1
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Lei X, Wang Y, Ma S, Jiao P. Purple Light-Promoted Coupling of Bromopyridines with Grignard Reagents via SET. J Org Chem 2024; 89:7148-7155. [PMID: 38718346 DOI: 10.1021/acs.joc.4c00525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
Alkyl- and arylpyridines and 2,2'-bipyridines are conventionally prepared by Minisci reactions of pyridines and transition metal-catalyzed coupling reactions of halopyridines. Herein, purple light-promoted radical coupling reactions of 2- or 4-bromopyridines with Grignard reagents in Et2O or a mixture of Et2O and tetrahydrofuran in regular glassware without the need for a transition metal catalyst were disclosed for the first time. Methyl, primary and secondary alkyl, cycloalkyl, aryl, heteroaryl, pyridyl, and alkynyl Grignard reagents were compatible with the protocol. As a result, alkyl- and arylpyridines and 2,2'-bipyridines were easily prepared. Single electron transfer from the Grignard reagent to bromopyridine was stimulated by purple light. An electron extruded from the dimerization of the Grignard reagent worked as the catalyst. Light on/off experiments indicated that constant irradiation was required for product formation. Studies of radical clock substrates verified the involvement of a pyridyl radical from bromopyridine and the noninvolvement of an alkyl or aryl radical from the Grignard reagent. The available proof supports a photoinduced SRN mechanism for the new coupling reactions.
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Affiliation(s)
- Xingyu Lei
- College of Chemistry, Beijing Normal University, No. 19 Xinjiekouwai Street, Beijing 100875, China
| | - Yihan Wang
- College of Chemistry, Beijing Normal University, No. 19 Xinjiekouwai Street, Beijing 100875, China
| | - Shanshan Ma
- Institute of Rural Revitalization (Institute of Medicine and Health Care), Dezhou University, No. 566 West University Road, Dezhou 253023, China
| | - Peng Jiao
- College of Chemistry, Beijing Normal University, No. 19 Xinjiekouwai Street, Beijing 100875, China
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2
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Zhong C, Liu M, Qiu X, Wei H, Cui B, Shi Y, Cao C. Nickel-Catalyzed Cross-Coupling Reaction of Aryl Methyl Sulfides with Aryl Bromides. J Org Chem 2023; 88:13418-13426. [PMID: 37752001 DOI: 10.1021/acs.joc.3c00630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
A nickel-catalyzed cross-coupling reaction of aryl methyl sulfides with aryl bromides has been developed to access biaryls in yields of up to 86%. The reactions proceeded well using Ni(COD)2 as catalyst with the ligand BINAP (2,2'-bis(diphenylphosphanyl)-1,1'-binaphthalene) in the presence of magnesium. The method has a broad scope of substrates and is scalable. The wide availability of commercially available aryl bromides and the absence of preparation and preparation of organometallic reagents make the reaction of high application value.
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Affiliation(s)
- Chuntao Zhong
- School of Chemistry and Material Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Mengna Liu
- School of Chemistry and Material Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Xianchao Qiu
- School of Chemistry and Material Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Hao Wei
- School of Chemistry and Material Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Benqiang Cui
- School of Chemistry and Material Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Yanhui Shi
- School of Chemistry and Material Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Changsheng Cao
- School of Chemistry and Material Science, Jiangsu Normal University, Xuzhou 221116, China
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3
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Shirakawa E, Ota Y, Yonekura K, Okura K, Mizusawa S, Sarkar SK, Abe M. Manipulation of an electron by photoirradiation in the electron-catalyzed cross-coupling reaction. SCIENCE ADVANCES 2023; 9:eadh3544. [PMID: 37256951 PMCID: PMC10413655 DOI: 10.1126/sciadv.adh3544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Accepted: 04/26/2023] [Indexed: 06/02/2023]
Abstract
An electron has recently been shown to catalyze the cross-coupling reaction of organometallic compounds with aryl halides. In terms of green and sustainable chemistry, the electron catalysis is much more desirable than the inevitably used transition metal catalysis but a high temperature of more than 100°C is required to achieve it. Here, we disclose that visible light photoirradiation accelerates the electron-catalyzed reaction of arylzinc reagents with aryl halides with the aid of a photoredox catalysis. Photoexcitation of a photoredox catalyst and an anion radical intermediate respectively affects the supply and transfer of the electron catalyst, promoting the cross-coupling reaction to proceed at room temperature. The supply of the electron catalyst by the photoredox catalysis makes the scope of aryl halides wider.
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Affiliation(s)
- Eiji Shirakawa
- Department of Applied Chemistry for Environment, School of Biological and Environmental Sciences, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan
| | - Yuki Ota
- Department of Applied Chemistry for Environment, School of Biological and Environmental Sciences, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan
| | - Kyohei Yonekura
- Department of Applied Chemistry for Environment, School of Biological and Environmental Sciences, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan
| | - Keisho Okura
- Department of Applied Chemistry for Environment, School of Biological and Environmental Sciences, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan
| | - Sahiro Mizusawa
- Department of Applied Chemistry for Environment, School of Biological and Environmental Sciences, Kwansei Gakuin University, Sanda, Hyogo 669-1337, Japan
- Fine Materials Department, Osaka Gas Chemicals, Co., Ltd., Konohana-ku, Osaka, 554-0051, Japan
| | - Sujan Kumar Sarkar
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, Higashihiroshima, Hiroshima 739-8526, Japan
- Advanced Patterning Department, Interuniversity Microelectronics Centre (IMEC), Leuven 3001, Belgium
| | - Manabu Abe
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University, Higashihiroshima, Hiroshima 739-8526, Japan
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4
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Borys AM, Gil-Negrete JM, Hevia E. Atom-efficient transition-metal-free arylation of N, O-acetals using diarylzinc reagents through Zn/Zn cooperativity. Chem Commun (Camb) 2021; 57:8905-8908. [PMID: 34486629 PMCID: PMC8419782 DOI: 10.1039/d1cc04137a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Exploiting the cooperative action of Lewis acid Zn(C6F5)2 with diarylzinc reagents, the efficient arylation of N,O-acetals to access diarylmethylamines is reported. Reactions take place under mild reaction conditions without the need for transtion-metal catalysis. Mechanistic investigations have revealed that Zn(C6F5)2 not only acts as a Lewis acid activator, but also enables the regeneration of nucleophilic ZnAr2 species, allowing a limiting 50 mol% to be employed. Operating via a special type of Zn/Zn′ cooperation, a new transition-metal free and atom efficient method of arylating N,O-acetals has been developed combining nucleophilic ZnPh2 with Lewis acidic Zn(C6F5)2.![]()
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Affiliation(s)
- Andryj M Borys
- Departement für Chemie, Biochemie und Pharmazie, Universität Bern, Switzerland.
| | - Jose M Gil-Negrete
- Departement für Chemie, Biochemie und Pharmazie, Universität Bern, Switzerland.
| | - Eva Hevia
- Departement für Chemie, Biochemie und Pharmazie, Universität Bern, Switzerland.
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5
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Wei B, Ren Q, Bein T, Knochel P. Transition-Metal-Free Synthesis of Polyfunctional Triarylmethanes and 1,1-Diarylalkanes by Sequential Cross-Coupling of Benzal Diacetates with Organozinc Reagents. Angew Chem Int Ed Engl 2021; 60:10409-10414. [PMID: 33625773 PMCID: PMC8252654 DOI: 10.1002/anie.202101682] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Indexed: 12/02/2022]
Abstract
A variety of functionalized triarylmethane and 1,1-diarylalkane derivatives were prepared via a transition-metal-free, one-pot and two-step procedure, involving the reaction of various benzal diacetates with organozinc reagents. A sequential cross-coupling is enabled by changing the solvent from THF to toluene, and a two-step SN 1-type mechanism was proposed and evidenced by experimental studies. The synthetic utility of the method is further demonstrated by the synthesis of several biologically relevant molecules, such as an anti-tuberculosis agent, an anti-breast cancer agent, a precursor of a sphingosine-1-phosphate (S1P) receptor modulator, and a FLAP inhibitor.
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Affiliation(s)
- Baosheng Wei
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
| | - Qianyi Ren
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
| | - Thomas Bein
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
| | - Paul Knochel
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
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6
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Wei B, Ren Q, Bein T, Knochel P. Übergangsmetallfreie Synthese polyfunktioneller Triarylmethane und 1,1‐Diarylalkane durch sequentielle Kreuzkupplungen von Benzaldiacetaten mit Organozinkreagenzien. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101682] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Baosheng Wei
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstraße 5–13, Haus F 81377 München Deutschland
| | - Qianyi Ren
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstraße 5–13, Haus F 81377 München Deutschland
| | - Thomas Bein
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstraße 5–13, Haus F 81377 München Deutschland
| | - Paul Knochel
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstraße 5–13, Haus F 81377 München Deutschland
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7
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Wang C. Development of Transition-Metal-Catalysed Cross-Coupling Reactions through Ammonium C–N Bond Cleavage. Chem Pharm Bull (Tokyo) 2020; 68:683-693. [DOI: 10.1248/cpb.c20-00196] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Chao Wang
- Graduate School of Pharmaceutical Sciences, The University of Tokyo
- Cluster of Pioneering Research, (CPR), Advanced Elements Chemistry Laboratory, RIKEN
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8
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Tezuka N, Hirano K, Uchiyama M. A Direct, Chemo-, and Regioselective Cross-Coupling Reaction of Arenes via Sequential Directed ortho Cuprations and Oxidation. Org Lett 2019; 21:9536-9540. [PMID: 31738063 DOI: 10.1021/acs.orglett.9b03719] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Direct cross-coupling of Csp2-H/Csp2-H bonds of two arenes was achieved in 30-76% yield via sequential directed ortho cuprations (DoCu) with the cuprate base (TMP)2Cu(CN)Li2 (1, TMP = 2,2,6,6-tetramethylpiperidido), followed by oxidation. This methodology offers easy access to unsymmetric biaryls from arenes with a variety of directed metalation groups (DMGs) and ancillary functional groups, taking advantage of the highly chemoselective action of 1.
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Affiliation(s)
- Noriyuki Tezuka
- Graduate School of Pharmaceutical Sciences , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-0033 , Japan.,Cluster of Pioneering Research (CPR), Advanced Elements Chemistry Laboratory , RIKEN , 2-1 Hirosawa , Wako-shi , Saitama 351-0198 , Japan
| | - Keiichi Hirano
- Graduate School of Pharmaceutical Sciences , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-0033 , Japan.,Cluster of Pioneering Research (CPR), Advanced Elements Chemistry Laboratory , RIKEN , 2-1 Hirosawa , Wako-shi , Saitama 351-0198 , Japan
| | - Masanobu Uchiyama
- Graduate School of Pharmaceutical Sciences , The University of Tokyo , 7-3-1 Hongo , Bunkyo-ku , Tokyo 113-0033 , Japan.,Cluster of Pioneering Research (CPR), Advanced Elements Chemistry Laboratory , RIKEN , 2-1 Hirosawa , Wako-shi , Saitama 351-0198 , Japan.,Research Initiative for Supra-Materials (RISM) , Shinshu University , 3-15-1 Tokida , Ueda , Nagano 386-8567 , Japan
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9
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Shirakawa E. Electron-Catalyzed Cross-Coupling Reactions. J SYN ORG CHEM JPN 2019. [DOI: 10.5059/yukigoseikyokaishi.77.433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Eiji Shirakawa
- Department of Applied Chemistry for Environment, School of Science and Technology, Kwansei Gakuin University
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10
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Guo L, Liu F, Wang L, Yuan H, Feng L, Kürti L, Gao H. Cascade Approach to Highly Functionalized Biaryls by a Nucleophilic Aromatic Substitution with Arylhydroxylamines. Org Lett 2019; 21:2894-2898. [PMID: 30942599 DOI: 10.1021/acs.orglett.9b00927] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A transition-metal free synthesis of highly functionalized 2-hydroxy-2'-amino-1,1'-biaryls from N-arylhydroxylamines has been developed. This operationally simple and readily scalable approach relies on a cascade of reactions that initially generates transient N, O-diarylhydroxylamines, via direct O-arylation, which then undergo rapid [3,3]-sigmatropic rearrangement and subsequent rearomatization to form NOBIN-type products. These structurally diverse functionalized biaryls are obtained under mild conditions in good to excellent isolated yields.
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Affiliation(s)
- Lirong Guo
- School of Chemistry and Chemical Engineering, Key Laboratory of Colloid and Interface Chemistry, Ministry of Education , Shandong University , 27 South Shanda Road , Ji'nan , Shandong 250100 , China
| | - Fengting Liu
- School of Chemistry and Chemical Engineering, Key Laboratory of Colloid and Interface Chemistry, Ministry of Education , Shandong University , 27 South Shanda Road , Ji'nan , Shandong 250100 , China
| | - Liying Wang
- School of Chemistry and Chemical Engineering, Key Laboratory of Colloid and Interface Chemistry, Ministry of Education , Shandong University , 27 South Shanda Road , Ji'nan , Shandong 250100 , China
| | - Hairui Yuan
- School of Chemistry and Chemical Engineering, Key Laboratory of Colloid and Interface Chemistry, Ministry of Education , Shandong University , 27 South Shanda Road , Ji'nan , Shandong 250100 , China
| | - Lei Feng
- School of Chemistry and Chemical Engineering, Key Laboratory of Colloid and Interface Chemistry, Ministry of Education , Shandong University , 27 South Shanda Road , Ji'nan , Shandong 250100 , China
| | - László Kürti
- Department of Chemistry , Rice University , BioScience Research Collaborative, Houston , Texas 77005 , United States
| | - Hongyin Gao
- School of Chemistry and Chemical Engineering, Key Laboratory of Colloid and Interface Chemistry, Ministry of Education , Shandong University , 27 South Shanda Road , Ji'nan , Shandong 250100 , China
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11
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Hernán-Gómez A, Orr SA, Uzelac M, Kennedy AR, Barroso S, Jusseau X, Lemaire S, Farina V, Hevia E. Exploiting Synergistic Effects in Organozinc Chemistry for Direct Stereoselective C-Glycosylation Reactions at Room Temperature. Angew Chem Int Ed Engl 2018; 57:10630-10634. [PMID: 29856904 DOI: 10.1002/anie.201805758] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Indexed: 11/06/2022]
Abstract
Pairing a range of bis(aryl) zinc reagents ZnAr2 with the stronger Lewis acidic [(ZnArF2 )] (ArF =C6 F5 ), enables highly stereoselective cross-coupling between glycosyl bromides and ZnAr2 without the use of a transition metal. Reactions occur at room temperature with excellent levels of stereoselectivity, where ZnArF2 acts as a non-coupling partner although its presence is crucial for the execution of the C(sp2 )-C(sp3 ) bond formation process. Mechanistic studies have uncovered a unique synergistic partnership between the two zinc reagents, which circumvents the need for transition-metal catalysis or forcing reaction conditions. Key to the success of the coupling is the avoidance of solvents that act as Lewis bases versus diarylzinc compounds (e.g. THF).
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Affiliation(s)
- Alberto Hernán-Gómez
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
| | - Samantha A Orr
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
| | - Marina Uzelac
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
| | - Alan R Kennedy
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
| | - Santiago Barroso
- Pharmaceutical Development and Manufacturing Sciences, Janssen Pharmaceutica, Turnhoutseweg 30, 2340, Beerse, Belgium
| | - Xavier Jusseau
- Pharmaceutical Development and Manufacturing Sciences, Janssen Pharmaceutica, Turnhoutseweg 30, 2340, Beerse, Belgium
| | - Sébastien Lemaire
- Pharmaceutical Development and Manufacturing Sciences, Janssen Pharmaceutica, Turnhoutseweg 30, 2340, Beerse, Belgium
| | - Vittorio Farina
- Pharmaceutical Development and Manufacturing Sciences, Janssen Pharmaceutica, Turnhoutseweg 30, 2340, Beerse, Belgium
| | - Eva Hevia
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, UK
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12
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Hernán‐Gómez A, Orr SA, Uzelac M, Kennedy AR, Barroso S, Jusseau X, Lemaire S, Farina V, Hevia E. Exploiting Synergistic Effects in Organozinc Chemistry for Direct Stereoselective C‐Glycosylation Reactions at Room Temperature. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201805758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Alberto Hernán‐Gómez
- WestCHEMDepartment of Pure and Applied ChemistryUniversity of Strathclyde 295 Cathedral Street Glasgow G1 1XL UK
| | - Samantha A. Orr
- WestCHEMDepartment of Pure and Applied ChemistryUniversity of Strathclyde 295 Cathedral Street Glasgow G1 1XL UK
| | - Marina Uzelac
- WestCHEMDepartment of Pure and Applied ChemistryUniversity of Strathclyde 295 Cathedral Street Glasgow G1 1XL UK
| | - Alan R. Kennedy
- WestCHEMDepartment of Pure and Applied ChemistryUniversity of Strathclyde 295 Cathedral Street Glasgow G1 1XL UK
| | - Santiago Barroso
- Pharmaceutical Development and Manufacturing SciencesJanssen Pharmaceutica Turnhoutseweg 30 2340 Beerse Belgium
| | - Xavier Jusseau
- Pharmaceutical Development and Manufacturing SciencesJanssen Pharmaceutica Turnhoutseweg 30 2340 Beerse Belgium
| | - Sébastien Lemaire
- Pharmaceutical Development and Manufacturing SciencesJanssen Pharmaceutica Turnhoutseweg 30 2340 Beerse Belgium
| | - Vittorio Farina
- Pharmaceutical Development and Manufacturing SciencesJanssen Pharmaceutica Turnhoutseweg 30 2340 Beerse Belgium
| | - Eva Hevia
- WestCHEMDepartment of Pure and Applied ChemistryUniversity of Strathclyde 295 Cathedral Street Glasgow G1 1XL UK
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13
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Okura K, Teranishi T, Yoshida Y, Shirakawa E. Electron-Catalyzed Cross-Coupling of Arylboron Compounds with Aryl Iodides. Angew Chem Int Ed Engl 2018; 57:7186-7190. [PMID: 29693783 DOI: 10.1002/anie.201802813] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 04/10/2018] [Indexed: 11/11/2022]
Abstract
Arylboroxines in combination with zinc chloride and potassium tert-butoxide were found to undergo the electron-catalyzed cross-coupling with aryl iodides to give the corresponding biaryls without the aid of transition-metal catalysis.
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Affiliation(s)
- Keisho Okura
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Tsuyoshi Teranishi
- Department of Applied Chemistry for Environment, School of Science and Technology, Kwansei Gakuin University, Sanda, Hyogo, 669-1337, Japan
| | - Yuto Yoshida
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo-ku, Kyoto, 606-8502, Japan
| | - Eiji Shirakawa
- Department of Applied Chemistry for Environment, School of Science and Technology, Kwansei Gakuin University, Sanda, Hyogo, 669-1337, Japan
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14
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Okura K, Teranishi T, Yoshida Y, Shirakawa E. Electron-Catalyzed Cross-Coupling of Arylboron Compounds with Aryl Iodides. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802813] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Keisho Okura
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo-ku Kyoto 606-8502 Japan
| | - Tsuyoshi Teranishi
- Department of Applied Chemistry for Environment; School of Science and Technology; Kwansei Gakuin University; Sanda Hyogo 669-1337 Japan
| | - Yuto Yoshida
- Department of Chemistry; Graduate School of Science; Kyoto University; Sakyo-ku Kyoto 606-8502 Japan
| | - Eiji Shirakawa
- Department of Applied Chemistry for Environment; School of Science and Technology; Kwansei Gakuin University; Sanda Hyogo 669-1337 Japan
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15
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Kiriyama K, Okura K, Tamakuni F, Shirakawa E. Electron-Catalyzed Coupling of Magnesium Amides with Aryl Iodides. Chemistry 2018; 24:4519-4522. [PMID: 29450924 DOI: 10.1002/chem.201800011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Indexed: 11/06/2022]
Abstract
An electron was found to catalyze the coupling of magnesium diarylamides with aryl iodides giving triarylamines through a radical-anion intermediate. The transformation requires no transition metal catalysts or additives, and a wide array of products are formed in good-to-excellent yields.
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Affiliation(s)
- Kazuya Kiriyama
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502, Japan
| | - Keisho Okura
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502, Japan
| | - Fumiko Tamakuni
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto, 606-8502, Japan
| | - Eiji Shirakawa
- Department of Applied Chemistry for Environment, School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo, 669-1337, Japan
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16
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Procter RJ, Dunsford JJ, Rushworth PJ, Hulcoop DG, Layfield RA, Ingleson MJ. A Zinc Catalyzed C(sp 3 )-C(sp 2 ) Suzuki-Miyaura Cross-Coupling Reaction Mediated by Aryl-Zincates. Chemistry 2017; 23:15889-15893. [PMID: 28960610 PMCID: PMC5915750 DOI: 10.1002/chem.201704170] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Indexed: 11/14/2022]
Abstract
The Suzuki-Miyaura (SM) reaction is one of the most important methods for C-C bond formation in chemical synthesis. In this communication, we show for the first time that the low toxicity, inexpensive element zinc is able to catalyze SM reactions. The cross-coupling of benzyl bromides with aryl borates is catalyzed by ZnBr2 , in a process that is free from added ligand, and is compatible with a range of functionalized benzyl bromides and arylboronic acid pinacol esters. Initial mechanistic investigations indicate that the selective in situ formation of triaryl zincates is crucial to promote selective cross-coupling reactivity, which is facilitated by employing an arylborate of optimal nucleophilicity.
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Affiliation(s)
| | - Jay J. Dunsford
- School of ChemistryThe University of ManchesterManchesterM13 9PLUK
| | | | - David G. Hulcoop
- Research and DevelopmentGlaxoSmithKlineGunnelswood RoadStevenageSG1 2NYUK
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17
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Yang B, Wang ZX. Transition-Metal-Free Cross-Coupling of Aryl and Heteroaryl Thiols with Arylzinc Reagents. Org Lett 2017; 19:6220-6223. [DOI: 10.1021/acs.orglett.7b03145] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bo Yang
- CAS
Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory
for Physical Sciences at Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
| | - Zhong-Xia Wang
- CAS
Key Laboratory of Soft Matter Chemistry, Hefei National Laboratory
for Physical Sciences at Microscale and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300072, P. R. China
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18
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Dai WC, Wang ZX. Transition-Metal-Free Reaction of Aryltrimethylammonium Iodides with Arylzinc Reagents. Chem Asian J 2017; 12:3005-3009. [DOI: 10.1002/asia.201701342] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Revised: 09/27/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Wei-Can Dai
- CAS Key Laboratory of Soft Matter Chemistry; Hefei National Laboratory for Physical Sciences at Microscale; and Department of Chemistry; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
| | - Zhong-Xia Wang
- CAS Key Laboratory of Soft Matter Chemistry; Hefei National Laboratory for Physical Sciences at Microscale; and Department of Chemistry; University of Science and Technology of China; Hefei Anhui 230026 P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin 300072 P. R. China
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19
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Wang DY, Morimoto K, Yang ZK, Wang C, Uchiyama M. Organozinc-Mediated Direct C-C Bond Formation via C-N Bond Cleavage of Ammonium Salts. Chem Asian J 2017; 12:2554-2557. [PMID: 28834419 DOI: 10.1002/asia.201701132] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 08/21/2017] [Indexed: 11/08/2022]
Abstract
We report a direct cross-coupling reaction between diarylzinc (Ar2 Zn) and aryltrimethylammonium salts (ArNMe3+ ⋅- OTf) in the presence of LiCl, via C-N bond cleavage. The reaction takes place smoothly upon heating in THF without any external catalyst, enabling an efficient and chemoselective formation of biaryl products. Mechanistic studies indicate that the reaction proceeds through a single electron transfer route.
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Affiliation(s)
- Dong-Yu Wang
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo-to, 113-0033, Japan.,Advanced Elements Chemistry Research Team, RIKEN Center for Sustainable Resource Science, and Elements Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama-ken, 351-0198, Japan.,Current address: CAS Key Laboratory of Receptor Research and the State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zu Chong Zhi Road, Pudong, Shanghai, 201203, China
| | - Koki Morimoto
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo-to, 113-0033, Japan
| | - Ze-Kun Yang
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo-to, 113-0033, Japan.,Advanced Elements Chemistry Research Team, RIKEN Center for Sustainable Resource Science, and Elements Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama-ken, 351-0198, Japan
| | - Chao Wang
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo-to, 113-0033, Japan.,Advanced Elements Chemistry Research Team, RIKEN Center for Sustainable Resource Science, and Elements Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama-ken, 351-0198, Japan
| | - Masanobu Uchiyama
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo-to, 113-0033, Japan.,Advanced Elements Chemistry Research Team, RIKEN Center for Sustainable Resource Science, and Elements Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama-ken, 351-0198, Japan
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20
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Nogami M, Hirano K, Kanai M, Wang C, Saito T, Miyamoto K, Muranaka A, Uchiyama M. Transition Metal-Free trans-Selective Alkynylboration of Alkynes. J Am Chem Soc 2017; 139:12358-12361. [DOI: 10.1021/jacs.7b06212] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Marina Nogami
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
| | - Keiichi Hirano
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
| | - Misae Kanai
- Advanced
Elements Chemistry Research Team, RIKEN Center for Sustainable Resource Science, and Elements Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Chao Wang
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
| | - Tatsuo Saito
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kazunori Miyamoto
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
| | - Atsuya Muranaka
- Advanced
Elements Chemistry Research Team, RIKEN Center for Sustainable Resource Science, and Elements Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Masanobu Uchiyama
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
- Advanced
Elements Chemistry Research Team, RIKEN Center for Sustainable Resource Science, and Elements Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
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21
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Ogawa H, Yang ZK, Minami H, Kojima K, Saito T, Wang C, Uchiyama M. Revisitation of Organoaluminum Reagents Affords a Versatile Protocol for C–X (X = N, O, F) Bond-Cleavage Cross-Coupling: A Systematic Study. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01058] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hiroyuki Ogawa
- Graduate
School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Ze-Kun Yang
- Graduate
School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Advanced
Elements Chemistry Research Team, RIKEN Center for Sustainable Resource
Science, and Elements Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Hiroki Minami
- Graduate
School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kumiko Kojima
- Graduate
School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Tatsuo Saito
- Graduate
School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Advanced
Elements Chemistry Research Team, RIKEN Center for Sustainable Resource
Science, and Elements Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Chao Wang
- Graduate
School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Advanced
Elements Chemistry Research Team, RIKEN Center for Sustainable Resource
Science, and Elements Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
| | - Masanobu Uchiyama
- Graduate
School of Pharmaceutical Sciences, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- Advanced
Elements Chemistry Research Team, RIKEN Center for Sustainable Resource
Science, and Elements Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan
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22
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He Q, Wang L, Liang Y, Zhang Z, Wnuk SF. Transition-Metal-Free Cross-Coupling of Aryl Halides with Arylstannanes. J Org Chem 2016; 81:9422-9427. [DOI: 10.1021/acs.joc.6b01648] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Qing He
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an, 710062, P. R. China
- College
of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, 325027, P. R. China
| | - Liwen Wang
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an, 710062, P. R. China
| | - Yong Liang
- Department
of Chemistry and Biochemistry, Florida International University, Miami, Florida 33199, United States
| | - Zunting Zhang
- Key Laboratory of the Ministry of Education for Medicinal Resources and Natural Pharmaceutical Chemistry, National Engineering Laboratory for Resource Development of Endangered Crude Drugs in Northwest of China, School of Chemistry & Chemical Engineering, Shaanxi Normal University, Xi’an, 710062, P. R. China
| | - Stanislaw F. Wnuk
- Department
of Chemistry and Biochemistry, Florida International University, Miami, Florida 33199, United States
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23
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Ellwart M, Makarov IS, Achrainer F, Zipse H, Knochel P. Regioselektive Allyl-Allyl-Kreuzkupplungen ohne Übergangsmetallkatalysator. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603923] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Mario Ellwart
- Ludwig-Maximilians-Universität München, Department Chemie; Butenandtstraße 5-13, Haus F 81377 München Deutschland
| | - Ilya S. Makarov
- Ludwig-Maximilians-Universität München, Department Chemie; Butenandtstraße 5-13, Haus F 81377 München Deutschland
| | - Florian Achrainer
- Ludwig-Maximilians-Universität München, Department Chemie; Butenandtstraße 5-13, Haus F 81377 München Deutschland
| | - Hendrik Zipse
- Ludwig-Maximilians-Universität München, Department Chemie; Butenandtstraße 5-13, Haus F 81377 München Deutschland
| | - Paul Knochel
- Ludwig-Maximilians-Universität München, Department Chemie; Butenandtstraße 5-13, Haus F 81377 München Deutschland
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24
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Ellwart M, Makarov IS, Achrainer F, Zipse H, Knochel P. Regioselective Transition-Metal-Free Allyl-Allyl Cross-Couplings. Angew Chem Int Ed Engl 2016; 55:10502-6. [DOI: 10.1002/anie.201603923] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Mario Ellwart
- Ludwig-Maximilians-Universität München, Department Chemie; Butenandtstrasse 5-13, Haus F 81377 München Germany
| | - Ilya S. Makarov
- Ludwig-Maximilians-Universität München, Department Chemie; Butenandtstrasse 5-13, Haus F 81377 München Germany
| | - Florian Achrainer
- Ludwig-Maximilians-Universität München, Department Chemie; Butenandtstrasse 5-13, Haus F 81377 München Germany
| | - Hendrik Zipse
- Ludwig-Maximilians-Universität München, Department Chemie; Butenandtstrasse 5-13, Haus F 81377 München Germany
| | - Paul Knochel
- Ludwig-Maximilians-Universität München, Department Chemie; Butenandtstrasse 5-13, Haus F 81377 München Germany
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25
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Okura K, Shirakawa E. Single-Electron-Transfer-Induced Coupling of Alkylzinc Reagents with Aryl Iodides. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600367] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Keisho Okura
- Department of Chemistry; Graduate School of Science; Kyoto University; 606-8502 Kyoto Kyoto Japan
| | - Eiji Shirakawa
- Department of Applied Chemistry for Environment; School of Science and Technology; Kwansei Gakuin University; 669-1337 Sanda Hyogo Japan
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26
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Okura K, Kawashima H, Tamakuni F, Nishida N, Shirakawa E. Single electron transfer-induced coupling of alkynylzinc reagents with aryl and alkenyl iodides. Chem Commun (Camb) 2016; 52:14019-14022. [DOI: 10.1039/c6cc08038c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An alkynyl–aryl coupling without the aid of transition metal catalysis has been achieved for the first time.
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Affiliation(s)
- Keisho Okura
- Department of Chemistry
- Graduate School of Science
- Kyoto University
- Sakyo
- Japan
| | - Hitomi Kawashima
- Department of Chemistry
- Graduate School of Science
- Kyoto University
- Sakyo
- Japan
| | - Fumiko Tamakuni
- Department of Chemistry
- Graduate School of Science
- Kyoto University
- Sakyo
- Japan
| | - Naoya Nishida
- Department of Chemistry
- Graduate School of Science
- Kyoto University
- Sakyo
- Japan
| | - Eiji Shirakawa
- Department of Applied Chemistry for Environment
- School of Science and Technology
- Kwansei Gakuin University
- Sanda
- Japan
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27
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Quinio P, Roman DS, León T, William S, Karaghiosoff K, Knochel P. Transition-Metal-Free Cross-Coupling of Aryl and N-Heteroaryl Cyanides with Benzylic Zinc Reagents. Org Lett 2015; 17:4396-9. [PMID: 26313453 DOI: 10.1021/acs.orglett.5b02380] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pauline Quinio
- Department
Chemie, Ludwig-Maximilians-Universität, Butenandtstrasse. 5-13, 81377 München, Germany
| | - Daniela Sustac Roman
- Department
Chemie, Ludwig-Maximilians-Universität, Butenandtstrasse. 5-13, 81377 München, Germany
| | - Thierry León
- Department
Chemie, Ludwig-Maximilians-Universität, Butenandtstrasse. 5-13, 81377 München, Germany
| | - Sharankini William
- Department
Chemie, Ludwig-Maximilians-Universität, Butenandtstrasse. 5-13, 81377 München, Germany
| | - Konstantin Karaghiosoff
- Department
Chemie, Ludwig-Maximilians-Universität, Butenandtstrasse. 5-13, 81377 München, Germany
| | - Paul Knochel
- Department
Chemie, Ludwig-Maximilians-Universität, Butenandtstrasse. 5-13, 81377 München, Germany
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28
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Minami H, Saito T, Wang C, Uchiyama M. Organoaluminum-Mediated Direct Cross-Coupling Reactions. Angew Chem Int Ed Engl 2015; 54:4665-8. [DOI: 10.1002/anie.201412249] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2014] [Indexed: 11/08/2022]
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29
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Minami H, Saito T, Wang C, Uchiyama M. Organoaluminum-Mediated Direct Cross-Coupling Reactions. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201412249] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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30
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Kato H, Hirano K, Kurauchi D, Toriumi N, Uchiyama M. Dialkylzinc-Mediated Cross-Coupling Reactions of Perfluoroalkyl and Perfluoroaryl Halides with Aryl Halides. Chemistry 2015; 21:3895-900. [DOI: 10.1002/chem.201406292] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2014] [Indexed: 01/19/2023]
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31
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Shirakawa E, Okura K, Uchiyama N, Murakami T, Hayashi T. Improved Procedure for Single-electron-transfer-induced Grignard Cross-coupling Reaction. CHEM LETT 2014. [DOI: 10.1246/cl.140155] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Eiji Shirakawa
- Department of Chemistry, Graduate School of Science, Kyoto University
| | - Keisho Okura
- Department of Chemistry, Graduate School of Science, Kyoto University
| | - Nanase Uchiyama
- Department of Chemistry, Graduate School of Science, Kyoto University
| | - Takuya Murakami
- Department of Chemistry, Graduate School of Science, Kyoto University
| | - Tamio Hayashi
- Institute of Materials Research and Engineering
- Department of Chemistry, National University of Singapore
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32
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Abstract
![]()
The
SET-induced biaryl cross-coupling reaction is established as
the first example of a Grignard SRN1 reaction. The reaction
is examined within the mechanistic framework of dissociative electron
transfer in the presence of a Lewis acid. DFT calculations show that
the reaction proceeds through a radical intermediate in the form of
an Mg ion-radical cage, which eludes detection in trapping experiments
by reacting quickly to form an MgPh2 radical anion intermediate.
A new mechanism is proposed.
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Affiliation(s)
- Brandon E Haines
- Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States
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