1
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The applications of organozinc reagents in continuous flow chemistry: Negishi coupling. J Flow Chem 2023. [DOI: 10.1007/s41981-022-00253-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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2
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Kim DP, Sharma BM, Nikam AV, Lahore S, Ahn GN. Cyanide-Free Cyanation of sp2 and sp-Carbons by Oxazole based Masked CN Source Using Flow Microreactors. Chemistry 2021; 28:e202103777. [PMID: 34963029 DOI: 10.1002/chem.202103777] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Indexed: 11/10/2022]
Abstract
We herein report a cyanide-free continuous-flow process for cyanation of sp 2 and sp carbons to synthesize aryl, vinyl and acetylenic nitriles from (5-methyl-2-phenyloxazol-4-yl) boronic acid [OxBA] reagent as a sole source of carbon-bound masked -CN source. Non-toxic and stable OxBA reagent is generated by lithiation-borylation of bromo-oxazole, and the consecutive Suzuki-Miyaura cross-coupling with aryl, vinyl, or acetylenic halides and demasking [4 + 2]/retro-[4 + 2] sequence were successfully accomplished to give the desired cyano compounds with reasonably good yields in a four-step flow manner. A unique feature of this cyanation protocol in flow enables to cyanate a variety of sp 2 and sp carbons to produce a broad spectrum of aryl acetonitrile. It is envisaged that the OxBA based cyanation would replace existing unstable and toxic approaches as well as non-toxic cyanation using two different sources of "C" and "N" to incorporate the -CN group.
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Affiliation(s)
- Dong-Pyo Kim
- Pohang University of Science and Technology, chemical engineering, san 31, Hyoja-dong, Nam-gu, 790-784, Pohang, KOREA, REPUBLIC OF
| | - Brijesh M Sharma
- Pohang Gonggwa Daehakgyo Sinsojae Gonghakgwa: Pohang University of Science and Technology Department of Materials Science and Engineering, Department of Chemical Engineering, KOREA, REPUBLIC OF
| | - Arun V Nikam
- Pohang Gonggwa Daehakgyo Sinsojae Gonghakgwa: Pohang University of Science and Technology Department of Materials Science and Engineering, Department of Chemical Engineering, KOREA, REPUBLIC OF
| | - Santosh Lahore
- Pohang Gonggwa Daehakgyo Sinsojae Gonghakgwa: Pohang University of Science and Technology Department of Materials Science and Engineering, Department of Chemical Engineering, KOREA, REPUBLIC OF
| | - Gwang-Noh Ahn
- Pohang Gonggwa Daehakgyo Sinsojae Gonghakgwa: Pohang University of Science and Technology Department of Materials Science and Engineering, Department of Chemical Engineering, KOREA, REPUBLIC OF
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3
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Inoue K, Feng Y, Mori A, Okano K. "Snapshot" Trapping of Multiple Transient Azolyllithiums in Batch. Chemistry 2021; 27:10267-10273. [PMID: 33960030 DOI: 10.1002/chem.202101256] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Indexed: 12/23/2022]
Abstract
Recent developments in flow microreactor technology have allowed the use of transient organolithium compounds that cannot be realized in a batch reactor. However, trapping the transient aryllithiums in a "halogen dance" is still challenging. Herein is reported the trapping of such short-lived azolyllithiums in a batch reactor by developing a finely tuned in situ zincation using zinc halide diamine complexes. The reaction rate is controlled by the appropriate choice of diamine ligand. The reaction is operationally simple and can be performed at 0 °C with high reproducibility on a multigram scale. This method was applicable to a wide range of brominated azoles allowing deprotonative functionalization, which was used for the concise divergent syntheses of both constitutional isomers of biologically active azoles.
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Affiliation(s)
- Kengo Inoue
- Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe, 657-8501, Japan
| | - Yuxuan Feng
- Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe, 657-8501, Japan
| | - Atsunori Mori
- Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe, 657-8501, Japan.,Research Center for Membrane and Film Technology, Kobe University, 1-1 Rokkodai, Nada, Kobe, 657-8501, Japan
| | - Kentaro Okano
- Department of Chemical Science and Engineering, Kobe University, 1-1 Rokkodai, Nada, Kobe, 657-8501, Japan
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Wong JYF, Tobin JM, Vilela F, Barker G. Batch Versus Flow Lithiation–Substitution of 1,3,4‐Oxadiazoles: Exploitation of Unstable Intermediates Using Flow Chemistry. Chemistry 2019; 25:12439-12445. [DOI: 10.1002/chem.201902917] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 07/26/2019] [Indexed: 12/12/2022]
Affiliation(s)
- Jeff Y. F. Wong
- Institute of Chemical SciencesHeriot-Watt University Riccarton Edinburgh UK
| | - John M. Tobin
- Institute of Chemical SciencesHeriot-Watt University Riccarton Edinburgh UK
| | - Filipe Vilela
- Institute of Chemical SciencesHeriot-Watt University Riccarton Edinburgh UK
| | - Graeme Barker
- Institute of Chemical SciencesHeriot-Watt University Riccarton Edinburgh UK
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5
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Kandasamy M, Huang YH, Ganesan B, Senadi GC, Lin WY. In Situ Generation of Alkynylzinc and Its Subsequent Negishi Reaction in a Flow Reactor. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900471] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mohanraj Kandasamy
- Department of Medicinal and Applied Chemistry; Kaohsiung Medical University; 807 Kaohsiung Taiwan
| | - Yu- Hsuan Huang
- Department of Medicinal and Applied Chemistry; Kaohsiung Medical University; 807 Kaohsiung Taiwan
| | - Balaji Ganesan
- Department of Medicinal and Applied Chemistry; Kaohsiung Medical University; 807 Kaohsiung Taiwan
| | - Gopal Chandru Senadi
- Department of Chemistry; Faculty of Engineering and Technology; SRM Institute of Science and Technology; 603203 Kattankulathur Chennai India
| | - Wei-Yu Lin
- Department of Medicinal and Applied Chemistry; Kaohsiung Medical University; 807 Kaohsiung Taiwan
- Department of Medical Research; Kaohsiung Medical University Hospital; 807 Kaohsiung Taiwan
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6
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Sharma MK, Acharya RB, Shukla CA, Kulkarni AA. Assessing the possibilities of designing a unified multistep continuous flow synthesis platform. Beilstein J Org Chem 2018; 14:1917-1936. [PMID: 30112097 PMCID: PMC6071694 DOI: 10.3762/bjoc.14.166] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 06/22/2018] [Indexed: 01/20/2023] Open
Abstract
The multistep flow synthesis of complex molecules has gained momentum over the last few years. A wide range of reaction types and conditions have been integrated seamlessly on a single platform including in-line separation as well as monitoring. Beyond merely getting considered as 'flow version' of conventional 'one-pot synthesis', multistep flow synthesis has become the next generation tool for creating libraries of new molecules. Here we give a more 'engineering' look at the possibility of developing a 'unified multistep flow synthesis platform'. A detailed analysis of various scenarios is presented considering 4 different classes of drugs already reported in the literature. The possible complexities that an automated and controlled platform needs to handle are also discussed in detail. Three different design approaches are proposed: (i) one molecule at a time, (ii) many molecules at a time and (iii) cybernetic approach. Each approach would lead to the effortless integration of different synthesis stages and also at different synthesis scales. While one may expect such a platform to operate like a 'driverless car' or a 'robo chemist' or a 'transformer', in reality, such an envisaged system would be much more complex than these examples.
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Affiliation(s)
- Mrityunjay K Sharma
- Academy of Scientific and Innovative Research (AcSIR), CSIR-National Chemical Laboratory (NCL) Campus, Pune 411008, India
- Chem. Eng. & Proc. Dev. Div., CSIR-National Chemical Laboratory, Dr. Homi Bhaba Road, Pashan, Pune 411008, India
| | - Roopashri B Acharya
- Chem. Eng. & Proc. Dev. Div., CSIR-National Chemical Laboratory, Dr. Homi Bhaba Road, Pashan, Pune 411008, India
| | - Chinmay A Shukla
- Academy of Scientific and Innovative Research (AcSIR), CSIR-National Chemical Laboratory (NCL) Campus, Pune 411008, India
- Chem. Eng. & Proc. Dev. Div., CSIR-National Chemical Laboratory, Dr. Homi Bhaba Road, Pashan, Pune 411008, India
| | - Amol A Kulkarni
- Academy of Scientific and Innovative Research (AcSIR), CSIR-National Chemical Laboratory (NCL) Campus, Pune 411008, India
- Chem. Eng. & Proc. Dev. Div., CSIR-National Chemical Laboratory, Dr. Homi Bhaba Road, Pashan, Pune 411008, India
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7
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Advances in Enantioselective C–H Activation/Mizoroki-Heck Reaction and Suzuki Reaction. Catalysts 2018. [DOI: 10.3390/catal8020090] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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8
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Roesner S, Buchwald SL. Continuous-Flow Synthesis of Biaryls by Negishi Cross-Coupling of Fluoro- and Trifluoromethyl-Substituted (Hetero)arenes. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605584] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Stefan Roesner
- Department of Chemistry; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA
| | - Stephen L. Buchwald
- Department of Chemistry; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA
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9
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Roesner S, Buchwald SL. Continuous-Flow Synthesis of Biaryls by Negishi Cross-Coupling of Fluoro- and Trifluoromethyl-Substituted (Hetero)arenes. Angew Chem Int Ed Engl 2016; 55:10463-7. [PMID: 27456275 DOI: 10.1002/anie.201605584] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 06/17/2016] [Indexed: 01/22/2023]
Abstract
A continuous-flow method for the regioselective arylation of fluoroarenes and fluoropyridines has been developed. The telescoped procedure reported here consists of a three-step metalation, zincation, and Negishi cross-coupling sequence, providing efficient access to a variety of functionalized 2-fluorobiaryl products. Precise temperature control of the metalation step, made possible by continuous-flow technology, allowed for the efficient preparation of the arylated products in high yields and short residence times. Additionally, several examples of the regioselective arylation of benzotrifluoride derivatives are also provided.
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Affiliation(s)
- Stefan Roesner
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Stephen L Buchwald
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA.
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10
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Pascanu V, Hansen PR, Bermejo Gómez A, Ayats C, Platero-Prats AE, Johansson MJ, Pericàs MÀ, Martín-Matute B. Highly functionalized biaryls via Suzuki-Miyaura cross-coupling catalyzed by Pd@MOF under batch and continuous flow regimes. CHEMSUSCHEM 2015; 8:123-130. [PMID: 25421122 DOI: 10.1002/cssc.201402858] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Indexed: 06/04/2023]
Abstract
A diverse set of more than 40 highly functionalized biaryls was synthesized successfully through the Suzuki-Miyaura cross-coupling reaction catalyzed by Pd nanoparticles supported in a functionalized mesoporous MOF (8 wt % Pd@MIL-101(Cr)-NH2 ). This could be achieved under some of the mildest conditions reported to date and a strong control over the leaching of metallic species could be maintained, despite the presence of diverse functional groups and/or several heteroatoms. Some of the targeted molecules are important intermediates in the synthesis of pharmaceuticals and we clearly exemplify the versatility of this catalytic system, which affords better yields than currently existing commercial procedures. Most importantly, Pd@MIL-101-NH2 was packed in a micro-flow reactor, which represents the first report of metallic nanoparticles supported on MOFs employed in flow chemistry for catalytic applications. A small library of 11 isolated compounds was created in a continuous experiment without replacing the catalyst, demonstrating the potential of the catalyst for large-scale applications.
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Affiliation(s)
- Vlad Pascanu
- Department of Organic Chemistry and Berzelii Center EXSELENT, Arrhenius Laboratory, Stockholm University, Stockholm, 106 91 (Sweden)
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11
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Newby JA, Blaylock DW, Witt PM, Pastre JC, Zacharova MK, Ley SV, Browne DL. Design and Application of a Low-Temperature Continuous Flow Chemistry Platform. Org Process Res Dev 2014. [DOI: 10.1021/op500213j] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- James A. Newby
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | | | - Paul M. Witt
- Dow Chemical Company, Midland, Michigan 48674, United States
| | - Julio C. Pastre
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Marija K. Zacharova
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Steven V. Ley
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Duncan L. Browne
- Department
of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
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12
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Petersen TP, Becker MR, Knochel P. Continuous flow magnesiation of functionalized heterocycles and acrylates with TMPMgCl⋅LiCl. Angew Chem Int Ed Engl 2014; 53:7933-7. [PMID: 24962240 DOI: 10.1002/anie.201404221] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Indexed: 11/11/2022]
Abstract
A flow procedure for the metalation of functionalized heterocycles (pyridines, pyrimidines, thiophenes, and thiazoles) and various acrylates using the strong, non-nucleophilic base TMPMgCl⋅LiCl is reported. The flow conditions allow the magnesiations to be performed under more convenient conditions than the comparable batch reactions, which often require cryogenic temperatures and long reaction times. Moreover, the flow reactions are directly scalable without further optimization. Metalation under flow conditions also allows magnesiations that did not produce the desired products under batch conditions, such as the magnesiation of sensitive acrylic derivatives. The magnesiated species are subsequently quenched with various electrophiles, thereby introducing a broad range of functionalities.
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Affiliation(s)
- Trine P Petersen
- Ludwig-Maximilians-Universität München, Department Chemie Butenandtstrasse 5-13, Haus F, 81377 München (Germany)
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13
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Petersen TP, Becker MR, Knochel P. Magnesierung funktionalisierter Heterocyclen und Acrylate unter Verwendung von TMPMgCl⋅LiCl in kontinuierlichem Fluss. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201404221] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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14
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Zhang HH, Dong J, Hu QS. tBu 3P-Coordinated 2-Phenylaniline-Based Palladacycle Complex As Precatalyst for Pd-Catalyzed Coupling Reactions of Aryl Halides with Polyfluoroarenes via C-H Activation Strategy. European J Org Chem 2014; 2014:1327-1332. [PMID: 24778575 PMCID: PMC4000033 DOI: 10.1002/ejoc.201301272] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Indexed: 11/11/2022]
Abstract
tBu3P-Coordinated 2-phenylaniline-based palladacycle complex was demonstrated to be an efficient precatalyst for Pd-catalyzed coupling reactions of aryl halides with polyfluoroarenes via C-H activation strategy. The readily accessibility and easy handling nature of tBu3P- coordinated 2-aminobiphenyl-based palladacycle complex and the high yields of the reaction makes tBu3P-coordinated 2-aminobiphenyl-based palladacycle complex an attractive precatalyst for the cross-coupling reaction of aryl halides with polyfluoroarenes.
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Affiliation(s)
| | | | - Qiao-Sheng Hu
- Department of Chemistry, College of Staten Island and Graduate Center of the City University of New York, Staten Island, New York, 10314, United States
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15
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Investigation of a Lithium-Halogen Exchange Flow Process for the Preparation of Boronates by Using a Cryo-Flow Reactor. Chemistry 2013; 20:263-71. [DOI: 10.1002/chem.201303736] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Indexed: 11/07/2022]
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16
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Petersen TP, Mirsharghi S, Rummel PC, Thiele S, Rosenkilde MM, Ritzén A, Ulven T. Multistep Continuous-Flow Synthesis in Medicinal Chemistry: Discovery and Preliminary Structure-Activity Relationships of CCR8 Ligands. Chemistry 2013; 19:9343-50. [DOI: 10.1002/chem.201204350] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2012] [Revised: 04/02/2013] [Indexed: 11/07/2022]
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17
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Li P, Moore JS, Jensen KF. A Microfluidic System for the Continuous Recycling of Unmodified Homogeneous Palladium Catalysts through Liquid/Liquid Phase Separation. ChemCatChem 2013. [DOI: 10.1002/cctc.201300054] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Hessel V, Kralisch D, Kockmann N, Noël T, Wang Q. Novel process windows for enabling, accelerating, and uplifting flow chemistry. CHEMSUSCHEM 2013; 6:746-89. [PMID: 23606410 DOI: 10.1002/cssc.201200766] [Citation(s) in RCA: 349] [Impact Index Per Article: 31.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Indexed: 05/04/2023]
Abstract
Novel Process Windows make use of process conditions that are far from conventional practices. This involves the use of high temperatures, high pressures, high concentrations (solvent-free), new chemical transformations, explosive conditions, and process simplification and integration to boost synthetic chemistry on both the laboratory and production scale. Such harsh reaction conditions can be safely reached in microstructured reactors due to their excellent transport intensification properties. This Review discusses the different routes towards Novel Process Windows and provides several examples for each route grouped into different classes of chemical and process-design intensification.
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Affiliation(s)
- Volker Hessel
- Department of Chemical Engineering and Chemistry, Micro Flow Chemistry and Process Technology, Eindhoven University of Technology, PO BOX 513, 5600 MB Eindhoven, The Netherlands.
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de M. Muñoz J, Alcázar J, de la Hoz A, Díaz-Ortiz A. Cross-Coupling in Flow using Supported Catalysts: Mild, Clean, Efficient and Sustainable Suzuki-Miyaura Coupling in a Single Pass. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201200678] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Desai AA. Überwindung der Limitierungen für die Lithiierung von Organoborverbindungen durch kontinuierliche Prozessführung. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201203554] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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21
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Desai AA. Overcoming the Limitations of Lithiation Chemistry for Organoboron Compounds with Continuous Processing. Angew Chem Int Ed Engl 2012; 51:9223-5. [DOI: 10.1002/anie.201203554] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Revised: 06/02/2012] [Indexed: 11/08/2022]
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22
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Shu W, Buchwald SL. Enantioselective β-Arylation of Ketones Enabled by Lithiation/Borylation/1,4-Addition Sequence Under Flow Conditions. Angew Chem Int Ed Engl 2012; 51:5355-8. [DOI: 10.1002/anie.201202221] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2012] [Indexed: 11/08/2022]
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23
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Shu W, Buchwald SL. Enantioselective β-Arylation of Ketones Enabled by Lithiation/Borylation/1,4-Addition Sequence Under Flow Conditions. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201202221] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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