1
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Le TV, Romero I, Daugulis O. "Sandwich" Diimine-Copper Catalyzed Trifluoroethylation and Pentafluoropropylation of Unactivated C(sp 3 )-H Bonds by Carbene Insertion. Chemistry 2023; 29:e202301672. [PMID: 37267071 PMCID: PMC10642771 DOI: 10.1002/chem.202301672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 05/26/2023] [Accepted: 05/30/2023] [Indexed: 06/04/2023]
Abstract
We report here "sandwich"-diimine copper complex-catalyzed trifluoroethylation and pentafluoropropylation of unactivated C(sp3 )-H bonds in alkyl esters, halides, and protected amines by employing CF3 CHN2 and CF3 CF2 CHN2 reagents. Reactions proceed in dichloromethane solvent at room temperature. Identical C-H functionalization conditions and stoichiometries are employed for generality and convenience. Selectivities for C-H insertions are higher for compounds possessing stronger electron-withdrawing substituents. Preliminary mechanistic studies point to a mechanism involving a pre-equilibrium forming a "sandwich"-diimine copper-CF3 CHN2 complex followed by rate-determining loss of nitrogen affording the reactive copper carbene. It reacts with trifluoromethyldiazomethane about 6.5 times faster than with 1-fluoroadamantane explaining the need for slow addition of the diazo compound.
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Affiliation(s)
| | | | - Olafs Daugulis
- Department of Chemistry, University of Houston 3585 Cullen Blvd
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2
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Ganesh K, Sambasivam G, Gavara G, S R, Rajendra G, Karthikeyan S. An efficient metal free synthesis of 2-aminobenzothiozoles - a greener approach. Org Biomol Chem 2023; 21:564-568. [PMID: 36538019 DOI: 10.1039/d2ob01981g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A facile one-pot, metal-free method for the synthesis of 2-aminobenzothiazoles was developed, which includes an initial reaction of electron-deficient 2-haloanilines with aromatic isothiocyanates and the subsequent intramolecular cyclization of the resulting thioureas through the SNAr mechanism. This one-pot, atom-economical, robust, and scalable method avoids the use of reagents such as acid chlorides and Lawesson's reagent that are difficult to handle.
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Affiliation(s)
- Krithika Ganesh
- Anthem Biosciences Pvt. Ltd, Bangalore 560099, India
- Vellore Institute of Technology, Vellore 632014, India
| | | | | | - Ramraj S
- Anthem Biosciences Pvt. Ltd, Bangalore 560099, India
| | | | - S Karthikeyan
- Vellore Institute of Technology, Vellore 632014, India
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3
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Hirbawi N, Lin PC, Jarvo ER. Halogenation Reactions of Alkyl Alcohols Employing Methyl Grignard Reagents. J Org Chem 2022; 87:12352-12369. [PMID: 36049783 PMCID: PMC9486953 DOI: 10.1021/acs.joc.2c01590] [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: 07/07/2022] [Indexed: 11/29/2022]
Abstract
Grignard reagents are commonly used as carbanion equivalents. Herein, we report an example of Grignard reagents acting as halide nucleophiles to form alkyl iodides and bromides. We establish that Grignard reagents can convert alkyl mesylates into alkyl halides, as well as be employed in a one-pot halogenation reaction starting from alcohols, which proceed through mesylate intermediates. The halogenation reaction is confirmed to occur by an SN2 pathway with inversion of configuration and is demonstrated to be efficient on multi-gram scale.
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Affiliation(s)
| | | | - Elizabeth R. Jarvo
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
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4
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Severin F, Fusi GM, Wartmann C, Neudörfl J, Berkessel A. syn
‐Selective Epoxidation of Chiral Terminal Allylic Alcohols with a Titanium Salalen Catalyst and Hydrogen Peroxide. Angew Chem Int Ed Engl 2022; 61:e202201790. [PMID: 35349213 PMCID: PMC9325473 DOI: 10.1002/anie.202201790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Indexed: 12/02/2022]
Abstract
In the Sharpless asymmetric epoxidation of chiral secondary allylic alcohols, one substrate enantiomer is predominantly converted to the anti‐epoxy alcohol. We herein report the first highly syn‐selective epoxidation of terminal allylic alcohols using a titanium salalen complex as catalyst, at room temperature, and aqueous hydrogen peroxide as oxidant. With enantiopure terminal allylic alcohols as substrates, the epoxy alcohols were obtained with up to 98 % yield and up to >99 : 1 dr (syn). Catalyst loadings as low as 1 mol % can be applied without eroding the syn‐diastereoselectivity. Modification of the allylic alcohol to an ether does not affect the diastereoselectivity either [>99 : 1 dr (syn)]. Inverting the catalyst configuration leads to the anti‐product, albeit at lower dr (ca. 20 : 1). The synthetic potential is demonstrated by a short, gram‐scale preparation of a tetrahydrofuran building block with three stereocenters, involving two titanium salalen catalyzed epoxidation steps.
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Affiliation(s)
- Fabian Severin
- Department of Chemistry Organic Chemistry University of Cologne Greinstraße 4 50939 Cologne Germany
| | - Giovanni M. Fusi
- Department of Chemistry Organic Chemistry University of Cologne Greinstraße 4 50939 Cologne Germany
- Dipartimento di Scienza e Alta Tecnologia—DiSAT Università degli Studi dell'Insubria Via Valleggio 9 22100 Como Italy
| | - Christina Wartmann
- Department of Chemistry Organic Chemistry University of Cologne Greinstraße 4 50939 Cologne Germany
| | - Jörg‐Martin Neudörfl
- Department of Chemistry Organic Chemistry University of Cologne Greinstraße 4 50939 Cologne Germany
| | - Albrecht Berkessel
- Department of Chemistry Organic Chemistry University of Cologne Greinstraße 4 50939 Cologne Germany
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5
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Severin F, Fusi GM, Wartmann C, Neudörfl J, Berkessel A. syn
‐Selective Epoxidation of Chiral Terminal Allylic Alcohols with a Titanium Salalen Catalyst and Hydrogen Peroxide. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Fabian Severin
- Department of Chemistry Organic Chemistry University of Cologne Greinstraße 4 50939 Cologne Germany
| | - Giovanni M. Fusi
- Department of Chemistry Organic Chemistry University of Cologne Greinstraße 4 50939 Cologne Germany
- Dipartimento di Scienza e Alta Tecnologia—DiSAT Università degli Studi dell'Insubria Via Valleggio 9 22100 Como Italy
| | - Christina Wartmann
- Department of Chemistry Organic Chemistry University of Cologne Greinstraße 4 50939 Cologne Germany
| | - Jörg‐Martin Neudörfl
- Department of Chemistry Organic Chemistry University of Cologne Greinstraße 4 50939 Cologne Germany
| | - Albrecht Berkessel
- Department of Chemistry Organic Chemistry University of Cologne Greinstraße 4 50939 Cologne Germany
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6
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Pérez‐Venegas M, Tellez‐Cruz MM, Solorza‐Feria O, López‐Munguía A, Castillo E, Juaristi E. Thermal and Mechanical Stability of Immobilized
Candida antarctica
Lipase B: an Approximation to Mechanochemical Energetics in Enzyme Catalysis. ChemCatChem 2019. [DOI: 10.1002/cctc.201901714] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Mario Pérez‐Venegas
- Department of ChemistryCentro de Investigación y de Estudios Avanzados Av. IPN 2508 Ciudad de México 07360 Mexico
| | - Miriam M. Tellez‐Cruz
- Department of ChemistryCentro de Investigación y de Estudios Avanzados Av. IPN 2508 Ciudad de México 07360 Mexico
| | - Omar Solorza‐Feria
- Department of ChemistryCentro de Investigación y de Estudios Avanzados Av. IPN 2508 Ciudad de México 07360 Mexico
| | - Agustín López‐Munguía
- Department of cellular engineering and biocatalysisUniversidad Nacional Autónoma de México Av. Universidad 2001 Col. Chamilpa 62210 Cuernavaca Mexico
| | - Edmundo Castillo
- Department of cellular engineering and biocatalysisUniversidad Nacional Autónoma de México Av. Universidad 2001 Col. Chamilpa 62210 Cuernavaca Mexico
| | - Eusebio Juaristi
- Department of ChemistryCentro de Investigación y de Estudios Avanzados Av. IPN 2508 Ciudad de México 07360 Mexico
- El Colegio Nacional Luis Gonzáles Obregón 23 Ciudad de México 06020 Mexico
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7
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Structural basis for a highly (S)-enantioselective reductase towards aliphatic ketones with only one carbon difference between side chain. Appl Microbiol Biotechnol 2019; 103:9543-9553. [DOI: 10.1007/s00253-019-10093-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 08/05/2019] [Accepted: 08/05/2019] [Indexed: 11/26/2022]
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8
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Dolke F, Dong C, Bandi S, Paetz C, Glauser G, von Reuß SH. Ascaroside Signaling in the Bacterivorous Nematode Caenorhabditis remanei Encodes the Growth Phase of Its Bacterial Food Source. Org Lett 2019; 21:5832-5837. [PMID: 31305087 DOI: 10.1021/acs.orglett.9b01914] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A novel class of species-specific modular ascarosides that integrate additional fatty acid building blocks was characterized in the nematode Caenorhabditis remanei using a combination of HPLC-ESI-(-)-MS/MS precursor ion scanning, microreactions, HR-MS/MS, MSn, and NMR techniques. The structure of the dominating component carrying a cyclopropyl fatty acid moiety was established by total synthesis. Biogenesis of this female-produced male attractant depends on cyclopropyl fatty acid synthase (cfa), which is expressed in bacteria upon entering their stationary phase.
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Affiliation(s)
- Franziska Dolke
- Department of Bioorganic Chemistry , Max Planck Institute for Chemical Ecology , Hans-Knöll Straße 8 , D-07745 Jena , Germany
| | - Chuanfu Dong
- Department of Bioorganic Chemistry , Max Planck Institute for Chemical Ecology , Hans-Knöll Straße 8 , D-07745 Jena , Germany
| | - Siva Bandi
- Laboratory for Bioanalytical Chemistry, Institute of Chemistry , University of Neuchâtel , Avenue de Bellevaux 51 , CH-2000 Neuchâtel , Switzerland
| | - Christian Paetz
- Research Group Biosynthesis/NMR , Max Planck Institute for Chemical Ecology , Hans-Knöll Straße 8 , D-07745 Jena , Germany
| | - Gaétan Glauser
- Neuchâtel Platform for Analytical Chemistry (NPAC) , University of Neuchâtel , Avenue de Bellevaux 51 , CH-2000 Neuchâtel , Switzerland
| | - Stephan H von Reuß
- Department of Bioorganic Chemistry , Max Planck Institute for Chemical Ecology , Hans-Knöll Straße 8 , D-07745 Jena , Germany.,Laboratory for Bioanalytical Chemistry, Institute of Chemistry , University of Neuchâtel , Avenue de Bellevaux 51 , CH-2000 Neuchâtel , Switzerland.,Neuchâtel Platform for Analytical Chemistry (NPAC) , University of Neuchâtel , Avenue de Bellevaux 51 , CH-2000 Neuchâtel , Switzerland
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9
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Diaz‐Vidal T, Armenta‐Perez VP, Rosales‐Rivera LC, Mateos‐Díaz JC, Rodríguez JA. Cross‐linked enzyme aggregates of recombinant
Candida antarctica
lipase B for the efficient synthesis of olvanil, a nonpungent capsaicin analogue. Biotechnol Prog 2019; 35:e2807. [DOI: 10.1002/btpr.2807] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Revised: 03/06/2019] [Accepted: 03/14/2019] [Indexed: 01/04/2023]
Affiliation(s)
- Tania Diaz‐Vidal
- Biotecnología Industrial, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, CIATEJ Zapopan Jalisco Mexico
| | - Vicente Paul Armenta‐Perez
- Biotecnología Industrial, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, CIATEJ Zapopan Jalisco Mexico
| | | | - Juan C. Mateos‐Díaz
- Biotecnología Industrial, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, CIATEJ Zapopan Jalisco Mexico
| | - Jorge A. Rodríguez
- Biotecnología Industrial, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, CIATEJ Zapopan Jalisco Mexico
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10
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Yao Z, Jiang S, Zhang L, Gao B, He X, Zhang JZH, Wei D. Crius: A novel fragment-based algorithm of de novo substrate prediction for enzymes. Protein Sci 2018; 27:1526-1534. [PMID: 29722450 DOI: 10.1002/pro.3437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Revised: 04/25/2018] [Accepted: 04/27/2018] [Indexed: 11/07/2022]
Abstract
The study of enzyme substrate specificity is vital for developing potential applications of enzymes. However, the routine experimental procedures require lot of resources in the discovery of novel substrates. This article reports an in silico structure-based algorithm called Crius, which predicts substrates for enzyme. The results of this fragment-based algorithm show good agreements between the simulated and experimental substrate specificities, using a lipase from Candida antarctica (CALB), a nitrilase from Cyanobacterium syechocystis sp. PCC6803 (Nit6803), and an aldo-keto reductase from Gluconobacter oxydans (Gox0644). This opens new prospects of developing computer algorithms that can effectively predict substrates for an enzyme.
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Affiliation(s)
- Zhiqiang Yao
- State Key Laboratory of Bioreactor Engineering, East China university of Science and Technology, Meilong Road 130th, Shanghai, People's Republic of China
| | - Shuiqin Jiang
- State Key Laboratory of Bioreactor Engineering, East China university of Science and Technology, Meilong Road 130th, Shanghai, People's Republic of China
| | - Lujia Zhang
- State Key Laboratory of Bioreactor Engineering, East China university of Science and Technology, Meilong Road 130th, Shanghai, People's Republic of China.,Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Department of Chemistry, School of Molecular Engineering, East China Normal University, Shanghai, 200062, China.,NYU-ECNU Center for Computational Chemistry at NYU Shanghai, Shanghai, 200062, China
| | - Bei Gao
- State Key Laboratory of Bioreactor Engineering, East China university of Science and Technology, Meilong Road 130th, Shanghai, People's Republic of China
| | - Xiao He
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Department of Chemistry, School of Molecular Engineering, East China Normal University, Shanghai, 200062, China.,NYU-ECNU Center for Computational Chemistry at NYU Shanghai, Shanghai, 200062, China
| | - John Z H Zhang
- Shanghai Engineering Research Center of Molecular Therapeutics and New Drug Development, Department of Chemistry, School of Molecular Engineering, East China Normal University, Shanghai, 200062, China.,NYU-ECNU Center for Computational Chemistry at NYU Shanghai, Shanghai, 200062, China
| | - Dongzhi Wei
- State Key Laboratory of Bioreactor Engineering, East China university of Science and Technology, Meilong Road 130th, Shanghai, People's Republic of China
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11
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12
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Soni S, Dwivedee BP, Sharma VK, Patel G, Banerjee UC. Exploration of the expeditious potential of Pseudomonas fluorescens lipase in the kinetic resolution of racemic intermediates and its validation through molecular docking. Chirality 2017; 30:85-94. [PMID: 29064594 DOI: 10.1002/chir.22771] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 08/28/2017] [Accepted: 09/03/2017] [Indexed: 11/05/2022]
Abstract
A profoundly time-efficient chemoenzymatic method for the synthesis of (S)-3-(4-chlorophenoxy)propan-1,2-diol and (S)-1-chloro-3-(2,5-dichlorophenoxy)propan-2-ol, two important pharmaceutical intermediates, was successfully developed using Pseudomonas fluorescens lipase (PFL). Kinetic resolution was successfully achieved using vinyl acetate as acylating agent, toluene/hexane as solvent, and reaction temperature of 30°C giving high enantioselectivity and conversion. Under optimized condition, PFL demonstrated 50.2% conversion, enantiomeric excess of 95.0%, enantioselectivity (E = 153) in an optimum time of 1 hour and 50.3% conversion, enantiomeric excess of 95.2%, enantioselectivity (E = 161) in an optimum time of 3 hours, for the two racemic alcohols, respectively. Docking of the R- and S-enantiomers of the intermediates demonstrated stronger H-bond interaction between the hydroxyl group of the R-enantiomer and the key binding residues of the catalytic site of the lipase, while the S-enantiomer demonstrated lesser interaction. Thus, docking study complemented the experimental outcome that PFL preferentially acylated the R form of the intermediates. The present study demonstrates a cost-effective and expeditious biocatalytic process that can be applied in the enantiopure synthesis of pharmaceutical intermediates and drugs.
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Affiliation(s)
- Surbhi Soni
- Department of Biotechnology, National Institute of Pharmaceutical Education and Research, Punjab, India
| | - Bharat P Dwivedee
- Department of Pharmaceutical Technology (Biotechnology), National Institute of Pharmaceutical Education and Research, Punjab, India
| | - Vishnu K Sharma
- Department of Pharmacoinformatics, National Institute of Pharmaceutical Education and Research, Punjab, India
| | - Gopal Patel
- Department of Pharmaceutical Technology (Biotechnology), National Institute of Pharmaceutical Education and Research, Punjab, India
| | - Uttam C Banerjee
- Department of Pharmaceutical Technology (Biotechnology), National Institute of Pharmaceutical Education and Research, Punjab, India
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13
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Thomas JC, Burich MD, Bandeira PT, Marques de Oliveira AR, Piovan L. Biocatalysis in continuous-flow mode: A case-study in the enzymatic kinetic resolution of secondary alcohols via acylation and deacylation reactions mediated by Novozym 435®. ACTA ACUST UNITED AC 2017. [DOI: 10.1515/boca-2017-0003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractEnzymatic kinetic resolution reactions are a well-established way to achieve optically active compounds. When enzymatic reactions are combined to continuous-flow methodologies, other benefits are added, including reproducibility, optimized energy use, minimized waste generation, among others. In this context, we herein report a case study involving lipase-mediated transesterification by acylation and deacylation reactions of secondary alcohols/esters in batch and continuous-flow modes. Acylation reactions were performed with high values of enantiomeric excess (72 up to >99%) and enantioselectivity (E > 200) for both batch and continuous-flow modes. On the other hand, for deacylation reactions using n-butanol as nucleophile, enatiomeric excess ranged between 38 to >99% and E from 6 to >200 were observed for batch mode. For deacylation reactions in continuous-flow mode, results were disappointing, as in some cases, very low or no conversion was observed. Enantiomeric excess ranged from 16 to >99% and enantioselectivity from 5 to >200 were observed. In terms of productivity, continuous-flow mode reactions were superior in both strategies (acylation: r from 1.1 up to 18.1-fold higher, deacylation: 2.8 up to 7.4- fold higher in continuous-flow than in batch mode).
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14
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Bhardwaj KK, Gupta R. Synthesis of Chirally Pure Enantiomers by Lipase. J Oleo Sci 2017; 66:1073-1084. [DOI: 10.5650/jos.ess17114] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
| | - Reena Gupta
- Department of Biotechnology, Himachal Pradesh University
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15
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Thomas JC, Aggio BB, Marques de Oliveira AR, Piovan L. High-Throughput Preparation of Optically Active Cyanohydrins Mediated by Lipases. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
| | | | | | - Leandro Piovan
- Department of Chemistry; Universidade Federal do Paraná; Paraná Brazil
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16
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Jadhav DD, Patil HS, Chaya PS, Thulasiram HV. Fungal mediated kinetic resolution of racemic acetates to ( R )-alcohols using Fusarium proliferatum. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.08.084] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Michalak K, Wicha J, Wójcik J. Studies towards dynamic kinetic resolution of 4-hydroxy-2-methylcyclopent-2-en-1-one and its E - O -trityloxime. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.06.047] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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18
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Ismail T, Shafi S, Singh S, Sidiq T, Khajuria A, Rouf A, Yadav M, Saikam V, Singh PP, Alam MS, Islam N, Sharma K, Kumar HMS. Synthesis and immunopotentiating activity of novel isoxazoline functionalized coumarins. Eur J Med Chem 2016; 123:90-104. [PMID: 27474926 DOI: 10.1016/j.ejmech.2016.07.026] [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: 01/11/2016] [Revised: 06/29/2016] [Accepted: 07/12/2016] [Indexed: 10/21/2022]
Abstract
A novel series (13) of isoxazoline functionalized coumarins was synthesized through 1,3-dipolar cyclization of nitrile oxides with Allylated coumarins. Synthesis of effective and target selective immunostimulators through conjugation of diversely substituted isoxazolines and 7-hydroxycoumarins is the focus of the present article. The proposed synthetic scheme was observed to be highly regiospecific yielding attempted conjugates in good yield (>90%). Kinetic resolution of the racemates was carried out by employing lipase B from Candida antarctica (CALB). The synthesized compounds were screened in vitro and in vivo for their biological activities viz. toxicity and impact on splenocyte proliferation (T- and B-cell proliferation), antibody production (HA titre), delayed-type hypersensitivity reaction (DTH), T-cell subtypes (CD4 and CD8), cytokine production (IL-2, IFN-γ, and IL-4) and NO (macrophage) production. Our results establish that isoxazoline functionalized coumarins exhibit excellent immune potentiating activity especially compounds 2, 4 and 8 whose activity is more than that of Levimasole as standard. The structure activity relations are explained in light of the structural/functional aspects of tested compounds. To the best of our knowledge the presented work is first of its kind and is presaged to prove very useful for the design and synthesis of bis-heterocycle based novel, therapeutically selective and effective immunopotentiators.
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Affiliation(s)
- Tabasum Ismail
- Medicinal Chemistry Division, Indian Institute of Integrative Medicine, Jammu, India.
| | - Syed Shafi
- Department of Chemistry, Jamia Hamdard University, New Delhi, India
| | - Swarn Singh
- Medicinal Chemistry Division, Indian Institute of Integrative Medicine, Jammu, India
| | - Tabasum Sidiq
- Medicinal Chemistry Division, Indian Institute of Integrative Medicine, Jammu, India
| | - Anamika Khajuria
- Medicinal Chemistry Division, Indian Institute of Integrative Medicine, Jammu, India
| | - Abdul Rouf
- Medicinal Chemistry Division, Indian Institute of Integrative Medicine, Jammu, India
| | - Mahipal Yadav
- Medicinal Chemistry Division, Indian Institute of Integrative Medicine, Jammu, India
| | - Varma Saikam
- Medicinal Chemistry Division, Indian Institute of Integrative Medicine, Jammu, India
| | - Parvinder Pal Singh
- Medicinal Chemistry Division, Indian Institute of Integrative Medicine, Jammu, India
| | | | - Nasarul Islam
- Department of Chemistry, Guru Nanak Dev University, Amritsar, India
| | - Kalicharan Sharma
- Department of Pharmaceutical Chemistry, Jamia Hamdard University, New Delhi, India
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19
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Bandeira PT, Alnoch RC, de Oliveira AR, de Souza EM, de O. Pedrosa F, Krieger N, Piovan L. Enzymatic kinetic resolution of aliphatic sec -alcohols by LipG9, a metagenomic lipase. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcatb.2015.12.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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20
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Biocatalysis and biotransformation in Brazil: An overview. Biotechnol Adv 2015; 33:481-510. [PMID: 25687277 DOI: 10.1016/j.biotechadv.2015.02.001] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Revised: 02/05/2015] [Accepted: 02/05/2015] [Indexed: 12/12/2022]
Abstract
This review presents the recent research in biocatalysis and biotransformation in Brazil. Several substrates were biotransformed by fungi, bacteria and plants. Biocatalytic deracemization of secondary alcohols, oxidation of sulfides, sp(3) CH hydroxylation and epoxidation of alkenes were described. Chemo-enzymatic resolution of racemic alcohols and amines were carried out with lipases using several substrates containing heteroatoms such as silicon, boron, selenium and tellurium. Biotransformation of nitriles by marine fungi, hydrolysis of epoxides by microorganisms of Brazilian origin and biooxidation of natural products were described. Enzymatic reactions under microwave irradiation, continuous flow, and enzymatic assays using fluorescent probes were reported.
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21
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Michalak K, Wicha J. A convenient preparation of (S)-(−)-4-hydroxy-2-methylcyclopent-2-en-1-one and its application as a chiral synthetic equivalent of 2-methylcyclopent-2-en-1-one in the terpenoid synthesis. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.06.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Frelek J, Karchier M, Madej D, Michalak K, Różański P, Wicha J. Chemoenzymatic Approach to Optically Active 4-Hydroxy-5-alkylcyclopent-2-en-1-one Derivatives: An Application of a Combined Circular Dichroism Spectroscopy and DFT Calculations to Assignment of Absolute Configuration. Chirality 2014; 26:300-6. [DOI: 10.1002/chir.22322] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2013] [Accepted: 02/27/2014] [Indexed: 11/10/2022]
Affiliation(s)
- Jadwiga Frelek
- Institute of Organic Chemistry of the Polish Academy of Sciences; Warsaw Poland
| | - Michał Karchier
- Institute of Organic Chemistry of the Polish Academy of Sciences; Warsaw Poland
| | - Daria Madej
- Institute of Organic Chemistry of the Polish Academy of Sciences; Warsaw Poland
| | - Karol Michalak
- Institute of Organic Chemistry of the Polish Academy of Sciences; Warsaw Poland
| | - Paweł Różański
- Institute of Organic Chemistry of the Polish Academy of Sciences; Warsaw Poland
| | - Jerzy Wicha
- Institute of Organic Chemistry of the Polish Academy of Sciences; Warsaw Poland
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Enzymatic resolution by CALB of organofluorine compounds under conventional condition and microwave irradiation. J Fluor Chem 2013. [DOI: 10.1016/j.jfluchem.2013.06.014] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Dinica RM, Furdui B, Ghinea IO, Bahrim G, Bonte S, Demeunynck M. Novel one-pot green synthesis of indolizines biocatalysed by Candida antarctica Lipases. Mar Drugs 2013; 11:431-9. [PMID: 23389089 PMCID: PMC3640390 DOI: 10.3390/md11020431] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2012] [Revised: 01/29/2013] [Accepted: 01/29/2013] [Indexed: 11/16/2022] Open
Abstract
Marine microorganisms are of considerable interest as a promising source of enzymes with unsuspected potentials as catalysts for chemical synthesis. We describe here an efficient method for one-pot indolizine synthesis that has been developed using lipase A and lipase B from Candida antarctica as biocatalysts. As showed by HPLC/MS analysis, the yield in indolizines was higher in the presence of the biocatalyst than in absence of enzyme. Lipase A, from Candida antarctica, showed high catalytic activity and selectivity for the cycloaddition reactions. When the reactions were performed under ultrasound irradiation, the Candida antarctica lipase catalyzed reactions yielded pure indolozines, in good yields and in very short time.
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Affiliation(s)
- Rodica Mihaela Dinica
- Department of Chemistry, Physics and Environment, Faculty of Science and Environment, “Dunarea de Jos” University of Galati, 111 Domneasca Street, Galati 800201, Romania; E-Mail:
| | - Bianca Furdui
- Department of Chemistry, Physics and Environment, Faculty of Science and Environment, “Dunarea de Jos” University of Galati, 111 Domneasca Street, Galati 800201, Romania; E-Mail:
- Authors to whom correspondence should be addressed; E-Mails: (B.F.); (M.D.); Tel.: +40-336-130-251 (B.F.); Fax: +40-336-130-285 (B.F.); Tel.: +33-476-635-314 (M.D.); Fax: +33-476-635-298 (M.D.)
| | - Ioana Otilia Ghinea
- Department of Food Science, Food Engineering and Applied Biotechnology, Faculty of Food Science and Engineering, “Dunarea de Jos” University of Galati, 111 Domneasca Street, Galati 800201, Romania; E-Mails: (I.O.G.); (G.B.)
| | - Gabriela Bahrim
- Department of Food Science, Food Engineering and Applied Biotechnology, Faculty of Food Science and Engineering, “Dunarea de Jos” University of Galati, 111 Domneasca Street, Galati 800201, Romania; E-Mails: (I.O.G.); (G.B.)
| | - Simon Bonte
- Département Pharmacochimie Moléculaire, UMR 5063 & FR 2607, CNRS/Université de Grenoble, 38041 Grenoble cedex 9, France; E-Mail:
| | - Martine Demeunynck
- Département Pharmacochimie Moléculaire, UMR 5063 & FR 2607, CNRS/Université de Grenoble, 38041 Grenoble cedex 9, France; E-Mail:
- Authors to whom correspondence should be addressed; E-Mails: (B.F.); (M.D.); Tel.: +40-336-130-251 (B.F.); Fax: +40-336-130-285 (B.F.); Tel.: +33-476-635-314 (M.D.); Fax: +33-476-635-298 (M.D.)
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