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de Matos IL, Nitschke M, Porto ALM. Regioselective and chemoselective biotransformation of 2′-hydroxychalcone derivatives by marine-derived fungi. BIOCATAL BIOTRANSFOR 2021. [DOI: 10.1080/10242422.2021.1956909] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Iara Lisboa de Matos
- Laboratory of Biocatalysis and Organic Synthesis, São Carlos Institute of Chemistry, University of São Paulo, São Carlos, Brazil
| | - Marcia Nitschke
- Laboratory of Microbial Biotechnology, São Carlos Institute of Chemistry, University of São Paulo, São Carlos, Brazil
| | - André Luiz Meleiro Porto
- Laboratory of Biocatalysis and Organic Synthesis, São Carlos Institute of Chemistry, University of São Paulo, São Carlos, Brazil
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dos Santos RAM, Reis AV, Pilau EJ, Porto C, Gonçalves JE, de Oliveira AJB, Gonçalves RAC. The headspace-GC/MS: Alternative methodology employed in the bioreduction of (4S)-(+)-carvone mediated by human skin fungus. BIOCATAL BIOTRANSFOR 2020. [DOI: 10.1080/10242422.2020.1743692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Rogério Aparecido Minini dos Santos
- Department of Pharmacy, University Center of Maringá – Unicesumar, Maringá, Brazil
- Department of Pharmacy, Graduate Program in Pharmaceutical Science, State University of Maringá – UEM, Maringá, Brazil
| | - Adriano Valim Reis
- Department of Pharmacy, Graduate Program in Pharmaceutical Science, State University of Maringá – UEM, Maringá, Brazil
| | | | - Carla Porto
- Program of Master in Science, Technology and Food Safety and Cesumar Institute of Science, Technology and Innovation – ICETI, Maringá, Brazil
| | - José Eduardo Gonçalves
- Program of Master in Science, Technology and Food Safety and Cesumar Institute of Science, Technology and Innovation – ICETI, Maringá, Brazil
- Program of Master in Clean Technology, University Center of Maringá – Unicesumar, Maringá, Brazil
| | - Arildo José Braz de Oliveira
- Department of Pharmacy, Graduate Program in Pharmaceutical Science, State University of Maringá – UEM, Maringá, Brazil
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Yan HD, Wang Z, Qian JQ. Efficient kinetic resolution of (RS
)-1-phenylethanol by a mycelium-bound lipase from a wild-type Aspergillus oryzae
strain. Biotechnol Appl Biochem 2016; 64:251-258. [DOI: 10.1002/bab.1484] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 02/01/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Hong-De Yan
- College of Biological and Environmental Engineering; Zhejiang University of Technology; Hangzhou People's Republic of China
| | - Zhao Wang
- College of Biological and Environmental Engineering; Zhejiang University of Technology; Hangzhou People's Republic of China
| | - Jun-Qing Qian
- College of Biological and Environmental Engineering; Zhejiang University of Technology; Hangzhou People's Republic of China
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Kisukuri CM, Andrade LH. Production of chiral compounds using immobilized cells as a source of biocatalysts. Org Biomol Chem 2015; 13:10086-107. [PMID: 26366634 DOI: 10.1039/c5ob01677k] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The importance of chiral compounds in all fields of technology and life sciences is shown. Small chiral molecules are mainly used as building blocks in the synthesis of more complex and functionalized compounds. Nature creates and imposes stereoselectivity by means of enzymes, which are highly efficient biocatalysts. The use of whole cells as a biocatalyst source is a promising strategy for avoiding some drawbacks associated with the use of pure enzymes, especially their high cost. The use of free cells is also challenging, since cell lysis can also occur under the reaction conditions. However, cell immobilization has been employed to increase the catalytic potential of enzymes by extending their lifetimes in organic solvents and non-natural environments. Besides, immobilized cells maintain their biocatalytic performance for several reaction cycles. Considering the above-mentioned arguments, several authors have synthesized different classes of chiral compounds such as alcohols, amines, carboxylic acids, amides, sulfides and lactones by means of immobilized cells. Our aim was to discuss the main aspects of the production of chiral compounds using immobilized cells as a source of biocatalysts, except under fermentation conditions.
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Affiliation(s)
- Camila M Kisukuri
- Universidade de São Paulo, Instituto de Química, Av. Prof. Lineu Prestes 748, SP 05508-900, São Paulo, Brazil.
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Wang XT, Yue DM, Zong MH, Lou WY. Use of Ionic Liquid To Significantly Improve Asymmetric Reduction of Ethyl Acetoacetate Catalyzed by Acetobacter sp. CCTCC M209061 Cells. Ind Eng Chem Res 2013. [DOI: 10.1021/ie401561r] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiao-Ting Wang
- Laboratory of Applied
Biocatalysis,
School of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, Guangdong,
People’s Republic of China
| | - Dong-Mei Yue
- Laboratory of Applied
Biocatalysis,
School of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, Guangdong,
People’s Republic of China
| | - Min-Hua Zong
- State Key Laboratory of Pulp
and Paper Engineering, South China University of Technology, Guangzhou 510640, Guangdong, People’s Republic of China
| | - Wen-Yong Lou
- Laboratory of Applied
Biocatalysis,
School of Light Industry and Food Sciences, South China University of Technology, Guangzhou 510640, Guangdong,
People’s Republic of China
- State Key Laboratory of Pulp
and Paper Engineering, South China University of Technology, Guangzhou 510640, Guangdong, People’s Republic of China
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Silva VD, Carletto JS, Carasek E, Stambuk BU, Nascimento MDG. Asymmetric reduction of (4S)-(+)-carvone catalyzed by baker's yeast: A green method for monitoring the conversion based on liquid–liquid–liquid microextraction with polypropylene hollow fiber membranes. Process Biochem 2013. [DOI: 10.1016/j.procbio.2013.05.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Chen L, Wei B, Zhang X, Li C. Bifunctional graphene/γ-Fe₂O₃ hybrid aerogels with double nanocrystalline networks for enzyme immobilization. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:2331-2340. [PMID: 23423944 DOI: 10.1002/smll.201202923] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/23/2012] [Indexed: 06/01/2023]
Abstract
Highly porous hosting materials with conducting (favorable to electron transfer) and magnetic (favorable to product separation) bicontinuous networks should possess great potentials for immobilization of various enzymes in the field of biocatalytic engineering, but the synthesis of such materials is still a great challenge. Herein, bifunctional graphene/γ-Fe2 O3 hybrid aerogels with quite low density (30-65 mg cm(-3) ), large specific surface area (270-414 m(2) g(-1) ), high electrical conductivity (0.5-5 × 10(-2) S m(-1) ), and superior saturation magnetization (23-54 emu g(-1) ) are fabricated. Single networks of either graphene aerogels or γ-Fe2 O3 aerogels are obtained by etching of the hybrid aerogels with acid solution or calcining of the hybrid aerogels in air, indicative of the double networks of the as-synthesized graphene/γ-Fe2 O3 hybrid aerogels for the first time. The resulting bifunctional aerogels are used to immobilize β-glucuronidase for biocatalytic transformation of glycyrrhizin into glycyrrhetinic acid monoglucuronide or glycyrrhetinic acid, with high biocatalytic activity and definite repeatability.
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Affiliation(s)
- Liang Chen
- School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, PR China
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Zhang BB, Cheng J, Lou WY, Wang P, Zong MH. Efficient anti-Prelog enantioselective reduction of acetyltrimethylsilane to (R)-1-trimethylsilylethanol by immobilized Candida parapsilosis CCTCC M203011 cells in ionic liquid-based biphasic systems. Microb Cell Fact 2012; 11:108. [PMID: 22897972 PMCID: PMC3527300 DOI: 10.1186/1475-2859-11-108] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Accepted: 06/27/2012] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND Biocatalytic asymmetric reductions with whole cells can offer high enantioselectivity, environmentally benign processes and energy-effective operations and thus are of great interest. The application of whole cell-mediated bioreduction is often restricted if substrate and product have low water solubility and/or high toxicity to the biocatalyst. Many studies have shown that a biphasic system is often useful in this instance. Hence, we developed efficient biphasic reaction systems with biocompatible water-immiscible ionic liquids (ILs), to improve the biocatalytic anti-Prelog enantioselective reduction of acetyltrimethylsilane (ATMS) to (R)-1-trimethylsilylethanol {(R)-1-TMSE}, which is key synthon for a large number of silicon-containing drugs, using immobilized Candida parapsilosis CCTCC M203011 cells as the biocatalyst. RESULTS It was found that the substrate ATMS and the product 1-TMSE exerted pronounced toxicity to immobilized Candida parapsilosis CCTCC M203011 cells. The biocompatible water-immiscible ILs can be applied as a substrate reservoir and in situ extractant for the product, thus greatly enhancing the efficiency of the biocatalytic process and the operational stability of the cells as compared to the IL-free aqueous system. Various ILs exerted significant but different effects on the bioreduction and the performances of biocatalysts were closely related to the kinds and combination of cation and anion of ILs. Among all the water-immiscible ILs investigated, the best results were observed in 1-butyl-3-methylimidazolium hexafluorophosphate (C(4)mim·PF(6))/buffer biphasic system. Furthermore, it was shown that the optimum substrate concentration, volume ratio of buffer to IL, buffer pH, reaction temperature and shaking rate for the bioreduction were 120 mM, 8/1 (v/v), 6.0, 30°C and 180 r/min, respectively. Under these optimized conditions, the initial reaction rate, the maximum yield and the product e.e. were 8.1 μmol/min g(cwm), 98.6% and >99%, respectively. The efficient whole-cell biocatalytic process was shown to be feasible on a 450-mL scale. Moreover, the immobilized cells remained around 87% of their initial activity even after being used repeatedly for 8 batches in the C(4)mim·PF(6)/buffer biphasic system, exhibiting excellent operational stability. CONCLUSIONS For the first time, we have successfully utilized immobilized Candida parapsilosis CCTCC M203011 cells, for efficiently catalyzing anti-Prelog enantioselective reduction of ATMS to enantiopure (R)-1-TMSE in the C(4)mim·PF(6)/buffer biphasic system. The substantially improved biocatalytic process appears to be effective and competitive on a preparative scale.
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Affiliation(s)
- Bo-Bo Zhang
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Jing Cheng
- Laboratory of Applied Biocatalysis, College of Light Industry and Food Sciences, South China University of Technology, Guangzhou, 510640, China
| | - Wen-Yong Lou
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China
- Laboratory of Applied Biocatalysis, College of Light Industry and Food Sciences, South China University of Technology, Guangzhou, 510640, China
| | - Pan Wang
- Laboratory of Applied Biocatalysis, College of Light Industry and Food Sciences, South China University of Technology, Guangzhou, 510640, China
| | - Min-Hua Zong
- Laboratory of Applied Biocatalysis, College of Light Industry and Food Sciences, South China University of Technology, Guangzhou, 510640, China
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Gao G, Bai XF, Li F, Zheng LS, Zheng ZJ, Lai GQ, Jiang K, Li F, Xu LW. A Lewis acid-promoted reduction of acylsilanes to α-hydroxysilanes by diethylzinc. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.02.059] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Ou Z, Chen X, Ying G, Shi H, Sun X. Continuous preparation of (S)-3-hydroxy-3-phenylpropionate by asymmetric reduction of 3-oxo-3-phenylpropionic acid ethyl ester with Saccharomyces cerevisiae CGMCC No.2266 in a membrane reactor. BIOTECHNOL BIOPROC E 2011. [DOI: 10.1007/s12257-010-0214-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Abas F, Uzir M, Zahar M. Effect of pH on the Biotransformation of (R)-1-(4-bromo-phenyl)-ethanol by using Aspergillus niger as Biocatalyst. ACTA ACUST UNITED AC 2010. [DOI: 10.3923/jas.2010.3289.3294] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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He DM, Kaleem I, Qin SY, Dai DZ, Liu GY, Li C. Biosynthesis of glycyrrhetic acid 3-O-mono-β-d-glucuronide catalyzed by β-d-glucuronidase with enhanced bond selectivity in an ionic liquid/buffer biphasic system. Process Biochem 2010. [DOI: 10.1016/j.procbio.2010.03.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Chen X, Ou Z, Ying G. Kinetic model of asymmetric reduction of 3-oxo-3-phenylpropionic acid ethyl ester using Saccharomyces cerevisiae CGMCC No.2266. KOREAN J CHEM ENG 2010. [DOI: 10.1007/s11814-010-0307-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Efficient chemoselective biohydrogenation of 1,3-diaryl-2-propen-1-ones catalyzed by Saccharomyces cerevisiae yeasts in biphasic system. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.molcatb.2010.01.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Lou WY, Chen L, Zhang BB, Smith TJ, Zong MH. Using a water-immiscible ionic liquid to improve asymmetric reduction of 4-(trimethylsilyl)-3-butyn-2-one catalyzed by immobilized Candida parapsilosis CCTCC M203011 cells. BMC Biotechnol 2009; 9:90. [PMID: 19849833 PMCID: PMC2790445 DOI: 10.1186/1472-6750-9-90] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2009] [Accepted: 10/22/2009] [Indexed: 12/02/2022] Open
Abstract
Background Whole cells are usually employed for biocatalytic reduction reactions to ensure efficient coenzyme regeneration and to avoid problems with enzyme purification and stability. The efficiency of whole cell-catalyzed bioreduction is frequently restricted by pronounced toxicity of substrate and/or product to the microbial cells and in many instances the use of two-phase reaction systems can solve such problems. Therefore, we developed new, biphasic reaction systems with biocompatible water-immiscible ionic liquids (ILs) as alternatives to conventional organic solvents, in order to improve the asymmetric reduction of 4-(trimethylsilyl)-3-butyn-2-one (TMSB) to (S)-4-(trimethylsilyl)-3-butyn-2-ol {(S)-TMSBOL}, a key intermediate for synthesis of 5-lipoxygenase inhibitors, using immobilized Candida parapsilosis CCTCC M203011 cells as the biocatalyst. Results Various ILs exerted significant but different effects on the bioreduction. Of all the tested water-immiscible ILs, the best results were observed with 1-butyl-3-methylimidazolium hexafluorophosphate (C4MIM·PF6), which exhibited not only good biocompatibility with the cells but also excellent solvent properties for the toxic substrate and product, thus markedly improving the efficiency of the bioreduction and the operational stability of the cells as compared to the IL-free aqueous system. 2-Propanol was shown to be the most suitable co-substrate for coenzyme regeneration, and it was found that the optimum volume ratio of buffer to C4MIM·PF6, substrate concentration, buffer pH, 2-propanol concentration and reaction temperature were 4/1 (v/v), 24 mM, 5.5, 130 mM and 30°C, respectively. Under these optimized conditions, the maximum yield and the product e.e. wer 97.7% and >99%, respectively, which are much higher than the corresponding values previously reported. The efficient whole-cell biocatalytic process was shown to be feasible on a 250-mL scale. Conclusion The whole cell-catalyzed asymmetric reduction of TMSB to (S)-TMSBOL can be substantially improved by using a C4MIM·PF6/buffer biphasic system instead of a single-phase aqueous system and the resulting biocatalytic process appears to be effective and competitive on a preparative scale.
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Affiliation(s)
- Wen-Yong Lou
- State Key Laboratory of Pulp and Paper Engineering, College of Light Industry & Food Sciences, South China University of Technology, Guangzhou 510640, PR China.
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XIAO M, YE J, ZHANG Y, HUANG Y. Reaction Characteristics of Asymmetric Synthesis of (2S,5S)-2,5-Hexanediol Catalyzed with Baker's Yeast Number 6. Chin J Chem Eng 2009. [DOI: 10.1016/s1004-9541(08)60236-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Wang W, Zong MH, Lou WY. Use of an ionic liquid to improve asymmetric reduction of 4′-methoxyacetophenone catalyzed by immobilized Rhodotorula sp. AS2.2241 cells. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.molcatb.2008.05.010] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Zhang BB, Lou WY, Zong MH, Wu H. Efficient synthesis of enantiopure (S)-4-(trimethylsilyl)-3-butyn-2-ol via asymmetric reduction of 4-(trimethylsilyl)-3-butyn-2-one with immobilized Candida parapsilosis CCTCC M203011 cells. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.molcatb.2007.12.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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ZHANG F, NI Y, SUN Z, ZHENG P, LIN W, ZHU P, JU N. Asymmetric Reduction of Ethyl 4-Chloro-3-oxobutanoate to Ethyl (S)-4-Chloro-3-hydroxybutanoate Catalyzed by Aureobasidium pullulans in an Aqueous/Ionic Liquid Biphase System. CHINESE JOURNAL OF CATALYSIS 2008. [DOI: 10.1016/s1872-2067(08)60051-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Arai N, Suzuki K, Sugizaki S, Sorimachi H, Ohkuma T. Asymmetric hydrogenation of aromatic, aliphatic, and alpha,beta-unsaturated acyl silanes catalyzed by Tol-binap/Pica ruthenium(II) complexes: practical synthesis of optically active alpha-hydroxysilanes. Angew Chem Int Ed Engl 2008; 47:1770-3. [PMID: 18213562 DOI: 10.1002/anie.200704696] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Noriyoshi Arai
- Division of Chemical Process Engineering, Graduate School of Engineering, Hokkaido University, Sapporo 060-8628, Japan
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Arai N, Suzuki K, Sugizaki S, Sorimachi H, Ohkuma T. Asymmetric Hydrogenation of Aromatic, Aliphatic, and α,β-Unsaturated Acyl Silanes Catalyzed by Tol-binap/Pica Ruthenium(II) Complexes: Practical Synthesis of Optically Active α-Hydroxysilanes. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200704696] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Li YN, Shi XA, Zong MH, Meng C, Dong YQ, Guo YH. Asymmetric reduction of 2-octanone in water/organic solvent biphasic system with Baker's yeast FD-12. Enzyme Microb Technol 2007. [DOI: 10.1016/j.enzmictec.2006.10.016] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Shi XA, Zong MH, Lou WY. Effect of Ionic Liquids on Catalytic Characteristics of Horse Liver Alcohol Dehydrogenase. CHINESE J CHEM 2006. [DOI: 10.1002/cjoc.200690307] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Xu Z, Fang L, Lin J, Jiang X, Liu Y, Cen P. Efficient bioreduction of ethyl 4-chloro-3-oxobutanoate to (S)-4-chloro-3-hydrobutanoate by whole cells ofCandida magnoliae in water/n-butyl acetate two-phase system. BIOTECHNOL BIOPROC E 2006. [DOI: 10.1007/bf02931868] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lou WY, Zong MH. Efficient kinetic resolution of (R,S)-1-trimethylsilylethanol via lipase-mediated enantioselective acylation in ionic liquids. Chirality 2006; 18:814-21. [PMID: 16917836 DOI: 10.1002/chir.20307] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Efficient enantioselective acylation of (R,S)-1-trimethylsilylethanol {(R,S)-1-TMSE} with vinyl acetate catalyzed by immobilized lipase from Candida antarctica B (i.e., Novozym 435) was successfully conducted in ionic liquids (ILs). A remarkable enhancement in the initial rate and the enantioselectivity of the acylation was observed by using ILs as the reaction media when compared to the organic solvents tested. Also, the activity, enantioselectivity, and thermostability of Novozym 435 increased with increasing hydrophobicity of ILs. Of the six ILs examined, the IL C4MIm.PF6 gave the fastest initial rate and the highest enantioselectivity, and was consequently chosen as the favorable medium for the reaction. The optimal molar ratio of vinyl acetate to (R,S)-1-TMSE, water activity, and reaction temperature range were 4:1, 0.75, and 40 -50 degrees C, respectively, under which the initial rate and the enantioselectivity (E value) were 27.6 mM/h and 149, respectively. After a reaction time of 6 h, the ee of the remaining (S)-1-TMSE reached 97.1% at the substrate conversion of 50.7%. Additionally, Novozym 435 was effectively recycled and reused in C4MIm.PF6 for five consecutive runs without substantial lose in activity and enantioselectivity. The preparative scale kinetic resolution of (R,S)-1-TMSE in C4MIm.PF6 is shown to be very promising and useful for the industrial production of enantiopure (S)-1-TMSE.
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Affiliation(s)
- Wen-Yong Lou
- Laboratory of Applied Biocatalysis, College of Biological Sciences & Biotechnology, South China University of Technology, Guangzhou, China
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Current awareness on yeast. Yeast 2005. [PMID: 15773059 PMCID: PMC7169799 DOI: 10.1002/yea.1158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In order to keep subscribers up‐to‐date with the latest developments in their field, this current awareness service is provided by John Wiley & Sons and contains newly‐published material on yeasts. Each bibliography is divided into 10 sections. 1 Books, Reviews & Symposia; 2 General; 3 Biochemistry; 4 Biotechnology; 5 Cell Biology; 6 Gene Expression; 7 Genetics; 8 Physiology; 9 Medical Mycology; 10 Recombinant DNA Technology. Within each section, articles are listed in alphabetical order with respect to author. If, in the preceding period, no publications are located relevant to any one of these headings, that section will be omitted. (4 weeks journals ‐ search completed 10th. Nov. 2004)
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