1
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Constantin T, Górski B, Tilby MJ, Chelli S, Juliá F, Llaveria J, Gillen KJ, Zipse H, Lakhdar S, Leonori D. Halogen-atom and group transfer reactivity enabled by hydrogen tunneling. Science 2022; 377:1323-1328. [DOI: 10.1126/science.abq8663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
The generation of carbon radicals by halogen-atom and group transfer reactions is generally achieved using tin and silicon reagents that maximize the interplay of enthalpic (thermodynamic) and polar (kinetic) effects. In this work, we demonstrate a distinct reactivity mode enabled by quantum mechanical tunneling that uses the cyclohexadiene derivative γ-terpinene as the abstractor under mild photochemical conditions. This protocol activates alkyl and aryl halides as well as several alcohol and thiol derivatives. Experimental and computational studies unveiled a noncanonical pathway whereby a cyclohexadienyl radical undergoes concerted aromatization and halogen-atom or group abstraction through the reactivity of an effective H atom. This activation mechanism is seemingly thermodynamically and kinetically unfavorable but is rendered feasible through quantum tunneling.
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Affiliation(s)
| | - Bartosz Górski
- Department of Chemistry, University of Manchester, Manchester M13 9PL, UK
| | - Michael J. Tilby
- Department of Chemistry, University of Manchester, Manchester M13 9PL, UK
| | - Saloua Chelli
- CNRS/Université Toulouse III—Paul Sabatier, Laboratoire Hétérochimie Fondamentale et Appliquée, LHFA UMR 5069, 31062 Toulouse Cedex 09, France
| | - Fabio Juliá
- Department of Chemistry, University of Manchester, Manchester M13 9PL, UK
| | - Josep Llaveria
- Global Discovery Chemistry, Therapeutics Discovery, Janssen Research & Development, Janssen-Cilag S.A., 45007 Toledo, Spain
| | - Kevin J. Gillen
- LifeArc, Accelerator Building, Open Innovation Campus, Stevenage SG1 2FX, UK
| | - Hendrik Zipse
- Department Chemie, LMU München, D-81377 München, Germany
| | - Sami Lakhdar
- CNRS/Université Toulouse III—Paul Sabatier, Laboratoire Hétérochimie Fondamentale et Appliquée, LHFA UMR 5069, 31062 Toulouse Cedex 09, France
| | - Daniele Leonori
- Institute of Organic Chemistry, RWTH Aachen University, 52056 Aachen, Germany
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2
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Griffiths OM, Ley SV. Multicomponent Direct Assembly of N-Heterospirocycles Facilitated by Visible-Light-Driven Photocatalysis. J Org Chem 2022; 87:13204-13223. [PMID: 36103403 PMCID: PMC9552240 DOI: 10.1021/acs.joc.2c01684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
N-heterospirocycles are interesting
structural
units found in both natural products and medicinal compounds but have
relatively few reliable methods for their synthesis. Here, we enlist
the photocatalytic generation of N-centered radicals
to construct β-spirocyclic pyrrolidines from N-allylsulfonamides and alkenes. A variety of β-spirocyclic
pyrrolidines have been constructed, including drug derivatives, in
moderate to very good yields. Further derivatization of the products
has also been demonstrated as has a viable scale-up procedure, making
use of flow chemistry techniques.
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Affiliation(s)
- Oliver M. Griffiths
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, U.K
| | - Steven V. Ley
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, U.K
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3
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Anwar K, Merkens K, Aguilar Troyano FJ, Gómez-Suárez A. Radical Deoxyfunctionalisation Strategies. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200330] [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)
- Khadijah Anwar
- Bergische Universität Wuppertal: Bergische Universitat Wuppertal Organic Chemistry GERMANY
| | - Kay Merkens
- Bergische Universität Wuppertal: Bergische Universitat Wuppertal Organic Chemstry GERMANY
| | | | - Adrián Gómez-Suárez
- Bergische Universitat Wuppertal Organische Chemie Gaußstr. 20 42119 Wuppertal GERMANY
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4
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Griffiths OM, Esteves HA, Chen Y, Sowa K, May OS, Morse P, Blakemore DC, Ley SV. Photoredox-Catalyzed Dehydrogenative Csp 3-Csp 2 Cross-Coupling of Alkylarenes to Aldehydes in Flow. J Org Chem 2021; 86:13559-13571. [PMID: 34524825 DOI: 10.1021/acs.joc.1c01621] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Executing photoredox reactions in flow offers solutions to frequently encountered issues regarding reproducibility, reaction time, and scale-up. Here, we report the transfer of a photoredox-catalyzed benzylic coupling of alkylarenes to aldehydes to a flow chemistry setting leading to improvements in terms of higher concentration, shorter residence times, better yields, ease of catalyst preparation, and enhanced substrate scope. Its applicability has been demonstrated by a multi-gram-scale reaction using high-power light-emitting diodes (LEDs), late-stage functionalization of selected active pharmaceutical ingredients (APIs), and also a photocatalyst recycling method.
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Affiliation(s)
- Oliver M Griffiths
- Yusuf Hamied Department of Chemistry, University of Cambridge, CB2 1EW Cambridge, U.K
| | - Henrique A Esteves
- Yusuf Hamied Department of Chemistry, University of Cambridge, CB2 1EW Cambridge, U.K
| | - Yiding Chen
- Yusuf Hamied Department of Chemistry, University of Cambridge, CB2 1EW Cambridge, U.K
| | - Karin Sowa
- Yusuf Hamied Department of Chemistry, University of Cambridge, CB2 1EW Cambridge, U.K.,Department of Chemistry, University of Münster, 48149 Münster, Germany
| | - Oliver S May
- Yusuf Hamied Department of Chemistry, University of Cambridge, CB2 1EW Cambridge, U.K
| | - Peter Morse
- Medicine Design, Pfizer, Inc., Groton, Connecticut 06340, United States
| | - David C Blakemore
- Medicine Design, Pfizer, Inc., Groton, Connecticut 06340, United States
| | - Steven V Ley
- Yusuf Hamied Department of Chemistry, University of Cambridge, CB2 1EW Cambridge, U.K
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5
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González-Esguevillas M, Fernández DF, Rincón JA, Barberis M, de Frutos O, Mateos C, García-Cerrada S, Agejas J, MacMillan DWC. Rapid Optimization of Photoredox Reactions for Continuous-Flow Systems Using Microscale Batch Technology. ACS CENTRAL SCIENCE 2021; 7:1126-1134. [PMID: 34345665 PMCID: PMC8323116 DOI: 10.1021/acscentsci.1c00303] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Indexed: 05/03/2023]
Abstract
Photoredox catalysis has emerged as a powerful and versatile platform for the synthesis of complex molecules. While photocatalysis is already broadly used in small-scale batch chemistry across the pharmaceutical sector, recent efforts have focused on performing these transformations in process chemistry due to the inherent challenges of batch photocatalysis on scale. However, translating optimized batch conditions to flow setups is challenging, and a general approach that is rapid, convenient, and inexpensive remains largely elusive. Herein, we report the development of a new approach that uses a microscale high-throughput experimentation (HTE) platform to identify optimal reaction conditions that can be directly translated to flow systems. A key design point is to simulate the flow-vessel pathway within a microscale reaction plate, which enables the rapid identification of optimal flow reaction conditions using only a small number of simultaneous experiments. This approach has been validated against a range of widely used photoredox reactions and, importantly, was found to translate accurately to several commercial flow reactors. We expect that the generality and operational efficiency of this new HTE approach to photocatalysis will allow rapid identification of numerous flow protocols for scale.
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Affiliation(s)
| | - David F. Fernández
- Merck
Center for Catalysis at Princeton University, Princeton, New Jersey 08544, United States
| | - Juan A. Rincón
- Centro
de Investigación Eli Lilly, S. A., Avda. de la Industria 30, 28108 Alcobendas, Madrid, Spain
| | - Mario Barberis
- Centro
de Investigación Eli Lilly, S. A., Avda. de la Industria 30, 28108 Alcobendas, Madrid, Spain
| | - Oscar de Frutos
- Centro
de Investigación Eli Lilly, S. A., Avda. de la Industria 30, 28108 Alcobendas, Madrid, Spain
| | - Carlos Mateos
- Centro
de Investigación Eli Lilly, S. A., Avda. de la Industria 30, 28108 Alcobendas, Madrid, Spain
| | - Susana García-Cerrada
- Centro
de Investigación Eli Lilly, S. A., Avda. de la Industria 30, 28108 Alcobendas, Madrid, Spain
| | - Javier Agejas
- Centro
de Investigación Eli Lilly, S. A., Avda. de la Industria 30, 28108 Alcobendas, Madrid, Spain
| | - David W. C. MacMillan
- Merck
Center for Catalysis at Princeton University, Princeton, New Jersey 08544, United States
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6
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Liu XG, Dong CS, Li F, Zhang B. Manganese-Mediated Direct Functionalization of Hantzsch Esters with Alkyl Iodides via an Aromatization-Dearomatization Strategy. Org Lett 2021; 23:4002-4007. [PMID: 33978430 DOI: 10.1021/acs.orglett.1c01210] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
We report, for the first time, manganese-mediated direct functionalization of the Hantzsch esters with readily accessible alkyl iodides through an aromatization-dearomatization strategy. Applying this protocol, a library of valuable 4-alkyl-1,4-dihydropyridines were facilely afforded in good yields. This simple and practical reaction proceeds under visible-light irradiation at room temperature and displays high functional-group compatibility. Additionally, the method is applicable for gram-scale synthesis and late-stage functionalization of complex molecules.
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Affiliation(s)
- Xian-Guan Liu
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Ci-Shuang Dong
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Fei Li
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
| | - Bo Zhang
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
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7
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Epifanov M, Mo JY, Dubois R, Yu H, Sammis GM. One-Pot Deoxygenation and Substitution of Alcohols Mediated by Sulfuryl Fluoride. J Org Chem 2021; 86:3768-3777. [PMID: 33567820 DOI: 10.1021/acs.joc.0c02557] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Sulfuryl fluoride is a valuable reagent for the one-pot activation and derivatization of aliphatic alcohols, but the highly reactive alkyl fluorosulfate intermediates limit both the types of reactions that can be accessed as well as the scope. Herein, we report the SO2F2-mediated alcohol substitution and deoxygenation method that relies on the conversion of fluorosulfates to alkyl halide intermediates. This strategy allows the expansion of SO2F2-mediated one-pot processes to include radical reactions, where the alkyl halides can also be exploited in the one-pot deoxygenation of primary alcohols under mild conditions (52-95% yield). This strategy can also enhance the scope of substitutions to nucleophiles that are previously incompatible with one-pot SO2F2-mediated alcohol activation and enables substitution of primary and secondary alcohols in 54-95% yield. Chiral secondary alcohols undergo a highly stereospecific (90-98% ee) double nucleophilic displacement with an overall retention of configuration.
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Affiliation(s)
- Maxim Epifanov
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Jia Yi Mo
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Rudy Dubois
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Hao Yu
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Glenn M Sammis
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
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8
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Cao D, Chen Z, Lv L, Zeng H, Peng Y, Li CJ. Light-Driven Metal-Free Direct Deoxygenation of Alcohols under Mild Conditions. iScience 2020; 23:101419. [PMID: 32798970 PMCID: PMC7452908 DOI: 10.1016/j.isci.2020.101419] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/02/2020] [Accepted: 07/24/2020] [Indexed: 12/18/2022] Open
Abstract
Hydroxyl is widely found in organic molecules as functional group and its deprivation plays an inevitable role in organic synthesis. However, the direct cleavage of Csp3-O bond in alcohols with high selectivity and efficiency, especially without the assistance of metal catalyst, has been a formidable challenge because of its strong bond dissociation energy and unfavorable thermodynamics. Herein, an efficient metal-free strategy that enables direct deoxygenation of alcohols has been developed for the first time, with hydrazine as the reductant induced by light. This protocol features mild reaction conditions, excellent functional group tolerance, and abundant and easily available starting materials, rendering selective deoxygenation of a variety of 1° and 2° alcohols, vicinal diols, and β-1 and even β-O-4 models of natural wood lignin. This strategy is also highlighted by its “traceless” and non-toxic by-products N2 and H2, as readily escapable gases. Mechanistic studies demonstrated dimethyl sulfide being a key intermediate in this transformation. Metal-free direct deoxygenation of alcohols enabled by light Traceless non-toxic N2 and H2 as by-products Broad substrate scope and wide functional group compatibility Converting lignin models into simple aromatics
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Affiliation(s)
- Dawei Cao
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada; Key Laboratory of Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology and Electron Microscopy Centre, Lanzhou University, Lanzhou 730000, P. R. China; The State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Zhangpei Chen
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada
| | - Leiyang Lv
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada
| | - Huiying Zeng
- The State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Yong Peng
- Key Laboratory of Magnetism and Magnetic Materials of the Ministry of Education, School of Physical Science and Technology and Electron Microscopy Centre, Lanzhou University, Lanzhou 730000, P. R. China
| | - Chao-Jun Li
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke St. West, Montreal, QC H3A 0B8, Canada.
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9
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Colella M, Tota A, Takahashi Y, Higuma R, Ishikawa S, Degennaro L, Luisi R, Nagaki A. Fluoro‐Substituted Methyllithium Chemistry: External Quenching Method Using Flow Microreactors. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202003831] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Marco Colella
- Department of Pharmacy—Drug SciencesFlow Chemistry and Microreactor Technology FLAME-LabUniversity of Bari “A. Moro” Via E. Orabona 4 70125 Bari Italy
| | - Arianna Tota
- Department of Pharmacy—Drug SciencesFlow Chemistry and Microreactor Technology FLAME-LabUniversity of Bari “A. Moro” Via E. Orabona 4 70125 Bari Italy
| | - Yusuke Takahashi
- Department of Synthetic and Biological ChemistryGraduate School of EngineeringKyoto University Nishikyo-ku Kyoto 615-8510 Japan
| | - Ryosuke Higuma
- Department of Synthetic and Biological ChemistryGraduate School of EngineeringKyoto University Nishikyo-ku Kyoto 615-8510 Japan
| | - Susumu Ishikawa
- Department of Synthetic and Biological ChemistryGraduate School of EngineeringKyoto University Nishikyo-ku Kyoto 615-8510 Japan
| | - Leonardo Degennaro
- Department of Pharmacy—Drug SciencesFlow Chemistry and Microreactor Technology FLAME-LabUniversity of Bari “A. Moro” Via E. Orabona 4 70125 Bari Italy
| | - Renzo Luisi
- Department of Pharmacy—Drug SciencesFlow Chemistry and Microreactor Technology FLAME-LabUniversity of Bari “A. Moro” Via E. Orabona 4 70125 Bari Italy
| | - Aiichiro Nagaki
- Department of Synthetic and Biological ChemistryGraduate School of EngineeringKyoto University Nishikyo-ku Kyoto 615-8510 Japan
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10
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Colella M, Tota A, Takahashi Y, Higuma R, Ishikawa S, Degennaro L, Luisi R, Nagaki A. Fluoro‐Substituted Methyllithium Chemistry: External Quenching Method Using Flow Microreactors. Angew Chem Int Ed Engl 2020; 59:10924-10928. [DOI: 10.1002/anie.202003831] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 03/30/2020] [Indexed: 12/11/2022]
Affiliation(s)
- Marco Colella
- Department of Pharmacy—Drug SciencesFlow Chemistry and Microreactor Technology FLAME-LabUniversity of Bari “A. Moro” Via E. Orabona 4 70125 Bari Italy
| | - Arianna Tota
- Department of Pharmacy—Drug SciencesFlow Chemistry and Microreactor Technology FLAME-LabUniversity of Bari “A. Moro” Via E. Orabona 4 70125 Bari Italy
| | - Yusuke Takahashi
- Department of Synthetic and Biological ChemistryGraduate School of EngineeringKyoto University Nishikyo-ku Kyoto 615-8510 Japan
| | - Ryosuke Higuma
- Department of Synthetic and Biological ChemistryGraduate School of EngineeringKyoto University Nishikyo-ku Kyoto 615-8510 Japan
| | - Susumu Ishikawa
- Department of Synthetic and Biological ChemistryGraduate School of EngineeringKyoto University Nishikyo-ku Kyoto 615-8510 Japan
| | - Leonardo Degennaro
- Department of Pharmacy—Drug SciencesFlow Chemistry and Microreactor Technology FLAME-LabUniversity of Bari “A. Moro” Via E. Orabona 4 70125 Bari Italy
| | - Renzo Luisi
- Department of Pharmacy—Drug SciencesFlow Chemistry and Microreactor Technology FLAME-LabUniversity of Bari “A. Moro” Via E. Orabona 4 70125 Bari Italy
| | - Aiichiro Nagaki
- Department of Synthetic and Biological ChemistryGraduate School of EngineeringKyoto University Nishikyo-ku Kyoto 615-8510 Japan
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11
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Synthesis of Biaryls Having a Piperidylmethyl Group Based on Space Integration of Lithiation, Borylation, and Suzuki-Miyaura Coupling. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901729] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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12
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Affiliation(s)
- Jong-Hwa Shon
- Department of Chemistry, University of Houston, Houston, TX, USA
| | - Thomas S. Teets
- Department of Chemistry, University of Houston, Houston, TX, USA
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13
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Nakahara Y, Furusawa M, Endo Y, Shimazaki T, Ohtsuka K, Takahashi Y, Jiang Y, Nagaki A. Practical Continuous‐Flow Controlled/Living Anionic Polymerization. Chem Eng Technol 2019. [DOI: 10.1002/ceat.201900160] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yuichi Nakahara
- Kyoto University Micro Chemical Production Study Consortium in Kyoto University Nishikyo-ku 615-8510 Kyoto Japan
- Ajinomoto Co., Inc. New Frontiers Research Group, Frontier Research Labs., Institute for Innovation 1-1 Suzuki-cho, Kawasaki-ku 210-8681 Kanagawa Japan
| | - Mai Furusawa
- Kyoto University Micro Chemical Production Study Consortium in Kyoto University Nishikyo-ku 615-8510 Kyoto Japan
- TOHO Chemical Industry Co., Ltd. Oppama Research Laboratory 5-2931, Urago-cho, Yokosuka-shi 237-0062 Kanagawa Japan
| | - Yuta Endo
- Kyoto University Micro Chemical Production Study Consortium in Kyoto University Nishikyo-ku 615-8510 Kyoto Japan
- Ajinomoto Co., Inc. Isolation And Purification Group, Process Development Section, Process Development Labs, Research Institute for Bioscience Products and Fine Chemicals 1-1 Suzuki-cho, Kawasakiku 210-8681 Kanagawa Japan
| | - Toshiya Shimazaki
- Kyoto University Micro Chemical Production Study Consortium in Kyoto University Nishikyo-ku 615-8510 Kyoto Japan
- Japan, Tacmina Co. 2-2-14 Awajimachi, Chuo-ku 541-0047 Osaka Japan
| | - Keita Ohtsuka
- Kyoto University Micro Chemical Production Study Consortium in Kyoto University Nishikyo-ku 615-8510 Kyoto Japan
- Sankoh Seiki Kougyou Co., Ltd. 2-7-2, Keihinjima, Ota-ku 143-0003 Tokyo Japan
| | - Yusuke Takahashi
- Kyoto University Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering Nishikyo-ku 615-8510 Kyoto Japan
| | - Yiyuan Jiang
- Kyoto University Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering Nishikyo-ku 615-8510 Kyoto Japan
| | - Aiichiro Nagaki
- Kyoto University Micro Chemical Production Study Consortium in Kyoto University Nishikyo-ku 615-8510 Kyoto Japan
- Kyoto University Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering Nishikyo-ku 615-8510 Kyoto Japan
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14
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Abstract
Abstract
In the new millennium the well-established paradigms of organic photochemistry have come alive as the basis for a wide range of synthetic methodologies that take advantage of the enhanced redox properties of excited states. While many strategies have been developed using rare, expensive and non-reusable catalysts, the road forward should include catalysts based on more abundant elements and reusable materials. This green road leads to the exploration of heterogeneous systems that can be eventually adapted for flow photocatalysis, and also adopted for the solution of environmental problems such as water treatment and fuel generation using solar radiation. If heterogeneous photocatalysis can play a role in supplying solutions to drug synthesis, energy and potable water supplies, then photochemistry will have an unprecedented societal impact.
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Affiliation(s)
- Juan C. Scaiano
- Department of Chemistry and Biomolecular Science, Centre for Advanced Materials Research (CAMaR) , University of Ottawa , 10 Marie Curie, Ottawa , ON K1N 6N5 , Canada
| | - Anabel E. Lanterna
- Department of Chemistry and Biomolecular Science, Centre for Advanced Materials Research (CAMaR) , University of Ottawa , 10 Marie Curie, Ottawa , ON K1N 6N5 , Canada
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15
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Nagaki A, Jiang Y, Yamashita H, Takabayashi N, Takahashi Y, Yoshida JI. Monolithiation of 5,5′‐Dibromo‐2,2′‐bithiophene Using Flow Microreactors: Mechanistic Implications and Synthetic Applications. Chem Eng Technol 2019. [DOI: 10.1002/ceat.201900057] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Aiichiro Nagaki
- Kyoto University Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering Nishikyo-ku 615-8510 Kyoto Japan
| | - Yiyuan Jiang
- Kyoto University Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering Nishikyo-ku 615-8510 Kyoto Japan
| | - Hiroki Yamashita
- Kyoto University Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering Nishikyo-ku 615-8510 Kyoto Japan
| | - Naoshi Takabayashi
- Kyoto University Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering Nishikyo-ku 615-8510 Kyoto Japan
| | - Yusuke Takahashi
- Kyoto University Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering Nishikyo-ku 615-8510 Kyoto Japan
| | - Jun-ichi Yoshida
- National Institute of Technology Suzuka College Shiroko-cho 510-0294 Suzuka, Mie Japan
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16
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Ruffoni A, Juliá F, Svejstrup TD, McMillan AJ, Douglas JJ, Leonori D. Practical and regioselective amination of arenes using alkyl amines. Nat Chem 2019; 11:426-433. [PMID: 31011173 DOI: 10.1038/s41557-019-0254-5] [Citation(s) in RCA: 160] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Accepted: 03/12/2019] [Indexed: 12/31/2022]
Abstract
The formation of carbon-nitrogen bonds for the preparation of aromatic amines is among the top five reactions carried out globally for the production of high-value materials, ranging from from bulk chemicals to pharmaceuticals and polymers. As a result of this ubiquity and diversity, methods for their preparation impact the full spectrum of chemical syntheses in academia and industry. In general, these molecules are assembled through the stepwise introduction of a reactivity handle in place of an aromatic C-H bond (that is, a nitro group, halogen or boronic acid) and a subsequent functionalization or cross-coupling. Here we show that aromatic amines can be constructed by direct reaction of arenes and alkyl amines using photocatalysis, without the need for pre-functionalization. The process enables the easy preparation of advanced building blocks, tolerates a broad range of functionalities, and multigram scale can be achieved via a batch-to-flow protocol. The merit of this strategy as a late-stage functionalization platform has been demonstrated by the modification of several drugs, agrochemicals, peptides, chiral catalysts, polymers and organometallic complexes.
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Affiliation(s)
| | - Fabio Juliá
- School of Chemistry, University of Manchester, Manchester, UK
| | | | | | - James J Douglas
- Early Chemical Development, Pharmaceutical Sciences, IMED Biotech Unit, AstraZeneca, Macclesfield, UK
| | - Daniele Leonori
- School of Chemistry, University of Manchester, Manchester, UK.
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17
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Nagaki A, Sasatsuki K, Ishiuchi S, Miuchi N, Takumi M, Yoshida JI. Synthesis of Functionalized Ketones from Acid Chlorides and Organolithiums by Extremely Fast Micromixing. Chemistry 2019; 25:4946-4950. [PMID: 30775815 DOI: 10.1002/chem.201900743] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Indexed: 01/03/2023]
Abstract
Synthesis of ketones containing various functional groups from acid chlorides bearing electrophilic functional groups and functionalized organolithiums was achieved using a flow microreactor system. Extremely fast mixing is important for high chemoselectivity.
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Affiliation(s)
- Aiichiro Nagaki
- Department of Synthetic and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Kengo Sasatsuki
- Department of Synthetic and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Satoshi Ishiuchi
- Department of Synthetic and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Nobuyuki Miuchi
- Department of Synthetic and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Masahiro Takumi
- Department of Synthetic and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto, 615-8510, Japan
| | - Jun-Ichi Yoshida
- National Institute of Technology, Suzuka College, Emeritus Professor, Kyoto University, Shiroko-cho, Suzuka, Mie, 510-0294, Japan
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18
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Suzuki–Miyaura Coupling Using Monolithic Pd Reactors and Scaling-Up by Series Connection of the Reactors. Catalysts 2019. [DOI: 10.3390/catal9030300] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
The space integration of the lithiation of aryl halides, the borylation of aryllithiums, and Suzuki–Miyaura coupling using a Pd catalyst supported by a polymer monolith flow reactor without using an intentionally added base was achieved. To scale up the process, a series connection of the monolith Pd reactor was examined. To suppress the increase in the pressure drop caused by the series connection, a monolith reactor having larger pore sizes was developed by varying the temperature of the monolith preparation. The monolithic Pd reactor having larger pore sizes enabled Suzuki–Miyaura coupling at a higher flow rate because of a lower pressure drop and, therefore, an increase in productivity. The present study indicates that series connection of the reactors with a higher flow rate serves as a good method for increasing the productivity without decreasing the yields.
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19
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Bogdan AR, Dombrowski AW. Emerging Trends in Flow Chemistry and Applications to the Pharmaceutical Industry. J Med Chem 2019; 62:6422-6468. [DOI: 10.1021/acs.jmedchem.8b01760] [Citation(s) in RCA: 110] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Andrew R. Bogdan
- Discovery Chemistry and Technology, AbbVie, Inc. 1 North Waukegan Road, North Chicago, Illinois 60064, United States
| | - Amanda W. Dombrowski
- Discovery Chemistry and Technology, AbbVie, Inc. 1 North Waukegan Road, North Chicago, Illinois 60064, United States
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20
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Endo Y, Furusawa M, Shimazaki T, Takahashi Y, Nakahara Y, Nagaki A. Molecular Weight Distribution of Polymers Produced by Anionic Polymerization Enables Mixability Evaluation. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.8b00403] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yuta Endo
- Micro Chemical Production Study Consortium in Kyoto University, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Isolation And Purification Group, Process Development Section, Process Development Labs, Research Institute For Bioscience Products & Fine Chemicals, Ajinomoto Co., Inc., 1-1 Suzuki-cho, Kawasaki-ku, Kanagawa 210-8681, Japan
| | - Mai Furusawa
- Micro Chemical Production Study Consortium in Kyoto University, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Oppama Research Laboratory, Toho Chemical Industry Co., Ltd., 5-2931, Urago-cho, Yokosuka-shi, Kanagawa 237-0062, Japan
| | - Toshiya Shimazaki
- Micro Chemical Production Study Consortium in Kyoto University, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Tacmina Co., 2-2-14 Awajimachi, Chuo-ku, Osaka 541-0047, Japan
| | - Yusuke Takahashi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yuichi Nakahara
- Micro Chemical Production Study Consortium in Kyoto University, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- New Frontiers Research Group, Frontier Research Labs., Institute For Innovation, Ajinomoto Co., Inc., 1-1 Suzuki-cho, Kawasaki-ku, Kanagawa 210-8681, Japan
| | - Aiichiro Nagaki
- Micro Chemical Production Study Consortium in Kyoto University, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
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21
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Wang X, Li H, Qiu G, Wu J. Substituted Hantzsch esters as radical reservoirs with the insertion of sulfur dioxide under photoredox catalysis. Chem Commun (Camb) 2019; 55:2062-2065. [DOI: 10.1039/c8cc10246e] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A three-component reaction between 4-substituted Hantzsch esters, DABCO·(SO2)2, and vinyl azides in the presence of photoredox catalysts under visible light irradiation is developed. A range of (Z)-2-(alkylsulfonyl)-1-arylethen-1-amines is obtained in moderate to good yields with good regioselectivity and stereoselectivity.
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Affiliation(s)
- Xuefeng Wang
- Department of Chemistry
- Fudan University
- 2005 Songhu Road
- Shanghai 200438
- China
| | - Haozhe Li
- Department of Chemistry
- Fudan University
- 2005 Songhu Road
- Shanghai 200438
- China
| | - Guanyinsheng Qiu
- Department of Chemistry
- Fudan University
- 2005 Songhu Road
- Shanghai 200438
- China
| | - Jie Wu
- Department of Chemistry
- Fudan University
- 2005 Songhu Road
- Shanghai 200438
- China
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22
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Affiliation(s)
- Baokun Qiao
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province; Henan University; Kaifeng, Henan P. R. China 475004
| | - Zhiyong Jiang
- Key Laboratory of Natural Medicine and Immuno-Engineering of Henan Province; Henan University; Kaifeng, Henan P. R. China 475004
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23
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Corrigan N, Shanmugam S, Xu J, Boyer C. Photocatalysis in organic and polymer synthesis. Chem Soc Rev 2018; 45:6165-6212. [PMID: 27819094 DOI: 10.1039/c6cs00185h] [Citation(s) in RCA: 454] [Impact Index Per Article: 75.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This review, with over 600 references, summarizes the recent applications of photoredox catalysis for organic transformation and polymer synthesis. Photoredox catalysts are metallo- or organo-compounds capable of absorbing visible light, resulting in an excited state species. This excited state species can donate or accept an electron from other substrates to mediate redox reactions at ambient temperature with high atom efficiency. These catalysts have been successfully implemented for the discovery of novel organic reactions and synthesis of added-value chemicals with an excellent control of selectivity and stereo-regularity. More recently, such catalysts have been implemented by polymer chemists to post-modify polymers in high yields, as well as to effectively catalyze reversible deactivation radical polymerizations and living polymerizations. These catalysts create new approaches for advanced organic transformation and polymer synthesis. The objective of this review is to give an overview of this emerging field to organic and polymer chemists as well as materials scientists.
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Affiliation(s)
- Nathaniel Corrigan
- Centre for Advanced Macromolecular Design (CAMD), School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia. and Australian Centre for NanoMedicine, School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | - Sivaprakash Shanmugam
- Centre for Advanced Macromolecular Design (CAMD), School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia.
| | - Jiangtao Xu
- Centre for Advanced Macromolecular Design (CAMD), School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia. and Australian Centre for NanoMedicine, School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design (CAMD), School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia. and Australian Centre for NanoMedicine, School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia
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24
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Nagaki A, Yamashita H, Takahashi Y, Ishiuchi S, Imai K, Yoshida JI. Selective Mono Addition of Aryllithiums to Dialdehydes by Micromixing. CHEM LETT 2018. [DOI: 10.1246/cl.170899] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Aiichiro Nagaki
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Hiroki Yamashita
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yusuke Takahashi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Satoshi Ishiuchi
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Keita Imai
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Jun-ichi Yoshida
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
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25
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Ichinari D, Nagaki A, Yoshida JI. Generation of hazardous methyl azide and its application to synthesis of a key-intermediate of picarbutrazox, a new potent pesticide in flow. Bioorg Med Chem 2017; 25:6224-6228. [DOI: 10.1016/j.bmc.2017.07.005] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 07/01/2017] [Accepted: 07/04/2017] [Indexed: 11/26/2022]
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26
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Shon JH, Teets TS. Potent Bis-Cyclometalated Iridium Photoreductants with β-Diketiminate Ancillary Ligands. Inorg Chem 2017; 56:15295-15303. [PMID: 29172506 DOI: 10.1021/acs.inorgchem.7b02859] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this work, we outline a strategy to prepare a class of improved visible-light photosensitizers. Bis-cyclometalated iridium complexes with electron-rich β-diketiminate (NacNac) ancillary ligands are demonstrated to be potent excited-state electron donors. Evaluation of the photophysical and electrochemical properties establishes the excited-state redox potentials of the complexes, and Stern-Volmer quenching experiments inform on the kinetics of photoinduced electron transfer to the model substrates methyl viologen (MV2+) and benzophenone (BP). Compared to fac-Ir(ppy)3 (ppy = 2-phenylpyridine), widely regarded as a state-of-the-art photoreductant, the complexes we describe have excited-state redox potentials that are more potent by 300-400 mV and rates for photoinduced electron transfer that are accelerated by as much as a factor of 3. These complexes emerge as promising targets for application in photocatalytic reactions and other photochemical processes.
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Affiliation(s)
- Jong-Hwa Shon
- Department of Chemistry, University of Houston , 3585 Cullen Blvd., Room 112, Houston, Texas 77204-5003, United States
| | - Thomas S Teets
- Department of Chemistry, University of Houston , 3585 Cullen Blvd., Room 112, Houston, Texas 77204-5003, United States
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27
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Coley CW, Abolhasani M, Lin H, Jensen KF. Material‐Efficient Microfluidic Platform for Exploratory Studies of Visible‐Light Photoredox Catalysis. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705148] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Connor W. Coley
- Department of Chemical Engineering Massachusetts Institute of Technology 77 Massachsuetts Avenue Cambridge MA 02139 USA
| | - Milad Abolhasani
- Department of Chemical Engineering Massachusetts Institute of Technology 77 Massachsuetts Avenue Cambridge MA 02139 USA
- Department of Chemical and Biomolecular Engineering North Carolina State University 911 Partners Way Raleigh NC 27695 USA
| | - Hongkun Lin
- Department of Chemical Engineering Massachusetts Institute of Technology 77 Massachsuetts Avenue Cambridge MA 02139 USA
| | - Klavs F. Jensen
- Department of Chemical Engineering Massachusetts Institute of Technology 77 Massachsuetts Avenue Cambridge MA 02139 USA
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28
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Coley CW, Abolhasani M, Lin H, Jensen KF. Material‐Efficient Microfluidic Platform for Exploratory Studies of Visible‐Light Photoredox Catalysis. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/anie.201705148] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Connor W. Coley
- Department of Chemical Engineering Massachusetts Institute of Technology 77 Massachsuetts Avenue Cambridge MA 02139 USA
| | - Milad Abolhasani
- Department of Chemical Engineering Massachusetts Institute of Technology 77 Massachsuetts Avenue Cambridge MA 02139 USA
- Department of Chemical and Biomolecular Engineering North Carolina State University 911 Partners Way Raleigh NC 27695 USA
| | - Hongkun Lin
- Department of Chemical Engineering Massachusetts Institute of Technology 77 Massachsuetts Avenue Cambridge MA 02139 USA
| | - Klavs F. Jensen
- Department of Chemical Engineering Massachusetts Institute of Technology 77 Massachsuetts Avenue Cambridge MA 02139 USA
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29
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Lee M, Neukirchen S, Cabrele C, Reiser O. Visible-light photoredox-catalyzed desulfurization of thiol- and disulfide-containing amino acids and small peptides. J Pept Sci 2017; 23:556-562. [DOI: 10.1002/psc.3016] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 05/11/2017] [Accepted: 05/12/2017] [Indexed: 01/09/2023]
Affiliation(s)
- Myungmo Lee
- Institute of Organic Chemistry; University of Regensburg; D-93053 Regensburg Germany
| | - Saskia Neukirchen
- Department of Molecular Biology; University of Salzburg; A-5020 Salzburg Austria
- Department of Chemistry and Biochemistry; Ruhr-University Bochum; Universitätsstrasse 150 44801 Bochum Germany
| | - Chiara Cabrele
- Department of Molecular Biology; University of Salzburg; A-5020 Salzburg Austria
| | - Oliver Reiser
- Institute of Organic Chemistry; University of Regensburg; D-93053 Regensburg Germany
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30
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Roslin S, Odell LR. Visible-Light Photocatalysis as an Enabling Tool for the Functionalization of Unactivated C(sp3
)-Substrates. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601479] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Sara Roslin
- Organic Pharmaceutical Chemistry; Department of Medicinal Chemistry, Uppsala Biomedical Center; Uppsala University; P. O. Box 574 75123 Uppsala Sweden
| | - Luke R. Odell
- Organic Pharmaceutical Chemistry; Department of Medicinal Chemistry, Uppsala Biomedical Center; Uppsala University; P. O. Box 574 75123 Uppsala Sweden
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31
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Roslin S, Odell LR. Palladium and visible-light mediated carbonylative Suzuki–Miyaura coupling of unactivated alkyl halides and aryl boronic acids. Chem Commun (Camb) 2017; 53:6895-6898. [DOI: 10.1039/c7cc02763j] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An efficient carbonylative coupling of aryl boronic acids and unactivated alkyl halides under visible-light irradiation and low CO-pressure is presented.
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Affiliation(s)
- Sara Roslin
- Organic Pharmaceutical Chemistry
- Department of Medicinal Chemistry
- Uppsala Biomedical Center
- Uppsala University
- Uppsala
| | - Luke R. Odell
- Organic Pharmaceutical Chemistry
- Department of Medicinal Chemistry
- Uppsala Biomedical Center
- Uppsala University
- Uppsala
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32
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Colmenares JC, Varma RS, Nair V. Selective photocatalysis of lignin-inspired chemicals by integrating hybrid nanocatalysis in microfluidic reactors. Chem Soc Rev 2017; 46:6675-6686. [DOI: 10.1039/c7cs00257b] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In an ideal symbiosis of nanophotocatalysis and microflow chemistry, this tutorial review delineates a micro-highway decorated with semiconductor-based photocatalytic thin layers for the selective transformations of lignin-based chemicals to high-value organic products.
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Affiliation(s)
| | - Rajender S. Varma
- Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacky University
- Olomouc
- Czech Republic
| | - Vaishakh Nair
- Institute of Physical Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
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33
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Nagaki A, Ishiuchi S, Imai K, Sasatsuki K, Nakahara Y, Yoshida JI. Micromixing enables chemoselective reactions of difunctional electrophiles with functional aryllithiums. REACT CHEM ENG 2017. [DOI: 10.1039/c7re00142h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Generation of highly unstable functional aryllithiums followed by chemoselective reactions with difunctional electrophiles were successfully achieved using flow microreactor systems equipped with micromixers to give highly functionalized compounds without protecting functional groups.
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Affiliation(s)
- Aiichiro Nagaki
- Department of Synthetic Chemistry and Biological Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Satoshi Ishiuchi
- Department of Synthetic Chemistry and Biological Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Keita Imai
- Department of Synthetic Chemistry and Biological Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Kengo Sasatsuki
- Department of Synthetic Chemistry and Biological Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
| | - Yuichi Nakahara
- Process Engineering Group
- Fundamental Technology Labs. Institute of Innovation
- Ajinomoto Co., Inc
- Kawasaki-ku
- Japan
| | - Jun-ichi Yoshida
- Department of Synthetic Chemistry and Biological Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615-8510
- Japan
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34
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Mizuno K, Nishiyama Y, Ogaki T, Terao K, Ikeda H, Kakiuchi K. Utilization of microflow reactors to carry out synthetically useful organic photochemical reactions. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C-PHOTOCHEMISTRY REVIEWS 2016. [DOI: 10.1016/j.jphotochemrev.2016.10.002] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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35
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Staveness D, Bosque I, Stephenson CRJ. Free Radical Chemistry Enabled by Visible Light-Induced Electron Transfer. Acc Chem Res 2016; 49:2295-2306. [PMID: 27529484 PMCID: PMC5127252 DOI: 10.1021/acs.accounts.6b00270] [Citation(s) in RCA: 415] [Impact Index Per Article: 51.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
![]()
Harnessing
visible light as the driving force
for chemical transformations generally offers a more environmentally
friendly alternative compared with classical synthetic methodology.
The transition metal-based photocatalysts commonly employed in photoredox
catalysis absorb efficiently in the visible spectrum, unlike most
organic substrates, allowing for orthogonal excitation. The subsequent
excited states are both more reducing and more oxidizing than the
ground state catalyst and are competitive with some of the more powerful
single-electron oxidants or reductants available to organic chemists
yet are simply accessed via irradiation. The benefits of this strategy
have proven particularly useful in radical chemistry, a field that
traditionally employs rather toxic and hazardous reagents to generate
the desired intermediates. In this Account, we discuss our efforts
to leverage visible light photoredox catalysis in radical-based bond-forming
and bond-cleaving events for which few, if any, environmentally benign
alternatives exist. Mechanistic investigations have driven our contributions
in this field, for both facilitating desired transformations and offering
new, unexpected opportunities. In fact, our total synthesis of (+)-gliocladin
C was only possible upon elucidating the propensity for various trialkylamine
additives to elicit a dual behavior as both a reductive quencher and
a H-atom donor. Importantly, while natural product synthesis was central
to our initial motivations to explore these photochemical processes,
we have since demonstrated applicability within other subfields of
chemistry, and our evaluation of flow technologies demonstrates the
potential to translate these results from the bench to pilot scale. Our forays into photoredox catalysis began with fundamental methodology,
providing a tin-free reductive dehalogenation that exchanged the gamut
of hazardous reagents previously employed for such a transformation
for visible light-mediated, ambient temperature conditions. Evolving
from this work, a new avenue toward atom transfer radical addition
(ATRA) chemistry was developed, enabling dual functionalization of
both double and triple bonds. Importantly, we have also expanded our
portfolio to target clinically relevant scaffolds. Photoredox catalysis
proved effective in generating high value fluorinated alkyl radicals
through the use of abundantly available starting materials, providing
access to libraries of trifluoromethylated (hetero)arenes as well
as intriguing gem-difluoro benzyl motifs via a novel
photochemical radical Smiles rearrangement. Finally, we discuss a
photochemical strategy toward sustainable lignin processing through
selective C–O bond cleavage methodology. The collection of
these efforts is meant to highlight the potential for visible light-mediated
radical chemistry to impact a variety of industrial sectors.
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Affiliation(s)
- Daryl Staveness
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Irene Bosque
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Corey R. J. Stephenson
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
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36
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Chowdhury S, Standaert RF. Deoxygenation of Unhindered Alcohols via Reductive Dealkylation of Derived Phosphate Esters. J Org Chem 2016; 81:9957-9963. [DOI: 10.1021/acs.joc.6b01699] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sarwat Chowdhury
- Department
of Chemistry, The University of Illinois at Chicago, 845 West
Taylor Street, Chicago, Illinois 60304, United States
| | - Robert F. Standaert
- Biosciences
Division, Oak Ridge National Laboratory, PO Box 2008, Oak Ridge, Tennessee 37831-6445, United States
- Department of Biochemistry and Cellular & Molecular Biology, University of Tennessee, Knoxville, Tennessee 37996, United States
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37
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Kärkäs M, Porco JA, Stephenson CRJ. Photochemical Approaches to Complex Chemotypes: Applications in Natural Product Synthesis. Chem Rev 2016; 116:9683-747. [PMID: 27120289 PMCID: PMC5025835 DOI: 10.1021/acs.chemrev.5b00760] [Citation(s) in RCA: 665] [Impact Index Per Article: 83.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2015] [Indexed: 01/29/2023]
Abstract
The use of photochemical transformations is a powerful strategy that allows for the formation of a high degree of molecular complexity from relatively simple building blocks in a single step. A central feature of all light-promoted transformations is the involvement of electronically excited states, generated upon absorption of photons. This produces transient reactive intermediates and significantly alters the reactivity of a chemical compound. The input of energy provided by light thus offers a means to produce strained and unique target compounds that cannot be assembled using thermal protocols. This review aims at highlighting photochemical transformations as a tool for rapidly accessing structurally and stereochemically diverse scaffolds. Synthetic designs based on photochemical transformations have the potential to afford complex polycyclic carbon skeletons with impressive efficiency, which are of high value in total synthesis.
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Affiliation(s)
- Markus
D. Kärkäs
- Department
of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - John A. Porco
- Department
of Chemistry, Center for Molecular Discovery (BU-CMD), Boston University, 590 Commonwealth Avenue, Boston, Massachusetts 02215, United States
| | - Corey R. J. Stephenson
- Department
of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
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38
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Chen W, Liu Z, Tian J, Li J, Ma J, Cheng X, Li G. Building Congested Ketone: Substituted Hantzsch Ester and Nitrile as Alkylation Reagents in Photoredox Catalysis. J Am Chem Soc 2016; 138:12312-5. [DOI: 10.1021/jacs.6b06379] [Citation(s) in RCA: 129] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Wenxin Chen
- Institute
of Chemistry and Biomedical Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing, China
| | - Zheng Liu
- Institute
of Chemistry and Biomedical Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing, China
| | - Jiaqi Tian
- Key
Laboratory of Mesoscopic Chemistry of MOE, Collaborative Innovation
Center of Chemistry for Life Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing, China
| | - Jin Li
- Institute
of Chemistry and Biomedical Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing, China
| | - Jing Ma
- Key
Laboratory of Mesoscopic Chemistry of MOE, Collaborative Innovation
Center of Chemistry for Life Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing, China
| | - Xu Cheng
- Institute
of Chemistry and Biomedical Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing, China
| | - Guigen Li
- Institute
of Chemistry and Biomedical Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing, China
- Department
of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
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39
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Tani Y, Takumi M, Moronaga S, Nagaki A, Yoshida JI. Flash cationic polymerization followed by bis-end-functionalization. A new approach to linear-dendritic hybrid polymers. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.02.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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40
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Wang K, Meng LG, Wang L. Visible-Light-Initiated Na2-Eosin Y Catalyzed Highly Regio- and Stereoselective Difunctionalization of Alkynes with Alkyl Bromides. J Org Chem 2016; 81:7080-7. [DOI: 10.1021/acs.joc.6b00973] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kuai Wang
- Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, People’s Republic of China
| | - Ling-Guo Meng
- Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, People’s Republic of China
| | - Lei Wang
- Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, People’s Republic of China
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41
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Nagaki A, Nakahara Y, Furusawa M, Sawaki T, Yamamoto T, Toukairin H, Tadokoro S, Shimazaki T, Ito T, Otake M, Arai H, Toda N, Ohtsuka K, Takahashi Y, Moriwaki Y, Tsuchihashi Y, Hirose K, Yoshida JI. Feasibility Study on Continuous Flow Controlled/Living Anionic Polymerization Processes. Org Process Res Dev 2016. [DOI: 10.1021/acs.oprd.6b00158] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Aiichiro Nagaki
- Department
of Synthetic Chemistry and Biological Chemistry, Graduate School of
Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Micro
Chemical Production Study Consortium in Kyoto University, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yuichi Nakahara
- Micro
Chemical Production Study Consortium in Kyoto University, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Process Engineering
Group, Fundamental Technology Laboratories, Institute
of Innovation, Ajinomoto Co., Inc., 1-1 Suzuki-cho, Kawasaki-ku, Kanagawa 210-8681, Japan
| | - Mai Furusawa
- Micro
Chemical Production Study Consortium in Kyoto University, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Oppama
Research Laboratory, Toho Chemical Industry Co., Ltd., 5-2931, Urago-cho, Yokosuka-shi, Kanagawa 237-0062, Japan
| | - Tomoya Sawaki
- Micro
Chemical Production Study Consortium in Kyoto University, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Iwata
Factory, Takasago International Corporation, Ebitsuka, Iwata City, Shizuoka 438-0812, Japan
| | - Tetsuya Yamamoto
- Micro
Chemical Production Study Consortium in Kyoto University, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Iwata
Factory, Takasago International Corporation, Ebitsuka, Iwata City, Shizuoka 438-0812, Japan
| | - Hideaki Toukairin
- Micro
Chemical Production Study Consortium in Kyoto University, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Iwata
Factory, Takasago International Corporation, Ebitsuka, Iwata City, Shizuoka 438-0812, Japan
| | - Shinsuke Tadokoro
- Micro
Chemical Production Study Consortium in Kyoto University, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Chemical
Research Laboratory, Nissan Chemical Industries, Ltd., 2-10-1, Tsuboi-nishi, Funabashi, Chiba 274-8507, Japan
| | - Toshiya Shimazaki
- Micro
Chemical Production Study Consortium in Kyoto University, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Tacmina Co. 2-2-14 Awajimachi, Chuo-ku, Osaka 541-0047, Japan
| | - Toshihide Ito
- Micro
Chemical Production Study Consortium in Kyoto University, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Tacmina Co. 2-2-14 Awajimachi, Chuo-ku, Osaka 541-0047, Japan
| | - Masakazu Otake
- Micro
Chemical Production Study Consortium in Kyoto University, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Tacmina Co. 2-2-14 Awajimachi, Chuo-ku, Osaka 541-0047, Japan
| | - Hidenori Arai
- Micro
Chemical Production Study Consortium in Kyoto University, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Tacmina Co. 2-2-14 Awajimachi, Chuo-ku, Osaka 541-0047, Japan
| | - Naoya Toda
- Micro
Chemical Production Study Consortium in Kyoto University, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Tacmina Co. 2-2-14 Awajimachi, Chuo-ku, Osaka 541-0047, Japan
| | - Keita Ohtsuka
- Micro
Chemical Production Study Consortium in Kyoto University, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Sankoh Seiki Kougyou Co., Ltd., 2-7-2, Keihinjima, Ota-ku, Tokyo 143-0003, Japan
| | - Yusuke Takahashi
- Department
of Synthetic Chemistry and Biological Chemistry, Graduate School of
Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yuya Moriwaki
- Department
of Synthetic Chemistry and Biological Chemistry, Graduate School of
Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yuta Tsuchihashi
- Department
of Synthetic Chemistry and Biological Chemistry, Graduate School of
Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Katsuyuki Hirose
- Department
of Synthetic Chemistry and Biological Chemistry, Graduate School of
Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Jun-ichi Yoshida
- Department
of Synthetic Chemistry and Biological Chemistry, Graduate School of
Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
- Micro
Chemical Production Study Consortium in Kyoto University, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
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42
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Chen W, Tao H, Huang W, Wang G, Li S, Cheng X, Li G. Hantzsch Ester as a Photosensitizer for the Visible-Light-Induced Debromination of Vicinal Dibromo Compounds. Chemistry 2016; 22:9546-50. [PMID: 27128783 DOI: 10.1002/chem.201601819] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Indexed: 11/11/2022]
Abstract
The debromination of vicinal dibromo compounds to generate alkenes usually requires harsh reaction conditions and the addition of catalysts. Just recently the visible-light-induced debromination of vicinal dibromo compounds emerged as a possible alternative to commonly used methods, but the substrate scope of this reaction is limited and a photocatalyst is necessary for the successful conversion of the starting compounds. A catalyst-free visible-light-induced debromination of vicinal dibromo compounds with a base-activated Hantzsch ester as photosensitizer is reported. The method has a wide substrate scope and a broad functional-group compatibility.
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Affiliation(s)
- Wenxin Chen
- Institute of Chemistry and Biomedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Xianlin Road, 163, Nanjing, China
| | - Huachen Tao
- Institute of Chemistry and Biomedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Xianlin Road, 163, Nanjing, China
| | - Wenhao Huang
- Institute of Chemistry and Biomedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Xianlin Road, 163, Nanjing, China
| | - Guoqiang Wang
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Hankou Road, 22, Nanjing, China
| | - Shuhua Li
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Hankou Road, 22, Nanjing, China.
| | - Xu Cheng
- Institute of Chemistry and Biomedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Xianlin Road, 163, Nanjing, China.
| | - Guigen Li
- Institute of Chemistry and Biomedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Xianlin Road, 163, Nanjing, China.,Department of Chemistry and Biochemistry, Texas Tech University, Memorial Circle & Boston, TX 79409-1061, Lubbock, United States
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43
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Cambié D, Bottecchia C, Straathof NJW, Hessel V, Noël T. Applications of Continuous-Flow Photochemistry in Organic Synthesis, Material Science, and Water Treatment. Chem Rev 2016; 116:10276-341. [PMID: 26935706 DOI: 10.1021/acs.chemrev.5b00707] [Citation(s) in RCA: 875] [Impact Index Per Article: 109.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Continuous-flow photochemistry in microreactors receives a lot of attention from researchers in academia and industry as this technology provides reduced reaction times, higher selectivities, straightforward scalability, and the possibility to safely use hazardous intermediates and gaseous reactants. In this review, an up-to-date overview is given of photochemical transformations in continuous-flow reactors, including applications in organic synthesis, material science, and water treatment. In addition, the advantages of continuous-flow photochemistry are pointed out and a thorough comparison with batch processing is presented.
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Affiliation(s)
- Dario Cambié
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry and Process Technology, Eindhoven University of Technology , Den Dolech 2, 5600 MB Eindhoven, The Netherlands
| | - Cecilia Bottecchia
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry and Process Technology, Eindhoven University of Technology , Den Dolech 2, 5600 MB Eindhoven, The Netherlands
| | - Natan J W Straathof
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry and Process Technology, Eindhoven University of Technology , Den Dolech 2, 5600 MB Eindhoven, The Netherlands
| | - Volker Hessel
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry and Process Technology, Eindhoven University of Technology , Den Dolech 2, 5600 MB Eindhoven, The Netherlands
| | - Timothy Noël
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry and Process Technology, Eindhoven University of Technology , Den Dolech 2, 5600 MB Eindhoven, The Netherlands.,Department of Organic Chemistry, Ghent University , Krijgslaan 281 (S4), 9000 Ghent, Belgium
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44
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Nagaki A, Hirose K, Tonomura O, Taniguchi S, Taga T, Hasebe S, Ishizuka N, Yoshida JI. Design of a Numbering-up System of Monolithic Microreactors and Its Application to Synthesis of a Key Intermediate of Valsartan. Org Process Res Dev 2016. [DOI: 10.1021/acs.oprd.5b00414] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aiichiro Nagaki
- Department
of Synthetic Chemistry and Biological Chemistry, Graduate School of
Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Katsuyuki Hirose
- Department
of Synthetic Chemistry and Biological Chemistry, Graduate School of
Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Osamu Tonomura
- Department
of Chemical Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Satoshi Taniguchi
- Department
of Chemical Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Toshiki Taga
- Department
of Chemical Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Shinji Hasebe
- Department
of Chemical Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Norio Ishizuka
- Emaus Kyoto Inc. R&D, 26 Nishida-cho, Saiin, Ukyo-ku, Kyoto 615-0055, Japan
| | - Jun-ichi Yoshida
- Department
of Synthetic Chemistry and Biological Chemistry, Graduate School of
Engineering, Kyoto University, Nishikyo-ku, Kyoto 615-8510, Japan
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45
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Wang J, Nguyen TH, Zheng N. Photoredox-catalyzed [4+2] annulation of cyclobutylanilines with alkenes, alkynes, and diynes in continuous flow. Sci China Chem 2016. [DOI: 10.1007/s11426-015-5547-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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46
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Zhang H, Liu PF, Chen Q, Wu QY, Seville A, Gu YC, Clough J, Zhou SL, Yang GF. Synthesis and absolute configuration assignment of albucidin: a late-stage reductive deiodination by visible light photocatalysis. Org Biomol Chem 2016; 14:3482-5. [DOI: 10.1039/c6ob00371k] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The total synthesis and absolute configuration assignment of albucidin might pave the way for synthetic and medicinal chemists for further research on this type of bioactive molecule.
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Affiliation(s)
- Hu Zhang
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education College of Chemistry
- Central China Normal University
- Wuhan
- China
| | - Peng-Fei Liu
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education College of Chemistry
- Central China Normal University
- Wuhan
- China
| | - Qiong Chen
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education College of Chemistry
- Central China Normal University
- Wuhan
- China
| | - Qiong-You Wu
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education College of Chemistry
- Central China Normal University
- Wuhan
- China
| | - Anne Seville
- Syngenta Jealott's Hill International Research Centre
- Bracknell
- UK
| | - Yu-Cheng Gu
- Syngenta Jealott's Hill International Research Centre
- Bracknell
- UK
| | - John Clough
- Syngenta Jealott's Hill International Research Centre
- Bracknell
- UK
| | - Shao-Lin Zhou
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education College of Chemistry
- Central China Normal University
- Wuhan
- China
| | - Guang-Fu Yang
- Key Laboratory of Pesticide & Chemical Biology
- Ministry of Education College of Chemistry
- Central China Normal University
- Wuhan
- China
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47
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Nagaki A, Hirose K, Moriwaki Y, Mitamura K, Matsukawa K, Ishizuka N, Yoshida J. Integration of borylation of aryllithiums and Suzuki–Miyaura coupling using monolithic Pd catalyst. Catal Sci Technol 2016. [DOI: 10.1039/c5cy02098k] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Integration of the preparation of arylboronic esters and Suzuki–Miyaura coupling using monolithic Pd catalyst was successfully achieved.
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Affiliation(s)
- A. Nagaki
- Department of Synthetic Chemistry and Biological Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615–8510
- Japan
| | - K. Hirose
- Department of Synthetic Chemistry and Biological Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615–8510
- Japan
| | - Y. Moriwaki
- Department of Synthetic Chemistry and Biological Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615–8510
- Japan
| | - K. Mitamura
- Emaus Kyoto Inc. R&Ds
- Ukyo-ku, Kyoto 615–0055
- Japan
| | - K. Matsukawa
- Emaus Kyoto Inc. R&Ds
- Ukyo-ku, Kyoto 615–0055
- Japan
| | - N. Ishizuka
- Osaka Municipal Technical Research Institute
- Electronic Material Research Division
- Osaka 536–8553
- Japan
| | - J. Yoshida
- Department of Synthetic Chemistry and Biological Chemistry
- Graduate School of Engineering
- Kyoto University
- Kyoto 615–8510
- Japan
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48
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Nagaki A, Kim S, Miuchi N, Yamashita H, Hirose K, Yoshida J. Switching between intermolecular and intramolecular reactions using flow microreactors: lithiation of 2-bromo-2′-silylbiphenyls. Org Chem Front 2016. [DOI: 10.1039/c6qo00257a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Switching between the intermolecular reaction and the intramolecular reaction was achieved at will using flow microreactors.
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Affiliation(s)
- A. Nagaki
- Department of Synthetic Chemistry and Biological Chemistry
- Graduate School of Engineering
- Kyoto University
- Nishikyo-ku
- Japan
| | - S. Kim
- Department of Synthetic Chemistry and Biological Chemistry
- Graduate School of Engineering
- Kyoto University
- Nishikyo-ku
- Japan
| | - N. Miuchi
- Department of Synthetic Chemistry and Biological Chemistry
- Graduate School of Engineering
- Kyoto University
- Nishikyo-ku
- Japan
| | - H. Yamashita
- Department of Synthetic Chemistry and Biological Chemistry
- Graduate School of Engineering
- Kyoto University
- Nishikyo-ku
- Japan
| | - K. Hirose
- Department of Synthetic Chemistry and Biological Chemistry
- Graduate School of Engineering
- Kyoto University
- Nishikyo-ku
- Japan
| | - J. Yoshida
- Department of Synthetic Chemistry and Biological Chemistry
- Graduate School of Engineering
- Kyoto University
- Nishikyo-ku
- Japan
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49
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Bonassi F, Ravelli D, Protti S, Fagnoni M. Decatungstate Photocatalyzed Acylations and Alkylations in Flow viaHydrogen Atom Transfer. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500483] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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50
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Speckmeier E, Padié C, Zeitler K. Visible Light Mediated Reductive Cleavage of C–O Bonds Accessing α-Substituted Aryl Ketones. Org Lett 2015; 17:4818-21. [DOI: 10.1021/acs.orglett.5b02378] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elisabeth Speckmeier
- Institut
für Organische Chemie, Universität Leipzig, Johannisallee
29, D-04103 Leipzig, Germany
| | - Clément Padié
- Institut
für Organische Chemie, Universität Regensburg, Universitätsstraße
31, D-93053 Regensburg, Germany
| | - Kirsten Zeitler
- Institut
für Organische Chemie, Universität Leipzig, Johannisallee
29, D-04103 Leipzig, Germany
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