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Zhao F, Lauder K, Liu S, Finnigan JD, Charnock SBR, Charnock SJ, Castagnolo D. Chemoenzymatic Cascades for the Enantioselective Synthesis of β-Hydroxysulfides Bearing a Stereocentre at the C-O or C-S Bond by Ketoreductases. Angew Chem Int Ed Engl 2022; 61:e202202363. [PMID: 35576553 DOI: 10.1002/anie.202202363] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Indexed: 12/17/2022]
Abstract
Chiral β-hydroxysulfides are an important class of organic compounds which find broad application in organic and pharmaceutical chemistry. Herein we describe the development of novel biocatalytic and chemoenzymatic methods for the enantioselective synthesis of β-hydroxysulfides by exploiting ketoreductase (KRED) enzymes. Four KREDs were discovered from a pool of 384 enzymes identified and isolated through a metagenomic approach. KRED311 and KRED349 catalysed the synthesis of β-hydroxysulfides bearing a stereocentre at the C-O bond with opposite absolute configurations and excellent ee values by novel chemoenzymatic and biocatalytic-chemical-biocatalytic (bio-chem-bio) cascades starting from commercially available thiophenols/thiols and α-haloketones/alcohols. KRED253 and KRED384 catalysed the enantioselective synthesis of β-hydroxysulfides bearing a stereocentre at the C-S bond with opposite enantioselectivities by dynamic kinetic resolution (DKR) of racemic α-thioaldehydes.
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Affiliation(s)
- Fei Zhao
- School of Cancer and Pharmaceutical Sciences, King's College London, 150 Stamford Street, London, SE1 9NH, UK.,Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
| | - Kate Lauder
- School of Cancer and Pharmaceutical Sciences, King's College London, 150 Stamford Street, London, SE1 9NH, UK
| | - Siyu Liu
- School of Cancer and Pharmaceutical Sciences, King's College London, 150 Stamford Street, London, SE1 9NH, UK
| | - James D Finnigan
- Prozomix Limited, West End Ind. Estate, Haltwhistle, Northumberland, NE49 9HA, UK
| | - Simon B R Charnock
- Prozomix Limited, West End Ind. Estate, Haltwhistle, Northumberland, NE49 9HA, UK
| | - Simon J Charnock
- Prozomix Limited, West End Ind. Estate, Haltwhistle, Northumberland, NE49 9HA, UK
| | - Daniele Castagnolo
- School of Cancer and Pharmaceutical Sciences, King's College London, 150 Stamford Street, London, SE1 9NH, UK.,Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK
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Zhao F, Lauder K, Liu S, Finnigan JD, Charnock SBR, Charnock SJ, Castagnolo D. Chemoenzymatic Cascades for the Enantioselective Synthesis of β‐Hydroxysulfides Bearing a Stereocentre at C− O or C − S Bonds by Ketoreductases (KREDs). Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Fei Zhao
- University College London Chemistry UNITED KINGDOM
| | - Kate Lauder
- King's College London Cancer and Pharmaceutical Sciences UNITED KINGDOM
| | - Siyu Liu
- King's College London Cancer and Pharmaceutical Sciences UNITED KINGDOM
| | | | | | | | - Daniele Castagnolo
- University College London Chemistry 20 Gordon Street WC1H 0AJ London UNITED KINGDOM
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3
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Komatsuda M, Ohki H, Kondo H, Suto A, Yamaguchi J. Ring-Opening Fluorination of Isoxazoles. Org Lett 2022; 24:3270-3274. [PMID: 35471036 DOI: 10.1021/acs.orglett.2c01149] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A ring-opening fluorination of isoxazoles has been developed. Upon treatment of isoxazoles with an electrophilic fluorinating agent (Selectfluor), fluorination followed by deprotonation leads to tertiary fluorinated carbonyl compounds. This method features mild reaction conditions, good functional group tolerance, and a simple experimental procedure. Diverse transformations of the resulting α-fluorocyanoketones were also demonstrated, furnishing a variety of fluorinated compounds.
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Affiliation(s)
- Masaaki Komatsuda
- Department of Applied Chemistry, Waseda University, 513 Wasedatsurumakicho, Shinjuku, Tokyo 162-0041, Japan
| | - Hugo Ohki
- Department of Applied Chemistry, Waseda University, 513 Wasedatsurumakicho, Shinjuku, Tokyo 162-0041, Japan
| | - Hiroki Kondo
- Department of Applied Chemistry, Waseda University, 513 Wasedatsurumakicho, Shinjuku, Tokyo 162-0041, Japan
| | - Ayane Suto
- Department of Applied Chemistry, Waseda University, 513 Wasedatsurumakicho, Shinjuku, Tokyo 162-0041, Japan
| | - Junichiro Yamaguchi
- Department of Applied Chemistry, Waseda University, 513 Wasedatsurumakicho, Shinjuku, Tokyo 162-0041, Japan
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Ali R, Ahmed W, Jayant V, alvi S, Ahmed N, Ahmed A. Metathesis reactions in total‐ and natural product fragments syntheses. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100753] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rashid Ali
- Jamia Millia Islamia New Delhi India 110025 Department of Chemistry Jamia Nagar,New Delhi india110025 110025 New Delhi INDIA
| | - Waqar Ahmed
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
| | - Vikrant Jayant
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
| | - shakeel alvi
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
| | - Nadeem Ahmed
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
| | - Azeem Ahmed
- Jamia Millia Islamia Central University: Jamia Millia Islamia Chemistry INDIA
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Komatsuda M, Suto A, Kondo H, Takada H, Kato K, Saito B, Yamaguchi J. Ring-opening fluorination of bicyclic azaarenes. Chem Sci 2022; 13:665-670. [PMID: 35173930 PMCID: PMC8768879 DOI: 10.1039/d1sc06273e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 12/21/2021] [Indexed: 02/03/2023] Open
Abstract
We have discovered a ring-opening fluorination of bicyclic azaarenes. Upon treatment of bicyclic azaarenes such as pyrazolo[1,5-a]pyridines with electrophilic fluorinating agents, fluorination of the aromatic ring is followed by a ring-opening reaction. Although this overall transformation can be classified as an electrophilic fluorination of an aromatic ring, it is a novel type of fluorination that results in construction of tertiary carbon-fluorine bonds. The present protocol can be applied to a range of bicyclic azaarenes, tolerating azines and a variety of functional groups. Additionally, mechanistic studies and enantioselective fluorination have been examined.
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Affiliation(s)
- Masaaki Komatsuda
- Department of Applied Chemistry, Waseda University 513, Wasedatsurumakicho, Shinjuku Tokyo 169-8555 Japan
| | - Ayane Suto
- Department of Applied Chemistry, Waseda University 513, Wasedatsurumakicho, Shinjuku Tokyo 169-8555 Japan
| | - Hiroki Kondo
- Department of Applied Chemistry, Waseda University 513, Wasedatsurumakicho, Shinjuku Tokyo 169-8555 Japan
| | - Hiroyuki Takada
- Research, Takeda Pharmaceutical Company Limited 26-1, Muraoka-Higashi 2-chome Fujisawa Kanagawa 251-8555 Japan
| | - Kenta Kato
- Department of Applied Chemistry, Waseda University 513, Wasedatsurumakicho, Shinjuku Tokyo 169-8555 Japan
| | - Bunnai Saito
- Research, Takeda Pharmaceutical Company Limited 26-1, Muraoka-Higashi 2-chome Fujisawa Kanagawa 251-8555 Japan
| | - Junichiro Yamaguchi
- Department of Applied Chemistry, Waseda University 513, Wasedatsurumakicho, Shinjuku Tokyo 169-8555 Japan
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Kajetanowicz A, Grela K. Nitro and Other Electron Withdrawing Group Activated Ruthenium Catalysts for Olefin Metathesis Reactions. Angew Chem Int Ed Engl 2021; 60:13738-13756. [PMID: 32808704 PMCID: PMC8246989 DOI: 10.1002/anie.202008150] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Indexed: 01/05/2023]
Abstract
Advanced applications of the Nobel Prize winning olefin metathesis reaction require user-friendly and highly universal catalysts. From many successful metathesis catalysts, which belong to the two distinct classes of Schrock and Grubbs-type catalysts, the subclass of chelating-benzylidene ruthenium complexes (so-called Hoveyda-Grubbs catalysts) additionally activated by electron-withdrawing groups (EWGs) provides a highly tunable platform. In the Review, the origin of the EWG-activation concept and selected applications of the resulting catalysts in target-oriented synthesis, medicinal chemistry, as well as in the preparation of fine-chemicals and in materials chemistry is discussed. Based on the examples, some suggestions for end-users regarding minimization of catalyst loading, selectivity control, and general optimization of the olefin metathesis reaction are provided.
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Affiliation(s)
- Anna Kajetanowicz
- Laboratory of Organometallic SynthesisFaculty of ChemistryBiological and Chemical Research CentreUniversity of WarsawŻwirki i Wigury 10102-089WarsawPoland
| | - Karol Grela
- Laboratory of Organometallic SynthesisFaculty of ChemistryBiological and Chemical Research CentreUniversity of WarsawŻwirki i Wigury 10102-089WarsawPoland
- Institute of Organic ChemistryPolish Academy of SciencesKasprzaka 44/5201-224WarsawPoland
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Kajetanowicz A, Grela K. Durch Nitro‐ und andere elektronenziehende Gruppen aktivierte Ruthenium‐Katalysatoren für die Olefinmetathese. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202008150] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Anna Kajetanowicz
- Labor für Organometall-Synthese Fakultät für Chemie Biological and Chemical Research Centre Universität Warschau Żwirki i Wigury 101 02-089 Warschau Polen
| | - Karol Grela
- Labor für Organometall-Synthese Fakultät für Chemie Biological and Chemical Research Centre Universität Warschau Żwirki i Wigury 101 02-089 Warschau Polen
- Institut für Organische Chemie Polish Academy of Sciences Kasprzaka 44/52 01-224 Warschau Polen
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Harmange Magnani CS, Maimone TJ. Dearomative Synthetic Entry into the Altemicidin Alkaloids. J Am Chem Soc 2021; 143:7935-7939. [PMID: 34018391 DOI: 10.1021/jacs.1c04147] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Altemicidin and related Streptomyces-derived monoterpene alkaloids possess dense, highly polar azaindane cores as well as potent cytotoxic and tRNA synthetase inhibitory properties. The congested α-amino acid motif decorating their presumed iridoid-like core structure has proven to be both a synthetic challenge and a biosynthetic mystery to date. Herein, we report a distinct, abiotic strategy to these alkaloids resulting in a concise synthesis of altemicidin from simple chemical feedstocks. Key chemical findings include the exploitation of a dearomative pyridinium addition and dipolar cycloaddition sequence to stereospecifically install the quaternary amine moiety, and a chemoselective molybdenum-mediated double reduction to establish the fully functionalized azaindane nucleus with minimal redox manipulations.
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Affiliation(s)
- Claire S Harmange Magnani
- Department of Chemistry, University of California-Berkeley, 826 Latimer Hall, Berkeley, California 94720, United States
| | - Thomas J Maimone
- Department of Chemistry, University of California-Berkeley, 826 Latimer Hall, Berkeley, California 94720, United States
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Justaud F, Hachem A, Grée R. Recent Developments in the Meyer‐Schuster Rearrangement. European J Org Chem 2021. [DOI: 10.1002/ejoc.202001494] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Frédéric Justaud
- Univ Rennes CNRS (Institut for Chemical Sciences in Rennes), UMR 6226 35000 Rennes France
| | - Ali Hachem
- Lebanese University Faculty of Sciences (I) Laboratory for Medidinal Chemistry and Natural Products and PRASE-EDST Hadath Lebanon
| | - René Grée
- Univ Rennes CNRS (Institut for Chemical Sciences in Rennes), UMR 6226 35000 Rennes France
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Campeau D, León Rayo DF, Mansour A, Muratov K, Gagosz F. Gold-Catalyzed Reactions of Specially Activated Alkynes, Allenes, and Alkenes. Chem Rev 2020; 121:8756-8867. [DOI: 10.1021/acs.chemrev.0c00788] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Dominic Campeau
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - David F. León Rayo
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - Ali Mansour
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - Karim Muratov
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
| | - Fabien Gagosz
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, K1N 6N5 Ottawa, Canada
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Khademi Z, Nikoofar K. Applications of alkyl orthoesters as valuable substrates in organic transformations, focusing on reaction media. RSC Adv 2020; 10:30314-30397. [PMID: 35559005 PMCID: PMC9092620 DOI: 10.1039/d0ra05276k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 07/27/2020] [Indexed: 02/01/2023] Open
Abstract
In this review we focus on applications of alkyl orthoesters as valuable and efficient substrates to perform various classes of two-component and multi-component organic reactions. The article has classified them according to two aspects, which are: (i) a focus on the reaction medium (solvent-free conditions, aqueous media, and organic solvents); and (ii) an examination of product structures. Reaction accomplishment under solvent-free conditions is an eco-friendly process with the absence of volatile toxic solvents, which puts it in line with green chemistry goals. Water is an interesting choice in organic transformations due to its inexpensiveness and safety. The authors hope their assessment will help chemists to attain new approaches for utilizing alkyl orthoesters in various organic synthetic methods. The review covers the corresponding literature up to the beginning of 2020.
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Affiliation(s)
- Zahra Khademi
- Department of Chemistry, Faculty of Physics & Chemistry, Alzahra University P.O. Box 1993891176 Tehran Iran +982188041344 +982188041344
| | - Kobra Nikoofar
- Department of Chemistry, Faculty of Physics & Chemistry, Alzahra University P.O. Box 1993891176 Tehran Iran +982188041344 +982188041344
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Ramdular A, Woerpel KA. Using Neighboring-Group Participation for Acyclic Stereocontrol in Diastereoselective Substitution Reactions of Acetals. Org Lett 2020; 22:4113-4117. [PMID: 32392075 PMCID: PMC7337985 DOI: 10.1021/acs.orglett.0c01166] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Neighboring-group participation of an ester enabled stereocontrol in substitution reactions of acyclic acetals. The ester group formed a trans-fused dioxolenium ion intermediate, which underwent a substitution reaction at the acetal carbon atom to afford the product with high diastereoselectivity. Neighboring-group participation was confirmed by isolating dioxolane products resulting from nucleophilic addition at C-2 of a 1,3-dioxolenium ion intermediate. Using a pivaloate ester as the participating group in combination with strong nucleophiles produced substitution products with diastereoselectivities of ≥90:10.
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Affiliation(s)
- Amanda Ramdular
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY 10003 (USA)
| | - K. A. Woerpel
- Department of Chemistry, New York University, 100 Washington Square East, New York, NY 10003 (USA)
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Naka H, Naraoka A. Recent advances in transfer hydration of nitriles with amides or aldoximes. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2019.151557] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2018. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.213051] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Toplishek M, Žagar E, Pahovnik D. Synthesis of dicyano-substituted ε-caprolactone and its (co)polymers. Eur Polym J 2019. [DOI: 10.1016/j.eurpolymj.2019.08.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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