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Boulos J, Goc F, Vandenbrouck T, Perret N, Dhainaut J, Royer S, Rataboul F. Carbon-Supported Ru-Ni and Ru-W Catalysts for the Transformation of Hydroxyacetone and Saccharides into Glycol-Derived Primary Amines. CHEMSUSCHEM 2024; 17:e202400540. [PMID: 38572685 DOI: 10.1002/cssc.202400540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Revised: 04/04/2024] [Accepted: 04/04/2024] [Indexed: 04/05/2024]
Abstract
Nitrogen-containing molecules are used for the synthesis of polymers, surfactants, agrochemicals, and dyes. In the context of green chemistry, it is important to form such compounds from bioresource. Short-chain primary amines are of interest for the polymer industry, like 2-aminopropanol, 1-aminopropan-2-ol, and 1,2-diaminopropane. These amines can be formed through the amination of oxygenated substrates, preferably in aqueous phase. This is possible with heterogeneous catalysts, however, effective systems that allow reactions under mild conditions are lacking. We report an efficient catalyst Ru-Ni/AC for the reductive amination of hydroxyacetone into 2-aminopropanol. The catalyst has been reused during 3 cycles demonstrating a good stability. As a prospective study, extension to the reactivity of (poly)carbohydrates has been realized. Despite a lesser efficiency, 2-aminopropanol (9 % yield of amines) has been formed from fructose, the first example from a carbohydrate. This was possible using a 7.5 %Ru-36 %WxC/AC catalyst, composition allowing a one-pot retro-aldol cleavage into hydroxyacetone and reductive amination. The transformation of cellulose through sequential reactions with a combination of 30 %W2C/AC and 7.5 %Ru-36 %WxC/AC system gave 2 % of 2-aminopropanol, corresponding to the first example of the formation of this amine from cellulose with heterogeneous catalysts.
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Affiliation(s)
- Joseph Boulos
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, Unité de Catalyse et de Chimie du Solide, UMR 8181, 59000, Lille, France
| | - Firat Goc
- Univ Lyon 1, CNRS, Institut de Recherches sur la Catalyse et l'Environnement de Lyon, UMR 5256, 2 avenue Albert Einstein, 69626, Villeurbanne, France
| | - Tom Vandenbrouck
- Univ Lyon 1, CNRS, Institut de Recherches sur la Catalyse et l'Environnement de Lyon, UMR 5256, 2 avenue Albert Einstein, 69626, Villeurbanne, France
| | - Noémie Perret
- Univ Lyon 1, CNRS, Institut de Recherches sur la Catalyse et l'Environnement de Lyon, UMR 5256, 2 avenue Albert Einstein, 69626, Villeurbanne, France
| | - Jérémy Dhainaut
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, Unité de Catalyse et de Chimie du Solide, UMR 8181, 59000, Lille, France
| | - Sébastien Royer
- Univ. Lille, CNRS, Centrale Lille, Univ. Artois, Unité de Catalyse et de Chimie du Solide, UMR 8181, 59000, Lille, France
| | - Franck Rataboul
- Univ Lyon 1, CNRS, Institut de Recherches sur la Catalyse et l'Environnement de Lyon, UMR 5256, 2 avenue Albert Einstein, 69626, Villeurbanne, France
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Wibowo H, Ketwong T, Cholwatthanatanakorn N, Ding L, Areeprasert C. Production of bagasse fly ash-derived CO 2 adsorbent by physical activation and by nitrogen-functionalization using hydrothermal treatment. WASTE MANAGEMENT (NEW YORK, N.Y.) 2024; 177:66-75. [PMID: 38290349 DOI: 10.1016/j.wasman.2024.01.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 01/08/2024] [Accepted: 01/15/2024] [Indexed: 02/01/2024]
Abstract
The high cost of commercial CO2 capture material is one of the issues hindering the widespread adaptation of the technology. This study explored efficient ways of utilizing waste material in the form of bagasse fly ash (BFA) as CO2 adsorbent through thermochemical preparations of physical activation, and hydrothermal carbonization (HTC). The activation of BFA using flue gas was able to produce an adsorbent with good CO2 adsorption capacity, with similar results to the CO2 activation. The second approach using co-HTC of BFA with chicken manure (CM) optimized using Box-Behnken design of experiment was able to produce an adsorbent with CO2 adsorption capacity nearly on-par with commercial adsorbents. It was also found that the model was able to accurately predict the experiment outcome when verified with the additional experiments. Material characterizations showed that the increase of the CO2 adsorption capacity of the adsorbent might have been achieved through the formation of secondary amines deposited on the BFA. The results of this study showed that the utilization of waste in the form of BFA and CM could contribute to the advancement of circular and low-cost CO2 capture medium from waste materials, which could increase the adaptation and involvement of sugar industry and poultry farm.
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Affiliation(s)
- Haryo Wibowo
- Department of Mechanical Engineering, Faculty of Engineering, Kasetsart University, 50 Ngam Wong Wan Road, Lat Yao, Chatuchak, Bangkok 10900, Thailand
| | - Tulakarn Ketwong
- Department of Mechanical Engineering, Faculty of Engineering, Kasetsart University, 50 Ngam Wong Wan Road, Lat Yao, Chatuchak, Bangkok 10900, Thailand
| | - Natchapon Cholwatthanatanakorn
- Department of Mechanical Engineering, Faculty of Engineering, Kasetsart University, 50 Ngam Wong Wan Road, Lat Yao, Chatuchak, Bangkok 10900, Thailand
| | - Lu Ding
- Institute of Clean Coal Technology, East China University of Science and Technology, Shanghai 200237, PR China
| | - Chinnathan Areeprasert
- Department of Mechanical Engineering, Faculty of Engineering, Kasetsart University, 50 Ngam Wong Wan Road, Lat Yao, Chatuchak, Bangkok 10900, Thailand.
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3
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Il'in MV, Safinskaya YV, Polonnikov DA, Novikov AS, Bolotin DS. Chalcogen- and Halogen-Bond-Donating Cyanoborohydrides Provide Imine Hydrogenation. J Org Chem 2024; 89:2916-2925. [PMID: 38373196 DOI: 10.1021/acs.joc.3c02282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
Sulfonium, selenonium, telluronium, and iodonium cyanoborohydrides have been synthesized, isolated, and fully characterized by various methods, including single-crystal X-ray diffraction (XRD) analysis. The quantum theory of atoms in molecules' analysis based on the XRD data indicated that the hydride···σ-hole short contacts observed in the crystal structures of each compound have a purely noncovalent nature. The telluronium and iodonium cyanoborohydrides provide a significantly higher rate of the model reaction of imine hydrogenation compared with sodium and tetrabutylammonium cyanoborohydrides. Based on the NMR and high-resolution electrospray ionization mass spectrometry data indicating that the reaction progress is accompanied by the cation reduction, a mechanism involving intermediate formation of elusive onium hydrides has been proposed as an alternative to conventional electrophilic activation of the imine moiety by its ligation to the cation's σ-hole.
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Affiliation(s)
- Mikhail V Il'in
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, Saint Petersburg 199034, Russian Federation
| | - Yana V Safinskaya
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, Saint Petersburg 199034, Russian Federation
| | - Denis A Polonnikov
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, Saint Petersburg 199034, Russian Federation
| | - Alexander S Novikov
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, Saint Petersburg 199034, Russian Federation
| | - Dmitrii S Bolotin
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya Nab. 7/9, Saint Petersburg 199034, Russian Federation
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Recent Advances in the Efficient Synthesis of Useful Amines from Biomass-Based Furan Compounds and Their Derivatives over Heterogeneous Catalysts. Catalysts 2023. [DOI: 10.3390/catal13030528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023] Open
Abstract
Bio-based furanic oxygenates represent a well-known class of lignocellulosic biomass-derived platform molecules. In the presence of H2 and different nitrogen sources, these versatile building blocks can be transformed into valuable amine compounds via reductive amination or hydrogen-borrowing amination mechanisms, yet they still face many challenges due to the co-existence of many side-reactions, such as direct hydrogenation, polymerization and cyclization. Hence, catalysts with specific structures and functions are required to achieve satisfactory yields of target amines. In recent years, heterogeneous catalytic synthesis of amines from bio-based furanic oxygenates has received extensive attention. In this review, we summarize and discuss the recent significant progress in the generation of useful amines from bio-based furanic oxygenates with H2 and different nitrogen sources over heterogeneous catalysts, according to various raw materials and reaction pathways. The key factors affecting catalytic performances, such as active metals, supports, promoters, reaction solvents and conditions, as well as the possible reaction routes and catalytic reaction mechanisms are studied and discussed in depth. Special attention is paid to the structure–activity relationship, which would be helpful for the development of more efficient and stable heterogeneous catalysts. Moreover, the future research direction and development trend of the efficient synthesis for bio-based amines are prospected.
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Bucciol F, Gaudino EC, Villa A, Valsania MC, Cravotto G, Manzoli M. Microwave‐Assisted Reductive Amination of Aldehydes and Ketones Over Rhodium‐Based Heterogeneous Catalysts. Chempluschem 2023; 88:e202300017. [DOI: 10.1002/cplu.202300017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 03/08/2023] [Indexed: 03/29/2023]
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Yang S, Silverman SK. Defining the substrate scope of DNAzyme catalysis for reductive amination with aliphatic amines. Org Biomol Chem 2023; 21:1910-1919. [PMID: 36786764 DOI: 10.1039/d3ob00070b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Amines can be alkylated using various reactions, such as reductive amination of aldehydes. In this study, we sought DNAzymes as catalytic DNA sequences that promote reductive amination with aliphatic amines, including DNA-anchored peptide substrates with lysine residues. By in vitro selection starting with either N40 or N20 random DNA pools, we identified many DNAzymes that catalyze reductive amination between the DNA oligonucleotide-anchored aliphatic amino group of DNA-C3-NH2 (C3 = short three-carbon tether) and a DNA-anchored benzaldehyde group in the presence of NaCNBH3 as reducing agent. At pH 5.2, 6.0, 7.5, or 9.0 in the presence of various divalent metal ion cofactors including Mg2+, Mn2+, Zn2+ and Ni2+, the DNAzymes have kobs up to 0.12 h-1 and up to 130-fold rate enhancement relative to the DNA-splinted but uncatalyzed background reaction. However, analogous selection experiments did not lead to any DNAzymes that function with DNA-HEG-NH2 [HEG = long hexa(ethylene glycol) tether], or with short- and long-tethered DNA-AAAKAA and DNA-HEG-AAAKAA lysine-containing hexapeptide substrates (A = alanine, K = lysine). Including a variety of other amino acids in place of the neighboring alanines also did not lead to DNAzymes. These findings establish a practical limit on the substrate scope of DNAzyme catalysis for N-alkylation of aliphatic amines by reductive amination. The lack of DNAzymes for reductive amination with any substrate more structurally complex than DNA-C3-NH2 is likely related to the challenge in binding and spatially organizing those other substrates. Because other reactions such as aliphatic amine N-acylation are feasible for DNAzymes with DNA-anchored peptides, our findings show that the ability to identify DNAzymes depends strongly on both the investigated reaction and the composition of the substrate.
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Affiliation(s)
- Shukun Yang
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, IL 61801, USA.
| | - Scott K Silverman
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 South Mathews Avenue, Urbana, IL 61801, USA.
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Truong CC, Mishra DK, Suh YW. Recent Catalytic Advances on the Sustainable Production of Primary Furanic Amines from the One-Pot Reductive Amination of 5-Hydroxymethylfurfural. CHEMSUSCHEM 2023; 16:e202201846. [PMID: 36354122 DOI: 10.1002/cssc.202201846] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 11/10/2022] [Indexed: 06/16/2023]
Abstract
5-Hydroxymethylfurfural (5-HMF) represents a well-known class of lignocellulosic biomass-derived platform molecules. With the presence of many reactive functional groups in the structure, this versatile building block could be valorized into many value-added products. Among well-established catalytic transformations in biorefinery, the reductive amination is of particular interest to provide valuable N-containing compounds. Specifically, the reductive amination of 5-HMF with ammonia (NH3 ) and molecular hydrogen (H2 ) offers a straightforward and sustainable access to primary furanic amines [i. e., 5-hydroxymethyl-2-furfuryl amine (HMFA) and 2,5-bis(aminomethyl)furan (BAMF)], which display far-reaching utilities in pharmaceutical, chemical, and polymer industries. In the presence of heterogeneous catalysts contanining monometals (Ni, Co, Ru, Pd, Pt, and Rh) or bimetals (Ni-Cu and Ni-Mn), this elegant pathway enables a high-yielding and chemoselective production of HMFA/BAMF compared to other synthetic routes. This Review aims to present an up-to-date highlight on the supported metal-catalyzed reductive amination of 5-HMF with elaborate studies on the role of metal, solid support, and reaction parameters. Besides, the recyclability/adaptability of catalysts as well as the reaction mechanism are also provided to give valuable insights into this potential 5-HMF valorization strategy.
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Affiliation(s)
- Cong Chien Truong
- Faculty of Education and Research Promotion, University of Toyama, Toyama, 930-8555, Japan
| | - Dinesh Kumar Mishra
- Center for Creative Convergence Education, Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
- Research Institute of Industrial Science (RIIS), Hanyang University, Seoul, 04763, Republic of Korea
| | - Young-Woong Suh
- Research Institute of Industrial Science (RIIS), Hanyang University, Seoul, 04763, Republic of Korea
- Department of Chemical Engineering, Hanyang University, Seoul, 04763, Republic of Korea
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8
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Velty A, Iborra S, Corma A. Synthetic Routes for Designing Furanic and Non Furanic Biobased Surfactants from 5-Hydroxymethylfurfural. CHEMSUSCHEM 2022; 15:e202200181. [PMID: 35325511 PMCID: PMC9401603 DOI: 10.1002/cssc.202200181] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 03/21/2022] [Indexed: 06/14/2023]
Abstract
5-hydroxymethylfurfural (HMF) is one of the most valuable biomass platform molecules, enabling the construction of a plethora of high value-added furanic compounds. In particular, in the last decade, HMF has been considered as a starting material for designing biobased surfactants, not only because of its renewability and carbon footprint, but also because of its enhanced biodegradability. This Review presents recent examples of the different approaches to link the hydrophilic and lipophilic moieties into the hydrophobic furan (and tetrahydrofuran) ring, giving a variety of biobased surfactants that have been classified here according to the charge of the head polar group. Moreover, strategies for the synthesis of different non-furanic structures surfactant molecules (such as levulinic acid, cyclopentanols, and aromatics) derived from HMF are described. The new HMF-based amphiphilic molecules presented here cover a wide range of hydrophilic-lipophilic balance values and have suitable surfactant properties such as surface tension activity and critical micelle concentration, to be an important alternative for the replacement of non-sustainable surfactants.
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Affiliation(s)
- Alexandra Velty
- Instituto de Tecnología QuímicaUniversitat Politècnica de ValènciaConsejo Superior de Investigaciones CientíficasAvenida de los Naranjos s/nValenciaE-46022Spain
| | - Sara Iborra
- Instituto de Tecnología QuímicaUniversitat Politècnica de ValènciaConsejo Superior de Investigaciones CientíficasAvenida de los Naranjos s/nValenciaE-46022Spain
| | - Avelino Corma
- Instituto de Tecnología QuímicaUniversitat Politècnica de ValènciaConsejo Superior de Investigaciones CientíficasAvenida de los Naranjos s/nValenciaE-46022Spain
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9
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Gimferrer M, Joly N, Escayola S, Viñas E, Gaillard S, Solà M, Renaud JL, Salvador P, Poater A. Knölker Iron Catalysts for Hydrogenation Revisited: A Nonspectator Solvent and Fine-Tuning. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00099] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Martí Gimferrer
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, c/Ma̲ Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Nicolas Joly
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, c/Ma̲ Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
- Normandie Univ, LCMT, ENSICAEN, UNICAEN, CNRS, 6 boulevard du Maréchal Juin, 14000 Caen, France
| | - Sílvia Escayola
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, c/Ma̲ Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
- Donostia International Physics Center (DIPC), Manuel Lardizabal Ibilbidea 4, 20018 Donostia, Euskadi, Spain
| | - Eduard Viñas
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, c/Ma̲ Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Sylvain Gaillard
- Normandie Univ, LCMT, ENSICAEN, UNICAEN, CNRS, 6 boulevard du Maréchal Juin, 14000 Caen, France
| | - Miquel Solà
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, c/Ma̲ Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Jean-Luc Renaud
- Normandie Univ, LCMT, ENSICAEN, UNICAEN, CNRS, 6 boulevard du Maréchal Juin, 14000 Caen, France
| | - Pedro Salvador
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, c/Ma̲ Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
| | - Albert Poater
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de Girona, c/Ma̲ Aurèlia Capmany 69, 17003 Girona, Catalonia, Spain
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Xu M, Hua Y, Fu X, Liu J. Efficient Photocatalytic Carbonyl Alkylative Amination Enabled by Titanium‐Dioxide‐Mediated Decarboxylation. Chemistry 2022; 28:e202104394. [DOI: 10.1002/chem.202104394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Indexed: 11/11/2022]
Affiliation(s)
- Mei Xu
- College of Chemistry and Chemical Engineering Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology Hunan University 410082 Changsha P.R. China
| | - Ying Hua
- College of Chemistry and Chemical Engineering Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology Hunan University 410082 Changsha P.R. China
| | - Xin Fu
- College of Chemistry and Chemical Engineering Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology Hunan University 410082 Changsha P.R. China
| | - Jie Liu
- College of Chemistry and Chemical Engineering Hunan Provincial Key Laboratory of Biomacromolecular Chemical Biology Hunan University 410082 Changsha P.R. China
- State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan University 410082 Changsha P.R. China
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11
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Zhang M, Liu J, Yang B, Ma L, Wang N, Wei X. Facile Synthesis of a Novel Heterogeneous Rh/COF Catalyst and Its Application in Tandem Selective Transfer Hydrogenation and Monomethylation of Nitro Compounds with Methanol. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c04156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Mingyue Zhang
- Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, P. R. China
- University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Jianguo Liu
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, P. R. China
| | - Bo Yang
- Guangzhou Special Pressure Equipment Inspection and Research Institute, 9 Keyan Road, Guangzhou 510663, P. R. China
| | - Longlong Ma
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, P. R. China
| | - Nan Wang
- Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, P. R. China
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, P. R. China
| | - Xiuzhi Wei
- Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, P. R. China
- Department of Engineering Science, University of Science and Technology of China, Hefei 230026, P. R. China
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12
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Gilio AK, Thorpe TW, Turner N, Grogan G. Reductive aminations by imine reductases: from milligrams to tons. Chem Sci 2022; 13:4697-4713. [PMID: 35655886 PMCID: PMC9067572 DOI: 10.1039/d2sc00124a] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Accepted: 04/06/2022] [Indexed: 12/22/2022] Open
Abstract
The synthesis of secondary and tertiary amines through the reductive amination of carbonyl compounds is one of the most significant reactions in synthetic chemistry. Asymmetric reductive amination for the formation of chiral amines, which are required for the synthesis of pharmaceuticals and other bioactive molecules, is often achieved through transition metal catalysis, but biocatalytic methods of chiral amine production have also been a focus of interest owing to their selectivity and sustainability. The discovery of asymmetric reductive amination by imine reductase (IRED) and reductive aminase (RedAm) enzymes has served as the starting point for a new industrial approach to the production of chiral amines, leading from laboratory-scale milligram transformations to ton-scale reactions that are now described in the public domain. In this perspective we trace the development of the IRED-catalyzed reductive amination reaction from its discovery to its industrial application on kg to ton scale. In addition to surveying examples of the synthetic chemistry that has been achieved with the enzymes, the contribution of structure and protein engineering to the understanding of IRED-catalyzed reductive amination is described, and the consequent benefits for activity, selectivity and stability in the design of process suitable catalysts. IRED-catalyzed reductive aminations have progressed from mg to ton scale, through advances in enzyme discovery, protein engineering and process biocatalysis.![]()
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Affiliation(s)
- Amelia K. Gilio
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
| | - Thomas W. Thorpe
- School of Chemistry, University of Manchester, Manchester Institute of Biotechnology, 131 Princess Street, Manchester, M1 7DN, UK
| | - Nicholas Turner
- School of Chemistry, University of Manchester, Manchester Institute of Biotechnology, 131 Princess Street, Manchester, M1 7DN, UK
| | - Gideon Grogan
- Department of Chemistry, University of York, Heslington, York YO10 5DD, UK
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