C, Xie H, Huang Q, Qiu G, Yang M. Photocatalytic Cyclization Cascades by Radical Relay toward Pyrrolo[1,2- a]indoles: Synthesis, Mechanism, and Application. J Org Chem 2024; 89:3509-3524. [PMID: 38362658 DOI: 10.1021/acs.joc.3c02959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
A photocatalytic annulation cascade of unactivated N-alkene-linked indoles with Langlois' reagent by a radical relay is developed at room temperature under blue LED irradiation. The reaction afforded a series of tri/difluoromethylated pyrrolo[1,2-a]indoles in moderate to good yields. The DFT study suggests that the reaction is ascribed to a rhodamine 6G-induced cyclization cascade involving vinyl addition-radical relay and hydrogen-atom-abstraction (HAA) processes, and interestingly, pyrrolo[1,2-a]indoles are applied as fluorescent dyes into the fluorescence spectrum and live-cell imaging. This paper represents an initial example on photocatalytic cyclization cascades by radical relay and the HAA process.
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Affiliation(s)
- Chen He
- School of Pharmacy, Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Key Laboratory of Biomedical Sensors of Ganzhou, Gannan Medical University, Ganzhou, Jiangxi Province 341000, China
| | - Qi Wang
- School of Pharmacy, Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Key Laboratory of Biomedical Sensors of Ganzhou, Gannan Medical University, Ganzhou, Jiangxi Province 341000, China
| | - Xiaoyang Zhou
- School of Pharmacy, Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Key Laboratory of Biomedical Sensors of Ganzhou, Gannan Medical University, Ganzhou, Jiangxi Province 341000, China
| | - Lin Yi
- School of Pharmacy, Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Key Laboratory of Biomedical Sensors of Ganzhou, Gannan Medical University, Ganzhou, Jiangxi Province 341000, China
| | - Zhiqiang Zhang
- School of Pharmacy, Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Key Laboratory of Biomedical Sensors of Ganzhou, Gannan Medical University, Ganzhou, Jiangxi Province 341000, China
| | - Chun Zhang
- School of Pharmaceutical and Materials Engineering, Taizhou University, Taizhou, Zhejiang Province 318000, China
| | - Haijiao Xie
- Hangzhou Yanqu Information Technology Co., Ltd., Y2, second Floor, Building 2, Xixi Legu Creative Pioneering Park, No. 712 Wen'er West Road, Xihu District, Hangzhou City, Zhejiang Province 310003, China
| | - Qitong Huang
- School of Pharmacy, Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Key Laboratory of Biomedical Sensors of Ganzhou, Gannan Medical University, Ganzhou, Jiangxi Province 341000, China
| | - Guanyinsheng Qiu
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001 Zhejiang, China
| | - Min Yang
- School of Pharmacy, Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Key Laboratory of Biomedical Sensors of Ganzhou, Gannan Medical University, Ganzhou, Jiangxi Province 341000, China
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4
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Fang Y, Ren S, He C, Han H, Liao F, Liu JB, Yang M. Selective halocyclization and iodosulfonylation of N-benzothiazol2-yl alkynamides under mild conditions. Org Biomol Chem 2022; 20:6550-6553. [DOI: 10.1039/d2ob01165d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An effective synthetic entry to pyrimidobenzothiazoles via 6-endo-dig halocyclization of N-benzothiazol-2-yl alkynamides was developed under mild conditions with a broad substrate scope. Several multisubstituted α,β-enones were synthesized by using the...
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He C, Zhong Y, Han H, Wang Q, Xu L, Zhang T, Hu Y, Huang Q, Liu J, Yang M. Photoinduced decarboxylative 1,6-addition of para-quinone methides with α-keto acids: an eco-friendly approach to α,α′-diarylated ketones. NEW J CHEM 2022. [DOI: 10.1039/d2nj04562a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The photoinduced decarboxylative 1,6-addition of para-quinone methides with α-keto acids in an eco-friendly approach to α,α′-diarylated ketones is developed.
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Affiliation(s)
- Chen He
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Oil-tea in Medical Health Care and Functional Product Development Engineering Research Center in Jiangxi, Key Laboratory of Biomedical Sensors of Ganzhou, School of Pharmacy, Gannan Medical University, Ganzhou, 341000, China
| | - Yingfang Zhong
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Oil-tea in Medical Health Care and Functional Product Development Engineering Research Center in Jiangxi, Key Laboratory of Biomedical Sensors of Ganzhou, School of Pharmacy, Gannan Medical University, Ganzhou, 341000, China
| | - Huiqi Han
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Oil-tea in Medical Health Care and Functional Product Development Engineering Research Center in Jiangxi, Key Laboratory of Biomedical Sensors of Ganzhou, School of Pharmacy, Gannan Medical University, Ganzhou, 341000, China
| | - Qi Wang
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Oil-tea in Medical Health Care and Functional Product Development Engineering Research Center in Jiangxi, Key Laboratory of Biomedical Sensors of Ganzhou, School of Pharmacy, Gannan Medical University, Ganzhou, 341000, China
| | - Lijing Xu
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Oil-tea in Medical Health Care and Functional Product Development Engineering Research Center in Jiangxi, Key Laboratory of Biomedical Sensors of Ganzhou, School of Pharmacy, Gannan Medical University, Ganzhou, 341000, China
| | - Ting Zhang
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Oil-tea in Medical Health Care and Functional Product Development Engineering Research Center in Jiangxi, Key Laboratory of Biomedical Sensors of Ganzhou, School of Pharmacy, Gannan Medical University, Ganzhou, 341000, China
| | - Yaqiong Hu
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Oil-tea in Medical Health Care and Functional Product Development Engineering Research Center in Jiangxi, Key Laboratory of Biomedical Sensors of Ganzhou, School of Pharmacy, Gannan Medical University, Ganzhou, 341000, China
| | - Qitong Huang
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Oil-tea in Medical Health Care and Functional Product Development Engineering Research Center in Jiangxi, Key Laboratory of Biomedical Sensors of Ganzhou, School of Pharmacy, Gannan Medical University, Ganzhou, 341000, China
| | - Jun Liu
- Department of Neurosurgery, the Affiliated Ganzhou Hospital of Nanchang University, Ganzhou, Jiangxi Province, 341000, China
| | - Min Yang
- Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Oil-tea in Medical Health Care and Functional Product Development Engineering Research Center in Jiangxi, Key Laboratory of Biomedical Sensors of Ganzhou, School of Pharmacy, Gannan Medical University, Ganzhou, 341000, China
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Qin B, Huang S, Chen JQ, Xiao W, Wu J. Metal-free synthesis of sulfonylated indolo[2,1-a]isoquinolines from sulfur dioxide. Org Chem Front 2022. [DOI: 10.1039/d2qo00487a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Access to sulfonylated indolo[2,1-a]isoquinolines through an efficient three-component reaction of 2-aryl-N-acryloyl indoles, sulfur dioxide and aryldiazonium tetrafluoroborates is developed. This transformation is performed under metal-free and mild conditions by using...
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