1
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Cho J, Sadu VS, Han Y, Bae Y, Lee H, Lee KI. Structural Requirements of 1-(2-Pyridinyl)-5-pyrazolones for Disproportionation of Boronic Acids. Molecules 2021; 26:molecules26226814. [PMID: 34833904 PMCID: PMC8623043 DOI: 10.3390/molecules26226814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/02/2021] [Accepted: 11/06/2021] [Indexed: 11/16/2022] Open
Abstract
We observed an unusual formation of four-coordinate boron(III) complexes from the reaction of 1-(2-pyridinyl)-5-pyrazolone derivatives with arylboronic acids in the basic media. The exact mechanism is not clear; however, the use of unprotected boronic acid and the presence of a bidentate ligand appeared to be the key structural requirements for the transformation. The results suggest that base-promoted disproportionation of arylboronic acid with the assistance of the [N,O]-bidentate ligation of 1-(2-pyridinyl)-5-pyrazolone should take place and facilitate the formation of pyrazole diarylborinate. Experiments to obtain a deeper understanding of its mechanism are currently underway.
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Affiliation(s)
- Joungmo Cho
- Korea Research Institute of Chemical Technology, Daejeon 34114, Korea; (J.C.); (Y.H.)
| | - Venkata Subbaiah Sadu
- R&D Center, Molecules & Materials Co., Ltd., B-219 Daeduck BIZ Center, Daejeon 34013, Korea;
| | - Yohan Han
- Korea Research Institute of Chemical Technology, Daejeon 34114, Korea; (J.C.); (Y.H.)
| | - Yunsoo Bae
- Department of Life Science, Ewha Womans University, Seoul 03760, Korea;
| | - Hwajeong Lee
- Graduate School of Pharmaceutical Sciences, Ewha Womans University, Seoul 03760, Korea;
| | - Kee-In Lee
- Korea Research Institute of Chemical Technology, Daejeon 34114, Korea; (J.C.); (Y.H.)
- R&D Center, Molecules & Materials Co., Ltd., B-219 Daeduck BIZ Center, Daejeon 34013, Korea;
- Correspondence:
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2
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Aharon C, Rozen S. Using fluoroform for constructing aromatic and heterocyclic trifluoromethylselenyl compounds. J Fluor Chem 2021. [DOI: 10.1016/j.jfluchem.2021.109866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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3
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Washington JB, Assante M, Yan C, McKinney D, Juba V, Leach AG, Baillie SE, Reid M. Trialkylammonium salt degradation: implications for methylation and cross-coupling. Chem Sci 2021; 12:6949-6963. [PMID: 34123322 PMCID: PMC8153232 DOI: 10.1039/d1sc00757b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Trialkylammonium (most notably N,N,N-trimethylanilinium) salts are known to display dual reactivity through both the aryl group and the N-methyl groups. These salts have thus been widely applied in cross-coupling, aryl etherification, fluorine radiolabelling, phase-transfer catalysis, supramolecular recognition, polymer design, and (more recently) methylation. However, their application as electrophilic methylating reagents remains somewhat underexplored, and an understanding of their arylation versus methylation reactivities is lacking. This study presents a mechanistic degradation analysis of N,N,N-trimethylanilinium salts and highlights the implications for synthetic applications of this important class of salts. Kinetic degradation studies, in both solid and solution phases, have delivered insights into the physical and chemical parameters affecting anilinium salt stability. 1H NMR kinetic analysis of salt degradation has evidenced thermal degradation to methyl iodide and the parent aniline, consistent with a closed-shell SN2-centred degradative pathway, and methyl iodide being the key reactive species in applied methylation procedures. Furthermore, the effect of halide and non-nucleophilic counterions on salt degradation has been investigated, along with deuterium isotope and solvent effects. New mechanistic insights have enabled the investigation of the use of trimethylanilinium salts in O-methylation and in improved cross-coupling strategies. Finally, detailed computational studies have helped highlight limitations in the current state-of-the-art of solvation modelling of reaction in which the bulk medium undergoes experimentally observable changes over the reaction timecourse. The dual reactivity of N,N,N-trimethylanilinium salts towards arylation and methylation is decoupled in this mechanistic investigation to enable more strategic application of these salts in either reaction class.![]()
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Affiliation(s)
- Jack B Washington
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building 295 Cathedral Street Glasgow UK
| | - Michele Assante
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University Byrom Street Liverpool UK
| | - Chunhui Yan
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building 295 Cathedral Street Glasgow UK
| | - David McKinney
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building 295 Cathedral Street Glasgow UK
| | - Vanessa Juba
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building 295 Cathedral Street Glasgow UK
| | - Andrew G Leach
- Division of Pharmacy and Optometry, University of Manchester Stopford Building Oxford Road Manchester UK
| | | | - Marc Reid
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde, Thomas Graham Building 295 Cathedral Street Glasgow UK
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4
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Li N, Xiong F, Gao K. Cobalt-Catalyzed Protodeboronation of Aryl and Vinyl Boronates. J Org Chem 2021; 86:1972-1979. [PMID: 33399463 DOI: 10.1021/acs.joc.0c02570] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
An efficient cobalt-based catalytic system for protodeboronation of various aryl and vinyl boronates is described. The reaction is capable of tolerating a wide range of functional groups. The reaction is also extended to deuterodeboronation with D2O, which provides a potential protocol for the synthesis of regiospecifically deuterated arenes and olefins.
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Affiliation(s)
- Ninglin Li
- Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, P. R. China
| | - Fuqiang Xiong
- Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, P. R. China
| | - Ke Gao
- Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, P. R. China
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5
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Kelly AM, Chen PJ, Klubnick J, Blair DJ, Burke MD. A Mild Method for Making MIDA Boronates. Org Lett 2020; 22:9408-9414. [DOI: 10.1021/acs.orglett.0c02449] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aidan M. Kelly
- Roger Adams Laboratory, School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 S, Mathews Avenue, Urbana, Illinois 61801, United States
| | - Peng-Jui Chen
- Roger Adams Laboratory, School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 S, Mathews Avenue, Urbana, Illinois 61801, United States
| | - Jenna Klubnick
- Roger Adams Laboratory, School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 S, Mathews Avenue, Urbana, Illinois 61801, United States
| | - Daniel J. Blair
- Roger Adams Laboratory, School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 S, Mathews Avenue, Urbana, Illinois 61801, United States
| | - Martin D. Burke
- Roger Adams Laboratory, School of Chemical Sciences, University of Illinois at Urbana−Champaign, 600 S, Mathews Avenue, Urbana, Illinois 61801, United States
- Carle Illinois College of Medicine, 807 South Wright Street, Urbana, Illinois 61820, United States
- Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana−Champaign, 1206 West Gregory Dr., Urbana, Illinois 61801, United States
- Arnold and Mabel Beckman Institute, University of Illinois at Urbana−Champaign, 405 North Mathews Ave., Urbana, Illinois 61801, United States
- Department of Biochemistry, University of Illinois at Urbana−Champaign, 600 S Mathews Avenue, Urbana, Illinois 61801, United States
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6
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Yang Y, Luo G, Li Y, Tong X, He M, Zeng H, Jiang Y, Liu Y, Zheng Y. Nickel-Catalyzed Reductive Coupling for Transforming Unactivated Aryl Electrophiles into β-Fluoroethylarenes. Chem Asian J 2020; 15:156-162. [PMID: 31755237 DOI: 10.1002/asia.201901490] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Revised: 11/21/2019] [Indexed: 01/24/2023]
Abstract
We report herein a facile synthetic method for converting unactivated (hetero)aryl electrophiles into β-fluoroethylated (hetero)arenes via nickel-catalyzed reductive cross-couplings. This coupling reaction features the involvement of FCH2 CH2 radical intermediate rather than β-fluoroethyl manganese species which provides effective solutions to the problematic β-fluoride side eliminations. The practical value of this protocol is further demonstrated by the late-stage modification of several complex ArCl or ArOH-derived bioactive molecules.
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Affiliation(s)
- Yi Yang
- College of Chemistry and Environmental Engineering, Sichuan University of Science&Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China
| | - Gen Luo
- College of Chemistry and Environmental Engineering, Sichuan University of Science&Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China
| | - Youlin Li
- College of Chemistry and Environmental Engineering, Sichuan University of Science&Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China
| | - Xia Tong
- College of Chemistry and Environmental Engineering, Sichuan University of Science&Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China
| | - Mengmeng He
- College of Chemistry and Environmental Engineering, Sichuan University of Science&Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China
| | - Hongyao Zeng
- College of Chemistry, Leshan Normal University, 778 Binghe Road, Leshan, Sichuan, 614000, China
| | - Yan Jiang
- College of Chemistry and Environmental Engineering, Sichuan University of Science&Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China
| | - Yingle Liu
- College of Chemistry and Environmental Engineering, Sichuan University of Science&Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China
| | - Yubin Zheng
- College of Chemistry and Environmental Engineering, Sichuan University of Science&Engineering, 180 Xueyuan Street, Huixing Lu, Zigong, Sichuan, 643000, China
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7
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Nieto-Sepulveda E, Bage AD, Evans LA, Hunt TA, Leach AG, Thomas SP, Lloyd-Jones GC. Kinetics and Mechanism of the Arase-Hoshi R2BH-Catalyzed Alkyne Hydroboration: Alkenylboronate Generation via B–H/C–B Metathesis. J Am Chem Soc 2019; 141:18600-18611. [DOI: 10.1021/jacs.9b10114] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Eduardo Nieto-Sepulveda
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Andrew D. Bage
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Louise A. Evans
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Thomas A. Hunt
- Medicinal Chemistry, Oncology R&D, AstraZeneca, Cambridge, CB4 0WG, United Kingdom
| | - Andrew G. Leach
- School of Health Sciences, Stopford Building, The University of Manchester, Oxford Road, Manchester M13 9PT, United Kingdom
| | - Stephen P. Thomas
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
| | - Guy C. Lloyd-Jones
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh, EH9 3FJ, United Kingdom
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8
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Yang Y, Cai J, Luo G, Tong X, Su Y, Jiang Y, Liu Y, Zheng Y, Zeng J, Li C. Selective activation of 1,2-dichloroethane for access to β-chloroethylarenes enabled by nickel-catalyzed suzuki-type couplings. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.03.040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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9
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Yang Y, Cai J, Luo G, Jiang Y, Su Y, Su Y, Li C, Zheng Y, Zeng J, Liu Y. Nickel-catalyzed fluoroethylation of arylboronic acids via Suzuki-type coupling. Org Chem Front 2019. [DOI: 10.1039/c9qo00066f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A new and step-economic method for the synthesis of homobenzylic fluorides through nickel-catalyzed Suzuki-type fluoroethylation coupling is developed.
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Affiliation(s)
- Yi Yang
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
| | - Junjie Cai
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
| | - Gen Luo
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
| | - Yan Jiang
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
| | - Yumei Su
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
| | - Yang Su
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
| | - Chaolin Li
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
| | - Yubin Zheng
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
| | - Jijiao Zeng
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
| | - Yingle Liu
- Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan
- Sichuan University of Science & Engineering
- Zigong
- China
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10
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Adamczyk-Woźniak A, Kaczorowska E, Kredátusova J, Madura I, Marek PH, Matuszewska A, Sporzyński A, Uchman M. Dehydration ofortho-,meta- andpara-Alkoxy Phenylboronic Acids to their Corresponding Boroxines. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701485] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Agnieszka Adamczyk-Woźniak
- Department of Physical Chemistry; Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
| | - Ewa Kaczorowska
- Department of Physical Chemistry; Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
| | - Jana Kredátusova
- Institute of Macromolecular Chemistry AS CR; Heyrovsky Sq. 2 162 06 Prague 6 Czech Republic
| | - Izabela Madura
- Department of Physical Chemistry; Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
| | - Paulina H. Marek
- Department of Physical Chemistry; Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
| | - Alicja Matuszewska
- Department of Physical Chemistry; Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
- Department of Physical and Macromolecular Chemistry; Faculty of Science; Charles University; Hlavova 2030 128 40 Prague 2 Czech Republic
| | - Andrzej Sporzyński
- Department of Physical Chemistry; Faculty of Chemistry; Warsaw University of Technology; Noakowskiego 3 00-664 Warsaw Poland
| | - Mariusz Uchman
- Department of Physical and Macromolecular Chemistry; Faculty of Science; Charles University; Hlavova 2030 128 40 Prague 2 Czech Republic
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11
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Rego Campello H, Gallagher T. C(5) Site-Selective Functionalization of (S)-Cotinine. J Org Chem 2018; 83:516-520. [PMID: 29207240 DOI: 10.1021/acs.joc.7b02704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
(S)-(-)-Cotinine 2 undergoes direct and site-selective iridium-catalyzed borylation to provide boronate ester 3 and bromide 4 which offer flexible entry to a range of C(5)-substituted cotinine variants.
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Affiliation(s)
- Hugo Rego Campello
- School of Chemistry, University of Bristol , Bristol BS8 1TS, United Kingdom
| | - Timothy Gallagher
- School of Chemistry, University of Bristol , Bristol BS8 1TS, United Kingdom
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12
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Cox PA, Reid M, Leach AG, Campbell AD, King EJ, Lloyd-Jones GC. Base-Catalyzed Aryl-B(OH) 2 Protodeboronation Revisited: From Concerted Proton Transfer to Liberation of a Transient Aryl Anion. J Am Chem Soc 2017; 139:13156-13165. [PMID: 28823150 DOI: 10.1021/jacs.7b07444] [Citation(s) in RCA: 181] [Impact Index Per Article: 25.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Pioneering studies by Kuivila, published more than 50 years ago, suggested ipso protonation of the boronate as the mechanism for base-catalyzed protodeboronation of arylboronic acids. However, the study was limited to UV spectrophotometric analysis under acidic conditions, and the aqueous association constants (Ka) were estimated. By means of NMR, stopped-flow IR, and quenched-flow techniques, the kinetics of base-catalyzed protodeboronation of 30 different arylboronic acids has now been determined at pH > 13 in aqueous dioxane at 70 °C. Included in the study are all 20 isomers of C6HnF(5-n)B(OH)2 with half-lives spanning 9 orders of magnitude: <3 ms to 6.5 months. In combination with pH-rate profiles, pKa and ΔS⧧ values, kinetic isotope effects (2H, 10B, 13C), linear free-energy relationships, and density functional theory calculations, we have identified a mechanistic regime involving unimolecular heterolysis of the boronate competing with concerted ipso protonation/C-B cleavage. The relative Lewis acidities of arylboronic acids do not correlate with their protodeboronation rates, especially when ortho substituents are present. Notably, 3,5-dinitrophenylboronic acid is orders of magnitude more stable than tetra- and pentafluorophenylboronic acids but has a similar pKa.
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Affiliation(s)
- Paul A Cox
- School of Chemistry, University of Edinburgh , Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Marc Reid
- School of Chemistry, University of Edinburgh , Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Andrew G Leach
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University , Byrom Street, Liverpool L3 3AF, U.K
| | | | - Edward J King
- TgK Scientific Limited , 7 Long's Yard, St Margaret's Street, Bradford-on-Avon BA15 1DH, U.K
| | - Guy C Lloyd-Jones
- School of Chemistry, University of Edinburgh , Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K
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13
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Molloy JJ, Clohessy TA, Irving C, Anderson NA, Lloyd-Jones GC, Watson AJB. Chemoselective oxidation of aryl organoboron systems enabled by boronic acid-selective phase transfer. Chem Sci 2017; 8:1551-1559. [PMID: 28572912 PMCID: PMC5452267 DOI: 10.1039/c6sc04014d] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Accepted: 10/25/2016] [Indexed: 01/24/2023] Open
Abstract
We report the direct chemoselective Brown-type oxidation of aryl organoboron systems containing two oxidizable boron groups. Basic biphasic reaction conditions enable selective formation and phase transfer of a boronic acid trihydroxyboronate in the presence of boronic acid pinacol (BPin) esters, while avoiding speciation equilibria. Spectroscopic investigations validate a base-promoted phase-selective discrimination of organoboron species. This phenomenon is general across a broad range of organoboron compounds and can also be used to invert conventional protecting group strategies, enabling chemoselective oxidation of BMIDA species over normally more reactive BPin substrates. We also demonstrate the selective oxidation of diboronic acid systems with chemoselectivity predictable a priori. The utility of this method is exemplified through the development of a chemoselective oxidative nucleophile coupling.
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Affiliation(s)
- John J Molloy
- Department of Pure and Applied Chemistry , WestCHEM , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , UK .
| | - Thomas A Clohessy
- Department of Pure and Applied Chemistry , WestCHEM , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , UK .
- GlaxoSmithKline , Medicines Research Centre , Gunnels Wood Road , Stevenage , SG1 2NY , UK
| | - Craig Irving
- Department of Pure and Applied Chemistry , WestCHEM , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , UK .
| | - Niall A Anderson
- GlaxoSmithKline , Medicines Research Centre , Gunnels Wood Road , Stevenage , SG1 2NY , UK
| | - Guy C Lloyd-Jones
- School of Chemistry , University of Edinburgh West Mains Road , Edinburgh , EH9 3JJ , UK
| | - Allan J B Watson
- Department of Pure and Applied Chemistry , WestCHEM , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , UK .
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14
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Wang Q, Tang XY, Shi M. Metal-Free Cross-Coupling of Arylboronic Acids and Derivatives with DAST-Type Reagents for Direct Access to Diverse Aromatic Sulfinamides and Sulfonamides. Angew Chem Int Ed Engl 2016; 55:10811-5. [DOI: 10.1002/anie.201605066] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 06/21/2016] [Indexed: 12/16/2022]
Affiliation(s)
- Qiang Wang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 China
| | - Xiang-Ying Tang
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
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15
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Wang Q, Tang XY, Shi M. Metal-Free Cross-Coupling of Arylboronic Acids and Derivatives with DAST-Type Reagents for Direct Access to Diverse Aromatic Sulfinamides and Sulfonamides. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605066] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Qiang Wang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 China
| | - Xiang-Ying Tang
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Min Shi
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals; East China University of Science and Technology; Meilong Road No. 130 Shanghai 200237 China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
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16
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El Dine TM, Rouden J, Blanchet J. Borinic acid catalysed peptide synthesis. Chem Commun (Camb) 2016; 51:16084-7. [PMID: 26390250 DOI: 10.1039/c5cc06177f] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The catalytic synthesis of peptides is a major challenge in the modern organic chemistry hindered by the well-established use of stoichiometric coupling reagents. Herein, we describe for the first time that borinic acid is able to catalyse this reaction under mild conditions with an improved activity compared to our recently developed thiophene-based boronic acid. This catalyst is particularly efficient for peptide bond synthesis affording dipeptides in good yields without detectable racemization.
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Affiliation(s)
- Tharwat Mohy El Dine
- Laboratoire de Chimie Moléculaire et Thio-organique, ENSICAEN, Université de Caen Normandie, CNRS, 6 boulevard du Maréchal Juin, 14050 Caen, France.
| | - Jacques Rouden
- Laboratoire de Chimie Moléculaire et Thio-organique, ENSICAEN, Université de Caen Normandie, CNRS, 6 boulevard du Maréchal Juin, 14050 Caen, France.
| | - Jérôme Blanchet
- Laboratoire de Chimie Moléculaire et Thio-organique, ENSICAEN, Université de Caen Normandie, CNRS, 6 boulevard du Maréchal Juin, 14050 Caen, France.
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17
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Cox PA, Leach AG, Campbell AD, Lloyd-Jones GC. Protodeboronation of Heteroaromatic, Vinyl, and Cyclopropyl Boronic Acids: pH–Rate Profiles, Autocatalysis, and Disproportionation. J Am Chem Soc 2016; 138:9145-57. [DOI: 10.1021/jacs.6b03283] [Citation(s) in RCA: 218] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Paul A. Cox
- School
of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster
Road, Edinburgh EH9 3FJ, United Kingdom
| | - Andrew G. Leach
- School
of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, United Kingdom
| | - Andrew D. Campbell
- Pharmaceutical
Technology and Development, AstraZeneca, Silk Road Business Park, Macclesfield SK10 2NA, United Kingdom
| | - Guy C. Lloyd-Jones
- School
of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster
Road, Edinburgh EH9 3FJ, United Kingdom
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18
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Vantourout JC, Law RP, Isidro-Llobet A, Atkinson SJ, Watson AJB. Chan–Evans–Lam Amination of Boronic Acid Pinacol (BPin) Esters: Overcoming the Aryl Amine Problem. J Org Chem 2016; 81:3942-50. [DOI: 10.1021/acs.joc.6b00466] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Julien C. Vantourout
- Department
of Pure and Applied Chemistry, WestCHEM, University of Strathclyde, Glasgow, G1 1XL, U.K
| | - Robert P. Law
- GlaxoSmithKline, Medicines Research Centre, Gunnels Wood Road, Stevenage, SG1 2NY, U.K
| | - Albert Isidro-Llobet
- GlaxoSmithKline, Medicines Research Centre, Gunnels Wood Road, Stevenage, SG1 2NY, U.K
| | - Stephen J. Atkinson
- GlaxoSmithKline, Medicines Research Centre, Gunnels Wood Road, Stevenage, SG1 2NY, U.K
| | - Allan J. B. Watson
- Department
of Pure and Applied Chemistry, WestCHEM, University of Strathclyde, Glasgow, G1 1XL, U.K
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19
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Molloy JJ, Watson AJB. B-Protected Boronic Acids: Methodology Development and Strategic Application. BORON REAGENTS IN SYNTHESIS 2016. [DOI: 10.1021/bk-2016-1236.ch012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- John J. Molloy
- Department of Pure and Applied Chemistry, WestCHEM, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow, G1 1XL, United Kingdom
| | - Allan J. B. Watson
- Department of Pure and Applied Chemistry, WestCHEM, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow, G1 1XL, United Kingdom
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20
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Barker G, Webster S, Johnson DG, Curley R, Andrews M, Young PC, Macgregor SA, Lee AL. Gold-Catalyzed Proto- and Deuterodeboronation. J Org Chem 2015; 80:9807-16. [PMID: 26118859 DOI: 10.1021/acs.joc.5b01041] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A mild gold-catalyzed protodeboronation reaction, which does not require acid or base additives and can be carried out in "green" solvents, is described. As a result, the reaction is very functional-group-tolerant, even to acid- and base-sensitive functional groups, and should allow for the boronic acid group to be used as an effective traceless directing or blocking group. The reaction has also been extended to deuterodeboronations for regiospecific ipso-deuterations of aryls and heteroaryls from the corresponding organoboronic acid. Based on density functional theory calculations, a mechanism is proposed that involves nucleophilic attack of water at boron followed by rate-limiting B-C bond cleavage and facile protonolysis of a Au-σ-phenyl intermediate.
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Affiliation(s)
- Graeme Barker
- Institute of Chemical Sciences, Heriot-Watt University , Edinburgh, EH14 4AS United Kingdom
| | - Stacey Webster
- Institute of Chemical Sciences, Heriot-Watt University , Edinburgh, EH14 4AS United Kingdom
| | - David G Johnson
- Institute of Chemical Sciences, Heriot-Watt University , Edinburgh, EH14 4AS United Kingdom
| | - Rachel Curley
- Institute of Chemical Sciences, Heriot-Watt University , Edinburgh, EH14 4AS United Kingdom
| | - Matthew Andrews
- Institute of Chemical Sciences, Heriot-Watt University , Edinburgh, EH14 4AS United Kingdom
| | - Paul C Young
- Institute of Chemical Sciences, Heriot-Watt University , Edinburgh, EH14 4AS United Kingdom
| | - Stuart A Macgregor
- Institute of Chemical Sciences, Heriot-Watt University , Edinburgh, EH14 4AS United Kingdom
| | - Ai-Lan Lee
- Institute of Chemical Sciences, Heriot-Watt University , Edinburgh, EH14 4AS United Kingdom
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21
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Fyfe JWB, Valverde E, Seath CP, Kennedy AR, Redmond JM, Anderson NA, Watson AJB. Speciation Control During Suzuki-Miyaura Cross-Coupling of Haloaryl and Haloalkenyl MIDA Boronic Esters. Chemistry 2015; 21:8951-64. [DOI: 10.1002/chem.201500970] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Indexed: 12/20/2022]
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