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Kuhwald C, Türkhan S, Kirschning A. Inductive heating and flow chemistry – a perfect synergy of emerging enabling technologies. Beilstein J Org Chem 2022; 18:688-706. [PMID: 35821695 PMCID: PMC9235909 DOI: 10.3762/bjoc.18.70] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 05/25/2022] [Indexed: 12/13/2022] Open
Abstract
Inductive heating has developed into a powerful and rapid indirect heating technique used in various fields of chemistry, but also in medicine. Traditionally, inductive heating is used in industry, e.g., for heating large metallic objects including bending, bonding, and welding pipes. In addition, inductive heating has emerged as a partner for flow chemistry, both of which are enabling technologies for organic synthesis. This report reviews the combination of flow chemistry and inductive heating in industrial settings as well as academic research and demonstrates that the two technologies ideally complement each other.
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Affiliation(s)
- Conrad Kuhwald
- Institute of Organic Chemistry, Leibniz University Hannover, Schneiderberg 1b, 30167 Hannover, Germany
| | - Sibel Türkhan
- Institute of Organic Chemistry, Leibniz University Hannover, Schneiderberg 1b, 30167 Hannover, Germany
| | - Andreas Kirschning
- Institute of Organic Chemistry, Leibniz University Hannover, Schneiderberg 1b, 30167 Hannover, Germany
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2
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Okuno Y, Shibata T, Ohyou A, Suzuki R, Takegami M, Kato S, Isomura S, Aoki S, Kanno J, Sato Y. Synthesis of Bi‐functional Immobilized Polymer Catalysts via a Two‐step Radiation‐induced Graft Polymerization Process. ChemCatChem 2020. [DOI: 10.1002/cctc.202001451] [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)
- Yoshinori Okuno
- Yokohama University of Pharmacy Department of Medicinal Chemistry 601 Matano-cho Totsuka-ku Yokohama 245-0066 Japan
| | - Takako Shibata
- Yokohama University of Pharmacy Department of Medicinal Chemistry 601 Matano-cho Totsuka-ku Yokohama 245-0066 Japan
| | - Akie Ohyou
- Yokohama University of Pharmacy Department of Medicinal Chemistry 601 Matano-cho Totsuka-ku Yokohama 245-0066 Japan
| | - Rie Suzuki
- Yokohama University of Pharmacy Department of Medicinal Chemistry 601 Matano-cho Totsuka-ku Yokohama 245-0066 Japan
| | - Mayuko Takegami
- Yokohama University of Pharmacy Department of Medicinal Chemistry 601 Matano-cho Totsuka-ku Yokohama 245-0066 Japan
| | - Satoshi Kato
- Yokohama University of Pharmacy Department of Medicinal Chemistry 601 Matano-cho Totsuka-ku Yokohama 245-0066 Japan
| | - Shigeki Isomura
- Yokohama University of Pharmacy Department of Medicinal Chemistry 601 Matano-cho Totsuka-ku Yokohama 245-0066 Japan
| | - Shoji Aoki
- ECE Co. Ltd. Technical Development Group 4-2-1 Honfujisawa Fujisawa 251-8502 Japan
| | - Junichi Kanno
- ECE Co. Ltd. Technical Development Group 4-2-1 Honfujisawa Fujisawa 251-8502 Japan
| | - Yasuo Sato
- Yokohama University of Pharmacy Department of Medicinal Chemistry 601 Matano-cho Totsuka-ku Yokohama 245-0066 Japan
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3
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Krištofíková D, Modrocká V, Mečiarová M, Šebesta R. Green Asymmetric Organocatalysis. CHEMSUSCHEM 2020; 13:2828-2858. [PMID: 32141177 DOI: 10.1002/cssc.202000137] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 03/05/2020] [Indexed: 06/10/2023]
Abstract
Asymmetric organocatalysis is becoming one of the main tools for the synthesis of chiral compounds that are needed as medicines, crop protection agents, and other bioactive molecules. It can be effectively combined with various green chemistry methodologies. Intensification techniques, such as ball milling, flow, high pressure, or light, bring not only higher yields, faster reactions, and easier product isolation, but also new reactivities. More sustainable reaction media, such as ionic liquids, deep eutectic solvents, green solvent alternatives, and water, also considerably enhance the sustainability profile of many organocatalytic reactions.
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Affiliation(s)
- Dominika Krištofíková
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynska dolina, Ilkovicova 6, 842 15, Bratislava, Slovakia
| | - Viktória Modrocká
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynska dolina, Ilkovicova 6, 842 15, Bratislava, Slovakia
| | - Mária Mečiarová
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynska dolina, Ilkovicova 6, 842 15, Bratislava, Slovakia
| | - Radovan Šebesta
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University in Bratislava, Mlynska dolina, Ilkovicova 6, 842 15, Bratislava, Slovakia
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4
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Sohail M, Tanaka F. Control of Chemical Reactions by Using Molecules that Buffer Non‐aqueous Solutions. Chemistry 2019; 26:222-229. [DOI: 10.1002/chem.201903552] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 10/17/2019] [Indexed: 01/23/2023]
Affiliation(s)
- Muhammad Sohail
- Chemistry and Chemical Bioengineering Unit Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha Onna Okinawa 904-0495 Japan
| | - Fujie Tanaka
- Chemistry and Chemical Bioengineering Unit Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha Onna Okinawa 904-0495 Japan
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5
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Warias R, Zaghi A, Heiland JJ, Piendl SK, Gilmore K, Seeberger PH, Massi A, Belder D. An Integrated Lab‐on‐a‐chip Approach to Study Heterogeneous Enantioselective Catalysts at the Microscale. ChemCatChem 2018. [DOI: 10.1002/cctc.201801637] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Rico Warias
- Institute of Analytical ChemistryLeipzig University Linnéstraße 03 Leipzig D-04103 Germany
| | - Anna Zaghi
- Department of Chemistry and Pharmaceutical SciencesUniversity of Ferrara Luigi Borsari 46 Ferrara I-441213 Italy
| | - Josef J. Heiland
- Institute of Analytical ChemistryLeipzig University Linnéstraße 03 Leipzig D-04103 Germany
| | - Sebastian K. Piendl
- Institute of Analytical ChemistryLeipzig University Linnéstraße 03 Leipzig D-04103 Germany
| | - Kerry Gilmore
- Biomolecular Systems DepartmentMax-Planck-Institute for Colloids and Interfaces Am Mühlenberg 1 Postdam D-014476 Germany
| | - Peter H. Seeberger
- Biomolecular Systems DepartmentMax-Planck-Institute for Colloids and Interfaces Am Mühlenberg 1 Postdam D-014476 Germany
- Freie Universität Berlin Institute of Chemistry and Biochemistry Arnimallee 22 Berlin 14195 Germany
| | - Alessandro Massi
- Department of Chemistry and Pharmaceutical SciencesUniversity of Ferrara Luigi Borsari 46 Ferrara I-441213 Italy
| | - Detlev Belder
- Institute of Analytical ChemistryLeipzig University Linnéstraße 03 Leipzig D-04103 Germany
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6
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Rodríguez‐Escrich C, Pericàs MA. Catalytic Enantioselective Flow Processes with Solid‐Supported Chiral Catalysts. CHEM REC 2018; 19:1872-1890. [DOI: 10.1002/tcr.201800097] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 09/02/2018] [Indexed: 11/08/2022]
Affiliation(s)
- Carles Rodríguez‐Escrich
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science and Technology (BIST) Avinguda Països Catalans 16 43007 Tarragona Spain
| | - Miquel A. Pericàs
- Institute of Chemical Research of Catalonia (ICIQ)The Barcelona Institute of Science and Technology (BIST) Avinguda Països Catalans 16 43007 Tarragona Spain
- Departament de Química OrgànicaUniversitat de Barcelona 08080 Barcelona Spain
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7
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Nakashima E, Yamamoto H. Process Catalyst Mass Efficiency by Using Proline Tetrazole Column-Flow System. Chemistry 2018; 24:1076-1079. [PMID: 29315878 DOI: 10.1002/chem.201705982] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Indexed: 11/05/2022]
Abstract
Generally, organocatalysts are not decomposed during chemical transformation, which is different from traditional metal catalysts. To improve catalytic processes efficiency, various studies have been applied to flow synthesis for organocatalysis. Furthermore, many immobilized organocatalysts have been used for heterogeneous flow synthesis, which requires huge amounts of immobilized catalyst and requires several steps to prepare. We took advantage of organocatalysts with low-polarity organic solvent and developed a flow system through a packed-bed column with simply proline tetrazole (5-(2-pyrrolidinyl)-1H-tetrazole) for heterogeneous organocatalytic synthesis. Under ambient temperature, this heterogeneous organocatalyst continuous flow-column system with ketones as a donor provides aldol, Mannich, and o-nitroso aldol reactions in up to quantitative yields with excellent enantio- and chemoselectivity values. Our heterogeneous-flow synthesis provides extremely low process catalyst mass efficiency and continuous production without changing the packed-bed catalyst column.
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Affiliation(s)
- Erika Nakashima
- Molecular Catalyst Research Center, Chubu University, 1200 Matsumoto, Kasugai, Aichi, 487-8501, Japan
| | - Hisashi Yamamoto
- Molecular Catalyst Research Center, Chubu University, 1200 Matsumoto, Kasugai, Aichi, 487-8501, Japan
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Brenna D, Porta R, Massolo E, Raimondi L, Benaglia M. A New Class of Low-Loading Catalysts for Highly Enantioselective, Metal-Free Imine Reduction of Wide General Applicability. ChemCatChem 2017. [DOI: 10.1002/cctc.201700052] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Davide Brenna
- Dipartimento di Chimica; Università degli Studi di Milano; Via C. Golgi, 19 20133 Milano Italy
| | - Riccardo Porta
- Dipartimento di Chimica; Università degli Studi di Milano; Via C. Golgi, 19 20133 Milano Italy
| | - Elisabetta Massolo
- Dipartimento di Chimica; Università degli Studi di Milano; Via C. Golgi, 19 20133 Milano Italy
| | - Laura Raimondi
- Dipartimento di Chimica; Università degli Studi di Milano; Via C. Golgi, 19 20133 Milano Italy
| | - Maurizio Benaglia
- Dipartimento di Chimica; Università degli Studi di Milano; Via C. Golgi, 19 20133 Milano Italy
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9
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Dai W, Mi Y, Lv Y, Chen B, Li G, Chen G, Gao S. Development of a Continuous-Flow Microreactor for Asymmetric Sulfoxidation Using a Biomimetic Manganese Catalyst. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201501023] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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10
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Bortolini O, Cavazzini A, Giovannini PP, Greco R, Marchetti N, Massi A, Pasti L. A combined kinetic and thermodynamic approach for the interpretation of continuous-flow heterogeneous catalytic processes. Chemistry 2013; 19:7802-8. [PMID: 23589216 DOI: 10.1002/chem.201300181] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Indexed: 11/06/2022]
Abstract
The heterogeneous proline-catalyzed aldol reaction was investigated under continuous-flow conditions by means of a packed-bed microreactor. Reaction-progress kinetic analysis (RPKA) was used in combination with nonlinear chromatography for the interpretation, under synthetically relevant conditions, of important mechanistic aspects of the heterogeneous catalytic process at a molecular level. The information gathered by RPKA and nonlinear chromatography proved to be highly complementary and allowed for the assessment of optimal operating variables. In particular, the determination of the rate-determining step was pivotal for optimizing the feed composition. On the other hand, the competitive product inhibition was responsible for the unexpected decrease in the reaction yield following an apparently obvious variation in the feed composition. The study was facilitated by a suitable 2D instrumental arrangement for simultaneous flow reaction and online flow-injection analysis.
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Affiliation(s)
- Olga Bortolini
- Dipartimento di Scienze Chimiche e Farmaceutiche, Laboratorio di Chimica Organica, Università di Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy
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11
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Arakawa Y, Wennemers H. Enamine catalysis in flow with an immobilized peptidic catalyst. CHEMSUSCHEM 2013; 6:242-245. [PMID: 23161643 DOI: 10.1002/cssc.201200740] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Indexed: 06/01/2023]
Abstract
Pep talk: An immobilized peptidic catalyst achieves more than 600 turnovers in a continuous-flow system, allowing the production of chiral γ-nitroaldehydes with excellent stereoselectivities on a scale of >450 mmol (>100 g). Such a high efficiency opens the way for more practical applications of enamine catalysis.
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Affiliation(s)
- Yukihiro Arakawa
- Laboratorium für Organische Chemie, ETH Zürich, Wolfgang-Pauli-Strasse 10, 8093 Zürich, Switzerland
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12
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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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13
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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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14
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Chinnusamy T, Yudha SS, Hager M, Kreitmeier P, Reiser O. Application of metal-based reagents and catalysts in microstructured flow devices. CHEMSUSCHEM 2012; 5:247-55. [PMID: 22275318 DOI: 10.1002/cssc.201100444] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Indexed: 05/23/2023]
Abstract
Over the years, organic synthesis has witnessed several improvements through the development of new chemical transformations or more efficient reagents for known processes. Likewise, technological advances, aiming at speeding up reactions and facilitating their work-up, have established themselves in academic as well as in industrial laboratories. In this Minireview, we highlight very recent developments in flow chemistry, focusing on organometallic reagents and catalysts. First, we describe reactions with homogeneous catalysts immobilized on different support materials using the concept of packed bed reactors. In the last chapter, we will discuss applications that utilize organometallic reagents.
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15
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Otvös SB, Mándity IM, Fülöp F. Highly efficient 1,4-addition of aldehydes to nitroolefins: organocatalysis in continuous flow by solid-supported peptidic catalysts. CHEMSUSCHEM 2012; 5:266-269. [PMID: 22298413 DOI: 10.1002/cssc.201100332] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2011] [Revised: 01/06/2012] [Indexed: 05/31/2023]
Affiliation(s)
- Sándor B Otvös
- Institute of Pharmaceutical Chemistry, University of Szeged, Szeged, Hungary
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16
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Ayats C, Henseler AH, Pericàs MA. A solid-supported organocatalyst for continuous-flow enantioselective aldol reactions. CHEMSUSCHEM 2012; 5:320-5. [PMID: 22442839 DOI: 10.1002/cssc.201100570] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Asymmetric aldol reactions catalyzed by a novel polystyrene-immobilized proline derivative occur in short reaction times with excellent diastereo- and enantioselectivity. The catalyst can be recovered by simple filtration and shows very high reusability. The high activity depicted by the supported catalyst and its chemical and mechanical stability have allowed its application in packed-bed reactors for continuous flow processing. This system can produce enantio- and diastereomerically pure aldol adducts under continuous flow conditions with a residence time of 26 min. Furthermore, the reactor allowed processing of four different aldol products in sequence without any decrease in both catalytic activity and optical purity. The effective catalyst loading could be reduced to 1.6% (six-fold reduction of catalyst loading compared to the corresponding batch process).
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Affiliation(s)
- Carles Ayats
- Institute of Chemical Research of Catalonia (ICIQ), Tarragona, Spain
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Mohamed M, Gonçalves TP, Whitby RJ, Sneddon HF, Harrowven DC. New Insights into Cyclobutenone Rearrangements: A Total Synthesis of the Natural ROS-Generating Anti-Cancer Agent Cribrostatin 6. Chemistry 2011; 17:13698-705. [DOI: 10.1002/chem.201102263] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Indexed: 11/07/2022]
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18
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Fritzsche S, Ohla S, Glaser P, Giera DS, Sickert M, Schneider C, Belder D. Asymmetric Organocatalysis and Analysis on a Single Microfluidic Nanospray Chip. Angew Chem Int Ed Engl 2011; 50:9467-70. [DOI: 10.1002/anie.201102331] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2011] [Revised: 05/13/2011] [Indexed: 01/31/2023]
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Fritzsche S, Ohla S, Glaser P, Giera DS, Sickert M, Schneider C, Belder D. Asymmetrische Organokatalyse und Analyse in einem mikrofluidischen Nanospray-Chip. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201102331] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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20
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Hartman RL, McMullen JP, Jensen KF. Pro und kontra Strömungsreaktoren in der Synthese. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201004637] [Citation(s) in RCA: 151] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Hartman RL, McMullen JP, Jensen KF. Deciding whether to go with the flow: evaluating the merits of flow reactors for synthesis. Angew Chem Int Ed Engl 2011; 50:7502-19. [PMID: 21710673 DOI: 10.1002/anie.201004637] [Citation(s) in RCA: 638] [Impact Index Per Article: 49.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2010] [Indexed: 11/06/2022]
Abstract
The fine chemicals and pharmaceutical industries are transforming how their products are manufactured, where economically favorable, from traditional batchwise processes to continuous flow. This evolution is impacting synthetic chemistry on all scales-from the laboratory to full production. This Review discusses the relative merits of batch and micro flow reactors for performing synthetic chemistry in the laboratory.
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Affiliation(s)
- Ryan L Hartman
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Ave, 66-350, Cambridge, MA 02139, USA
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22
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Riva E, Rencurosi A, Gagliardi S, Passarella D, Martinelli M. Synthesis of (+)-dumetorine and congeners by using flow chemistry technologies. Chemistry 2011; 17:6221-6. [PMID: 21506188 DOI: 10.1002/chem.201100300] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2011] [Indexed: 11/05/2022]
Abstract
An efficient total synthesis of the natural alkaloid (+)-dumetorine by using flow technology is described. The process entailed five separate steps starting from the enantiopure (S)-2-(piperidin-2-yl)ethanol 4 with 29% overall yield. Most of the reactions were carried out by exploiting solvent superheating and by using packed columns of immobilized reagents or scavengers to minimize handling. New protocols for performing classical reactions under continuous flow are disclosed: the ring-closing metathesis reaction with a novel polyethylene glycol-supported Hoveyda catalyst and the unprecedented flow deprotection/Eschweiler-Clarke methylation sequence. The new protocols developed for the synthesis of (+)-dumetorine were applied to the synthesis of its simplified natural congeners (-)-sedamine and (+)-sedridine.
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Affiliation(s)
- Elena Riva
- Dipartimento di Chimica Organica e Industriale, Università degli Studi di Milano, Via Venezian 21, 20133 Milano, Italy
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Demuynck ALW, Peng L, de Clippel F, Vanderleyden J, Jacobs PA, Sels BF. Solid Acids as Heterogeneous Support for Primary Amino Acid-Derived Diamines in Direct Asymmetric Aldol Reactions. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201000871] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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24
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Ceylan S, Coutable L, Wegner J, Kirschning A. Inductive Heating with Magnetic Materials inside Flow Reactors. Chemistry 2011; 17:1884-93. [DOI: 10.1002/chem.201002291] [Citation(s) in RCA: 124] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2010] [Indexed: 11/10/2022]
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Brasholz M, Macdonald JM, Saubern S, Ryan JH, Holmes AB. A gram-scale batch and flow total synthesis of perhydrohistrionicotoxin. Chemistry 2010; 16:11471-80. [PMID: 20827703 DOI: 10.1002/chem.201001435] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The total synthesis of the spiropiperidine alkaloid (-)-perhydrohistrionicotoxin (perhydro-HTX) 2 has been accomplished on a gram scale by employing both conventional batch chemistry as well as microreactor techniques. (S)-(-)-6-Pentyltetrahydro-pyran-2-one 8 underwent nucleophilic ring opening to afford the alcohol 10, which was elaborated to the nitrone 13. Protection of the nitrone as the 1,3-adduct of styrene and side-chain extension to the unsaturated nitrile afforded a precursor 17, which underwent dipolar cycloreversion and 1,3-dipolar cycloaddition to give the core spirocyclic precursor 18 that was converted into perhydro-HTX 2. The principal steps to the spirocycle 18 have successfully been transferred into flow mode by using different types of microreactors and in a telescoped fashion, allowing for a more rapid access to the histrionicotoxins and their analogues by continuous processing.
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Affiliation(s)
- Malte Brasholz
- CSIRO Molecular and Health Technologies, Bayview Avenue, Clayton, VIC 3168, Australia
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Razzaq T, Kappe CO. Continuous flow organic synthesis under high-temperature/pressure conditions. Chem Asian J 2010; 5:1274-89. [PMID: 20411525 DOI: 10.1002/asia.201000010] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Microreactor technology and continuous flow processing in general are key features in making organic synthesis both more economical and environmentally friendly. When preformed under a high-temperature/pressure process intensification regime many transformations originally not considered suitable for flow synthesis owing to long reaction times can be converted into high-speed flow chemistry protocols that can operate at production-scale quantities. This Focus Review summarizes the state of the art in high-temperature/pressure microreactor technology and provides a survey of successful applications of this technique from the recent synthetic organic chemistry literature.
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Affiliation(s)
- Tahseen Razzaq
- Christian Doppler Laboratory for Microwave Chemistry (CDLMC) and Institute of Chemistry, Karl-Franzens-University Graz, Heinrichstrasse 28, A-8010 Graz, Austria
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Valera F, Quaranta M, Moran A, Blacker J, Armstrong A, Cabral J, Blackmond D. The Flow’s the Thing…︁Or Is It? Assessing the Merits of Homogeneous Reactions in Flask and Flow. Angew Chem Int Ed Engl 2010; 49:2478-85. [DOI: 10.1002/anie.200906095] [Citation(s) in RCA: 162] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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28
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Valera F, Quaranta M, Moran A, Blacker J, Armstrong A, Cabral J, Blackmond D. Der Fluss ist das Ding …︁ oder ist er es? Ein Vergleich homogener Reaktionen in Reaktionskolben und Durchflussreaktoren. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200906095] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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29
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Alza E, Rodríguez-Escrich C, Sayalero S, Bastero A, Pericàs M. A Solid-Supported Organocatalyst for Highly Stereoselective, Batch, and Continuous-Flow Mannich Reactions. Chemistry 2009; 15:10167-72. [DOI: 10.1002/chem.200901310] [Citation(s) in RCA: 126] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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