51
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Sherwood TC, Xiao HY, Bhaskar RG, Simmons EM, Zaretsky S, Rauch MP, Knowles RR, Dhar TGM. Decarboxylative Intramolecular Arene Alkylation Using N-(Acyloxy)phthalimides, an Organic Photocatalyst, and Visible Light. J Org Chem 2019; 84:8360-8379. [DOI: 10.1021/acs.joc.9b00432] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Trevor C. Sherwood
- Research and Development, Bristol-Myers Squibb Company, P.O. Box 4000, Princeton, New Jersey 08543-4000, United States
| | - Hai-Yun Xiao
- Research and Development, Bristol-Myers Squibb Company, P.O. Box 4000, Princeton, New Jersey 08543-4000, United States
| | - Roshan G. Bhaskar
- Research and Development, Bristol-Myers Squibb Company, P.O. Box 4000, Princeton, New Jersey 08543-4000, United States
| | - Eric M. Simmons
- Chemical and Synthetic Development, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Serge Zaretsky
- Chemical and Synthetic Development, Bristol-Myers Squibb, 1 Squibb Drive, New Brunswick, New Jersey 08903, United States
| | - Martin P. Rauch
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Robert R. Knowles
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - T. G. Murali Dhar
- Research and Development, Bristol-Myers Squibb Company, P.O. Box 4000, Princeton, New Jersey 08543-4000, United States
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52
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Vill R, Gülcher J, Khalatur P, Wintergerst P, Stoll A, Mourran A, Ziener U. Supramolecular polymerization: challenges and advantages of various methods in assessing the aggregation mechanism. NANOSCALE 2019; 11:663-674. [PMID: 30565631 DOI: 10.1039/c8nr08472f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Oligothiophenes with branched alkyl end groups show distinct aggregation in organic solvents. The process of supramolecular polymerization is assessed by three different methods (UV-vis absorption and fluorescence emission spectroscopy and dynamic light scattering) to exclude artifacts. An apparent dependence of the degree of aggregation on the concentration of the oligomers is observed. Above the upper limit of concentration (a lower micromolar range for the present class of compounds), experimental data delivered conflicting results and the concentration should not therefore be exceeded. Scanning force microscopy and molecular dynamics simulations confirm the formation of one-dimensional aggregates with presumably helical arrangement of the achiral monomers.
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Affiliation(s)
- Roman Vill
- Institute of Organic Chemistry III-Macromolecular Chemistry and Organic Materials, University of Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany.
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53
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Iqbal N, Iqbal N, Han SS, Cho EJ. Synthesis of fluoroalkylated alkynes via visible-light photocatalysis. Org Biomol Chem 2019; 17:1758-1762. [DOI: 10.1039/c8ob02486c] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Fluoroalkylated alkynes, which are versatile building blocks for the synthesis of various biologically active organofluorine compounds, were synthesized from easily available alkynyl halides and fluoroalkyl halides by visible-light photocatalysis.
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Affiliation(s)
- Naila Iqbal
- Department of Chemistry
- Chung-Ang University
- Seoul 06974
- Republic of Korea
| | - Naeem Iqbal
- Department of Chemistry
- Chung-Ang University
- Seoul 06974
- Republic of Korea
| | - Sung Su Han
- Department of Chemistry
- Chung-Ang University
- Seoul 06974
- Republic of Korea
| | - Eun Jin Cho
- Department of Chemistry
- Chung-Ang University
- Seoul 06974
- Republic of Korea
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54
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Liu Y, Xue L, Shi B, Bu F, Wang D, Lu L, Shi R, Lei A. Catalyst-free electrochemical decarboxylative cross-coupling of N-hydroxyphthalimide esters and N-heteroarenes towards C(sp3)–C(sp2) bond formation. Chem Commun (Camb) 2019; 55:14922-14925. [DOI: 10.1039/c9cc08528a] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We formed C(sp3)–C(sp2) bonds under electrochemical conditions by using NHP esters and N-heteroarenes without any catalysts. Our approach could be a complement to the Kolbe reaction and a promising strategy for finding more new reactions.
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Affiliation(s)
- Yichang Liu
- Institute for Advanced Studies (IAS)
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Liwei Xue
- Institute for Advanced Studies (IAS)
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Biyin Shi
- Institute for Advanced Studies (IAS)
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Faxiang Bu
- Institute for Advanced Studies (IAS)
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Dan Wang
- Institute for Advanced Studies (IAS)
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Lijun Lu
- Institute for Advanced Studies (IAS)
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Renyi Shi
- Institute for Advanced Studies (IAS)
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
| | - Aiwen Lei
- Institute for Advanced Studies (IAS)
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan 430072
- P. R. China
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55
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Laudadio G, de Smet W, Struik L, Cao Y, Noël T. Design and application of a modular and scalable electrochemical flow microreactor. J Flow Chem 2018; 8:157-165. [PMID: 30931153 PMCID: PMC6404740 DOI: 10.1007/s41981-018-0024-3] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 11/14/2018] [Indexed: 12/27/2022]
Abstract
Electrochemistry constitutes a mild, green and versatile activation method of organic molecules. Despite these innate advantages, its widespread use in organic chemistry has been hampered due to technical limitations, such as mass and heat transfer limitations which restraints the scalability of electrochemical methods. Herein, we describe an undivided-cell electrochemical flow reactor with a flexible reactor volume. This enables its use in two different modes, which are highly relevant for flow chemistry applications, including a serial (volume ranging from 88 μL/channel up to 704 μL) or a parallel mode (numbering-up). The electrochemical flow reactor was subsequently assessed in two synthetic transformations, which confirms its versatility and scale-up potential.
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Affiliation(s)
- Gabriele Laudadio
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry & Synthetic Methodology, Eindhoven University of Technology, De Rondom 70 (Helix, STO 1.37), 5612 AP Eindhoven, The Netherlands
| | - Wouter de Smet
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry & Synthetic Methodology, Eindhoven University of Technology, De Rondom 70 (Helix, STO 1.37), 5612 AP Eindhoven, The Netherlands
| | - Lisa Struik
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry & Synthetic Methodology, Eindhoven University of Technology, De Rondom 70 (Helix, STO 1.37), 5612 AP Eindhoven, The Netherlands
| | - Yiran Cao
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry & Synthetic Methodology, Eindhoven University of Technology, De Rondom 70 (Helix, STO 1.37), 5612 AP Eindhoven, The Netherlands
| | - Timothy Noël
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry & Synthetic Methodology, Eindhoven University of Technology, De Rondom 70 (Helix, STO 1.37), 5612 AP Eindhoven, The Netherlands
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56
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Im H, Kang D, Choi S, Shin S, Hong S. Visible-Light-Induced C–O Bond Formation for the Construction of Five- and Six-Membered Cyclic Ethers and Lactones. Org Lett 2018; 20:7437-7441. [DOI: 10.1021/acs.orglett.8b03166] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Honggu Im
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Korea
| | - Dahye Kang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Korea
| | - Soyeon Choi
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Korea
| | - Sanghoon Shin
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Korea
| | - Sungwoo Hong
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Korea
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57
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Politano F, Oksdath-Mansilla G. Light on the Horizon: Current Research and Future Perspectives in Flow Photochemistry. Org Process Res Dev 2018. [DOI: 10.1021/acs.oprd.8b00213] [Citation(s) in RCA: 106] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Fabrizio Politano
- INFIQC-CONICET-UNC, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Argentina
| | - Gabriela Oksdath-Mansilla
- INFIQC-CONICET-UNC, Departamento de Química Orgánica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Argentina
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58
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Kuijpers KPL, Bottecchia C, Cambié D, Drummen K, König NJ, Noël T. A Fully Automated Continuous-Flow Platform for Fluorescence Quenching Studies and Stern-Volmer Analysis. Angew Chem Int Ed Engl 2018; 57:11278-11282. [PMID: 29992682 PMCID: PMC6120497 DOI: 10.1002/anie.201805632] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Indexed: 11/09/2022]
Abstract
Herein, we report the first fully automated continuous‐flow platform for fluorescence quenching studies and Stern–Volmer analysis. All the components of the platform were automated and controlled by a self‐written Python script. A user‐friendly software allows even inexperienced operators to perform automated screening of novel quenchers or Stern–Volmer analysis, thus accelerating and facilitating both reaction discovery and mechanistic studies. The operational simplicity of our system affords a time and labor reduction over batch methods while increasing the accuracy and reproducibility of the data produced. Finally, the applicability of our platform is elucidated through relevant case studies.
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Affiliation(s)
- Koen P L Kuijpers
- Department of Chemical Engineering and Chemistry, Sustainable Process Engineering, Micro Flow Chemistry & Process Technology, Eindhoven University of Technology, Den Dolech 2, 5612, AZ, Eindhoven, The Netherlands
| | - Cecilia Bottecchia
- Department of Chemical Engineering and Chemistry, Sustainable Process Engineering, Micro Flow Chemistry & Process Technology, Eindhoven University of Technology, Den Dolech 2, 5612, AZ, Eindhoven, The Netherlands
| | - Dario Cambié
- Department of Chemical Engineering and Chemistry, Sustainable Process Engineering, Micro Flow Chemistry & Process Technology, Eindhoven University of Technology, Den Dolech 2, 5612, AZ, Eindhoven, The Netherlands
| | - Koen Drummen
- Department of Chemical Engineering and Chemistry, Sustainable Process Engineering, Micro Flow Chemistry & Process Technology, Eindhoven University of Technology, Den Dolech 2, 5612, AZ, Eindhoven, The Netherlands
| | - Niels J König
- Department of Chemical Engineering and Chemistry, Sustainable Process Engineering, Micro Flow Chemistry & Process Technology, Eindhoven University of Technology, Den Dolech 2, 5612, AZ, Eindhoven, The Netherlands
| | - Timothy Noël
- Department of Chemical Engineering and Chemistry, Sustainable Process Engineering, Micro Flow Chemistry & Process Technology, Eindhoven University of Technology, Den Dolech 2, 5612, AZ, Eindhoven, The Netherlands
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