201
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Betori RC, McDonald BR, Scheidt KA. Reductive annulations of arylidene malonates with unsaturated electrophiles using photoredox/Lewis acid cooperative catalysis. Chem Sci 2019; 10:3353-3359. [PMID: 30996923 PMCID: PMC6430011 DOI: 10.1039/c9sc00302a] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Accepted: 02/03/2019] [Indexed: 01/18/2023] Open
Abstract
A cooperative Lewis acid/photocatalytic reduction of salicylaldehyde-derived arylidene malonates provides access to a versatile, stabilized radical anion enolate. Using these unusual umpolung operators, we have developed a novel route to access densely functionalized carbo- and heterocycles through a radical annulation addition pathway.
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Affiliation(s)
- Rick C Betori
- Department of Chemistry , Center for Molecular Innovation and Drug Discovery , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , USA .
| | - Benjamin R McDonald
- Department of Chemistry , Center for Molecular Innovation and Drug Discovery , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , USA .
| | - Karl A Scheidt
- Department of Chemistry , Center for Molecular Innovation and Drug Discovery , Northwestern University , 2145 Sheridan Road , Evanston , Illinois 60208 , USA .
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202
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Shida N, Imada Y, Nagahara S, Okada Y, Chiba K. Interplay of arene radical cations with anions and fluorinated alcohols in hole catalysis. Commun Chem 2019. [DOI: 10.1038/s42004-019-0125-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
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203
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Tan JSJ, Paton RS. Frontier molecular orbital effects control the hole-catalyzed racemization of atropisomeric biaryls. Chem Sci 2019; 10:2285-2289. [PMID: 30931095 PMCID: PMC6399675 DOI: 10.1039/c8sc05066j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Accepted: 12/17/2018] [Indexed: 01/09/2023] Open
Abstract
Atropisomeric biaryl systems are privileged architectures used in asymmetric synthesis and pharmaceutical structures. We report that by simply removing a single-electron, the resistance of biaryls towards racemization is reduced dramatically. Even though the steric properties are unaltered, biaryl oxidation changes atropisomerization into a two step mechanism with considerably smaller activation barriers than closed-shell biaryls. The effect is general for a series of biaryls and helicenes studied and results from the dependence of frontier molecular orbital energies on biaryl conformation.
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Affiliation(s)
- Jacqueline S J Tan
- Chemistry Research Laboratory , University of Oxford , 12 Mansfield Road , Oxford , OX1 3TA , UK
| | - Robert S Paton
- Department of Chemistry , Colorado State University , Fort Collins , CO 80523 , USA . http://www.patonlab.com ;
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204
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Syroeshkin MA, Kuriakose F, Saverina EA, Timofeeva VA, Egorov MP, Alabugin IV. Hochkonversion von Reduktionsmitteln. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201807247] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Mikhail A. Syroeshkin
- N. D. Zelinsky Institute of Organic Chemistry Leninskyprosp. 47 119991 Moskau Russland
| | - Febin Kuriakose
- Department of Chemistry and Biochemistry Florida State University Tallahassee FL USA
| | - Evgeniya A. Saverina
- N. D. Zelinsky Institute of Organic Chemistry Leninskyprosp. 47 119991 Moskau Russland
- UMR CNRS 6226 ISCR University of Rennes 1 Rennes Frankreich
| | | | - Mikhail P. Egorov
- N. D. Zelinsky Institute of Organic Chemistry Leninskyprosp. 47 119991 Moskau Russland
| | - Igor V. Alabugin
- Department of Chemistry and Biochemistry Florida State University Tallahassee FL USA
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205
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Syroeshkin MA, Kuriakose F, Saverina EA, Timofeeva VA, Egorov MP, Alabugin IV. Upconversion of Reductants. Angew Chem Int Ed Engl 2019; 58:5532-5550. [DOI: 10.1002/anie.201807247] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Mikhail A. Syroeshkin
- N. D. Zelinsky Institute of Organic Chemistry Leninsky prosp. 47 119991 Moscow Russia
| | - Febin Kuriakose
- Department of Chemistry and Biochemistry Florida State University Tallahassee FL USA
| | - Evgeniya A. Saverina
- N. D. Zelinsky Institute of Organic Chemistry Leninsky prosp. 47 119991 Moscow Russia
- UMR CNRS 6226 ISCR University of Rennes 1 Rennes France
| | | | - Mikhail P. Egorov
- N. D. Zelinsky Institute of Organic Chemistry Leninsky prosp. 47 119991 Moscow Russia
| | - Igor V. Alabugin
- Department of Chemistry and Biochemistry Florida State University Tallahassee FL USA
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206
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Li Y, Ma F, Li P, Miao T, Wang L. Hydrogen and Sulfonyl Radical Generation for the Hydrogenation and Arylsulfonylation of Alkenes Driven by Photochemical Activity of Hydrogen Bond Donor‐Acceptor Complexes. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801521] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Yang Li
- Department of ChemistryHuaibei Normal University, Huaibei Anhui 235000 People's Republic of China
| | - Fang Ma
- Department of ChemistryHuaibei Normal University, Huaibei Anhui 235000 People's Republic of China
| | - Pinhua Li
- Department of ChemistryHuaibei Normal University, Huaibei Anhui 235000 People's Republic of China
| | - Tao Miao
- Department of ChemistryHuaibei Normal University, Huaibei Anhui 235000 People's Republic of China
| | - Lei Wang
- Department of ChemistryHuaibei Normal University, Huaibei Anhui 235000 People's Republic of China
- State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic Chemistry Shanghai 200032 People's Republic of China
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207
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Chuentragool P, Yadagiri D, Morita T, Sarkar S, Parasram M, Wang Y, Gevorgyan V. Aliphatic Radical Relay Heck Reaction at Unactivated C(sp 3 )-H Sites of Alcohols. Angew Chem Int Ed Engl 2019; 58:1794-1798. [PMID: 30462879 PMCID: PMC6359925 DOI: 10.1002/anie.201812398] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 11/20/2018] [Indexed: 12/17/2022]
Abstract
The Mizoroki-Heck reaction is one of the most efficient methods for alkenylation of aryl, vinyl, and alkyl halides. Given its innate nature, this protocol requires the employment of compounds possessing a halogen atom at the site of functionalization. However, the accessibility of organic molecules possessing a halogen atom at a particular site in aliphatic systems is extremely limited. Thus, a protocol that allows a Heck reaction to occur at a specific nonfunctionalized C(sp3 )-H site is desirable. Reported here is a radical relay Heck reaction which allows selective remote alkenylation of aliphatic alcohols at unactivated β-, γ-, and δ-C(sp3 )-H sites. The use of an easily installed/removed Si-based auxiliary enables selective I-atom/radical translocation events at remote C-H sites followed by the Heck reaction. Notably, the reaction proceeds smoothly under mild visible-light-mediated conditions at room temperature, producing highly modifiable and valuable alkenol products from readily available alcohols feedstocks.
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Affiliation(s)
- Padon Chuentragool
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Rm. 4500, Chicago, IL 60607 (USA)
| | - Dongari Yadagiri
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Rm. 4500, Chicago, IL 60607 (USA)
| | - Taiki Morita
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Rm. 4500, Chicago, IL 60607 (USA)
| | - Sumon Sarkar
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Rm. 4500, Chicago, IL 60607 (USA)
| | - Marvin Parasram
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Rm. 4500, Chicago, IL 60607 (USA)
| | - Yang Wang
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Rm. 4500, Chicago, IL 60607 (USA)
| | - Vladimir Gevorgyan
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Rm. 4500, Chicago, IL 60607 (USA)
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208
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Lee YM, Kim S, Ohkubo K, Kim KH, Nam W, Fukuzumi S. Unified Mechanism of Oxygen Atom Transfer and Hydrogen Atom Transfer Reactions with a Triflic Acid-Bound Nonheme Manganese(IV)-Oxo Complex via Outer-Sphere Electron Transfer. J Am Chem Soc 2019; 141:2614-2622. [PMID: 30646680 DOI: 10.1021/jacs.8b12935] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Outer-sphere electron transfer from styrene, thioanisole, and toluene derivatives to a triflic acid (HOTf)-bound nonheme Mn(IV)-oxo complex, [(N4Py)MnIV(O)]2+-(HOTf)2 (N4Py = N, N-bis(2-pyridylmethyl)- N-bis(2-pyridyl)methylamine), has been shown to be the rate-determining step of different types of redox reactions such as epoxidation, sulfoxidation, and hydroxylation of styrene, thioanisole, and toluene derivatives, respectively, by [(N4Py)MnIV(O)]2+-(HOTf)2. The rate constants of HOTf-promoted epoxidation of all styrene derivatives with [(N4Py)MnIV(O)]2+ and electron transfer from electron donors to [(N4Py)MnV(O)]2+ exhibit a remarkably unified correlation with the driving force of outer-sphere electron transfer in light of the Marcus theory of electron transfer. The same electron-transfer driving force dependence is observed in the oxygen atom transfer from [(N4Py)MnIV(O)]2+-(HOTf)2 to thioanisole derivatives as well as in the hydrogen atom transfer from toluene derivatives to [(N4Py)MnIV(O)]2+-(HOTf)2. Thus, mechanisms of oxygen atom transfer (epoxidation and sulfoxidation) reactions of styrene and thioanisole derivatives and hydrogen atom transfer (hydroxylation) reactions of toluene derivatives by [(N4Py)MnIV(O)]2+-(HOTf)2 have been unified for the first time as the same reaction pathway via outer-sphere electron transfer, followed by the fast bond-forming step, which exhibits the singly unified electron-transfer driving force dependence of the rate constants as outer-sphere electron-transfer reactions. In the case of the epoxidation of cis-stilbene by [(N4Py)MnIV(O)]2+-(HOTf)2, the isomerization of cis-stilbene radical cation to trans-stilbene radical cation occurs after outer-sphere electron transfer from cis-stilbene to [(N4Py)MnIV(O)]2+-(HOTf)2 to yield trans-stilbene oxide selectively, which is also taken as evidence for the occurrence of electron transfer in the acid-catalyzed epoxidation.
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Affiliation(s)
- Yong-Min Lee
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea
| | - Surin Kim
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea
| | - Kei Ohkubo
- Institute for Advanced Co-Creation Studies, Open and Transdisciplinary Research Initiatives , Osaka University , Suita , Osaka 565-0871 , Japan
| | - Kyung-Ha Kim
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea
| | - Wonwoo Nam
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea.,State Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences , Lanzhou 730000 , China
| | - Shunichi Fukuzumi
- Department of Chemistry and Nano Science , Ewha Womans University , Seoul 03760 , Korea.,Faculty of Science and Engineering , Meijo University , SENTAN, Japan Science and Technology Agency (JST), Nagoya , Aichi 468-0073 , Japan
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209
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Zheng M, Li G, Lu H. Photoredox- or Metal-Catalyzed in Situ SO2-Capture Reactions: Synthesis of β-Ketosulfones and Allylsulfones. Org Lett 2019; 21:1216-1220. [DOI: 10.1021/acs.orglett.9b00201] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Min Zheng
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
| | - Guigen Li
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, United States
| | - Hongjian Lu
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China
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210
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211
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Morack T, Mück‐Lichtenfeld C, Gilmour R. Bioinspired Radical Stetter Reaction: Radical Umpolung Enabled by Ion‐Pair Photocatalysis. Angew Chem Int Ed Engl 2019; 58:1208-1212. [DOI: 10.1002/anie.201809601] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 11/12/2018] [Indexed: 01/01/2023]
Affiliation(s)
- Tobias Morack
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Germany
| | - Christian Mück‐Lichtenfeld
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Germany
| | - Ryan Gilmour
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Germany
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212
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Yang T, Xia WJ, Shang JQ, Li Y, Wang XX, Sun M, Li YM. Metal-Free Radical [2 + 2 + 1] Cyclization of ortho-Cyanoarylacrylamides with Alkyl Nitriles: Synthesis of Pyrrolo[3,2- c]quinolines. Org Lett 2019; 21:444-447. [PMID: 30588816 DOI: 10.1021/acs.orglett.8b03638] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A novel radical [2 + 2 + 1] cyclization of ortho-cyanoarylacrylamides with dual α-C-H bonds in alkyl nitriles has been developed. The reaction provides new facile and straightforward access to cyano-substituted pyrrolo[3,2- c]quinolines, which are important nitrogen-containing polyheterocycles. A possible mechanism for the transformation is proposed.
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Affiliation(s)
- Tao Yang
- Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming 650500 , China
| | - Wen-Jin Xia
- Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming 650500 , China
| | - Jia-Qi Shang
- Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming 650500 , China
| | - Yi Li
- Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming 650500 , China
| | - Xiang-Xiang Wang
- Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming 650500 , China
| | - Meng Sun
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of Ministry of Education, Department of Chemistry & Materials Science , Northwest University , Xi'an 710127 , China
| | - Ya-Min Li
- Faculty of Life Science and Technology , Kunming University of Science and Technology , Kunming 650500 , China
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213
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Chuentragool P, Yadagiri D, Morita T, Sarkar S, Parasram M, Wang Y, Gevorgyan V. Aliphatic Radical Relay Heck Reaction at Unactivated C(sp
3
)−H Sites of Alcohols. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201812398] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Padon Chuentragool
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St., Rm. 4500 Chicago IL 60607 USA
| | - Dongari Yadagiri
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St., Rm. 4500 Chicago IL 60607 USA
| | - Taiki Morita
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St., Rm. 4500 Chicago IL 60607 USA
| | - Sumon Sarkar
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St., Rm. 4500 Chicago IL 60607 USA
| | - Marvin Parasram
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St., Rm. 4500 Chicago IL 60607 USA
| | - Yang Wang
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St., Rm. 4500 Chicago IL 60607 USA
| | - Vladimir Gevorgyan
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor St., Rm. 4500 Chicago IL 60607 USA
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214
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Zheng D, Studer A. Photoinitiated Three-Component α-Perfluoroalkyl-β-heteroarylation of Unactivated Alkenes via Electron Catalysis. Org Lett 2019; 21:325-329. [PMID: 30576162 PMCID: PMC6326532 DOI: 10.1021/acs.orglett.8b03849] [Citation(s) in RCA: 104] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Indexed: 01/01/2023]
Abstract
A visible-light-initiated α-perfluoroalkyl-β-heteroarylation of various alkenes with perfluoroalkyl iodides and quinoxalin-2(1 H)-ones is presented. This three-component radical cascade reaction allows an efficient synthesis of a range of perfluoroalkyl containing quinoxalin-2(1 H)-one derivatives in moderate to excellent yields under mild conditions. Reactions proceed via acidic aminyl radicals that are readily deprotonated to give the corresponding radical anions able to sustain the radical chain as single electron transfer reducing reagents. Hence, the overall cascade classifies as an electron-catalyzed process.
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Affiliation(s)
- Danqing Zheng
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstraβe 40, 48149 Münster, Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstraβe 40, 48149 Münster, Germany
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215
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Peng X, Zen Y, Liu Q, Liu L, Wang H. Graphene oxide as a green carbon material for cross-coupling of indoles with ethers via oxidation and the Friedel–Crafts reaction. Org Chem Front 2019. [DOI: 10.1039/c9qo00926d] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first example of using GO as a carbon material facilitated C(sp2)–C(sp3) bond formation.
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Affiliation(s)
- Xiangjun Peng
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University
- Guilin 541004
- P. R. China
- School of Pharmaceutical Science
| | - Yong Zen
- School of Pharmaceutical Science
- Gannan Medical University
- Ganzhou
- P. R. China
| | - Qian Liu
- School of Pharmaceutical Science
- Gannan Medical University
- Ganzhou
- P. R. China
| | - Liangxian Liu
- School of Pharmaceutical Science
- Gannan Medical University
- Ganzhou
- P. R. China
- Department of Chemistry and Chemical Engineering
| | - Hengshan Wang
- State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources
- School of Chemistry and Pharmaceutical Sciences of Guangxi Normal University
- Guilin 541004
- P. R. China
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216
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Zhang W, Zheng HL, Liu Y, Yu A, Yang C, Li X, Cheng JP. Catalyst-free amination of α-cyanoarylacetates enabled by single-electron transfer. Org Chem Front 2019. [DOI: 10.1039/c9qo00346k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A radical benzylic amination of α-cyanoarylacetates without the assistance of any transition-metal catalysts or external photosensitizers was realized.
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Affiliation(s)
- Wei Zhang
- State Key Laboratory of Elemento-organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Han-Liang Zheng
- State Key Laboratory of Elemento-organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Yang Liu
- State Key Laboratory of Elemento-organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Ao Yu
- Central Laboratory
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Chen Yang
- State Key Laboratory of Elemento-organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Xin Li
- State Key Laboratory of Elemento-organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Jin-Pei Cheng
- State Key Laboratory of Elemento-organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
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217
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Schmalzbauer M, Ghosh I, König B. Utilising excited state organic anions for photoredox catalysis: activation of (hetero)aryl chlorides by visible light-absorbing 9-anthrolate anions. Faraday Discuss 2019; 215:364-378. [DOI: 10.1039/c8fd00176f] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
A novel photocatalytic concept based on photoexcitation of an organic anionic ground state catalyst for direct C–H (het)arylations using (het)aryl chlorides.
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Affiliation(s)
- Matthias Schmalzbauer
- Institut für Organische Chemie
- Universität Regensburg
- Universitätsstraße 31
- Regensburg
- Germany
| | - Indrajit Ghosh
- Institut für Organische Chemie
- Universität Regensburg
- Universitätsstraße 31
- Regensburg
- Germany
| | - Burkhard König
- Institut für Organische Chemie
- Universität Regensburg
- Universitätsstraße 31
- Regensburg
- Germany
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218
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Zhou ZZ, Zhao JH, Gou XY, Chen XM, Liang YM. Visible-light-mediated hydrodehalogenation and Br/D exchange of inactivated aryl and alkyl halides with a palladium complex. Org Chem Front 2019. [DOI: 10.1039/c9qo00240e] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Photo-induced radical reductive dehalogenation of inactivated aryl/alkyl bromides and chlorides with a palladium complex is described. Reductive cyclization, dehalogenative deuteration, and radical addition process can be achieved smoothly.
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Affiliation(s)
- Zhao-Zhao Zhou
- School of Nuclear Science and Technology, Lanzhou University
- Lanzhou, 730000
- P.R. China
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
| | - Jia-Hui Zhao
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou, 730000
- P.R. China
| | - Xue-Ya Gou
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou, 730000
- P.R. China
| | - Xi-Meng Chen
- School of Nuclear Science and Technology, Lanzhou University
- Lanzhou, 730000
- P.R. China
| | - Yong-Min Liang
- State Key Laboratory of Applied Organic Chemistry
- Lanzhou University
- Lanzhou, 730000
- P.R. China
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219
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Zhang X, Liu MX, Wang TL, Wang YQ, Wang XC, Quan ZJ. A free-radical-promoted stereospecific denitro silylation of β-nitroalkenes with silanes. Org Chem Front 2019. [DOI: 10.1039/c9qo00819e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A novel Cu-promoted approach for the stereospecific synthesis of (E)-vinylsilanes through the denitro C–Si coupling reaction of β-nitroalkenes with silanes.
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Affiliation(s)
- Xi Zhang
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials; College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- People's Republic of China
| | - Ming-Xia Liu
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials; College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- People's Republic of China
| | - Tong-Lin Wang
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials; College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- People's Republic of China
| | - Yong-Qing Wang
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials; College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- People's Republic of China
| | - Xi-Cun Wang
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials; College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- People's Republic of China
| | - Zheng-Jun Quan
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials; College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- People's Republic of China
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220
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Ghosh S, Kumar G, Naveen N, Pradhan S, Chatterjee I. EDA complex directed N-centred radical generation from nitrosoarenes: a divergent synthetic approach. Chem Commun (Camb) 2019; 55:13590-13593. [DOI: 10.1039/c9cc07277b] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
N-Centred radicals generated via the formation of EDA complexes are added to electron-deficient allylsulfones to produce isoxazolidines, aziridines or β-amino acid derivatives.
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Affiliation(s)
- Soumen Ghosh
- Department of Chemistry
- Indian Institute of Technology Ropar
- Rupnagar
- India
| | - Gautam Kumar
- Department of Chemistry
- Indian Institute of Technology Ropar
- Rupnagar
- India
| | - Naveen Naveen
- Department of Chemistry
- Indian Institute of Technology Ropar
- Rupnagar
- India
| | - Suman Pradhan
- Department of Chemistry
- Indian Institute of Technology Ropar
- Rupnagar
- India
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221
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Ziarati A, Badiei A, Luque R. Engineered bi-functional hydrophilic/hydrophobic yolk@shell architectures: A rational strategy for non-time dependent ultra selective photocatalytic oxidation. APPLIED CATALYSIS B: ENVIRONMENTAL 2019; 240:72-78. [DOI: 10.1016/j.apcatb.2018.08.058] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
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222
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Felpin FX, Sengupta S. Biaryl synthesis with arenediazonium salts: cross-coupling, CH-arylation and annulation reactions. Chem Soc Rev 2019; 48:1150-1193. [PMID: 30608075 DOI: 10.1039/c8cs00453f] [Citation(s) in RCA: 120] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The rich legacy of arenediazonium salts in the synthesis of unsymmetrical biaryls, built around the seminal works of Pschorr, Gomberg and Bachmann more than a century ago, continues to make important contributions at various evolutionary stages of modern biaryl synthesis. Based on in-depth mechanistic analysis and design of novel pathways and reaction conditions, the scope of biaryl synthesis with arenediazonium salts has enormously expanded in recent years through applications of transition metal/photoredox-catalysed cross-coupling, thermal/photosensitized radical chain CH-arylation of (hetero)arenes and arylative radical annulation reactions with alkynes. These recent developments have provided facile synthetic access to a wide variety of unsymmetrical biaryls of pharmaceutical, agrochemical and optoelectronic importance with green scale-up options and created opportunities for late-stage modification of peptides, nucleosides, carbon nanotubes and electrodes, the details of which are captured in this review.
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Affiliation(s)
- François-Xavier Felpin
- Université de Nantes, UFR des Sciences et des Techniques, CNRS UMR 6230, CEISAM, 2 rue de la Houssinière, 44322 Nantes Cedex 3, France. and Institut Universitaire de France, 1 rue Descartes, 75231 Paris Cedex 05, France
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223
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Okada Y. “Snapshots” of Intramolecular Electron Transfer in Redox Tag-Guided [2 + 2] Cycloadditions. J Org Chem 2018; 84:1882-1886. [DOI: 10.1021/acs.joc.8b02861] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yohei Okada
- Department of Chemical Engineering, Tokyo University of Agriculture and Technology, 2-24-16 Naka-cho, Koganei, Tokyo 184-8588, Japan
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224
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Deng W, Ye C, Li Y, Li D, Bao H. Iron-Catalyzed Oxyalkylation of Terminal Alkynes with Alkyl Iodides. Org Lett 2018; 21:261-265. [PMID: 30582704 DOI: 10.1021/acs.orglett.8b03689] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A general oxyalkylation of terminal alkynes enabled by iron catalysis has been developed. Primary and secondary alkyl iodides acted as the alkylating reagents and afforded a range of α-alkylated ketones under mild reaction conditions. Acetyl tert-butyl peroxide (TBPA) was used as the radical relay precursor, providing the initiated methyl radical to start the radical relay process. Preliminary mechanistic studies were conducted, and late-stage functionalizations of natural product derivatives were performed.
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Affiliation(s)
- Weili Deng
- Key Laboratory of Innate Immune Biology of Fujian Province, Biomedical Research Center of South China, College of Life Sciences , Fujian Normal University , 1 Keji Road , Fuzhou 350117 , P. R. China
| | - Changqing Ye
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis , Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , 155 Yangqiao Road West , Fuzhou , Fujian 350002 , P. R. of China
| | - Yajun Li
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis , Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , 155 Yangqiao Road West , Fuzhou , Fujian 350002 , P. R. of China
| | - Daliang Li
- Key Laboratory of Innate Immune Biology of Fujian Province, Biomedical Research Center of South China, College of Life Sciences , Fujian Normal University , 1 Keji Road , Fuzhou 350117 , P. R. China
| | - Hongli Bao
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis , Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , 155 Yangqiao Road West , Fuzhou , Fujian 350002 , P. R. of China
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225
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Sun R, Qin Y, Ruccolo S, Schnedermann C, Costentin C, Nocera DG. Elucidation of a Redox-Mediated Reaction Cycle for Nickel-Catalyzed Cross Coupling. J Am Chem Soc 2018; 141:89-93. [DOI: 10.1021/jacs.8b11262] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rui Sun
- Department of Chemistry and Chemical Biology, Harvard University
, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Yangzhong Qin
- Department of Chemistry and Chemical Biology, Harvard University
, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Serge Ruccolo
- Department of Chemistry and Chemical Biology, Harvard University
, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Christoph Schnedermann
- Department of Chemistry and Chemical Biology, Harvard University
, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Cyrille Costentin
- Laboratoire d’Electrochimie Moléculaire, Unité Mixte de Recherche Université − CNRS No. 7591, Bâtiment Lavoisier, Université Paris Diderot, Sorbonne Paris Cité
, 15 rue Jean de Baïf, 75205 Paris Cedex 13, France
| | - Daniel G. Nocera
- Department of Chemistry and Chemical Biology, Harvard University
, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
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226
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Morack T, Mück‐Lichtenfeld C, Gilmour R. Bioinspirierte radikalische Stetter‐Reaktion: radikalische Umpolung, ermöglicht durch Ionenpaar‐Photokatalyse. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201809601] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Tobias Morack
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Christian Mück‐Lichtenfeld
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Ryan Gilmour
- Organisch Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
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227
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Singh B, Paira R, Biswas G, Shaw BK, Mandal SK. Graphene oxide-phenalenyl composite: transition metal-free recyclable and catalytic C-H functionalization. Chem Commun (Camb) 2018; 54:13220-13223. [PMID: 30406225 DOI: 10.1039/c8cc05941a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient route towards a heterogeneous transition metal-free catalytic C-H functionalization using a covalently linked graphene oxide-phenalenyl conjugate is described herein (28 examples, which include a core of some biologically relevant biaryl and hetero-biaryls). It is an environmentally benign, economical and heterogeneous platform, whose catalytic activity can easily be regenerated through a simple washing-drying technique and the catalytic activity can be retained even after 10 cycles.
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Affiliation(s)
- Bhagat Singh
- Department of Chemical Sciences, Indian Institute of Science Education and Research, Kolkata, Mohanpur-741246, India.
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228
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Cao X, Cai BG, Xu GY, Xuan J. Radical Addition/Cyclization Reaction of 2-Vinylanilines with Alkynes: Synthesis of Naphthalenes via Electron Catalysis. Chem Asian J 2018; 13:3855-3858. [DOI: 10.1002/asia.201801496] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 11/05/2018] [Indexed: 12/29/2022]
Affiliation(s)
- Xia Cao
- Department of Chemistry and Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials; Anhui University; Hefei Anhui 230601 China
| | - Bao-Gui Cai
- Department of Chemistry and Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials; Anhui University; Hefei Anhui 230601 China
| | - Guo-Yong Xu
- Institute of Physical Science and Information Technology; Anhui University; Hefei Anhui 230601 China
| | - Jun Xuan
- Department of Chemistry and Anhui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials; Anhui University; Hefei Anhui 230601 China
- Institute of Physical Science and Information Technology; Anhui University; Hefei Anhui 230601 China
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229
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Bugaenko DI, Dubrovina AA, Yurovskaya MA, Karchava AV. Synthesis of Indoles via Electron-Catalyzed Intramolecular C-N Bond Formation. Org Lett 2018; 20:7358-7362. [PMID: 30431287 DOI: 10.1021/acs.orglett.8b02784] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A new protocol for the preparation of N-substituted indole-3-carboxylates has been developed. The key C-N bond formation occurs under transition-metal-free conditions employing a t-BuOK/DMF system without special initiators or additives. Across a number of substrates, indoles were afforded in yields higher or comparable to those obtained under transition-metal-catalyzed conditions. While demonstrating high functional group tolerance, new conditions are particularly attractive for manufacturing halogenated indoles that cannot be made in a pure form using other metal-based catalytic methods.
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Affiliation(s)
- Dmitry I Bugaenko
- Department of Chemistry , Moscow State University , Moscow 119234 , Russia
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230
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Petzold D, Nitschke P, Brandl F, Scheidler V, Dick B, Gschwind RM, König B. Visible‐Light‐Mediated Liberation and In Situ Conversion of Fluorophosgene. Chemistry 2018; 25:361-366. [DOI: 10.1002/chem.201804603] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2018] [Indexed: 12/22/2022]
Affiliation(s)
- Daniel Petzold
- Institut für Organische ChemieUniversität Regensburg Universitätsstrasse 31 Germany
| | - Philipp Nitschke
- Institut für Organische ChemieUniversität Regensburg Universitätsstrasse 31 Germany
| | - Fabian Brandl
- Institut für Organische ChemieUniversität Regensburg Universitätsstrasse 31 Germany
| | - Veronica Scheidler
- Institut für Organische ChemieUniversität Regensburg Universitätsstrasse 31 Germany
| | - Bernhard Dick
- Institut für Organische ChemieUniversität Regensburg Universitätsstrasse 31 Germany
| | - Ruth M. Gschwind
- Institut für Organische ChemieUniversität Regensburg Universitätsstrasse 31 Germany
| | - Burkhard König
- Institut für Organische ChemieUniversität Regensburg Universitätsstrasse 31 Germany
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231
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Pitzer L, Sandfort F, Strieth‐Kalthoff F, Glorius F. Carbonyl‐Olefin‐Kreuzmetathese mittels Licht‐induzierter 1,3‐Diol‐Bildung‐ und Fragmentierungssequenz. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201810221] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Lena Pitzer
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Frederik Sandfort
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Felix Strieth‐Kalthoff
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
| | - Frank Glorius
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Corrensstraße 40 48149 Münster Deutschland
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232
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Ghonchepour E, Islami MR, Tikdari AM. Methyl Red as Organocatalyst for Arylation of Unactivated Benzene Derivatives with Aryl Halides. ChemistrySelect 2018. [DOI: 10.1002/slct.201802643] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ehsan Ghonchepour
- Department of Chemistry; Shahid Bahonar University of Kerman, 22 Bahman Avenue; 76169 Kerman Iran
| | - Mohammad Reza Islami
- Department of Chemistry; Shahid Bahonar University of Kerman, 22 Bahman Avenue; 76169 Kerman Iran
| | - Ahmad Momeni Tikdari
- Department of Chemistry; Shahid Bahonar University of Kerman, 22 Bahman Avenue; 76169 Kerman Iran
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233
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Pitzer L, Sandfort F, Strieth-Kalthoff F, Glorius F. Carbonyl-Olefin Cross-Metathesis Through a Visible-Light-Induced 1,3-Diol Formation and Fragmentation Sequence. Angew Chem Int Ed Engl 2018; 57:16219-16223. [PMID: 30253003 DOI: 10.1002/anie.201810221] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Indexed: 11/07/2022]
Abstract
A visible-light-mediated approach to carbonyl-olefin cross-metathesis is described. Photoinduced hole catalysis was used to promote the formation of 1,3-diols from aldehydes and styrenes, which were then readily fragmented under acidic conditions to form the cross-metathesis products. The use of 1,3-diols as intermediates, rather than the energetically more demanding oxetanes, provides a new, orthogonal mechanistic strategy for carbonyl-olefin cross-metathesis. Furthermore, this approach does not require any metals, ligands, or additives, and provides the products with high levels of E selectivity. A mechanistic rationale is provided and supported by both theoretical calculations and experiments. Additionally, a practical synthesis of a new acridinium-based photocatalyst, including full characterization, is presented.
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Affiliation(s)
- Lena Pitzer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
| | - Frederik Sandfort
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
| | - Felix Strieth-Kalthoff
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
| | - Frank Glorius
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149, Münster, Germany
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234
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Liang SX, Jia Z, Liu YJ, Zhang W, Wang W, Lu J, Zhang LC. Compelling Rejuvenated Catalytic Performance in Metallic Glasses. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1802764. [PMID: 30277608 DOI: 10.1002/adma.201802764] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 08/07/2018] [Indexed: 06/08/2023]
Abstract
Metallic glasses (MGs) with the metastable nature and random atomic packing structure have attracted large attention in the catalytic family due to their superior catalytic performance. In contrast, their crystalline counterparts are restricted by the highly ordered packing structure, fewer surface active sites, and crystallographic defects for catalytic activity. The uncertainty of the different catalytic mechanisms and the intrinsic characteristics correlated to MGs and their crystalline counterparts become a major impediment to promote their catalytic efficiencies and widespread applications. Herein, it is reported that the excellent catalytic behavior in Fe-based MGs goes through a detrimental effect with the partial crystallization, but receives a compelling rejuvenation in the full crystallization. Further investigation reveals that multiphase intermetallics with electric potential differences in fully crystallized alloys facilitate the formation of galvanic cells. More importantly, extensively reduced grain boundaries due to grain growth greatly weaken electron trapping and promote inner electron transportation. The relatively homogenous grain-boundary corrosion in the intermetallics contributes to well-separated phases after reaction, leading to refreshment of the surface active sites, thereby quickly activating hydrogen peroxide and rapidly degrading organic pollutants. The exploration of catalytic mechanisms in the crystalline counterparts of MGs provides significant insights into revolutionize novel catalysts.
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Affiliation(s)
- Shun-Xing Liang
- School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA, 6027, Australia
| | - Zhe Jia
- Department of Mechanical and Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 99907, China
| | - Yu-Jing Liu
- School of Mechanical and Chemical Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, Perth, WA, 6009, Australia
| | - Wenchang Zhang
- Environmental Protection Administration of Ji'an City, Ji'an, Jiangxi Province, 343000, China
| | - Weimin Wang
- School of Materials Science and Engineering, Shandong University, Jinan, Shandong Province, 250061, China
| | - Jian Lu
- Department of Mechanical and Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong, 99907, China
| | - Lai-Chang Zhang
- School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA, 6027, Australia
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235
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Walton JC. Reflex Carbocation Release from Covalent Molecules by Endogenous Free Radicals. ACS OMEGA 2018; 3:13290-13297. [PMID: 30411034 PMCID: PMC6217609 DOI: 10.1021/acsomega.8b02307] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 10/02/2018] [Indexed: 06/08/2023]
Abstract
Carbocations are pervasive in contemporary organic synthesis, so new and innocuous methods of making them are always desirable. A theoretical approach revealed that compounds in which radical generation takes place may release carbocations advantageously. The radical types and molecular substructures that promote this effect were identified. The best substructures were found to be 1,3-dicarbonyl compounds, particularly those based on the Meldrum's acid theme. Sulfate esters and dithiane rings could also be employed. Radicals generated on oxygen atoms or ethyne units were particularly effective. For these species, carbocation release could be reflex, that is, concurrent with radical generation. Only small radical enhancements were observed for release of lithium cations because of the ionic character of most of the precursors. Ethyne units could be incorporated as spacers between the radical center and the site of carbocation generation. Moreover, the enhancement was transmitted down polyethyne chains of at least six units.
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Affiliation(s)
- John C. Walton
- EaStCHEM School of Chemistry, University of St. Andrews, St. Andrews, Fife KY16 9ST, United Kingdom
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236
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Ratushnyy M, Kamenova M, Gevorgyan V. A mild light-induced cleavage of the S-O bond of aryl sulfonate esters enables efficient sulfonylation of vinylarenes. Chem Sci 2018; 9:7193-7197. [PMID: 30288238 PMCID: PMC6148202 DOI: 10.1039/c8sc02769b] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Accepted: 07/23/2018] [Indexed: 01/03/2023] Open
Abstract
A new mode of S-O bond activation has been discovered, which constitutes novel reactivity of easily available and bench-stable arylsulfonate phenol esters. This protocol enables access to putative sulfonyl radical intermediates, which enable straightforward access to valuable vinyl sulfones.
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Affiliation(s)
- Maxim Ratushnyy
- Department of Chemistry , University of Illinois at Chicago , 845 W. Taylor St., Room 4500 SES , Chicago , Illinois 60607 , USA .
| | - Monika Kamenova
- Department of Chemistry , University of Illinois at Chicago , 845 W. Taylor St., Room 4500 SES , Chicago , Illinois 60607 , USA .
| | - Vladimir Gevorgyan
- Department of Chemistry , University of Illinois at Chicago , 845 W. Taylor St., Room 4500 SES , Chicago , Illinois 60607 , USA .
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237
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Abrams R, Lefebvre Q, Clayden J. Transition Metal Free Cycloamination of Prenyl Carbamates and Ureas Promoted by Aryldiazonium Salts. Angew Chem Int Ed Engl 2018; 57:13587-13591. [DOI: 10.1002/anie.201809323] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Indexed: 12/19/2022]
Affiliation(s)
- Roman Abrams
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | - Quentin Lefebvre
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | - Jonathan Clayden
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
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238
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Abrams R, Lefebvre Q, Clayden J. Transition Metal Free Cycloamination of Prenyl Carbamates and Ureas Promoted by Aryldiazonium Salts. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201809323] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Roman Abrams
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | - Quentin Lefebvre
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
| | - Jonathan Clayden
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS UK
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239
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240
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Iakobson G, Pošta M, Beier P. Reductive activation of sulfur hexafluoride with TEMPOLi: Addition of the pentafluorosulfanyl group and TEMPO to terminal alkenes. J Fluor Chem 2018. [DOI: 10.1016/j.jfluchem.2018.07.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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241
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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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242
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Maeda H, Takayama H, Segi M. Photoinduced three-component coupling reactions of electron deficient alkenes, dienes and active methylene compounds. Photochem Photobiol Sci 2018; 17:1118-1126. [PMID: 29999085 DOI: 10.1039/c8pp00239h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The irradiation of aqueous acetonitrile solutions, containing electron deficient alkenes, dienes and active methylene compounds along with sodium or cesium carbonate and catalytic amounts of phenanthrene or pyrene, gives rise to the formation of novel three-component coupling products and diene dimers. Cinnamonitrile and benzylidenemalononitrile and its derivatives serve as electron-acceptors; 2,5-dimethyl-2,4-hexadiene and malononitrile anion serve as electron donors in this process. Based on the results of UV-vis absorption spectroscopy and the calculated ΔG values for single electron transfer (SET), mechanisms are proposed for the coupling reaction involving photoinduced electron transfer (PET) between the electron deficient alkenes and dienes or malononitrile anion via direct excitation of electron deficient alkenes or redox photosensitization using phenanthrene or pyrene serving as a photosensitizer.
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Affiliation(s)
- Hajime Maeda
- Division of Material Chemistry, Graduate School of Natural Science and Technology Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan.
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243
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Kärkäs MD. Electrochemical strategies for C-H functionalization and C-N bond formation. Chem Soc Rev 2018; 47:5786-5865. [PMID: 29911724 DOI: 10.1039/c7cs00619e] [Citation(s) in RCA: 588] [Impact Index Per Article: 98.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Conventional methods for carrying out carbon-hydrogen functionalization and carbon-nitrogen bond formation are typically conducted at elevated temperatures, and rely on expensive catalysts as well as the use of stoichiometric, and perhaps toxic, oxidants. In this regard, electrochemical synthesis has recently been recognized as a sustainable and scalable strategy for the construction of challenging carbon-carbon and carbon-heteroatom bonds. Here, electrosynthesis has proven to be an environmentally benign, highly effective and versatile platform for achieving a wide range of nonclassical bond disconnections via generation of radical intermediates under mild reaction conditions. This review provides an overview on the use of anodic electrochemical methods for expediting the development of carbon-hydrogen functionalization and carbon-nitrogen bond formation strategies. Emphasis is placed on methodology development and mechanistic insight and aims to provide inspiration for future synthetic applications in the field of electrosynthesis.
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Affiliation(s)
- Markus D Kärkäs
- Department of Chemistry, Organic Chemistry, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden.
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244
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Yu C, Patureau FW. Kupfer-katalysierte dehydrierende ortho
-Aminomethylierung von Phenolen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804829] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Congjun Yu
- FB Chemie; TU Kaiserslautern; Erwin-Schrödinger-Straße 52 67663 Kaiserslautern Deutschland
| | - Frederic W. Patureau
- FB Chemie; TU Kaiserslautern; Erwin-Schrödinger-Straße 52 67663 Kaiserslautern Deutschland
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245
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Yu C, Patureau FW. Cu-Catalyzed Cross-Dehydrogenative ortho-Aminomethylation of Phenols. Angew Chem Int Ed Engl 2018; 57:11807-11811. [PMID: 29931717 PMCID: PMC6468272 DOI: 10.1002/anie.201804829] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 06/12/2018] [Indexed: 12/13/2022]
Abstract
A highly selective CuII‐catalyzed cross‐dehydrogenative ortho‐aminomethylation of phenols with aniline derivatives is described. The corresponding C(sp2)−C(sp3) coupling products were obtained in moderate to excellent yields under mild reaction conditions and with a broad substrate scope. A radical mechanism is proposed.
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Affiliation(s)
- Congjun Yu
- FB Chemie, TU Kaiserslautern, Erwin Schrödinger Strasse 52, 67663, Kaiserslautern, Germany
| | - Frederic W Patureau
- FB Chemie, TU Kaiserslautern, Erwin Schrödinger Strasse 52, 67663, Kaiserslautern, Germany
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246
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Liu BB, Bai HW, Liu H, Wang SY, Ji SJ. Cascade Trisulfur Radical Anion (S3•–) Addition/Electron Detosylation Process for the Synthesis of 1,2,3-Thiadiazoles and Isothiazoles. J Org Chem 2018; 83:10281-10288. [DOI: 10.1021/acs.joc.8b01450] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Bei-Bei Liu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, People’s Republic of China
| | - Hui-Wen Bai
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, People’s Republic of China
| | - Huan Liu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, People’s Republic of China
| | - Shun-Yi Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, People’s Republic of China
| | - Shun-Jun Ji
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science & Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, People’s Republic of China
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247
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Jiang YT, Yu ZZ, Zhang YK, Wang B. N-Bromosuccinimide-Induced C-H Bond Functionalization: An Intramolecular Cycloaromatization of Electron Withdrawing Group Substituted 1-Biphenyl-2-ylethanone for the Synthesis of 10-Phenanthrenol. Org Lett 2018; 20:3728-3731. [PMID: 29923730 DOI: 10.1021/acs.orglett.8b01160] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
An NBS-induced intramolecular cycloaromatization for the synthesis of 10-phenanthrenols from electron-withdrawing group substituted 1-biphenyl-2-ylethanones is described. The in situ generated bromide was designed to act as an initiator for the radical C-H bond activation. An oxidative cross-dehydrogenative coupling reaction of a highly active C-H bond with an inert C-H bond readily occurs under mild conditions without the need for transition metals or strong oxidants.
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Affiliation(s)
- Ya-Ting Jiang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research , Nankai University , Haihe Education Park, 38 Tongyan Road , Tianjin 300353 , People's Republic of China
| | - Zhen-Zhen Yu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research , Nankai University , Haihe Education Park, 38 Tongyan Road , Tianjin 300353 , People's Republic of China
| | - Ya-Kai Zhang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research , Nankai University , Haihe Education Park, 38 Tongyan Road , Tianjin 300353 , People's Republic of China
| | - Bin Wang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Tianjin Key Laboratory of Molecular Drug Research , Nankai University , Haihe Education Park, 38 Tongyan Road , Tianjin 300353 , People's Republic of China
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248
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Surendra Babu GV, Sai Prathima P, Perumgani PC, Sridhar B, Venkateshwar Rao T, Mohan Rao M. Metal-free cross-dehydrogenative coupling approach for C-H bond functionalization of 2-phenyl pyridine derivatives in water. HETEROATOM CHEMISTRY 2018. [DOI: 10.1002/hc.21423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Gogu Venkata Surendra Babu
- Catalysis Laboratory; Inorganic and Physical Chemistry Division; CSIR; Indian Institute of Chemical Technology; Hyderabad India
| | - Parvathaneni Sai Prathima
- Catalysis Laboratory; Inorganic and Physical Chemistry Division; CSIR; Indian Institute of Chemical Technology; Hyderabad India
| | - Pullaiah C. Perumgani
- Catalysis Laboratory; Inorganic and Physical Chemistry Division; CSIR; Indian Institute of Chemical Technology; Hyderabad India
| | - Balasubramanian Sridhar
- Catalysis Laboratory; Inorganic and Physical Chemistry Division; CSIR; Indian Institute of Chemical Technology; Hyderabad India
| | - Tumula Venkateshwar Rao
- Catalysis Laboratory; Inorganic and Physical Chemistry Division; CSIR; Indian Institute of Chemical Technology; Hyderabad India
| | - Mandapati Mohan Rao
- Catalysis Laboratory; Inorganic and Physical Chemistry Division; CSIR; Indian Institute of Chemical Technology; Hyderabad India
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249
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Faisca Phillips AM, Pombeiro AJL. Recent Developments in Transition Metal-Catalyzed Cross-Dehydrogenative Coupling Reactions of Ethers and Thioethers. ChemCatChem 2018. [DOI: 10.1002/cctc.201800582] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ana Maria Faisca Phillips
- Centro de Química Estrutural; Complexo I; Instituto Superior Técnico; Universidade de Lisboa; Av. Rovisco Pais 1049-001 Lisboa Portugal
| | - Armando J. L. Pombeiro
- Centro de Química Estrutural; Complexo I; Instituto Superior Técnico; Universidade de Lisboa; Av. Rovisco Pais 1049-001 Lisboa Portugal
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250
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