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Morales-Herrera S, Jourquin J, Coppé F, Lopez-Galvis L, De Smet T, Safi A, Njo M, Griffiths CA, Sidda JD, Mccullagh JSO, Xue X, Davis BG, Van der Eycken J, Paul MJ, Van Dijck P, Beeckman T. Trehalose-6-phosphate signaling regulates lateral root formation in Arabidopsis thaliana. Proc Natl Acad Sci U S A 2023; 120:e2302996120. [PMID: 37748053 PMCID: PMC10556606 DOI: 10.1073/pnas.2302996120] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 08/08/2023] [Indexed: 09/27/2023] Open
Abstract
Plant roots explore the soil for water and nutrients, thereby determining plant fitness and agricultural yield, as well as determining ground substructure, water levels, and global carbon sequestration. The colonization of the soil requires investment of carbon and energy, but how sugar and energy signaling are integrated with root branching is unknown. Here, we show through combined genetic and chemical modulation of signaling pathways that the sugar small-molecule signal, trehalose-6-phosphate (T6P) regulates root branching through master kinases SNF1-related kinase-1 (SnRK1) and Target of Rapamycin (TOR) and with the involvement of the plant hormone auxin. Increase of T6P levels both via genetic targeting in lateral root (LR) founder cells and through light-activated release of the presignaling T6P-precursor reveals that T6P increases root branching through coordinated inhibition of SnRK1 and activation of TOR. Auxin, the master regulator of LR formation, impacts this T6P function by transcriptionally down-regulating the T6P-degrader trehalose phosphate phosphatase B in LR cells. Our results reveal a regulatory energy-balance network for LR formation that links the 'sugar signal' T6P to both SnRK1 and TOR downstream of auxin.
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Affiliation(s)
- Stefania Morales-Herrera
- Department of Plant Biotechnology and Bioinformatics Ghent University, GhentB-9052, Belgium
- Vlaams Instituut voor Biotechnologie Center for Plant Systems Biology, GhentB-9052, Belgium
- Laboratory of Molecular Cell Biology, Katholieke Universiteit Leuven, LeuvenB3001, Belgium
- Vlaams Instituut voor Biotechnologie-Katholieke Universiteit Leuven Center for Microbiology, LeuvenB3001, Belgium
| | - Joris Jourquin
- Department of Plant Biotechnology and Bioinformatics Ghent University, GhentB-9052, Belgium
- Vlaams Instituut voor Biotechnologie Center for Plant Systems Biology, GhentB-9052, Belgium
| | - Frederic Coppé
- Department of Plant Biotechnology and Bioinformatics Ghent University, GhentB-9052, Belgium
- Vlaams Instituut voor Biotechnologie Center for Plant Systems Biology, GhentB-9052, Belgium
| | - Lorena Lopez-Galvis
- Department of Plant Biotechnology and Bioinformatics Ghent University, GhentB-9052, Belgium
- Vlaams Instituut voor Biotechnologie Center for Plant Systems Biology, GhentB-9052, Belgium
- Laboratory of Molecular Cell Biology, Katholieke Universiteit Leuven, LeuvenB3001, Belgium
- Vlaams Instituut voor Biotechnologie-Katholieke Universiteit Leuven Center for Microbiology, LeuvenB3001, Belgium
| | - Tom De Smet
- Department of Organic and Macromolecular Chemistry, Laboratory for Organic and Bio-Organic Synthesis, Ghent University, GhentB-9000, Belgium
| | - Alaeddine Safi
- Department of Plant Biotechnology and Bioinformatics Ghent University, GhentB-9052, Belgium
- Vlaams Instituut voor Biotechnologie Center for Plant Systems Biology, GhentB-9052, Belgium
| | - Maria Njo
- Department of Plant Biotechnology and Bioinformatics Ghent University, GhentB-9052, Belgium
- Vlaams Instituut voor Biotechnologie Center for Plant Systems Biology, GhentB-9052, Belgium
| | - Cara A. Griffiths
- Department of Sustainable Soils and Crops, Rothamsted Research, HarpendenAL5 2JQ, United Kingdom
| | - John D. Sidda
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, OxfordOX1 3TA, United Kingdom
| | - James S. O. Mccullagh
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, OxfordOX1 3TA, United Kingdom
| | - Xiaochao Xue
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, OxfordOX1 3TA, United Kingdom
| | - Benjamin G. Davis
- Department of Chemistry, Chemistry Research Laboratory, University of Oxford, OxfordOX1 3TA, United Kingdom
- Next Generation Chemistry, The Rosalind Franklin Institute, DidcotOX1 3TA, United Kingdom
- Department of Pharmacology, University of Oxford, OxfordOX1 3TA, United Kingdom
| | - Johan Van der Eycken
- Department of Organic and Macromolecular Chemistry, Laboratory for Organic and Bio-Organic Synthesis, Ghent University, GhentB-9000, Belgium
| | - Matthew J. Paul
- Department of Sustainable Soils and Crops, Rothamsted Research, HarpendenAL5 2JQ, United Kingdom
| | - Patrick Van Dijck
- Laboratory of Molecular Cell Biology, Katholieke Universiteit Leuven, LeuvenB3001, Belgium
- Vlaams Instituut voor Biotechnologie-Katholieke Universiteit Leuven Center for Microbiology, LeuvenB3001, Belgium
- Katholieke Universiteit Leuven Plant Institute, Katholieke Universiteit Leuven, LeuvenB3001, Belgium
| | - Tom Beeckman
- Department of Plant Biotechnology and Bioinformatics Ghent University, GhentB-9052, Belgium
- Vlaams Instituut voor Biotechnologie Center for Plant Systems Biology, GhentB-9052, Belgium
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2
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Liu C, Van der Eycken J, Van der Eycken EV. Transition Metal-Free N-S Bond Cleavage and C-N Bond Activation of Ugi-Adducts for Rapid Preparation of Primary Amides and α-Ketoamides. Chemistry 2023; 29:e202301541. [PMID: 37410246 DOI: 10.1002/chem.202301541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 07/05/2023] [Accepted: 07/06/2023] [Indexed: 07/07/2023]
Abstract
A novel method of transition metal-free N-S bond cleavage and subsequent C-N bond activation of Ugi-adducts was developed. Diverse primary amides and α-ketoamides were prepared in a rapid, step-economical and highly efficient manner in two steps. This strategy features excellent chemoselectivity, high yield and functional-group tolerance. Primary amides derived from the pharmaceuticals probenecid and febuxostat were prepared. This method opens a new pathway for the simultaneous synthesis of primary amides and α-ketoamides in an environmentally friendly manner.
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Affiliation(s)
- Chao Liu
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Johan Van der Eycken
- Laboratory for Organic and Bio-Organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 (S.4), Ghent, 9000, Belgium
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, 3001, Leuven, Belgium
- Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya street 6, Moskva, RU-117198, Moscow, Russia
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3
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Vázquez-Amaya LY, Dootselaere B, Ojeda-Carralero GM, Pillitteri S, Van der Eycken J, Van der Eycken EV, Sharma UK. Light-Driven Four-Component Reaction with Boronic Acid Derivatives as Alkylating Agents: An Amine/Imine-Mediated Activation Approach. Org Lett 2023. [PMID: 37249484 DOI: 10.1021/acs.orglett.3c01020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Herein, we describe a one-pot aminoalkylation of styrene derivatives with boronic acids (BAs) and boronic acid pinacol esters as radical precursors for the synthesis of complex secondary amines in moderate to high yields through a mild and easily accessible organophotoredox-catalytic four-component reaction. Additionally, we report for the first time in a photoredox process the activation of alkyl boronic acid derivatives by imines, which play a dual role in the reaction as both substrate and Lewis base activator. The protocol applicability was greatly enhanced by its successful adaptation to photoflow reactors.
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Affiliation(s)
- Laura Y Vázquez-Amaya
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Brecht Dootselaere
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Gerardo M Ojeda-Carralero
- Department of General and Inorganic Chemistry, Faculty of Chemistry, University of Havana, Zapata y G, Havana 10400, Cuba
| | - Serena Pillitteri
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Johan Van der Eycken
- Laboratory for Organic and Bio-Organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 (S.4), B-9000 Ghent, Belgium
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
- People's Friendship University of Russia (RUDN University), Miklukho-Maklaya street 6, RU-117198 Moscow, Russia
| | - Upendra K Sharma
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
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4
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Estévez-Gallego J, Álvarez-Bernad B, Pera B, Wullschleger C, Raes O, Menche D, Martínez JC, Lucena-Agell D, Prota AE, Bonato F, Bargsten K, Cornelus J, Giménez-Abián JF, Northcote P, Steinmetz MO, Kamimura S, Altmann KH, Paterson I, Gago F, Van der Eycken J, Díaz JF, Oliva MÁ. Chemical modulation of microtubule structure through the laulimalide/peloruside site. Structure 2023; 31:88-99.e5. [PMID: 36462501 DOI: 10.1016/j.str.2022.11.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 08/23/2022] [Accepted: 11/08/2022] [Indexed: 12/05/2022]
Abstract
Taxanes are microtubule-stabilizing agents used in the treatment of many solid tumors, but they often involve side effects affecting the peripheral nervous system. It has been proposed that this could be related to structural modifications on the filament upon drug binding. Alternatively, laulimalide and peloruside bind to a different site also inducing stabilization, but they have not been exploited in clinics. Here, we use a combination of the parental natural compounds and derived analogs to unravel the stabilization mechanism through this site. These drugs settle lateral interactions without engaging the M loop, which is part of the key and lock involved in the inter-protofilament contacts. Importantly, these drugs can modulate the angle between protofilaments, producing microtubules of different diameters. Among the compounds studied, we have found some showing low cytotoxicity and able to induce stabilization without compromising microtubule native structure. This opens the window of new applications for microtubule-stabilizing agents beyond cancer treatment.
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Affiliation(s)
- Juan Estévez-Gallego
- Centro de Investigaciones Biológicas Margarita Salas - Consejo Superior de Investigaciones Científicas, Madrid 28040, Spain
| | - Beatriz Álvarez-Bernad
- Centro de Investigaciones Biológicas Margarita Salas - Consejo Superior de Investigaciones Científicas, Madrid 28040, Spain
| | - Benet Pera
- Centro de Investigaciones Biológicas Margarita Salas - Consejo Superior de Investigaciones Científicas, Madrid 28040, Spain
| | - Christoph Wullschleger
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences - ETH Zurich, Zürich 8093, Switzerland
| | - Olivier Raes
- Department of Organic and Macromolecular Chemistry, Ghent University, Gent 9000, Belgium
| | - Dirk Menche
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, UK
| | | | - Daniel Lucena-Agell
- Centro de Investigaciones Biológicas Margarita Salas - Consejo Superior de Investigaciones Científicas, Madrid 28040, Spain
| | - Andrea E Prota
- Laboratory of Biomolecular Research, Division of Biology and Chemistry, Paul Scherrer Institut, Villigen 5232, Switzerland
| | - Francesca Bonato
- Centro de Investigaciones Biológicas Margarita Salas - Consejo Superior de Investigaciones Científicas, Madrid 28040, Spain
| | - Katja Bargsten
- Laboratory of Biomolecular Research, Division of Biology and Chemistry, Paul Scherrer Institut, Villigen 5232, Switzerland
| | - Jelle Cornelus
- Department of Organic and Macromolecular Chemistry, Ghent University, Gent 9000, Belgium
| | - Juan Francisco Giménez-Abián
- Centro de Investigaciones Biológicas Margarita Salas - Consejo Superior de Investigaciones Científicas, Madrid 28040, Spain
| | - Peter Northcote
- Ferrier Research Institute, University of Wellington, Lower Hutt 5010, New Zealand
| | - Michel O Steinmetz
- Laboratory of Biomolecular Research, Division of Biology and Chemistry, Paul Scherrer Institut, Villigen 5232, Switzerland; University of Basel, Biozentrum, Basel 4056, Switzerland
| | - Shinji Kamimura
- Department of Biological Sciences, Faculty of Science and Engineering, Chuo University, Tokyo 192-0393, Japan
| | - Karl-Heinz Altmann
- Department of Chemistry and Applied Biosciences, Institute of Pharmaceutical Sciences - ETH Zurich, Zürich 8093, Switzerland
| | - Ian Paterson
- Yusuf Hamied Department of Chemistry, University of Cambridge, Cambridge CB2 1EW, UK
| | - Federico Gago
- Department of Biomedical Sciences and Associated Unit IQM-UAH, Universidad de Alcalá, Alcalá de Henares 28805, Spain
| | - Johan Van der Eycken
- Department of Organic and Macromolecular Chemistry, Ghent University, Gent 9000, Belgium
| | - J Fernando Díaz
- Centro de Investigaciones Biológicas Margarita Salas - Consejo Superior de Investigaciones Científicas, Madrid 28040, Spain
| | - María Ángela Oliva
- Centro de Investigaciones Biológicas Margarita Salas - Consejo Superior de Investigaciones Científicas, Madrid 28040, Spain.
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5
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Hammoud MM, Khattab M, Abdel-Motaal M, Van der Eycken J, Alnajjar R, Abulkhair HS, Al-Karmalawy AA. Synthesis, structural characterization, DFT calculations, molecular docking, and molecular dynamics simulations of a novel ferrocene derivative to unravel its potential antitumor activity. J Biomol Struct Dyn 2022:1-18. [PMID: 35674744 DOI: 10.1080/07391102.2022.2082533] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In this article, we describe a set of subsequent five-steps chemical reactions to synthesize a ferrocene derivative named 1-(5-(diphenylphosphaneyl)cyclopenta-1,3-dien-1-yl)ethyl)imino)-1,3-dihydroisobenzofuran-5-yl)methanol (compound 10). Structural characterization of 10 and its intermediate products was also performed and reported to attest to their formation. A molecular docking study was performed to propose the novel synthesized ferrocene derivative (10) as a potential antitumor candidate targeting the mitogen-activated protein (MAP) kinases interacting kinase (Mnk) 1. The computed docking score of (10) at -9.50 kcal/mol compared to the native anticancer staurosporine at -8.72 kcal/mol postulated a promising anticancer activity. Also, molecular dynamics (MD) simulations were carried out for 500 ns followed by MM-GBSA-binding free energy calculations for both the docked complexes of ferrocene and staurosporine to give more deep insights into their dynamic behavior in physiological conditions. Furthermore, DFT calculations were performed to unravel some of the physiochemical characteristics of the ferrocene derivative (10). The quantum mechanics calculations shed the light on some of the structural and electrochemical configurations of (10) which would open the horizon for further investigation. HighlightsThe synthesis of a ferrocene derivative named 1-(5-(diphenylphosphaneyl)cyclopenta-1,3-dien-1-yl)ethyl)imino)-1,3-dihydroisobenzofuran-5-yl)methanol (compound 10) was described.Structural characterizations of ferrocene derivative (10) and its intermediate products were also performed.DFT calculations, molecular docking, molecular dynamics, and MM-GBSA calculations were carried out.Computational studies revealed the antitumor potential of ferrocene derivative (10) through targeting and inhibiting mitogen-activated protein (MAP) kinases interacting kinase (Mnk) 1.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Mohamed M Hammoud
- Department of Chemistry, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, Al-Kharj, Saudi Arabia.,Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt
| | - Muhammad Khattab
- Department of Chemistry of Natural and Microbial Products, Pharmaceutical and Drug Industries Research Institute National Research Centre, Dokki, Cairo, Egypt
| | - Marwa Abdel-Motaal
- Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt.,Department of Chemistry, College of Science, Qassim University, Buraydah, Saudi Arabia
| | - Johan Van der Eycken
- Laboratory for Organic and Bioorganic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University, Ghent, Belgium
| | - Radwan Alnajjar
- Department of Chemistry, Faculty of Science, University of Benghazi, Benghazi, Libya.,Department of Chemistry, University of Cape Town, Rondebosch, South Africa
| | - Hamada S Abulkhair
- Pharmaceutical Organic Chemistry Department, Faculty of Pharmacy (Boys), Al-Azhar University, Nasr City, Cairo, Egypt.,Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Horus University-Egypt, New Damietta, Egypt
| | - Ahmed Ali Al-Karmalawy
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Horus University-Egypt, New Damietta, Egypt
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6
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Song L, Liu C, Tian G, Van Meervelt L, Van der Eycken J, Van der Eycken EV. Late-stage diversification of peptidomimetics and oligopeptides via gold-catalyzed post-Ugi cyclization. Molecular Catalysis 2022. [DOI: 10.1016/j.mcat.2022.112240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Dhaene S, Van Laar A, De Doncker M, De Beul E, Beerens K, Grootaert C, Caroen J, Van der Eycken J, Van Camp J, Desmet T. Sweet Biotechnology: Enzymatic Production and Digestibility Screening of Novel Kojibiose and Nigerose Analogues. J Agric Food Chem 2022; 70:3502-3511. [PMID: 35266393 DOI: 10.1021/acs.jafc.1c07709] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In view of the global pandemic of obesity and related metabolic diseases, there is an increased interest in alternative carbohydrates with promising physiochemical and health-related properties as a potential replacement for traditional sugars. However, our current knowledge is limited to only a small selection of carbohydrates, whereas the majority of alternative rare carbohydrates and especially their properties remain to be investigated. Unraveling their potential properties, like digestibility and glycemic content, could unlock their use in industrial applications. Here, we describe the enzymatic production and in vitro digestibility of three novel glycosides, namely, two kojibiose analogues (i.e., d-Glcp-α-1,2-d-Gal and d-Glcp-α-1,2-d-Rib) and one nigerose analogue (i.e., d-Glcp-α-1,3-l-Ara). These novel sugars were discovered after an intensive acceptor screening with a sucrose phosphorylase originating from Bifidobacterium adolescentis (BaSP). Optimization and upscaling of this process led to roughly 100 g of these disaccharides. Digestibility, absorption, and caloric potential were assessed using brush border enzymes of rat origin and human intestinal Caco-2 cells. The rare disaccharides showed a reduced digestibility and a limited impact on energy metabolism, which was structure-dependent and even more pronounced for the three novel disaccharides in comparison to their respective glucobioses, translating to a low-caloric potential for these novel rare disaccharides.
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Affiliation(s)
- Shari Dhaene
- Department of Biotechnology, Centre for Synthetic Biology (CSB), Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Amar Van Laar
- Department of Food technology, Safety and Health, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Marc De Doncker
- Department of Biotechnology, Centre for Synthetic Biology (CSB), Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Emma De Beul
- Department of Biotechnology, Centre for Synthetic Biology (CSB), Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Koen Beerens
- Department of Biotechnology, Centre for Synthetic Biology (CSB), Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Charlotte Grootaert
- Department of Food technology, Safety and Health, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Jurgen Caroen
- Department of Organic and Macromolecular Chemistry, Laboratory for Organic and Bio-Organic Synthesis (LOBOS), Ghent University, Krijgslaan 281 S4, B-9000 Ghent, Belgium
| | - Johan Van der Eycken
- Department of Organic and Macromolecular Chemistry, Laboratory for Organic and Bio-Organic Synthesis (LOBOS), Ghent University, Krijgslaan 281 S4, B-9000 Ghent, Belgium
| | - John Van Camp
- Department of Food technology, Safety and Health, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Tom Desmet
- Department of Biotechnology, Centre for Synthetic Biology (CSB), Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
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8
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Xu X, Feng H, Zhang X, Song L, Van Meervelt L, Van der Eycken J, Harvey JN, Van der Eycken EV. Pd-Catalyzed Ring Restructuring of Oxazolidines with Alkenes Leading to Fused Polycyclic Indolizines. Org Lett 2022; 24:1232-1236. [DOI: 10.1021/acs.orglett.2c00007] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Xianjun Xu
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven B-3001, Belgium
| | - Huangdi Feng
- College of Chemistry and Chemical Engineering and Shanghai Engineering Research Center of Textile Chemistry and Cleaner Production, Shanghai University of Engineering Science, Shanghai 201620, China
| | - Xiaoyong Zhang
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven B-3001, Belgium
- Institute of Systems and Physical Biology, Shenzhen Bay Laboratory, Shenzhen 518055, China
| | - Liangliang Song
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven B-3001, Belgium
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven Celestijnenlaan 200F, Leuven B-3001, Belgium
| | - Johan Van der Eycken
- Laboratory for Organic and Bio-Organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University, KriJgslaan 281 (S.4), B-9000 Ghent, Belgium
| | - Jeremy N. Harvey
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven B-3001, Belgium
| | - Erik V. Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven B-3001, Belgium
- Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya Street 6, Moscow 117198, Russia
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9
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Hammouda MM, Metwally HM, Fekri A, Van der Eycken J. Synthesis and Molecular Modeling Studies on Novel C2 Alkylated Benzoazonine Scaffold and Corresponding 2-Pyrazoline Derivatives as Acetylcholinestrase Enzyme Inhibitors. Polycycl Aromat Compd 2021. [DOI: 10.1080/10406638.2019.1666888] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Mohamed M. Hammouda
- Faculty of Science, Chemistry Department, Mansoura University, Mansoura, Egypt
| | - Heba M. Metwally
- Faculty of Science, Chemistry Department, Mansoura University, Mansoura, Egypt
| | - Ahmed Fekri
- Faculty of Science, Chemistry Department, Mansoura University, Mansoura, Egypt
| | - Johan Van der Eycken
- Laboratory for Organic and Bioorganic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University, Gent, Belgium
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10
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Dhaene S, Van der Eycken J, Beerens K, Franceus J, Desmet T, Caroen J. Synthesis, trehalase hydrolytic resistance and inhibition properties of 4- and 6-substituted trehalose derivatives. J Enzyme Inhib Med Chem 2021; 35:1964-1989. [PMID: 33164573 PMCID: PMC7655077 DOI: 10.1080/14756366.2020.1837125] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Although trehalose has recently gained interest because of its pharmaceutical potential, its clinical use is hampered due to its low bioavailability. Hence, hydrolysis-resistant trehalose analogues retaining biological activity could be of interest. In this study, 34 4- and 6-O-substituted trehalose derivatives were synthesised using an ether- or carbamate-type linkage. Their hydrolysis susceptibility and inhibitory properties were determined against two trehalases, i.e. porcine kidney and Mycobacterium smegmatis. With the exception of three weakly hydrolysable 6-O-alkyl derivatives, the compounds generally showed to be completely resistant. Moreover, a number of derivatives was shown to be an inhibitor of one or both of these trehalases. For the strongest inhibitors of porcine kidney trehalase IC50 values of around 10 mM could be determined, whereas several compounds displayed sub-mM IC50 against M. smegmatis trehalase. Dockings studies were performed to explain the observed influence of the substitution pattern on the inhibitory activity towards porcine kidney trehalase.
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Affiliation(s)
- Shari Dhaene
- Department of Biotechnology, Centre for Synthetic Biology, Ghent University, Ghent, Belgium
| | - Johan Van der Eycken
- Department of Organic and Macromolecular Chemistry, Laboratory for Organic and Bio-Organic Synthesis (LOBOS), Ghent University, Ghent, Belgium
| | - Koen Beerens
- Department of Biotechnology, Centre for Synthetic Biology, Ghent University, Ghent, Belgium
| | - Jorick Franceus
- Department of Biotechnology, Centre for Synthetic Biology, Ghent University, Ghent, Belgium
| | - Tom Desmet
- Department of Biotechnology, Centre for Synthetic Biology, Ghent University, Ghent, Belgium
| | - Jurgen Caroen
- Department of Organic and Macromolecular Chemistry, Laboratory for Organic and Bio-Organic Synthesis (LOBOS), Ghent University, Ghent, Belgium
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11
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Song L, Ojeda‐Carralero GM, Parmar D, González‐Martínez DA, Van Meervelt L, Van der Eycken J, Goeman J, Rivera DG, Van der Eycken EV. Chemoselective Peptide Backbone Diversification and Bioorthogonal Ligation by Ruthenium‐Catalyzed C−H Activation/Annulation. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100323] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Liangliang Song
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Gerardo M. Ojeda‐Carralero
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
- Center for Natural Product Research Faculty of Chemistry University of Havana Zapata y G 10400 Havana Cuba
| | - Divyaakshar Parmar
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - David A. González‐Martínez
- Center for Natural Product Research Faculty of Chemistry University of Havana Zapata y G 10400 Havana Cuba
| | - Luc Van Meervelt
- Biomolecular Architecture Department of Chemistry KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Johan Van der Eycken
- Laboratory for Organic and Bio-Organic Synthesis Department of Organic and Macromolecular Chemistry Ghent University Krijgslaan 281 (S.4) B-9000 Ghent Belgium
| | - Jan Goeman
- Laboratory for Organic and Bio-Organic Synthesis Department of Organic and Macromolecular Chemistry Ghent University Krijgslaan 281 (S.4) B-9000 Ghent Belgium
| | - Daniel G. Rivera
- Center for Natural Product Research Faculty of Chemistry University of Havana Zapata y G 10400 Havana Cuba
| | - Erik V. Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
- Peoples' Friendship University of Russia (RUDN University) Miklukho-Maklaya Street 6 Moscow 117198 Russia
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12
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Song L, Zhang X, Tang X, Van Meervelt L, Van der Eycken J, Harvey JN, Van der Eycken EV. Ruthenium-catalyzed cascade C-H activation/annulation of N-alkoxybenzamides: reaction development and mechanistic insight. Chem Sci 2020; 11:11562-11569. [PMID: 34094402 PMCID: PMC8162874 DOI: 10.1039/d0sc04434b] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
A highly selective ruthenium-catalyzed C–H activation/annulation of alkyne-tethered N-alkoxybenzamides has been developed. In this reaction, diverse products from inverse annulation can be obtained in moderate to good yields with high functional group compatibility. Insightful experimental and theoretical studies indicate that the reaction to the inverse annulation follows the Ru(ii)–Ru(iv)–Ru(ii) pathway involving N–O bond cleavage prior to alkyne insertion. This is highly different compared to the conventional mechanism of transition metal-catalyzed C–H activation/annulation with alkynes, involving alkyne insertion prior to N–O bond cleavage. Via this pathway, the in situ generated acetic acid from the N–H/C–H activation step facilitates the N–O bond cleavage to give the Ru-nitrene species. Besides the conventional mechanism forming the products via standard annulation, an alternative and novel Ru(ii)–Ru(iv)–Ru(ii) mechanism featuring N–O cleavage preceding alkyne insertion has been proposed, affording a new understanding of transition metal-catalyzed C–H activation/annulation. A highly selective ruthenium-catalyzed C–H activation/annulation through a pathway involving N–O bond cleavage prior to alkyne insertion is developed.![]()
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Affiliation(s)
- Liangliang Song
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F Leuven 3001 Belgium
| | - Xiaoyong Zhang
- Theoretical and Computational Chemistry, Department of Chemistry, KU Leuven Celestijnenlaan 200F Leuven 3001 Belgium
| | - Xiao Tang
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology Gardens Point Campus Brisbane QLD 4001 Australia
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven Celestijnenlaan 200F Leuven 3001 Belgium
| | - Johan Van der Eycken
- Laboratory for Organic and Bio-Organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University Krijgslaan 281 (S.4) B-9000 Ghent Belgium
| | - Jeremy N Harvey
- Theoretical and Computational Chemistry, Department of Chemistry, KU Leuven Celestijnenlaan 200F Leuven 3001 Belgium
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F Leuven 3001 Belgium .,Peoples' Friendship University of Russia (RUDN University) Miklukho-Maklaya Street 6 Moscow 117198 Russia
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13
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Song L, Tian G, Van der Eycken J, Van der Eycken EV. Intramolecular cascade annulation triggered by rhodium(III)-catalyzed sequential C(sp 2)-H activation and C(sp 3)-H amination. Beilstein J Org Chem 2019; 15:571-576. [PMID: 30873242 PMCID: PMC6404421 DOI: 10.3762/bjoc.15.52] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 02/20/2019] [Indexed: 12/18/2022] Open
Abstract
A rhodium(III)-catalyzed intramolecular oxidative annulation of O-substituted N-hydroxyacrylamides for the construction of indolizinones via sequential C(sp2)–H activation and C(sp3)–H amination has been developed. This approach shows excellent functional-group tolerance. The synthesized scaffold forms the core of many natural products with pharmacological relevance.
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Affiliation(s)
- Liangliang Song
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Guilong Tian
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Johan Van der Eycken
- Laboratory for Organic and Bio-Organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 (S.4), B-9000 Ghent, Belgium
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium.,Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya Street 6, Moscow, Russia
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14
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Janssens J, Van der Eycken J, Van Calenbergh S. Ceramide-Templated Macrolactams: Total Synthesis and Biological Evaluation of Macrocyclic α-Galactosylceramide Analogues and their Aglycons. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801839] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Jonas Janssens
- Department of Pharmaceutics (FFW); Ghent University; Ottergemsesteenweg 460, B -9000 Ghent Belgium
| | - Johan Van der Eycken
- Department of Organic and Macromolecular Chemistry; Krijgslaan 281 (S4), B -9000 Ghent Belgium
| | - Serge Van Calenbergh
- Department of Pharmaceutics (FFW); Ghent University; Ottergemsesteenweg 460, B -9000 Ghent Belgium
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15
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Verhoeven J, Hulpia F, Kersemans K, Bolcaen J, De Lombaerde S, Goeman J, Descamps B, Hallaert G, Van den Broecke C, Deblaere K, Vanhove C, Van der Eycken J, Van Calenbergh S, Goethals I, De Vos F. New fluoroethyl phenylalanine analogues as potential LAT1-targeting PET tracers for glioblastoma. Sci Rep 2019; 9:2878. [PMID: 30814660 PMCID: PMC6393465 DOI: 10.1038/s41598-019-40013-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 02/07/2019] [Indexed: 02/07/2023] Open
Abstract
The use of O-(2-[18F]fluoroethyl)-L-tyrosine ([18F]FET) as a positron emission tomography (PET) tracer for brain tumor imaging might have some limitations because of the relatively low affinity for the L-type amino acid transporter 1 (LAT1). To assess the stereospecificity and evaluate the influence of aromatic ring modification of phenylalanine LAT1 targeting tracers, six different fluoroalkylated phenylalanine analogues were synthesized. After in vitro Ki determination, the most promising compound, 2-[18F]-2-fluoroethyl-L-phenylalanine (2-[18F]FELP), was selected for further evaluation and in vitro comparison with [18F]FET. Subsequently, 2-[18F]FELP was assessed in vivo and compared with [18F]FET and [18F]FDG in a F98 glioblastoma rat model. 2-[18F]FELP showed improved in vitro characteristics over [18F]FET, especially when the affinity and specificity for system L is concerned. Based on our results, 2-[18F]FELP is a promising new PET tracer for brain tumor imaging.
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Affiliation(s)
| | - Fabian Hulpia
- Laboratory for Medicinal Chemistry, Ghent University, Ghent, Belgium
| | - Ken Kersemans
- Ghent University Hospital, Department of Nuclear Medicine, Ghent, Belgium
| | - Julie Bolcaen
- Ghent University Hospital, Department of Nuclear Medicine, Ghent, Belgium
| | | | - Jan Goeman
- Laboratory for Organic and Bio-organic synthesis, Ghent University, Ghent, Belgium
| | - Benedicte Descamps
- IBiTech-MEDISIP Ghent University, Department of Electronics and Information Systems, Ghent, Belgium
| | - Giorgio Hallaert
- Ghent University Hospital, Department of Neurosurgery, Ghent, Belgium
| | | | - Karel Deblaere
- Ghent University Hospital, Department of Radiology and Medical Imaging, Ghent, Belgium
| | - Christian Vanhove
- IBiTech-MEDISIP Ghent University, Department of Electronics and Information Systems, Ghent, Belgium
| | - Johan Van der Eycken
- Laboratory for Organic and Bio-organic synthesis, Ghent University, Ghent, Belgium
| | | | - Ingeborg Goethals
- Ghent University Hospital, Department of Nuclear Medicine, Ghent, Belgium
| | - Filip De Vos
- Laboratory of Radiopharmacy, Ghent University, Ghent, Belgium
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16
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Franceus J, Dhaene S, Decadt H, Vandepitte J, Caroen J, Van der Eycken J, Beerens K, Desmet T. Rational design of an improved transglucosylase for production of the rare sugar nigerose. Chem Commun (Camb) 2019; 55:4531-4533. [PMID: 30924472 DOI: 10.1039/c9cc01587f] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The sucrose phosphorylase from Bifidobacterium adolescentis (BaSP) can be used as a transglucosylase for the production of rare sugars. We designed variants of BaSP for the efficient synthesis of nigerose from sucrose and glucose, thereby adding to the inventory of rare sugars that can conveniently be produced from bulk sugars.
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Affiliation(s)
- Jorick Franceus
- Centre for Synthetic Biology (CSB), Department of Biotechnology, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium.
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17
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Lemoine L, Van Tiggel D, Sugarbaker P, Van der Eycken J, Goeman J, Noben JP, Penders J, Van der Speeten K. A validated high performance liquid chromatography – diode array detector method for the quantification of mitomycin C in plasma, peritoneal fluid and urine. J LIQ CHROMATOGR R T 2018. [DOI: 10.1080/10826076.2018.1522593] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Lieselotte Lemoine
- Faculty of Medicine and Life Sciences, Discipline Group Physiology, Biochemistry and Immunology, Biomedical Research Institute and Transnational University Limburg, Hasselt University, Hasselt, Belgium
- Department of Surgical Oncology, Ziekenhuis Oost-Limburg, Genk, Belgium
| | - Dorien Van Tiggel
- Department of Laboratory Medicine, Ziekenhuis Oost-Limburg, Genk, Belgium
| | - Paul Sugarbaker
- Center for Gastrointestinal Malignancies, MedStar Washington Hospital Center, Washington, DC, USA
| | - Johan Van der Eycken
- Laboratory for Organic and Bio-organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University, Gent, Belgium
| | - Jan Goeman
- Laboratory for Organic and Bio-organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University, Gent, Belgium
| | - Jean-Paul Noben
- Faculty of Medicine and Life Sciences, Discipline Group Physiology, Biochemistry and Immunology, Biomedical Research Institute and Transnational University Limburg, Hasselt University, Hasselt, Belgium
| | - Joris Penders
- Faculty of Medicine and Life Sciences, Discipline Group Physiology, Biochemistry and Immunology, Biomedical Research Institute and Transnational University Limburg, Hasselt University, Hasselt, Belgium
- Department of Laboratory Medicine, Ziekenhuis Oost-Limburg, Genk, Belgium
| | - Kurt Van der Speeten
- Faculty of Medicine and Life Sciences, Discipline Group Physiology, Biochemistry and Immunology, Biomedical Research Institute and Transnational University Limburg, Hasselt University, Hasselt, Belgium
- Department of Surgical Oncology, Ziekenhuis Oost-Limburg, Genk, Belgium
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18
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Janssens J, Risseeuw MDP, Van der Eycken J, Van Calenbergh S. Regioselective Ring Opening of 1,3-Dioxane-Type Acetals in Carbohydrates. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801245] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Jonas Janssens
- Laboratory for Medicinal Chemistry; Department of Pharmaceutics (FFW); Ghent University; Ottergemsesteenweg 460 9000 Ghent Belgium
- Laboratory for Organic and Bioorganic Synthesis; Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 (S4) 9000 Ghent Belgium
| | - Martijn D. P. Risseeuw
- Laboratory for Medicinal Chemistry; Department of Pharmaceutics (FFW); Ghent University; Ottergemsesteenweg 460 9000 Ghent Belgium
| | - Johan Van der Eycken
- Laboratory for Organic and Bioorganic Synthesis; Department of Organic and Macromolecular Chemistry; Ghent University; Krijgslaan 281 (S4) 9000 Ghent Belgium
| | - Serge Van Calenbergh
- Laboratory for Medicinal Chemistry; Department of Pharmaceutics (FFW); Ghent University; Ottergemsesteenweg 460 9000 Ghent Belgium
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19
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Song L, Risseeuw MD, Froeyen M, Karalic I, Goeman J, Cappoen D, Van der Eycken J, Cos P, Munier-Lehmann H, Van Calenbergh S. Corrigenda to “Elaboration of a proprietary thymidylate kinase inhibitor motif towards anti-tuberculosis agents” [Bioorg Med Chem 24 (2016) 5172–5182]. Bioorg Med Chem 2017; 25:5889. [DOI: 10.1016/j.bmc.2017.08.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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20
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Janssens J, Decruy T, Venken K, Seki T, Krols S, Van der Eycken J, Tsuji M, Elewaut D, Van Calenbergh S. Efficient Divergent Synthesis of New Immunostimulant 4″-Modified α-Galactosylceramide Analogues. ACS Med Chem Lett 2017. [PMID: 28626526 PMCID: PMC5467197 DOI: 10.1021/acsmedchemlett.7b00107] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
![]()
A synthesis strategy
for the swift generation of 4″-modified
α-galactosylceramide (α-GalCer) analogues is described,
establishing a chemical platform to comprehensively investigate the
structure–activity relationships (SAR) of this understudied
glycolipid part. The strategy relies on a late-stage reductive ring-opening
of a p-methoxybenzylidene (PMP) acetal to regioselectively
liberate the 4″-OH position. The expediency of this methodology
is demonstrated by the synthesis of a small yet diverse set of analogues,
which were tested for their ability to stimulate invariant natural
killer T-cells (iNKT) in vitro and in vivo. The introduction of a p-chlorobenzyl
ether yielded an analogue with promising immunostimulating properties,
paving the way for further SAR studies.
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Affiliation(s)
- Jonas Janssens
- Laboratory for Medicinal Chemistry, Department of Pharmaceutics (FFW), Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium
- Laboratory for Organic and Bioorganic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 (S4), B-9000 Ghent, Belgium
| | - Tine Decruy
- Department of Internal Medicine, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan 185, B-9000 Ghent, Belgium
- VIB Inflammation Research Center, Ghent University, B-9000 Ghent, Belgium
| | - Koen Venken
- Department of Internal Medicine, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan 185, B-9000 Ghent, Belgium
- VIB Inflammation Research Center, Ghent University, B-9000 Ghent, Belgium
| | - Toshiyuki Seki
- Aaron Diamond AIDS Research Center, The Rockefeller University, 1230 York Avenue, New York, New York 10065, United States
- Department of Obstetrics and Gynecology, The Jikei University School of Medicine, 3-25-8 Nishi-Shimbashi, Minato-ku, Tokyo 105-8461, Japan
| | - Simon Krols
- Laboratory for Medicinal Chemistry, Department of Pharmaceutics (FFW), Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium
| | - Johan Van der Eycken
- Laboratory for Organic and Bioorganic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 (S4), B-9000 Ghent, Belgium
| | - Moriya Tsuji
- Aaron Diamond AIDS Research Center, The Rockefeller University, 1230 York Avenue, New York, New York 10065, United States
| | - Dirk Elewaut
- Department of Internal Medicine, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan 185, B-9000 Ghent, Belgium
- VIB Inflammation Research Center, Ghent University, B-9000 Ghent, Belgium
| | - Serge Van Calenbergh
- Laboratory for Medicinal Chemistry, Department of Pharmaceutics (FFW), Ghent University, Ottergemsesteenweg 460, B-9000 Ghent, Belgium
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21
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Popović V, Goeman JL, Bougarne N, Eyckerman S, Heyerick A, De Bosscher K, Van der Eycken J. Involvement of the Glucocorticoid Receptor in Pro-inflammatory Transcription Factor Inhibition by Daucane Esters from Laserpitium zernyi. J Nat Prod 2017; 80:1505-1513. [PMID: 28489375 DOI: 10.1021/acs.jnatprod.7b00012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Species of the genus Laserpitium have been used traditionally to treat inflammation and infection. From the herb of Laserpitium zernyi, six new compounds were isolated and their structures elucidated (using IR, NMR, HRMS data) as derivatives of 8-daucene-2,4,10-triol (1, 2, and 4), 7-daucene-2,4,10-triol (3), a lapiferin derivative featuring a C-2 ester moiety (5), and a daucane featuring an exomethylene group at C-8 (6). Also isolated were the rare daucanes vaginatin (7) and laserpitin (8). In a search for selective glucocorticoid receptor (GR) modulators, the compounds were tested for their capacity to inhibit NF-κB and AP-1 pro-inflammatory factors and for a potential competitive effect on a dexamethasone (Dex)-induced GR-driven glucocorticoid response element (GRE) reporter gene. The new 2β-angeloyloxy-10α-acetoxy-8-daucene-2,4,10-triol (2) significantly inhibited transactivation of both NF-κB and AP-1, while vaginatin (7) was the most active of the compounds tested in blocking AP-1. Both compounds competitively repressed Dex-induced GRE-driven promoter activities, indicative of a potential role for GR. In addition, a decreased potential to inhibit NF-κB was apparent in GR knockout A549 cells. In line with the transcriptional assays, compounds 2 and 7 also significantly lowered CCL-2 chemokine production, albeit to a lesser extent than Dex. The results suggest that daucanes may be interesting candidates in the search for compounds with GR-modulating activities.
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Affiliation(s)
- Višnja Popović
- Laboratory for Organic and Bio-Organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University , Krijgslaan 281 (S.4), B-9000 Ghent, Belgium
- Receptor Research Laboratories, Nuclear Receptor Lab, VIB-UGent Center for Medical Biotechnology , Albert Baertsoenkaai 3, B-9000 Ghent, Belgium
| | - Jan L Goeman
- Laboratory for Organic and Bio-Organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University , Krijgslaan 281 (S.4), B-9000 Ghent, Belgium
| | - Nadia Bougarne
- Receptor Research Laboratories, Nuclear Receptor Lab, VIB-UGent Center for Medical Biotechnology , Albert Baertsoenkaai 3, B-9000 Ghent, Belgium
| | - Sven Eyckerman
- Department of Biochemistry, Ghent University , Albert Baertsoenkaai 3, B-9000 Ghent, Belgium
- VIB-UGent Center for Medical Biotechnology , Albert Baertsoenkaai 3, B-9000 Ghent, Belgium
| | - Arne Heyerick
- Reliable Cancer Therapies , Boechoutlaan 221, B-1853 Strombeek-Bever, Belgium
| | - Karolien De Bosscher
- Receptor Research Laboratories, Nuclear Receptor Lab, VIB-UGent Center for Medical Biotechnology , Albert Baertsoenkaai 3, B-9000 Ghent, Belgium
- Department of Biochemistry, Ghent University , Albert Baertsoenkaai 3, B-9000 Ghent, Belgium
| | - Johan Van der Eycken
- Laboratory for Organic and Bio-Organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University , Krijgslaan 281 (S.4), B-9000 Ghent, Belgium
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22
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Kumar P, Matta A, Singh S, Van der Eycken J, Len C, Parmar VS, Van der Eycken EV, Singh BK. Facile, catalyst-free, microwave-assisted access toward the synthesis of 2-aryl/alkyl-3-(1H-benzo[d]imidazol-2-yl)-2, 3-dihydroquinazolin-4(1H)-ones. SYNTHETIC COMMUN 2017. [DOI: 10.1080/00397911.2016.1277761] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Prashant Kumar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Akanksha Matta
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
- Laboratory for Organic and Bioorganic Synthesis, Department of Organic Chemistry, Ghent University, Ghent, Belgium
| | - Snigdha Singh
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Johan Van der Eycken
- Laboratory for Organic and Bioorganic Synthesis, Department of Organic Chemistry, Ghent University, Ghent, Belgium
| | - Christophe Len
- Sorbonne Universities, University of Technology of Compiègne (UTC), Ecole Supérieure de Chimie Organique et Minérale (ESCOM0), Compiegne Cedex, France
- Department of Chemistry, University of Hull, Hull, UK
| | - Virinder S. Parmar
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
| | - Erik V. Van der Eycken
- Laboratory for Organic and Microwave-Assisted Chemistry, Department of Chemistry, University of Leuven (KU Leuven) Leuven, Belgium
| | - Brajendra K. Singh
- Bioorganic Laboratory, Department of Chemistry, University of Delhi, Delhi, India
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23
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Popović V, Goeman J, Thommis J, Heyerick A, Caroen J, Van der Eycken J, De Bosscher K. Daucane esters from laserwort (Laserpitium latifolium L.) inhibit cytokine and chemokine production in human lung epithelial cells. Phytomedicine 2017; 26:28-36. [PMID: 28257662 DOI: 10.1016/j.phymed.2017.01.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2016] [Revised: 12/21/2016] [Accepted: 01/04/2017] [Indexed: 06/06/2023]
Abstract
BACKGROUND Laserwort, Laserpitium latifolium L. (Apiaceae), is a European medicinal plant. Its roots and rhizomes were traditionally used as a general tonic and to treat inflammatory and infective diseases. PURPOSE The anti-inflammatory potential of daucane esters, isolated from underground parts extract of L. latifolium and specific structural features that contribute to their activity were investigated. In addition, we studied their interference with the transactivation capacity of the Glucocorticoid Receptor when added together with a classic glucocorticoid (GC), dexamethasone (DEX). This particular property may be relevant in combination strategies, attempting to circumvent diabetogenic side effects of glucocorticoids upon long-term anti-inflammatory treatments. MATERIALS AND METHODS Nine L. latifolium daucane esters were isolated and elucidated as derivatives of desoxodehydrolaserpitin, laserpitin and a novel 2β-esterified laserpitinol analogue. Of all compounds effects on NF-κB- and AP-1-driven pro-inflammatory pathways were assessed using TNF- or PMA-induced reporter gene analysis in A549 cells. Daucanes with a strong and concentration-dependent inhibition of both NF-κB and AP-1, were tested for a potential effect on DEX-stimulated GR-driven Glucocorticoid Response Element (GRE) reporter gene activity. In addition, GRE-driven anti-inflammatory mRNA expression was determined (GILZ and DUSP1). Also anti-inflammatory properties were validated by monitoring effects on CCL-2, IL-6, IL-1β mRNA expression levels (qPCR) and on CCL-2 chemokine production (ELISA). RESULTS Daucanes featuring an ester moiety and/or a hydroxy group at positions 2β, 6α and 10α and especially the novel 2β-esterified laserpitinol derivative that, in comparison to other isolated compounds, features an additional 9α-hydroxy group, demonstrated suppression of both NF-κB- and AP-1-dependent pro-inflammatory pathways. Remarkably, those entities competitively and concentration-dependently repressed GR-driven GRE-dependent reporter gene activities. The most active compounds inhibited CCL-2 protein excretion and compound 4 downregulated genes coding for IL-1β and IL-6 induced upon TNF treatment in A549. In absence of TNF, compound 4 upregulated the GRE-mediated anti-inflammatory gene GILZ, but not DUSP1. CONCLUSIONS Daucane esters are novel anti-inflammatory agents that may, in combination with GCs, potentially improve therapeutic benefit. These results contribute to the ongoing search for novel anti-inflammatory agents as safer alternatives to, or with, GCs.
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Affiliation(s)
- Višnja Popović
- Receptor Research Laboratories, Nuclear Receptor Lab, VIB-Medical Biotechnology Center, VIB, Ghent University, Albert Baertsoenkaai 3, B-9000 Ghent, Belgium; Laboratory for Organic and Bio-Organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, B-9000 Ghent, Belgium; Cancer Research Institute Ghent (CRIG), Ghent, Belgium.
| | - Jan Goeman
- Laboratory for Organic and Bio-Organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, B-9000 Ghent, Belgium
| | - Jonathan Thommis
- Receptor Research Laboratories, Nuclear Receptor Lab, VIB-Medical Biotechnology Center, VIB, Ghent University, Albert Baertsoenkaai 3, B-9000 Ghent, Belgium
| | - Arne Heyerick
- Reliable Cancer Therapies, Boechoutlaan 221, B-1853 Strombeek-Bever, Belgium
| | - Jurgen Caroen
- Laboratory for Organic and Bio-Organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, B-9000 Ghent, Belgium
| | - Johan Van der Eycken
- Laboratory for Organic and Bio-Organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281 S4, B-9000 Ghent, Belgium; Cancer Research Institute Ghent (CRIG), Ghent, Belgium
| | - Karolien De Bosscher
- Receptor Research Laboratories, Nuclear Receptor Lab, VIB-Medical Biotechnology Center, VIB, Ghent University, Albert Baertsoenkaai 3, B-9000 Ghent, Belgium; Department of Biochemistry, Ghent University, Albert Baertsoenkaai 3, B-9000 Ghent, Belgium; Cancer Research Institute Ghent (CRIG), Ghent, Belgium
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Song L, Risseeuw MDP, Froeyen M, Karalic I, Goeman J, Cappoen D, Van der Eycken J, Cos P, Munier-Lehmann H, Van Calenbergh S. Elaboration of a proprietary thymidylate kinase inhibitor motif towards anti-tuberculosis agents. Bioorg Med Chem 2016; 24:5172-5182. [PMID: 27614917 DOI: 10.1016/j.bmc.2016.08.041] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Revised: 08/20/2016] [Accepted: 08/22/2016] [Indexed: 02/02/2023]
Abstract
We report the design and synthesis of a series of non-nucleoside MtbTMPK inhibitors (1-14) based on the gram-positive bacterial TMPK inhibitor hit compound 1. A practical synthesis was developed to access these analogues. Several compounds show promising MtbTMPK inhibitory potency and allow the establishment of a structure-activity relationship, which is helpful for further optimization.
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Affiliation(s)
- Lijun Song
- Laboratory for Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteemweg 460, B-9000 Ghent, Belgium
| | - Martijn D P Risseeuw
- Laboratory for Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteemweg 460, B-9000 Ghent, Belgium
| | - Matheus Froeyen
- Medicinal Chemistry (Rega Institute), Department of Pharmaceutical and Pharmacological Sciences, KU LEUVEN, Minderbroedersstraat 10 blok x-box 1030, 3000 Leuven, Belgium
| | - Izet Karalic
- Laboratory for Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteemweg 460, B-9000 Ghent, Belgium
| | - Jan Goeman
- Laboratory for Organic and Bioorganic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281, S4, B-9000 Ghent, Belgium
| | - Davie Cappoen
- Laboratory for Microbiology, Parasitology and Hygiene (LMPH), Department of Pharmaceutical Sciences, University of Antwerp, Campus Drie Eiken, Universiteitsplein 1, B-2610 Antwerpen,. Belgium
| | - Johan Van der Eycken
- Laboratory for Organic and Bioorganic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University, Krijgslaan 281, S4, B-9000 Ghent, Belgium
| | - Paul Cos
- Laboratory for Microbiology, Parasitology and Hygiene (LMPH), Department of Pharmaceutical Sciences, University of Antwerp, Campus Drie Eiken, Universiteitsplein 1, B-2610 Antwerpen,. Belgium
| | - Hélène Munier-Lehmann
- Institut Pasteur, Unit of Chemistry and Biocatalysis, Department of Structural Biology and Chemistry, 28 Rue du Dr. Roux, 75724 Paris Cedex 15, France; CNRS UMR3523, Paris, France
| | - Serge Van Calenbergh
- Laboratory for Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Ghent University, Ottergemsesteemweg 460, B-9000 Ghent, Belgium.
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Caroen J, Clemmen A, Kámán J, Backaert F, Goeman JL, Fülöp F, Van der Eycken J. Solid-phase synthesis of 6,7-cycloalkane-fused 1,4-diazepane-2,5-diones via a cyclization/release strategy. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.11.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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26
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Murlykina MV, Sakhno YI, Desenko SM, Shishkina SV, Shishkin OV, Sysoiev DO, Kornet MN, Schols D, Goeman JL, Van der Eycken J, Van der Eycken EV, Chebanov VA. Study of the Chemoselectivity of Multicomponent Heterocyclizations Involving 3-Amino-1,2,4-triazole and Pyruvic Acids as Key Reagents, and Biological Activity of the Reaction Products. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500469] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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27
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Peshkov AA, Nechaev AA, Pereshivko OP, Goeman JL, Van der Eycken J, Peshkov VA, Van der Eycken EV. Gold- and Silver-Catalyzed 7-endo-digCyclizations for the Synthesis of Oxazepines. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500357] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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28
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De Gussem E, Cornelus J, Pieters S, Van den Bossche D, Van der Eycken J, Herrebout W, Bultinck P. Synthesis of the Natural Product Building Block 5‐(3‐Bromophenyl)‐4‐hydroxy‐5‐methylhexan‐2‐one and its Chiral Characterization by Using Chiroptical Spectroscopy. Chemphyschem 2013; 14:3255-62. [DOI: 10.1002/cphc.201300551] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Ewoud De Gussem
- Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281‐S3, 9000 Gent (Belgium)
- The European Centre for Chirality (EC2), Groenenborgerlaan 171, 2020 Antwerp (Belgium)
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp (Belgium)
| | - Jelle Cornelus
- Department of Organic Chemistry, Ghent University, Krijgslaan 281‐S4, 9000 Gent (Belgium)
| | - Sam Pieters
- Department of Organic Chemistry, Ghent University, Krijgslaan 281‐S4, 9000 Gent (Belgium)
| | - Dries Van den Bossche
- Department of Organic Chemistry, Ghent University, Krijgslaan 281‐S4, 9000 Gent (Belgium)
| | - Johan Van der Eycken
- Department of Organic Chemistry, Ghent University, Krijgslaan 281‐S4, 9000 Gent (Belgium)
| | - Wouter Herrebout
- The European Centre for Chirality (EC2), Groenenborgerlaan 171, 2020 Antwerp (Belgium)
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp (Belgium)
| | - Patrick Bultinck
- Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281‐S3, 9000 Gent (Belgium)
- The European Centre for Chirality (EC2), Groenenborgerlaan 171, 2020 Antwerp (Belgium)
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Esposito S, Deventer K, Goeman J, Van der Eycken J, Van Eenoo P. Synthesis and characterization of the N-terminal acetylated 17-23 fragment of thymosin beta 4 identified in TB-500, a product suspected to possess doping potential. Drug Test Anal 2012; 4:733-8. [DOI: 10.1002/dta.1402] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Revised: 07/12/2012] [Accepted: 07/12/2012] [Indexed: 11/08/2022]
Affiliation(s)
- Simone Esposito
- Doping Control Laboratory (DoCoLab); Department of Clinical Chemistry, Microbiology and Immunology; Ghent University (UGent); Technologiepark 30; B-9052; Zwijnaarde; Belgium
| | - Koen Deventer
- Doping Control Laboratory (DoCoLab); Department of Clinical Chemistry, Microbiology and Immunology; Ghent University (UGent); Technologiepark 30; B-9052; Zwijnaarde; Belgium
| | - Jan Goeman
- Laboratory for Organic and Bioorganic Synthesis; Department of Organic Chemistry; Ghent University; Krijgslaan 281 (S4); B-9000; Ghent; Belgium
| | - Johan Van der Eycken
- Laboratory for Organic and Bioorganic Synthesis; Department of Organic Chemistry; Ghent University; Krijgslaan 281 (S4); B-9000; Ghent; Belgium
| | - Peter Van Eenoo
- Doping Control Laboratory (DoCoLab); Department of Clinical Chemistry, Microbiology and Immunology; Ghent University (UGent); Technologiepark 30; B-9052; Zwijnaarde; Belgium
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30
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Arin M, Lommens P, Hopkins SC, Pollefeyt G, Van der Eycken J, Ricart S, Granados X, Glowacki BA, Van Driessche I. Deposition of photocatalytically active TiO2 films by inkjet printing of TiO2 nanoparticle suspensions obtained from microwave-assisted hydrothermal synthesis. Nanotechnology 2012; 23:165603. [PMID: 22460736 DOI: 10.1088/0957-4484/23/16/165603] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In this paper, we present an inkjet printing approach suited for the deposition of photocatalytically active, transparent titanium oxide coatings from an aqueous, colloidal suspension. We used a bottom-up approach in which a microwave-assisted hydrothermal treatment of titanium propoxide aqueous solutions in the presence of ethylenediaminetetraacetic acid and triethanolamine was used to create suspensions containing titania nanoparticles. Different inkjet printing set-ups, electromagnetic and piezoelectric driven, were tested to deposit the inks on glass substrates. The presence of preformed titania nanoparticles was expected to make it possible to reduce the heating temperature necessary to obtain the functionality of photocatalysis which can widen the application range of the approach to heat-sensitive substrates. We investigated the crystallinity and size of the obtained nanoparticles by electron microscopy and dynamic light scattering. The rheological properties of the suspensions were evaluated against the relevant criteria for inkjet printing and the jettability was analyzed. The photocatalytic activity of the obtained layers was analyzed by following the decomposition of a methylene blue solution under UV illumination. The influence of the heat treatment temperature on the film roughness, thickness and photocatalytic activity was studied. Good photocatalytic performance was achieved for heat treatments at temperatures as low as 150 °C, introducing the possibility of using this approach for heat-sensitive substrates.
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Affiliation(s)
- Melis Arin
- SCRIPTS, Department of Inorganic and Physical Chemistry, Ghent University, Krijgslaan 281 (S3), B-9000 Ghent, Belgium
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Bert K, Noël T, Kimpe W, Goeman JL, Van der Eycken J. Chiral imidate–ferrocenylphosphanes: synthesis and application as P,N-ligands in iridium(i)-catalyzed hydrogenation of unfunctionalized and poorly functionalized olefins. Org Biomol Chem 2012; 10:8539-50. [DOI: 10.1039/c2ob25871d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Gök Y, Noël T, Van der Eycken J. Novel C2-symmetric bisoxazolines with a chiral trans-(2R,3R)-diphenylcyclopropane backbone: preparation and application in several enantioselective catalytic reactions. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.07.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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33
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Meert N, Waterloos MA, Van Landschoot M, Dhondt A, Ledebo I, Glorieux G, Goeman J, Van der Eycken J, Vanholder R. Prospective Evaluation of the Change of Predialysis Protein-Bound Uremic Solute Concentration With Postdilution Online Hemodiafiltration. Artif Organs 2010; 34:580-5. [DOI: 10.1111/j.1525-1594.2010.01005.x] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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Noël T, Bert K, Van der Eycken E, Van der Eycken J. Imidate-Phosphanes as Highly Versatile N,P Ligands and Their Application in Palladium-Catalyzed Asymmetric Allylic Alkylation Reactions. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000238] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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35
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Noël T, Gök Y, Eycken JVD. Rhodium/olefin-catalyzed reaction of arylboronic acids with an α-acetamido acrylic ester: Mizoroki–Heck-type reaction versus asymmetric conjugate addition. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.03.021] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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36
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Van Overschelde M, Vervecken E, Modha SG, Cogen S, Van der Eycken E, Van der Eycken J. Catalyst-free alcoholysis of phosphane-boranes: a smooth, cheap, and efficient deprotection procedure. Tetrahedron 2009. [DOI: 10.1016/j.tet.2009.05.063] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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37
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Ruttens B, Blom P, Van Hoof S, Hubrecht I, Van der Eycken J, Sas B, Van Hemel J, Vandenkerckhove J. Carbohydrate-Based Macrolides Prepared via a Convergent Ring Closing Metathesis Approach: In Search for Novel Antibiotics. J Org Chem 2007; 72:5514-22. [PMID: 17583955 DOI: 10.1021/jo061929q] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient convergent approach has been developed for the construction of novel, nonnatural polysubstituted carbohydrate-based macrolides. A key step in the synthesis is the formation of the macrocyclic ring via a ring-closing metathesis reaction. The obtained macrolide analogues have been screened for biological activity against gram-positive and gram-negative bacteria, yeasts, and molds.
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Affiliation(s)
- Bart Ruttens
- Laboratory for Organic and Bioorganic Synthesis, Department of Organic Chemistry, Ghent University, Krijgslaan 281 (S4), B-9000 Gent, Belgium
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Devreux V, Wiesner J, Jomaa H, Van der Eycken J, Van Calenbergh S. Synthesis and evaluation of alpha,beta-unsaturated alpha-aryl-substituted fosmidomycin analogues as DXR inhibitors. Bioorg Med Chem Lett 2007; 17:4920-3. [PMID: 17583502 DOI: 10.1016/j.bmcl.2007.06.026] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2007] [Revised: 06/06/2007] [Accepted: 06/07/2007] [Indexed: 10/23/2022]
Abstract
Fosmidomycin, which acts through inhibition of 1-deoxy-D-xylulose phosphate reductoisomerase (DXR) in the non-mevalonate pathway, represents a valuable recent addition to the armamentarium against uncomplicated malaria. In this paper, we describe the synthesis and biological evaluation of E- and Z-alpha,beta-unsaturated alpha-aryl-substituted analogues of FR900098, a fosmidomycin congener, utilizing a Stille or a Suzuki coupling to introduce the aryl group. In contrast with our expectations based on the promising activity earlier observed for several alpha-substituted fosmidomycin analogues, all synthesized analogues exhibited much lower binding affinity for DXR than fosmidomycin.
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Affiliation(s)
- Vincent Devreux
- Laboratory for Medicinal Chemistry (FFW), Ghent University, Harelbekestraat 72, B-9000, Gent, Belgium
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Devreux V, Wiesner J, Jomaa H, Rozenski J, Van der Eycken J, Van Calenbergh S. Divergent Strategy for the Synthesis of α-Aryl-Substituted Fosmidomycin Analogues. J Org Chem 2007; 72:3783-9. [PMID: 17428097 DOI: 10.1021/jo0700981] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Fosmidomycin is the first representative of a new class of antimalarial drugs acting through inhibition of 1-deoxy-D-xylulose 5-phosphate (DOXP) reductoisomerase (DXR), an essential enzyme in the non-mevalonate pathway for the synthesis of isoprenoids. This work describes a divergent strategy for the synthesis of a series of alpha-aryl-substituted fosmidomycin analogues, featuring a palladium-catalyzed Stille coupling as the key step. An alpha-(4-cyanophenyl)fosmidomycin analogue emerged as the most potent analogue in the present series. Its antimalarial activity clearly surpasses that of the reference compound fosmidomycin.
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Affiliation(s)
- Vincent Devreux
- Laboratory for Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Ghent University, Belgium
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Kaval N, Singh BK, Ermolat'ev DS, Claerhout S, Parmar VS, der Eycken JV, der Eycken EV. Transition Metal-Catalyzed Orthogonal Solid-Phase Decoration of the 2(1H)-Pyrazinone Scaffold Using a Sulfur Linker. ACTA ACUST UNITED AC 2007; 9:446-53. [PMID: 17373850 DOI: 10.1021/cc060105j] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new transition metal-catalyzed orthogonal solid-phase protocol for the synthesis of highly substituted 2(1H)-pyrazinones was developed, on the basis of Chan-Lam arylation and Liebeskind-Srogl cross-coupling reactions. This strategy opens the way for the generation of small libraries of 2(1H)-pyrazinone analogues for biological screening.
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Affiliation(s)
- Nadya Kaval
- Laboratory for Organic & Microwave-Assisted Chemistry, Department of Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
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Debie E, Kuppens T, Vandyck K, Van der Eycken J, Van Der Veken B, Herrebout W, Bultinck P. Vibrational circular dichroism DFT study on bicyclo[3.3.0]octane derivatives. ACTA ACUST UNITED AC 2006. [DOI: 10.1016/j.tetasy.2006.11.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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42
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Vandyck K, Matthys B, Willen M, Robeyns K, Van Meervelt L, Van der Eycken J. Rhodium-Catalyzed Asymmetric Conjugate Additions of Boronic Acids to enones using DIPHONANE: a novel chiral bisphosphine ligand. Org Lett 2006; 8:363-6. [PMID: 16435835 DOI: 10.1021/ol0522788] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] The synthesis of a novel enantiopure C2-symmetric bisphosphine, DIPHONANE, was accomplished starting from 2,5-norbornadione, utilizing (R,R)- and/or (S,S)-(2,3-O-di[(phenylamino)carbonyl]tartaric acid for the resolution of an intermediate phosphineoxide. The application of this ligand in the rhodium-catalyzed asymmetric conjugate addition of boronic acids to cyclic enones provides the 1,4-addition products in good yields (69-98%) and high ee's (78-95% ee). A byproduct arising from a consecutive 1,4-addition and 1,2-addition was also observed.
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Affiliation(s)
- Koen Vandyck
- Laboratory for Organic and Bioorganic Synthesis, Department of Organic Chemistry, Ghent University, Krijgslaan 281 (S.4), B-9000 Gent, Belgium
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Schepers E, Meert N, Glorieux G, Goeman J, Van der Eycken J, Vanholder R. P-cresylsulphate, the main in vivo metabolite of p-cresol, activates leucocyte free radical production. Nephrol Dial Transplant 2006; 22:592-6. [PMID: 17040995 DOI: 10.1093/ndt/gfl584] [Citation(s) in RCA: 226] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Chronic renal insufficiency is associated with the retention of solutes normally excreted by healthy kidneys. P-cresol, a prototype protein-bound uraemic retention solute, has been shown to exert toxic effects in vitro. Recently, however, it has been demonstrated that p-cresol in the human body is conjugated, with p-cresylsulphate as the main metabolite. METHODS The present study evaluates the effect of p-cresylsulphate on the respiratory burst activity of leucocytes. RESULTS P-cresylsulphate significantly increased the percentage of leucocytes displaying oxidative burst activity at baseline. Oxidative burst activity of stimulated leucocytes was however not affected. In contrast, p-cresol had no effect on the leucocytes at baseline, but inhibited leucocytes burst activity after stimulation. CONCLUSION The present study demonstrates, for the first time, that p-cresylsulphate, the main in vivo metabolite of p-cresol, has a pro-inflammatory effect on unstimulated leucocytes. This effect could contribute to the propensity to vascular disease in the uraemic population.
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Affiliation(s)
- Eva Schepers
- Renal Division, Department of Internal Medicine, University Hospital, De Pintelaan 185, 9000 Gent, Belgium
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Devreux V, Wiesner J, Goeman JL, Van der Eycken J, Jomaa H, Van Calenbergh S. Synthesis and Biological Evaluation of Cyclopropyl Analogues of Fosmidomycin as Potent Plasmodium falciparum Growth Inhibitors. J Med Chem 2006; 49:2656-60. [PMID: 16610809 DOI: 10.1021/jm051177c] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of fosmidomycin analogues featuring restricted conformational mobility has been synthesized and evaluated as inhibitors of 1-deoxy-D-xylulose 5-phosphate (DOXP) reductoisomerase and as growth inhibitors of P. falciparum. The enantiomerically pure trans-cyclopropyl N-acetyl analogue 3b showed comparable inhibitory activity as fosmidomycin toward E. coli DOXP reductoisomerase and proved equally active when tested in vitro for P. falciparum growth inhibition. Conversely, the alpha-phenyl cis-cyclopropyl analogue 4 showed virtually no inhibition of the enzyme.
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Affiliation(s)
- Vincent Devreux
- Laboratory for Medicinal Chemistry, Faculty of Pharmaceutical Sciences, Ghent University, Harelbekestraat 72, B-9000 Gent, Belgium
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45
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Van Hoof S, Ruttens B, Hubrecht I, Smans G, Blom P, Sas B, Van hemel J, Vandenkerckhove J, Van der Eycken J. Synthesis and screening of bicyclic carbohydrate-based compounds: A novel type of antivirals. Bioorg Med Chem Lett 2006; 16:1495-8. [PMID: 16403628 DOI: 10.1016/j.bmcl.2005.12.048] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2005] [Revised: 12/12/2005] [Accepted: 12/12/2005] [Indexed: 10/25/2022]
Abstract
A small library of bicyclic carbohydrate derivatives was synthesized and screened. A strong and selective activity against cytomegalovirus was found. Structure-activity relationship for this new type of antivirals is discussed.
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Affiliation(s)
- Steven Van Hoof
- Laboratory for Organic and Bioorganic Synthesis, Department of Organic Chemistry, Ghent University, Krijgslaan 281 (S.4), B-9000 Ghent, Belgium
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46
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Blom P, Ruttens B, Van Hoof S, Hubrecht I, Van der Eycken J, Sas B, Van hemel J, Vandenkerckhove J. A Convergent Ring-Closing Metathesis Approach to Carbohydrate-Based Macrolides with Potential Antibiotic Activity. J Org Chem 2005; 70:10109-12. [PMID: 16292849 DOI: 10.1021/jo051021k] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
[reaction: see text] An efficient convergent approach has been developed for the construction of novel, non-natural, carbohydrate-based macrolides. The key step in the synthesis is the formation of the macrocyclic ring via a ring-closing metathesis reaction. The obtained macrolide analogues have been screened for biological activity against gram-positive and gram-negative bacteria, including resistant strains, yeasts, and molds.
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Affiliation(s)
- Petra Blom
- Laboratory for Organic and Bioorganic Synthesis, Department of Organic Chemistry, Ghent University, Krijgslaan 281 (S.4), B-9000 Gent, Belgium
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47
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Kaval N, Halasz-Dajka B, Vo-Thanh G, Dehaen W, Van der Eycken J, Mátyus P, Loupy A, Van der Eycken E. An efficient microwave-assisted solvent-free synthesis of pyrido-fused ring systems applying the tert-amino effect. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.07.046] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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48
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Mangelinckx S, Boeykens M, Vliegen M, Van der Eycken J, De Kimpe N. Synthesis of new 3,3-dimethoxyazetidine-2-carboxylic acid derivatives. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2004.10.125] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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49
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Vandyck K, Matthys B, Van der Eycken J. Synthesis and absolute configuration of (1S,8S)-as-hydrindacene-1,8-diol as determined by the circular dichroism exciton chirality method. Tetrahedron Lett 2005. [DOI: 10.1016/j.tetlet.2004.11.028] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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50
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Morreel K, Ralph J, Lu F, Goeminne G, Busson R, Herdewijn P, Goeman JL, Van der Eycken J, Boerjan W, Messens E. Phenolic profiling of caffeic acid O-methyltransferase-deficient poplar reveals novel benzodioxane oligolignols. Plant Physiol 2004; 136:4023-36. [PMID: 15563622 PMCID: PMC535834 DOI: 10.1104/pp.104.049312] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2004] [Revised: 09/28/2004] [Accepted: 09/28/2004] [Indexed: 05/18/2023]
Abstract
Caffeic acid O-methyltransferase (COMT) catalyzes preferentially the methylation of 5-hydroxyconiferaldehyde to sinapaldehyde in monolignol biosynthesis. Here, we have compared HPLC profiles of the methanol-soluble phenolics fraction of xylem tissue from COMT-deficient and control poplars (Populus spp.), using statistical analysis of the peak heights. COMT down-regulation results in significant concentration differences for 25 of the 91 analyzed peaks. Eight peaks were exclusively detected in COMT-deficient poplar, of which four could be purified for further identification using mass spectrometry/mass spectrometry, nuclear magnetic resonance, and spiking of synthesized reference compounds. These new compounds were derived from 5-hydroxyconiferyl alcohol or 5-hydroxyconiferaldehyde and were characterized by benzodioxane moieties, a structural type that is also increased in the lignins of COMT-deficient plants. One of these four benzodioxanes amounted to the most abundant oligolignol in the HPLC profile. Furthermore, all of the differentially accumulating oligolignols involving sinapyl units were either reduced in abundance or undetectable. The concentration levels of all identified oligolignols were in agreement with the relative supply of monolignols and with their chemical coupling propensities, which supports the random coupling hypothesis. Chiral HPLC analysis of the most abundant benzodioxane dimer revealed the presence of both enantiomers in equal amounts, indicating that they were formed by radical coupling reactions under simple chemical control rather than guided by dirigent proteins.
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Affiliation(s)
- Kris Morreel
- Department of Plant Systems Biology, Flanders Interuniversity Institute for Biotechnology, Ghent University, B-9052 Ghent, Belgium
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