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Liu JR, Jiang EY, Sukhbaatar O, Zhang WH, Zhang MZ, Yang GF, Gu YC. Natural and synthetic 5-(3'-indolyl)oxazoles: Biological activity, chemical synthesis and advanced molecules. Med Res Rev 2024. [PMID: 39152525 DOI: 10.1002/med.22078] [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: 04/03/2024] [Revised: 08/02/2024] [Accepted: 08/04/2024] [Indexed: 08/19/2024]
Abstract
5-(3'-Indolyl)oxazole moiety is a privileged heterocyclic scaffold, embedded in many biologically interesting natural products and potential therapeutic agents. Compounds containing this scaffold, whether from natural sources or synthesized, have demonstrated a wide array of biological activities. This has piqued the interest of synthetic chemists, leading to a large number of reported synthetic approaches to 5-(3'-indolyl)oxazole scaffold in recent years. In this review, we comprehensively overviewed the different biological activities and chemical synthetic methods for the 5-(3'-indolyl)oxazole scaffold reported in the literatures from 1963 to 2024. The focus of this study is to highlight the significance of 5-(3'-indolyl)oxazole derivatives as the lead compounds for the lead discovery of anticancer, pesticidal, antimicrobial, antiviral, antioxidant and anti-inflammatory agents, to summarize the synthetic methods for the 5-(3'-indolyl)oxazole scaffold. In addition, the reported mechanism of action of 5-(3'-indolyl)oxazoles and advanced molecules studied in animal models are also reviewed. Furthermore, this review offers perspectives on how 5-(3'-indolyl)oxazole scaffold as a privileged structure might be exploited in the future.
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Affiliation(s)
- Jing-Rui Liu
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing, China
| | - En-Yu Jiang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing, China
| | - Otgonpurev Sukhbaatar
- Department of Chemistry, School of Applied Sciences, Mongolian University of Life Sciences, Ulaanbaatar, Mongolia
| | - Wei-Hua Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing, China
| | - Ming-Zhi Zhang
- Jiangsu Key Laboratory of Pesticide Science, College of Sciences, Nanjing Agricultural University, Nanjing, China
| | - Guang-Fu Yang
- National Key Laboratory of Green Pesticide, International Joint Research Center for Intelligent Biosensor Technology and Health, Central China Normal University, Wuhan, China
| | - Yu-Cheng Gu
- Jealott's Hill International Research Centre, Syngenta, Bracknell, Berkshire, UK
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Rodriguez Jimenez A, Breine A, Whiteway C, Dechamps E, George IF, Van der Henst C. Bactericidal effect of bacteria isolated from the marine sponges Hymeniacidon perlevis and Halichondria panicea against carbapenem-resistant Acinetobacter baumannii. Lett Appl Microbiol 2024; 77:ovae035. [PMID: 38684470 DOI: 10.1093/lambio/ovae035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2024] [Revised: 03/19/2024] [Accepted: 04/28/2024] [Indexed: 05/02/2024]
Abstract
In this study, we evaluated the antimicrobial activity of bacteria isolated from the marine sponges Hymeniacidon perlevis and Halichondria panicea against seven Acinetobacter baumannii strains, the majority of which were clinically relevant carbapenem-resistant A. baumannii strains. We observed the inhibitory activity of 18 (out of 114) sponge-isolated bacterial strains against all A. baumanii strains using medium-throughput solid agar overlay assays. These inhibitory strains belonged to the genera Lactococcus, Pseudomonas, and Vagococcus. In addition, this antimicrobial activity was validated through a liquid co-cultivation challenge using an inhibitory strain of each genus and a green fluorescent protein-tagged A. baumanii strain. Fluorescence measurements indicated that the growth of A. baumanii was inhibited by the sponge isolates. In addition, the inability of A. baumanii to grow after spreading the co-cultures on solid medium allowed us to characterize the activity of the sponge isolates as bactericidal. In conclusion, this study demonstrates that marine sponges are a reservoir of bacteria that deserves to be tapped for antibiotic discovery against A. baumanii.
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Affiliation(s)
- Ana Rodriguez Jimenez
- Ecology of Aquatic Systems, Université libre de Bruxelles (ULB), 1050 Brussels, Belgium
- Evolutionary Biology and Ecology, Université libre de Bruxelles (ULB), 1050 Brussels, Belgium
| | - Anke Breine
- Microbial Resistance and Drug Discovery, VIB-VUB Center for Structural Biology, VIB, Flanders Institute for Biotechnology, 1050 Brussels, Belgium
- Structural Biology Brussels, Vrije Universiteit Brussel (VUB), 1050 Brussels, Belgium
| | - Clemence Whiteway
- Microbial Resistance and Drug Discovery, VIB-VUB Center for Structural Biology, VIB, Flanders Institute for Biotechnology, 1050 Brussels, Belgium
- Structural Biology Brussels, Vrije Universiteit Brussel (VUB), 1050 Brussels, Belgium
| | - Etienne Dechamps
- Ecology of Aquatic Systems, Université libre de Bruxelles (ULB), 1050 Brussels, Belgium
| | - Isabelle F George
- Ecology of Aquatic Systems, Université libre de Bruxelles (ULB), 1050 Brussels, Belgium
- Marine Biology, Université libre de Bruxelles (ULB), 1050 Brussels, Belgium
| | - Charles Van der Henst
- Microbial Resistance and Drug Discovery, VIB-VUB Center for Structural Biology, VIB, Flanders Institute for Biotechnology, 1050 Brussels, Belgium
- Structural Biology Brussels, Vrije Universiteit Brussel (VUB), 1050 Brussels, Belgium
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3
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Savelson E, Tepe JJ. One-Pot Friedel-Crafts/Robinson-Gabriel Synthesis of the Indole-Oxazole Scaffold and Its Application to the Synthesis of Breitfussins C, G, and H. J Org Chem 2023; 88:755-761. [PMID: 35235750 DOI: 10.1021/acs.joc.2c00033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The indole-oxazole scaffold is found in a range of biologically active natural products, including the breitfussin family. Divergent methods that provide access to the indole-oxazole template are relatively scarce, which impedes the wider exploration of these natural products and their exciting biological activity. Herein, we describe a highly divergent synthesis of the indole-oxazole scaffold via a one-pot Friedel-Crafts/Robinson-Gabriel synthesis and the application of this methodology to the synthesis of breitfussins C, G, and H.
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Affiliation(s)
- Evan Savelson
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48823, United States
| | - Jetze J Tepe
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48823, United States
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Oluwabusola ET, Adebisi OO, Reyes F, Acquah KS, De La Cruz M, Mweetwa LL, Rajakulendran JE, Warner DF, Hai D, Ebel R, Jaspars M. Isolation and characterization of new phenolic siderophores with antimicrobial properties from Pseudomonas sp. UIAU-6B. Beilstein J Org Chem 2021; 17:2390-2398. [PMID: 34621401 PMCID: PMC8450953 DOI: 10.3762/bjoc.17.156] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Accepted: 08/30/2021] [Indexed: 01/21/2023] Open
Abstract
Five new phenolic siderophores 1–5 were isolated from the organic extract of a culture broth in a modified SGG medium of Pseudomonas sp. UIAU-6B, obtained from sediments collected from the Oyun river in North Central Nigeria. The structure of the new compounds, pseudomonin A–C (1–3) and pseudomobactin A and B (4 and 5) isolated alongside two known compounds, pseudomonine (6) and salicylic acid (7), were elucidated based on high-resolution mass spectrometry, 1D and 2D NMR analyses. The absolute configuration of the threonine residue in compounds 1–5 was determined by Marfey analysis. The antimicrobial evaluation of compound 4 exhibited the most potent activity against vancomycin-sensitive Enterococcus faecium VS144754, followed by 3 and 5, with MIC values ranging from 8 to 32 µg/mL. Compounds 2 and 3 exhibited moderate activity against Mycobacterium tuberculosis H37Rv, with MIC values of 7.8 and 15.6 µg/mL, respectively. Plausible biosynthetic hypotheses toward the new compounds 1–5 were proposed.
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Affiliation(s)
| | - Olusoji O Adebisi
- Department of Microbiology, Faculty of Life Sciences, University of Ilorin, Kwara State, Ilorin, Nigeria
| | - Fernando Reyes
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Avenida del Conocimiento 34, Parque Tecnoloógico de Ciencias de la Salud, E-18016 Granada, Spain
| | - Kojo S Acquah
- Wellcome Centre for Infectious Diseases Research in Africa, University of Cape Town, Rondebosch, 7701, South Africa
| | - Mercedes De La Cruz
- Fundación MEDINA, Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Avenida del Conocimiento 34, Parque Tecnoloógico de Ciencias de la Salud, E-18016 Granada, Spain
| | - Larry L Mweetwa
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Scotland, UK
| | - Joy E Rajakulendran
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Scotland, UK
| | - Digby F Warner
- Wellcome Centre for Infectious Diseases Research in Africa, University of Cape Town, Rondebosch, 7701, South Africa
| | - Deng Hai
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Scotland, UK
| | - Rainer Ebel
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Scotland, UK
| | - Marcel Jaspars
- Marine Biodiscovery Centre, Department of Chemistry, University of Aberdeen, Scotland, UK
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Szabó T, Dancsó A, Ábrányi-Balogh P, Volk B, Milen M. First reported propylphosphonic anhydride (T3P®) mediated Robinson–Gabriel cyclization. Synthesis of natural and unnatural 5-(3-indolyl)oxazoles. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.04.024] [Citation(s) in RCA: 2] [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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Nasfi Z, Busch H, Kehraus S, Linares-Otoya L, König GM, Schäberle TF, Bachoual R. Soil Bacteria Isolated From Tunisian Arid Areas Show Promising Antimicrobial Activities Against Gram-Negatives. Front Microbiol 2018; 9:2742. [PMID: 30483240 PMCID: PMC6242944 DOI: 10.3389/fmicb.2018.02742] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Accepted: 10/26/2018] [Indexed: 12/20/2022] Open
Abstract
Arid regions show relatively fewer species in comparison to better-watered biomes, but the competition for the few nutrients is very distinct. Here, in total 373 bacterial strains were isolated from rhizospheric soils obtained from three different sampling sites in Tunisia. Their potential for the production of antimicrobial compounds was evaluated. Bacterial strains, showing antibacterial activity against pathogenic bacteria, were isolated from all three sites, one strain from the Bou-Hedma national park, 15 strains from Chott-Djerid, and 13 strains from Matmata, respectively. The dominant genus was Bacillus, with 27 out of 29 strains. Most interestingly, 93% of the isolates showed activity against Gram-positive and Gram-negative test bacteria. Strain Bacillus sp. M21, harboring high inhibitory potential, even against clinical isolates of Gram-negative bacteria, was analyzed in detail to enable purification and identification of the bioactive compound responsible for its bioactivity. Subsequent HPLC-MS and NMR analyses resulted in the identification of 1-acetyl-β-carboline as active component. Furthermore, fungicides of the bacillomycin and fengycin group, which in addition show antibiotic effects, were identified. This work highlights the high potential of the arid-adapted strains for the biosynthesis of specialized metabolites and suggest further investigation of extreme environments, since they constitute a promising bioresource of biologically active compounds.
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Affiliation(s)
- Zina Nasfi
- Laboratory of Plant Improvement and Valorization of Agroresources, National School of Engineering of Sfax, Sfax, Tunisia
- Institute for Insect Biotechnology, Justus-Liebig-University Giessen, Giessen, Germany
- Faculty of Sciences of Gabès, University of Gabès, Gabès, Tunisia
| | - Henrik Busch
- Institute for Pharmaceutical Biology, University of Bonn, Bonn, Germany
| | - Stefan Kehraus
- Institute for Pharmaceutical Biology, University of Bonn, Bonn, Germany
| | - Luis Linares-Otoya
- Institute for Insect Biotechnology, Justus-Liebig-University Giessen, Giessen, Germany
| | - Gabriele M. König
- Institute for Pharmaceutical Biology, University of Bonn, Bonn, Germany
| | - Till F. Schäberle
- Institute for Insect Biotechnology, Justus-Liebig-University Giessen, Giessen, Germany
- Department of Bioresources of the Fraunhofer Institute for Molecular Biology and Applied Ecology, Giessen, Germany
| | - Rafik Bachoual
- Laboratory of Plant Improvement and Valorization of Agroresources, National School of Engineering of Sfax, Sfax, Tunisia
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