1
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Myrtollari K, Calderini E, Kracher D, Schöngaßner T, Galušić S, Slavica A, Taden A, Mokos D, Schrüfer A, Wirnsberger G, Gruber K, Daniel B, Kourist R. Stability Increase of Phenolic Acid Decarboxylase by a Combination of Protein and Solvent Engineering Unlocks Applications at Elevated Temperatures. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2024; 12:3575-3584. [PMID: 38456190 PMCID: PMC10915792 DOI: 10.1021/acssuschemeng.3c06513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/16/2023] [Accepted: 01/25/2024] [Indexed: 03/09/2024]
Abstract
Enzymatic decarboxylation of biobased hydroxycinnamic acids gives access to phenolic styrenes for adhesive production. Phenolic acid decarboxylases are proficient enzymes that have been applied in aqueous systems, organic solvents, biphasic systems, and deep eutectic solvents, which makes stability a key feature. Stabilization of the enzyme would increase the total turnover number and thus reduce the energy consumption and waste accumulation associated with biocatalyst production. In this study, we used ancestral sequence reconstruction to generate thermostable decarboxylases. Investigation of a set of 16 ancestors resulted in the identification of a variant with an unfolding temperature of 78.1 °C and a half-life time of 45 h at 60 °C. Crystal structures were determined for three selected ancestors. Structural attributes were calculated to fit different regression models for predicting the thermal stability of variants that have not yet been experimentally explored. The models rely on hydrophobic clusters, salt bridges, hydrogen bonds, and surface properties and can identify more stable proteins out of a pool of candidates. Further stabilization was achieved by the application of mixtures of natural deep eutectic solvents and buffers. Our approach is a straightforward option for enhancing the industrial application of the decarboxylation process.
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Affiliation(s)
- Kamela Myrtollari
- Institute
of Molecular Biotechnology, Graz University
of Technology, Petersgasse
14, 8010 Graz, Austria
- Austrian
Centre of Industrial Biotechnology, ACIB GmbH, Petersgasse 14/1, 8010 Graz, Austria
- Adhesive
Technologies, Henkel AG & Co. KGaA, Henkelstr. 67, 40191 Düsseldorf, Germany
| | - Elia Calderini
- Institute
of Molecular Biotechnology, Graz University
of Technology, Petersgasse
14, 8010 Graz, Austria
| | - Daniel Kracher
- Institute
of Molecular Biotechnology, Graz University
of Technology, Petersgasse
14, 8010 Graz, Austria
- BioTechMed-Graz, Mozartgasse
12/II, 8010 Graz, Austria
| | - Tobias Schöngaßner
- Institute
of Molecular Biotechnology, Graz University
of Technology, Petersgasse
14, 8010 Graz, Austria
| | - Stela Galušić
- Institute
of Molecular Biotechnology, Graz University
of Technology, Petersgasse
14, 8010 Graz, Austria
| | - Anita Slavica
- Faculty
of Food Technology and Biotechnology, Department of Biochemical Engineering, University of Zagreb, Pierottijeva 6, HR-10000 Zagreb, Croatia
| | - Andreas Taden
- Adhesive
Technologies, Henkel AG & Co. KGaA, Henkelstr. 67, 40191 Düsseldorf, Germany
| | - Daniel Mokos
- Institute
of Molecular Biosciences, University of
Graz, NAWI Graz, Humboldtstraße
50/3, 8010 Graz, Austria
| | - Anna Schrüfer
- Institute
of Molecular Biosciences, University of
Graz, NAWI Graz, Humboldtstraße
50/3, 8010 Graz, Austria
| | - Gregor Wirnsberger
- Institute
of Molecular Biosciences, University of
Graz, NAWI Graz, Humboldtstraße
50/3, 8010 Graz, Austria
| | - Karl Gruber
- BioTechMed-Graz, Mozartgasse
12/II, 8010 Graz, Austria
- Institute
of Molecular Biosciences, University of
Graz, NAWI Graz, Humboldtstraße
50/3, 8010 Graz, Austria
| | - Bastian Daniel
- BioTechMed-Graz, Mozartgasse
12/II, 8010 Graz, Austria
- Institute
of Molecular Biosciences, University of
Graz, NAWI Graz, Humboldtstraße
50/3, 8010 Graz, Austria
| | - Robert Kourist
- Institute
of Molecular Biotechnology, Graz University
of Technology, Petersgasse
14, 8010 Graz, Austria
- Austrian
Centre of Industrial Biotechnology, ACIB GmbH, Petersgasse 14/1, 8010 Graz, Austria
- BioTechMed-Graz, Mozartgasse
12/II, 8010 Graz, Austria
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2
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Meyer J, Meyer L, Kara S. Enzyme immobilization in hydrogels: A perfect liaison for efficient and sustainable biocatalysis. Eng Life Sci 2022; 22:165-177. [PMID: 35382546 PMCID: PMC8961036 DOI: 10.1002/elsc.202100087] [Citation(s) in RCA: 30] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 11/24/2021] [Accepted: 11/29/2021] [Indexed: 12/11/2022] Open
Abstract
Biocatalysis is an established chemical synthesis technology that has by no means been restricted to research laboratories. The use of enzymes for organic synthesis has evolved greatly from early development to proof-of-concept - from small batch production to industrial scale. Different enzyme immobilization strategies contributed to this success story. Recently, the use of hydrogel materials for the immobilization of enzymes has been attracting great interest. Within this review, we pay special attention to recent developments in this key emerging field of research. Firstly, we will briefly introduce the concepts of both biocatalysis and hydrogel worlds. Then, we list recent interesting publications that link both concepts. Finally, we provide an outlook and comment on future perspectives of further exploration of enzyme immobilization strategies in hydrogels.
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Affiliation(s)
- Johanna Meyer
- Institute of Technical ChemistryLeibniz University HannoverHannoverGermany
| | - Lars‐Erik Meyer
- Biocatalysis and Bioprocessing GroupDepartment of Biological and Chemical EngineeringAarhus UniversityAarhusDenmark
| | - Selin Kara
- Institute of Technical ChemistryLeibniz University HannoverHannoverGermany
- Biocatalysis and Bioprocessing GroupDepartment of Biological and Chemical EngineeringAarhus UniversityAarhusDenmark
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3
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Enzymatic Synthesis and Molecular Modelling Studies of Rhamnose Esters Using Lipase from Pseudomonas stutzeri. Int J Mol Sci 2022; 23:ijms23042239. [PMID: 35216354 PMCID: PMC8876684 DOI: 10.3390/ijms23042239] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 02/05/2022] [Accepted: 02/08/2022] [Indexed: 12/29/2022] Open
Abstract
Rhamnolipids are becoming an important class of glycolipid biosurfactants. Herein, we describe for the first time the enzymatic synthesis of rhamnose fatty acid esters by the transesterification of rhamnose with fatty acid vinyl esters, using lipase from Pseudomonas stutzeri as a biocatalyst. The use of this lipase allows excellent catalytic activity in the synthesis of 4-O-acylrhamnose (99% conversion and full regioselectivity) after 3 h of reaction using tetrahydrofuran (THF) as the reaction media and an excess of vinyl laurate as the acyl donor. The role of reaction conditions, such as temperature, the substrates molar ratio, organic reaction medium and acyl donor chain-length, was studied. Optimum conditions were found using 35 °C, a molar ratio of 1:3 (rhamnose:acyldonor), solvents with a low logP value, and fatty acids with chain lengths from C4 to C18 as acyl donors. In hydrophilic solvents such as THF and acetone, conversions of up to 99–92% were achieved after 3 h of reaction. In a more sustainable solvent such as 2-methyl-THF (2-MeTHF), high conversions were also obtained (86%). Short and medium chain acyl donors (C4–C10) allowed maximum conversions after 3 h, and long chain acyl donors (C12–C18) required longer reactions (5 h) to get 99% conversions. Furthermore, scaled up reactions are feasible without losing catalytic action and regioselectivity. In order to explain enzyme regioselectivity and its ability to accommodate ester chains of different lengths, homology modelling, docking studies and molecular dynamic simulations were performed to explain the behaviour observed.
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4
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Bijoy R, Agarwala P, Roy L, Thorat BN. Unconventional Ethereal Solvents in Organic Chemistry: A Perspective on Applications of 2-Methyltetrahydrofuran, Cyclopentyl Methyl Ether, and 4-Methyltetrahydropyran. Org Process Res Dev 2021. [DOI: 10.1021/acs.oprd.1c00246] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Rachel Bijoy
- Institute of Chemical Technology Mumbai−IOC Odisha Campus Bhubaneswar, IIT Kharagpur Extension Centre, Bhubaneswar 751013, India
| | - Pratibha Agarwala
- Institute of Chemical Technology Mumbai−IOC Odisha Campus Bhubaneswar, IIT Kharagpur Extension Centre, Bhubaneswar 751013, India
| | - Lisa Roy
- Institute of Chemical Technology Mumbai−IOC Odisha Campus Bhubaneswar, IIT Kharagpur Extension Centre, Bhubaneswar 751013, India
| | - Bhaskar N. Thorat
- Institute of Chemical Technology Mumbai−IOC Odisha Campus Bhubaneswar, IIT Kharagpur Extension Centre, Bhubaneswar 751013, India
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5
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Guajardo N, Ahumada K, Domínguez de María P. Immobilization of Pseudomonas stutzeri lipase through Cross-linking Aggregates (CLEA) for reactions in Deep Eutectic Solvents. J Biotechnol 2021; 337:18-23. [PMID: 34171440 DOI: 10.1016/j.jbiotec.2021.06.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2021] [Revised: 06/17/2021] [Accepted: 06/18/2021] [Indexed: 11/25/2022]
Abstract
The use of deep eutectic solvents (DES) with buffer as cosolvent (up to 10 % v/v) leads to low-viscous media in which lipases can perform synthetic reactions, instead of hydrolysis. This paper explores the immobilization of Pseudomonas stutzeri lipase (TL) in cross-linking aggregates (CLEA) to deliver robust derivatives that are active in media like choline chloride - glycerol DES with buffer as cosolvent. While the free TL enzyme was markedly inactive in these media, TL-CLEA derivatives perform esterifications and can be reused several times. Overall, results are consistent with previous experiments reported for other lipases in these DES-water media and confirm that CLEA immobilization turns out a very useful and straightforward alternative for generating active (bio)catalysts for DES-aqueous media systems. Immobilized systems open the possibility of performing continuous processes in low-viscous DES-buffer media.
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Affiliation(s)
- Nadia Guajardo
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación, Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, San Joaquín, Santiago, Chile.
| | | | - Pablo Domínguez de María
- Sustainable Momentum, SL. Av. Ansite 3, 4-6, 35011, Las Palmas de Gran Canaria, Canary Is, Spain
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6
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Occhiato EG, De Marchi E, Arnodo D, Maffeis E, Scarpi D, Prandi C. Enantiodivergent Synthesis of Halofuginone by Candida antarctica Lipase B (CAL-B)-Catalyzed Kinetic Resolution in Cyclopentyl Methyl Ether (CPME). SYNOPEN 2021. [DOI: 10.1055/a-1523-6428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
AbstractThe synthesis of both enantiomers of a key intermediate in the synthesis of halofuginone was accomplished by a Candida antarctica lipase B (CAL-B)-catalyzed kinetic resolution of the corresponding racemate. When the resolution was carried out in the versatile solvent cyclopentyl methyl ether (CPME) using p-chlorophenylbutyrate (PCPB) as the acylating reagent, the highest enantiomeric ratio (E) values were measured, and highly enantioenriched (95% ee) compounds could be obtained in a single iteration. As an example, one of the two enantiomers was used as a starting material to prepare (+)-halofuginone in a three-step procedure.
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Affiliation(s)
| | - Elisa De Marchi
- Dipartimento di Chimica ‘Ugo Schiff’, Università degli Studi di Firenze
| | - Davide Arnodo
- Dipartimento di Chimica, Università degli Studi di Torino
| | | | - Dina Scarpi
- Dipartimento di Chimica ‘Ugo Schiff’, Università degli Studi di Firenze
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7
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Assessing biocatalysis using dihydrolevoglucosenone (Cyrene™) as versatile bio-based (co)solvent. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.110813] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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8
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Ballard A, Narduolo S, Ahmed HO, Keymer NI, Asaad N, Cosgrove DA, Buurma NJ, Leach AG. Racemisation in Chemistry and Biology. Chemistry 2020; 26:3661-3687. [PMID: 31709642 DOI: 10.1002/chem.201903917] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Indexed: 11/09/2022]
Abstract
The two enantiomers of a compound often have profoundly different biological properties and thus their liability to racemisation in aqueous solutions is an important piece of information. The authors reviewed the available data concerning the process of racemisation in vivo, in the presence of biological molecules (e.g., racemase enzymes, serum albumin, cofactors and derivatives) and under purely chemical but aqueous conditions (acid, base and other aqueous systems). Mechanistic studies are described critically in light of reported kinetic data. The types of experimental measurement that can be used to effectively determine rate constants of racemisation in various conditions are discussed and the data they provide is summarised. The proposed origins of enzymatic racemisation are presented and suggest ways to promote the process that are different from processes taking place in bulk water. Experimental and computational studies that provide understanding and quantitative predictions of racemisation risk are also presented.
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Affiliation(s)
- Andrew Ballard
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Stefania Narduolo
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Hiwa O Ahmed
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK.,Pharmaceutical Chemistry Department, Hawler Medical University, Erbil, Kurdistan Region, Iraq
| | - Nathaniel I Keymer
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Nabil Asaad
- AstraZeneca, Mereside, Alderley Park, Macclesfield, SK10 4TG, UK
| | | | - Niklaas J Buurma
- School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, UK
| | - Andrew G Leach
- Division of Pharmacy and Optometry, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
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9
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Muschallik L, Molinnus D, Jablonski M, Kipp CR, Bongaerts J, Pohl M, Wagner T, Schöning MJ, Selmer T, Siegert P. Synthesis of α-hydroxy ketones and vicinal (R,R)-diols by Bacillus clausii DSM 8716T butanediol dehydrogenase. RSC Adv 2020; 10:12206-12216. [PMID: 35497574 PMCID: PMC9050739 DOI: 10.1039/d0ra02066d] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Accepted: 03/05/2020] [Indexed: 12/04/2022] Open
Abstract
α-hydroxy ketones (HK) and 1,2-diols are important building blocks for fine chemical synthesis. Here, we describe the R-selective 2,3-butanediol dehydrogenase from B. clausii DSM 8716T (BcBDH) that belongs to the metal-dependent medium chain dehydrogenases/reductases family (MDR) and catalyzes the selective asymmetric reduction of prochiral 1,2-diketones to the corresponding HK and, in some cases, the reduction of the same to the corresponding 1,2-diols. Aliphatic diketones, like 2,3-pentanedione, 2,3-hexanedione, 5-methyl-2,3-hexanedione, 3,4-hexanedione and 2,3-heptanedione are well transformed. In addition, surprisingly alkyl phenyl dicarbonyls, like 2-hydroxy-1-phenylpropan-1-one and phenylglyoxal are accepted, whereas their derivatives with two phenyl groups are not substrates. Supplementation of Mn2+ (1 mM) increases BcBDH's activity in biotransformations. Furthermore, the biocatalytic reduction of 5-methyl-2,3-hexanedione to mainly 5-methyl-3-hydroxy-2-hexanone with only small amounts of 5-methyl-2-hydroxy-3-hexanone within an enzyme membrane reactor is demonstrated. Reduction of symmetric or asymmetric vicinal diketones with BcBDH leads to the synthesis of either α-hydroxyketones or vicinal diols.![]()
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Affiliation(s)
- Lukas Muschallik
- Institute of Nano- and Biotechnologies
- Aachen University of Applied Sciences
- 52428 Jülich
- Germany
| | - Denise Molinnus
- Institute of Nano- and Biotechnologies
- Aachen University of Applied Sciences
- 52428 Jülich
- Germany
| | - Melanie Jablonski
- Institute of Nano- and Biotechnologies
- Aachen University of Applied Sciences
- 52428 Jülich
- Germany
| | - Carina Ronja Kipp
- Institute of Nano- and Biotechnologies
- Aachen University of Applied Sciences
- 52428 Jülich
- Germany
| | - Johannes Bongaerts
- Institute of Nano- and Biotechnologies
- Aachen University of Applied Sciences
- 52428 Jülich
- Germany
| | - Martina Pohl
- IBG-1: Biotechnology
- Forschungszentrum Jülich
- 52425 Jülich
- Germany
| | - Torsten Wagner
- Institute of Nano- and Biotechnologies
- Aachen University of Applied Sciences
- 52428 Jülich
- Germany
| | - Michael J. Schöning
- Institute of Nano- and Biotechnologies
- Aachen University of Applied Sciences
- 52428 Jülich
- Germany
| | - Thorsten Selmer
- Institute of Nano- and Biotechnologies
- Aachen University of Applied Sciences
- 52428 Jülich
- Germany
| | - Petra Siegert
- Institute of Nano- and Biotechnologies
- Aachen University of Applied Sciences
- 52428 Jülich
- Germany
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10
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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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11
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Petrenz‐Beck A, Kühn J, Zuhse R, Ansorge‐Schumacher MB. Chemo‐Enzymatic Dynamic Kinetic Resolution of Symmetric and Non‐Symmetric α‐Hydroxy Ketones for Industrial Application. ChemistrySelect 2019. [DOI: 10.1002/slct.201900740] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Annika Petrenz‐Beck
- Chair of Molecular BiotechnologyTechnische Universität Dresden 01062 Dresden Germany
| | - Jasmin Kühn
- Chiracon GmbH Im Biotechnologiepark 9 14943 Luckenwalde Germany
| | - Ralf Zuhse
- Chiracon GmbH Im Biotechnologiepark 9 14943 Luckenwalde Germany
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12
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de Gonzalo G, Alcántara AR, Domínguez de María P. Cyclopentyl Methyl Ether (CPME): A Versatile Eco-Friendly Solvent for Applications in Biotechnology and Biorefineries. CHEMSUSCHEM 2019; 12:2083-2097. [PMID: 30735610 DOI: 10.1002/cssc.201900079] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 02/04/2019] [Indexed: 05/14/2023]
Abstract
The quest for sustainable solvents is currently a matter of intense research and development, as solvents significantly contribute heavily to the waste generated by chemical industries. Cyclopentyl methyl ether (CPME) is a promising eco-friendly solvent with valuable properties such as low peroxide formation rate, stability under basic and acidic conditions, and relatively high boiling point. This Review discusses the potential use of CPME for applications in biotechnology (e.g., biotransformations, as solvent or cosolvent), biorefineries, and bioeconomy (e.g., for furan synthesis or as an extractive agent in liquid-liquid separations), as well as for other purposes, such as chromatography or peptide synthesis. Although CPME is currently produced by petrochemical means with a remarkably high atom economy, its biogenic production can be envisaged from substrates such as cyclopentanol or cyclopentanone, which can be derived from furfural or from (bio-based) adipic acid, respectively. The combination of the promising properties of CPME as a (co)solvent with a future (economic) biogenic origin would be advantageous for setting strategies aligned with the sustainable chemistry principles.
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Affiliation(s)
- Gonzalo de Gonzalo
- Departamento de Química Orgánica, Universidad de Sevilla, c/ Profesor García González 2, 41012, Sevilla, Spain
| | - Andrés R Alcántara
- Department of Chemistry in Pharmaceutical Sciences, Section of Organic and Pharmaceutical Chemistry, Faculty of Pharmacy, Complutense University of Madrid, Plaza de Ramón y Cajal, s/n., E-28040, Madrid, Spain
| | - Pablo Domínguez de María
- Sustainable Momentum, SL, Av. Ansite 3, 4-6, Las Palmas Gran Canaria, E-35011, Canary Islands, Spain
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13
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Foley AM, Maguire AR. The Impact of Recent Developments in Technologies which Enable the Increased Use of Biocatalysts. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900208] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Aoife M. Foley
- School of Chemistry; Analytical & Biological Chemistry Research Facility; Synthesis & Solid State Pharmaceutical Centre; University College Cork; Cork Ireland
| | - Anita R. Maguire
- School of Chemistry & School of Pharmacy; Analytical & Biological Chemistry Research Facility; Synthesis & Solid State Pharmaceutical Centre; University College Cork; Cork Ireland
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14
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Pätzold M, Siebenhaller S, Kara S, Liese A, Syldatk C, Holtmann D. Deep Eutectic Solvents as Efficient Solvents in Biocatalysis. Trends Biotechnol 2019; 37:943-959. [PMID: 31000203 DOI: 10.1016/j.tibtech.2019.03.007] [Citation(s) in RCA: 158] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Revised: 02/21/2019] [Accepted: 03/05/2019] [Indexed: 11/26/2022]
Abstract
'Ideal' solvents in biocatalysis have to fulfill a large number of requirements, such as high substrate solubility, high enzyme activity and stability, and positive effects on reaction equilibrium. In the past decades, many enzymatic synthesis routes in water-based and nonaqueous (organic solvents, ionic or supercritical fluids) reaction media have been developed. However, no solvent meets every demand for different reaction types at the same time, and there is still a need for novel solvents suited for different reaction types and applications. Deep eutectic solvents (DESs) have recently been evaluated as solvents in different biocatalytic reactions. They can improve substrate supply, conversion, and stability. The best results were obtained when the DES is formed by the substrates of an enzymatic reaction.
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Affiliation(s)
- Magdalena Pätzold
- DECHEMA Research Institute, Industrial Biotechnology, Theodor-Heuss-Allee 25, 60486 Frankfurt am Main, Germany; Hamburg University of Technology, Institute of Technical Biocatalysis, Denickestr. 15, 21073 Hamburg, Germany
| | - Sascha Siebenhaller
- Karlsruhe Institute of Technology, Institute of Process Engineering in Life Sciences 2 - Technical Biology, Fritz-Haber-Weg 4, 76131 Karlsruhe, Germany
| | - Selin Kara
- Hamburg University of Technology, Institute of Technical Biocatalysis, Denickestr. 15, 21073 Hamburg, Germany; Aarhus University, Department of Engineering, Biocatalysis and Bioprocessing Group, Gustav Wieds Vej 10, 8000 Aarhus, Denmark
| | - Andreas Liese
- Hamburg University of Technology, Institute of Technical Biocatalysis, Denickestr. 15, 21073 Hamburg, Germany
| | - Christoph Syldatk
- Karlsruhe Institute of Technology, Institute of Process Engineering in Life Sciences 2 - Technical Biology, Fritz-Haber-Weg 4, 76131 Karlsruhe, Germany
| | - Dirk Holtmann
- DECHEMA Research Institute, Industrial Biotechnology, Theodor-Heuss-Allee 25, 60486 Frankfurt am Main, Germany.
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15
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Azzena U, Carraro M, Pisano L, Monticelli S, Bartolotta R, Pace V. Cyclopentyl Methyl Ether: An Elective Ecofriendly Ethereal Solvent in Classical and Modern Organic Chemistry. CHEMSUSCHEM 2019; 12:40-70. [PMID: 30246930 PMCID: PMC6391966 DOI: 10.1002/cssc.201801768] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 09/23/2018] [Indexed: 05/07/2023]
Abstract
Solvents represent one of the major contributions to the environmental impact of fine-chemical synthesis. As a result, the use of environmentally friendly solvents in widely employed reactions is a challenge of vast real interest in contemporary organic chemistry. Within this Review, a great variety of examples showing how cyclopentyl methyl ether has been established as particularly useful for this purpose are reported. Indeed, its low toxicity, high boiling point, low melting point, hydrophobicity, chemical stability towards a wide range of conditions, exceptional stability towards the abstraction of hydrogen atoms, relatively low latent heat of vaporization, and the ease with which it can be recovered and recycled enable its successful employment as a solvent in a wide range of synthetic applications, including organometallic chemistry, catalysis, biphasic reactions, oxidations, and radical reactions.
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Affiliation(s)
- Ugo Azzena
- Department of Chemistry and PharmacyUniversity of Sassarivia Vienna 2, I07100SassariItaly
| | - Massimo Carraro
- Department of Chemistry and PharmacyUniversity of Sassarivia Vienna 2, I07100SassariItaly
| | - Luisa Pisano
- Department of Chemistry and PharmacyUniversity of Sassarivia Vienna 2, I07100SassariItaly
| | - Serena Monticelli
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse 141090ViennaAustria
| | - Roberta Bartolotta
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse 141090ViennaAustria
| | - Vittorio Pace
- Department of Pharmaceutical ChemistryUniversity of ViennaAlthanstrasse 141090ViennaAustria
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16
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Di Carmine G, Bortolini O, Massi A, Müller M, Bernacchia G, Fantin G, Ragno D, Giovannini PP. Enzymatic Cross‐Benzoin‐Type Condensation of Aliphatic Aldehydes: Enantioselective Synthesis of 1‐Alkyl‐1‐hydroxypropan‐2‐ones and 1‐Alkyl‐1‐hydroxybutan‐2‐ones. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800357] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Graziano Di Carmine
- Dipartimento di Scienze Chimiche e FarmaceuticheUniversità di Ferrara Via Fossato di Mortara 17 44121 Ferrara Italy
| | - Olga Bortolini
- Dipartimento di Scienze Chimiche e FarmaceuticheUniversità di Ferrara Via Fossato di Mortara 17 44121 Ferrara Italy
| | - Alessandro Massi
- Dipartimento di Scienze Chimiche e FarmaceuticheUniversità di Ferrara Via Fossato di Mortara 17 44121 Ferrara Italy
| | - Michael Müller
- Institute of Pharmaceutical SciencesAlbert-Ludwigs-Universität Freiburg Albertstrasse 25 79104 Freiburg Germany
| | - Giovanni Bernacchia
- Dipartimento di Scienze della Vita e BiotecnologieUniversità di Ferrara Via L. Borsari 46 44121 Ferrara Italy
| | - Giancarlo Fantin
- Dipartimento di Scienze Chimiche e FarmaceuticheUniversità di Ferrara Via Fossato di Mortara 17 44121 Ferrara Italy
| | - Daniele Ragno
- Dipartimento di Scienze Chimiche e FarmaceuticheUniversità di Ferrara Via Fossato di Mortara 17 44121 Ferrara Italy
| | - Pier Paolo Giovannini
- Dipartimento di Scienze Chimiche e FarmaceuticheUniversità di Ferrara Via Fossato di Mortara 17 44121 Ferrara Italy
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17
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Hümmer M, Kara S, Liese A, Huth I, Schrader J, Holtmann D. Synthesis of (-)-menthol fatty acid esters in and from (-)-menthol and fatty acids – novel concept for lipase catalyzed esterification based on eutectic solvents. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2018.08.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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18
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Affiliation(s)
- Roger A. Sheldon
- Molecular
Sciences Institute, School of Chemistry, University of Witwatersrand, Johannesburg, PO Wits 2050, South Africa
- Department
of Biotechnology, Delft University of Technology, Section BOC, van der Maasweg 9, 2629 HZ, Delft, The Netherlands
| | - John M. Woodley
- Department
of Chemical and Biochemical Engineering, Technical University of Denmark, 2800 Lyngby, Denmark
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19
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Tian Y, Ma X, Yang M, Wei D, Su E. Synthesis of (S)-3-chloro-1-phenylpropanol by permeabilized recombinant Escherichia coli harboring Saccharomyces cerevisiae YOL151W reductase in 2-methyltetrahydrofuran cosolvent system. CATAL COMMUN 2017. [DOI: 10.1016/j.catcom.2017.04.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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20
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Belafriekh A, Secundo F, Serra S, Djeghaba Z. Enantioselective enzymatic resolution of racemic alcohols by lipases in green organic solvents. ACTA ACUST UNITED AC 2017. [DOI: 10.1016/j.tetasy.2017.02.004] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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21
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Aßmann M, Stöbener A, Mügge C, Gaßmeyer SK, Hilterhaus L, Kourist R, Liese A, Kara S. Reaction engineering of biocatalytic (S)-naproxen synthesis integrating in-line process monitoring by Raman spectroscopy. REACT CHEM ENG 2017. [DOI: 10.1039/c7re00043j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Biocatalytic (S)-naproxen synthesis using an (S)-selective arylmalonate decarboxylase mutant (AMDase G74C/M159L/C188G/V43I/A125P/V156L, AMDase-CLGIPL) exposes a promising environmentally friendly alternative to conventional chemical synthesis strategies.
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Affiliation(s)
- M. Aßmann
- Institute of Technical Biocatalysis
- Hamburg University of Technology
- 21073 Hamburg
- Germany
| | - A. Stöbener
- Institute of Technical Biocatalysis
- Hamburg University of Technology
- 21073 Hamburg
- Germany
| | - C. Mügge
- Junior Research Group for Microbial Biotechnology
- Ruhr-University Bochum
- 44780 Bochum
- Germany
| | - S. K. Gaßmeyer
- Junior Research Group for Microbial Biotechnology
- Ruhr-University Bochum
- 44780 Bochum
- Germany
| | - L. Hilterhaus
- Institute of Technical Biocatalysis
- Hamburg University of Technology
- 21073 Hamburg
- Germany
| | - R. Kourist
- Junior Research Group for Microbial Biotechnology
- Ruhr-University Bochum
- 44780 Bochum
- Germany
- Institute of Molecular Biotechnology
| | - A. Liese
- Institute of Technical Biocatalysis
- Hamburg University of Technology
- 21073 Hamburg
- Germany
| | - S. Kara
- Institute of Technical Biocatalysis
- Hamburg University of Technology
- 21073 Hamburg
- Germany
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22
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Médici R, Stammes H, Kwakernaak S, Otten LG, Hanefeld U. Assessing the stereoselectivity of Serratia marcescens CECT 977 2,3-butanediol dehydrogenase. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00169j] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The meso-2,3-butanediol dehydrogenase from Serratia marcescens CECT 977 can produce several optically active hydroxy ketones from both the alcohol or ketone precursor.
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Affiliation(s)
- Rosario Médici
- Biokatalyse
- Afdeling Biotechnologie
- Technische Universiteit Delft
- 2629 HZ Delft
- The Netherlands
| | - Hanna Stammes
- Biokatalyse
- Afdeling Biotechnologie
- Technische Universiteit Delft
- 2629 HZ Delft
- The Netherlands
| | - Stender Kwakernaak
- Biokatalyse
- Afdeling Biotechnologie
- Technische Universiteit Delft
- 2629 HZ Delft
- The Netherlands
| | - Linda G. Otten
- Biokatalyse
- Afdeling Biotechnologie
- Technische Universiteit Delft
- 2629 HZ Delft
- The Netherlands
| | - Ulf Hanefeld
- Biokatalyse
- Afdeling Biotechnologie
- Technische Universiteit Delft
- 2629 HZ Delft
- The Netherlands
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23
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de Miranda AS, de M. Silva MV, Dias FC, de Souza SP, Leão RAC, de Souza ROMA. Continuous flow dynamic kinetic resolution of rac-1-phenylethanol using a single packed-bed containing immobilized CAL-B lipase and VOSO4 as racemization catalysts. REACT CHEM ENG 2017. [DOI: 10.1039/c7re00003k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we report a method for the continuous flow DKR of rac-1-phenylethanol catalyzed by CAL-B and VOSO4, using a single packed-bed containing both catalysts.
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Affiliation(s)
- Amanda S. de Miranda
- Biocatalysis and Organic Synthesis Group
- Chemistry Institute
- Federal University of Rio de Janeiro
- Rio de Janeiro
- 21941909 Brazil
| | - Marcus V. de M. Silva
- Biocatalysis and Organic Synthesis Group
- Chemistry Institute
- Federal University of Rio de Janeiro
- Rio de Janeiro
- 21941909 Brazil
| | - Fernanda C. Dias
- Biocatalysis and Organic Synthesis Group
- Chemistry Institute
- Federal University of Rio de Janeiro
- Rio de Janeiro
- 21941909 Brazil
| | - Stefania P. de Souza
- Biocatalysis and Organic Synthesis Group
- Chemistry Institute
- Federal University of Rio de Janeiro
- Rio de Janeiro
- 21941909 Brazil
| | - Raquel A. C. Leão
- Biocatalysis and Organic Synthesis Group
- Chemistry Institute
- Federal University of Rio de Janeiro
- Rio de Janeiro
- 21941909 Brazil
| | - Rodrigo O. M. A. de Souza
- Biocatalysis and Organic Synthesis Group
- Chemistry Institute
- Federal University of Rio de Janeiro
- Rio de Janeiro
- 21941909 Brazil
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24
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Enzymatic deglycosylation of flavonoids in deep eutectic solvents-aqueous mixtures: paving the way for sustainable flavonoid chemistry. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcatb.2016.04.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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25
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Sheldon RA. Biocatalysis and Biomass Conversion in Alternative Reaction Media. Chemistry 2016; 22:12984-99. [DOI: 10.1002/chem.201601940] [Citation(s) in RCA: 127] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Roger A. Sheldon
- Molecular Sciences Institute; School of Chemistry; University of the Witwatersrand; 2050; Johannesburg South Africa
- Department of Biotechnology; Delft University of Technology; Julianalaan 136 2628 BL Delft Netherlands
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26
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Yang SL, Duan ZQ. Insight into enzymatic synthesis of phosphatidylserine in deep eutectic solvents. CATAL COMMUN 2016. [DOI: 10.1016/j.catcom.2016.04.010] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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27
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González-Martínez D, Gotor V, Gotor-Fernández V. Application of Deep Eutectic Solvents in Promiscuous Lipase-Catalysed Aldol Reactions. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501553] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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28
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Borowiecki P, Paprocki D, Dudzik A, Plenkiewicz J. Chemoenzymatic Synthesis of Proxyphylline Enantiomers. J Org Chem 2016; 81:380-95. [DOI: 10.1021/acs.joc.5b01840] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Paweł Borowiecki
- Warsaw University of Technology, Faculty of Chemistry,
Institute of Biotechnology, Koszykowa St. 3, 00-664 Warsaw, Poland
| | - Daniel Paprocki
- Warsaw University of Technology, Faculty of Chemistry,
Institute of Biotechnology, Koszykowa St. 3, 00-664 Warsaw, Poland
| | - Agnieszka Dudzik
- Jerzy
Haber Institute of Catalysis and Surface Chemistry, Polish Academy of Sciences, Niezapominajek St. 8, 30-239 Cracow, Poland
| | - Jan Plenkiewicz
- Warsaw University of Technology, Faculty of Chemistry,
Institute of Biotechnology, Koszykowa St. 3, 00-664 Warsaw, Poland
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29
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Sugiyama K, Oki Y, Kawanishi S, Kato K, Ikawa T, Egi M, Akai S. Spatial effects of oxovanadium-immobilized mesoporous silica on racemization of alcohols and application in lipase-catalyzed dynamic kinetic resolution. Catal Sci Technol 2016. [DOI: 10.1039/c6cy00257a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The nano-scale pores of mesoporous silica and their polar environment accelerate the racemization to make the lipase/oxovanadium combo-catalysed DKR applicable to a wider range of alcohols.
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Affiliation(s)
- Koji Sugiyama
- Graduate School of Pharmaceutical Sciences
- Osaka University
- Suita
- Japan
| | - Yasuhiro Oki
- Graduate School of Pharmaceutical Sciences
- Osaka University
- Suita
- Japan
| | - Shinji Kawanishi
- Graduate School of Pharmaceutical Sciences
- Osaka University
- Suita
- Japan
| | - Katsuya Kato
- National Institute of Advanced Industrial Science and Technology (AIST)
- Nagoya
- Japan
| | - Takashi Ikawa
- Graduate School of Pharmaceutical Sciences
- Osaka University
- Suita
- Japan
| | - Masahiro Egi
- School of Pharmaceutical Sciences
- University of Shizuoka
- Shizuoka
- Japan
| | - Shuji Akai
- Graduate School of Pharmaceutical Sciences
- Osaka University
- Suita
- Japan
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30
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Guajardo N, Müller CR, Schrebler R, Carlesi C, Domínguez de María P. Deep Eutectic Solvents for Organocatalysis, Biotransformations, and Multistep Organocatalyst/Enzyme Combinations. ChemCatChem 2015. [DOI: 10.1002/cctc.201501133] [Citation(s) in RCA: 107] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Nadia Guajardo
- Escuela de Ingeniería Química; Pontificia Universidad Católica de Valparaíso; Avda. Brasil 2147 Valparaíso Chile
| | - Christoph R. Müller
- Institut für Technische und Makromolekulare Chemie (ITMC); RWTH Aachen University; Worringer Weg 1 52074 Aachen Germany
| | - Rodrigo Schrebler
- Escuela de Ingeniería Química; Pontificia Universidad Católica de Valparaíso; Avda. Brasil 2147 Valparaíso Chile
| | - Carlos Carlesi
- Escuela de Ingeniería Química; Pontificia Universidad Católica de Valparaíso; Avda. Brasil 2147 Valparaíso Chile
| | - Pablo Domínguez de María
- Institut für Technische und Makromolekulare Chemie (ITMC); RWTH Aachen University; Worringer Weg 1 52074 Aachen Germany
- Sustainable Momentum, SL; Ap. Correos 3517 35004 Las Palmas de Gran Canaria, Canary Is. Spain
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31
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Recent Advances in Lipase-Mediated Preparation of Pharmaceuticals and Their Intermediates. Int J Mol Sci 2015; 16:29682-716. [PMID: 26690428 PMCID: PMC4691134 DOI: 10.3390/ijms161226191] [Citation(s) in RCA: 95] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 11/04/2015] [Accepted: 11/04/2015] [Indexed: 01/26/2023] Open
Abstract
Biocatalysis offers an alternative approach to conventional chemical processes for the production of single-isomer chiral drugs. Lipases are one of the most used enzymes in the synthesis of enantiomerically pure intermediates. The use of this type of enzyme is mainly due to the characteristics of their regio-, chemo- and enantioselectivity in the resolution process of racemates, without the use of cofactors. Moreover, this class of enzymes has generally excellent stability in the presence of organic solvents, facilitating the solubility of the organic substrate to be modified. Further improvements and new applications have been achieved in the syntheses of biologically active compounds catalyzed by lipases. This review critically reports and discusses examples from recent literature (2007 to mid-2015), concerning the synthesis of enantiomerically pure active pharmaceutical ingredients (APIs) and their intermediates in which the key step involves the action of a lipase.
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32
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Müller CR, Lavandera I, Gotor-Fernández V, Domínguez de María P. Performance of Recombinant-Whole-Cell-Catalyzed Reductions in Deep-Eutectic-Solvent-Aqueous-Media Mixtures. ChemCatChem 2015. [DOI: 10.1002/cctc.201500428] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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33
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34
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Aires-Trapote A, Hoyos P, Alcántara AR, Tamayo A, Rubio J, Rumbero A, Hernáiz MJ. Covalent Immobilization of Pseudomonas stutzeri Lipase on a Porous Polymer: An Efficient Biocatalyst for a Scalable Production of Enantiopure Benzoin Esters under Sustainable Conditions. Org Process Res Dev 2015. [DOI: 10.1021/op500326k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Antonio Aires-Trapote
- Department
of Organic and Pharmaceutical Chemistry, Faculty of Pharmacy, Complutense University of Madrid, Campus de Moncloa, 28040 Madrid, Spain
- Department
of Organic Chemistry, Faculty of Science, Autonoma University of Madrid, Campus de Cantoblanco, 28049 Madrid, Spain
| | - Pilar Hoyos
- Department
of Organic and Pharmaceutical Chemistry, Faculty of Pharmacy, Complutense University of Madrid, Campus de Moncloa, 28040 Madrid, Spain
| | - Andrés R. Alcántara
- Department
of Organic and Pharmaceutical Chemistry, Faculty of Pharmacy, Complutense University of Madrid, Campus de Moncloa, 28040 Madrid, Spain
| | - Aitana Tamayo
- Department
of Chemistry Physics of Surfaces and Processes, Instituto de Cerámica y Vidrio (CSIC), Kelsen, no. 5, 28049 Madrid, Spain
| | - Juan Rubio
- Department
of Chemistry Physics of Surfaces and Processes, Instituto de Cerámica y Vidrio (CSIC), Kelsen, no. 5, 28049 Madrid, Spain
| | - Angel Rumbero
- Department
of Organic Chemistry, Faculty of Science, Autonoma University of Madrid, Campus de Cantoblanco, 28049 Madrid, Spain
| | - María J. Hernáiz
- Department
of Organic and Pharmaceutical Chemistry, Faculty of Pharmacy, Complutense University of Madrid, Campus de Moncloa, 28040 Madrid, Spain
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