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Sedano C, Velasco R, Feberero C, Suárez-Pantiga S, Sanz R. α-Lithiobenzyloxy as a Directed Metalation Group in ortho-Lithiation Reactions. Org Lett 2020; 22:6365-6369. [DOI: 10.1021/acs.orglett.0c02199] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Carlos Sedano
- Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001-Burgos, Spain
| | - Rocío Velasco
- Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001-Burgos, Spain
| | - Claudia Feberero
- Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001-Burgos, Spain
| | - Samuel Suárez-Pantiga
- Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001-Burgos, Spain
| | - Roberto Sanz
- Área de Química Orgánica, Departamento de Química, Facultad de Ciencias, Universidad de Burgos, Pza. Misael Bañuelos s/n, 09001-Burgos, Spain
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2
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Feberero C, Velasco R, Sanz R. ortho-Lithiation Reactions ofO-(3,n-Dihalophenyl)N,N-Diethylcarbamates: Synthesis of Dihalosalicylamides and 2,3,n-Trihalophenol Derivatives. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600933] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Claudia Feberero
- Área de Química Orgánica; Departamento de Química; Facultad de Ciencias; Universidad de Burgos; Pza. Misael Bañuelos s/n 09001 Burgos Spain
| | - Rocío Velasco
- Área de Química Orgánica; Departamento de Química; Facultad de Ciencias; Universidad de Burgos; Pza. Misael Bañuelos s/n 09001 Burgos Spain
| | - Roberto Sanz
- Área de Química Orgánica; Departamento de Química; Facultad de Ciencias; Universidad de Burgos; Pza. Misael Bañuelos s/n 09001 Burgos Spain
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3
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Liu KM, Zhang R, Duan XF. Room-temperature cobalt-catalyzed arylation of aromatic acids: overriding the ortho-selectivity via the oxidative assembly of carboxylate and aryl titanate reagents using oxygen. Org Biomol Chem 2016; 14:1593-8. [DOI: 10.1039/c5ob02496j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A room temperature phosphine or NHC ligand-free cobalt-catalyzed arylation of (hetero)aromatic acids has been developed.
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Affiliation(s)
- Kun-Ming Liu
- College of Chemistry
- Beijing Normal University
- Beijing
- P. R. China
| | - Rui Zhang
- College of Chemistry
- Beijing Normal University
- Beijing
- P. R. China
| | - Xin-Fang Duan
- College of Chemistry
- Beijing Normal University
- Beijing
- P. R. China
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4
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Belaud-Rotureau M, Castanet AS, Nguyen TH, Mortier J. Uncatalyzed CO2Li-Mediated SNAr Reaction of Unprotected Benzoic Acids via Silicon Trickery. Aust J Chem 2016. [DOI: 10.1071/ch15398] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The alkyl and aryllithium nucleophilic aromatic substitution (SNAr) displacement of a fluoro or methoxy group from unprotected 2-fluoro/methoxybenzoic acids is discussed. It was discovered that a TMS group located at the C6-position ortho to the carboxyl group shields effectively the carboxylate against nucleophilic attack, thus reducing dramatically ketone formation, and reorients nucleophilic substitution to the C2-position. The reactions with fluoro-substituted substrate 7 proceed efficiently; in contrast, the use of methoxy-functionalized benzoic acid 8 only affords moderate yields with s-BuLi and PhLi. This uncatalyzed coupling reaction, which provides a direct access to biaryl compounds, presumably proceeds by an addition–elimination sequence via intermediate formation of a resonance-stabilized pentavalent silalactone-Meisenheimer complex.
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5
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Nogi K, Fujihara T, Terao J, Tsuji Y. Cobalt- and Nickel-Catalyzed Carboxylation of Alkenyl and Sterically Hindered Aryl Triflates Utilizing CO2. J Org Chem 2015; 80:11618-23. [DOI: 10.1021/acs.joc.5b02307] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Keisuke Nogi
- Department of Energy and
Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Tetsuaki Fujihara
- Department of Energy and
Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Jun Terao
- Department of Energy and
Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yasushi Tsuji
- Department of Energy and
Hydrocarbon Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
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6
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Kolis SP, Hansen MM, Arslantas E, Brändli L, Buser J, DeBaillie AC, Frederick AL, Hoard DW, Hollister A, Huber D, Kull T, Linder RJ, Martin TJ, Richey RN, Stutz A, Waibel M, Ward JA, Zamfir A. Synthesis of BACE Inhibitor LY2886721. Part I. An Asymmetric Nitrone Cycloaddition Strategy. Org Process Res Dev 2015. [DOI: 10.1021/op500351q] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stanley P. Kolis
- Small
Molecule Design and Development, Lilly Research Laboratories, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Marvin M. Hansen
- Small
Molecule Design and Development, Lilly Research Laboratories, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Enver Arslantas
- Dottikon Exclusive
Synthesis AG, P.O. Box 5605, Dottikon, Switzerland
| | - Lukas Brändli
- Dottikon Exclusive
Synthesis AG, P.O. Box 5605, Dottikon, Switzerland
| | - Jonas Buser
- Small
Molecule Design and Development, Lilly Research Laboratories, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Amy C. DeBaillie
- Small
Molecule Design and Development, Lilly Research Laboratories, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Andrea L. Frederick
- Small
Molecule Design and Development, Lilly Research Laboratories, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - David W. Hoard
- Small
Molecule Design and Development, Lilly Research Laboratories, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Adrienne Hollister
- Small
Molecule Design and Development, Lilly Research Laboratories, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Dominique Huber
- Dottikon Exclusive
Synthesis AG, P.O. Box 5605, Dottikon, Switzerland
| | - Thomas Kull
- Dottikon Exclusive
Synthesis AG, P.O. Box 5605, Dottikon, Switzerland
| | - Ryan J. Linder
- Small
Molecule Design and Development, Lilly Research Laboratories, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Thomas J. Martin
- Dottikon Exclusive
Synthesis AG, P.O. Box 5605, Dottikon, Switzerland
| | - Rachel N. Richey
- Small
Molecule Design and Development, Lilly Research Laboratories, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Alfred Stutz
- Dottikon Exclusive
Synthesis AG, P.O. Box 5605, Dottikon, Switzerland
| | - Michael Waibel
- Dottikon Exclusive
Synthesis AG, P.O. Box 5605, Dottikon, Switzerland
| | - Jeffrey A. Ward
- Small
Molecule Design and Development, Lilly Research Laboratories, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Alexandru Zamfir
- Dottikon Exclusive
Synthesis AG, P.O. Box 5605, Dottikon, Switzerland
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7
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Chen YM, Chass GA, Fang DC. Between a reactant rock and a solvent hard place – molecular corrals guide aromatic substitutions. Phys Chem Chem Phys 2014; 16:1078-83. [DOI: 10.1039/c3cp54079k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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8
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9
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Crosbie E, Kennedy AR, Mulvey RE, Robertson SD. After-effects of lithium-mediated alumination of 3-iodoanisole: isolation of molecular salt elimination and trapped-benzyne products. Dalton Trans 2012; 41:1832-9. [DOI: 10.1039/c2dt11893a] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Aissaoui R, Nourry A, Coquel A, Dao TTH, Derdour A, Helesbeux JJ, Duval O, Castanet AS, Mortier J. ortho-Lithium/Magnesium Carboxylate-Driven Aromatic Nucleophilic Substitution Reactions on Unprotected Naphthoic Acids. J Org Chem 2011; 77:718-24. [DOI: 10.1021/jo202017z] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Regadia Aissaoui
- Unité de Chimie Organique
Moléculaire et Macromoléculaire (UMR 6011), Faculté
des Sciences, Université du Maine and CNRS, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
- Laboratoire de Synthèse
Organique Appliquée, Université d’Oran Es-Senia, Oran 31000, Algeria
| | - Arnaud Nourry
- Unité de Chimie Organique
Moléculaire et Macromoléculaire (UMR 6011), Faculté
des Sciences, Université du Maine and CNRS, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
| | - Ariane Coquel
- Unité de Chimie Organique
Moléculaire et Macromoléculaire (UMR 6011), Faculté
des Sciences, Université du Maine and CNRS, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
- Laboratoire SONAS, Faculté
de Pharmacie, Université d’Angers, 49100 Angers, France
| | - Thi Thanh Hà Dao
- Laboratoire SONAS, Faculté
de Pharmacie, Université d’Angers, 49100 Angers, France
| | - Aicha Derdour
- Laboratoire de Synthèse
Organique Appliquée, Université d’Oran Es-Senia, Oran 31000, Algeria
| | | | - Olivier Duval
- Laboratoire SONAS, Faculté
de Pharmacie, Université d’Angers, 49100 Angers, France
| | - Anne-Sophie Castanet
- Unité de Chimie Organique
Moléculaire et Macromoléculaire (UMR 6011), Faculté
des Sciences, Université du Maine and CNRS, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
| | - Jacques Mortier
- Unité de Chimie Organique
Moléculaire et Macromoléculaire (UMR 6011), Faculté
des Sciences, Université du Maine and CNRS, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
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11
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Genna DT, Posner GH. Cyanocuprates Convert Carboxylic Acids Directly into Ketones. Org Lett 2011; 13:5358-61. [DOI: 10.1021/ol202237j] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Douglas T Genna
- Department of Chemistry, School of Arts and Sciences, The Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218-2685, United States
| | - Gary H. Posner
- Department of Chemistry, School of Arts and Sciences, The Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218-2685, United States
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12
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Belaud-Rotureau M, Le TT, Phan THT, Nguyen TH, Aissaoui R, Gohier F, Derdour A, Nourry A, Castanet AS, Nguyen KPP, Mortier J. Synthesis of N-Aryl and N-Alkyl Anthranilic Acids via SNAr Reaction of Unprotected 2-Fluoro- and 2-Methoxybenzoic Acids by Lithioamides. Org Lett 2010; 12:2406-9. [DOI: 10.1021/ol1007586] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mickaël Belaud-Rotureau
- Université du Maine and CNRS, Unité de Chimie Organique Moléculaire and Macromoléculaire (UMR 6011), Faculté des Sciences, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France, Université Nationale de Ho-Chi-Minh-Ville, École des Sciences Naturelles, Laboratoire de Chimie Organique, 283/2 Nguyen Van Cu. arrondissement 5, Ho Chi Minh Ville, Viet Nam, and Université d’Oran Es-Senia, Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences, BP 1524 Es-Senia, Oran 31000, Algeria
| | - Tin Thanh Le
- Université du Maine and CNRS, Unité de Chimie Organique Moléculaire and Macromoléculaire (UMR 6011), Faculté des Sciences, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France, Université Nationale de Ho-Chi-Minh-Ville, École des Sciences Naturelles, Laboratoire de Chimie Organique, 283/2 Nguyen Van Cu. arrondissement 5, Ho Chi Minh Ville, Viet Nam, and Université d’Oran Es-Senia, Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences, BP 1524 Es-Senia, Oran 31000, Algeria
| | - Thi Huong Thu Phan
- Université du Maine and CNRS, Unité de Chimie Organique Moléculaire and Macromoléculaire (UMR 6011), Faculté des Sciences, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France, Université Nationale de Ho-Chi-Minh-Ville, École des Sciences Naturelles, Laboratoire de Chimie Organique, 283/2 Nguyen Van Cu. arrondissement 5, Ho Chi Minh Ville, Viet Nam, and Université d’Oran Es-Senia, Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences, BP 1524 Es-Senia, Oran 31000, Algeria
| | - Thi Huu Nguyen
- Université du Maine and CNRS, Unité de Chimie Organique Moléculaire and Macromoléculaire (UMR 6011), Faculté des Sciences, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France, Université Nationale de Ho-Chi-Minh-Ville, École des Sciences Naturelles, Laboratoire de Chimie Organique, 283/2 Nguyen Van Cu. arrondissement 5, Ho Chi Minh Ville, Viet Nam, and Université d’Oran Es-Senia, Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences, BP 1524 Es-Senia, Oran 31000, Algeria
| | - Regadia Aissaoui
- Université du Maine and CNRS, Unité de Chimie Organique Moléculaire and Macromoléculaire (UMR 6011), Faculté des Sciences, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France, Université Nationale de Ho-Chi-Minh-Ville, École des Sciences Naturelles, Laboratoire de Chimie Organique, 283/2 Nguyen Van Cu. arrondissement 5, Ho Chi Minh Ville, Viet Nam, and Université d’Oran Es-Senia, Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences, BP 1524 Es-Senia, Oran 31000, Algeria
| | - Frédéric Gohier
- Université du Maine and CNRS, Unité de Chimie Organique Moléculaire and Macromoléculaire (UMR 6011), Faculté des Sciences, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France, Université Nationale de Ho-Chi-Minh-Ville, École des Sciences Naturelles, Laboratoire de Chimie Organique, 283/2 Nguyen Van Cu. arrondissement 5, Ho Chi Minh Ville, Viet Nam, and Université d’Oran Es-Senia, Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences, BP 1524 Es-Senia, Oran 31000, Algeria
| | - Aïcha Derdour
- Université du Maine and CNRS, Unité de Chimie Organique Moléculaire and Macromoléculaire (UMR 6011), Faculté des Sciences, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France, Université Nationale de Ho-Chi-Minh-Ville, École des Sciences Naturelles, Laboratoire de Chimie Organique, 283/2 Nguyen Van Cu. arrondissement 5, Ho Chi Minh Ville, Viet Nam, and Université d’Oran Es-Senia, Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences, BP 1524 Es-Senia, Oran 31000, Algeria
| | - Arnaud Nourry
- Université du Maine and CNRS, Unité de Chimie Organique Moléculaire and Macromoléculaire (UMR 6011), Faculté des Sciences, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France, Université Nationale de Ho-Chi-Minh-Ville, École des Sciences Naturelles, Laboratoire de Chimie Organique, 283/2 Nguyen Van Cu. arrondissement 5, Ho Chi Minh Ville, Viet Nam, and Université d’Oran Es-Senia, Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences, BP 1524 Es-Senia, Oran 31000, Algeria
| | - Anne-Sophie Castanet
- Université du Maine and CNRS, Unité de Chimie Organique Moléculaire and Macromoléculaire (UMR 6011), Faculté des Sciences, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France, Université Nationale de Ho-Chi-Minh-Ville, École des Sciences Naturelles, Laboratoire de Chimie Organique, 283/2 Nguyen Van Cu. arrondissement 5, Ho Chi Minh Ville, Viet Nam, and Université d’Oran Es-Senia, Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences, BP 1524 Es-Senia, Oran 31000, Algeria
| | - Kim Phi Phung Nguyen
- Université du Maine and CNRS, Unité de Chimie Organique Moléculaire and Macromoléculaire (UMR 6011), Faculté des Sciences, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France, Université Nationale de Ho-Chi-Minh-Ville, École des Sciences Naturelles, Laboratoire de Chimie Organique, 283/2 Nguyen Van Cu. arrondissement 5, Ho Chi Minh Ville, Viet Nam, and Université d’Oran Es-Senia, Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences, BP 1524 Es-Senia, Oran 31000, Algeria
| | - Jacques Mortier
- Université du Maine and CNRS, Unité de Chimie Organique Moléculaire and Macromoléculaire (UMR 6011), Faculté des Sciences, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France, Université Nationale de Ho-Chi-Minh-Ville, École des Sciences Naturelles, Laboratoire de Chimie Organique, 283/2 Nguyen Van Cu. arrondissement 5, Ho Chi Minh Ville, Viet Nam, and Université d’Oran Es-Senia, Laboratoire de Synthèse Organique Appliquée, Faculté des Sciences, BP 1524 Es-Senia, Oran 31000, Algeria
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Yamada K, Taguchi H, Ohkubo A, Seio K, Sekine M. Synthesis and properties of nucleoside derivatives acylated by chemically stable 2-(trimethylsilyl)benzoyl group. Bioorg Med Chem 2009; 17:5928-32. [DOI: 10.1016/j.bmc.2009.07.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2009] [Revised: 07/01/2009] [Accepted: 07/02/2009] [Indexed: 10/20/2022]
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Branca M, Pena S, Guillot R, Gori D, Alezra V, Kouklovsky C. Memory of Chirality of Tertiary Aromatic Amides: A Simple and Efficient Method for the Enantioselective Synthesis of Quaternary α-Amino Acids. J Am Chem Soc 2009; 131:10711-8. [DOI: 10.1021/ja9039604] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mathieu Branca
- Laboratoire de Chimie des Procédés et Substances Naturelles, ICMMO, CNRS UMR 8182, Bât 410, Université de Paris-Sud, F-91405 Orsay, France
| | - Sébastien Pena
- Laboratoire de Chimie des Procédés et Substances Naturelles, ICMMO, CNRS UMR 8182, Bât 410, Université de Paris-Sud, F-91405 Orsay, France
| | - Régis Guillot
- Laboratoire de Chimie des Procédés et Substances Naturelles, ICMMO, CNRS UMR 8182, Bât 410, Université de Paris-Sud, F-91405 Orsay, France
| | - Didier Gori
- Laboratoire de Chimie des Procédés et Substances Naturelles, ICMMO, CNRS UMR 8182, Bât 410, Université de Paris-Sud, F-91405 Orsay, France
| | - Valérie Alezra
- Laboratoire de Chimie des Procédés et Substances Naturelles, ICMMO, CNRS UMR 8182, Bât 410, Université de Paris-Sud, F-91405 Orsay, France
| | - Cyrille Kouklovsky
- Laboratoire de Chimie des Procédés et Substances Naturelles, ICMMO, CNRS UMR 8182, Bât 410, Université de Paris-Sud, F-91405 Orsay, France
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15
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Chau NTT, Nguyen TH, Castanet AS, Nguyen KPP, Mortier J. Competition of substituents for ortho direction of metalation of veratric acid. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.08.086] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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16
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Combined directed ortho-metalation, remote metalation, and Stille cross-coupling strategies. Concise stereoselective synthesis of polysubstituted 9H-fluoren-9-ones. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.01.122] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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17
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Nguyen TH, Chau NTT, Castanet AS, Nguyen KPP, Mortier J. First General, Direct, and Regioselective Synthesis of Substituted Methoxybenzoic Acids by Ortho Metalation. J Org Chem 2007; 72:3419-29. [PMID: 17391047 DOI: 10.1021/jo070082a] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
New general methodology of value in aromatic chemistry based on ortho-metalation sites in o-, m-, and p-anisic acids (1-3) (Scheme 1) is described. The metalation can be selectively directed to either of the ortho positions by varying the base, metalation temperature, and exposure times. Metalation of o-anisic acid (1) with s-BuLi/TMEDA in THF at -78 degrees C occurs exclusively in the position adjacente to the carboxylate. On the other hand, a reversal of regioselectivity is observed with n-BuLi/t-BuOK. With LTMP at 0 degrees C, the two directors of m-anisic acid (2) function in concert to direct introduction of the metal between them while n-BuLi/t-BuOK removes preferentially the proton located ortho to the methoxy and para to the carboxylate (H-4). s-BuLi/TMEDA reacts with p-anisic acid (3) exclusively in the vicinity of the carboxylate. According to these methodologies, routes to very simple methoxybenzoic acids with a variety of functionalities that are not easily accessible by other means have been developed (Table 1).
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Affiliation(s)
- Thi-Huu Nguyen
- Université du Maine and CNRS, Unité de chimie organique moléculaire et macromoléculaire (UMR 6011), Faculté des sciences, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
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Luliński S, Serwatowski J, Zaczek A. Long-Range Effects in the Metalation/Boronation of Functionalized 1,4-Dihalobenzenes. European J Org Chem 2006. [DOI: 10.1002/ejoc.200600541] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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20
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Nguyen TH, Castanet AS, Mortier J. Directed Ortho-Metalation of Unprotected Benzoic Acids. Methodology and Regioselective Synthesis of Useful Contiguously 3- and 6-Substituted 2-Methoxybenzoic Acid Building Blocks. Org Lett 2006; 8:765-8. [PMID: 16468762 DOI: 10.1021/ol0530427] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] By treatment with s-BuLi/TMEDA at -78 degrees C, unprotected 2-methoxybenzoic acid is deprotonated exclusively in the position ortho to the carboxylate. A reversal of regioselectivity is observed when the acid is treated with n-BuLi/t-BuOK. These results are of general utility for the one-pot preparation of a variety of very simple 3- and 6-substituted 2-methoxybenzoic acids that are not easily accessible by conventional means. The potential usefulness of the method is demonstrated by the expedient synthesis of lunularic acid.
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Affiliation(s)
- Thi-Huu Nguyen
- Université du Maine and CNRS, Unité de Chimie Organique Moléculaire et Macromoléculaire (UMR 6011), Faculté des Sciences, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
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The Expedient and Regioselective Metalation of Unprotected Biphenyl-2-, -3-, and -4-carboxylic Acids. European J Org Chem 2006. [DOI: 10.1002/ejoc.200500469] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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22
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Nguyen TH, Chau NTT, Castanet AS, Nguyen KPP, Mortier J. Toward a Better Understanding on the Mechanism of Ortholithiation. Tuning of Selectivities in the Metalation ofmeta-Anisic Acid by an Appropriate Choice of Base. Org Lett 2005; 7:2445-8. [PMID: 15932219 DOI: 10.1021/ol050761c] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] If employed in THF at 0 degrees C, LTMP metalates meta-anisic acid at the doubly activated position. In contrast, n-BuLi/t-BuOK deprotonates position C-4 preferentially at low temperature. Functionalization at C-6 requires protection of the C-2 site beforehand. As a result of these findings, a new mechanism is proposed for the heteroatom-directed ortholithiation of aromatic compounds.
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Affiliation(s)
- Thi-Huu Nguyen
- Unité de Chimie Organique Moléculaire et Macromoléculaire (UMR 6011), Faculté des Sciences, Université du Maine and CNRS, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
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23
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Tilly D, Castanet AS, Mortier J. Controlling Chemoselectivity in Reactions of Unprotected Naphthalene-1-carboxylic Acid with Strong Bases. CHEM LETT 2005. [DOI: 10.1246/cl.2005.446] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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24
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Gohier F, Castanet A, Mortier J. Ortholithiation of Unprotected Benzoic Acids: Application for Novel 2‐Chloro‐6‐Substituted Benzoic Acid Syntheses. SYNTHETIC COMMUN 2005. [DOI: 10.1081/scc-200050946] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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25
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Tilly D, Samanta SS, De A, Castanet AS, Mortier J. Contribution to the Study of the Mechanism of Directed Remote-Metalation. Evidence for the Intermediacy of a Geminal Dimetallo Dialkoxide C(OM)2 (M = Li, K), First Doubly Charged Director of Ortho Metalation. Org Lett 2005; 7:827-30. [PMID: 15727451 DOI: 10.1021/ol0474709] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mechanism of the metalation of 2-biphenyl carboxylic acid (1) with the Lochmann-Schlosser superbase was determined by deuteriolysis. Both ortho (C(3)) and remote (C(2')) positions are metalated. The C(2')-metalated species 2 cyclizes instantaneously. Under suitable conditions, the doubly charged geminal dimetallo dialkoxide group C(OM)(2) 4 directs metalation in the adjacent position (C(1)), affording a stable 1-metallo-9H-fluorene-9,9-dimetallo dialkoxide 5 that can be trapped by diverse electrophiles to give 1-substituted 9H-fluoren-9-ones 7 and 9 after acidic workup. [structure: see text]
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Affiliation(s)
- David Tilly
- Université du Maine and CNRS, Unité de Chimie Organique Moléculaire et Macromoléculaire (UMR 6011), Faculté des Sciences, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
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26
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Gohier F, Castanet AS, Mortier J. The First Regioselective Metalation and Functionalization of Unprotected 4-Halobenzoic Acids. J Org Chem 2005; 70:1501-4. [PMID: 15704996 DOI: 10.1021/jo0483365] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] By treatment with s-BuLi, s-BuLi/TMEDA, or t-BuLi at approximately -78 degrees C, 4-fluoro- and 4-chlorobenzoic acids (1a,b) are metalated preferentially in the position adjacent to the carboxylate. A complete reversal in regioselectivity is observed for 1a when treated with LTMP; a sequential process involving a rapid intraaggregate lithiation through a quasi dianion complex "QUADAC" is postulated to explain the unusual reactivity of Me(2)S(2) and I(2).
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Affiliation(s)
- Frédéric Gohier
- Université du Maine and CNRS, Unité de chimie organique moléculaire et macromoléculaire (UMR 6011), Faculté des sciences, avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
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Ramallal AM, Fernández I, López Ortiz F, González J. Mechanism of Anionic Dearomatizing Reactions of Diphenylphosphinamide Derivatives: A Theoretical and Experimental Study. Chemistry 2005; 11:3022-31. [PMID: 15761841 DOI: 10.1002/chem.200400987] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The mechanism of the anionic dearomatisation of phosphinamide derivatives has been investigated both theoretically and experimentally. The potential-energy surface of model reactions was studied at the Becke3LYP/6-31+G* level of theory, and according to this study, a pre-reactive complex is formed between the alkyllithium and the phosphinamide. This complex evolves preferentially through NC(alpha)-metalation of the phosphinamide. The intramolecular nucleophilic addition of the carbanion to the ortho position of the aromatic ring leads to the dearomatised products, in a reaction that has been shown to be under thermodynamic control. Coordinating co-solvents, such as hexamethyl phosphoramide (HMPA) or N,N'-dimethyl-N,N'-propylene urea (DMPU), appear to influence the reaction by favouring the formation of solvent-separated ion pairs. The cyclisation reaction of allylphosphinamide derivatives was also studied. It was found that both the alpha- and gamma-attack of the allyl anion can take place, however the formation of the seven-membered ring products derived from the gamma-attack are clearly favoured.
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Affiliation(s)
- Antonio Morán Ramallal
- Departamento de Química Orgánica e Inorgánica, Universidad de Oviedo c/Julián Clavería 8, 33006 Oviedo, Spain
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28
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Schlosser M. The 2×3 Toolbox of Organometallic Methods for Regiochemically Exhaustive Functionalization. Angew Chem Int Ed Engl 2004; 44:376-93. [PMID: 15558637 DOI: 10.1002/anie.200300645] [Citation(s) in RCA: 248] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
This review describes a concept aimed at rational and maximal structure proliferation. To this end, simple aromatic or heterocyclic starting materials, often bulk chemicals, are converted into all regionisomerically possible polar organometallic intermediates (mostly lithiated species), which then may be combined with any of the countless electrophiles to provide attractive new building blocks, particularly functionalized derivatives. The practical implementation relies on a set ("toolbox") of sophisticated recipes developed by mechanistically guided modification of the two most prominent exchange methods used for the generation of polar organometallic compounds: hydrogen-metal and halogen-metal interconversion. These mutant methods ("old methods in a new outfit") amplify the existing options for organic synthesis by ensuring maximum regioflexibility. At the same time they offer new insight into factors that govern organometallic reactivity and provide hints on how to alter or finetune this reactivity judiciously.
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Affiliation(s)
- Manfred Schlosser
- Institute of Chemical Sciences, Ecole Polytechnique Fédérale, BCh, CH-1015 Lausanne, Switzerland.
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Schlosser M. Der 2×3-Werkzeugkasten der metallorganischen Methoden zur regiochemisch erschöpfenden Funktionalisierung. Angew Chem Int Ed Engl 2004. [DOI: 10.1002/ange.200300645] [Citation(s) in RCA: 102] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Fernández I, González J, López-Ortiz F. Deuterium-Labeling and NMR Study of the Dearomatization of N-Alkyl-N-benzyldiphenylphosphinamides through Anionic Cyclization: Ortho and Benzylic Lithiation Directed by Complex-Induced Proximity Effects. J Am Chem Soc 2004; 126:12551-64. [PMID: 15453788 DOI: 10.1021/ja039863t] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The mechanism of the anionic cyclization dearomatizing reaction of N-benzyl-N-methyldiphenylphosphinamide (1) upon treatment with s-BuLi in tetrahydrofuran (THF) at -90 degrees C has been analyzed by deuterium-labeling and natural abundance multinuclear magnetic resonance ((1)H, (2)H, (7)Li, (13)C, (31)P) studies. In the absence of coordinating cosolvents such as hexamethylphosphoramide (HMPA), eight major anionic species were identified, which allowed us to unravel the pathway of the metalation reaction. In agreement with the complex-induced proximity effect (CIPE) mechanism, the sequence of transformations emerging from this study involves the coordination of the lithium base to the P=O group of 1 to give four dimeric precomplexes whose NMR data are consistent with structures Va/Vb and VIIIa/VIIIb. The diastereomers Va/Vb are the precursors of the monomeric benzylic anion II, whereas the VIIIa/VIIIb diastereomers are assumed to undergo ortho deprotonation leading to anions I. Translocation from the ortho anion to the benzylic one is not observed. Intramolecular conjugate addition of anion II to the P-phenyl rings happens in a reversible way, affording the monomeric dearomatized anions III, IV, VI, and VII. The reaction progresses to yield a mixture containing only the species I, III, and IV. HMPA acts as a catalyst for the ortho-to-benzylic translocation and anionic cyclization reactions. Two-dimensional (2D) (7)Li,(31)P[(1)H] shift correlations and (7)Li[(31)P] NMR spectra proved to be crucial for the structural assignment of the anionic species. These techniques also demonstrated the diastereotopicity of the two achiral ligands involved in a dimer with s-BuLi (Vb) owing to the slow configuration inversion of the carbanion center.
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Affiliation(s)
- Ignacio Fernández
- Area de Química Orgánica, Universidad de Almería, Carretera de Sacramento s/n, Almería, Spain
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31
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Reed MA, Chang MT, Snieckus V. Anionic O → α- and β-Vinyl Carbamoyl Translocation of 2-(O-Carbamoyl) Stilbenes. Org Lett 2004; 6:2297-300. [PMID: 15228263 DOI: 10.1021/ol049740t] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] New anionic oxygen to alpha- and beta-vinyl carbamoyl migration reactions, 17a and 26a-c --> 18 and 30a-c, proceed under LDA-mediated conditions leading stereoselectively to highly substituted stilbenes bearing electron-donating and -withdrawing substituents. Compounds 17a and 26a-c are prepared by combination of efficient, directed ortho metalation, Sonogashira, and Suzuki-Miyaura cross-coupling procedures.
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Affiliation(s)
- Mark A Reed
- Department of Chemistry, Queen's University, Kingston, ON, K7L 3N6, Canada
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Rebstock AS, Mongin F, Trécourt F, Quéguiner G. Regioselectivities in deprotonation of 2-(4-chloro-2-pyridyl)benzoic acid and corresponding ester and amide. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.01.050] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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