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García-Lacuna J, Baumann M. Inline purification in continuous flow synthesis – opportunities and challenges. Beilstein J Org Chem 2022. [DOI: 10.3762/bjoc.18.182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Continuous flow technology has become the method of choice for many academic and industrial researchers when developing new routes to chemical compounds of interest. With this technology maturing over the last decades, robust and oftentimes automated processes are now commonly exploited to generate fine chemical building blocks. The integration of effective inline analysis and purification tools is thereby frequently exploited to achieve effective and reliable flow processes. This perspective article summarizes recent applications of different inline purification techniques such as chromatography, extractions, and crystallization from academic and industrial laboratories. A discussion of the advantages and drawbacks of these tools is provided as a guide to aid researchers in selecting the most appropriate approach for future applications. It is hoped that this perspective contributes to new developments in this field in the context of process and cost efficiency, sustainability and industrial uptake of new flow chemistry tools developed in academia.
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Meyer LE, Hobisch M, Kara S. Process intensification in continuous flow biocatalysis by up and downstream processing strategies. Curr Opin Biotechnol 2022; 78:102835. [PMID: 36332339 DOI: 10.1016/j.copbio.2022.102835] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2022] [Revised: 10/01/2022] [Accepted: 10/03/2022] [Indexed: 11/06/2022]
Abstract
In this review, we focus on the holistic continuous enzymatic production and put special emphasis on process intensification by up- and downstream processing in continuous flow biocatalysis. After a brief introduction, we provide an overview of current examples of enzyme immobilization as an upstream process for flow biocatalysis. Thereafter, we provide an overview of unit operations as downstream processing strategies, namely continuous (i) liquid-liquid extraction, (ii) adsorptive downstream processing, and (iii) crystallization and precipitation. Eventually, we present our perspectives on future trends in this research field.
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Affiliation(s)
- Lars-Erik Meyer
- Biocatalysis and Bioprocessing Group, Department of Biological and Chemical Engineering, Aarhus University, Gustav Wieds Vej 10, 8000 Aarhus, Denmark
| | - Markus Hobisch
- Biocatalysis and Bioprocessing Group, Department of Biological and Chemical Engineering, Aarhus University, Gustav Wieds Vej 10, 8000 Aarhus, Denmark
| | - Selin Kara
- Biocatalysis and Bioprocessing Group, Department of Biological and Chemical Engineering, Aarhus University, Gustav Wieds Vej 10, 8000 Aarhus, Denmark; Institute of Technical Chemistry, Leibniz University Hannover, Callinstr. 5, 30167 Hannover, Germany.
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3
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Ene-reductase transformation of massoia lactone to δ-decalactone in a continuous-flow reactor. Sci Rep 2021; 11:18794. [PMID: 34552113 PMCID: PMC8458379 DOI: 10.1038/s41598-021-97585-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 08/27/2021] [Indexed: 11/28/2022] Open
Abstract
The demand for natural food flavorings increases every year. Biotransformation has become an attractive approach to obtain natural products. In this work, enantiomerically pure (R)-(+)-δ-decalactone was obtained by reduction of the C=C double bond of natural massoia lactone in a continuous-flow reactor. Of 13 different ene-reductases isolated, purified and tested, OYE3 was found to be the most efficient biocatalyst. The selected biocatalyst, either in the form of purified enzyme, cell lysate, whole cells or immobilized cells, was tested in the batch system as well as in the packed-bed flow bioreactor. The biotransformation performed in batch mode, using Ca2+-alginate immobilized cells of Escherichia coli BL21(DE3)/pET30a-OYE3, furnished the desired product with complete conversion in 30 min. The process was intensified using a continuous-flow reactor-membrane filtration system (flow 0.1 mL/min, substrate concentration 10 mM, pH 7, 24 °C) with cell lysate as biocatalyst combined with a cofactor regeneration system, which allowed obtaining > 99% bioconversion of massoia lactone.
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Biocatalyzed Flow Oxidation of Tyrosol to Hydroxytyrosol and Efficient Production of Their Acetate Esters. Antioxidants (Basel) 2021; 10:antiox10071142. [PMID: 34356374 PMCID: PMC8301122 DOI: 10.3390/antiox10071142] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 07/08/2021] [Accepted: 07/15/2021] [Indexed: 11/17/2022] Open
Abstract
Tyrosol (Ty) and hydroxytyrosol (HTy) are valuable dietary phenolic compounds present in olive oil and wine, widely used for food, nutraceutical and cosmetic applications. Ty and HTy are endowed with a number of health-related biological activities, including antioxidant, antimicrobial and anti-inflammatory properties. In this work, we developed a sustainable, biocatalyzed flow protocol for the chemo- and regio-selective oxidation of Ty into HTy catalyzed by free tyrosinase from Agaricus bisporus in a gas/liquid biphasic system. The aqueous flow stream was then in-line extracted to recirculate the water medium containing the biocatalyst and the excess ascorbic acid, thus improving the cost-efficiency of the process and creating a self-sufficient closed-loop system. The organic layer was purified in-line through a catch-and-release procedure using supported boronic acid that was able to trap HTy and leave the unreacted Ty in solution. Moreover, the acetate derivatives (TyAc and HTyAc) were produced by exploiting a bioreactor packed with an immobilized acyltransferase from Mycobacterium smegmatis (MsAcT), able to selectively act on the primary alcohol. Under optimized conditions, high-value HTy was obtained in 75% yield, whereas TyAc and HTyAc were isolated in yields of up to 80% in only 10 min of residence time.
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Abstract
Recent years have witnessed a growing interest in the use of biocatalysts in flow reactors. This merging combines the high selectivity and mild operation conditions typical of biocatalysis with enhanced mass transfer and resource efficiency associated to flow chemistry. Additionally, it provides a sound environment to emulate Nature by mimicking metabolic pathways in living cells and to produce goods through the systematic organization of enzymes towards efficient cascade reactions. Moreover, by enabling the combination of enzymes from different hosts, this approach paves the way for novel pathways. The present review aims to present recent developments within the scope of flow chemistry involving multi-enzymatic cascade reactions. The types of reactors used are briefly addressed. Immobilization methodologies and strategies for the application of the immobilized biocatalysts are presented and discussed. Key aspects related to the use of whole cells in flow chemistry are presented. The combination of chemocatalysis and biocatalysis is also addressed and relevant aspects are highlighted. Challenges faced in the transition from microscale to industrial scale are presented and discussed.
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Adebar N, Nastke A, Gröger H. Concepts for flow chemistry with whole-cell biocatalysts. REACT CHEM ENG 2021. [DOI: 10.1039/d0re00331j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
By combining continuous flow processing and biocatalysis, efficient, stable and cost-effective processes can be realised. In this review, an overview about different concepts for continuous flow processes based on the use of whole-cells as catalysts is given.
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Affiliation(s)
- Niklas Adebar
- Chair of Industrial Organic Chemistry and Biotechnology
- Faculty of Chemistry
- Bielefeld University
- 33615 Bielefeld
- Germany
| | - Alina Nastke
- Chair of Industrial Organic Chemistry and Biotechnology
- Faculty of Chemistry
- Bielefeld University
- 33615 Bielefeld
- Germany
| | - Harald Gröger
- Chair of Industrial Organic Chemistry and Biotechnology
- Faculty of Chemistry
- Bielefeld University
- 33615 Bielefeld
- Germany
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7
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Naramittanakul A, Buttranon S, Petchsuk A, Chaiyen P, Weeranoppanant N. Development of a continuous-flow system with immobilized biocatalysts towards sustainable bioprocessing. REACT CHEM ENG 2021. [DOI: 10.1039/d1re00189b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Implementing immobilized biocatalysts in continuous-flow systems can enable a sustainable process through enhanced enzyme stability, better transport and process continuity as well as simplified recycle and downstream processing.
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Affiliation(s)
- Apisit Naramittanakul
- School of Biomolecular Science and Engineering (BSE), Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand
| | - Supacha Buttranon
- School of Biomolecular Science and Engineering (BSE), Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand
| | - Atitsa Petchsuk
- National Metal and Materials Technology Center (MTEC), Pathum Thani 12120, Thailand
| | - Pimchai Chaiyen
- School of Biomolecular Science and Engineering (BSE), Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand
| | - Nopphon Weeranoppanant
- School of Biomolecular Science and Engineering (BSE), Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand
- Department of Chemical Engineering, Faculty of Engineering, Burapha University, Chonburi 20131, Thailand
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8
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Benítez-Mateos AI, Contente ML, Roura Padrosa D, Paradisi F. Flow biocatalysis 101: design, development and applications. REACT CHEM ENG 2021. [DOI: 10.1039/d0re00483a] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Flow biocatalysis: where to start? This tutorial review aims to guide and inspire new-comers to the field to boost the potential of flow biocatalysis.
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Affiliation(s)
| | | | | | - Francesca Paradisi
- Department of Chemistry and Biochemistry
- University of Bern
- Bern
- Switzerland
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9
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Abstract
Enzymatic methods for the oxidation of alcohols are critically reviewed. Dehydrogenases and oxidases are the most prominent biocatalysts, enabling the selective oxidation of primary alcohols into aldehydes or acids. In the case of secondary alcohols, region and/or enantioselective oxidation is possible. In this contribution, we outline the current state-of-the-art and discuss current limitations and promising solutions.
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10
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Abstract
A flow-based chemo-enzymatic synthesis of selected APIs (i.e., butacaine, procaine and procainamide) has been developed. A bioreactor made of MsAcT, a versatile acyltransferase from Mycobacterium smegmatis, immobilised on glyoxyl–garose, was exploited to efficiently prepare amide and ester intermediates in gram scale. Immobilised MsAcT was employed in pure organic solvent, demonstrating high stability and reusability. In-line purification of the key intermediates using polymer-bound sulphonyl chloride was added after the bioreactor, enhancing the automation of the process. A final hydrogenation step using the H-Cube reactor was further carried out to obtain the selected APIs in excellent yields (>99%), making the process fast, safe and easily handled.
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11
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Abstract
The rapid evolution of enzyme technology has enabled new reactions and processes with a level of efficiency which was unimaginable only a few years ago [...]
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Tamborini L, Previtali C, Annunziata F, Bavaro T, Terreni M, Calleri E, Rinaldi F, Pinto A, Speranza G, Ubiali D, Conti P. An Enzymatic Flow-Based Preparative Route to Vidarabine. Molecules 2020; 25:molecules25051223. [PMID: 32182773 PMCID: PMC7179437 DOI: 10.3390/molecules25051223] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 02/27/2020] [Accepted: 03/07/2020] [Indexed: 12/11/2022] Open
Abstract
The bi-enzymatic synthesis of the antiviral drug vidarabine (arabinosyladenine, ara-A), catalyzed by uridine phosphorylase from Clostridium perfringens (CpUP) and a purine nucleoside phosphorylase from Aeromonas hydrophila (AhPNP), was re-designed under continuous-flow conditions. Glyoxyl–agarose and EziGTM1 (Opal) were used as immobilization carriers for carrying out this preparative biotransformation. Upon setting-up reaction parameters (substrate concentration and molar ratio, temperature, pressure, residence time), 1 g of vidarabine was obtained in 55% isolated yield and >99% purity by simply running the flow reactor for 1 week and then collecting (by filtration) the nucleoside precipitated out of the exiting flow. Taking into account the substrate specificity of CpUP and AhPNP, the results obtained pave the way to the use of the CpUP/AhPNP-based bioreactor for the preparation of other purine nucleosides.
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Affiliation(s)
- Lucia Tamborini
- Department of Pharmaceutical Sciences, University of Milan, via Mangiagalli 25, 20133 Milano, Italy; (C.P.); (F.A.); (P.C.)
- Correspondence: (L.T.); (D.U.); Tel.: +39-02-50319367 (L.T.); +39-0382-987889 (D.U.)
| | - Clelia Previtali
- Department of Pharmaceutical Sciences, University of Milan, via Mangiagalli 25, 20133 Milano, Italy; (C.P.); (F.A.); (P.C.)
| | - Francesca Annunziata
- Department of Pharmaceutical Sciences, University of Milan, via Mangiagalli 25, 20133 Milano, Italy; (C.P.); (F.A.); (P.C.)
| | - Teodora Bavaro
- Department of Drug Sciences, University of Pavia, viale Taramelli 12, 27100 Pavia, Italy; (T.B.); (M.T.); (E.C.); (F.R.)
| | - Marco Terreni
- Department of Drug Sciences, University of Pavia, viale Taramelli 12, 27100 Pavia, Italy; (T.B.); (M.T.); (E.C.); (F.R.)
| | - Enrica Calleri
- Department of Drug Sciences, University of Pavia, viale Taramelli 12, 27100 Pavia, Italy; (T.B.); (M.T.); (E.C.); (F.R.)
| | - Francesca Rinaldi
- Department of Drug Sciences, University of Pavia, viale Taramelli 12, 27100 Pavia, Italy; (T.B.); (M.T.); (E.C.); (F.R.)
| | - Andrea Pinto
- Department of Food, Environmental and Nutritional Sciences, University of Milan, via Celoria 2, 20133 Milano, Italy;
| | - Giovanna Speranza
- Department of Chemistry, University of Milan, via Golgi 19, 20133 Milano, Italy;
| | - Daniela Ubiali
- Department of Drug Sciences, University of Pavia, viale Taramelli 12, 27100 Pavia, Italy; (T.B.); (M.T.); (E.C.); (F.R.)
- Correspondence: (L.T.); (D.U.); Tel.: +39-02-50319367 (L.T.); +39-0382-987889 (D.U.)
| | - Paola Conti
- Department of Pharmaceutical Sciences, University of Milan, via Mangiagalli 25, 20133 Milano, Italy; (C.P.); (F.A.); (P.C.)
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De Santis P, Meyer LE, Kara S. The rise of continuous flow biocatalysis – fundamentals, very recent developments and future perspectives. REACT CHEM ENG 2020. [DOI: 10.1039/d0re00335b] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Very recent developments in the field of biocatalysis in continuously operated systems. Special attention on the future perspectives in this key emerging technological area ranging from process analytical technologies to digitalization.
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Affiliation(s)
- Piera De Santis
- Aarhus University
- Department of Engineering, Biological and Chemical Engineering Section
- Biocatalysis and Bioprocessing Group
- DK 8000 Aarhus
- Denmark
| | - Lars-Erik Meyer
- Aarhus University
- Department of Engineering, Biological and Chemical Engineering Section
- Biocatalysis and Bioprocessing Group
- DK 8000 Aarhus
- Denmark
| | - Selin Kara
- Aarhus University
- Department of Engineering, Biological and Chemical Engineering Section
- Biocatalysis and Bioprocessing Group
- DK 8000 Aarhus
- Denmark
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14
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Romero-Fernández M, Paradisi F. Protein immobilization technology for flow biocatalysis. Curr Opin Chem Biol 2019; 55:1-8. [PMID: 31865258 DOI: 10.1016/j.cbpa.2019.11.008] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 10/29/2019] [Accepted: 11/19/2019] [Indexed: 12/01/2022]
Abstract
Enzymatic immobilization has been at the forefront of applied biocatalysis as it enables convenient isolation and reuse of the catalyst if the target reaction is conducted in batch, and it has opened up significant opportunities to conduct biocatalysis in continuous mode. Over the last few years, an array of techniques to immobilize enzymes have been developed, spanning from covalent multipoint attachment to noncovalent electrostatic strategies to rational architecture to suitably orient the enzyme(s). In addition, new materials have been adapted to support biological catalysts. Here, we discuss the advances of the last two years in enzyme immobilization for continuous flow applications.
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Affiliation(s)
| | - Francesca Paradisi
- School of Chemistry, University of Nottingham, University Park, NG7 2RD, Nottingham, UK; Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012, Bern, Switzerland.
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