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Zhao Y, Yang Z, Wang X, Kang Q, Wang B, Wu T, Lei H, Ma P, Su W, Wang S, Wu Z, Huang X, Fan C, Wei X. Mechanochemical Synthesis of α-halo Alkylboronic Esters. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2404071. [PMID: 38958542 DOI: 10.1002/advs.202404071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 06/20/2024] [Indexed: 07/04/2024]
Abstract
α-halo alkylboronic esters, acting as ambiphilic synthons, play a pivotal role as versatile intermediates in fields like pharmaceutical science and organic chemistry. The sequential transformation of carbon-boron and carbon-halogen bonds into a broad range of carbon-X bonds allows for programmable bond formation, facilitating the incorporation of multiple substituents at a single position and streamlining the synthesis of complex molecules. Nevertheless, the synthetic potential of these compounds is constrained by limited reaction patterns. Additionally, the conventional methods often necessitate the use of bulk toxic solvents, exhibit sensitivity to air/moisture, rely on expensive metal catalysts, and involve extended reaction times. In this report, a ball milling technique is introduced that overcomes these limitations, enabling the external catalyst-free multicomponent coupling of aryl diazonium salts, alkenes, and simple metal halides. This approach offers a general and straightforward method for obtaining a diverse array of α-halo alkylboronic esters, thereby paving the way for the extensive utilization of these synthons in the synthesis of fine chemicals.
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Affiliation(s)
- Yunyi Zhao
- School of Pharmacy, Xi'an Jiaotong University, No.76, Yanta West Road, Xi'an, Shaanxi, 710061, P. R. China
- Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an, Shaanxi, 710061, P. R. China
| | - Zekun Yang
- School of Pharmacy, Xi'an Jiaotong University, No.76, Yanta West Road, Xi'an, Shaanxi, 710061, P. R. China
- Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an, Shaanxi, 710061, P. R. China
- Ningxia Jinghong Technology Co., Ltd. No. 98, Huihong District, Shizuishan Economic and Technological Development Zone, Shizuishan, Ningxia, 753000, P. R. China
| | - Xin Wang
- Department of Pathogenic Microbiology and Immunology, School of Basic Medical Sciences, Xi'an Jiaotong University, Yanta District, Xi'an, Shaanxi, 710061, P. R. China
| | - Qinchun Kang
- School of Pharmacy, Xi'an Jiaotong University, No.76, Yanta West Road, Xi'an, Shaanxi, 710061, P. R. China
- Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an, Shaanxi, 710061, P. R. China
| | - Bobo Wang
- School of Pharmacy, Xi'an Jiaotong University, No.76, Yanta West Road, Xi'an, Shaanxi, 710061, P. R. China
- Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an, Shaanxi, 710061, P. R. China
| | - Tianle Wu
- School of Pharmacy, Xi'an Jiaotong University, No.76, Yanta West Road, Xi'an, Shaanxi, 710061, P. R. China
- Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an, Shaanxi, 710061, P. R. China
| | - Hao Lei
- Department of Medicinal Chemistry, College of Pharmacy, Shenzhen Technology University, Shenzhen, 518118, P. R. China
| | - Peile Ma
- School of Pharmacy, Xi'an Jiaotong University, No.76, Yanta West Road, Xi'an, Shaanxi, 710061, P. R. China
- Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an, Shaanxi, 710061, P. R. China
| | - Wenqiang Su
- School of Pharmacy, Xi'an Jiaotong University, No.76, Yanta West Road, Xi'an, Shaanxi, 710061, P. R. China
- Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an, Shaanxi, 710061, P. R. China
| | - Siyuan Wang
- Department of Medicinal Chemistry, College of Pharmacy, Shenzhen Technology University, Shenzhen, 518118, P. R. China
| | - Zhiqiang Wu
- Ningxia Jinghong Technology Co., Ltd. No. 98, Huihong District, Shizuishan Economic and Technological Development Zone, Shizuishan, Ningxia, 753000, P. R. China
| | - Xinsong Huang
- Ningxia Jinghong Technology Co., Ltd. No. 98, Huihong District, Shizuishan Economic and Technological Development Zone, Shizuishan, Ningxia, 753000, P. R. China
| | - Chunying Fan
- School of Pharmacy, Xi'an Jiaotong University, No.76, Yanta West Road, Xi'an, Shaanxi, 710061, P. R. China
- Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an, Shaanxi, 710061, P. R. China
| | - Xiaofeng Wei
- School of Pharmacy, Xi'an Jiaotong University, No.76, Yanta West Road, Xi'an, Shaanxi, 710061, P. R. China
- Key Laboratory of Environment and Genes Related to Diseases (Xi'an Jiaotong University), Ministry of Education, Xi'an, Shaanxi, 710061, P. R. China
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Abstract
Nitroxides, also known as nitroxyl radicals, are long-lived or stable radicals with the general structure R1R2N-O•. The spin distribution over the nitroxide N and O atoms contributes to the thermodynamic stability of these radicals. The presence of bulky N-substituents R1 and R2 prevents nitroxide radical dimerization, ensuring their kinetic stability. Despite their reactivity toward various transient C radicals, some nitroxides can be easily stored under air at room temperature. Furthermore, nitroxides can be oxidized to oxoammonium salts (R1R2N═O+) or reduced to anions (R1R2N-O-), enabling them to act as valuable oxidants or reductants depending on their oxidation state. Therefore, they exhibit interesting reactivity across all three oxidation states. Due to these fascinating properties, nitroxides find extensive applications in diverse fields such as biochemistry, medicinal chemistry, materials science, and organic synthesis. This review focuses on the versatile applications of nitroxides in organic synthesis. For their use in other important fields, we will refer to several review articles. The introductory part provides a brief overview of the history of nitroxide chemistry. Subsequently, the key methods for preparing nitroxides are discussed, followed by an examination of their structural diversity and physical properties. The main portion of this review is dedicated to oxidation reactions, wherein parent nitroxides or their corresponding oxoammonium salts serve as active species. It will be demonstrated that various functional groups (such as alcohols, amines, enolates, and alkanes among others) can be efficiently oxidized. These oxidations can be carried out using nitroxides as catalysts in combination with various stoichiometric terminal oxidants. By reducing nitroxides to their corresponding anions, they become effective reducing reagents with intriguing applications in organic synthesis. Nitroxides possess the ability to selectively react with transient radicals, making them useful for terminating radical cascade reactions by forming alkoxyamines. Depending on their structure, alkoxyamines exhibit weak C-O bonds, allowing for the thermal generation of C radicals through reversible C-O bond cleavage. Such thermally generated C radicals can participate in various radical transformations, as discussed toward the end of this review. Furthermore, the application of this strategy in natural product synthesis will be presented.
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Affiliation(s)
- Dirk Leifert
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
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Heinrich MR, Diesendorf N. Current Advances in Meerwein-type Radical Alkene Functionalizations. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/s-0040-1719893] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
AbstractAlkene functionalizations via Meerwein arylations are becoming increasingly attractive, especially since a variety of mild and sustainable methods for aryl radical generation are available today. This entails a broad spectrum of substrates and radical scavengers, as well as convenient synthetic routes to relevant precursors for further transformations. The present review focuses on recent advances in Meerwein-type alkene functionalizations and gives insights into the key mechanistic details of the respective reactions.1 Introduction2 Hydroarylation and Carboarylation3 Carboamination, Carbooxygenation, and Carbothiolation4 Carbohalogenation5 Conclusion and Outlook
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Chen T, Zheng R, Yu J. An efficient approach to 3-thioether-functionalized 2,3-dihydrobenzofurans via a metal-free intramolecular radical cyclization/thiolation cascade reaction. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2021.1927098] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Tingting Chen
- School of Pharmaceutical and Materials Engineering, Taizhou University, Taizhou, People’s Republic of China
| | - Renhua Zheng
- School of Pharmaceutical and Materials Engineering, Taizhou University, Taizhou, People’s Republic of China
| | - Jingmiao Yu
- School of Pharmaceutical and Materials Engineering, Taizhou University, Taizhou, People’s Republic of China
- Institute for Advanced Studies, Taizhou University, Taizhou, People’s Republic of China
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Bergès J, Zaid Y, Tlili A, Sotiropoulos J, Taillefer M. Transition‐Metal‐Free Matsuda‐Heck Type Cross‐Coupling and Mechanistic Evidence for a Radical Mechanism. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100032] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Julien Bergès
- ICGM, Univ Montpellier, CNRS, ENSCM 34296 Montpellier France
| | - Yassir Zaid
- ICGM, Univ Montpellier, CNRS, ENSCM 34296 Montpellier France
| | - Anis Tlili
- Institute of Chemistry and Biochemistry (ICBMS – UMR CNRS 5246) CNRS INSA CPE-Lyon Université Lyon 1 1 Rue victor Grignard 69622 Villeurbanne France
| | | | - Marc Taillefer
- ICGM, Univ Montpellier, CNRS, ENSCM 34296 Montpellier France
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Altmann L, Zantop V, Wenisch P, Diesendorf N, Heinrich MR. Visible Light Promoted, Catalyst-Free Radical Carbohydroxylation and Carboetherification under Mild Biomimetic Conditions. Chemistry 2021; 27:2452-2462. [PMID: 33006177 PMCID: PMC7898656 DOI: 10.1002/chem.202004234] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Indexed: 11/25/2022]
Abstract
Metal and catalyst-free carbohydroxylations and carboetherifications at room temperature have been achieved by a combination of beneficial factors including high aryl diazonium concentration and visible light irradiation. The acceleration of the reaction by visible light irradiation is particularly remarkable against the background that neither the aryldiazonium salt nor the alkene show absorptions in the respective range of wavelength. These observations point to weak charge transfer interactions between diazonium salt and alkene, which are nevertheless able to considerably influence the reaction course. As highly promising perspective, many more aryldiazonium-based radical arylations might benefit from simple light irradiation without requiring a photocatalyst or particular additive.
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Affiliation(s)
- Lisa‐Marie Altmann
- Department of Chemistry and Pharmacy, Pharmaceutical ChemistryFriedrich-Alexander-Universität Erlangen-NürnbergNikolaus-Fiebiger-Str. 1091058ErlangenGermany
| | - Viviane Zantop
- Department of Chemistry and Pharmacy, Pharmaceutical ChemistryFriedrich-Alexander-Universität Erlangen-NürnbergNikolaus-Fiebiger-Str. 1091058ErlangenGermany
| | - Pia Wenisch
- Department of Chemistry and Pharmacy, Pharmaceutical ChemistryFriedrich-Alexander-Universität Erlangen-NürnbergNikolaus-Fiebiger-Str. 1091058ErlangenGermany
| | - Nina Diesendorf
- Department of Chemistry and Pharmacy, Pharmaceutical ChemistryFriedrich-Alexander-Universität Erlangen-NürnbergNikolaus-Fiebiger-Str. 1091058ErlangenGermany
| | - Markus R. Heinrich
- Department of Chemistry and Pharmacy, Pharmaceutical ChemistryFriedrich-Alexander-Universität Erlangen-NürnbergNikolaus-Fiebiger-Str. 1091058ErlangenGermany
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Ye Y, Chen H, Yao K, Gong H. Iron-Catalyzed Reductive Vinylation of Tertiary Alkyl Oxalates with Activated Vinyl Halides. Org Lett 2020; 22:2070-2075. [PMID: 32096641 DOI: 10.1021/acs.orglett.0c00561] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
We present herein a rare and efficient method for the creation of vinylated all carbon quaternary centers via Fe-catalyzed cross-electrophile coupling of vinyl halides with tertiary alkyl methyl oxalates. The reaction displays excellent functional group tolerance and broad substrate scope, which allows cascade radical cyclization and vinylation to afford complex bicyclic and spiral structural motifs. The reaction proceeds via tertiary alkyl radicals, and the putative vinyl-Br/Fe complexation appears to be crucial for activating the alkene and enabling a possibly concerted radical addition/C-Fe forming process.
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Affiliation(s)
- Yang Ye
- School of Materials Science and Engineering, Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, Shanghai University, Shanghai, China
| | - Haifeng Chen
- School of Materials Science and Engineering, Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, Shanghai University, Shanghai, China
| | - Ken Yao
- School of Materials Science and Engineering, Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, Shanghai University, Shanghai, China
| | - Hegui Gong
- School of Materials Science and Engineering, Center for Supramolecular Chemistry and Catalysis and Department of Chemistry, Shanghai University, Shanghai, China
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9
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Abdelwahab AB, El-Sawy ER, Kirsch G. Iron powder and tin/tin chloride as new reducing agents of Meerwein arylation reaction with unexpected recycling to anilines. SYNTHETIC COMMUN 2019. [DOI: 10.1080/00397911.2019.1704786] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Ahmed B. Abdelwahab
- Laboratoire Lorrain de Chimie Moléculaire (L.2.C.M.), Université de Lorraine, Metz, France
- Chemistry of Natural Compounds Department, National Research Centre, Dokki-Cairo, Egypt
- Plant Advanced Technologies (PAT), Vandoeuvre-lès-Nancy, France
| | - Eslam R. El-Sawy
- Laboratoire Lorrain de Chimie Moléculaire (L.2.C.M.), Université de Lorraine, Metz, France
- Chemistry of Natural Compounds Department, National Research Centre, Dokki-Cairo, Egypt
| | - Gilbert Kirsch
- Laboratoire Lorrain de Chimie Moléculaire (L.2.C.M.), Université de Lorraine, Metz, France
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Sumino S, Ryu I. Alkenylation and Allylation Reactions of Alkyl Halides Using Photo Catalyst. J SYN ORG CHEM JPN 2019. [DOI: 10.5059/yukigoseikyokaishi.77.406] [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)
- Shuhei Sumino
- Department of Chemistry, Osaka Prefecture University
| | - Ilhyong Ryu
- Department of Chemistry, Osaka Prefecture University
- Department of Applied Chemistry, National Chiao Tung University
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11
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Sumino S, Uno M, Huang HJ, Wu YK, Ryu I. Palladium/Light Induced Radical Alkenylation and Allylation of Alkyl Iodides Using Alkenyl and Allylic Sulfones. Org Lett 2018; 20:1078-1081. [PMID: 29405718 DOI: 10.1021/acs.orglett.7b04050] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Alkenylation and allylation of alkyl iodides with alkenyl and allyl sulfones, respectively, took place under Pd/photoirradiation system. The initial alkyl radical, derived from a single electron transfer between Pd(0) and RI, underwent the title transformations. Pd(0) was regenerated through a reductive elimination of PhSO2PdI, which is formed by the combination of the sulfonyl radical and the palladium radical. The addition of water was effective, presumably by pushing the equilibrium through hydrolysis of PhSO2I.
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Affiliation(s)
- Shuhei Sumino
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University , Sakai, Osaka 599-8531, Japan
| | - Misae Uno
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University , Sakai, Osaka 599-8531, Japan
| | - Hsin-Ju Huang
- Department of Applied Chemistry, National Chiao Tung University , Hsinchu, Taiwan
| | - Yen-Ku Wu
- Department of Applied Chemistry, National Chiao Tung University , Hsinchu, Taiwan
| | - Ilhyong Ryu
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University , Sakai, Osaka 599-8531, Japan.,Department of Applied Chemistry, National Chiao Tung University , Hsinchu, Taiwan
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12
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Hegmann N, Prusko L, Heinrich MR. Synthesis of Spirocyclohexadienones through Radical Cascade Reactions Featuring 3-Fold Carbon–Carbon Bond Formation. Org Lett 2017; 19:2222-2225. [DOI: 10.1021/acs.orglett.7b00676] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nina Hegmann
- Department of Chemistry and
Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schuhstraße 19, 91052 Erlangen, Germany
| | - Lea Prusko
- Department of Chemistry and
Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schuhstraße 19, 91052 Erlangen, Germany
| | - Markus R. Heinrich
- Department of Chemistry and
Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schuhstraße 19, 91052 Erlangen, Germany
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13
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Hassan H, Pirenne V, Wissing M, Khiar C, Hussain A, Robert F, Landais Y. Free-Radical Carbocyanation of Olefins. Chemistry 2017; 23:4651-4658. [DOI: 10.1002/chem.201605946] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Haitham Hassan
- Institute of Molecular Sciences; UMR-CNRS 5255; University of Bordeaux; 351, Cours de la libération 33405 Talence cedex France
| | - Vincent Pirenne
- Institute of Molecular Sciences; UMR-CNRS 5255; University of Bordeaux; 351, Cours de la libération 33405 Talence cedex France
| | - Maren Wissing
- Institute of Molecular Sciences; UMR-CNRS 5255; University of Bordeaux; 351, Cours de la libération 33405 Talence cedex France
| | - Chahinaz Khiar
- Institute of Molecular Sciences; UMR-CNRS 5255; University of Bordeaux; 351, Cours de la libération 33405 Talence cedex France
- Laboratoire de Chimie Appliquée et du Génie Chimique (LCAGC); Université Mouloud Mammerie de Tizi-Ouzou; 15000 Tizi-Ouzou Algeria
| | - Ashique Hussain
- Institute of Molecular Sciences; UMR-CNRS 5255; University of Bordeaux; 351, Cours de la libération 33405 Talence cedex France
| | - Frédéric Robert
- Institute of Molecular Sciences; UMR-CNRS 5255; University of Bordeaux; 351, Cours de la libération 33405 Talence cedex France
| | - Yannick Landais
- Institute of Molecular Sciences; UMR-CNRS 5255; University of Bordeaux; 351, Cours de la libération 33405 Talence cedex France
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14
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Sumino S, Ryu I. A Palladium/Light System Combined with Hanztsch Ester: Radical Vinylation of Alkyl Iodides with Vinyl Bromides. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600547] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Shuhei Sumino
- Department of ChemistryGraduate School of ScienceOsaka Prefecture University Sakai Osaka 599–8531 Japan
| | - Ilhyong Ryu
- Department of ChemistryGraduate School of ScienceOsaka Prefecture University Sakai Osaka 599–8531 Japan
- Department of Applied ChemistryNational Chiao Tung University Hsinchu Taiwan
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16
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Copper-catalyzed carbochlorination or carbobromination via radical cyclization of aryl amines. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.02.054] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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17
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Grossmann AS, Magauer T. Trihaloethenes as versatile building blocks for organic synthesis. Org Biomol Chem 2016; 14:5377-89. [DOI: 10.1039/c6ob00091f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Trihaloethenes are versatile C2-building blocks that can be simply modified via addition, elimination and transition metal-catalyzed reactions.
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Affiliation(s)
- Adriana S. Grossmann
- Department of Chemistry
- Ludwig-Maximilians-Universität München
- 81377 München
- Germany
| | - Thomas Magauer
- Department of Chemistry
- Ludwig-Maximilians-Universität München
- 81377 München
- Germany
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18
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Chen J, Shao Y, Zheng H, Cheng J, Wan X. Metal-Free Coupling of 2-Vinylphenols and Carboxylic Acids: An Access to 3-Acyloxy-2,3-dihydrobenzofurans. J Org Chem 2015; 80:10734-41. [DOI: 10.1021/acs.joc.5b01941] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jijun Chen
- Key Laboratory
of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical
Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
| | - Ying Shao
- Key Laboratory
of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical
Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
- Jiangsu
Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, P. R. China
| | - Hao Zheng
- Jiangsu
Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, P. R. China
| | - Jiang Cheng
- Jiangsu
Key Laboratory of Advanced Catalytic Materials and Technology, Changzhou University, Changzhou 213164, P. R. China
| | - Xiaobing Wan
- Key Laboratory
of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical
Engineering and Materials Science, Soochow University, Suzhou 215123, P. R. China
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19
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Lewis acid mediated diastereoselective intermolecular radical addition/trapping with pyrazolidinone acrylimides. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.02.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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20
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Hartmann M, Daniliuc CG, Studer A. Preparation of phenanthrenes from ortho-amino-biphenyls and alkynes via base-promoted homolytic aromatic substitution. Chem Commun (Camb) 2015; 51:3121-3. [DOI: 10.1039/c4cc10063h] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Phenanthrenes are prepared from ortho-aminobiphenyls and acetylenes via base-promoted homolytic aromatic substitution.
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Affiliation(s)
- Marcel Hartmann
- Organisch-Chemisches Institut
- Westfälische Wilhelms-Universität
- 48149 Münster
- Germany
| | | | - Armido Studer
- Organisch-Chemisches Institut
- Westfälische Wilhelms-Universität
- 48149 Münster
- Germany
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21
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Fehler SK, Pratsch G, Heinrich MR. Phenyldiazene - abgefangen in Cycloadditionsreaktionen. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406175] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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Fehler SK, Pratsch G, Heinrich MR. The trapping of phenyldiazenes in cycloaddition reactions. Angew Chem Int Ed Engl 2014; 53:11361-5. [PMID: 25154799 DOI: 10.1002/anie.201406175] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Indexed: 11/06/2022]
Abstract
The reactivity of phenyldiazenes was studied intensively in the late 1960s, but not much is known about their behavior under acidic conditions. Based on the formation of phenyldiazenes from phenylazocarboxylates, we herein describe how reactions of phenyldiazenes can be directed into ionic or radical pathways. Cycloaddition reactions with furans leading to pyridazinium salts represent the first examples for the direct trapping of phenyldiazenes with conservation of the N=N moiety.
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Affiliation(s)
- Stefanie K Fehler
- Department of Chemistry and Pharmacy, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schuhstrasse 19, 91052 Erlangen (Germany) http://www.medchem.uni-erlangen.de/heinrichlab/
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23
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Hartmann M, Studer A. Cyclizing Radical Carboiodination, Carbotelluration, and Carboaminoxylation of Aryl Amines. Angew Chem Int Ed Engl 2014; 53:8180-3. [DOI: 10.1002/anie.201403968] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Indexed: 12/31/2022]
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Hartmann M, Studer A. Cyclisierende radikalische Carboiodierung, Carbotellurierung und Carboaminoxylierung von Arylaminen. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201403968] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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A chiral benzoylthiourea–pyrrolidine catalyst for the highly enantioselective Michael addition of ketones to chalcones. Bioorg Med Chem Lett 2014; 24:2517-20. [DOI: 10.1016/j.bmcl.2014.04.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Revised: 03/19/2014] [Accepted: 04/02/2014] [Indexed: 11/23/2022]
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Bonin H, Sauthier M, Felpin FX. Transition Metal-Mediated Direct CH Arylation of Heteroarenes Involving Aryl Radicals. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300865] [Citation(s) in RCA: 116] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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Kippo T, Kimura Y, Maeda A, Matsubara H, Fukuyama T, Ryu I. Radical vinylation of dioxolanes and N-acylpyrrolidines using vinyl bromides. Org Chem Front 2014. [DOI: 10.1039/c4qo00138a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Radical vinylation of 1,3-dioxolanes and N-acylpyrrolidines using vinyl bromides with an electron-withdrawing substituent proceeded well to give the vinylated products.
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Affiliation(s)
- Takashi Kippo
- Department of Chemistry
- Graduate School of Science
- Osaka Prefecture University
- Sakai, Japan
| | - Yuki Kimura
- Department of Chemistry
- Graduate School of Science
- Osaka Prefecture University
- Sakai, Japan
| | - Ayami Maeda
- Department of Chemistry
- Graduate School of Science
- Osaka Prefecture University
- Sakai, Japan
| | - Hiroshi Matsubara
- Department of Chemistry
- Graduate School of Science
- Osaka Prefecture University
- Sakai, Japan
| | - Takahide Fukuyama
- Department of Chemistry
- Graduate School of Science
- Osaka Prefecture University
- Sakai, Japan
| | - Ilhyong Ryu
- Department of Chemistry
- Graduate School of Science
- Osaka Prefecture University
- Sakai, Japan
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