1
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Deiana L, Rafi AA, Bäckvall JE, Córdova A. Subtilisin integrated artificial plant cell walls as heterogeneous catalysts for asymmetric synthesis of ( S)-amides. RSC Adv 2023; 13:19975-19980. [PMID: 37404321 PMCID: PMC10316683 DOI: 10.1039/d3ra02193a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 06/19/2023] [Indexed: 07/06/2023] Open
Abstract
Subtilisin integrated artificial plant-cell walls (APCWs) were fabricated by self-assembly using cellulose or nanocellulose as the main component. The resulting APCW catalysts are excellent heterogeneous catalysts for the asymmetric synthesis of (S)-amides. This was demonstrated by the APCW-catalyzed kinetic resolution of several racemic primary amines to give the corresponding (S)-amides in high yields with excellent enantioselectivity. The APCW catalyst can be recycled for multiple reaction cycles without loss of enantioselectivity. The assembled APCW catalyst was also able to cooperate with a homogeneous organoruthenium complex, which allowed for the co-catalytic dynamic kinetic resolution (DKR) of a racemic primary amine to give the corresponding (S)-amide in high yield. The APCW/Ru co-catalysis constitutes the first examples of DKR of chiral primary amines when subtilisin is used as a co-catalyst.
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Affiliation(s)
- Luca Deiana
- Department of Natural Sciences, Mid Sweden University Holmgatan 10 Sundsvall 85179 Sweden
| | - Abdolrahim A Rafi
- Department of Natural Sciences, Mid Sweden University Holmgatan 10 Sundsvall 85179 Sweden
| | - Jan-E Bäckvall
- Department of Natural Sciences, Mid Sweden University Holmgatan 10 Sundsvall 85179 Sweden
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University Stockholm SE-10691 Sweden
| | - Armando Córdova
- Department of Natural Sciences, Mid Sweden University Holmgatan 10 Sundsvall 85179 Sweden
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2
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Deiana L, Rafi AA, Naidu VR, Tai CW, Bäckvall JE, Córdova A. Artificial plant cell walls as multi-catalyst systems for enzymatic cooperative asymmetric catalysis in non-aqueous media. Chem Commun (Camb) 2021; 57:8814-8817. [PMID: 34382975 DOI: 10.1039/d1cc02878b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The assembly of cellulose-based artificial plant cell wall (APCW) structures that contain different types of catalysts is a powerful strategy for the development of cascade reactions. Here we disclose an APCW catalytic system containing a lipase enzyme and nanopalladium particles that transform a racemic amine into the corresponding enantiomerically pure amide in high yield via a dynamic kinetic resolution.
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Affiliation(s)
- Luca Deiana
- Department of Natural Sciences, Mid Sweden University, Holmgatan 10, 85 179 Sundsvall, Sweden.
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3
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Gustafson KPJ, Guðmundsson A, Bajnóczi ÉG, Yuan N, Zou X, Persson I, Bäckvall JE. In Situ Structural Determination of a Homogeneous Ruthenium Racemization Catalyst and Its Activated Intermediates Using X-Ray Absorption Spectroscopy. Chemistry 2020; 26:3411-3419. [PMID: 31976570 PMCID: PMC7155078 DOI: 10.1002/chem.201905479] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Indexed: 12/30/2022]
Abstract
The activation process of a known Ru‐catalyst, dicarbonyl(pentaphenylcyclopentadienyl)ruthenium chloride, has been studied in detail using time resolved in situ X‐ray absorption spectroscopy. The data provide bond lengths of the species involved in the process as well as information about bond formation and bond breaking. On addition of potassium tert‐butoxide, the catalyst is activated and an alkoxide complex is formed. The catalyst activation proceeds via a key acyl intermediate, which gives rise to a complete structural change in the coordination environment around the Ru atom. The rate of activation for the different catalysts was found to be highly dependent on the electronic properties of the cyclopentadienyl ligand. During catalytic racemization of 1‐phenylethanol a fast‐dynamic equilibrium was observed.
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Affiliation(s)
- Karl P J Gustafson
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden.,Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden.,Present address: Borregaard, P.O. Box 162, 1701, Sarpsborg, Norway
| | - Arnar Guðmundsson
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden
| | - Éva G Bajnóczi
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, P.O. Box 7015, 75007, Uppsala, Sweden.,Present address: Wigner Research Centre for Physics, Konkoly-Thege Miklós út 29-33, 1121, Budapest, Hungary
| | - Ning Yuan
- Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden.,Department of Molecular Sciences, Swedish University of Agricultural Sciences, P.O. Box 7015, 75007, Uppsala, Sweden
| | - Xiaodong Zou
- Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden
| | - Ingmar Persson
- Department of Molecular Sciences, Swedish University of Agricultural Sciences, P.O. Box 7015, 75007, Uppsala, Sweden
| | - Jan-E Bäckvall
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 10691, Stockholm, Sweden
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4
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Cen Y, Li D, Xu J, Wu Q, Wu Q, Lin X. Highly Focused Library‐Based Engineering of
Candida antarctica
Lipase B with (
S
)‐Selectivity Towards
sec
‐Alcohols. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800711] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yixin Cen
- Department of ChemistryZhejiang University Hangzhou 310027 People's Republic of China
| | - Danyang Li
- Department of ChemistryZhejiang University Hangzhou 310027 People's Republic of China
| | - Jian Xu
- Department of ChemistryZhejiang University Hangzhou 310027 People's Republic of China
| | - Qiongsi Wu
- Department of ChemistryZhejiang University Hangzhou 310027 People's Republic of China
| | - Qi Wu
- Department of ChemistryZhejiang University Hangzhou 310027 People's Republic of China
| | - Xianfu Lin
- Department of ChemistryZhejiang University Hangzhou 310027 People's Republic of China
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5
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Lipase-catalyzed asymmetric synthesis of naphtho[2,3-c]furan-1(3H)-one derivatives by a one-pot dynamic kinetic resolution/intramolecular Diels–Alder reaction: Total synthesis of (−)-himbacine. Bioorg Med Chem 2018; 26:1378-1386. [DOI: 10.1016/j.bmc.2017.08.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 08/09/2017] [Accepted: 08/10/2017] [Indexed: 10/19/2022]
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6
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Dorau R, Görbe T, Svedendahl Humble M. Improved Enantioselectivity of Subtilisin Carlsberg towards Secondary Alcohols by Protein Engineering. Chembiochem 2018; 19:338-346. [PMID: 29105250 DOI: 10.1002/cbic.201700408] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2017] [Indexed: 11/07/2022]
Abstract
Generally, the catalytic activity of subtilisin Carlsberg (SC) for transacylation reactions with secondary alcohols in organic solvent is low. Enzyme immobilization and protein engineering was performed to improve the enantioselectivity of SC towards secondary alcohols. Possible amino-acid residues for mutagenesis were found by combining available literature data with molecular modeling. SC variants were created by site-directed mutagenesis and were evaluated for a model transacylation reaction containing 1-phenylethanol in THF. Variants showing high E values (>100) were found. However, the conversions were still low. A second mutation was made, and both the E values and conversions were increased. Relative to that shown by the wild type, the most successful variant, G165L/M221F, showed increased conversion (up to 36 %), enantioselectivity (E values up to 400), substrate scope, and stability in THF.
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Affiliation(s)
- Robin Dorau
- Division of Industrial Biotechnology, School of Biotechnology, KTH Royal Institute of Technology, AlbaNova University Center, 106 91, Stockholm, Sweden
- Division of Microbiology and Production, National Food Institute, Technical University of Denmark, Kemitorvet, Bygning 201, 2800, Kgs. Lyngby, Denmark
| | - Tamás Görbe
- Department of Organic Chemistry, Stockholm University, Arrhenius Laboratory, 106 91, Stockholm, Sweden
| | - Maria Svedendahl Humble
- Division of Industrial Biotechnology, School of Biotechnology, KTH Royal Institute of Technology, AlbaNova University Center, 106 91, Stockholm, Sweden
- Pharem Biotech AB, Biovation Park, Forskargatan 20 J, 151 36, Stockholm, Sweden
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7
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Kim K, Lee E, Kim C, Park J, Kim MJ. Ionic-surfactant-coated subtilisin: activity, enantioselectivity, and application to dynamic kinetic resolution of secondary alcohols. Org Biomol Chem 2017; 15:8836-8844. [PMID: 29027557 DOI: 10.1039/c7ob02181j] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
In this work, we explored the utility of ionic-surfactant-coated Bacillus licheniformis subtilisin (ISCBLS) as the catalyst for the dynamic kinetic resolution of secondary alcohols. ISCBLS was prepared by freeze-drying Bacillus licheniformis subtilisin with both ionic surfactant 1 and dextrin. ISCBCL displayed 9300-fold enhanced activity relative to its native counterpart in the transesterificaion of N-acetyl phenylalanine ethyl ester with 1-propanol in hexane and 12 800-fold enhanced activity in the transesterification of trifluoroethyl butyrate with 1-phenylethanol in THF. The enantioselectivity of ISCBLS was examined with 50 secondary alcohols as the substrates for kinetic resolution in the presence of trifluoroethyl butyrate. ISCBLS displayed synthetically useful enantioselectivity for most of the secondary alcohols tested. The enantioselectivity of ISCBLS was in particular good to high for m- or p-substituted 1-phenylethanols. The DKRs of these secondary alcohols by the combination of ISCBLS and a ruthenium-based racemization catalyst provided the products of (S)-configuration with good results (80-94% yield, 90-99% ee). It is concluded that ISCBLS is of great use as the enantiocomplementary counterpart of (R)-selective lipase for the dynamic kinetic resolution of secondary alcohols.
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Affiliation(s)
- Kyungwoo Kim
- Department of Chemistry, Pohang University of Science and Technology, 77 Cheongam-ro, Pohang 37673, Republic of Korea.
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8
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Liang YR, Wu Q, Lin XF. Effect of Additives on the Selectivity and Reactivity of Enzymes. CHEM REC 2016; 17:90-121. [PMID: 27490244 DOI: 10.1002/tcr.201600016] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Indexed: 01/05/2023]
Abstract
Enzymes have been widely used as efficient, eco-friendly, and biodegradable catalysts in organic chemistry due to their mild reaction conditions and high selectivity and efficiency. In recent years, the catalytic promiscuity of many enzymes in unnatural reactions has been revealed and studied by chemists and biochemists, which has expanded the application potential of enzymes. To enhance the selectivity and activity of enzymes in their natural or promiscuous reactions, many methods have been recommended, such as protein engineering, process engineering, and media engineering. Among them, the additive approach is very attractive because of its simplicity to use and high efficiency. In this paper, we will review the recent developments about the applications of additives to improve the catalytic performances of enzymes in their natural and promiscuous reactions. These additives include water, organic bases, water mimics, cosolvents, crown ethers, salts, surfactants, and some particular molecular additives.
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Affiliation(s)
- Yi-Ru Liang
- Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Qi Wu
- Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
| | - Xian-Fu Lin
- Department of Chemistry, Zhejiang University, Hangzhou, 310027, P. R. China
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9
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Koszelewski D, Brodzka A, Żądło A, Paprocki D, Trzepizur D, Zysk M, Ostaszewski R. Dynamic Kinetic Resolution of 3-Aryl-4-pentenoic Acids. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00271] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dominik Koszelewski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Anna Brodzka
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Anna Żądło
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Daniel Paprocki
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Damian Trzepizur
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Małgorzata Zysk
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Ryszard Ostaszewski
- Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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10
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Chen S, Land H, Berglund P, Humble MS. Stabilization of an amine transaminase for biocatalysis. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcatb.2015.11.022] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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11
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Shoda SI, Uyama H, Kadokawa JI, Kimura S, Kobayashi S. Enzymes as Green Catalysts for Precision Macromolecular Synthesis. Chem Rev 2016; 116:2307-413. [PMID: 26791937 DOI: 10.1021/acs.chemrev.5b00472] [Citation(s) in RCA: 303] [Impact Index Per Article: 37.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The present article comprehensively reviews the macromolecular synthesis using enzymes as catalysts. Among the six main classes of enzymes, the three classes, oxidoreductases, transferases, and hydrolases, have been employed as catalysts for the in vitro macromolecular synthesis and modification reactions. Appropriate design of reaction including monomer and enzyme catalyst produces macromolecules with precisely controlled structure, similarly as in vivo enzymatic reactions. The reaction controls the product structure with respect to substrate selectivity, chemo-selectivity, regio-selectivity, stereoselectivity, and choro-selectivity. Oxidoreductases catalyze various oxidation polymerizations of aromatic compounds as well as vinyl polymerizations. Transferases are effective catalysts for producing polysaccharide having a variety of structure and polyesters. Hydrolases catalyzing the bond-cleaving of macromolecules in vivo, catalyze the reverse reaction for bond forming in vitro to give various polysaccharides and functionalized polyesters. The enzymatic polymerizations allowed the first in vitro synthesis of natural polysaccharides having complicated structures like cellulose, amylose, xylan, chitin, hyaluronan, and chondroitin. These polymerizations are "green" with several respects; nontoxicity of enzyme, high catalyst efficiency, selective reactions under mild conditions using green solvents and renewable starting materials, and producing minimal byproducts. Thus, the enzymatic polymerization is desirable for the environment and contributes to "green polymer chemistry" for maintaining sustainable society.
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Affiliation(s)
- Shin-ichiro Shoda
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University , Aoba-ku, Sendai 980-8579, Japan
| | - Hiroshi Uyama
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University , Yamadaoka, Suita 565-0871, Japan
| | - Jun-ichi Kadokawa
- Department of Chemistry, Biotechnology, and Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University , Korimoto, Kagoshima 890-0065, Japan
| | - Shunsaku Kimura
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University , Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Shiro Kobayashi
- Center for Fiber & Textile Science, Kyoto Institute of Technology , Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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12
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Karume I, Musa MM, Bsharat O, Takahashi M, Hamdan SM, El Ali B. Dual enzymatic dynamic kinetic resolution by Thermoanaerobacter ethanolicus secondary alcohol dehydrogenase and Candida antarctica lipase B. RSC Adv 2016. [DOI: 10.1039/c6ra18895h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The immobilization of Thermoanaerobacter ethanolicus secondary alcohol dehydrogenase (TeSADH) using sol–gel method enables its use to racemize enantiopure alcohols in organic media, thus allows for a dual enzymatic dynamic kinetic resolution.
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Affiliation(s)
- Ibrahim Karume
- Department of Chemistry
- King Fahd University of Petroleum and Minerals
- Dhahran
- Saudi Arabia
| | - Musa M. Musa
- Department of Chemistry
- King Fahd University of Petroleum and Minerals
- Dhahran
- Saudi Arabia
| | - Odey Bsharat
- Department of Chemistry
- King Fahd University of Petroleum and Minerals
- Dhahran
- Saudi Arabia
| | - Masateru Takahashi
- Division of Biological and Environmental Sciences and Engineering
- King Abdullah University of Science and Technology
- Thuwal 23955-6900
- Saudi Arabia
| | - Samir M. Hamdan
- Division of Biological and Environmental Sciences and Engineering
- King Abdullah University of Science and Technology
- Thuwal 23955-6900
- Saudi Arabia
| | - Bassam El Ali
- Department of Chemistry
- King Fahd University of Petroleum and Minerals
- Dhahran
- Saudi Arabia
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13
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Shimomura KI, Harami H, Matsubara Y, Nokami T, Katada N, Itoh T. Lipase-mediated dynamic kinetic resolution (DKR) of secondary alcohols in the presence of zeolite using an ionic liquid solvent system. Catal Today 2015. [DOI: 10.1016/j.cattod.2014.10.052] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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14
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Verho O, Bäckvall JE. Chemoenzymatic dynamic kinetic resolution: a powerful tool for the preparation of enantiomerically pure alcohols and amines. J Am Chem Soc 2015; 137:3996-4009. [PMID: 25730714 PMCID: PMC4415027 DOI: 10.1021/jacs.5b01031] [Citation(s) in RCA: 256] [Impact Index Per Article: 28.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
![]()
Chemoenzymatic
dynamic kinetic resolution (DKR) constitutes a convenient
and efficient method to access enantiomerically pure alcohol and amine
derivatives. This Perspective highlights the work carried out within
this field during the past two decades and pinpoints important avenues
for future research. First, the Perspective will summarize the more
developed area of alcohol DKR, by delineating the way from the earliest
proof-of-concept protocols to the current state-of-the-art systems
that allows for the highly efficient and selective preparation of
a wide range of enantiomerically pure alcohol derivatives. Thereafter,
the Perspective will focus on the more challenging DKR of amines,
by presenting the currently available homogeneous and heterogeneous
methods and their respective limitations. In these two parts, significant
attention will be dedicated to the design of efficient racemization
methods as an important means of developing milder DKR protocols.
In the final part of the Perspective, a brief overview of the research
that has been devoted toward improving enzymes as biocatalysts is
presented.
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Affiliation(s)
- Oscar Verho
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden
| | - Jan-E Bäckvall
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, S-106 91 Stockholm, Sweden
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15
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Deshapande N, Belavagi NS, Sunagar MG, Gaonkar S, Pujar GH, Wari MN, Inamdar SR, Khazi IAM. Synthesis, characterization and optoelectronic investigations of bithiophene substituted 1,3,4-oxadiazole derivatives as green fluorescent materials. RSC Adv 2015. [DOI: 10.1039/c5ra14550c] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Design and synthesis of novel bithiophene substituted oxadiazoles and exploration of their optoelectronic properties.
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Affiliation(s)
| | | | | | - Supreet Gaonkar
- CPEPA
- Department of Chemistry
- Karnatak University
- Dharwad 580003
- India
| | - G. H. Pujar
- CPEPA
- Department of Physics
- Karnatak University
- Dharwad 580003
- India
| | - M. N. Wari
- CPEPA
- Department of Physics
- Karnatak University
- Dharwad 580003
- India
| | - S. R. Inamdar
- CPEPA
- Department of Physics
- Karnatak University
- Dharwad 580003
- India
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16
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More GV, Badgujar KC, Bhanage BM. Kinetic resolution of secondary alcohols with Burkholderia cepacia lipase immobilized on a biodegradable ternary blend polymer matrix as a highly efficient and heterogeneous recyclable biocatalyst. RSC Adv 2015. [DOI: 10.1039/c4ra14478c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A greener and superficial protocol for the synthesis of enantiomerically pure alcohols and their enantioriched acetate derivatives using a biodegradable heterogeneous recyclable catalyst with high conversion has been developed.
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Affiliation(s)
- Ganesh V. More
- Institute of Chemical Technology
- Department of Chemistry
- Mumbai-400019
- India
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17
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Koszelewski D, Zysk M, Brodzka A, Żądło A, Paprocki D, Ostaszewski R. Evaluation of a new protocol for enzymatic dynamic kinetic resolution of 3-hydroxy-3-(aryl)propanoic acids. Org Biomol Chem 2015; 13:11014-20. [DOI: 10.1039/c5ob01380a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The application of tandem metal–enzyme dynamic kinetic resolution (DKR) is a powerful tool for the manufacture of high-value chemical commodities.
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Affiliation(s)
| | - Małgorzata Zysk
- Institute of Organic Chemistry PAS Kasprzaka 44/52
- 01-224 Warsaw
- Poland
| | - Anna Brodzka
- Institute of Organic Chemistry PAS Kasprzaka 44/52
- 01-224 Warsaw
- Poland
| | - Anna Żądło
- Institute of Organic Chemistry PAS Kasprzaka 44/52
- 01-224 Warsaw
- Poland
| | - Daniel Paprocki
- Institute of Organic Chemistry PAS Kasprzaka 44/52
- 01-224 Warsaw
- Poland
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18
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Lihammar R, Rönnols J, Widmalm G, Bäckvall JE. Epimerization of glycal derivatives by a cyclopentadienylruthenium catalyst: application to metalloenzymatic DYKAT. Chemistry 2014; 20:14756-62. [PMID: 25234515 DOI: 10.1002/chem.201403720] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 08/15/2014] [Indexed: 11/07/2022]
Abstract
Epimerization of a non-anomeric stereogenic center in carbohydrates is an important transformation in the synthesis of natural products. In this study an epimerization procedure of the allylic alcohols of glycals by cyclopentadienylruthenium catalyst 1 is presented. The epimerization of 4,6-O-benzylidene-D-glucal 4 in toluene is rapid, and an equlibrium with its D-allal epimer 5 is established within 5 min at room temperature. Exchange rates for allal and glucal formation were determined by 1D (1) H EXSY NMR experiments to be 0.055 s(-1) and 0.075 s(-1) , respectively. For 4-O-benzyl-L-rhamnal 8 the epimerization was less rapid and four days of epimerization was required to achieve equilibration of the epimers at room temperature. The epimerization methodology was subsequently combined with acylating enzymes in a dynamic kinetic asymmetric transformation (DYKAT), giving stereoselective acylation to the desired stereoisomers 12, 13, and 15. The net effect of this process is an inversion of a stereogenic center on the glycal, and yields ranging from 71 % to 83 % of the epimer were obtained.
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Affiliation(s)
- Richard Lihammar
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, 106 91 Stockholm (Sweden)
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19
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Fernández-Salas JA, Manzini S, Nolan SP. A cationic ruthenium complex for the dynamic kinetic resolution of secondary alcohols. Chemistry 2014; 20:13132-5. [PMID: 25167839 DOI: 10.1002/chem.201404096] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Indexed: 11/11/2022]
Abstract
A synthetic protocol making use of a well-defined cationic ruthenium complex 2 enabling the racemization of enantiomerically pure secondary alcohols in the presence of a weak base (K2CO3) is described. The compatibility of 2 with Candida Antarctica lipase B (Novozym 435) allows the development of an efficient dynamic kinetic resolution of sec-alcohols in the absence of an additional strong base. This procedure involves the first example of a dynamic kinetic resolution of alcohols in the presence of a cationic ruthenium catalyst. In addition, we describe the conversion of ketones to the enantioenriched acetates in a one-pot reaction, probing the versatility of complex 2.
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Affiliation(s)
- José A Fernández-Salas
- EaStCHEM School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
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20
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Agrawal S, Martínez-Castro E, Marcos R, Martín-Matute B. Readily Available Ruthenium Complex for Efficient Dynamic Kinetic Resolution of Aromatic α-Hydroxy Ketones. Org Lett 2014; 16:2256-9. [DOI: 10.1021/ol500764q] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Santosh Agrawal
- Department of Organic Chemistry,
The Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Elisa Martínez-Castro
- Department of Organic Chemistry,
The Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Rocío Marcos
- Department of Organic Chemistry,
The Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Belén Martín-Matute
- Department of Organic Chemistry,
The Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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21
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Denard CA, Huang H, Bartlett MJ, Lu L, Tan Y, Zhao H, Hartwig JF. Cooperative Tandem Catalysis by an Organometallic Complex and a Metalloenzyme. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201305778] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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22
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Denard CA, Huang H, Bartlett MJ, Lu L, Tan Y, Zhao H, Hartwig JF. Cooperative Tandem Catalysis by an Organometallic Complex and a Metalloenzyme. Angew Chem Int Ed Engl 2013; 53:465-9. [DOI: 10.1002/anie.201305778] [Citation(s) in RCA: 117] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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23
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Denard CA, Hartwig JF, Zhao H. Multistep One-Pot Reactions Combining Biocatalysts and Chemical Catalysts for Asymmetric Synthesis. ACS Catal 2013. [DOI: 10.1021/cs400633a] [Citation(s) in RCA: 188] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
| | - John F. Hartwig
- Department
of Chemistry, University of California−Berkeley, Berkeley, California, United States
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24
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Kobayashi S. Green Polymer Chemistry: Recent Developments. ADVANCES IN POLYMER SCIENCE 2013. [DOI: 10.1007/12_2013_236] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
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25
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Covell DJ, White MC. A C-H oxidation approach for streamlining synthesis of chiral polyoxygenated motifs. Tetrahedron 2013; 69:7771-7778. [PMID: 25013239 PMCID: PMC4084758 DOI: 10.1016/j.tet.2013.05.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Chiral oxygenated molecules are pervasive in natural products and medicinal agents; however, their chemical syntheses often necessitate numerous, wasteful steps involving functional group and oxidation state manipulations. Herein a strategy for synthesizing a readily diversifiable class of chiral building blocks, allylic alcohols, through sequential asymmetric C-H activation/resolution is evaluated against the state-of-the-art. The C-H oxidation routes' capacity to strategically introduce oxygen into a sequence and thereby minimize non-productive manipulations is demonstrated to effect significant decreases in overall step-count and increases in yield and synthetic flexibility.
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Affiliation(s)
- Dustin J. Covell
- Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine Philadelphia, PA 19104, USA
| | - M. Christina White
- Department of Chemistry, Roger Adams Laboratory, University of Illinois Urbana, IL 61801, USA
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26
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Kim S, Choi YK, Hong J, Park J, Kim MJ. Candida antarctica lipase A and Pseudomonas stutzeri lipase as a pair of stereocomplementary enzymes for the resolution of 1,2-diarylethanols and 1,2-diarylethanamines. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.11.147] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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27
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Kim C, Lee J, Cho J, Oh Y, Choi YK, Choi E, Park J, Kim MJ. Kinetic and Dynamic Kinetic Resolution of Secondary Alcohols with Ionic-Surfactant-Coated Burkholderia cepacia Lipase: Substrate Scope and Enantioselectivity. J Org Chem 2013; 78:2571-8. [DOI: 10.1021/jo3027627] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Cheolwoo Kim
- Department of Chemistry, Pohang University of Science and Technology, San-31 Hyojadong, Pohang
790-784, Republic of Korea
| | - Jusuk Lee
- Department of Chemistry, Pohang University of Science and Technology, San-31 Hyojadong, Pohang
790-784, Republic of Korea
| | - Jeonghun Cho
- Department of Chemistry, Pohang University of Science and Technology, San-31 Hyojadong, Pohang
790-784, Republic of Korea
| | - Yeonock Oh
- Department of Chemistry, Pohang University of Science and Technology, San-31 Hyojadong, Pohang
790-784, Republic of Korea
| | - Yoon Kyung Choi
- Department of Chemistry, Pohang University of Science and Technology, San-31 Hyojadong, Pohang
790-784, Republic of Korea
| | - Eunjeong Choi
- Department of Chemistry, Pohang University of Science and Technology, San-31 Hyojadong, Pohang
790-784, Republic of Korea
| | - Jaiwook Park
- Department of Chemistry, Pohang University of Science and Technology, San-31 Hyojadong, Pohang
790-784, Republic of Korea
| | - Mahn-Joo Kim
- Department of Chemistry, Pohang University of Science and Technology, San-31 Hyojadong, Pohang
790-784, Republic of Korea
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28
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Hu L, Schaufelberger F, Zhang Y, Ramström O. Efficient asymmetric synthesis of lamivudine via enzymatic dynamic kinetic resolution. Chem Commun (Camb) 2013; 49:10376-8. [DOI: 10.1039/c3cc45551c] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The anti-HIV nucleoside lamivudine was asymmetrically synthesized in only three steps via a novel surfactant-treated subtilisin Carlsberg-catalyzed dynamic kinetic resolution protocol.
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Affiliation(s)
- Lei Hu
- Royal Institute of Technology
- Department of Chemistry
- Stockholm
- Sweden
| | | | - Yan Zhang
- Royal Institute of Technology
- Department of Chemistry
- Stockholm
- Sweden
| | - Olof Ramström
- Royal Institute of Technology
- Department of Chemistry
- Stockholm
- Sweden
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29
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Musa MM, Phillips RS, Laivenieks M, Vieille C, Takahashi M, Hamdan SM. Racemization of enantiopure secondary alcohols by Thermoanaerobacter ethanolicus secondary alcohol dehydrogenase. Org Biomol Chem 2013; 11:2911-5. [DOI: 10.1039/c3ob27415b] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Hoyos P, Pace V, Alcántara AR. Dynamic Kinetic ResolutionviaHydrolase-Metal Combo Catalysis in Stereoselective Synthesis of Bioactive Compounds. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201200365] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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31
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Ahmed M, Kelly T, Ghanem A. Applications of enzymatic and non-enzymatic methods to access enantiomerically pure compounds using kinetic resolution and racemisation. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.05.049] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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32
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Marcos R, Martín-Matute B. Combined Enzyme and Transition-Metal Catalysis for Dynamic Kinetic Resolutions. Isr J Chem 2012. [DOI: 10.1002/ijch.201200012] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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33
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Schober M, Knaus T, Toesch M, Macheroux P, Wagner U, Faber K. The Substrate Spectrum of the Inverting sec-Alkylsulfatase Pisa1. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100864] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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34
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Ema T, Nakano Y, Yoshida D, Kamata S, Sakai T. Redesign of enzyme for improving catalytic activity and enantioselectivity toward poor substrates: manipulation of the transition state. Org Biomol Chem 2012; 10:6299-308. [DOI: 10.1039/c2ob25614b] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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35
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Ohara H, Nishioka E, Yamaguchi S, Kawai F, Kobayashi S. Protease-Catalyzed Oligomerization and Hydrolysis of Alkyl Lactates Involving l-Enantioselective Deacylation Step. Biomacromolecules 2011; 12:3833-7. [DOI: 10.1021/bm201004g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hitomi Ohara
- Department of Biobased Materials Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku,
Kyoto 606-8585, Japan
| | - Emiko Nishioka
- Department of Biobased Materials Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku,
Kyoto 606-8585, Japan
| | - Syuhei Yamaguchi
- Department of Biobased Materials Science, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku,
Kyoto 606-8585, Japan
| | - Fusako Kawai
- Center
for Nanomaterials and Devices, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Shiro Kobayashi
- Center
for Nanomaterials and Devices, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
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36
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López-Iglesias M, Busto E, Gotor V, Gotor-Fernández V. Use of Protease from Bacillus licheniformis as Promiscuous Catalyst for Organic Synthesis: Applications in CC and CN Bond Formation Reactions. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201100347] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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37
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Bang JK, Jung SO, Kim YW, Kim MJ. Subtilisin-Catalyzed Transesterifications in the Presence of Iron Oxide Nanoparticles in Organic Solvent: Dramatic Catalytic Improvement. B KOREAN CHEM SOC 2011. [DOI: 10.5012/bkcs.2011.32.8.2871] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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38
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Träff A, Lihammar R, Bäckvall JE. A Chemoenzymatic Dynamic Kinetic Resolution Approach to Enantiomerically Pure (R)- and (S)-Duloxetine. J Org Chem 2011; 76:3917-21. [DOI: 10.1021/jo2003665] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Annika Träff
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Richard Lihammar
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Jan-E. Bäckvall
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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39
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Mohareb RM, Schatz J. Anti-tumor and anti-leishmanial evaluations of 1,3,4-oxadiazine, pyran derivatives derived from cross-coupling reactions of β-bromo-6H-1,3,4-oxadiazine derivatives. Bioorg Med Chem 2011; 19:2707-13. [DOI: 10.1016/j.bmc.2011.02.051] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2010] [Revised: 02/19/2011] [Accepted: 02/28/2011] [Indexed: 11/27/2022]
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40
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Päiviö M, Mavrynsky D, Leino R, Kanerva LT. Dynamic Kinetic Resolution of a Wide Range of Secondary Alcohols: Cooperation of Dicarbonylchlorido(pentabenzylcyclopentadienyl)ruthenium and CAL-B. European J Org Chem 2011. [DOI: 10.1002/ejoc.201001703] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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41
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Thalén LK, Sumic A, Bogár K, Norinder J, Persson AKÅ, Bäckvall JE. Enantioselective synthesis of α-methyl carboxylic acids from readily available starting materials via chemoenzymatic dynamic kinetic resolution. J Org Chem 2011; 75:6842-7. [PMID: 20857917 DOI: 10.1021/jo1011653] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An enantioselective method for the synthesis of α-methyl carboxylic acids starting from trans-cinnamaldehyde, a readily available and inexpensive compound, has been developed. Allylic alcohol 1 was obtained via a standard Grignard addition to trans-cinnamaldehyde. Dynamic kinetic resolution was applied to allylic alcohol 1 utilizing a ruthenium catalyst and either an (R)-selective lipase or an (S)-selective protease to provide the corresponding allylic esters in high yield and high ee. A copper-catalyzed allylic substitution was then applied to provide the corresponding alkenes with inversion of stereochemistry. Subsequent C-C double bond cleavage afforded pharmaceutically important α-methyl substituted carboxylic acids in high ee and overall yields of up to 76%.
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Affiliation(s)
- Lisa K Thalén
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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42
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Engström K, Vallin M, Syrén PO, Hult K, Bäckvall JE. Mutated variant of Candida antarcticalipase B in (S)-selective dynamic kinetic resolution of secondary alcohols. Org Biomol Chem 2011; 9:81-2. [DOI: 10.1039/c0ob00748j] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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43
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Do Y, Hwang IC, Kim MJ, Park J. Photoactivated Racemization Catalyst for Dynamic Kinetic Resolution of Secondary Alcohols. J Org Chem 2010; 75:5740-2. [DOI: 10.1021/jo1009036] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Youngshil Do
- Department of Chemistry Pohang University of Science and Technology (POSTECH), San 31 Hyojadong, Pohang, Kyeongbuk 790-784, Republic of Korea
| | - In-Chul Hwang
- Department of Chemistry Pohang University of Science and Technology (POSTECH), San 31 Hyojadong, Pohang, Kyeongbuk 790-784, Republic of Korea
| | - Mahn-Joo Kim
- Department of Chemistry Pohang University of Science and Technology (POSTECH), San 31 Hyojadong, Pohang, Kyeongbuk 790-784, Republic of Korea
| | - Jaiwook Park
- Department of Chemistry Pohang University of Science and Technology (POSTECH), San 31 Hyojadong, Pohang, Kyeongbuk 790-784, Republic of Korea
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44
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Lee JH, Han K, Kim M, Park J. Chemoenzymatic Dynamic Kinetic Resolution of Alcohols and Amines. European J Org Chem 2010. [DOI: 10.1002/ejoc.200900935] [Citation(s) in RCA: 197] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jin Hee Lee
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), San 31 Hyoja‐dong, Nam‐gu, Pohang‐si, Gyeongbuk, 790‐784, Korea, Fax: +82‐54‐279‐2117
| | - Kiwon Han
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), San 31 Hyoja‐dong, Nam‐gu, Pohang‐si, Gyeongbuk, 790‐784, Korea, Fax: +82‐54‐279‐2117
| | - Mahn‐Joo Kim
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), San 31 Hyoja‐dong, Nam‐gu, Pohang‐si, Gyeongbuk, 790‐784, Korea, Fax: +82‐54‐279‐2117
| | - Jaiwook Park
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), San 31 Hyoja‐dong, Nam‐gu, Pohang‐si, Gyeongbuk, 790‐784, Korea, Fax: +82‐54‐279‐2117
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45
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El Blidi L, Vanthuyne N, Siri D, Gastaldi S, Bertrand MP, Gil G. Switching from (R)- to (S)-selective chemoenzymatic DKR of amines involving sulfanyl radical-mediated racemization. Org Biomol Chem 2010; 8:4165-8. [DOI: 10.1039/c0ob00054j] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Yin SH, Liu Y, Zhang W, Guo MX, Song P. Time-dependent density functional theory study on the hydrogen bonding-induced twisted intramolecular charge-transfer excited states of 2-(4′-N,N-dimethylaminophenyl)imidazo[4,5-b]pyridine. J Comput Chem 2010; 31:2056-62. [DOI: 10.1002/jcc.21492] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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47
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Pietruszka JÃ, Simon RC, Kruska F, Braun M. Dynamic Enzymatic Kinetic Resolution of Methyl 2,3-Dihydro-1H-indene-1-carboxylate. European J Org Chem 2009. [DOI: 10.1002/ejoc.200901025] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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48
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Cox BM, Bilsborrow JB, Walker KD. Enhanced Conversion of Racemic α-Arylalanines to (R)-β-Arylalanines by Coupled Racemase/Aminomutase Catalysis. J Org Chem 2009; 74:6953-9. [DOI: 10.1021/jo9009563] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Brad M. Cox
- Department of Chemistry
- Department of Biochemistry and Molecular Biology
- Michigan State University, East Lansing, Michigan 48824
| | - Joshua B. Bilsborrow
- Department of Chemistry
- Department of Biochemistry and Molecular Biology
- Michigan State University, East Lansing, Michigan 48824
| | - Kevin D. Walker
- Department of Chemistry
- Department of Biochemistry and Molecular Biology
- Michigan State University, East Lansing, Michigan 48824
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49
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Lipase-catalysed kinetic resolutions of secondary alcohols in pressurised liquid hydrofluorocarbons. Tetrahedron Lett 2009. [DOI: 10.1016/j.tetlet.2009.03.037] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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50
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Rodríguez C, Gonzalo GD, Torres Pazmiño DE, Fraaije MW, Gotor V. Baeyer–Villiger monooxygenase-catalyzed kinetic resolution of racemic α-alkyl benzyl ketones: enzymatic synthesis of α-alkyl benzylketones and α-alkyl benzylesters. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.tetasy.2009.03.018] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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