1
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Gao Q, Sun Z, Wu M, Guo Y, Han X, Yan J, Ha MN, Le QM, Xu Y. Di- tert-butyl peroxide as an effective two-carbon unit in oxidative radical cyclization toward 7-methylazolo[1,5- a]pyrimidines. Org Chem Front 2022. [DOI: 10.1039/d2qo00381c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
An unexpected oxidative radical cyclization with DTBP as the C2 cyclic unit enables the assembly of privileged 7-methylazolo[1,5-a]pyrimidines.
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Affiliation(s)
- Qinghe Gao
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P. R. China
| | - Zhenhua Sun
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P. R. China
| | - Manman Wu
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P. R. China
| | - Yimei Guo
- School of Pharmacy, Xinxiang Medical University, Xinxiang, Henan 453003, P. R. China
| | - Xinya Han
- School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan, Anhui 243002, P. R. China
| | - Jufen Yan
- School of Chemistry and Chemical Engineering, Anhui University of Technology, Maanshan, Anhui 243002, P. R. China
| | - Minh Ngoc Ha
- VNU Key Laboratory of Advanced Materials for Green Growth, Faculty of Chemistry, University of Science, Vietnam National University, Hanoi 100000, Vietnam
| | - Quynh Mai Le
- Department of Plant Science, Faculty of Biology, University of Science, Vietnam National University, Hanoi 100000, Vietnam
| | - Yongtao Xu
- School of Medical Engineering, Henan International Joint Laboratory of Neural Information analysis and Drug Intelligent Design, Xinxiang Medical University, Xinxiang, Henan 453003, P. R. China
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2
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Huang J, Chen Z, Wu J. Recent Progress in Methyl-Radical-Mediated Methylation or Demethylation Reactions. ACS Catal 2021. [DOI: 10.1021/acscatal.1c02010] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Jiapian Huang
- Key Laboratory of Functional Small Organic Molecules, Ministry of Education, and Jiangxi Key Laboratory of Green Chemistry, College of Chemistry & Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang, Jiangxi 330022, P. R. China
- School of Pharmaceutical and Materials Engineering & Institute for Advanced Studies, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China
| | - Zhiyuan Chen
- Key Laboratory of Functional Small Organic Molecules, Ministry of Education, and Jiangxi Key Laboratory of Green Chemistry, College of Chemistry & Chemical Engineering, Jiangxi Normal University, 99 Ziyang Road, Nanchang, Jiangxi 330022, P. R. China
| | - Jie Wu
- School of Pharmaceutical and Materials Engineering & Institute for Advanced Studies, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, China
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3
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Dagar N, Singh S, Roy SR. Copper Catalyzed‐TBHP/DTBP Promoted C(sp
2
)−H Bond Scission of Aldehydes: An Approach to Transform Aldehyde to Esters. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100319] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Neha Dagar
- Department of Chemistry Indian Institute of Technology Delhi Indian Institute of Technology Delhi Hauz Khas New Delhi 110016 India
| | - Swati Singh
- Department of Chemistry Indian Institute of Technology Delhi Indian Institute of Technology Delhi Hauz Khas New Delhi 110016 India
| | - Sudipta Raha Roy
- Department of Chemistry Indian Institute of Technology Delhi Indian Institute of Technology Delhi Hauz Khas New Delhi 110016 India
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4
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Zhang L, Wang Z, Sun S, Ni S, Wen L, Li M. Metal‐Free
Catalyzed Cyclization of
N
‐Methoxybenzamides
to Construct Quaternary
Carbon‐Containing
Isoindolinones. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202000534] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Lin‐Bao Zhang
- State Key Laboratory Base of Eco‐Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology Qingdao Shandong 266042 China
| | - Zi‐Chen Wang
- State Key Laboratory Base of Eco‐Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology Qingdao Shandong 266042 China
| | - Sheng‐Zheng Sun
- State Key Laboratory Base of Eco‐Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology Qingdao Shandong 266042 China
| | - Shao‐Fei Ni
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University Shantou Guangdong 515063 China
| | - Li‐Rong Wen
- State Key Laboratory Base of Eco‐Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology Qingdao Shandong 266042 China
| | - Ming Li
- State Key Laboratory Base of Eco‐Chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology Qingdao Shandong 266042 China
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5
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Pan C, Yuan C, Yu JT. Peroxide-mediated synthesis of benzimidazo[2,1- a]isoquinoline-6(5 H)-ones via cascade methylation/ethylation and intramolecular cyclization. Org Biomol Chem 2021; 19:619-626. [PMID: 33367428 DOI: 10.1039/d0ob02383c] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A metal-free oxidative radical methylation/arylation of 2-arylbenzoimidazoles with DTBP as the oxidant and methyl radical source was developed. The reaction proceeds through a sequential methyl radical addition/cyclization pathway and affords a series of methyl functionalized benzimidazo[2,1-a]isoquinoline-6(5H)-ones in moderate to good yields. Besides, the ethylation/arylation of 2-arylbenzoimidazoles was also achieved with DTAP.
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Affiliation(s)
- Changduo Pan
- School of Chemical and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China.
| | - Cheng Yuan
- School of Chemical and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China.
| | - Jin-Tao Yu
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Changzhou University, Changzhou 213164, P. R. China.
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6
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Mao K, Dai L, Chen A, Liu Y, Liu X, Wang C, Rong L. Radical Annulation for the Synthesis of Cyclopenta[c]chromene Derivatives. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100066] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kaimin Mao
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science Jiangsu Normal University Xuzhou 221116 Jiangsu P. R. China
| | - Lei Dai
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science Jiangsu Normal University Xuzhou 221116 Jiangsu P. R. China
| | - Ang Chen
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science Jiangsu Normal University Xuzhou 221116 Jiangsu P. R. China
| | - Yun Liu
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science Jiangsu Normal University Xuzhou 221116 Jiangsu P. R. China
| | - Xiaoqin Liu
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science Jiangsu Normal University Xuzhou 221116 Jiangsu P. R. China
| | - Chang Wang
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science Jiangsu Normal University Xuzhou 221116 Jiangsu P. R. China
| | - Liangce Rong
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, School of Chemistry and Materials Science Jiangsu Normal University Xuzhou 221116 Jiangsu P. R. China
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7
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Ma S, Yu A, Zhang S, Zhang L, Meng X. Construction of [6-5-5-6-6] Pentacyclic Skeleton via a Phosphine-Catalyzed Domino Reaction and Mechanism Study. J Org Chem 2020; 85:7884-7895. [DOI: 10.1021/acs.joc.0c00566] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Shanshan Ma
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion; Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry & Chemical Engineering Tianjin University of Technology, Tianjin 300384, P.R. China
| | - Aimin Yu
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion; Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry & Chemical Engineering Tianjin University of Technology, Tianjin 300384, P.R. China
| | - Shunguang Zhang
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion; Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry & Chemical Engineering Tianjin University of Technology, Tianjin 300384, P.R. China
| | - Lei Zhang
- Tianjin Engineering Technology Center of Chemical Wastewater Source Reduction and Recycling, School of Science, Tianjin Chengjian University, Tianjin 300384, P.R. China
- College of Chemistry, Beijing Normal University, Beijing 100875, P. R. China
| | - Xiangtai Meng
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion; Tianjin Key Laboratory of Drug Targeting and Bioimaging, School of Chemistry & Chemical Engineering Tianjin University of Technology, Tianjin 300384, P.R. China
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8
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Qu Y, Xu W, Zhang J, Liu Y, Li Y, Song H, Wang Q. Visible-Light-Mediated [2+2+1] Carbocyclization Reactions of 1,7-Enynes with Bromofluoroacetate to Form Fused Monofluorinated Cyclopenta[ c]quinolin-4-ones. J Org Chem 2020; 85:5379-5389. [PMID: 32200642 DOI: 10.1021/acs.joc.0c00087] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Herein, we describe a new protocol for photoinduced radical [2+2+1] carbocyclization reactions of 1,7-enynes with bromofluoroacetate. These reactions, which proceed via a cascade involving fluoroalkylation, 6-exo-dig and 5-endo-trig cyclizations, H-transfer step, and oxidative dehydrogenation, provide an efficient and general route to a variety of fused monofluorinated cyclopenta[c]quinolin-4-one derivatives.
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Affiliation(s)
- Yi Qu
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, People's Republic of China
| | - Wentao Xu
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, People's Republic of China
| | - Jingjing Zhang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, People's Republic of China.,Tianjin Agricultural University, Tianjin 300384, People's Republic of China
| | - Yuxiu Liu
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, People's Republic of China
| | - Yongqiang Li
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, People's Republic of China
| | - Hongjian Song
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, People's Republic of China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry, College of Chemistry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Nankai University, Tianjin 300071, People's Republic of China
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9
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Li Y, Pan GA, Luo MJ, Li JH. Radical-mediated oxidative annulations of 1,n-enynes involving C–H functionalization. Chem Commun (Camb) 2020; 56:6907-6924. [DOI: 10.1039/d0cc02335c] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Recent progress in oxidative annulations of 1,n-enynes involving C–H functionalization is summarized.
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Affiliation(s)
- Yang Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle
- Nanchang Hangkong University
- Nanchang 330063
- China
| | - Gao-Ang Pan
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle
- Nanchang Hangkong University
- Nanchang 330063
- China
| | - Mu-Jia Luo
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle
- Nanchang Hangkong University
- Nanchang 330063
- China
- State Key Laboratory of Chemo/Biosensing and Chemometrics
| | - Jin-Heng Li
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle
- Nanchang Hangkong University
- Nanchang 330063
- China
- State Key Laboratory of Chemo/Biosensing and Chemometrics
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10
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Bismuth-catalyzed methylation and alkylation of quinone derivatives with tert-butyl peroxybenzoate as an oxidant. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130729] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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11
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Yu JX, Teng F, Xiang JN, Deng W, Li JH. One-Carbon Incorporation Using Cyclobutanone Oxime Ester Enabled [2 + 2 + 1] Carboannulation of 1,7-Enynes by C–C/N–O Bond Cleavage and C–H Functionalization. Org Lett 2019; 21:9434-9437. [DOI: 10.1021/acs.orglett.9b03643] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jiang-Xi Yu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
- Key Laboratory of Functional Metal−Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, China
| | - Fan Teng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Jian-Nan Xiang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
| | - Wei Deng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
| | - Jin-Heng Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
- Key Laboratory of Functional Metal−Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province, Hengyang Normal University, Hengyang 421008, China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
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12
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Xu CH, Li Y, Li JH, Xiang JN, Deng W. Recent advances in radical-mediated [2+2+m] annulation of 1,n-enynes. Sci China Chem 2019. [DOI: 10.1007/s11426-019-9615-0] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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13
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Luo K, Yang WC, Wei K, Liu Y, Wang JK, Wu L. Di-tert-butyl Peroxide-Mediated Radical C(sp2/sp3)–S Bond Cleavage and Group-Transfer Cyclization. Org Lett 2019; 21:7851-7856. [DOI: 10.1021/acs.orglett.9b02837] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Kai Luo
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Wen-Chao Yang
- Institute of Pesticide, School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China
| | - Kai Wei
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yue Liu
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jun-Ke Wang
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Lei Wu
- Jiangsu Key Laboratory of Pesticide Science and Department of Chemistry, College of Sciences, Nanjing Agricultural University, Nanjing 210095, China
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14
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Yang T, Xia WJ, Zhou B, Xin Y, Shen Y, Li YM. The Cascade Methylation/Cyclization of ortho
-Cyanoarylacrylamides with Dicumyl Peroxide. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900918] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Tao Yang
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650500 Kunming P. R. China
| | - Wen-Jin Xia
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650500 Kunming P. R. China
| | - Bin Zhou
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650500 Kunming P. R. China
| | - Yangchun Xin
- Katzin Diagnostic & Research PET/MR Center; Nemours/Alfred I. DuPont Hospital for Children; 19803 Wilmington DE United States
| | - Yuehai Shen
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650500 Kunming P. R. China
| | - Ya-Min Li
- Faculty of Life Science and Technology; Kunming University of Science and Technology; 650500 Kunming P. R. China
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15
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Qin J, Yu J, Li J, An D. Sulfur Incorporation Using Disulfanes as the Sulfur Atom Source Enabled Metal‐Free Heteroannulation of 1,7‐Enynes. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900621] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Jing‐Hao Qin
- State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan University Changsha 410082 People's Republic of China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong University Nanchang 330063 People's Republic of China
| | - Jiang‐Xi Yu
- State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan University Changsha 410082 People's Republic of China
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province Hengyang Normal University Hengyang 421008 People's Republic of China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong University Nanchang 330063 People's Republic of China
| | - Jin‐Heng Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan University Changsha 410082 People's Republic of China
- Key Laboratory of Functional Metal-Organic Compounds of Hunan Province, Key Laboratory of Functional Organometallic Materials, University of Hunan Province Hengyang Normal University Hengyang 421008 People's Republic of China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong University Nanchang 330063 People's Republic of China
| | - De‐Lie An
- State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan University Changsha 410082 People's Republic of China
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16
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Patel OPS, Nandwana NK, Sah AK, Kumar A. Metal-free synthesis of aminomethylated imidazoheterocycles: dual role of tert-butyl hydroperoxide as both an oxidant and a methylene source. Org Biomol Chem 2019; 16:8620-8628. [PMID: 30379182 DOI: 10.1039/c8ob02432d] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A novel and efficient aminomethylation approach has been developed for the regioselective functionalization of imidazoheterocycles under metal-free conditions. A wide range of imidazoheterocycles and 2/4-aminoazaheterocycles successfully provided corresponding aminomethylated imidazoheterocycles in moderate to excellent (33-80%) yields. The isotopic labelling study suggested that TBHP played a dual role as both an oxidant and a methylene source in this transformation. The developed protocol follows a radical pathway which is supported by radical trapping experiments.
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Affiliation(s)
- Om P S Patel
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani Campus, 333031, Rajasthan, India.
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17
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Gong X, Wang M, Ye S, Wu J. Synthesis of 3-(Methylsulfonyl)benzo[ b]thiophenes from Methyl(2-alkynylphenyl)sulfanes and Sodium Metabisulfite via a Radical Relay Strategy. Org Lett 2019; 21:1156-1160. [PMID: 30698982 DOI: 10.1021/acs.orglett.9b00100] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A radical relay strategy for the generation of 3-(methylsulfonyl)benzo[ b]thiophenes through a reaction of methyl(2-alkynylphenyl)sulfanes with sodium metabisulfite in the presence of a photocatalyst under visible light irradiation is developed. This photoinduced sulfonylation proceeds efficiently under mild conditions by using a catalytic amount of sodium methylsulfinate as an initiator. During the reaction process, the methyl radical generated in situ is the key intermediate, which undergoes a radical relay with the combination of sulfur dioxide to afford methylsulfonyl-containing compounds.
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Affiliation(s)
- Xinxing Gong
- Institute for Advanced Studies , Taizhou University , 1139 Shifu Avenue , Taizhou 318000 , China.,Department of Chemistry , Fudan University , 2005 Songhu Road , Shanghai 200438 , China
| | - Mengjiao Wang
- Department of Chemistry , Fudan University , 2005 Songhu Road , Shanghai 200438 , China
| | - Shengqing Ye
- Institute for Advanced Studies , Taizhou University , 1139 Shifu Avenue , Taizhou 318000 , China
| | - Jie Wu
- Institute for Advanced Studies , Taizhou University , 1139 Shifu Avenue , Taizhou 318000 , China.,Department of Chemistry , Fudan University , 2005 Songhu Road , Shanghai 200438 , China
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18
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Yu JX, Niu S, Hu M, Xiang JN, Li JH. Metal-free oxidative [2+2+1] heteroannulation of 1,7-enynes with thiocyanates toward thieno[3,4-c]quinolin-4(5H)-ones. Chem Commun (Camb) 2019; 55:6727-6730. [PMID: 31119230 DOI: 10.1039/c9cc02242b] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A new metal-free oxidative [2+2+1] heteroannulation of 1,7-enynes with thiocyanates for producing thieno[3,4-c]quinolin-4(5H)-ones is presented. This reaction employs benzoylperoxide (BPO) as the oxidant and sodium thiocyanate as the sulfur source to enable the formation of three chemical bonds, two C-S bonds and one C-C bond, in a single reaction, and represents a new, practical access to S-heterocycles with the avoidance of the use of metal catalysts and excess bases.
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Affiliation(s)
- Jiang-Xi Yu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China.
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19
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Huang MH, Hao WJ, Jiang B. Recent Advances in Radical-Enabled Bicyclization and Annulation/1,n
-Bifunctionalization Reactions. Chem Asian J 2018; 13:2958-2977. [DOI: 10.1002/asia.201801119] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Min-Hua Huang
- School of Chemistry & Materials Science; Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials; Jiangsu Normal University; Xuzhou 221116 P. R. China
- Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009, Jiangsu P. R. China
| | - Wen-Juan Hao
- School of Chemistry & Materials Science; Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials; Jiangsu Normal University; Xuzhou 221116 P. R. China
| | - Bo Jiang
- School of Chemistry & Materials Science; Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials; Jiangsu Normal University; Xuzhou 221116 P. R. China
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20
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Bao X, Yokoe T, Ha TM, Wang Q, Zhu J. Copper-catalyzed methylative difunctionalization of alkenes. Nat Commun 2018; 9:3725. [PMID: 30213939 PMCID: PMC6137206 DOI: 10.1038/s41467-018-06246-6] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 08/21/2018] [Indexed: 12/02/2022] Open
Abstract
Trifluoromethylative difunctionalization and hydrofunctionalization of unactivated alkenes have been developed into powerful synthetic methodologies. On the other hand, methylative difunctionalization of olefins remains an unexplored research field. We report in this paper the Cu-catalyzed alkoxy methylation, azido methylation of alkenes using dicumyl peroxide (DCP), and di-tert-butyl peroxide (DTBP) as methyl sources. Using functionalized alkenes bearing a tethered nucleophile (alcohol, carboxylic acid, and sulfonamide), methylative cycloetherification, lactonization, and cycloamination processes are subsequently developed for the construction of important heterocycles such as 2,2-disubstituted tetrahydrofurans, tetrahydropyrans, γ-lactones, and pyrrolidines with concurrent generation of a quaternary carbon center. The results of control experiments suggest that the 1,2-alkoxy methylation of alkenes goes through a radical-cation crossover mechanism, whereas the 1,2-azido methylation proceeds via a radical addition and Cu-mediated azide transfer process. While the trifluoromethylative difunctionalization of unactivated alkenes has been largely explored, methylative difunctionalization remains underinvestigated. Here, the authors report copper-catalyzed alkoxy- and azido-methylation reactions of alkenes leading to important synthetic building blocks and valuable O- and N-heterocycles.
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Affiliation(s)
- Xu Bao
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304, Lausanne, CH-1015, Switzerland
| | - Takayuki Yokoe
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304, Lausanne, CH-1015, Switzerland
| | - Tu M Ha
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304, Lausanne, CH-1015, Switzerland
| | - Qian Wang
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304, Lausanne, CH-1015, Switzerland
| | - Jieping Zhu
- Laboratory of Synthesis and Natural Products, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL-SB-ISIC-LSPN, BCH5304, Lausanne, CH-1015, Switzerland.
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21
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Zhu YL, Zhu CF, Zhou P, Hao WJ, Wang DC, Tu SJ, Jiang B. Pd(II)-Catalyzed Carbonyl-Directing Activation of Alkenes: Selective Fluorosulfonylation and Aminosulfonylation of 1,7-Enynes. J Org Chem 2018; 83:9641-9653. [DOI: 10.1021/acs.joc.8b00994] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Yi-Long Zhu
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
- Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 210009, Jiangsu P. R. China
| | - Chi-Fan Zhu
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
- Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 210009, Jiangsu P. R. China
| | - Peng Zhou
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Wen-Juan Hao
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - De-Cai Wang
- Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing, 210009, Jiangsu P. R. China
| | - Shu-Jiang Tu
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
| | - Bo Jiang
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, P. R. China
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22
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Liu Y, Wang QL, Zhou CS, Xiong BQ, Zhang PL, Yang CA, Tang KW. Oxidative C-C Bond Functionalization of Methylenecyclopropanes with Aldehydes for the Formation of 2-Acyl-3,4-dihydronaphthalenes. J Org Chem 2018; 83:4657-4664. [PMID: 29584957 DOI: 10.1021/acs.joc.8b00427] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A new FeCl2- and DTBP (di- tert-butyl peroxide)-promoted oxidative ring-opening and cyclization of methylenecyclopropanes with aldehydes for the synthesis of 2-acyl-3,4-dihydronaphthalenes is presented. This oxidative cyclization reaction proceeds via a radical addition, ring-opening, and cyclization sequence facilitated by a Lewis acid, and it offers a practical and straightforward route for the oxidative cyclization of methylenecyclopropanes with an aromatic carbon and a C(sp2)-H bond by simultaneously forming two new carbon-carbon bonds.
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Affiliation(s)
- Yu Liu
- Department of Chemistry and Chemical Engineering , Hunan Institute of Science and Technology , Yueyang 414006 , China
| | - Qiao-Lin Wang
- Department of Chemistry and Chemical Engineering , Hunan Institute of Science and Technology , Yueyang 414006 , China
| | - Cong-Shan Zhou
- 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
| | - Pan-Liang Zhang
- Department of Chemistry and Chemical Engineering , Hunan Institute of Science and Technology , Yueyang 414006 , China
| | - Chang-An Yang
- 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
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23
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Luo Z, Han X, Fang Y, Liu P, Feng C, Li Z, Xu X. Copper-catalyzed decarboxylative and oxidative decarbonylative cross-coupling between cinnamic acids and aliphatic aldehydes. Org Chem Front 2018. [DOI: 10.1039/c8qo00927a] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A convenient copper-catalyzed decarboxylative and oxidative decarbonylative cross-coupling of cinnamic acids with aliphatic aldehydes was achieved, which provides a useful strategy of C(sp3)–C(sp2) bonds construction for the synthesis of alkyl-substituted E-alkenes.
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Affiliation(s)
- Zaigang Luo
- College of Chemical Engineering
- AnHui University of Science and Technology
- Huainan 232001
- P. R. China
| | - Xinxin Han
- College of Chemical Engineering
- AnHui University of Science and Technology
- Huainan 232001
- P. R. China
| | - Yuyu Fang
- College of Chemical Engineering
- AnHui University of Science and Technology
- Huainan 232001
- P. R. China
| | - Peng Liu
- Guang Zhou Institutes of Biomedicine and Health
- Chinese Academy of Sciences
- Guangzhou 510530
- China
| | - Chengtao Feng
- College of Chemical Engineering
- AnHui University of Science and Technology
- Huainan 232001
- P. R. China
| | - Zhong Li
- College of Chemical Engineering
- AnHui University of Science and Technology
- Huainan 232001
- P. R. China
| | - Xuemei Xu
- College of Chemical Engineering
- AnHui University of Science and Technology
- Huainan 232001
- P. R. China
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24
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Liu Y, Song RJ, Luo S, Li JH. Visible-Light-Promoted Tandem Annulation of N-(o-Ethynylaryl)acrylamides with CH2Cl2. Org Lett 2017; 20:212-215. [DOI: 10.1021/acs.orglett.7b03561] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yu Liu
- Key
Laboratory of Jiangxi Province for Persistent Pollutants Control and
Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
- Department
of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
| | - Ren-Jie Song
- Key
Laboratory of Jiangxi Province for Persistent Pollutants Control and
Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Shenglian Luo
- Key
Laboratory of Jiangxi Province for Persistent Pollutants Control and
Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
| | - Jin-Heng Li
- Key
Laboratory of Jiangxi Province for Persistent Pollutants Control and
Resources Recycle, Nanchang Hangkong University, Nanchang 330063, China
- Department
of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, China
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
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