1
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Adhikari AS, Majumdar N. Unconventional Reactivity of a Grubbs Catalyst: Hydroalkylation Overriding Metathesis. Org Lett 2023. [PMID: 38029292 DOI: 10.1021/acs.orglett.3c03456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
Unprecedented reactivity of a Grubbs catalyst has been disclosed in a reaction between vinyl azaarenes and alkenylnitriles under standard metathesis conditions. No metathesis was observed; only hydroalkylation products were obtained in high yields. The practical utility of this method has been demonstrated by the application of the products in useful transformations, e.g., the formation of cyclic iminoesters and highly challenging medium-sized carbocycles.
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Affiliation(s)
- Amit Singh Adhikari
- Medicinal and Process Chemistry Division, Central Drug Research Institute (CSIR), Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173, Lucknow, Uttar Pradesh 226031, India
| | - Nilanjana Majumdar
- Medicinal and Process Chemistry Division, Central Drug Research Institute (CSIR), Sector 10, Jankipuram Extension, Sitapur Road, P.O. Box 173, Lucknow, Uttar Pradesh 226031, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, Uttar Pradesh 201002, India
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2
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Lai HE, Obled AMC, Chee SM, Morgan RM, Lynch R, Sharma SV, Moore SJ, Polizzi KM, Goss RJM, Freemont PS. GenoChemetic Strategy for Derivatization of the Violacein Natural Product Scaffold. ACS Chem Biol 2021; 16:2116-2123. [PMID: 34648268 PMCID: PMC8609527 DOI: 10.1021/acschembio.1c00483] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Natural products and their analogues are often challenging to synthesize due to their complex scaffolds and embedded functional groups. Solely relying on engineering the biosynthesis of natural products may lead to limited compound diversity. Integrating synthetic biology with synthetic chemistry allows rapid access to much more diverse portfolios of xenobiotic compounds, which may accelerate the discovery of new therapeutics. As a proof-of-concept, by supplementing an Escherichia coli strain expressing the violacein biosynthesis pathway with 5-bromo-tryptophan in vitro or tryptophan 7-halogenase RebH in vivo, six halogenated analogues of violacein or deoxyviolacein were generated, demonstrating the promiscuity of the violacein biosynthesis pathway. Furthermore, 20 new derivatives were generated from 5-brominated violacein analogues via the Suzuki-Miyaura cross-coupling reaction directly using the crude extract without prior purification. Herein we demonstrate a flexible and rapid approach to access a diverse chemical space that can be applied to a wide range of natural product scaffolds.
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Affiliation(s)
- Hung-En Lai
- Section of Structural and Synthetic Biology, Department of Infectious Disease, Imperial College London, London SW7 2AZ, U.K
| | - Alan M. C. Obled
- School of Chemistry and Biomedical Sciences Research Complex, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, U.K
| | - Soo Mei Chee
- Section of Structural and Synthetic Biology, Department of Infectious Disease, Imperial College London, London SW7 2AZ, U.K
- London Biofoundry, Imperial College Translation & Innovation Hub, London W12 0BZ, U.K
| | - Rhodri M. Morgan
- Department of Life Sciences, Imperial College London, London SW7 2AZ, U.K
| | - Rosemary Lynch
- School of Chemistry and Biomedical Sciences Research Complex, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, U.K
| | - Sunil V. Sharma
- School of Chemistry and Biomedical Sciences Research Complex, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, U.K
| | - Simon J. Moore
- Section of Structural and Synthetic Biology, Department of Infectious Disease, Imperial College London, London SW7 2AZ, U.K
| | - Karen M. Polizzi
- Department of Chemical Engineering, Imperial College London, London SW7 2AZ, U.K
| | - Rebecca J. M. Goss
- School of Chemistry and Biomedical Sciences Research Complex, University of St Andrews, North Haugh, St Andrews, Fife KY16 9ST, U.K
| | - Paul S. Freemont
- Section of Structural and Synthetic Biology, Department of Infectious Disease, Imperial College London, London SW7 2AZ, U.K
- London Biofoundry, Imperial College Translation & Innovation Hub, London W12 0BZ, U.K
- UK DRI Care Research and Technology Centre, Imperial College London, Hammersmith Campus, Du Cane Road, London W12 0NN, U.K
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3
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Park H, Park S, Yang YH, Choi KY. Microbial synthesis of violacein pigment and its potential applications. Crit Rev Biotechnol 2021; 41:879-901. [PMID: 33730942 DOI: 10.1080/07388551.2021.1892579] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Violacein is a pigment synthesized by Gram-negative bacteria such as Chromobacterium violaceum. It has garnered significant interest owing to its unique physiological and biological activities along with its synergistic effects with various antibiotics. In addition to C. violaceum, several microorganisms, including: Duganella sp., Pseudoalteromonas sp., Iodobacter sp., and Massilia sp., are known to produce violacein. Along with the identification of violacein-producing strains, the genetic regulation, quorum sensing mechanism, and sequence of the vio-operon involved in the biosynthesis of violacein have been elucidated. From an engineering perspective, the heterologous production of violacein using the genetically engineered Escherichia coli or Citrobacter freundii host has also been attempted. Genetic engineering of host cells involves the heterologous expression of genes involved in the vio operon and the optimization of metabolic pathways and gene regulation. Further, the crystallography of VioD and VioE was revealed, and mass production by enzyme engineering has been accelerated. In this review, we highlight the biologically assisted end-use applications of violacein (such as functional fabric development, nanoparticles, functional polymer composites, and sunscreen ingredients) and violacein activation mechanisms, production strains, and the results of mass production with engineered methods. The prospects for violacein research and engineering applications have also been discussed.
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Affiliation(s)
- HyunA Park
- Department of Environmental Engineering, College of Engineering, Ajou University, Suwon, South Korea
| | - SeoA Park
- Department of Environmental Engineering, College of Engineering, Ajou University, Suwon, South Korea
| | - Yung-Hun Yang
- Department of Biological Engineering, College of Engineering, Konkuk University, Seoul, South Korea
| | - Kwon-Young Choi
- Department of Environmental Engineering, College of Engineering, Ajou University, Suwon, South Korea.,Department of Environmental and Safety Engineering, College of Engineering, Ajou University, Suwon, South Korea
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4
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Mandal S, Banerjee J, Maity S, Chattopadhyay SK. Sequential Two‐Fold
Claisen
Rearrangement, One‐Pot Ring‐Closing Metathesis and Cross‐Metathesis as a Route to Substituted Benzo[
b
]azepine‐2‐one, Benzo[
b
]azepine and Benzo[
b
]oxepine Derivatives. Helv Chim Acta 2021. [DOI: 10.1002/hlca.202000216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Shyamasankar Mandal
- Department of Chemistry University of Kalyani Kalyani 741235 West Bengal India
| | - Jeet Banerjee
- Department of Chemistry University of Kalyani Kalyani 741235 West Bengal India
| | - Sougata Maity
- Department of Chemistry University of Kalyani Kalyani 741235 West Bengal India
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5
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Brodzka A, Koszelewski D, Ostaszewski R. Dual Activity of Grubbs-Type Catalyst in the Transvinylation of Carboxylic Acids and Ring-Closing Metathesis Reactions. J Org Chem 2020; 85:15305-15313. [PMID: 33196209 PMCID: PMC7735734 DOI: 10.1021/acs.joc.0c02135] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Indexed: 11/30/2022]
Abstract
The development of a multifunctional catalyst, which mimics the promiscuity of enzymes, that would catalyze more than one chemical transformation in a single reaction vessel is one of the key points of modern sustainable chemistry. The results of our experiments indicated that Grubbs-type catalysts possess such multitask activity, catalyzing the transvinylation reaction of carboxylic acids without losing their original metathetic activity. This new activity of Grubbs catalysts was evidenced on several examples. It allows us to design a transvinylation/ring-closing metathesis (RCM) cascade reaction leading to the formation of endocyclic enol lactones from unsaturated carboxylic acids in an one-pot procedure. This unique ability of Grubbs catalyst to catalyze multiple mechanically distinct cascade reactions in a chemoselective way offers the new possibility for the synthesis of complex compounds from simple, easily accessible substrates.
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Affiliation(s)
- Anna Brodzka
- Institute of Organic Chemistry
Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
| | - Dominik Koszelewski
- Institute of Organic Chemistry
Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
| | - Ryszard Ostaszewski
- Institute of Organic Chemistry
Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warszawa, Poland
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6
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Wilkinson MD, Lai HE, Freemont PS, Baum J. A Biosynthetic Platform for Antimalarial Drug Discovery. Antimicrob Agents Chemother 2020; 64:e02129-19. [PMID: 32152076 PMCID: PMC7179595 DOI: 10.1128/aac.02129-19] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 02/23/2020] [Indexed: 01/12/2023] Open
Abstract
Advances in synthetic biology have enabled the production of a variety of compounds using bacteria as a vehicle for complex compound biosynthesis. Violacein, a naturally occurring indole pigment with antibiotic properties, can be biosynthetically engineered in Escherichia coli expressing its nonnative synthesis pathway. To explore whether this synthetic biosynthesis platform could be used for drug discovery, here we have screened bacterially derived violacein against the main causative agent of human malaria, Plasmodium falciparum We show the antiparasitic activity of bacterially derived violacein against the P. falciparum 3D7 laboratory reference strain as well as drug-sensitive and -resistant patient isolates, confirming the potential utility of this drug as an antimalarial agent. We then screen a biosynthetic series of violacein derivatives against P. falciparum growth. The varied activity of each derivative against asexual parasite growth points to the need to further develop violacein as an antimalarial. Towards defining its mode of action, we show that biosynthetic violacein affects the parasite actin cytoskeleton, resulting in an accumulation of actin signal that is independent of actin polymerization. This activity points to a target that modulates actin behavior in the cell either in terms of its regulation or its folding. More broadly, our data show that bacterial synthetic biosynthesis could become a suitable platform for antimalarial drug discovery, with potential applications in future high-throughput drug screening with otherwise chemically intractable natural products.
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Affiliation(s)
- Mark D Wilkinson
- Department of Chemistry, Imperial College London, London, United Kingdom
| | - Hung-En Lai
- Department of Infectious Diseases, Faculty of Medicine, Imperial College London, London, United Kingdom
| | - Paul S Freemont
- Department of Infectious Diseases, Faculty of Medicine, Imperial College London, London, United Kingdom
- UK Dementia Research Institute Care Research and Technology Centre, Imperial College London, United Kingdom
| | - Jake Baum
- Department of Life Sciences, Imperial College London, London, United Kingdom
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7
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Catalytic Asymmetric Formal [3+2] Cycloaddition of Azoalkenes with 3-Vinylindoles: Synthesis of 2,3-Dihydropyrroles. iScience 2020; 23:100873. [PMID: 32062452 PMCID: PMC7021545 DOI: 10.1016/j.isci.2020.100873] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 01/13/2020] [Accepted: 01/27/2020] [Indexed: 12/17/2022] Open
Abstract
Chiral phosphoric acid-catalyzed highly enantioselective formal [3 + 2] cycloaddition reaction of azoalkenes with 3-vinylindoles has been established. Under mild conditions, the projected cycloaddition proceeded smoothly, affording a variety of 2,3-dihydropyrroles in high yields and excellent enantioselectivities, and also in a diastereospecific manner. As opposed to the common 4-atom synthons in the previous literature reports, azoalkenes served as 3-atom synthons. Besides, the observed selectivity was supported by primary theoretical calculation. The unique chemistry of azoalkenes disclosed herein will empower asymmetric synthesis of nitrogen-containing ring structural motifs in a broader context. Chiral phosphoric acid catalyzed formal [3 + 2] cycloaddition reaction 2,3-Dihydropyrroles were enantioselectively synthesized Azoalkenes served as 3-atom synthons
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8
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Romaniszyn M, Sieroń L, Albrecht Ł. Asymmetric vinylogous Michael addition of 5-substituted-furan-2(3H)-ones to an α,β-unsaturated-γ-lactam. Org Biomol Chem 2020; 18:8633-8637. [DOI: 10.1039/d0ob01750g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Asymmetric vinylogous Michael addition involving an α,β-unsaturated-γ-lactam as an acceptor is described.
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Affiliation(s)
- Marta Romaniszyn
- Institute of Organic Chemistry
- Faculty of Chemistry
- Lodz University of Technology
- 90-924 Łódź
- Poland
| | - Lesław Sieroń
- Institute of General and Ecological Chemistry
- Faculty of Chemistry
- Lodz University of Technology
- 90-924 Łódź
- Poland
| | - Łukasz Albrecht
- Institute of Organic Chemistry
- Faculty of Chemistry
- Lodz University of Technology
- 90-924 Łódź
- Poland
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9
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Montagnon T, Kalaitzakis D, Sofiadis M, Vassilikogiannakis G. The reticent tautomer: exploiting the interesting multisite and multitype reactivity of 4-pyrrolin-2-ones. Org Biomol Chem 2020; 18:180-190. [DOI: 10.1039/c9ob02471a] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Multisite and multitype reactivities of the highly versatile and valuable synthetic building block 4-pyrrolin-2-one are covered in this review.
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10
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Iio K, Sachimori S, Watanabe T, Fuwa H. Ruthenium-Catalyzed Intramolecular Double Hydroalkoxylation of Internal Alkynes. Org Lett 2018; 20:7851-7855. [PMID: 30517018 DOI: 10.1021/acs.orglett.8b03368] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Intramolecular double hydroalkoxylation of internal alkynes could be achieved using a Grubbs-type ruthenium carbene complex or its modified species to deliver a series of bridged- and spiroacetal derivatives in moderate to good yields. This study represents a new example of nonmetathetic reactions catalyzed by Grubbs-type ruthenium carbene complexes.
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Affiliation(s)
- Kei Iio
- Department of Applied Chemistry, Faculty of Science and Engineering , Chuo University , 1-13-27 Kasuga , Bunkyo-ku, Tokyo 112-8551 , Japan
| | - Shusuke Sachimori
- Graduate School of Life Sciences , Tohoku University , 2-1-1 Katahira , Aoba-ku, Sendai 980-8577 , Japan
| | - Tomomi Watanabe
- Graduate School of Life Sciences , Tohoku University , 2-1-1 Katahira , Aoba-ku, Sendai 980-8577 , Japan
| | - Haruhiko Fuwa
- Department of Applied Chemistry, Faculty of Science and Engineering , Chuo University , 1-13-27 Kasuga , Bunkyo-ku, Tokyo 112-8551 , Japan
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11
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Krompiec S, Marcol B, Zych D, Kurpanik A, Danikiewicz W, Matussek M, Kuźnik N. Crown Ether Base: Highly Active, Regioselective and Reusable Catalytic Systems for Double Bond Migration in Allylic Compounds. ChemistrySelect 2017. [DOI: 10.1002/slct.201700904] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Stanisław Krompiec
- Faculty of Mathematics, Physics and Chemistry; Institute of Chemistry; University of Silesia; Szkolna 9 40-007 Katowice Poland
| | - Beata Marcol
- Faculty of Mathematics, Physics and Chemistry; Institute of Chemistry; University of Silesia; Szkolna 9 40-007 Katowice Poland
| | - Dawid Zych
- Faculty of Mathematics, Physics and Chemistry; Institute of Chemistry; University of Silesia; Szkolna 9 40-007 Katowice Poland
| | - Aneta Kurpanik
- Faculty of Mathematics, Physics and Chemistry; Institute of Chemistry; University of Silesia; Szkolna 9 40-007 Katowice Poland
| | - Witold Danikiewicz
- Institute of Organic Chemistry, Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warszawa Poland
| | - Marek Matussek
- Faculty of Mathematics, Physics and Chemistry; Institute of Chemistry; University of Silesia; Szkolna 9 40-007 Katowice Poland
| | - Nikodem Kuźnik
- Faculty of Chemistry; Silesia University of Technology; Krzywoustego 4 44-100 Gliwice Poland
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12
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Dong Y, Matson JB, Edgar KJ. Olefin Cross-Metathesis in Polymer and Polysaccharide Chemistry: A Review. Biomacromolecules 2017; 18:1661-1676. [PMID: 28467697 DOI: 10.1021/acs.biomac.7b00364] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Olefin cross-metathesis, a ruthenium-catalyzed carbon-carbon double bond transformation that features high selectivity, reactivity, and tolerance of various functional groups, has been extensively applied in organic synthesis and polymer chemistry. Herein, we review strategies for performing selective cross-metathesis and its applications in polymer and polysaccharide chemistry, including constructing complex polymer architectures, attaching pendant groups to polymer backbones and surfaces, and modifying polysaccharide derivatives.
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Affiliation(s)
- Yifan Dong
- Department of Sustainable Biomaterials, ‡Department of Chemistry, and §Macromolecules Innovation Institute, Virginia Tech , Blacksburg, Virginia 24061, United States
| | - John B Matson
- Department of Sustainable Biomaterials, ‡Department of Chemistry, and §Macromolecules Innovation Institute, Virginia Tech , Blacksburg, Virginia 24061, United States
| | - Kevin J Edgar
- Department of Sustainable Biomaterials, ‡Department of Chemistry, and §Macromolecules Innovation Institute, Virginia Tech , Blacksburg, Virginia 24061, United States
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13
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Fuwa H, Sasaki M. Exploiting Ruthenium Carbene-Catalyzed Reactions in Total Synthesis of Marine Oxacyclic Natural Products. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2016. [DOI: 10.1246/bcsj.20160224] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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14
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Zieliński GK, Grela K. Tandem Catalysis Utilizing Olefin Metathesis Reactions. Chemistry 2016; 22:9440-54. [DOI: 10.1002/chem.201505136] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Indexed: 11/12/2022]
Affiliation(s)
- Grzegorz K. Zieliński
- Institute of Organic Chemistry Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
| | - Karol Grela
- Institute of Organic Chemistry Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
- Biological and Chemical Research Centre, Faculty of Chemistry; University of Warsaw; Żwirki i Wigury 101 02-089 Warsaw Poland
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15
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Inamdar SM, Chakrabarty I, Patil NT. A unified approach to pyrrole-embedded aza-heterocyclic scaffolds based on the RCM/isomerization/cyclization cascade catalyzed by a Ru/B-H binary catalyst system. RSC Adv 2016. [DOI: 10.1039/c6ra05646f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
An easy and straightforward preparation of pyrrole-embedded aza-heterocyclic scaffolds employing a Ru/B-H binary catalyst system has been developed.
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Affiliation(s)
- Suleman M. Inamdar
- Organic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune-411 008
- India
| | | | - Nitin T. Patil
- Organic Chemistry Division
- CSIR-National Chemical Laboratory
- Pune-411 008
- India
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16
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Komnatnyy VV, Taveras KM, Nandurkar NS, Le Quement ST, Givskov M, Nielsen TE. Synthesis of Substituted γ- and δ-Lactams through Mannich-Type Reactions of Solid-SupportedN-Acyliminium Ions. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500054] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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17
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Ishikura M, Abe T, Choshi T, Hibino S. Simple indole alkaloids and those with a nonrearranged monoterpenoid unit. Nat Prod Rep 2015; 32:1389-471. [DOI: 10.1039/c5np00032g] [Citation(s) in RCA: 160] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This review summarizes the isolation, structure determination, total syntheses and biological activities of simple indole alkaloids and those with a nonrearranged monoterpenoid unit, with literature coverage from 2012 to 2013.
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Affiliation(s)
- Minoru Ishikura
- School of Pharmaceutical Sciences
- Health Sciences University of Hokkaido
- Ishikari-Tobetsu
- Japan
| | - Takumi Abe
- School of Pharmaceutical Sciences
- Health Sciences University of Hokkaido
- Ishikari-Tobetsu
- Japan
| | - Tominari Choshi
- Graduate School of Pharmacy & Pharmaceutical Sciences
- Faculty of Pharmacy & Pharmaceutical Sciences
- Fukuyama University
- Fukuyama
- Japan
| | - Satoshi Hibino
- Graduate School of Pharmacy & Pharmaceutical Sciences
- Faculty of Pharmacy & Pharmaceutical Sciences
- Fukuyama University
- Fukuyama
- Japan
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18
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Pelkey ET, Pelkey SJ, Greger JG. De Novo Synthesis of 3-Pyrrolin-2-Ones. ADVANCES IN HETEROCYCLIC CHEMISTRY 2015. [DOI: 10.1016/bs.aihch.2015.04.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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19
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Thiedemann B, Schmitz CML, Staubitz A. Reduction of N-Allylamides by LiAlH4: Unexpected Attack of the Double Bond with Mechanistic Studies of Product and Byproduct Formation. J Org Chem 2014; 79:10284-95. [DOI: 10.1021/jo501907v] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Birk Thiedemann
- Otto-Diels-Institute
for
Organic Chemistry, University of Kiel, Otto-Hahn-Platz 4, 24098 Kiel, Germany
| | - Christin M. L. Schmitz
- Otto-Diels-Institute
for
Organic Chemistry, University of Kiel, Otto-Hahn-Platz 4, 24098 Kiel, Germany
| | - Anne Staubitz
- Otto-Diels-Institute
for
Organic Chemistry, University of Kiel, Otto-Hahn-Platz 4, 24098 Kiel, Germany
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20
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Ishoey M, Nielsen TE. Synthesis of Heterocycles through Transition Metal-Catalyzed Isomerization Reactions. Chemistry 2014; 20:8832-40. [DOI: 10.1002/chem.201400216] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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21
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Three-component synthesis of disubstituted 2H-pyrrol-2-ones: preparation of the violacein scaffold. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.02.111] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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22
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Shi YC, Wang SG, Yin Q, You SL. N-alkylation of indole via ring-closing metathesis/isomerization/Mannich cascade under ruthenium/chiral phosphoric acid sequential catalysis. Org Chem Front 2014. [DOI: 10.1039/c3qo00008g] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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23
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Hansen CL, Clausen JW, Ohm RG, Ascic E, Le Quement ST, Tanner D, Nielsen TE. Ruthenium Hydride/Brønsted Acid-Catalyzed Tandem Isomerization/N-Acyliminium Cyclization Sequence for the Synthesis of Tetrahydro-β-carbolines. J Org Chem 2013; 78:12545-65. [DOI: 10.1021/jo402192s] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Casper L. Hansen
- Department
of Chemistry, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Janie W. Clausen
- Department
of Chemistry, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Ragnhild G. Ohm
- Department
of Chemistry, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Erhad Ascic
- Department
of Chemistry, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | | | - David Tanner
- Department
of Chemistry, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Thomas E. Nielsen
- Department
of Chemistry, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
- Singapore
Centre on Environmental Life Sciences Engineering, Nanyang Technological University, Singapore 637551, Singapore
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24
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Jäkel M, Qu J, Schnitzer T, Helmchen G. Addition of Organometallic Reagents to ChiralN‐Methoxylactams: Enantioselective Syntheses of Pyrrolidines and Piperidines. Chemistry 2013; 19:16746-55. [DOI: 10.1002/chem.201302735] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2013] [Indexed: 11/12/2022]
Affiliation(s)
- Mascha Jäkel
- Organisch‐Chemisches Institut, Ruprecht‐Karls‐Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221‐544205
| | - Jianping Qu
- Organisch‐Chemisches Institut, Ruprecht‐Karls‐Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221‐544205
| | - Tobias Schnitzer
- Organisch‐Chemisches Institut, Ruprecht‐Karls‐Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221‐544205
| | - Günter Helmchen
- Organisch‐Chemisches Institut, Ruprecht‐Karls‐Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg (Germany), Fax: (+49) 6221‐544205
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