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Zhuang D, Wu Y, Wang S, Tao Y, Liu P, Luo X, Wang T, Yan R. TFA-Mediated Synthesis of 1,2,4-Oxadiazoles from Carbamates and Nitriles. J Org Chem 2024; 89:7330-7338. [PMID: 38685200 DOI: 10.1021/acs.joc.4c00640] [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
An unprecedented protocol for the synthesis of 1,2,4-oxadiazoles from carbamates has been developed by employing nitriles as both substrates and solvents. This one-pot procedure achieves the formation of C═N bonds via TFA-mediated [3+2] annulation. A series of 1,2,4-oxadiazoles are synthesized in moderate to good yields.
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Affiliation(s)
- Daijiao Zhuang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, China
| | - Yuankun Wu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, China
| | - Shuairan Wang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, China
| | - Yuelin Tao
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, China
| | - Peihua Liu
- Research Institute of Oil and Gas Technology of Changqing Oilfield Company, Xian 710018, Shanxi, China
| | - Xiaofeng Luo
- Chengdu Guibao Science and Technology Company, Ltd., Chengdu 610041, Sichuan, China
| | - Tianqiang Wang
- Chengdu Guibao Science and Technology Company, Ltd., Chengdu 610041, Sichuan, China
| | - Rulong Yan
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, Gansu, China
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2
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Du YD, Wang S, Du HW, Chang XY, Chen XY, Li YL, Shu W. Organophotocatalysed synthesis of 2-piperidinones in one step via [1 + 2 + 3] strategy. Nat Commun 2023; 14:5339. [PMID: 37660185 PMCID: PMC10475035 DOI: 10.1038/s41467-023-40197-x] [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: 03/12/2023] [Accepted: 07/13/2023] [Indexed: 09/04/2023] Open
Abstract
Six-membered N-containing heterocycles, such as 2-piperidinone derivatives, with diverse substitution patterns are widespread in natural products, drug molecules and serve as key precursors for piperidines. Thus, the development of stereoselective synthesis of multi-substituted 2-piperidinones are attractive. However, existing methods heavily rely on modification of pre-synthesized backbones which require tedious multi-step procedure and suffer from limited substitution patterns. Herein, an organophotocatalysed [1 + 2 + 3] strategy was developed to enable the one-step access to diverse substituted 2-piperidinones from easily available inorganic ammonium salts, alkenes, and unsaturated carbonyl compounds. This mild protocol exhibits exclusive chemoselectivity over two alkenes, tolerating both terminal and internal alkenes with a wide range of functional groups.
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Affiliation(s)
- Yi-Dan Du
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, P. R. China
| | - Shan Wang
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, P. R. China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, 300071, Tianjin, P. R. China
| | - Hai-Wu Du
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, P. R. China
| | - Xiao-Yong Chang
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, P. R. China
| | - Xiao-Yi Chen
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, P. R. China
| | - Yu-Long Li
- College of Chemistry and Environmental Engineering, Sichuan University of Science and Engineering, 643000, Zigong, P. R. China
| | - Wei Shu
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, P. R. China.
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, 300071, Tianjin, P. R. China.
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3
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Dhak MS, Arunprasath D, Argent SP, Cuthbertson JD. A Domino Radical Amidation/Semipinacol Approach to All-Carbon Quaternary Centers Bearing an Aminomethyl Group. Chemistry 2023; 29:e202300922. [PMID: 37278542 PMCID: PMC10947466 DOI: 10.1002/chem.202300922] [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: 03/23/2023] [Revised: 06/01/2023] [Accepted: 06/02/2023] [Indexed: 06/07/2023]
Abstract
A photoredox-mediated radical amidation ring-expansion sequence that enables the generation of all-carbon quaternary centers bearing a protected aminomethyl substituent is described. The methodology can be applied to both styrene and unactivated alkene substrates generating structurally diverse sp3 -rich amine derivatives in a concise manner.
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Affiliation(s)
- Mandeep S. Dhak
- GlaxoSmithKline Carbon Neutral Laboratories for Sustainable ChemistryUniversity of Nottingham, Jubilee CampusTriumph RoadNottinghamNG7 2TUUK
- School of ChemistryUniversity of NottinghamUniversity ParkNottinghamNG7 2RDUK
| | - Dhanarajan Arunprasath
- GlaxoSmithKline Carbon Neutral Laboratories for Sustainable ChemistryUniversity of Nottingham, Jubilee CampusTriumph RoadNottinghamNG7 2TUUK
- School of ChemistryUniversity of NottinghamUniversity ParkNottinghamNG7 2RDUK
| | - Stephen P. Argent
- School of ChemistryUniversity of NottinghamUniversity ParkNottinghamNG7 2RDUK
| | - James D. Cuthbertson
- GlaxoSmithKline Carbon Neutral Laboratories for Sustainable ChemistryUniversity of Nottingham, Jubilee CampusTriumph RoadNottinghamNG7 2TUUK
- School of ChemistryUniversity of NottinghamUniversity ParkNottinghamNG7 2RDUK
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4
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Luo M, Zhu S, Shi C, Du Y, Yang C, Guo L, Xia W. Photoinduced Remote C(sp 3)-H Cyanation and Oxidation Enabled by a Vinyl Radical-Mediated 1,5-HAT Strategy. Org Lett 2022; 24:6560-6565. [PMID: 36069753 DOI: 10.1021/acs.orglett.2c02523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report a vinyl radical-mediated 1,5-hydrogen atom transfer (1,5-HAT) strategy for the remote C(sp3)-H functionalization reaction, which includes cyanation, oxidation, and etherification under visible-light-induced photochemical conditions. This reaction is achieved using readily available alkyl N-hydroxyphthalimide esters as radical precursors, which can efficiently react with diverse alkynes to form key vinyl radical intermediates followed by a 1,5-HAT process. A series of structurally diverse γ-cyano, γ-carbonyl, and γ-oxygenated alkenes with excellent stereoselectivity can be efficiently constructed by this synthetic protocol.
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Affiliation(s)
- Mengqi Luo
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Shibo Zhu
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Chengcheng Shi
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Yunlong Du
- School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Chao Yang
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Lin Guo
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China
| | - Wujiong Xia
- State Key Lab of Urban Water Resource and Environment, School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China.,School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
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5
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Abstract
A radical shift toward energy transfer photocatalysis from electron transfer photocatalysis under visible-light photoirradiation is often due to the greener prospects of atom and process economy. Recent advances in energy transfer photocatalysis embrace unique strategies for direct small-molecule activation and sometimes extraordinary chemical bond formation in the absence of additional/sacrificial reagents. Selective energy transfer photocatalysis requires careful selection of substrates and photocatalysts for a perfect match with respect to their triplet energies while having incompatible redox potentials to prevent competitive electron transfer pathways. Substrates containing labile N-O bonds are potential targets for generating reactive key intermediates via photocatalysis to access a variety of functionalized molecules. Typically, the differential electron densities of N and O heteroatoms have been exploited for generation of either N- or O-centered radical intermediates from the functionalized substrates by the electron transfer pathway. However, the latest developments involve direct N-O bond homolysis via energy transfer to generate both N- and O-centered radicals for their subsequent utilization in diverse organic transformations, also in the absence of sacrificial redox reagents. In this Account, we highlight our key contributions in the field of N-O bond activation via energy transfer photocatalysis to generate reactive radical intermediates, with coverage of useful mechanistic insights. More specifically, well-designed N-O bond-containing substrates such as 1,2,4-oxadiazolines, oxime esters, N-indolyl carbonates, and N-enoxybenzotriazoles were successfully utilized in versatile transformations involving selective energy transfer over electron transfer from photocatalysts with high triplet state energy. Direct access to reactive N-, O-, and C-centered (if decarboxylation follows) radical intermediates was achieved for diverse cross-couplings and rearrangement processes. In particular, a variety of open-shell nitrogen reactive intermediates, including N(sp2) and N(sp3) radicals and nitrenes, have been utilized. Notably, diversified transformations of identical substrates have been achieved through careful control of the reaction conditions. 1,2,4-Oxadiazolines were converted into spiro-azolactams through iminyl intermediates in the presence of 1O2, benzimidazoles, or sulfoximines with external sulfoxide reagent through triplet nitrene intermediates under inert conditions. Besides, oxime esters underwent either intramolecular C(sp3)-N radical-radical coupling or intermolecular C(sp3)-N radical-radical coupling by a combined energy transfer-hydrogen atom transfer strategy. Furthermore, a series of electrochemical and photophysical experiments as well as computational studies were performed to substantiate the proposed selective energy-transfer-driven reaction pathways. We hope that this Account will serve as a guide for the rational design of selective energy transfer processes through the activation of further labile chemical bonds.
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Affiliation(s)
- Da Seul Lee
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul06974, Republic of Korea
| | - Vineet Kumar Soni
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul06974, Republic of Korea
| | - Eun Jin Cho
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul06974, Republic of Korea
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6
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[3+2] Cycloaddition of alkyl aldehydes and alkynes enabled by photoinduced hydrogen atom transfer. Nat Commun 2022; 13:4734. [PMID: 35961987 PMCID: PMC9374768 DOI: 10.1038/s41467-022-32467-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 07/29/2022] [Indexed: 11/25/2022] Open
Abstract
[3+2] Cycloaddition is a step- and atom-economic method for the synthesis of five-membered rings. Despite the great success of 1,3-dipolar cycloadditions, the radical [3+2] annulation of alkynes remains a formidable challenge. Herein, a photoinduced decatungstate-catalyzed [3+2] cycloaddition of various internal alkynes using abundant aliphatic aldehydes as a three-carbon synthon is developed, producing elaborate cyclopentanones in 100% atom economy with excellent site-, regio-, and diastereoselectivity under mild conditions. The catalytic cycle consists of hydrogen atom abstraction from aldehydes, radical addition, 1,5-hydrogen atom transfer, anti-Baldwin 5-endo-trig cyclization, and back hydrogen abstraction. The power of this method is showcased by the late-stage elaboration of medicinally relevant molecules and total or formal synthesis of (±)-β-cuparenone, (±)-laurokamurene B, and (±)-cuparene. In contrast to the prevalence of 1,3-dipolar cycloadditions, radical [3+2] annulations of alkynes are underexplored. Here, the authors describe [3+2] cycloadditions of various internal alkynes with readily accessible aliphatic aldehydes via photoinduced decatungstate catalysis.
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7
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Shennan BDA, Berheci D, Crompton JL, Davidson TA, Field JL, Williams BA, Dixon DJ. Branching out: redox strategies towards the synthesis of acyclic α-tertiary ethers. Chem Soc Rev 2022; 51:5878-5929. [PMID: 35770619 DOI: 10.1039/d1cs00669j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Acyclic α-tertiary ethers represent a highly prevalent functionality, common to high-value bioactive molecules, such as pharmaceuticals and natural products, and feature as crucial synthetic handles in their construction. As such their synthesis has become an ever-more important goal in synthetic chemistry as the drawbacks of traditional strong base- and acid-mediated etherifications have become more limiting. In recent years, the generation of highly reactive intermediates via redox approaches has facilitated the synthesis of highly sterically-encumbered ethers and accordingly these strategies have been widely applied in α-tertiary ether synthesis. This review summarises and appraises the state-of-the-art in the application of redox strategies enabling acyclic α-tertiary ether synthesis.
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Affiliation(s)
- Benjamin D A Shennan
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Diana Berheci
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Jessica L Crompton
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Timothy A Davidson
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Joshua L Field
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Benedict A Williams
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
| | - Darren J Dixon
- Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
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8
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Nguyen QH, Hwang HS, Cho EJ, Shin S. Energy Transfer Photolysis of N-Enoxybenzotriazoles into Benzotriazolyl and α-Carbonyl Radicals. ACS Catal 2022. [DOI: 10.1021/acscatal.2c02862] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Quynh H. Nguyen
- Department of Chemistry, Research Institute for Natural Sciences and Center for New Directions in Organic Synthesis (CNOS), Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea
| | - Ho Seong Hwang
- Department of Chemistry, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Eun Jin Cho
- Department of Chemistry, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Seunghoon Shin
- Department of Chemistry, Research Institute for Natural Sciences and Center for New Directions in Organic Synthesis (CNOS), Hanyang University, 222 Wangsimni-ro, Seongdong-gu, Seoul 04763, Korea
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9
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Feng J, Zhang F, Shu C, Zhu G. Copper‐Catalyzed
1,2,
5‐Trifunctionalization
of Terminal Alkynes Using
SR
as a Transient Directing Group for Radical Translocation. CHINESE J CHEM 2022. [DOI: 10.1002/cjoc.202200092] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jian Feng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry Zhejiang Normal University 688 Yingbin Road Jinhua 321004 P. R. China
| | - Fang Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry Zhejiang Normal University 688 Yingbin Road Jinhua 321004 P. R. China
| | - Chenyun Shu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry Zhejiang Normal University 688 Yingbin Road Jinhua 321004 P. R. China
| | - Gangguo Zhu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry Zhejiang Normal University 688 Yingbin Road Jinhua 321004 P. R. China
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10
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Zhou Y, Qin Y, Wang Q, Zhang Z, Zhu G. Photocatalytic Sulfonylcarbocyclization of Alkynes Using SEt as a Traceless Directing Group: Access to Cyclopentenes and Indenes. Angew Chem Int Ed Engl 2022; 61:e202110864. [PMID: 34747130 DOI: 10.1002/anie.202110864] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 11/01/2021] [Indexed: 11/09/2022]
Abstract
Cyclopentenes and indenes are important structural scaffolds in synthetic, medical, and material chemistry. Cyclization of alkynes via remote C-H functionalization is an appealing approach to construct these motifs due to its high efficiency and step-economy. Herein, a traceless directing group strategy was designed to reverse the regioselectivity of radical addition which enabled an unprecedented photocatalytic sulfonylcarbocyclization of terminal alkynes by forming C-C bond on inert C(sp3 )-H bond. It offers a facile access to decorated cyclopentenes and indenes under mild conditions. The resultant products could be converted into a set of valuable molecular scaffolds, including a key intermediate of AM-6226. Mechanistic experiments suggest a radical cascade pathway comprising a Markovnikov-type sulfonylation, 1,5-hydrogen atom transfer, 5-endo-trig cyclization, and β-elimination. This study lays further groundwork for the use of anti-Baldwin 5-endo-trig radical cyclization in rapidly assembling five-membered carbocycles.
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Affiliation(s)
- Yulu Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua, 321004, P. R. China
| | - Yizhou Qin
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua, 321004, P. R. China
| | - Qinggui Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua, 321004, P. R. China
| | - Zuxiao Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua, 321004, P. R. China
| | - Gangguo Zhu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua, 321004, P. R. China
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11
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Zhou Y, Qin Y, Wang Q, Zhang Z, Zhu G. Photocatalytic Sulfonylcarbocyclization of Alkynes Using SEt as a Traceless Directing Group: Access to Cyclopentenes and Indenes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202110864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yulu Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Department of Chemistry Zhejiang Normal University 688 Yingbin Road Jinhua 321004 P. R. China
| | - Yizhou Qin
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Department of Chemistry Zhejiang Normal University 688 Yingbin Road Jinhua 321004 P. R. China
| | - Qinggui Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Department of Chemistry Zhejiang Normal University 688 Yingbin Road Jinhua 321004 P. R. China
| | - Zuxiao Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Department of Chemistry Zhejiang Normal University 688 Yingbin Road Jinhua 321004 P. R. China
| | - Gangguo Zhu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Department of Chemistry Zhejiang Normal University 688 Yingbin Road Jinhua 321004 P. R. China
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12
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Liu S, Zhang Y, Zhao C, Zhou X, Liang J, Zhang P, Jiao LY, Yang X, Ma Y. N-Aroyloxycarbamates as switchable nitrogen and oxygen precursor: Ir/Cu controlled divergent C–H functionalization of heteroarenes. Org Chem Front 2022. [DOI: 10.1039/d1qo01827b] [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
Chemodivergent control in the functionalization of nitrogen-directed aromatic C–H bonds has been achieved by a switchable catalyst.
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Affiliation(s)
- Shanshan Liu
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi, 710021, P. R. China
| | - Yuanyuan Zhang
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi, 710021, P. R. China
| | - Chen Zhao
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi, 710021, P. R. China
| | - Xianying Zhou
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi, 710021, P. R. China
| | - Jiahui Liang
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi, 710021, P. R. China
| | - Pingjun Zhang
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi, 710021, P. R. China
| | - Lin-Yu Jiao
- School of Chemical Engineering, Northwest University, Xi'an, Shaanxi, 710069, P. R. China
| | - Xiufang Yang
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi, 710021, P. R. China
| | - Yangmin Ma
- Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an, Shaanxi, 710021, P. R. China
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13
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Yue B, Wu X, Zhu C. Recent Advances in Vinyl Radical-Mediated Hydrogen Atom Transfer. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202108027] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Wang YZ, Lin WJ, Liu HC, Yu W. Visible-light-promoted radical amidoarylation of arylacrylamides towards amidated oxindoles. Org Chem Front 2022. [DOI: 10.1039/d2qo00127f] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A visible-light-promoted intermolecular radical amidation/cyclization of arylacrylamides was realized by using N-aminopyridinium salts as the source of primary amidyl radicals. The reaction exhibits a broad scope and good functionality tolerance,...
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15
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Le S, Bai Y, Qiu J, Zhang Z, Zheng H, Zhu G. Access to cyclopentenones via copper-catalyzed 5- endo trifluoromethylcarbocyclization of ynones. Org Chem Front 2022. [DOI: 10.1039/d2qo00843b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A copper-catalyzed 5-endo-selective trifluoromethylcarbocyclization of ynones is realized for the direct construction of trifluoromethylated cyclopentenones.
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Affiliation(s)
- Siya Le
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P. R. China
| | - Yihui Bai
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P. R. China
| | - Jiayan Qiu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P. R. China
| | - Zuxiao Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P. R. China
| | - Hanliang Zheng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P. R. China
| | - Gangguo Zhu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P. R. China
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16
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Zhou F, Li M, Jiang H, Wu W. Recent Advances in Transformations Involving Electron‐Rich Alkenes: Functionalization, Cyclization, and Cross‐Metathesis Reactions. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100585] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Fei Zhou
- State Key Laboratory of Luminescent Materials and Devices School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 People's Republic of China
| | - Meng Li
- State Key Laboratory of Luminescent Materials and Devices School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 People's Republic of China
| | - Huanfeng Jiang
- State Key Laboratory of Luminescent Materials and Devices School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 People's Republic of China
- State Key Laboratory of Pulp and Paper Engineering South China University of Technology Guangzhou 510640 People's Republic of China
| | - Wanqing Wu
- State Key Laboratory of Luminescent Materials and Devices School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 People's Republic of China
- State Key Laboratory of Pulp and Paper Engineering South China University of Technology Guangzhou 510640 People's Republic of China
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17
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Zhou XY, Chen X. ZnCl2 Catalyzed Ring-Opening Reaction of Symmetrical Epoxides with Aromatic Amines for the Synthesis of 1,2-Amino Alcohols. ORG PREP PROCED INT 2021. [DOI: 10.1080/00304948.2021.1994289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Xiao-Yu Zhou
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, China
| | - Xia Chen
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, China
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18
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Chen P, Xie J, Chen Z, Xiong B, Liu Y, Yang C, Tang K. Visible‐Light‐Mediated Nitrogen‐Centered Radical Strategy: Preparation of 3‐Acylated Spiro[4,5]trienones. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100852] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Pu Chen
- Department of Chemistry and Chemical Engineering Hunan Institute of Science and Technology Yueyang Hunan 414006 People's Republic of China
| | - Jun Xie
- Department of Chemistry and Chemical Engineering Hunan Institute of Science and Technology Yueyang Hunan 414006 People's Republic of China
| | - Zan Chen
- Department of Chemistry and Chemical Engineering Hunan Institute of Science and Technology Yueyang Hunan 414006 People's Republic of China
| | - Bi‐Quan Xiong
- Department of Chemistry and Chemical Engineering Hunan Institute of Science and Technology Yueyang Hunan 414006 People's Republic of China
| | - Yu Liu
- Department of Chemistry and Chemical Engineering Hunan Institute of Science and Technology Yueyang Hunan 414006 People's Republic of China
| | - Chang‐An Yang
- Department of Chemistry and Chemical Engineering Hunan Institute of Science and Technology Yueyang Hunan 414006 People's Republic of China
| | - Ke‐Wen Tang
- Department of Chemistry and Chemical Engineering Hunan Institute of Science and Technology Yueyang Hunan 414006 People's Republic of China
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19
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Zhao G, Li J, Wang T. Metal‐free Photocatalytic Intermolecular anti‐Markovnikov Hydroamination of Unactivated Alkenes. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100049] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Gaoyuan Zhao
- Department of Chemistry, University at Albany State University of New York 1400 Washington Avenue Albany New York 12222 USA
- Department of Chemistry SUNY Stony Brook 100 Nicolls Road Stony Brook NY 11790 USA
| | - Juncheng Li
- Department of Chemistry, University at Albany State University of New York 1400 Washington Avenue Albany New York 12222 USA
| | - Ting Wang
- Department of Chemistry, University at Albany State University of New York 1400 Washington Avenue Albany New York 12222 USA
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20
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Yi X, Hu X. Intermolecular oxidative amination of unactivated alkenes by dual photoredox and copper catalysis. Chem Sci 2020; 12:1901-1906. [PMID: 34163953 PMCID: PMC8179295 DOI: 10.1039/d0sc05952h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Oxidative amination of alkenes via amidyl radical addition is potentially an efficient method to generate allylic amines, which are versatile synthetic intermediates to bioactive compounds and organic materials. Here by combining photochemical generation of amidyl radicals with Cu-mediated β-H elimination of alkyl radicals, we have developed an intermolecular oxidative amination of unactivated alkenes. The reaction relies on tandem photoredox and copper catalysis, and works for both terminal and internal alkenes. The radical nature of the reaction and the mild conditions lead to high functional group tolerance. Oxidative amination via amidyl radical addition of unactivated alkenes was realized by dual photoredox and copper catalysis.![]()
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Affiliation(s)
- Xiangli Yi
- Laboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL) Lausanne 1015 Switzerland
| | - Xile Hu
- Laboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL) Lausanne 1015 Switzerland
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21
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Xiong Z, Zhang F, Yu Y, Tan Z, Zhu G. AIBN-Induced Remote Trifluoromethyl-Alkynylation of Thioalkynes. Org Lett 2020; 22:4088-4092. [PMID: 32427485 DOI: 10.1021/acs.orglett.0c01147] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel α,α'-azobis(isobutyronitrile) (AIBN)-induced remote trifluoromethyl-alkynylation of thioalkynes with alkynyl triflones as both the trifluoromethyl and alkyne sources is described. Structurally diverse trifluoromethylated (Z)-enynes can be constructed with full control of regio-, stereo-, and site-selectivity, which serves as a highly selective method for the rapid construction of trifluoromethylated molecules.
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Affiliation(s)
- Zhimin Xiong
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P.R. China
| | - Fang Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P.R. China
| | - Yongqi Yu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P.R. China
| | - Ze Tan
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, P.R. China
| | - Gangguo Zhu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P.R. China
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22
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Wright SW, Simpson B, Chinigo G, Perry MA, Maguire RJ. Reduction of 2-hydroxy-3-arylmorpholines to 3-aryl morpholines. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131253] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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23
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Shang T, Zhang J, Zhang Y, Zhang F, Li XS, Zhu G. Photocatalytic Remote Oxyfluoroalkylation of Heteroalkynes: Regio-, Stereo-, and Site-Selective Access to Complex Fluoroalkylated (Z)-Alkenes. Org Lett 2020; 22:3667-3672. [DOI: 10.1021/acs.orglett.0c01163] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tianbo Shang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P. R. China
| | - Junhua Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P. R. China
| | - Yan Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P. R. China
| | - Fang Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P. R. China
| | - Xin-Sheng Li
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P. R. China
| | - Gangguo Zhu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, P. R. China
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24
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Abstract
Vicinal alkene carboamination is a highly efficient and practical synthetic strategy for the straightforward preparation of diverse and valuable amine derivatives starting from simple compounds. During the last decade that approach has found continuous research interests and various practical methods have been developed using transition-metal catalysis. Driven by the renaissance of synthetic radical chemistry, intermolecular radical alkene carboamination comprising a C-C bond and a C-N bond forming step has been intensively investigated recently culminating in novel strategies and improved protocols which complement existing methodologies. Radical alkene carboamination can be achieved via three different reaction modes. Such cascades can proceed through N-radical addition to an alkene with subsequent C-C bond formation leading to 2,1-carboamination products. Alternatively, the C-C bond can be installed prior to the C-N bond via initial C-radical addition to the alkene with subsequent β-amination resulting in 1,2-carboamination. The third mode comprises initial single electron oxidation of the alkene to the corresponding alkene radical cation that gets trapped by an N-nucleophile and the cascade is terminated by radical C-C bond formation. In this review, the three different conceptual approaches will be discussed and examples from the recent literature will be presented. Further, the reader will get insights into the mechanism of the different transformations.
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Affiliation(s)
- Heng Jiang
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstraße 40, 48149 Münster, Germany.
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25
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Synthesis of Epoxides from Alkyl Bromides and Alcohols with in Situ Generation of Dimethyl Sulfonium Ylide in DMSO Oxidations. J Org Chem 2020; 85:537-547. [PMID: 31808693 DOI: 10.1021/acs.joc.9b02621] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Direct conversion of the readily available alkyl bromides and alcohols to value-added epoxides using dimethyl sulfoxide (DMSO) under mild reaction conditions has been developed. Benzyl and allyl bromides, and activated and unactivated alcohols all proceeded smoothly to give epoxides in high to excellent yield. Dimethyl sulfide, generated by DMSO oxidations, was in situ elaborated to form the substituted dimethyl sulfonium ylide species that participates in the Corey-Chaykovsky epoxidation in a domino and one-pot fashion, respectively.
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26
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Liu C, Jiang Q, Lin Y, Fang Z, Guo K. C- to N-Center Remote Heteroaryl Migration via Electrochemical Initiation of N Radical by Organic Catalyst. Org Lett 2020; 22:795-799. [PMID: 31922422 DOI: 10.1021/acs.orglett.9b04141] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Herein an exogenous oxidant- and metal-free electrochemical heteroaryl migration triggered by N radicals to construct new N-C bonds was developed. This methodology features a high atom economy and utilization rate of energy, and it is insensitive to water and air. Moreover, a user-friendly undivided cell was employed. The use of an organic catalyst makes it more efficient, green, and practical.
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Affiliation(s)
- Chengkou Liu
- College of Biotechnology and Pharmaceutical Engineering , Nanjing Tech University , Nanjing 211816 , China
| | - Qiang Jiang
- College of Biotechnology and Pharmaceutical Engineering , Nanjing Tech University , Nanjing 211816 , China
| | - Yang Lin
- College of Biotechnology and Pharmaceutical Engineering , Nanjing Tech University , Nanjing 211816 , China
| | - Zheng Fang
- College of Biotechnology and Pharmaceutical Engineering , Nanjing Tech University , Nanjing 211816 , China
| | - Kai Guo
- College of Biotechnology and Pharmaceutical Engineering , Nanjing Tech University , Nanjing 211816 , China.,State Key Laboratory of Materials-Oriented Chemical Engineering , Nanjing Tech University , Nanjing 211816 , China
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27
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Jiang H, Seidler G, Studer A. Carboamination of Unactivated Alkenes through Three-Component Radical Conjugate Addition. Angew Chem Int Ed Engl 2019; 58:16528-16532. [PMID: 31529676 PMCID: PMC6900080 DOI: 10.1002/anie.201910926] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Indexed: 01/24/2023]
Abstract
Two-component Giese type radical additions are highly practical and established reactions. Herein, three-component radical conjugate additions of unactivated alkenes to Michael acceptors are reported. Amidyl radicals, oxidatively generated from α-amido oxy acids using redox catalysis, act as the third reaction component which add to the unactivated alkenes. The adduct radicals engage in Giese type additions to Michael acceptors to provide, after reduction, the three-component products in an overall alkene carboamination reaction. Transformations which can be conducted under practical mild conditions feature high functional group tolerance and broad substrate scope.
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Affiliation(s)
- Heng Jiang
- Organisch-Chemisches InstitutWestfälische Wilhelms-UniversitätCorrensstraß 4048149MünsterGermany
| | - Gesa Seidler
- Organisch-Chemisches InstitutWestfälische Wilhelms-UniversitätCorrensstraß 4048149MünsterGermany
| | - Armido Studer
- Organisch-Chemisches InstitutWestfälische Wilhelms-UniversitätCorrensstraß 4048149MünsterGermany
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28
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Jiang H, Seidler G, Studer A. Carboamination of Unactivated Alkenes through Three‐Component Radical Conjugate Addition. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201910926] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Heng Jiang
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Corrensstraß 40 48149 Münster Germany
| | - Gesa Seidler
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Corrensstraß 40 48149 Münster Germany
| | - Armido Studer
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Corrensstraß 40 48149 Münster Germany
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29
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Gan H. S
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‐Mediated Cyclization of 2‐Hydroxy/Amino anilines with Arylacetylene: Approach to Benzoxazoles and Benzimidazoles. ChemistrySelect 2019. [DOI: 10.1002/slct.201902349] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Haifeng Gan
- College of Biotechnology and Pharmaceutical EngineeringNanjing Tech University, Nanjing, Jiangsu 211800 P. R. China
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30
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Jiang H, Studer A. Anti‐Markovnikov Radical Hydro‐ and Deuteroamidation of Unactivated Alkenes. Chemistry 2019; 25:7105-7109. [DOI: 10.1002/chem.201901566] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Indexed: 12/31/2022]
Affiliation(s)
- Heng Jiang
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Corrensstraße 40 48149 Münster Germany
| | - Armido Studer
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Corrensstraße 40 48149 Münster Germany
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31
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Jiang H, Studer A. Chemistry With N-Centered Radicals Generated by Single-Electron Transfer-Oxidation Using Photoredox Catalysis. CCS CHEMISTRY 2019. [DOI: 10.31635/ccschem.019.20180026] [Citation(s) in RCA: 138] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
This review covers the recent literature on oxidative generation of N-centered radicals using photoredox catalysis. The concept of proton-coupled electron transfer is briefly discussed. Applications of such reactive N-centered radicals in cascade processes comprising arene amidation, alkene amidation, C—C bond cleavage reactions, and remote C—H functionalization are addressed. In addition, novel reagents allowing for clean oxidative N-radical generation are discussed.
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32
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Guo J, Huang GB, Wu QL, Xie Y, Weng J, Lu G. An efficient approach to access 1,1,2-triarylethanes enabled by the organo-photoredox-catalyzed decarboxylative addition reaction. Org Chem Front 2019. [DOI: 10.1039/c9qo00380k] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient approach to access 1,1,2-triarylethanes enabled by organo-photoredox-catalyzed decarboxylative 1,6-conjugate addition of carboxylic acids to p-QMs.
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Affiliation(s)
- Jing Guo
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Gong-Bin Huang
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Qiao-Lei Wu
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Ying Xie
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Jiang Weng
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
| | - Gui Lu
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation
- School of Pharmaceutical Sciences
- Sun Yat-sen University
- Guangzhou 510006
- P. R. China
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33
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Jiang H, Studer A. Transition-Metal-Free Three-Component Radical 1,2-Amidoalkynylation of Unactivated Alkenes. Chemistry 2018; 25:516-520. [PMID: 30403422 DOI: 10.1002/chem.201805490] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Indexed: 11/10/2022]
Abstract
A transition-metal-free radical 1,2-amidoalkynylation of unactivated alkenes is presented. α-Amido-oxy acids were used as amidyl radical precursors, which were oxidized by an organic photoredox catalyst (4CzlPN). The electrophilic N-radicals chemoselectively reacted with various aliphatic alkenes and the adduct radicals were then trapped by ethynylbenziodoxolone (EBX) reagents to eventually provide the amidoalkynylation products. These transformations, which were conducted under practical and mild conditions, showed high functional group tolerance and broad substrate scope. Mechanistic studies supported the radical nature of these cascades.
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Affiliation(s)
- Heng Jiang
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstraß 40, 48149, Münster, Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstraß 40, 48149, Münster, Germany
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34
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An XD, Zhang H, Xu Q, Yu L, Yu S. Stereodivergent Synthesis of α-Aminomethyl Cinnamyl Ethers via
Photoredox-Catalyzed Radical Relay Reaction. CHINESE J CHEM 2018. [DOI: 10.1002/cjoc.201800387] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xiao-De An
- State Key Laboratory of Analytical Chemistry for Life Science, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University; Nanjing 210023 China
| | - Hao Zhang
- Guangling College, School of Chemistry and Chemical Engineering, Yangzhou University; Yangzhou Jiangsu 225002 China
| | - Qing Xu
- Guangling College, School of Chemistry and Chemical Engineering, Yangzhou University; Yangzhou Jiangsu 225002 China
| | - Lei Yu
- Guangling College, School of Chemistry and Chemical Engineering, Yangzhou University; Yangzhou Jiangsu 225002 China
| | - Shouyun Yu
- State Key Laboratory of Analytical Chemistry for Life Science, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University; Nanjing 210023 China
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35
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Chen H, Guo L, Yu S. Primary, Secondary, and Tertiary γ-C(sp3)–H Vinylation of Amides via Organic Photoredox-Catalyzed Hydrogen Atom Transfer. Org Lett 2018; 20:6255-6259. [DOI: 10.1021/acs.orglett.8b02737] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Hui Chen
- State Key Laboratory of Analytical Chemistry for Life Science, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Liangliang Guo
- State Key Laboratory of Analytical Chemistry for Life Science, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Shouyun Yu
- State Key Laboratory of Analytical Chemistry for Life Science, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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36
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Guo J, Wu QL, Xie Y, Weng J, Lu G. Visible-Light-Mediated Decarboxylative Benzylation of Imines with Arylacetic Acids. J Org Chem 2018; 83:12559-12567. [DOI: 10.1021/acs.joc.8b01849] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jing Guo
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Qiao-Lei Wu
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Ying Xie
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Jiang Weng
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
| | - Gui Lu
- Guangdong Provincial Key Laboratory of New Drug Design and Evaluation, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
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37
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Jiang H, Studer A. Amidyl Radicals by Oxidation of α‐Amido‐oxy Acids: Transition‐Metal‐Free Amidofluorination of Unactivated Alkenes. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804966] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Heng Jiang
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Corrensstraße 40 48149 Münster Germany
| | - Armido Studer
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Corrensstraße 40 48149 Münster Germany
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38
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Choi JH, Park CM. Three-Component Synthesis of Quinolines Based on Radical Cascade Visible-Light Photoredox Catalysis. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800734] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jun-Ho Choi
- Department of Chemistry; UNIST (Ulsan National Institute of Science and Technology); Ulsan 44919 Republic of Korea
| | - Cheol-Min Park
- Department of Chemistry; UNIST (Ulsan National Institute of Science and Technology); Ulsan 44919 Republic of Korea
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39
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Davies J, Morcillo SP, Douglas JJ, Leonori D. Hydroxylamine Derivatives as Nitrogen-Radical Precursors in Visible-Light Photochemistry. Chemistry 2018; 24:12154-12163. [PMID: 29787627 DOI: 10.1002/chem.201801655] [Citation(s) in RCA: 185] [Impact Index Per Article: 30.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Indexed: 11/08/2022]
Abstract
In recent years, hydroxylamines derivatives have been exploited as nitrogen-radical precursors in visible-light photochemistry. Their ability to serve as electrophores in redox chemistry has propelled the development of many novel transformations. Fundamental mechanistic aspects as well as the importance in the preparation of nitrogen-containing molecules will be highlighted.
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Affiliation(s)
- Jacob Davies
- School of Chemistry, University of Manchester, Oxford Road, M13 9PL, Manchester, UK
| | - Sara P Morcillo
- School of Chemistry, University of Manchester, Oxford Road, M13 9PL, Manchester, UK
| | - James J Douglas
- Early Chemical Development, Pharmaceutical Sciences, IMED Biotech Unit, AstraZeneca, Macclesfield, SK10 2NA, UK
| | - Daniele Leonori
- School of Chemistry, University of Manchester, Oxford Road, M13 9PL, Manchester, UK
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40
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Jiang H, Studer A. Amidyl Radicals by Oxidation of α-Amido-oxy Acids: Transition-Metal-Free Amidofluorination of Unactivated Alkenes. Angew Chem Int Ed Engl 2018; 57:10707-10711. [PMID: 29855130 DOI: 10.1002/anie.201804966] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2018] [Revised: 05/28/2018] [Indexed: 01/23/2023]
Abstract
A three-component transition-metal-free amidofluorination of unactivated alkenes and styrenes is presented. α-Amido-oxy acids are introduced as efficient and easily accessible amidyl radical precursors that are oxidized by a photoexcited organic sensitizer (Mes-Acr-Me) to the corresponding carboxyl radical. Sequential CO2 and aldehyde/ketone fragmentation leads to an N-centered radical that adds to an alkene. Commercial Selectfluor is used to trap the adduct radical through fluorine-atom transfer. The transformation features by high functional-group tolerance, broad substrate scope, and practical mild conditions. Mechanistic studies support the radical nature of the cascade.
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Affiliation(s)
- Heng Jiang
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstraße 40, 48149, Münster, Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstraße 40, 48149, Münster, Germany
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41
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Zhu XT, Zhang TS, Zhao Q, Cai PJ, Hao WJ, Tu SJ, Jiang B. Sulfinate-Salt-Mediated Radical Relay Cyclization of Cyclic Ethers with 2-Alkynylbenzonitriles toward 3-Alkylated 1-Indenones. Chem Asian J 2018. [DOI: 10.1002/asia.201800211] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Xiao-Tong Zhu
- School of Chemical Engineering & Technology; China University of Mining and Technology; Xuzhou 221116 P. R. China
- Department of Chemistry; Xuzhou Medical University; Xuzhou 221004 P. R. China
- School of Chemistry and Materials Science; Jiangsu Normal University; Xuzhou 221116 P. R. China
| | - Tian-Shu Zhang
- School of Chemical Engineering & Technology; China University of Mining and Technology; Xuzhou 221116 P. R. China
| | - Qi Zhao
- School of Chemistry and Materials Science; Jiangsu Normal University; Xuzhou 221116 P. R. China
| | - Pei-Jun Cai
- School of Chemical Engineering & Technology; China University of Mining and Technology; Xuzhou 221116 P. R. China
| | - Wen-Juan Hao
- School of Chemistry and Materials Science; Jiangsu Normal University; Xuzhou 221116 P. R. China
| | - Shu-Jiang Tu
- School of Chemistry and Materials Science; Jiangsu Normal University; Xuzhou 221116 P. R. China
| | - Bo Jiang
- School of Chemistry and Materials Science; Jiangsu Normal University; Xuzhou 221116 P. R. China
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42
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He BQ, Yu XY, Wang PZ, Chen JR, Xiao WJ. A photoredox catalyzed iminyl radical-triggered C–C bond cleavage/addition/Kornblum oxidation cascade of oxime esters and styrenes: synthesis of ketonitriles. Chem Commun (Camb) 2018; 54:12262-12265. [DOI: 10.1039/c8cc07072e] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A photoredox-catalyzed iminyl radical-triggered C–C bond cleavage/addition/Kornblum oxidation cascade of cycloketone oxime esters and styrenes in DMSO is described for the first time.
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Affiliation(s)
- Bin-Qing He
- CCNU-uOttawa Joint Research Centre
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education
- College of Chemistry
- Central China Normal University
| | - Xiao-Ye Yu
- CCNU-uOttawa Joint Research Centre
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education
- College of Chemistry
- Central China Normal University
| | - Peng-Zi Wang
- CCNU-uOttawa Joint Research Centre
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education
- College of Chemistry
- Central China Normal University
| | - Jia-Rong Chen
- CCNU-uOttawa Joint Research Centre
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education
- College of Chemistry
- Central China Normal University
| | - Wen-Jing Xiao
- CCNU-uOttawa Joint Research Centre
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education
- College of Chemistry
- Central China Normal University
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43
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Wang CM, Song D, Xia PJ, Ye ZP, Xiao JA, Xiang HY, Chen XQ, Yang H. Photoredox-catalyzed direct aminoalkylation of isatins: diastereoselective access to 3-hydroxy-3-aminoalkylindolin-2-ones analogues. Org Chem Front 2018. [DOI: 10.1039/c8qo00201k] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A practical protocol for the direct aminoalkylation of isatins with tetrahydroisoquinolines and other aminesviaa photoredox catalyzed radical–radical cross-coupling process is described.
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Affiliation(s)
- Chao-Ming Wang
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- P. R. China
| | - Dan Song
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- P. R. China
| | - Peng-Ju Xia
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- P. R. China
| | - Zhi-Peng Ye
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- P. R. China
| | - Jun-An Xiao
- College of Chemistry and Materials Science
- Guangxi Teachers Education University
- Nanning
- P. R. China
| | - Hao-Yue Xiang
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- P. R. China
| | - Xiao-Qing Chen
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- P. R. China
| | - Hua Yang
- College of Chemistry and Chemical Engineering
- Central South University
- Changsha 410083
- P. R. China
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