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Freeman EE, Jackson R, Luo J, Somwaru R, Sons AA, Bean A, Buckle RN, Herr RJ. A Three-Step Method for the Preparation of N-Substituted 3,4-Dihydroisoquinolin-1(2 H)-ones and Heteroaryl-Fused 3,4-Dihydropyridin-2(1 H)-ones from 2-Bromobenzoate Precursors. J Org Chem 2023; 88:2589-2598. [PMID: 36706424 DOI: 10.1021/acs.joc.2c02670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
We demonstrate a general method for the preparation of diverse N-substituted 3,4-dihydroisoquinolin-1(2H)-one compounds through an overall three-step cross-coupling/cyclization/N-deprotection/N-alkylation sequence. In the first step, ethyl 2-bromobenzoates and 2-bromo-1-carboxyethyl heterocycles are cross-coupled with commercially available potassium (2-((tert-butoxycarbonyl)amino)ethyl)trifluoroborate to produce (hetero)aryl-substituted 3-[(N-Boc-2-carboxyethyl)phenyl]ethylamines. In a subsequent two-stage process, these (hetero)arylethylamines undergo base-mediated ring closure followed by N-deprotection and N-alkylation to produce N-substituted 3,4-dihydroisoquinolin-1(2H)-ones and heteroaryl-fused N-benzyl 3,4-dihydropyridin-2(1H)-ones. Mechanistic work was performed to elucidate the order of transformations for the latter two-stage process. The method was also extended to the production of N-benzyl isoindolin-1-one and N-benzyl 2,3,4,5-tetrahydro-1H-benzo[c]azepin-1-one.
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Affiliation(s)
- Emily E Freeman
- Medicinal Chemistry Department, Curia Global, Inc., 26 Corporate Circle, Albany, New York 12203, United States
| | - Randy Jackson
- Medicinal Chemistry Department, Curia Global, Inc., 26 Corporate Circle, Albany, New York 12203, United States
| | - Jessica Luo
- Medicinal Chemistry Department, Curia Global, Inc., 26 Corporate Circle, Albany, New York 12203, United States
| | - Rajen Somwaru
- Medicinal Chemistry Department, Curia Global, Inc., 26 Corporate Circle, Albany, New York 12203, United States
| | - Alex A Sons
- Medicinal Chemistry Department, Curia Global, Inc., 26 Corporate Circle, Albany, New York 12203, United States
| | - Andrew Bean
- Medicinal Chemistry Department, Curia Global, Inc., 26 Corporate Circle, Albany, New York 12203, United States
| | - Ronald N Buckle
- Medicinal Chemistry Department, Curia Global, Inc., 26 Corporate Circle, Albany, New York 12203, United States
| | - R Jason Herr
- Medicinal Chemistry Department, Curia Global, Inc., 26 Corporate Circle, Albany, New York 12203, United States
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2
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Ming W, Soor HS, Liu X, Trofimova A, Yudin AK, Marder TB. α-Aminoboronates: recent advances in their preparation and synthetic applications. Chem Soc Rev 2021; 50:12151-12188. [PMID: 34585200 DOI: 10.1039/d1cs00423a] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
α-Aminoboronic acids and their derivatives are useful as bioactive agents. Thus far, three compounds containing an α-aminoboronate motif have been approved by the Food and Drug Administration (FDA) as protease inhibitors, and more are currently undergoing clinical trials. In addition, α-aminoboronic acids and their derivatives have found applications in organic synthesis, e.g. as α-aminomethylation reagents for the synthesis of chiral nitrogen-containing molecules, as nucleophiles for preparing valuable vicinal amino alcohols, and as bis-nucleophiles in the construction of valuable small molecule scaffolds. This review summarizes new methodology for the preparation of α-aminoboronates, including highlights of asymmetric synthetic methods and mechanistic explanations of reactivity. Applications of α-aminoboronates as versatile synthetic building blocks are also discussed.
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Affiliation(s)
- Wenbo Ming
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
| | - Harjeet S Soor
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada.
| | - Xiaocui Liu
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
| | - Alina Trofimova
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada.
| | - Andrei K Yudin
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada.
| | - Todd B Marder
- Institute of Inorganic Chemistry and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany.
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3
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Gant Kanegusuku AL, Roizen JL. Recent Advances in Photoredox-Mediated Radical Conjugate Addition Reactions: An Expanding Toolkit for the Giese Reaction. Angew Chem Int Ed Engl 2021; 60:21116-21149. [PMID: 33629454 PMCID: PMC8382814 DOI: 10.1002/anie.202016666] [Citation(s) in RCA: 97] [Impact Index Per Article: 32.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Indexed: 12/18/2022]
Abstract
Photomediated Giese reactions are at the forefront of radical chemistry, much like the classical tin-mediated Giese reactions were nearly forty years ago. With the global recognition of organometallic photocatalysts for the mild and tunable generation of carbon-centered radicals, chemists have developed a torrent of strategies to form previously inaccessible radical intermediates that are capable of engaging in intermolecular conjugate addition reactions. This Review summarizes advances in photoredox-mediated Giese reactions since 2013, with a focus on the breadth of methods that provide access to crucial carbon-centered radical intermediates that can engage in radical conjugate addition processes.
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Affiliation(s)
| | - Jennifer L Roizen
- Department of Chemistry, Duke University, Box 90346, Durham, NC, 27708-0354, USA
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4
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Gant Kanegusuku AL, Roizen JL. Recent Advances in Photoredox‐Mediated Radical Conjugate Addition Reactions: An Expanding Toolkit for the Giese Reaction. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016666] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Jennifer L. Roizen
- Department of Chemistry Duke University Box 90346 Durham NC 27708-0354 USA
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5
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Palladium-mediated Suzuki-Miyaura Cross-Coupling Reaction of Potassium Boc-protected aminomethyltrifluoroborate with DNA-Conjugated aryl bromides for DNA-Encoded chemical library synthesis. Biochem Biophys Res Commun 2020; 533:209-214. [DOI: 10.1016/j.bbrc.2020.04.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 03/05/2020] [Accepted: 04/06/2020] [Indexed: 12/12/2022]
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6
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Zhou T, Szostak M. Palladium-Catalyzed Cross-Couplings by C-O Bond Activation. Catal Sci Technol 2020; 10:5702-5739. [PMID: 33796263 PMCID: PMC8009314 DOI: 10.1039/d0cy01159b] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Although palladium-catalyzed cross-coupling of aryl halides and reactive pseudohalides has revolutionized the way organic molecules are constructed today across various fields of chemistry, comparatively less progress has been made in the palladium-catalyzed cross-coupling of less reactive C-O electrophiles. This is despite the fact that the use of phenols and phenol derivatives as bench-stable cross-coupling partners has been well-recognized to bring about major advantages over aryl halides, such as (1) natural abundance of phenols, (2) avoidance of toxic halides, (3) orthogonal cross-coupling conditions, (4) prefunctionalization of phenolic substrates by electrophilic substitution or C-H functionalization, (5) ready availability of phenols from a different pool of precursors than aryl halides. In this review, we present an overview of recent advances made in the field of palladium-catalyzed cross-coupling of C-O electrophiles with a focus on (1) catalytic systems, (2) reaction type, and (3) class of C-O coupling partners. Although the field has been historically dominated by nickel catalysis, it is now evident that the use of more versatile, more functional group tolerant and highly active palladium catalysts supported by appropriately designed ancillary ligands enables the cross-coupling with improved substrate scope and generality, and likely represents a practical solution to the broadly applicable cross-coupling of various C-O bonds across diverse chemical disciplines. The review covers the period through June 2020.
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Affiliation(s)
- Tongliang Zhou
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, NJ 07102, United States
| | - Michal Szostak
- Department of Chemistry, Rutgers University, 73 Warren Street, Newark, NJ 07102, United States
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7
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Dharani S, Kalaiarasi G, Sindhuja D, Lynch VM, Shankar R, Karvembu R, Prabhakaran R. Tetranuclear Palladacycles of 3-Acetyl-7-methoxy-2H-chromen-2-one Derived Schiff Bases: Efficient Catalysts for Suzuki–Miyaura Coupling in an Aqueous Medium. Inorg Chem 2019; 58:8045-8055. [DOI: 10.1021/acs.inorgchem.9b00794] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Sivadasan Dharani
- Department of Chemistry, Bharathiar University, Coimbatore 641 046, India
| | - Giriraj Kalaiarasi
- Department of Chemistry, Bharathiar University, Coimbatore 641 046, India
| | - Dharmalingam Sindhuja
- Department of Chemistry, National Institute of Technology, Tiruchirappalli 620015, India
| | - Vincent M. Lynch
- Department of Chemistry, University of Texas, Austin, Texas 78712-1224, United States
| | - Ramasamy Shankar
- Department of Physics, Bharathiar University, Coimbatore 641 046, India
| | - Ramasamy Karvembu
- Department of Chemistry, National Institute of Technology, Tiruchirappalli 620015, India
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8
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Liu C, Liu Y, Liu R, Lalancette R, Szostak R, Szostak M. Palladium-Catalyzed Suzuki-Miyaura Cross-Coupling of N-Mesylamides by N-C Cleavage: Electronic Effect of the Mesyl Group. Org Lett 2017; 19:1434-1437. [PMID: 28263605 DOI: 10.1021/acs.orglett.7b00373] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A general Pd-catalyzed Suzuki-Miyaura cross-coupling of N-mesylamides with arylboronic acids by selective N-C cleavage has been developed. The presented results represent the first example of a transition-metal-catalyzed cross-coupling of amides activated by an atom-economic, cheap, and benign mesyl group. The reaction delivers arylated products featuring a range of useful functional groups by chemoselective cleavage of the amide N-C bond with high efficiency. Both the scope and the origin of high selectivity are discussed. A beneficial effect of the N-mesyl substituent on the bond activation in acyclic amides is presented.
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Affiliation(s)
- Chengwei Liu
- Department of Chemistry, Rutgers University , 73 Warren Street, Newark, New Jersey 07102, United States
| | - Yongmei Liu
- Department of Chemistry, Rutgers University , 73 Warren Street, Newark, New Jersey 07102, United States.,College of Chemistry and Chemical Engineering, Yangzhou University , 180 Siwangting Road, Yangzhou 225002, China
| | - Ruzhang Liu
- College of Chemistry and Chemical Engineering, Yangzhou University , 180 Siwangting Road, Yangzhou 225002, China
| | - Roger Lalancette
- Department of Chemistry, Rutgers University , 73 Warren Street, Newark, New Jersey 07102, United States
| | - Roman Szostak
- Department of Chemistry, Wroclaw University , F. Joliot-Curie 14, Wroclaw 50-383, Poland
| | - Michal Szostak
- Department of Chemistry, Rutgers University , 73 Warren Street, Newark, New Jersey 07102, United States
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9
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Dumas AM, Sieradzki AJ, Donnelly LJ. Exploiting the Bis-Nucleophilicity of α-Aminoboronates: Copper-Catalyzed, Intramolecular Aminoalkylations of Bromobenzoyl Chlorides. Org Lett 2016; 18:1848-51. [PMID: 27017848 DOI: 10.1021/acs.orglett.6b00586] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
α-Aminoboronate salts are interesting examples of heteroatomic species containing adjacent nucleophilic centers. We have developed an acylation/arylation reaction using 2-bromobenzoyl chlorides as bis-electrophiles that harnesses the nucleophilicity of both positions, leading to isoindolinones. The reactions proceed under mild conditions via an intramolecular, Cu-catalyzed sp(3)-sp(2) coupling, giving products in up to 95% yield. These conditions enable arylation of α,α-disubstituted aminoboronates, which are difficult to accomplish using methods based on less abundant and more expensive transition metals.
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Affiliation(s)
- Aaron M Dumas
- Department of Process Chemistry, Merck Sharp and Dohme Ltd. , Hertford Road, Hoddesdon EN11 9BU, United Kingdom
| | - Adrian J Sieradzki
- Department of Process Chemistry, Merck Sharp and Dohme Ltd. , Hertford Road, Hoddesdon EN11 9BU, United Kingdom
| | - Liam J Donnelly
- Department of Process Chemistry, Merck Sharp and Dohme Ltd. , Hertford Road, Hoddesdon EN11 9BU, United Kingdom
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10
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Zhang X, Sun X, Fan H, Lyu C, Li P, Zhang H, Rao W. Gold-catalyzed formation of indole derivatives from 2-alkynyl arylazides and oxygen-containing heterocycles. RSC Adv 2016. [DOI: 10.1039/c6ra09761h] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Gold-catalyzed ring-opening reactions of oxygen-containing heterocycles.
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Affiliation(s)
- Xiaoxiang Zhang
- Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Xiaoping Sun
- Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Hui Fan
- School of Petrochemical Engineering
- Changzhou University
- Changzhou 213164
- China
| | - Chang Lyu
- Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Ping Li
- Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Haifei Zhang
- Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Weidong Rao
- Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
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11
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El Khatib M, Serafim RAM, Molander GA. α-Arylation/Heteroarylation of Chiral α-Aminomethyltrifluoroborates by Synergistic Iridium Photoredox/Nickel Cross-Coupling Catalysis. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201506147] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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El Khatib M, Serafim RAM, Molander GA. α-Arylation/Heteroarylation of Chiral α-Aminomethyltrifluoroborates by Synergistic Iridium Photoredox/Nickel Cross-Coupling Catalysis. Angew Chem Int Ed Engl 2015; 55:254-8. [PMID: 26592731 DOI: 10.1002/anie.201506147] [Citation(s) in RCA: 121] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2015] [Indexed: 11/09/2022]
Abstract
Direct access to complex, enantiopure benzylamine architectures using a synergistic iridium photoredox/nickel cross-coupling dual catalysis strategy has been developed. New C(sp(3))-C(sp(2)) bonds are forged starting from abundant and inexpensive natural amino acids.
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Affiliation(s)
- Mirna El Khatib
- Department of Chemistry, University of Pennsylvania, Roy and Diana Vagelos Laboratories, 231 S. 34th St., Philadelphia, PA 19104-6323 (USA)
| | - Ricardo Augusto Massarico Serafim
- Department of Chemistry, University of Pennsylvania, Roy and Diana Vagelos Laboratories, 231 S. 34th St., Philadelphia, PA 19104-6323 (USA).,Department of Pharmacy, Faculty of Pharmaceutical Sciences, University of São Paulo-FCF/USP (Brazil)
| | - Gary A Molander
- Department of Chemistry, University of Pennsylvania, Roy and Diana Vagelos Laboratories, 231 S. 34th St., Philadelphia, PA 19104-6323 (USA).
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13
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Fu WC, So CM, Kwong FY. Palladium-Catalyzed Phosphorylation of Aryl Mesylates and Tosylates. Org Lett 2015; 17:5906-9. [DOI: 10.1021/acs.orglett.5b03104] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wai Chung Fu
- State Key Laboratory of Chirosciences
and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Chau Ming So
- State Key Laboratory of Chirosciences
and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Fuk Yee Kwong
- State Key Laboratory of Chirosciences
and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
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14
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Yuan M, Fang Y, Zhang L, Jin X, Tao M, Ye Q, Li R, Li J, Zheng H, Gu J. Pd-Catalyzed Synthesis ofα-Aryl Vinylphosphonates via Suzuki Arylation ofα-Phosphonovinyl Nonaflates. CHINESE J CHEM 2015. [DOI: 10.1002/cjoc.201500414] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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15
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Maluenda I, Navarro O. Recent developments in the Suzuki-Miyaura reaction: 2010-2014. Molecules 2015; 20:7528-57. [PMID: 25919276 PMCID: PMC6272665 DOI: 10.3390/molecules20057528] [Citation(s) in RCA: 249] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Revised: 04/10/2015] [Accepted: 04/13/2015] [Indexed: 12/21/2022] Open
Abstract
The Suzuki-Miyaura reaction (SMR), involving the coupling of an organoboron reagent and an organic halide or pseudo-halide in the presence of a palladium or nickel catalyst and a base, has arguably become one of most utilized tools for the construction of a C-C bond. This review intends to be general account of all types of catalytic systems, new coupling partners and applications, including the literature between September 2010 and December 2014.
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Affiliation(s)
- Irene Maluenda
- Department of Chemistry, University of Sussex, Brighton BN1 9QJ, UK
| | - Oscar Navarro
- Department of Chemistry, University of Sussex, Brighton BN1 9QJ, UK.
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16
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Miyazawa K, Koike T, Akita M. Hydroaminomethylation of Olefins with Aminomethyltrifluoroborate by Photoredox Catalysis. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400556] [Citation(s) in RCA: 94] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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17
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Nadaf RN, Seapy DG. Palladium-Catalyzed Cross-Coupling Reactions of Potassium N-Methyltrifluoroborate Isoindolin-1-one with Aryl and Heteroaryl Chlorides. SYNTHETIC COMMUN 2014. [DOI: 10.1080/00397911.2014.884591] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Rashid N. Nadaf
- a Department of Chemistry , Texas A&M University at Qatar , Doha , Qatar
| | - Dave G. Seapy
- a Department of Chemistry , Texas A&M University at Qatar , Doha , Qatar
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18
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Li Q, Liskey CW, Hartwig JF. Regioselective borylation of the C-H bonds in alkylamines and alkyl ethers. Observation and origin of high reactivity of primary C-H bonds beta to nitrogen and oxygen. J Am Chem Soc 2014; 136:8755-65. [PMID: 24836159 DOI: 10.1021/ja503676d] [Citation(s) in RCA: 111] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Borylation of aliphatic C-H bonds in alkylamines and alkyl ethers to form primary aminoalkyl and alkoxyalkyl boronate esters and studies on the origin of the regioselectivity of these reactions are reported. The products of these reactions can be used directly in Suzuki-Miyaura cross-coupling reactions or isolated as air-stable potassium trifluoroborate salts. Selective borylation of the terminal C-H bond at the positions β to oxygen and nitrogen occurs in preference to borylation of the other terminal C-H bonds. Experimental studies and computational results show that C-H bond cleavage is the rate-determining step of the current borylation reactions. The observed higher reactivity of C-H bonds at the terminal position of ethylamines and ethers results from a combination of attractive Lewis acid-base and hydrogen-bonding interactions, as well as typical repulsive steric interactions, in the transition state. In this transition state, the heteroatom lies directly above the boron atom of one boryl ligand, creating a stabilizing interaction between the weak Lewis acid and Lewis base, and a series of C-H bonds of the substrate lie near the oxygen atoms of the boryl ligands, participating in a set of weak C-H···O interactions that lead to significant stabilization of the transition state forming the major product.
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Affiliation(s)
- Qian Li
- Department of Chemistry, University of California , Berkeley, California 94720, United States
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19
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Spyropoulos C, Kokotos CG. One-Pot Synthesis of Ureas from Boc-Protected Amines. J Org Chem 2014; 79:4477-83. [DOI: 10.1021/jo500492x] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Constantinos Spyropoulos
- Laboratory of Organic Chemistry,
Department of Chemistry, University of Athens, Panepistimiopolis 15771, Athens, Greece
| | - Christoforos G. Kokotos
- Laboratory of Organic Chemistry,
Department of Chemistry, University of Athens, Panepistimiopolis 15771, Athens, Greece
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20
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Alsabeh PG, Stradiotto M. Addressing Challenges in Palladium-Catalyzed Cross-Couplings of Aryl Mesylates: Monoarylation of Ketones and Primary Alkyl Amines. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201303305] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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21
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Alsabeh PG, Stradiotto M. Addressing Challenges in Palladium-Catalyzed Cross-Couplings of Aryl Mesylates: Monoarylation of Ketones and Primary Alkyl Amines. Angew Chem Int Ed Engl 2013; 52:7242-6. [DOI: 10.1002/anie.201303305] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 05/10/2013] [Indexed: 11/10/2022]
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22
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Chang MY, Wu MH, Chen YL. One-Pot Synthesis of Substituted Tetrahydrocyclobuta[a]naphthalenes by Domino Aldol Condensation/Olefin Migration/Electrocyclization. Org Lett 2013; 15:2822-5. [DOI: 10.1021/ol401152w] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Meng-Yang Chang
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Ming-Hao Wu
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Yeh-Long Chen
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 807, Taiwan
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23
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Cheval NP, Dikova A, Blanc A, Weibel JM, Pale P. Vinyl nosylates: an ideal partner for palladium-catalyzed cross-coupling reactions. Chemistry 2013; 19:8765-8. [PMID: 23695947 DOI: 10.1002/chem.201300127] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Nicolas P Cheval
- Laboratoire de Synthèse, Réactivité Organiques & Catalyse, Institut de Chimie de Strasbourg, associé au CNRS, Université de Strasbourg, 4 rue Blaise Pascal, 67070 Strasbourg, France
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24
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Molander GA, Shin I. Pd-catalyzed Suzuki-Miyaura cross-coupling reactions between sulfamates and potassium Boc-protected aminomethyltrifluoroborates. Org Lett 2013; 15:2534-7. [PMID: 23646846 PMCID: PMC3796167 DOI: 10.1021/ol401021x] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Sulfamates were studied as the electrophilic partners in the palladium-catalyzed Suzuki-Miyaura cross-coupling reaction with potassium Boc-protected primary and secondary aminomethyltrifluoroborates. A broad range of substrates was successfully coupled to provide the desired products. Complex molecules containing a new carbon-carbon bond and an aminomethyl moiety could be prepared through this developed method.
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Affiliation(s)
- Gary A. Molander
- Roy and Diana A. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
| | - Inji Shin
- Roy and Diana A. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323
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Petersen JG, Bergmann R, Møller HA, Jørgensen CG, Nielsen B, Kehler J, Frydenvang K, Kristensen J, Balle T, Jensen AA, Kristiansen U, Frølund B. Synthesis and biological evaluation of 4-(aminomethyl)-1-hydroxypyrazole analogues of muscimol as γ-aminobutyric acid(a) receptor agonists. J Med Chem 2013; 56:993-1006. [PMID: 23294161 DOI: 10.1021/jm301473k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A series of bioisosteric 4-(aminomethyl)-1-hydroxypyrazole (4-AHP) analogues of muscimol, a GABA(A) receptor agonist, has been synthesized and pharmacologically characterized at native and selected recombinant GABA(A) receptors. The unsubstituted 4-AHP analogue (2a) (EC(50) 19 μM, R(max) 69%) was a moderately potent agonist at human α(1)β(2)γ(2) GABA(A) receptors, and in SAR studies substitutions in the 3- and/or 5-position were found to be detrimental to binding affinities. Ligand-receptor docking in an α(1)β(2)γ(2) GABA(A) receptor homology model along with the obtained SAR indicate that 2a and muscimol share a common binding mode, which deviates from the binding mode of the structurally related antagonist series based on 4-(piperidin-4-yl)-1-hydroxypyrazole (4-PHP, 1). Selectivity for α(1)β(2)γ(2) over ρ(1) GABA(A) receptors was observed for the 5-chloro, 5-bromo, and 5-methyl substituted analogues of 2a illustrating that even small differences in structure can give rise to subtype selectivity.
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Affiliation(s)
- Jette G Petersen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
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26
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Gao P, Leng P, Sun Q, Wang X, Ge Z, Li R. Novel atom-economic reaction: comprehensive utilization of S-alkylisothiouronium salt in the synthesis of thioethers and guanidinium salts. RSC Adv 2013. [DOI: 10.1039/c3ra42503g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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27
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Fleury-Brégeot N, Presset M, Beaumard F, Colombel V, Oehlrich D, Rombouts F, Molander GA. Suzuki-Miyaura cross-coupling of potassium alkoxyethyltrifluoroborates: access to aryl/heteroarylethyloxy motifs. J Org Chem 2012; 77:10399-408. [PMID: 23131122 DOI: 10.1021/jo3021665] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The introduction of an alkoxyethyl moiety onto aromatic substructures has remained a long-standing challenge for synthetic organic chemists. The main reasons are the inherent instability of alkoxyethylmetallic species and the lack of general procedures to access them. A new method utilizing a cross-coupling strategy based on the exceptional properties of organotrifluoroborates has been developed, and the method allows an easy and efficient installation of this unit on a broad range of aryl and heteroaryl bromides.
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Affiliation(s)
- Nicolas Fleury-Brégeot
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA
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28
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Molander GA, Shin I. Potassium Boc-protected secondary aminomethyltrifluoroborates: synthesis and Suzuki-Miyaura cross-coupling reactions. Org Lett 2012; 14:4458-61. [PMID: 22931498 PMCID: PMC3447629 DOI: 10.1021/ol301955s] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Seven potassium Boc-protected secondary aminomethyltrifluoroborates were prepared in a standardized two-step process. The Suzuki-Miyaura cross-coupling reaction was studied with this new class of nucleophiles, and a large variety of aryl and hetaryl chlorides provided the desired products in good to excellent yields, thereby allowing easy access to secondary aminomethyl substructures.
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Affiliation(s)
- Gary A Molander
- Roy and Diana A. Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, USA.
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29
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Sach NW, Richter DT, Cripps S, Tran-Dubé M, Zhu H, Huang B, Cui J, Sutton SC. Synthesis of Aryl Ethers via a Sulfonyl Transfer Reaction. Org Lett 2012; 14:3886-9. [DOI: 10.1021/ol301615z] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Neal W. Sach
- Pfizer Global Research and Development, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Daniel T. Richter
- Pfizer Global Research and Development, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Stephan Cripps
- Pfizer Global Research and Development, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Michelle Tran-Dubé
- Pfizer Global Research and Development, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Huichun Zhu
- Pfizer Global Research and Development, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Buwen Huang
- Pfizer Global Research and Development, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Jean Cui
- Pfizer Global Research and Development, 10770 Science Center Drive, San Diego, California 92121, United States
| | - Scott C. Sutton
- Pfizer Global Research and Development, 10770 Science Center Drive, San Diego, California 92121, United States
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