1
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Jansen-van Vuuren RD, Liu S, Miah MAJ, Cerkovnik J, Košmrlj J, Snieckus V. The Versatile and Strategic O-Carbamate Directed Metalation Group in the Synthesis of Aromatic Molecules: An Update. Chem Rev 2024; 124:7731-7828. [PMID: 38864673 PMCID: PMC11212060 DOI: 10.1021/acs.chemrev.3c00923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 04/26/2024] [Accepted: 05/08/2024] [Indexed: 06/13/2024]
Abstract
The aryl O-carbamate (ArOAm) group is among the strongest of the directed metalation groups (DMGs) in directed ortho metalation (DoM) chemistry, especially in the form Ar-OCONEt2. Since the last comprehensive review of metalation chemistry involving ArOAms (published more than 30 years ago), the field has expanded significantly. For example, it now encompasses new substrates, solvent systems, and metalating agents, while conditions have been developed enabling metalation of ArOAm to be conducted in a green and sustainable manner. The ArOAm group has also proven to be effective in the anionic ortho-Fries (AoF) rearrangement, Directed remote metalation (DreM), iterative DoM sequences, and DoM-halogen dance (HalD) synthetic strategies and has been transformed into a diverse range of functionalities and coupled with various groups through a range of cross-coupling (CC) strategies. Of ultimate value, the ArOAm group has demonstrated utility in the synthesis of a diverse range of bioactive and polycyclic aromatic compounds for various applications.
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Affiliation(s)
- Ross D. Jansen-van Vuuren
- Department
of Chemistry, Queen’s University, Chernoff Hall, 9 Bader Lane, Kingston, Ontario K7K 2N1, Canada
- Faculty
of Chemistry and Chemical Technology, University
of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Susana Liu
- Department
of Chemistry, Queen’s University, Chernoff Hall, 9 Bader Lane, Kingston, Ontario K7K 2N1, Canada
| | - M. A. Jalil Miah
- Department
of Chemistry, Rajshahi University, Rajshahi-6205, Bangladesh
| | - Janez Cerkovnik
- Faculty
of Chemistry and Chemical Technology, University
of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Janez Košmrlj
- Faculty
of Chemistry and Chemical Technology, University
of Ljubljana, Večna pot 113, 1000 Ljubljana, Slovenia
| | - Victor Snieckus
- Department
of Chemistry, Queen’s University, Chernoff Hall, 9 Bader Lane, Kingston, Ontario K7K 2N1, Canada
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2
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Sekiguchi Y, Pang JH, Ng JS, Chen J, Watanabe K, Takita R, Chiba S. Base-Induced Dehydrogenative and Dearomative Transformation of 1-Naphthylmethylamines to 1,4-Dihydronaphthalene-1-carbonitriles. JACS AU 2022; 2:2758-2764. [PMID: 36590271 PMCID: PMC9795570 DOI: 10.1021/jacsau.2c00487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 10/27/2022] [Accepted: 10/27/2022] [Indexed: 06/17/2023]
Abstract
Solvothermal treatment of 1-naphthylmethylamine with potassium hydride (KH) or n-butyllithium (n-BuLi)-potassium t-butoxide (t-BuOK) in THF induces unusual two consecutive β-hydride eliminations to form 1-naphthonitrile and KH. The freshly generated KH is hydridic enough to undergo dearomative hydride addition to the resultant 1-naphthonitrile regioselectively at the C4 position to afford α-cyano benzylic carbanion, which could be functionalized by a series of electrophiles, liberating the corresponding 1,4-dihydronaphthalene-1-carbonitriles having a quaternary carbon center.
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Affiliation(s)
- Yoshiya Sekiguchi
- School
of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
| | - Jia Hao Pang
- School
of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
| | - Jia Sheng Ng
- School
of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
| | - Jiahua Chen
- School
of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
| | - Kohei Watanabe
- Graduate
School of Pharmaceutical Sciences, The University
of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
| | - Ryo Takita
- Graduate
School of Pharmaceutical Sciences, The University
of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-0033, Japan
- School
of Pharmaceutical Sciences, University of
Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Shunsuke Chiba
- School
of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore
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3
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Ma Y, Lui NM, Keresztes I, Woltornist RA, Collum DB. Sodium Isopropyl(trimethylsilyl)amide: A Stable and Highly Soluble Lithium Diisopropylamide Mimic. J Org Chem 2022; 87:14223-14229. [PMID: 36282953 PMCID: PMC10042304 DOI: 10.1021/acs.joc.2c01745] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The preparation, structure, physical properties, and reactivities of sodium isopropyl(trimethylsilyl)amide (NaPTA) are described. The solubilities at room temperature range from n-heptane (0.55 M), n-hexane (0.60 M), toluene (0.65 M), MTBE (1.7 M), Et3N (3.2 M), and THF (>6.0 M). The half-life to destruction in neat THF is >1 year at 25 °C and 7 days at 70 °C, which compares favorably to 2.5 months and 1.5 days, respectively, for LDA in neat THF. This study focuses on NaPTA in THF. 29Si NMR spectroscopy shows exclusively a mixture of cis and trans stereoisomeric dimers in 0.10-12 M THF in hexane. Density functional theory (DFT) computations suggest that the pKb is intermediate between dimeric sodium diisopropylamide (NaDA) and dimeric sodium hexamethyldisilazide (NaHMDS). Metalations of arenes, epoxides, ketones, hydrazones, alkenes, and alkyl halides show higher reactivities than LDA (kNaPTA/LDA = 1-30). While the rates of arene metalation are high, the lower pKb of NaPTA limits the substrates. Metalation of pseudoephedrate-based carboxamides to form disodiated Myers enolates solves several challenging technical problems.
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Affiliation(s)
- Yun Ma
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
| | - Nathan M Lui
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
| | - Ivan Keresztes
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
| | - Ryan A Woltornist
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
| | - David B Collum
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, United States
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4
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Quinodoz P, Kolleth A, Dagoneau D, Yoshimura M, Reyes Méndez L, Joigneaux M, Staiger R, Horber R, Sulzer‐Mossé S, Bekar Cesaretli A, Karadeniz Yezer U, Catak S, De Mesmaeker A. Efficient Synthesis of 9‐Aminophenanthrenes and Heterocyclic Analogues by Electrocyclization of Biaryl Keteniminium Salts. Helv Chim Acta 2022. [DOI: 10.1002/hlca.202200093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Pierre Quinodoz
- Syngenta Crop Protection AG Crop Protection Research Research Chemistry Schaffhauserstrasse 101 CH-4332 Stein Switzerland
| | - Amandine Kolleth
- Syngenta Crop Protection AG Crop Protection Research Research Chemistry Schaffhauserstrasse 101 CH-4332 Stein Switzerland
| | - Dylan Dagoneau
- Syngenta Crop Protection AG Crop Protection Research Research Chemistry Schaffhauserstrasse 101 CH-4332 Stein Switzerland
| | - Masahiko Yoshimura
- Syngenta Crop Protection AG Crop Protection Research Research Chemistry Schaffhauserstrasse 101 CH-4332 Stein Switzerland
| | - Lucía Reyes Méndez
- Syngenta Crop Protection AG Crop Protection Research Research Chemistry Schaffhauserstrasse 101 CH-4332 Stein Switzerland
| | - Mylène Joigneaux
- Syngenta Crop Protection AG Crop Protection Research Research Chemistry Schaffhauserstrasse 101 CH-4332 Stein Switzerland
| | - Roman Staiger
- Syngenta Crop Protection AG Crop Protection Research Research Chemistry Schaffhauserstrasse 101 CH-4332 Stein Switzerland
| | - Robin Horber
- Syngenta Crop Protection AG Crop Protection Research Research Chemistry Schaffhauserstrasse 101 CH-4332 Stein Switzerland
| | - Sarah Sulzer‐Mossé
- Syngenta Crop Protection AG Crop Protection Research Research Chemistry Schaffhauserstrasse 101 CH-4332 Stein Switzerland
| | | | | | - Saron Catak
- Bogazici University Department of Chemistry Bebek, Istanbul TR-34342 Turkey
| | - Alain De Mesmaeker
- Syngenta Crop Protection AG Crop Protection Research Research Chemistry Schaffhauserstrasse 101 CH-4332 Stein Switzerland
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5
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Ochi S, Zhang Z, Xia Y, Dong G. Rhodium-Catalyzed (4+1) Cycloaddition between Benzocyclobutenones and Styrene-Type Alkenes. Angew Chem Int Ed Engl 2022; 61:e202202703. [PMID: 35289979 DOI: 10.1002/anie.202202703] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Indexed: 12/14/2022]
Abstract
Herein, we describe a unique one-carbon ring-expansion strategy to access multi-substituted 2-indanones from benzocyclobutenones and styrene-type olefins. The use of a cationic "ligandless" rhodium catalyst was the key for both high reactivity and selectivity towards the (4+1) product. Broad functional group tolerance, a good substrate scope, and scalability have been demonstrated. Computation studies reveal that the origin of the (4+1) selectivity is due to a facile β-H elimination pathway that reduces the overall barrier of the turnover-limiting C-C reductive elimination step.
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Affiliation(s)
- Shusuke Ochi
- Department of Chemistry, The University of Chicago, 5735 S Ellis Ave, Chicago, IL 60637, USA
| | - Zining Zhang
- Department of Chemistry, The University of Chicago, 5735 S Ellis Ave, Chicago, IL 60637, USA
| | - Ying Xia
- Department of Chemistry, The University of Chicago, 5735 S Ellis Ave, Chicago, IL 60637, USA
| | - Guangbin Dong
- Department of Chemistry, The University of Chicago, 5735 S Ellis Ave, Chicago, IL 60637, USA
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6
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Ochi S, Zhang Z, Xia Y, Dong G. Rhodium‐Catalyzed (4+1) Cycloaddition between Benzocyclobutenones and Styrene‐Type Alkenes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Shusuke Ochi
- Department of Chemistry The University of Chicago 5735 S Ellis Ave Chicago IL 60637 USA
| | - Zining Zhang
- Department of Chemistry The University of Chicago 5735 S Ellis Ave Chicago IL 60637 USA
| | - Ying Xia
- Department of Chemistry The University of Chicago 5735 S Ellis Ave Chicago IL 60637 USA
| | - Guangbin Dong
- Department of Chemistry The University of Chicago 5735 S Ellis Ave Chicago IL 60637 USA
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7
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Seo S, Jeon M, Yun C. Stereoselective Synthesis of Cyclohexane Derivatives: Tandem Lithium Iodide Mediated Intramolecular Conjugate Addition of Thiols to α,β-Bisenones. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1754-7424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractA tandem intramolecular conjugate addition reaction was conducted with α,β-bisenones as selected Michael acceptors which were converted into 1,2,3-trisubstituted six-membered rings in the presence of activated sulfur nucleophiles. The products were obtained in good to excellent yields (maximum yield: 99%). Various substituted α,β-bisenones and sulfur nucleophiles were examined to understand the substrate scope of the reaction. Only one diastereomer was isolated, as lithium iodide mediated enolate trapping reactions improve the stereoselectivity of reactions involving 1,2,3-trisubstituted cyclohexanes.
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Affiliation(s)
- SungYong Seo
- Department of Chemistry, Pukyong National University
- Department of Smart Green Technology Engineering, Pukyong National University
| | - Minseok Jeon
- Department of Chemistry, Pukyong National University
| | - Chaeyoung Yun
- Department of Smart Green Technology Engineering, Pukyong National University
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8
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Abstract
Recent advances in partial reductions of inert carboxylic acids and their derivatives to active aldehydes are reviewed.
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Affiliation(s)
- Zhanhui Yang
- Department of Organic Chemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P. R. China
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9
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Wu Z, Xu X, Wang J, Dong G. Carbonyl 1,2-transposition through triflate-mediated α-amination. Science 2021; 374:734-740. [PMID: 34735246 DOI: 10.1126/science.abl7854] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
[Figure: see text].
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Affiliation(s)
- Zhao Wu
- Department of Chemistry, University of Chicago, Chicago, IL 60637, USA
| | - Xiaolong Xu
- Department of Chemistry, University of Chicago, Chicago, IL 60637, USA
| | - Jianchun Wang
- Department of Chemistry, University of Chicago, Chicago, IL 60637, USA
| | - Guangbin Dong
- Department of Chemistry, University of Chicago, Chicago, IL 60637, USA
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10
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Wang J, Zhang J, Xia Q, Peng Y, Song G. Synthesis of 9-Phenanthrols through a Sequential Ligand-Free Suzuki/Intramolecular Friedel-Crafts Reaction and Their Cytotoxic Activity. Polycycl Aromat Compd 2021. [DOI: 10.1080/10406638.2020.1714674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Jiayi Wang
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, P. R. China
| | - Juan Zhang
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, P. R. China
| | - Qi Xia
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, P. R. China
| | - Yanqing Peng
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, P. R. China
| | - Gonghua Song
- Shanghai Key Laboratory of Chemical Biology, School of Pharmacy, East China University of Science and Technology, Shanghai, P. R. China
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11
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Halogen-sodium exchange enables efficient access to organosodium compounds. Commun Chem 2021; 4:76. [PMID: 36697639 PMCID: PMC9814623 DOI: 10.1038/s42004-021-00513-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2021] [Accepted: 04/22/2021] [Indexed: 02/04/2023] Open
Abstract
With sodium being the most abundant alkali metal on Earth, organosodium compounds are an attractive choice for sustainable chemical synthesis. However, organosodium compounds are rarely used-and are overshadowed by organolithium compounds-because of a lack of convenient and efficient preparation methods. Here we report a halogen-sodium exchange method to prepare a large variety of (hetero)aryl- and alkenylsodium compounds including tri- and tetrasodioarenes, many of them previously inaccessible by other methods. The key discovery is the use of a primary and bulky alkylsodium lacking β-hydrogens, which retards undesired reactions, such as Wurtz-Fittig coupling and β-hydrogen elimination, and enables efficient halogen-sodium exchange. The alkylsodium is readily prepared in situ from neopentyl chloride and an easy-to-handle sodium dispersion. We believe that the efficiency, generality, and convenience of the present method will contribute to the widespread use of organosodium in organic synthesis, ultimately contributing to the development of sustainable organic synthesis by rivalling the currently dominant organolithium reagents.
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12
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Harenberg JH, Weidmann N, Karaghiosoff K, Knochel P. Continuous Flow Sodiation of Substituted Acrylonitriles, Alkenyl Sulfides and Acrylates. Angew Chem Int Ed Engl 2021; 60:731-735. [PMID: 33026681 PMCID: PMC7821005 DOI: 10.1002/anie.202012085] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Indexed: 12/14/2022]
Abstract
The sodiation of substituted acrylonitriles and alkenyl sulfides in a continuous flow set-up using NaDA (sodium diisopropylamide) in EtNMe2 or NaTMP (sodium 2,2,6,6-tetramethylpiperidide)⋅TMEDA in n-hexane provides sodiated acrylonitriles and alkenyl sulfides, which are subsequently trapped in batch with various electrophiles such as aldehydes, ketones, disulfides and allylic bromides affording functionalized acrylonitriles and alkenyl sulfides. This flow-procedure was successfully extended to other acrylates by using Barbier-type conditions.
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Affiliation(s)
- Johannes H. Harenberg
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
| | - Niels Weidmann
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
| | - Konstantin Karaghiosoff
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
| | - Paul Knochel
- Department ChemieLudwig-Maximilians-Universität MünchenButenandtstrasse 5–13, Haus F81377MünchenGermany
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13
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Gui J, Cai X, Chen L, Zhou Y, Zhu W, Jiang Y, Hu M, Chen X, Hu Y, Zhang S. Facile and practical hydrodehalogenations of organic halides enabled by calcium hydride and palladium chloride. Org Chem Front 2021. [DOI: 10.1039/d1qo00758k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
For the first time, calcium hydride and palladium chloride were used to reduce a wide range of organic halides including aromatic bromides, aromatic chlorides, aromatic triflates, aliphatic bromides, aliphatic chlorides and trihalomethyl compounds.
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Affiliation(s)
- Jingjing Gui
- Jiangsu Key Laboratory of Neuropsychiatric Diseases & College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, P.R. China
| | - Xin Cai
- Jiangsu Key Laboratory of Neuropsychiatric Diseases & College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, P.R. China
| | - Lingyun Chen
- Jiangsu Key Laboratory of Neuropsychiatric Diseases & College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, P.R. China
| | - Yuxin Zhou
- Jiangsu Key Laboratory of Neuropsychiatric Diseases & College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, P.R. China
| | - Wenjing Zhu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases & College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, P.R. China
| | - Yuanrui Jiang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases & College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, P.R. China
| | - Min Hu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases & College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, P.R. China
| | - Xiaobei Chen
- State Key Laboratory of Bioreactor Engineering, and Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science & Technology, Shanghai, 200237, P.R. China
| | - Yanwei Hu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases & College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, P.R. China
| | - Shilei Zhang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases & College of Pharmaceutical Sciences, Soochow University, Suzhou, 215123, P.R. China
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14
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Wang D, Qi J, Wang Q. Advances in regioselective functionalization of 9-phenanthrenols. Org Chem Front 2021. [DOI: 10.1039/d1qo00811k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Various approaches are discussed for regioselective functionalization and transformation of 9-phenanthrenol and its ether derivatives, which are readily available from phenanthrene in coal tar.
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Affiliation(s)
- Dongwei Wang
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry (NMAC), Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
| | - Jianhua Qi
- HaoHua Chemials Co., Ltd. Liaoxi Zone, Siping 136400, Jilin Province, P.R. China
| | - Qifeng Wang
- International Joint Research Laboratory of Nano-Micro Architecture Chemistry (NMAC), Department of Organic Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, P. R. China
- HaoHua Chemials Co., Ltd. Liaoxi Zone, Siping 136400, Jilin Province, P.R. China
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15
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An Z, Liu Y, Sun Y, Yan R. TFA-Catalyzed [3+2] Spiroannulation of Cyclobutanols: A Route to Spiro[cyclobuta[a]indene-7,1'-cyclobutane] Skeletons. Chem Asian J 2020; 15:3812-3815. [PMID: 32997399 DOI: 10.1002/asia.202001048] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 09/27/2020] [Indexed: 12/15/2022]
Abstract
A straightforward method for the synthesis of spiro[cyclobuta[a]indene-7,1'-cyclobutane] derivatives from cyclobutanols has been developed via one-pot [3+2] spiroannulation. A series of new spiro[cyclobuta[a]indene-7,1'-cyclobutane] derivatives are facilely synthesized in good yields under mild reaction conditions.
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Affiliation(s)
- Zhenyu An
- State Key Laboratory of Applied Organic Chemistry, Key laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
| | - Yafeng Liu
- Chemical Science and Engineering College, North Minzu University, Yinchuan, 750000, P. R. China
| | - Yanwei Sun
- Research Institute of Exploration & Development, Tuha Oilfield Company, Xinjiang, 830000, P. R. China
| | - Rulong Yan
- State Key Laboratory of Applied Organic Chemistry, Key laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, 730000, P. R. China
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16
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Ong DY, Chen JH, Chiba S. Reductive Functionalization of Carboxamides: A Recent Update. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20200182] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Derek Yiren Ong
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Jia-hua Chen
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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17
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Harenberg JH, Weidmann N, Karaghiosoff K, Knochel P. Natriierung von Substituierten Acrylonitrilen, Alkenylsulfiden und Acrylaten im Kontinuierlichen Durchfluss. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202012085] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Johannes H. Harenberg
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstrasse 5–13, Haus F 81377 München Deutschland
| | - Niels Weidmann
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstrasse 5–13, Haus F 81377 München Deutschland
| | - Konstantin Karaghiosoff
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstrasse 5–13, Haus F 81377 München Deutschland
| | - Paul Knochel
- Department Chemie Ludwig-Maximilians-Universität München Butenandtstrasse 5–13, Haus F 81377 München Deutschland
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18
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Wang B, Li Y, Pang JH, Watanabe K, Takita R, Chiba S. Hydromagnesiation of 1,3‐Enynes by Magnesium Hydride for Synthesis of Tri‐ and Tetra‐substituted Allenes. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202012027] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Bin Wang
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Yihang Li
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Jia Hao Pang
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Kohei Watanabe
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Ryo Takita
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
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19
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Wang B, Li Y, Pang JH, Watanabe K, Takita R, Chiba S. Hydromagnesiation of 1,3‐Enynes by Magnesium Hydride for Synthesis of Tri‐ and Tetra‐substituted Allenes. Angew Chem Int Ed Engl 2020; 60:217-221. [DOI: 10.1002/anie.202012027] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Indexed: 01/04/2023]
Affiliation(s)
- Bin Wang
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Yihang Li
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Jia Hao Pang
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Kohei Watanabe
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Ryo Takita
- Graduate School of Pharmaceutical Sciences The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
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20
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Zhao R, Zeng BL, Jia WQ, Zhao HY, Shen LY, Wang XJ, Pan XD. LiCl-promoted amination of β-methoxy amides (γ-lactones). RSC Adv 2020; 10:34938-34942. [PMID: 35514391 PMCID: PMC9056935 DOI: 10.1039/d0ra07170f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 09/11/2020] [Indexed: 12/21/2022] Open
Abstract
An efficient and mild method has been developed for the amination of β-methoxy amides (γ-lactones) including natural products michelolide, costunolide and parthenolide derivatives by using lithium chloride in good yields. This reaction is applicable to a wide range of substrates with good functional group tolerance. Mechanism studies show that the reactions undergo a LiCl promoted MeOH elimination from the substrates to form the corresponding α,β-unsaturated intermediates followed by the Michael addition of amines. The amination of β-methoxy amides (γ-lactones) including natural products michelolide, costunolide and parthenolide derivatives were first developed by using lithium chloride.![]()
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Affiliation(s)
- Ru Zhao
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences Beijing 100050 China
| | - Bing-Lin Zeng
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences Beijing 100050 China
| | - Wen-Qiang Jia
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences Beijing 100050 China
| | - Hong-Yi Zhao
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences Beijing 100050 China
| | - Long-Ying Shen
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences Beijing 100050 China
| | - Xiao-Jian Wang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences Beijing 100050 China
| | - Xian-Dao Pan
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Peking Union Medical College and Chinese Academy of Medical Sciences Beijing 100050 China .,School of Pharmacy, Anhui University of Chinese Medicine Hefei 230012 China
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21
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Kancherla S, Jørgensen KB. Synthesis of Phenacene-Helicene Hybrids by Directed Remote Metalation. J Org Chem 2020; 85:11140-11153. [PMID: 32786610 PMCID: PMC7498163 DOI: 10.1021/acs.joc.0c01097] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) with six and seven rings were synthesized via directed metalation and cross-coupling of chrysenyl N,N-diethyl carboxamides with o-tolyl and methylnaphthalenyl derivatives. In the presence of competing ortho sites, the site selectivity in iodination of chrysenyl amides by directed ortho metalation (DoM) was influenced by the lithium base. The catalyst ligand bite angle was presumably important in the cross-coupling of sterically hindered bulky PAHs. Subsequent directed remote metalation of biaryls under standard conditions and at elevated temperatures afforded various fused six- and seven-ring PAHs, all in good yields and with fluorescent properties.
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Affiliation(s)
- Sindhu Kancherla
- Department of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger, N-4036 Stavanger, Norway
| | - Kåre B Jørgensen
- Department of Chemistry, Bioscience and Environmental Engineering, Faculty of Science and Technology, University of Stavanger, N-4036 Stavanger, Norway
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22
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García-Domínguez A, West TH, Primozic JJ, Grant KM, Johnston CP, Cumming GG, Leach AG, Lloyd-Jones GC. Difluorocarbene Generation from TMSCF3: Kinetics and Mechanism of NaI-Mediated and Si-Induced Anionic Chain Reactions. J Am Chem Soc 2020; 142:14649-14663. [DOI: 10.1021/jacs.0c06751] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Andrés García-Domínguez
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Thomas H. West
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Johann J. Primozic
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Katie M. Grant
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Craig P. Johnston
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Grant G. Cumming
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K
| | - Andrew G. Leach
- School of Health Sciences, Stopford Building, The University of Manchester, Oxford Road, Manchester M13 9PT, U.K
| | - Guy C. Lloyd-Jones
- EaStChem, University of Edinburgh, Joseph Black Building, David Brewster Road, Edinburgh EH9 3FJ, U.K
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23
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Nozawa-Kumada K, Iwakawa Y, Onuma S, Shigeno M, Kondo Y. NaH-mediated direct C-H arylation in the presence of 1,10-phenanthroline. Chem Commun (Camb) 2020; 56:7773-7776. [PMID: 32573564 DOI: 10.1039/d0cc00730g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Transition-metal-free coupling of haloarenes with unactivated arenes has been developed in the presence of NaH and 1,10-phenanthroline. Various haloarenes bearing methyl, methoxy, halogen (fluoride, chloride, and bromide), cyano, trifluoromethyl, ester, and amide groups can be cross-coupled with unactivated arenes, or heteroarenes in this reaction.
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Affiliation(s)
- Kanako Nozawa-Kumada
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
| | - Yuki Iwakawa
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
| | - So Onuma
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
| | - Masanori Shigeno
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
| | - Yoshinori Kondo
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
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24
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Ong DY, Fan D, Dixon DJ, Chiba S. Transition-Metal-Free Reductive Functionalization of Tertiary Carboxamides and Lactams for α-Branched Amine Synthesis. Angew Chem Int Ed Engl 2020; 59:11903-11907. [PMID: 32329555 DOI: 10.1002/anie.202004272] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Indexed: 12/29/2022]
Abstract
A new method for the synthesis of α-branched amines by reductive functionalization of tertiary carboxamides and lactams is described. The process relies on the efficient and controlled reduction of tertiary amides by a sodium hydride/sodium iodide composite, in situ treatment of the resulting anionic hemiaminal with trimethylsilyl chloride and subsequent coupling with nucleophilic reagents including Grignard reagents and tetrabutylammonium cyanide. The new method exhibits broad functional-group compatibility, operates under transition-metal-free reaction conditions, and is suitable for various synthetic applications on both sub-millimole and on multigram scales.
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Affiliation(s)
- Derek Yiren Ong
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Dongyang Fan
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Darren J Dixon
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
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25
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Ong DY, Fan D, Dixon DJ, Chiba S. Transition‐Metal‐Free Reductive Functionalization of Tertiary Carboxamides and Lactams for α‐Branched Amine Synthesis. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004272] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Derek Yiren Ong
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Dongyang Fan
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Darren J. Dixon
- Department of Chemistry Chemistry Research Laboratory University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
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26
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Wang B, Ong DY, Li Y, Pang JH, Watanabe K, Takita R, Chiba S. Stereo-controlled anti-hydromagnesiation of aryl alkynes by magnesium hydrides. Chem Sci 2020; 11:5267-5272. [PMID: 34122983 PMCID: PMC8159320 DOI: 10.1039/d0sc01773f] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A concise protocol for anti-hydromagnesiation of aryl alkynes was established using 1 : 1 molar combination of sodium hydride (NaH) and magnesium iodide (MgI2) without the aid of any transition metal catalysts. The resulting alkenylmagnesium intermediates could be trapped with a series of electrophiles, thus providing facile accesses to stereochemically well-defined functionalized alkenes. Mechanistic studies by experimental and theoretical approaches imply that polar hydride addition from magnesium hydride (MgH2) is responsible for the process. Anti-hydromagnesiation of aryl alkynes was facilitated solely by magnesium hydride. The resulting alkenylmagnesium intermediates were functionalized with various electrophiles to afford stereochemically defined tri-substituted alkenes.![]()
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Affiliation(s)
- Bin Wang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University 637371 Singapore
| | - Derek Yiren Ong
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University 637371 Singapore
| | - Yihang Li
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University 637371 Singapore
| | - Jia Hao Pang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University 637371 Singapore
| | - Kohei Watanabe
- Graduate School of Pharmaceutical Sciences, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Ryo Takita
- Graduate School of Pharmaceutical Sciences, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University 637371 Singapore
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27
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Affiliation(s)
| | | | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University
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28
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Ong DY, Watanabe K, Takita R, Chiba S. Mechanistic Insights on Reduction of Carboxamides by Diisobutylaluminum Hydride and Sodium Hydride−Iodide Composite. Helv Chim Acta 2019. [DOI: 10.1002/hlca.201900166] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Derek Yiren Ong
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical SciencesNanyang Technological University Singapore 637371
| | - Kohei Watanabe
- Graduate School of Pharmaceutical SciencesThe University of Tokyo, 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Ryo Takita
- Graduate School of Pharmaceutical SciencesThe University of Tokyo, 7-3-1 Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical SciencesNanyang Technological University Singapore 637371
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29
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Asako S, Kodera M, Nakajima H, Takai K. Lithium‐Free Synthesis of Sodium 2,2,6,6‐Tetramethylpiperidide and Its Synthetic Applications. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900215] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Sobi Asako
- Division of Applied Chemistry, Graduate School of Natural Science and TechnologyOkayama University 3-1-1 Tsushimanaka, Kita-ku Okayama 700-8530 Japan
- Present Address: RIKEN Center for Sustainable Resource Science 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Masato Kodera
- Division of Applied Chemistry, Graduate School of Natural Science and TechnologyOkayama University 3-1-1 Tsushimanaka, Kita-ku Okayama 700-8530 Japan
| | - Hirotaka Nakajima
- Division of Applied Chemistry, Graduate School of Natural Science and TechnologyOkayama University 3-1-1 Tsushimanaka, Kita-ku Okayama 700-8530 Japan
| | - Kazuhiko Takai
- Division of Applied Chemistry, Graduate School of Natural Science and TechnologyOkayama University 3-1-1 Tsushimanaka, Kita-ku Okayama 700-8530 Japan
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30
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Shigeno M, Nakaji K, Nozawa-Kumada K, Kondo Y. Catalytic Amide–Base System of TMAF and N(TMS)3 for Deprotonative Coupling of Benzylic C(sp3)–H Bonds with Carbonyls. Org Lett 2019; 21:2588-2592. [DOI: 10.1021/acs.orglett.9b00550] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Masanori Shigeno
- Department of Biophysical Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Sendai, 980-8578, Japan
| | - Kunihito Nakaji
- Department of Biophysical Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Sendai, 980-8578, Japan
| | - Kanako Nozawa-Kumada
- Department of Biophysical Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Sendai, 980-8578, Japan
| | - Yoshinori Kondo
- Department of Biophysical Chemistry, Graduate School of Pharmaceutical Sciences, Tohoku University, Aoba, Sendai, 980-8578, Japan
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31
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Robertson SD, Uzelac M, Mulvey RE. Alkali-Metal-Mediated Synergistic Effects in Polar Main Group Organometallic Chemistry. Chem Rev 2019; 119:8332-8405. [DOI: 10.1021/acs.chemrev.9b00047] [Citation(s) in RCA: 122] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Stuart D. Robertson
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, U.K
| | - Marina Uzelac
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, U.K
| | - Robert E. Mulvey
- WestCHEM, Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow, G1 1XL, U.K
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32
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33
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Liu Y, Mao Y, Hu Y, Gui J, Wang L, Wang W, Zhang S. The Employment of Sodium Hydride as a Michael Donor in Palladium‐catalyzed Reductions of α, β‐Unsaturated Carbonyl Compounds. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801676] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Ye Liu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical SciencesSoochow University 199 Ren'ai Road, Suzhou Jiangsu 215123 People's Republic of China
| | - Yujian Mao
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical SciencesSoochow University 199 Ren'ai Road, Suzhou Jiangsu 215123 People's Republic of China
| | - Yanwei Hu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical SciencesSoochow University 199 Ren'ai Road, Suzhou Jiangsu 215123 People's Republic of China
| | - Jingjing Gui
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical SciencesSoochow University 199 Ren'ai Road, Suzhou Jiangsu 215123 People's Republic of China
| | - Liang Wang
- College of Chemistry and Pharmaceutical SciencesQingdao Agricultural University, Qingdao Shandong 266109 People's Republic of China
| | - Wei Wang
- State Key Laboratory of Bioengineering Reactor, and Shanghai Key Laboratory of New Drug Design, School of PharmacyEast China University of Science & Technology Shanghai 200237 People's Republic of China
- Department of Pharmacology and Toxicology, and BIO5 InstituteUniversity of Arizona 1703 E. Mabel St., P. O. Box 210207 Tucson AZ 85721-0207 USA
| | - Shilei Zhang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical SciencesSoochow University 199 Ren'ai Road, Suzhou Jiangsu 215123 People's Republic of China
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34
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Zhao H, Ma G, Xie X, Wang Y, Hao J, Wan W. Pd(ii)-Catalyzed decarboxylative meta-C–H difluoromethylation. Chem Commun (Camb) 2019; 55:3927-3930. [DOI: 10.1039/c9cc00984a] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Palladium(ii)-catalyzed decarboxylative meta-C–H difluoromethylation reactions have been developed. Initial mechanistic studies disclosed that a migratory insertion would be involved in this meta-selective C–H functionalization.
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Affiliation(s)
- Huaxin Zhao
- Department of Chemistry
- Shanghai University
- Shanghai
- China
| | - Guobin Ma
- School of Science
- Shanghai University
- China
| | - Xiaojuan Xie
- Department of Chemistry
- Shanghai University
- Shanghai
- China
| | - Yong Wang
- Department of Chemistry
- Shanghai University
- Shanghai
- China
| | - Jian Hao
- Department of Chemistry
- Shanghai University
- Shanghai
- China
| | - Wen Wan
- Department of Chemistry
- Shanghai University
- Shanghai
- China
- Key Laboratory of Organofluorine Chemistry
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35
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36
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37
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Pang JH, Kaga A, Chiba S. Nucleophilic amination of methoxypyridines by a sodium hydride-iodide composite. Chem Commun (Camb) 2018; 54:10324-10327. [PMID: 30141796 DOI: 10.1039/c8cc05979a] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A new protocol for nucleophilic amination of methoxypyridines and their derivatives was developed using sodium hydride (NaH) in the presence of lithium iodide (LiI). The method offers a concise access to various aminopyridines which are potentially of medicinal interest.
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Affiliation(s)
- Jia Hao Pang
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore.
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38
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Barham JP, Dalton SE, Allison M, Nocera G, Young A, John MP, McGuire T, Campos S, Tuttle T, Murphy JA. Dual Roles for Potassium Hydride in Haloarene Reduction: CSNAr and Single Electron Transfer Reduction via Organic Electron Donors Formed in Benzene. J Am Chem Soc 2018; 140:11510-11518. [DOI: 10.1021/jacs.8b07632] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Joshua P. Barham
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K
- GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K
| | - Samuel E. Dalton
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K
- GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K
| | - Mark Allison
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Giuseppe Nocera
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Allan Young
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - Matthew P. John
- GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K
| | - Thomas McGuire
- Medicinal Chemistry, Oncology, IMED Biotech Unit, AstraZeneca, 319 Milton Road, Cambridge CB4 0WG, U.K
| | - Sebastien Campos
- GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage SG1 2NY, U.K
| | - Tell Tuttle
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K
| | - John A. Murphy
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, U.K
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39
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Nocera G, Young A, Palumbo F, Emery KJ, Coulthard G, McGuire T, Tuttle T, Murphy JA. Electron Transfer Reactions: KO tBu (but not NaO tBu) Photoreduces Benzophenone under Activation by Visible Light. J Am Chem Soc 2018; 140:9751-9757. [PMID: 29996048 DOI: 10.1021/jacs.8b06089] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Long-standing controversial reports of electron transfer from KO tBu to benzophenone have been investigated and resolved. The mismatch in the oxidation potential of KO tBu (+0.10 V vs SCE in DMF) and the first reduction potential of benzophenone (of many values cited in the literature, the least negative value is -1.31 V vs SCE in DMF), preclude direct electron transfer. Experimental and computational results now establish that a complex is formed between the two reagents, with the potassium ion providing the linkage, which markedly shifts the absorption spectrum to provide a tail in the visible light region. Photoactivation at room temperature by irradiation at defined wavelength (365 or 400 nm), or even by winter daylight, leads to the development of the blue color of the potassium salt of benzophenone ketyl, whereas no reaction is observed when the reaction mixture is maintained in darkness. So, no electron transfer occurs in the ground state. However, when photoexcited, electron transfer occurs within a complex formed from benzophenone and KO tBu. TDDFT studies match experimental findings and also define the electronic transition within the complex as n → π*, originating on the butoxide oxygen. Computation and experiment also align in showing that this reaction is selective for KO tBu; no such effect occurs with NaO tBu, providing the first case where such alkali metal ion selectivity is rationalized in detail. Chemical evidence is provided for the photoactivated electron transfer from KO tBu to benzophenone: tert-butoxyl radicals are formed and undergo fragmentation to form (acetone and) methyl radicals, some of which are trapped by benzophenone. Likewise, when KOC(Et)3 is used in place of KO tBu, then ethylation of benzophenone is seen. Further evidence of electron transfer was seen when the reaction was conducted in benzene, in the presence of p-iodotoluene; this triggered BHAS coupling to form 4-methylbiphenyl in 74% yield.
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Affiliation(s)
- Giuseppe Nocera
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
| | - Allan Young
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
| | - Fabrizio Palumbo
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
| | - Katie J Emery
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
| | - Graeme Coulthard
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
| | - Thomas McGuire
- Medicinal Chemistry, Oncology, IMED Biotech Unit , AstraZeneca , 319 Milton Road , Cambridge CB4 0WG , U.K
| | - Tell Tuttle
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
| | - John A Murphy
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
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40
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Chan GH, Ong DY, Yen Z, Chiba S. Reduction of N
,N
-Dimethylcarboxamides to Aldehydes by Sodium Hydride-Iodide Composite. Helv Chim Acta 2018. [DOI: 10.1002/hlca.201800049] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Guo Hao Chan
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371
| | - Derek Yiren Ong
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371
| | - Zhihao Yen
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371
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41
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Mao Y, Liu Y, Hu Y, Wang L, Zhang S, Wang W. Pd-Catalyzed Debenzylation and Deallylation of Ethers and Esters with Sodium Hydride. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00185] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Yujian Mao
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, 199 Ren’ai Road, Suzhou, Jiangsu 215123, China
| | - Ye Liu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, 199 Ren’ai Road, Suzhou, Jiangsu 215123, China
| | - Yanwei Hu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, 199 Ren’ai Road, Suzhou, Jiangsu 215123, China
| | - Liang Wang
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, China
| | - Shilei Zhang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and College of Pharmaceutical Sciences, Soochow University, 199 Ren’ai Road, Suzhou, Jiangsu 215123, China
| | - Wei Wang
- State Key Laboratory of Bioengineering Reactor, and Shanghai Key Laboratory of New Drug Design, School of Pharmacy, East China University of Science and Technology, Shanghai 200237, China
- Department of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131-0001, United States
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42
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Konrad W, Bloesser FR, Wetzel KS, Boukis AC, Meier MAR, Barner‐Kowollik C. A Combined Photochemical and Multicomponent Reaction Approach to Precision Oligomers. Chemistry 2018; 24:3413-3419. [DOI: 10.1002/chem.201705939] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Indexed: 01/24/2023]
Affiliation(s)
- Waldemar Konrad
- Macromolecular Architectures, Institut für Technische Chemie und Polymerchemie Karlsruhe Institute of Technology (KIT) Engesserstrasse 18 76131 Karlsruhe Germany
- Institut für Biologische Grenzflächen Karlsruhe Institute of, Technology (KIT) Hermann-von-Helmholtz Platz 1 76344 Eggenstein-Leopoldshafen Germany
- School of Chemistry, Physics and Mechanical Engineering Queensland University of Technology (QUT) 2 George Street, QLD 4000 Brisbane Australia
| | - Fabian R. Bloesser
- Macromolecular Architectures, Institut für Technische Chemie und Polymerchemie Karlsruhe Institute of Technology (KIT) Engesserstrasse 18 76131 Karlsruhe Germany
- Institut für Biologische Grenzflächen Karlsruhe Institute of, Technology (KIT) Hermann-von-Helmholtz Platz 1 76344 Eggenstein-Leopoldshafen Germany
- School of Chemistry, Physics and Mechanical Engineering Queensland University of Technology (QUT) 2 George Street, QLD 4000 Brisbane Australia
- Laboratory of Applied Chemistry, Institut für Organische Chemie Karlsruhe Institute of Technology (KIT) Strasse am Forum 7 76131 Karlsruhe Germany
| | - Katharina S. Wetzel
- Laboratory of Applied Chemistry, Institut für Organische Chemie Karlsruhe Institute of Technology (KIT) Strasse am Forum 7 76131 Karlsruhe Germany
| | - Andreas C. Boukis
- Laboratory of Applied Chemistry, Institut für Organische Chemie Karlsruhe Institute of Technology (KIT) Strasse am Forum 7 76131 Karlsruhe Germany
| | - Michael A. R. Meier
- Laboratory of Applied Chemistry, Institut für Organische Chemie Karlsruhe Institute of Technology (KIT) Strasse am Forum 7 76131 Karlsruhe Germany
| | - Christopher Barner‐Kowollik
- Macromolecular Architectures, Institut für Technische Chemie und Polymerchemie Karlsruhe Institute of Technology (KIT) Engesserstrasse 18 76131 Karlsruhe Germany
- Institut für Biologische Grenzflächen Karlsruhe Institute of, Technology (KIT) Hermann-von-Helmholtz Platz 1 76344 Eggenstein-Leopoldshafen Germany
- School of Chemistry, Physics and Mechanical Engineering Queensland University of Technology (QUT) 2 George Street, QLD 4000 Brisbane Australia
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43
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Tejo C, Pang JH, Ong DY, Oi M, Uchiyama M, Takita R, Chiba S. Dearylation of arylphosphine oxides using a sodium hydride–iodide composite. Chem Commun (Camb) 2018; 54:1782-1785. [DOI: 10.1039/c8cc00289d] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new protocol for the dearylative functionalization of arylphosphine oxides was developed using NaH in the presence of LiI.
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Affiliation(s)
- Ciputra Tejo
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
- Singapore
| | - Jia Hao Pang
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
- Singapore
| | - Derek Yiren Ong
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
- Singapore
| | - Miku Oi
- Advanced Elements Chemistry Research Team
- RIKEN Center for Sustainable Resource Science, and Elements Chemistry Laboratory
- RIKEN
- Saitama 351-0198
- Japan
| | - Masanobu Uchiyama
- Advanced Elements Chemistry Research Team
- RIKEN Center for Sustainable Resource Science, and Elements Chemistry Laboratory
- RIKEN
- Saitama 351-0198
- Japan
| | - Ryo Takita
- Advanced Elements Chemistry Research Team
- RIKEN Center for Sustainable Resource Science, and Elements Chemistry Laboratory
- RIKEN
- Saitama 351-0198
- Japan
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry
- School of Physical and Mathematical Sciences
- Nanyang Technological University
- Singapore 637371
- Singapore
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44
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Hokamp T, Dewanji A, Lübbesmeyer M, Mück‐Lichtenfeld C, Würthwein E, Studer A. Radical Hydrodehalogenation of Aryl Bromides and Chlorides with Sodium Hydride and 1,4-Dioxane. Angew Chem Int Ed Engl 2017; 56:13275-13278. [PMID: 28841248 PMCID: PMC5698765 DOI: 10.1002/anie.201706534] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Indexed: 11/24/2022]
Abstract
A practical method for radical chain reduction of various aryl bromides and chlorides is introduced. The thermal process uses NaH and 1,4-dioxane as reagents and 1,10-phenanthroline as an initiator. Hydrodehalogenation can be combined with typical cyclization reactions, proving the nature of the radical mechanism. These chain reactions proceed by electron catalysis. DFT calculations and mechanistic studies support the suggested mechanism.
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Affiliation(s)
- Tobias Hokamp
- Organisch-Chemisches InstitutWestfälische Wilhelms-UniversitätCorrensstraße 4048149MünsterGermany
| | - Abhishek Dewanji
- Organisch-Chemisches InstitutWestfälische Wilhelms-UniversitätCorrensstraße 4048149MünsterGermany
| | - Maximilian Lübbesmeyer
- Organisch-Chemisches InstitutWestfälische Wilhelms-UniversitätCorrensstraße 4048149MünsterGermany
| | | | - Ernst‐Ulrich Würthwein
- Organisch-Chemisches InstitutWestfälische Wilhelms-UniversitätCorrensstraße 4048149MünsterGermany
| | - Armido Studer
- Organisch-Chemisches InstitutWestfälische Wilhelms-UniversitätCorrensstraße 4048149MünsterGermany
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45
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Hokamp T, Dewanji A, Lübbesmeyer M, Mück-Lichtenfeld C, Würthwein EU, Studer A. Radikalische Hydrodehalogenierung von Arylbromiden und -chloriden mit Natriumhydrid und 1,4-Dioxan. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706534] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tobias Hokamp
- Organisch-Chemisches Institut; Westfälische Wilhelms-Universität; Corrensstraße 40 48149 Münster Deutschland
| | - Abhishek Dewanji
- Organisch-Chemisches Institut; Westfälische Wilhelms-Universität; Corrensstraße 40 48149 Münster Deutschland
| | - Maximilian Lübbesmeyer
- Organisch-Chemisches Institut; Westfälische Wilhelms-Universität; Corrensstraße 40 48149 Münster Deutschland
| | - Christian Mück-Lichtenfeld
- Organisch-Chemisches Institut; Westfälische Wilhelms-Universität; Corrensstraße 40 48149 Münster Deutschland
| | - Ernst-Ulrich Würthwein
- Organisch-Chemisches Institut; Westfälische Wilhelms-Universität; Corrensstraße 40 48149 Münster Deutschland
| | - Armido Studer
- Organisch-Chemisches Institut; Westfälische Wilhelms-Universität; Corrensstraße 40 48149 Münster Deutschland
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46
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Kaga A, Hayashi H, Hakamata H, Oi M, Uchiyama M, Takita R, Chiba S. Nucleophilic Amination of Methoxy Arenes Promoted by a Sodium Hydride/Iodide Composite. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705916] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Atsushi Kaga
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Hirohito Hayashi
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Hiroyuki Hakamata
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Miku Oi
- Advanced Elements Chemistry Research Team; RIKEN Center for Sustainable Resource Science and Elements Chemistry Laboratory; RIKEN; 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan
- Graduate School of Pharmaceutical Sciences; The University of Tokyo; 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan
| | - Masanobu Uchiyama
- Advanced Elements Chemistry Research Team; RIKEN Center for Sustainable Resource Science and Elements Chemistry Laboratory; RIKEN; 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan
- Graduate School of Pharmaceutical Sciences; The University of Tokyo; 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan
| | - Ryo Takita
- Advanced Elements Chemistry Research Team; RIKEN Center for Sustainable Resource Science and Elements Chemistry Laboratory; RIKEN; 2-1 Hirosawa Wako-shi Saitama 351-0198 Japan
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
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47
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Kaga A, Hayashi H, Hakamata H, Oi M, Uchiyama M, Takita R, Chiba S. Nucleophilic Amination of Methoxy Arenes Promoted by a Sodium Hydride/Iodide Composite. Angew Chem Int Ed Engl 2017; 56:11807-11811. [PMID: 28741890 DOI: 10.1002/anie.201705916] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 07/13/2017] [Indexed: 11/09/2022]
Abstract
A method for the nucleophilic amination of methoxy arenes was established by using sodium hydride (NaH) in the presence of lithium iodide (LiI). This method offers an efficient route to benzannulated nitrogen heterocycles. Mechanistic studies showed that the reaction proceeds through an unusual concerted nucleophilic aromatic substitution.
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Affiliation(s)
- Atsushi Kaga
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Hirohito Hayashi
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Hiroyuki Hakamata
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Miku Oi
- Advanced Elements Chemistry Research Team, RIKEN Center for Sustainable Resource Science and Elements Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan.,Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Masanobu Uchiyama
- Advanced Elements Chemistry Research Team, RIKEN Center for Sustainable Resource Science and Elements Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan.,Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Ryo Takita
- Advanced Elements Chemistry Research Team, RIKEN Center for Sustainable Resource Science and Elements Chemistry Laboratory, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama, 351-0198, Japan
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
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