1
|
Franceus J, Steynen M, Allaert Y, Bredael K, D'hooghe M, Desmet T. High-yield synthesis of 2-O-α-D-glucosyl-D-glycerate by a bifunctional glycoside phosphorylase. Appl Microbiol Biotechnol 2024; 108:55. [PMID: 38175244 DOI: 10.1007/s00253-023-12970-x] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 11/02/2023] [Accepted: 11/13/2023] [Indexed: 01/05/2024]
Abstract
Osmolytes are produced by various microorganisms as a defense mechanism to protect cells and macromolecules from damage caused by external stresses in harsh environments. Due to their useful stabilizing properties, these molecules are applied as active ingredients in a wide range of cosmetics and healthcare products. The metabolic pathways and biocatalytic syntheses of glycosidic osmolytes such as 2-O-α-D-glucosyl-D-glycerate often involve the action of a glycoside phosphorylase. Here, we report the discovery of a glucosylglycerate phosphorylase from carbohydrate-active enzyme family GH13 that is also active on sucrose, which contrasts the strict specificity of known glucosylglycerate phosphorylases that can only use α-D-glucose 1-phosphate as glycosyl donor in transglycosylation reactions. The novel enzyme can be distinguished from other phosphorylases from the same family by the presence of an atypical conserved sequence motif at specificity-determining positions in the active site. The promiscuity of the sucrose-active glucosylglycerate phosphorylase can be exploited for the high-yielding and rapid synthesis of 2-O-α-D-glucosyl-D-glycerate from sucrose and D-glycerate. KEY POINTS: • A Xylanimonas protaetiae glycoside phosphorylase can use both d-glycerate and fructose as glucosyl acceptor with high catalytic efficiency • Biocatalytic synthesis of the osmolyte 2-O-α-d-glucosyl-d-glycerate • Positions in the active site of GH13 phosphorylases act as convenient specificity fingerprints.
Collapse
Affiliation(s)
- Jorick Franceus
- Centre for Synthetic Biology (CSB), Department of Biotechnology, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Manon Steynen
- Centre for Synthetic Biology (CSB), Department of Biotechnology, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Yentl Allaert
- Centre for Synthetic Biology (CSB), Department of Biotechnology, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Kato Bredael
- SynBioC Research Group, Department of Green Chemistry and Technology, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Green Chemistry and Technology, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Tom Desmet
- Centre for Synthetic Biology (CSB), Department of Biotechnology, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium.
| |
Collapse
|
2
|
Delmulle T, Bovijn S, Deketelaere S, Castelein M, Erauw T, D'hooghe M, Soetaert WK. Engineering Comamonas testosteroni for the production of 2-pyrone-4,6-dicarboxylic acid as a promising building block. Microb Cell Fact 2023; 22:188. [PMID: 37726725 PMCID: PMC10510227 DOI: 10.1186/s12934-023-02202-2] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Accepted: 09/06/2023] [Indexed: 09/21/2023] Open
Abstract
BACKGROUND Plastics are an indispensable part of our daily life. However, mismanagement at their end-of-life results in severe environmental consequences. The microbial conversion of these polymers into new value-added products offers a promising alternative. In this study, we engineered the soil-bacterium Comamonas testosteroni KF-1, a natural degrader of terephthalic acid, for the conversion of the latter to the high-value product 2-pyrone-4,6-dicarboxylic acid. RESULTS In order to convert terephthalic acid to 2-pyrone-4,6-dicarboxylic acid, we deleted the native PDC hydrolase and observed only a limited amount of product formation. To test whether this was the result of an inhibition of terephthalic acid uptake by the carbon source for growth (i.e. glycolic acid), the consumption of both carbon sources was monitored in the wild-type strain. Both carbon sources were consumed at the same time, indicating that catabolite repression was not the case. Next, we investigated if the activity of pathway enzymes remained the same in the wild-type and mutant strain. Here again, no statistical differences could be observed. Finally, we hypothesized that the presence of a pmdK variant in the degradation operon could be responsible for the observed phenotype and created a double deletion mutant strain. This newly created strain accumulated PDC to a larger extent and again consumed both carbon sources. The double deletion strain was then used in a bioreactor experiment, leading to the accumulation of 6.5 g/L of product in 24 h with an overall productivity of 0.27 g/L/h. CONCLUSIONS This study shows the production of the chemical building block 2-pyrone-4,6-dicarboxylic acid from terephthalic acid through an engineered C. testosteroni KF-1 strain. It was observed that both a deletion of the native PDC hydrolase as well as a pmdK variant is needed to achieve high conversion yields. A product titer of 6.5 g/L in 24 h with an overall productivity of 0.27 g/L/h was achieved.
Collapse
Affiliation(s)
- Tom Delmulle
- Centre for Industrial Biotechnology and Biocatalysis (InBio.be), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, Ghent, 9000, Belgium.
| | - Stijn Bovijn
- Centre for Industrial Biotechnology and Biocatalysis (InBio.be), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, Ghent, 9000, Belgium
| | - Sari Deketelaere
- SynBioC Research group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, Ghent, 9000, Belgium
| | - Martijn Castelein
- Centre for Industrial Biotechnology and Biocatalysis (InBio.be), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, Ghent, 9000, Belgium
| | - Tom Erauw
- Centre for Industrial Biotechnology and Biocatalysis (InBio.be), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, Ghent, 9000, Belgium
| | - Matthias D'hooghe
- SynBioC Research group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, Ghent, 9000, Belgium
| | - Wim K Soetaert
- Centre for Industrial Biotechnology and Biocatalysis (InBio.be), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, Ghent, 9000, Belgium
| |
Collapse
|
3
|
Abstract
Histone deacetylases (HDACs) are enzymes pursued as drug targets in various cancers and several non-oncological conditions, such as inflammation and neurodegenerative disorders. In the past decade, HDAC inhibitors (HDACi) have emerged as relevant pharmaceuticals, with many efforts devoted to the development of new representatives. However, the growing safety concerns regarding the established hydroxamic acid-based HDAC inhibitors tend to drive current research more toward the design of inhibitors bearing alternative zinc-binding groups (ZBGs). This Perspective presents an overview of all non-hydroxamic acid ZBGs that have been incorporated into the clinically approved prototypical HDACi, suberoylanilide hydroxamic acid (vorinostat). This provides the unique opportunity to compare the inhibition potential and biological effects of different ZBGs in a direct way, as the compounds selected for this Perspective differ only in their ZBG. To that end, different strategies used to select a ZBG, its properties, activity, and liabilities are discussed.
Collapse
Affiliation(s)
- Silke Geurs
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
- Translational Nuclear Receptor Research, VIB-UGent Center for Medical Biotechnology, Technologiepark-Zwijnaarde 75, B-9052 Ghent, Belgium
| | - Dorien Clarisse
- Translational Nuclear Receptor Research, VIB-UGent Center for Medical Biotechnology, Technologiepark-Zwijnaarde 75, B-9052 Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Technologiepark-Zwijnaarde 75, B-9052 Ghent, Belgium
| | - Karolien De Bosscher
- Translational Nuclear Receptor Research, VIB-UGent Center for Medical Biotechnology, Technologiepark-Zwijnaarde 75, B-9052 Ghent, Belgium
- Department of Biomolecular Medicine, Ghent University, Technologiepark-Zwijnaarde 75, B-9052 Ghent, Belgium
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| |
Collapse
|
4
|
Ronse U, Magdalenić K, Van Camp J, D'hooghe M. Synthesis of the 1,5-Benzothiazepane Scaffold - Established Methods and New Developments. ChemistryOpen 2023; 12:e202200262. [PMID: 36807726 PMCID: PMC9942483 DOI: 10.1002/open.202200262] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 02/04/2023] [Indexed: 02/23/2023] Open
Abstract
The 1,5-benzothiazepane structure is an important heterocyclic moiety present in a variety of commercial drugs and pharmaceuticals. This privileged scaffold exhibits a diversity of biological activities, including antimicrobial, antibacterial, anti-epileptic, anti-HIV, antidepressant, antithrombotic and anticancer properties. Its important pharmacological potential renders research into the development of new and efficient synthetic methods of high relevance. In the first part of this review, an overview of different synthetic approaches toward 1,5-benzothiazepane and its derivatives is provided, ranging from established protocols to recent (enantioselective) methods that promote sustainability. In the second part, several structural characteristics influencing biological activity are briefly explored, providing a few insights into the structure-activity relationships of these compounds.
Collapse
Affiliation(s)
- Ulrike Ronse
- SynBioC Research GroupDepartment of Green Chemistry and TechnologyFaculty of Bioscience EngineeringGhent UniversityCoupure Links 653Ghent9000Belgium
| | - Katarina Magdalenić
- SynBioC Research GroupDepartment of Green Chemistry and TechnologyFaculty of Bioscience EngineeringGhent UniversityCoupure Links 653Ghent9000Belgium
| | - John Van Camp
- Department of Food Technology, Safety and HealthGhent UniversityCoupure Links 653Ghent9000Belgium
| | - Matthias D'hooghe
- SynBioC Research GroupDepartment of Green Chemistry and TechnologyFaculty of Bioscience EngineeringGhent UniversityCoupure Links 653Ghent9000Belgium
| |
Collapse
|
5
|
Deketelaere S, Kaur G, Piens N, Deturck D, Depestel R, Van Hecke K, Stevens CV, Kumar V, D'hooghe M. Synthesis of 4‐imidoyl‐, 4‐oxiranyl‐ and 4‐propargyloxyphenyl‐substituted β‐lactam building blocks. J Heterocycl Chem 2022. [DOI: 10.1002/jhet.4597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sari Deketelaere
- SynBioC Research Group, Department of Green Chemistry and Technology Faculty of Bioscience Engineering, Ghent University, Coupure Links 653 Ghent Belgium
| | - Gurkirat Kaur
- SynBioC Research Group, Department of Green Chemistry and Technology Faculty of Bioscience Engineering, Ghent University, Coupure Links 653 Ghent Belgium
- Department of Chemistry Guru Nanak Dev University Amritsar India
| | - Nicola Piens
- SynBioC Research Group, Department of Green Chemistry and Technology Faculty of Bioscience Engineering, Ghent University, Coupure Links 653 Ghent Belgium
| | - Daan Deturck
- SynBioC Research Group, Department of Green Chemistry and Technology Faculty of Bioscience Engineering, Ghent University, Coupure Links 653 Ghent Belgium
| | - Robin Depestel
- SynBioC Research Group, Department of Green Chemistry and Technology Faculty of Bioscience Engineering, Ghent University, Coupure Links 653 Ghent Belgium
| | - Kristof Van Hecke
- XStruct, Department of Chemistry, Faculty of Sciences Ghent University, Krijgslaan 281‐S3 Ghent Belgium
| | - Christian V. Stevens
- SynBioC Research Group, Department of Green Chemistry and Technology Faculty of Bioscience Engineering, Ghent University, Coupure Links 653 Ghent Belgium
| | - Vipan Kumar
- Department of Chemistry Guru Nanak Dev University Amritsar India
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Green Chemistry and Technology Faculty of Bioscience Engineering, Ghent University, Coupure Links 653 Ghent Belgium
| |
Collapse
|
6
|
Geurs S, Clarisse D, Baele F, Franceus J, Desmet T, De Bosscher K, D'hooghe M. Identification of mercaptoacetamide-based HDAC6 inhibitors via a lean inhibitor strategy: screening, synthesis, and biological evaluation. Chem Commun (Camb) 2022; 58:6239-6242. [PMID: 35510683 DOI: 10.1039/d2cc01550a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Non-selective inhibition of different histone deacetylase enzymes by hydroxamic acid-based drugs causes severe side effects when used as a (long-term) cancer treatment. In this work, we searched for a potent zinc-binding group able to replace the contested hydroxamic acid by employing a lean inhibitor strategy. This instructed the synthesis of a set of HDAC6-selective inhibitors containing the more desirable mercaptoacetamide moiety. Biological evaluation of these new compounds showed an IC50 in the nanomolar range, dose-dependent HDAC6 inhibition in MM1.S cells and improved genotoxicity results, rendering these new inhibitors valuable hits for applications even beyond oncology.
Collapse
Affiliation(s)
- Silke Geurs
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium. .,Translational Nuclear Receptor Research, VIB-UGent Center for Medical Biotechnology, Technologiepark-Zwijnaarde 75, FSVMII, Zwijnaarde, Belgium
| | - Dorien Clarisse
- Translational Nuclear Receptor Research, VIB-UGent Center for Medical Biotechnology, Technologiepark-Zwijnaarde 75, FSVMII, Zwijnaarde, Belgium.,Department of Biomolecular Medicine, Ghent University, Technologiepark-Zwijnaarde 75, FSVMII, Zwijnaarde, Belgium
| | - Freya Baele
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium.
| | - Jorick Franceus
- Center for Synthetic Biology (CSB), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Tom Desmet
- Center for Synthetic Biology (CSB), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Karolien De Bosscher
- Translational Nuclear Receptor Research, VIB-UGent Center for Medical Biotechnology, Technologiepark-Zwijnaarde 75, FSVMII, Zwijnaarde, Belgium.,Department of Biomolecular Medicine, Ghent University, Technologiepark-Zwijnaarde 75, FSVMII, Zwijnaarde, Belgium
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium.
| |
Collapse
|
7
|
Van de Walle T, Cools L, Mangelinckx S, D'hooghe M. Recent contributions of quinolines to antimalarial and anticancer drug discovery research. Eur J Med Chem 2021; 226:113865. [PMID: 34655985 DOI: 10.1016/j.ejmech.2021.113865] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [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: 02/09/2021] [Revised: 09/01/2021] [Accepted: 09/20/2021] [Indexed: 12/28/2022]
Abstract
Quinoline, a privileged scaffold in medicinal chemistry, has always been associated with a multitude of biological activities. Especially in antimalarial and anticancer research, quinoline played (and still plays) a central role, giving rise to the development of an array of quinoline-containing pharmaceuticals in these therapeutic areas. However, both diseases still affect millions of people every year, pointing to the necessity of new therapies. Quinolines have a long-standing history as antimalarial agents, but established quinoline-containing antimalarial drugs are now facing widespread resistance of the Plasmodium parasite. Nevertheless, as evidenced by a massive number of recent literature contributions, they are still of great value for future developments in this field. On the other hand, the number of currently approved anticancer drugs containing a quinoline scaffold are limited, but a strong increase and interest in quinoline compounds as potential anticancer agents can be seen in the last few years. In this review, a literature overview of recent contributions made by quinoline-containing compounds as potent antimalarial or anticancer agents is provided, covering publications between 2018 and 2020.
Collapse
Affiliation(s)
- Tim Van de Walle
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Lore Cools
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Sven Mangelinckx
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium.
| |
Collapse
|
8
|
Deketelaere S, Van Den Broeck E, Cools L, Deturck D, Naeyaert H, Van Hecke K, Stevens CV, Van Speybroeck V, D'hooghe M. Unexpected Formation of 2,2‐Dichloro‐
N
‐(chloromethyl)acetamides during Attempted Staudinger 2,2‐Dichloro‐β‐lactam Synthesis. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sari Deketelaere
- SynBioC Research Group Department of Green Chemistry and Technology Faculty of Bioscience Engineering Ghent University Coupure Links 653 9000 Ghent Belgium
| | - Elias Van Den Broeck
- Center for Molecular Modeling Ghent University Technologiepark 46 9052 Zwijnaarde Belgium
| | - Lore Cools
- SynBioC Research Group Department of Green Chemistry and Technology Faculty of Bioscience Engineering Ghent University Coupure Links 653 9000 Ghent Belgium
| | - Daan Deturck
- SynBioC Research Group Department of Green Chemistry and Technology Faculty of Bioscience Engineering Ghent University Coupure Links 653 9000 Ghent Belgium
| | - Hannes Naeyaert
- Center for Molecular Modeling Ghent University Technologiepark 46 9052 Zwijnaarde Belgium
| | - Kristof Van Hecke
- XStruct Department of Chemistry Faculty of Sciences Ghent University Krijgslaan 281-S3 9000 Ghent Belgium
| | - Christian V. Stevens
- SynBioC Research Group Department of Green Chemistry and Technology Faculty of Bioscience Engineering Ghent University Coupure Links 653 9000 Ghent Belgium
| | | | - Matthias D'hooghe
- SynBioC Research Group Department of Green Chemistry and Technology Faculty of Bioscience Engineering Ghent University Coupure Links 653 9000 Ghent Belgium
| |
Collapse
|
9
|
Van de Walle T, Briand M, Mitrović A, Sosič I, Gobec S, Kos J, Persoons L, Daelemans D, De Jonghe S, Ubiparip Z, Desmet T, Van Hecke K, Mangelinckx S, D'hooghe M. Synthesis of Novel Nitroxoline Analogs with Potent Cathepsin B Exopeptidase Inhibitory Activity. ChemMedChem 2020; 15:2477-2490. [PMID: 32744405 DOI: 10.1002/cmdc.202000402] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [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: 06/08/2020] [Indexed: 01/02/2023]
Abstract
Nitroxoline, a well-known antimicrobial agent, has been identified in several independent studies, and on different molecular targets, as a promising candidate to be repurposed for cancer treatment. One specific target of interest concerns cathepsin B, a lysosomal peptidase involved in the degradation of the extracellular matrix (ECM), leading to tumor invasion, metastasis and angiogenesis. However, dedicated optimization of the nitroxoline core is needed to actually deliver a nitroxoline-based antitumor drug candidate. Within that context, 34 novel nitroxoline analogs were synthesized and evaluated for their relative cathepsin B inhibitory activity, their antiproliferative properties and their antimicrobial activity. More than twenty analogs were shown to exert a similar or even slightly higher cathepsin B inhibitory activity compared to nitroxoline. The implemented modifications of the nitroxoline scaffold and the resulting SAR information can form an eligible basis for further optimization toward more potent cathepsin B inhibitors in the quest for a clinical nitroxoline-based antitumor agent.
Collapse
Affiliation(s)
- Tim Van de Walle
- SynbioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Marina Briand
- SynbioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Ana Mitrović
- Department of Biotechnology, Jožef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia
| | - Izidor Sosič
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000, Ljubljana, Slovenia
| | - Stanislav Gobec
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000, Ljubljana, Slovenia
| | - Janko Kos
- Department of Biotechnology, Jožef Stefan Institute, Jamova 39, 1000, Ljubljana, Slovenia.,Department of Pharmaceutical Biology, Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000, Ljubljana, Slovenia
| | - Leentje Persoons
- Rega Institute for Medical Research, Department of Microbiology, Immunology and Transplantation, KU Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - Dirk Daelemans
- Rega Institute for Medical Research, Department of Microbiology, Immunology and Transplantation, KU Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - Steven De Jonghe
- Rega Institute for Medical Research, Department of Microbiology, Immunology and Transplantation, KU Leuven, Herestraat 49, 3000, Leuven, Belgium
| | - Zorica Ubiparip
- Centre for Synthetic Biology (CSB), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Tom Desmet
- Centre for Synthetic Biology (CSB), Department of Biotechnology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Kristof Van Hecke
- Xstruct, Department of Chemistry, Faculty of Sciences, Ghent University, Krijgslaan 281-S3, 9000, Ghent, Belgium
| | - Sven Mangelinckx
- SynbioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Matthias D'hooghe
- SynbioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| |
Collapse
|
10
|
Van de Walle T, Boone M, Van Puyvelde J, Combrinck J, Smith PJ, Chibale K, Mangelinckx S, D'hooghe M. Synthesis and biological evaluation of novel quinoline-piperidine scaffolds as antiplasmodium agents. Eur J Med Chem 2020; 198:112330. [PMID: 32408064 PMCID: PMC7294232 DOI: 10.1016/j.ejmech.2020.112330] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 04/10/2020] [Accepted: 04/10/2020] [Indexed: 01/09/2023]
Abstract
The parasitic disease malaria places almost half of the world's population at risk of infection and is responsible for more than 400,000 deaths each year. The first-line treatment, artemisinin combination therapies (ACT) regimen, is under threat due to emerging resistance of Plasmodium falciparum strains in e.g. the Mekong delta. Therefore, the development of new antimalarial agents is crucial in order to circumvent the growing resistance. Chloroquine, the long-established antimalarial drug, still serves as model compound for the design of new quinoline analogues, resulting in numerous new active derivatives against chloroquine-resistant P. falciparum strains over the past twenty years. In this work, a set of functionalized quinoline analogues, decorated with a modified piperidine-containing side chain, was synthesized. Both amino- and (aminomethyl)quinolines were prepared, resulting in a total of 18 novel quinoline-piperidine conjugates representing four different chemical series. Evaluation of their in vitro antiplasmodium activity against a CQ-sensitive (NF54) and a CQ-resistant (K1) strain of P. falciparum unveiled highly potent activities in the nanomolar range against both strains for five 4-aminoquinoline derivatives. Moreover, no cytotoxicity was observed for all active compounds at the maximum concentration tested. These five new aminoquinoline hit structures are therefore of considerable value for antimalarial research and have the potency to be transformed into novel antimalarial agents upon further hit-to-lead optimization studies.
Collapse
Affiliation(s)
- Tim Van de Walle
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Maya Boone
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Julie Van Puyvelde
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Jill Combrinck
- Division of Clinical Pharmacology, Department of Medicine, Medical School, University of Cape Town, K45, OMB, Groote Schuur Hospital, Observatory, 7925, South Africa; Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, South Africa
| | - Peter J Smith
- Division of Clinical Pharmacology, Department of Medicine, Medical School, University of Cape Town, K45, OMB, Groote Schuur Hospital, Observatory, 7925, South Africa
| | - Kelly Chibale
- South African Medical Research Council Drug Discovery and Development Research Unit, Department of Chemistry and Institute of Infectious Disease & Molecular Medicine, University of Cape Town, Rondebosch, 7701, South Africa
| | - Sven Mangelinckx
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium.
| |
Collapse
|
11
|
Decuyper L, Kaur G, Versyck C, Blondeel E, Depetter Y, Van Hecke K, D'hooghe M. Expedient Synthesis of Lupulones and Their Derivatization to 2,8-7 H-Dihydrochromen-7-ones. ChemistryOpen 2020; 9:442-444. [PMID: 32269899 PMCID: PMC7136647 DOI: 10.1002/open.202000008] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 03/10/2020] [Indexed: 11/07/2022] Open
Abstract
A convenient and improved method for the synthesis of beta acids or lupulones, which are known to possess e. g. anti-cancer, anti-inflammatory, anti-oxidative and antimicrobial activity, has been developed successfully. Further derivatization of these complex structures to the corresponding dihydrochromen-7-ones, including the natural product machuone, was realized to simplify their analysis and to confirm their molecular structure. In addition to practical and safe laboratory procedures, the advantages associated with this new approach involve the use of water as a solvent and the direct crystallization of lupunones from acetonitrile, rendering our strategy more efficient and benign as compared to available methods.
Collapse
Affiliation(s)
- Lena Decuyper
- Department of Green Chemistry and TechnologyFaculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000GhentBelgium
| | - Gurkirat Kaur
- Department of Green Chemistry and TechnologyFaculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000GhentBelgium
| | - Charlotte Versyck
- Department of Green Chemistry and TechnologyFaculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000GhentBelgium
| | - Eline Blondeel
- Department of Green Chemistry and TechnologyFaculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000GhentBelgium
| | - Yves Depetter
- Department of Green Chemistry and TechnologyFaculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000GhentBelgium
| | - Kristof Van Hecke
- Department of ChemistryFaculty of SciencesGhent UniversityKrijgslaan 281-S39000GhentBelgium
| | - Matthias D'hooghe
- Department of Green Chemistry and TechnologyFaculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000GhentBelgium
| |
Collapse
|
12
|
Decuyper L, Jukič M, Sosič I, Amoroso AM, Verlaine O, Joris B, Gobec S, D'hooghe M. Synthesis and Penicillin-binding Protein Inhibitory Assessment of Dipeptidic 4-Phenyl-β-lactams from α-Amino Acid-derived Imines. Chem Asian J 2020; 15:51-55. [PMID: 31686429 DOI: 10.1002/asia.201901470] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 10/31/2019] [Indexed: 11/11/2022]
Abstract
Monocyclic β-lactams revive the research field on antibiotics, which are threatened by the emergence of resistant bacteria. A six-step synthetic route was developed, providing easy access to new 3-amino-1-carboxymethyl-4-phenyl-β-lactams, of which the penicillin-binding protein (PBP) inhibitory potency was demonstrated biochemically.
Collapse
Affiliation(s)
- Lena Decuyper
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Marko Jukič
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000, Ljubljana, Slovenia
| | - Izidor Sosič
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000, Ljubljana, Slovenia
| | - Ana Maria Amoroso
- Centre for Protein Engineering, Faculty of Sciences, University of Liège, Quartier Agora, Allée du 6 Août 13, Bât B6a, 4000, Liège Sart-Tilman, Belgium
| | - Olivier Verlaine
- Centre for Protein Engineering, Faculty of Sciences, University of Liège, Quartier Agora, Allée du 6 Août 13, Bât B6a, 4000, Liège Sart-Tilman, Belgium
| | - Bernard Joris
- Centre for Protein Engineering, Faculty of Sciences, University of Liège, Quartier Agora, Allée du 6 Août 13, Bât B6a, 4000, Liège Sart-Tilman, Belgium
| | - Stanislav Gobec
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000, Ljubljana, Slovenia
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| |
Collapse
|
13
|
Minić A, Van de Walle T, Van Hecke K, Combrinck J, Smith PJ, Chibale K, D'hooghe M. Design and synthesis of novel ferrocene-quinoline conjugates and evaluation of their electrochemical and antiplasmodium properties. Eur J Med Chem 2019; 187:111963. [PMID: 31865015 DOI: 10.1016/j.ejmech.2019.111963] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [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: 09/16/2019] [Revised: 11/26/2019] [Accepted: 12/10/2019] [Indexed: 02/06/2023]
Abstract
The tropical disease malaria is responsible for more than 400,000 deaths annually, especially in Southeast Asia and Africa. Although the number of malaria cases is declining, there still is an urgent need for novel antimalarial agents. The emergence of hybrid antimalarial agents and the precedence set by the antimalarial drug ferroquine (FQ) prompted us to design new ferrocene-containing quinoline structures. Herein, we report the efficient synthesis of three different series of ferrocene-quinoline conjugates and a class of ferrocene-containing heterotricycles in good to high yields. For all twenty novel ferrocenyl derivatives, electrochemical properties were investigated using cyclic voltammetry and antiplasmodium evaluation against a chloroquine-susceptible NF54 strain of the human malaria parasite Plasmodium falciparum was conducted, pointing to three compounds showing submicromolar potency. Subsequently, cytotoxicity assays against a Chinese Hamster Ovarian cell line and evaluation against a chloroquine-resistant strain of Plasmodium falciparum for these three compounds revealed selective and promising antiplasmodium activity.
Collapse
Affiliation(s)
- Aleksandra Minić
- Faculty of Technical Sciences, University of Priština, Knjaza Miloša 7, 38220, Kosovska Mitrovica, Serbia; SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium.
| | - Tim Van de Walle
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Kristof Van Hecke
- XStruct, Department of Chemistry, Faculty of Sciences, Ghent University, Krijgslaan 281, S3, B-9000, Ghent, Belgium
| | - Jill Combrinck
- Medical School, University of Cape Town, K45, OMB, Groote Schuur Hopsital, Obervatory, 7925, South Africa; Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Disease and Molecular Medicine, South Africa
| | - Peter J Smith
- Medical School, University of Cape Town, K45, OMB, Groote Schuur Hopsital, Obervatory, 7925, South Africa
| | - Kelly Chibale
- South African Medical Research Council Drug Discovery and Development Research Unit, Department of Chemistry and Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Rondebosch, 7701, South Africa
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium.
| |
Collapse
|
14
|
Decuyper L, Magdalenić K, Verstraete M, Jukič M, Sosič I, Sauvage E, Amoroso AM, Verlaine O, Joris B, Gobec S, D'hooghe M. α-Unsaturated 3-Amino-1-carboxymethyl-β-lactams as Bacterial PBP Inhibitors: Synthesis and Biochemical Assessment. Chemistry 2019; 25:16128-16140. [PMID: 31596974 DOI: 10.1002/chem.201904139] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 10/08/2019] [Indexed: 01/24/2023]
Abstract
Innovative monocyclic β-lactam entities create opportunities in the battle against resistant bacteria because of their PBP acylation potential, intrinsically high β-lactamase stability and compact scaffold. α-Benzylidene-substituted 3-amino-1-carboxymethyl-β-lactams were recently shown to be potent PBP inhibitors and constitute eligible anchor points for synthetic elaboration of the chemical space around the central β-lactam ring. The present study discloses a 12-step synthesis of ten α-arylmethylidenecarboxylates using a microwave-assisted Wittig olefination as the crucial reaction step. The library was designed aiming at enhanced β-lactam electrophilicity and extended electron flow after enzymatic attack. Additionally, increased β-lactamase stability and intermolecular target interaction were envisioned by tackling both the substitution pattern of the aromatic ring and the β-lactam C4-position. The significance of α-unsaturation was validated and the R39/PBP3 inhibitory potency shown to be augmented the most through decoration of the aromatic ring with electron-withdrawing groups. Furthermore, ring cleavage by representative β-lactamases was ruled out, providing new insights in the SAR landscape of monocyclic β-lactams as eligible PBP or β-lactamase inhibitors.
Collapse
Affiliation(s)
- Lena Decuyper
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Katarina Magdalenić
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Marie Verstraete
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Marko Jukič
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000, Ljubljana, Slovenia
| | - Izidor Sosič
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000, Ljubljana, Slovenia
| | - Eric Sauvage
- Centre for Protein Engineering, Faculty of Sciences, University of Liège, Quartier Agora, Allée du 6 Août 13, Bât B6a, 4000, Liège Sart-Tilman, Belgium
| | - Ana Maria Amoroso
- Centre for Protein Engineering, Faculty of Sciences, University of Liège, Quartier Agora, Allée du 6 Août 13, Bât B6a, 4000, Liège Sart-Tilman, Belgium
| | - Olivier Verlaine
- Centre for Protein Engineering, Faculty of Sciences, University of Liège, Quartier Agora, Allée du 6 Août 13, Bât B6a, 4000, Liège Sart-Tilman, Belgium
| | - Bernard Joris
- Centre for Protein Engineering, Faculty of Sciences, University of Liège, Quartier Agora, Allée du 6 Août 13, Bât B6a, 4000, Liège Sart-Tilman, Belgium
| | - Stanislav Gobec
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000, Ljubljana, Slovenia
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| |
Collapse
|
15
|
Depetter Y, Geurs S, Franceus J, Knez D, Desmet T, De Bosscher K, De Wever O, Gobec S, D'hooghe M. Synthesis of Indoline‐Based Benzhydroxamic Acids as Potential HDAC6 Inhibitors. ChemistrySelect 2019. [DOI: 10.1002/slct.201902042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yves Depetter
- SynBioC Research GroupDepartment of Green Chemistry and TechnologyFaculty of Bioscience EngineeringGhent University Coupure Links 653 B-9000 Ghent Belgium
| | - Silke Geurs
- SynBioC Research GroupDepartment of Green Chemistry and TechnologyFaculty of Bioscience EngineeringGhent University Coupure Links 653 B-9000 Ghent Belgium
| | - Jorick Franceus
- Centre for Synthetic Biology (CSB)Department of BiotechnologyFaculty of Bioscience EngineeringGhent University Coupure Links 653 B-9000 Ghent Belgium
| | - Damijan Knez
- Department of Pharmaceutical ChemistryFaculty of PharmacyUniversity of Ljubljana Aškerčeva 7 1000 Ljubljana Slovenia
| | - Tom Desmet
- Centre for Synthetic Biology (CSB)Department of BiotechnologyFaculty of Bioscience EngineeringGhent University Coupure Links 653 B-9000 Ghent Belgium
| | - Karolien De Bosscher
- Translational Nuclear Receptor Research labVIB Department of Medical Protein ResearchDepartment of Biomolecular MedicineGhent University Albert Baertsoenkaai 3 B-9000 Ghent Belgium
| | - Olivier De Wever
- Laboratory of Experimental Cancer ResearchDepartment of Human Structure and RepairGhent University Corneel Heymanslaan 10 B-9000 Ghent Belgium
| | - Stanislav Gobec
- Department of Pharmaceutical ChemistryFaculty of PharmacyUniversity of Ljubljana Aškerčeva 7 1000 Ljubljana Slovenia
| | - Matthias D'hooghe
- SynBioC Research GroupDepartment of Green Chemistry and TechnologyFaculty of Bioscience EngineeringGhent University Coupure Links 653 B-9000 Ghent Belgium
| |
Collapse
|
16
|
Theppawong A, Van de Walle T, Van Hecke K, Grootaert C, Van Camp J, D'hooghe M. Synthesis of 1,4-Thiazepane-Based Curcuminoids with Promising Anticancer Activity. Chemistry 2019; 25:12583-12600. [PMID: 31283064 DOI: 10.1002/chem.201902549] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 06/04/2019] [Revised: 07/04/2019] [Indexed: 12/24/2022]
Abstract
Curcumin, the main component of turmeric (Curcuma longa) is known to display an interesting bioactivity profile, including pronounced anticancer properties. However, its low bioavailability, metabolic instability and nonspecific activity are concerns that have to be addressed before curcuminoids can be considered for therapeutic applications. Within that framework, intensive research has been carried out in the last decades to develop new curcumin derivatives, generally centered on standard modifications of the sp2 curcumin framework, with the aim to augment its bioavailability while maintaining or improving its anticancer properties. To find potential hit molecules by moving away from the classical flat curcumin framework, we investigated an unexplored modification to produce novel, out-of-plane 1,4-thiazepane-based curcuminoids and assessed the impact of this modification on the biological activity. In this way, 21 new, structurally diverse thiazepane scaffolds (4-aryl-1-(7-aryl-1,4-thiazepan-5-ylidene)but-3-en-2-ones) were synthesized, as well as some biologically interesting unexpected reaction products (such as 5-aryl-6-arylmethylene-3-ethoxycyclohex-2-en-1-ones and 4-acetyl-5-aryl-2-(3-arylacryloyl)-3-methylcyclohex-2-en-1-ones). All these analogues were subsequently tested on their antioxidant capacity, their cytotoxicity properties and their ROS (reactive oxygen species) production. Many compounds demonstrated interesting activities, with ten curcuminoids, whereof eight 1,4-thiazepane-based, showing better antiproliferative properties compared to their mother compounds, as well as an increased ROS production. This unprecedented 3D curcumin modification has thus delivered promising new hit compounds with good activity profiles eligible for further exploration.
Collapse
Affiliation(s)
- Atiruj Theppawong
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Tim Van de Walle
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Kristof Van Hecke
- XStruct, Department of Chemistry, Faculty of Sciences, Ghent University, Krijgslaan 281, S3, 9000, Ghent, Belgium
| | - Charlotte Grootaert
- nutriFOODchem, Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - John Van Camp
- nutriFOODchem, Department of Food Technology, Safety and Health, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| |
Collapse
|
17
|
Van Kerrebroeck R, Naert P, Heugebaert TSA, D'hooghe M, Stevens CV. Electrophilic Bromination in Flow: A Safe and Sustainable Alternative to the Use of Molecular Bromine in Batch. Molecules 2019; 24:E2116. [PMID: 31167456 PMCID: PMC6600453 DOI: 10.3390/molecules24112116] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2019] [Revised: 05/30/2019] [Accepted: 06/01/2019] [Indexed: 11/26/2022] Open
Abstract
Bromination reactions are crucial in today's chemical industry since the versatility of the formed organobromides makes them suitable building blocks for numerous syntheses. However, the use of the toxic and highly reactive molecular bromine (Br2) makes these brominations very challenging and hazardous. We describe here a safe and straightforward protocol for bromination in continuous flow. The hazardous Br2 or KOBr is generated in situ by reacting an oxidant (NaOCl) with HBr or KBr, respectively, which is directly coupled to the bromination reaction and a quench of residual bromine. This protocol was demonstrated by polybrominating both alkenes and aromatic substrates in a wide variety of solvents, with yields ranging from 78% to 99%. The protocol can easily be adapted for the bromination of other substrates in an academic and industrial environment.
Collapse
Affiliation(s)
- Reinout Van Kerrebroeck
- SynBioC research Group, Department of Green Chemistry and Technology, Ghent University, Coupure Links 653, 9000 Ghent, Belgium.
| | - Pieter Naert
- SynBioC research Group, Department of Green Chemistry and Technology, Ghent University, Coupure Links 653, 9000 Ghent, Belgium.
| | - Thomas S A Heugebaert
- SynBioC research Group, Department of Green Chemistry and Technology, Ghent University, Coupure Links 653, 9000 Ghent, Belgium.
| | - Matthias D'hooghe
- SynBioC research Group, Department of Green Chemistry and Technology, Ghent University, Coupure Links 653, 9000 Ghent, Belgium.
| | - Christian V Stevens
- SynBioC research Group, Department of Green Chemistry and Technology, Ghent University, Coupure Links 653, 9000 Ghent, Belgium.
| |
Collapse
|
18
|
Depetter Y, Geurs S, De Vreese R, Goethals S, Vandoorn E, Laevens A, Steenbrugge J, Meyer E, de Tullio P, Bracke M, D'hooghe M, De Wever O. Selective pharmacological inhibitors of HDAC6 reveal biochemical activity but functional tolerance in cancer models. Int J Cancer 2019; 145:735-747. [DOI: 10.1002/ijc.32169] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 12/14/2018] [Accepted: 01/22/2019] [Indexed: 02/03/2023]
Affiliation(s)
- Yves Depetter
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Ghent Belgium
- Laboratory of Experimental Cancer Research, Department of Human Structure and Repair, Faculty of Medicine and Health Sciences; Ghent University; Ghent Belgium
- Cancer Research Institute Ghent (CRIG); Ghent Belgium
| | - Silke Geurs
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Ghent Belgium
| | - Rob De Vreese
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Ghent Belgium
| | - Sophie Goethals
- Laboratory of Experimental Cancer Research, Department of Human Structure and Repair, Faculty of Medicine and Health Sciences; Ghent University; Ghent Belgium
| | - Elien Vandoorn
- Laboratory of Experimental Cancer Research, Department of Human Structure and Repair, Faculty of Medicine and Health Sciences; Ghent University; Ghent Belgium
| | - Alien Laevens
- Laboratory of Experimental Cancer Research, Department of Human Structure and Repair, Faculty of Medicine and Health Sciences; Ghent University; Ghent Belgium
| | - Jonas Steenbrugge
- Laboratory of Biochemistry, Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - Evelyne Meyer
- Cancer Research Institute Ghent (CRIG); Ghent Belgium
- Laboratory of Biochemistry, Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine; Ghent University; Merelbeke Belgium
| | - Pascal de Tullio
- Center for Interdisciplinary Research on Medicines (CIRM), Metabolomics Group; Université de Liège; Liège Belgium
| | - Marc Bracke
- Laboratory of Experimental Cancer Research, Department of Human Structure and Repair, Faculty of Medicine and Health Sciences; Ghent University; Ghent Belgium
- Cancer Research Institute Ghent (CRIG); Ghent Belgium
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Ghent Belgium
| | - Olivier De Wever
- Laboratory of Experimental Cancer Research, Department of Human Structure and Repair, Faculty of Medicine and Health Sciences; Ghent University; Ghent Belgium
- Cancer Research Institute Ghent (CRIG); Ghent Belgium
| |
Collapse
|
19
|
Boydas EB, Tanriver G, D'hooghe M, Ha HJ, Van Speybroeck V, Catak S. Theoretical insight into the regioselective ring-expansions of bicyclic aziridinium ions. Org Biomol Chem 2019; 16:796-806. [PMID: 29323389 DOI: 10.1039/c7ob02253k] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Transient bicyclic aziridinium ions are known to undergo ring-expansion reactions, paving the way to functionalized nitrogen-containing heterocycles. In this study, the regioselectivity observed in the ring-expansion reactions of 1-azoniabicyclo[n.1.0]alkanes was investigated from a computational viewpoint to study the ring-expansion pathways of two bicyclic systems with different ring sizes. Moreover, several nucleophiles leading to different experimental results were investigated. The effect of solvation was taken into account using both explicit and implicit solvent models. This theoretical rationalization provides valuable insight into the observed regioselectivity and may be used as a predictive tool in future studies.
Collapse
Affiliation(s)
- Esma B Boydas
- Bogazici University, Department of Chemistry, Bebek, 34342 Istanbul, Turkey.
| | | | | | | | | | | |
Collapse
|
20
|
Theppawong A, Van de Walle T, Grootaert C, Van Hecke K, Catry N, Desmet T, Van Camp J, D'hooghe M. Synthesis of Non-Symmetrical Nitrogen-Containing Curcuminoids in the Pursuit of New Anticancer Candidates. ChemistryOpen 2019; 8:236-247. [PMID: 30847262 PMCID: PMC6392825 DOI: 10.1002/open.201800287] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 12/13/2018] [Revised: 02/05/2019] [Indexed: 01/03/2023] Open
Abstract
Curcumin is known to display pronounced anticancer effects and a variety of other biological activities. However, the low bioavailability and fast metabolism of this molecule present an issue of concern with respect to its medicinal applications. To address this issue, structural modifications of the curcumin scaffold can be envisioned as a strategy to improve both the solubility and stability of this chemical entity, without compromising its biological activities. Previous work in our group targeted the synthesis of symmetrical azaheteroaromatic curcuminoids, which showed better solubility and cytotoxicity profiles compared to curcumin. In continuation of that work, we now focused on the synthesis of non-symmetrical nitrogen-containing curcuminoids bearing both a phenolic and an azaheteroaromatic moiety. In that way, we aimed to combine good solubility, antioxidant potential and cytotoxic properties into one molecule. Some derivatives were selected for further chemical modification of their rather labile β-diketone scaffold to the corresponding pyrazole moiety. In this way, thirteen new non-symmetrical aza-aromatic curcuminoids and four pyrazole-based analogues were successfully synthesized in a yield of 11-69 %. All newly synthesized analogues were evaluated for their antioxidant properties, reactive oxygen species (ROS) production, water solubility and anticancer activities. Several novel derivatives displayed good cytotoxicity profiles compared to curcumin, in combination with an improved water solubility and stability, and were thus identified as potential hit scaffolds for further optimization studies.
Collapse
Affiliation(s)
- Atiruj Theppawong
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience EngineeringGhent UniversityCoupure Links 653B-9000GhentBelgium
| | - Tim Van de Walle
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience EngineeringGhent UniversityCoupure Links 653B-9000GhentBelgium
| | - Charlotte Grootaert
- Department of Food Technology, Safety and Health, Faculty of Bioscience EngineeringGhent UniversityCoupure Links 653B-9000GhentBelgium
| | - Kristof Van Hecke
- XStruct, Department of Chemistry, Faculty of ScienceGhent UniversityKrijgslaan 281, S3B-9000GhentBelgium
| | - Nathalie Catry
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience EngineeringGhent UniversityCoupure Links 653B-9000GhentBelgium
| | - Tom Desmet
- Department of Biotechnology, Faculty of Bioscience EngineeringGhent University Coupure Links 653, 9000GhentBelgium
| | - John Van Camp
- Department of Food Technology, Safety and Health, Faculty of Bioscience EngineeringGhent UniversityCoupure Links 653B-9000GhentBelgium
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience EngineeringGhent UniversityCoupure Links 653B-9000GhentBelgium
| |
Collapse
|
21
|
Decuyper L, Deketelaere S, Vanparys L, Jukič M, Sosič I, Sauvage E, Amoroso AM, Verlaine O, Joris B, Gobec S, D'hooghe M. In Silico Design and Enantioselective Synthesis of Functionalized Monocyclic 3-Amino-1-carboxymethyl-β-lactams as Inhibitors of Penicillin-Binding Proteins of Resistant Bacteria. Chemistry 2018; 24:15254-15266. [PMID: 29882610 DOI: 10.1002/chem.201801868] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 06/07/2018] [Indexed: 01/20/2023]
Abstract
As a complement to the renowned bicyclic β-lactam antibiotics, monocyclic analogues provide a breath of fresh air in the battle against resistant bacteria. In that framework, the present study discloses the in silico design and unprecedented ten-step synthesis of eleven nocardicin-like enantiomerically pure 2-{3-[2-(2-aminothiazol-4-yl)-2-(methoxyimino)acetamido]-2-oxoazetidin-1-yl}acetic acids starting from serine as a readily accessible precursor. The capability of this novel class of monocyclic 3-amino-β-lactams to inhibit penicillin-binding proteins (PBPs) of various (resistant) bacteria was assessed, revealing the potential of α-benzylidenecarboxylates as interesting leads in the pursuit of novel PBP inhibitors. No deactivation by representative enzymes belonging to the four β-lactamase classes was observed, while weak inhibition of class C β-lactamase P99 was demonstrated.
Collapse
Affiliation(s)
- Lena Decuyper
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Sari Deketelaere
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Lore Vanparys
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Marko Jukič
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000, Ljubljana, Slovenia
| | - Izidor Sosič
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000, Ljubljana, Slovenia
| | - Eric Sauvage
- Center for Protein Engineering, Faculty of Sciences, University of Liège, Quartier Agora, Allée du 6 Août 13, Bât B6a, 4000, Liège-Sart Tilman, Belgium
| | - Ana Maria Amoroso
- Center for Protein Engineering, Faculty of Sciences, University of Liège, Quartier Agora, Allée du 6 Août 13, Bât B6a, 4000, Liège-Sart Tilman, Belgium
| | - Olivier Verlaine
- Center for Protein Engineering, Faculty of Sciences, University of Liège, Quartier Agora, Allée du 6 Août 13, Bât B6a, 4000, Liège-Sart Tilman, Belgium
| | - Bernard Joris
- Center for Protein Engineering, Faculty of Sciences, University of Liège, Quartier Agora, Allée du 6 Août 13, Bât B6a, 4000, Liège-Sart Tilman, Belgium
| | - Stanislav Gobec
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, University of Ljubljana, Aškerčeva 7, 1000, Ljubljana, Slovenia
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Green Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| |
Collapse
|
22
|
Depetter Y, Geurs S, Vanden Bussche F, De Vreese R, Franceus J, Desmet T, De Wever O, D'hooghe M. Assessment of the trifluoromethyl ketone functionality as an alternative zinc-binding group for selective HDAC6 inhibition. Medchemcomm 2018; 9:1011-1016. [PMID: 30108990 PMCID: PMC6072519 DOI: 10.1039/c8md00107c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 05/04/2018] [Indexed: 01/23/2023]
Abstract
Recent studies point towards the possible disadvantages of using hydroxamic acid-based zinc-binding groups in HDAC inhibitors due to e.g. mutagenicity issues. In this work, we elaborated on our previously developed Tubathian series, a class of highly selective thiaheterocyclic HDAC6 inhibitors, by replacing the benzohydroxamic acid function by an alternative zinc chelator, i.e., an aromatic trifluoromethyl ketone. Unfortunately, these compounds showed a reduced potency to inhibit HDAC6 as compared to their hydroxamic acid counterparts. In agreement, the most active trifluoromethyl ketone was unable to influence the growth of SK-OV-3 ovarian cancer cells nor to alter the acetylation status of tubulin and histone H3. These data suggest that replacement of the zinc-binding hydroxamic acid function with a trifluoromethyl ketone zinc-binding moiety within reported benzohydroxamic HDAC6 inhibitors should not be considered as a standard strategy in HDAC inhibitor development.
Collapse
Affiliation(s)
- Yves Depetter
- SynBioC Research Group , Department of Green Chemistry and Technology , Faculty of Bioscience Engineering , Ghent University , Coupure Links 653 , B-9000 Ghent , Belgium .
- Laboratory of Experimental Cancer Research , Department of Radiation Oncology and Experimental Cancer Research , Ghent University , Corneel Heymanslaan 10 , B-9000 Ghent , Belgium
- Cancer Research Institute Ghent (CRIG) , Ghent , Belgium
| | - Silke Geurs
- SynBioC Research Group , Department of Green Chemistry and Technology , Faculty of Bioscience Engineering , Ghent University , Coupure Links 653 , B-9000 Ghent , Belgium .
| | - Flore Vanden Bussche
- SynBioC Research Group , Department of Green Chemistry and Technology , Faculty of Bioscience Engineering , Ghent University , Coupure Links 653 , B-9000 Ghent , Belgium .
| | - Rob De Vreese
- SynBioC Research Group , Department of Green Chemistry and Technology , Faculty of Bioscience Engineering , Ghent University , Coupure Links 653 , B-9000 Ghent , Belgium .
| | - Jorick Franceus
- Centre for Synthetic Biology (CSB) , Department of Biotechnology , Faculty of Bioscience Engineering , Ghent University , Coupure Links 653 , B-9000 Ghent , Belgium
| | - Tom Desmet
- Centre for Synthetic Biology (CSB) , Department of Biotechnology , Faculty of Bioscience Engineering , Ghent University , Coupure Links 653 , B-9000 Ghent , Belgium
| | - Olivier De Wever
- Laboratory of Experimental Cancer Research , Department of Radiation Oncology and Experimental Cancer Research , Ghent University , Corneel Heymanslaan 10 , B-9000 Ghent , Belgium
- Cancer Research Institute Ghent (CRIG) , Ghent , Belgium
| | - Matthias D'hooghe
- SynBioC Research Group , Department of Green Chemistry and Technology , Faculty of Bioscience Engineering , Ghent University , Coupure Links 653 , B-9000 Ghent , Belgium .
| |
Collapse
|
23
|
Theppawong A, Van de Walle T, Grootaert C, Bultinck M, Desmet T, Van Camp J, D'hooghe M. Synthesis of Novel Aza-aromatic Curcuminoids with Improved Biological Activities towards Various Cancer Cell Lines. ChemistryOpen 2018; 7:381-392. [PMID: 29872613 PMCID: PMC5974556 DOI: 10.1002/open.201800029] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [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: 02/27/2018] [Indexed: 01/01/2023] Open
Abstract
Curcumin, a natural compound extracted from the rhizomes of Curcuma longa, displays pronounced anticancer properties but lacks good bioavailability and stability. In a previous study, we initiated structure modification of the curcumin scaffold by imination of the labile β-diketone moiety to produce novel β-enaminone derivatives. These compounds showed promising properties for elaborate follow-up studies. In this work, we focused on another class of nitrogen-containing curcuminoids with a similar objective: to address the bioavailability and stability issues and to improve the biological activity of curcumin. This paper thus reports on the synthesis of new pyridine-, indole-, and pyrrole-based curcumin analogues (aza-aromatic curcuminoids) and discusses their water solubility, antioxidant activity, and antiproliferative properties. In addition, multivariate statistics, including hierarchical clustering analysis and principal component analysis, were performed on a broad set of nitrogen-containing curcuminoids. Compared to their respective mother structures, that is, curcumin and bisdemethoxycurcumin, all compounds, and especially the pyridin-3-yl β-enaminone analogues, showed better water solubility profiles. Interestingly, the pyridine-, indole-, and pyrrole-based curcumin derivatives demonstrated improved biological effects in terms of mitochondrial activity impairment and protein content, in addition to comparable or decreased antioxidant properties. Overall, the biologically active N-alkyl β-enaminone aza-aromatic curcuminoids were shown to offer a desirable balance between good solubility and significant bioactivity.
Collapse
Affiliation(s)
- Atiruj Theppawong
- SynBioC Research GroupDepartment of Green Chemistry and TechnologyFaculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000GhentBelgium
| | - Tim Van de Walle
- SynBioC Research GroupDepartment of Green Chemistry and TechnologyFaculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000GhentBelgium
| | - Charlotte Grootaert
- Department of Food Technology, Safety and HealthFaculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000GhentBelgium
| | - Margot Bultinck
- SynBioC Research GroupDepartment of Green Chemistry and TechnologyFaculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000GhentBelgium
| | - Tom Desmet
- Department of BiotechnologyFaculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000GhentBelgium
| | - John Van Camp
- Department of Food Technology, Safety and HealthFaculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000GhentBelgium
| | - Matthias D'hooghe
- SynBioC Research GroupDepartment of Green Chemistry and TechnologyFaculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000GhentBelgium
| |
Collapse
|
24
|
Dao Thi H, Goossens H, Hertsen D, Otte V, Van Nguyen T, Van Speybroeck V, D'hooghe M. Formation of Fluorinated Amido Esters through Unexpected C3-C4 Bond Fission in 4-Trifluoromethyl-3-oxo-β-lactams. Chem Asian J 2018; 13:421-431. [PMID: 29316332 DOI: 10.1002/asia.201701636] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 11/22/2017] [Revised: 01/08/2018] [Indexed: 11/07/2022]
Abstract
4-Trifluoromethyl-3-oxo-β-lactams were unexpectedly transformed into 2-[(2,2-difluorovinyl)amino]-2-oxoacetates as major products, accompanied by minor amounts of 2-oxo-2-[(2,2,2-trifluoroethyl)amino]acetates, upon treatment with alkyl halides and triethylamine in DMSO. This peculiar C3-C4 bond fission reactivity was investigated in-depth, from both an experimental and a computational point of view, in order to shed light on the underlying reaction mechanism.
Collapse
Affiliation(s)
- Hang Dao Thi
- SynBioC Research Group, Department of Green Chemistry and Technology Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet, CauGiay, Hanoi, Vietnam
| | - Hannelore Goossens
- Center for Molecular Modeling, Ghent University, Technologiepark 903, 9052, Zwijnaarde, Belgium
| | - Dietmar Hertsen
- Center for Molecular Modeling, Ghent University, Technologiepark 903, 9052, Zwijnaarde, Belgium
| | - Valerie Otte
- SynBioC Research Group, Department of Green Chemistry and Technology Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
- Center for Molecular Modeling, Ghent University, Technologiepark 903, 9052, Zwijnaarde, Belgium
| | - Tuyen Van Nguyen
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet, CauGiay, Hanoi, Vietnam
| | | | - Matthias D'hooghe
- SynBioC Research Group, Department of Green Chemistry and Technology Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| |
Collapse
|
25
|
Piens N, Goossens H, Hertsen D, Deketelaere S, Crul L, Demeurisse L, De Moor J, Van den Broeck E, Mollet K, Van Hecke K, Van Speybroeck V, D'hooghe M. Reactivity of 3-Oxo-β-lactams with Respect to Primary Amines-An Experimental and Computational Approach. Chemistry 2017; 23:18002-18009. [DOI: 10.1002/chem.201703852] [Citation(s) in RCA: 5] [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] [Received: 08/16/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Nicola Piens
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| | - Hannelore Goossens
- Center for Molecular Modeling; Ghent University; Technologiepark 903 9052 Zwijnaarde Belgium
| | - Dietmar Hertsen
- Center for Molecular Modeling; Ghent University; Technologiepark 903 9052 Zwijnaarde Belgium
| | - Sari Deketelaere
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| | - Lieselotte Crul
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| | - Lotte Demeurisse
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| | - Jelle De Moor
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
- Center for Molecular Modeling; Ghent University; Technologiepark 903 9052 Zwijnaarde Belgium
| | - Elias Van den Broeck
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
- Center for Molecular Modeling; Ghent University; Technologiepark 903 9052 Zwijnaarde Belgium
| | - Karen Mollet
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| | - Kristof Van Hecke
- XStruct; Department of Chemistry; Faculty of Sciences; Ghent University; Krijgslaan 281-S3 9000 Ghent Belgium
| | | | - Matthias D'hooghe
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| |
Collapse
|
26
|
De Vreese R, Muylaert K, Maton C, Dereu L, Taillieu F, Harth T, Van Deun R, Vrielinck H, Stevens CV, D'hooghe M. Synthesis of bis-8-hydroxyquinolines via an imination or a Suzuki-Miyaura coupling approach. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.08.039] [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]
|
27
|
Decuyper L, Jukič M, Sosič I, Žula A, D'hooghe M, Gobec S. Antibacterial and β-Lactamase Inhibitory Activity of Monocyclic β-Lactams. Med Res Rev 2017; 38:426-503. [DOI: 10.1002/med.21443] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 01/16/2017] [Accepted: 02/08/2017] [Indexed: 01/06/2023]
Affiliation(s)
- Lena Decuyper
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Ghent Belgium
| | - Marko Jukič
- Faculty of Pharmacy; University of Ljubljana; Ljubljana Slovenia
| | - Izidor Sosič
- Faculty of Pharmacy; University of Ljubljana; Ljubljana Slovenia
| | - Aleš Žula
- Faculty of Pharmacy; University of Ljubljana; Ljubljana Slovenia
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Ghent Belgium
| | - Stanislav Gobec
- Faculty of Pharmacy; University of Ljubljana; Ljubljana Slovenia
| |
Collapse
|
28
|
Affiliation(s)
- Nicola Piens
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| | - Matthias D'hooghe
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| |
Collapse
|
29
|
Dolfen J, Van Hecke K, D'hooghe M. LiAlH4
-Induced Thia-Aza-Payne Rearrangement of Functionalized 2-(Thiocyanatomethyl)aziridines into 2-(Aminomethyl)thiiranes as an Entry to 5-(Chloromethyl)thiazolidin-2-ones. European J Org Chem 2017. [DOI: 10.1002/ejoc.201700549] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jeroen Dolfen
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| | - Kristof Van Hecke
- XStruct; Department of Inorganic and Physical Chemistry; Ghent University; Krijgslaan 281-S3 9000 Ghent Belgium
| | - Matthias D'hooghe
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| |
Collapse
|
30
|
Abstract
Due to the emerging resistance against classical β-lactam-based antibiotics, a growing number of bacterial infections has become harder to treat. This alarming tendency necessitates continued research on novel antibacterial agents. Many classes of β-lactam antibiotics are characterized by the presence of the 3-aminoazetidin-2-one core, which resembles the natural substrate of the target penicillin-binding proteins. In that respect, this Review summarizes the different synthetic pathways toward this key structure for the development of new antibacterial agents. The most extensively applied methods for 3-amino-β-lactam ring formation are discussed, in addition to a few less common strategies. Moreover, approaches to introduce the 3-amino substituent after ring formation are also covered.
Collapse
Affiliation(s)
- Sari Deketelaere
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000GhentBelgium
| | - Tuyen Van Nguyen
- Institute of ChemistryGraduate University of Science and Technology, Vietnam Academy of Science and Technology18-Hoang Quoc Viet, Cau GiayHanoiVietnam
| | - Christian V. Stevens
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000GhentBelgium
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience EngineeringGhent UniversityCoupure Links 6539000GhentBelgium
| |
Collapse
|
31
|
Piens N, Van Hecke K, Vogt D, D'hooghe M. Cobalt carbonyl-catalyzed carbonylation of functionalized aziridines to versatile β-lactam building blocks. Org Biomol Chem 2017; 15:4816-4821. [DOI: 10.1039/c7ob00832e] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aziridine to azetidin-2-one carbonylation as a convenient entry to pyrrolidines,C-fused bi- and tricyclic β-lactams and monocyclic carbapenem analogs.
Collapse
Affiliation(s)
- Nicola Piens
- SynBioC Research Group
- Department of Sustainable Organic Chemistry and Technology
- Faculty of Bioscience Engineering
- Ghent University
- B-9000 Ghent
| | - Kristof Van Hecke
- XStruct
- Department of Inorganic and Physical Chemistry
- Faculty of Sciences
- Ghent University
- B-9000 Ghent
| | - Dieter Vogt
- EaStCHEM
- School of Chemistry
- University of Edinburgh
- Edinburgh EH9 3FJ
- UK
| | - Matthias D'hooghe
- SynBioC Research Group
- Department of Sustainable Organic Chemistry and Technology
- Faculty of Bioscience Engineering
- Ghent University
- B-9000 Ghent
| |
Collapse
|
32
|
De Vreese R, Galle L, Depetter Y, Franceus J, Desmet T, Van Hecke K, Benoy V, Van Den Bosch L, D'hooghe M. Synthesis of Potent and Selective HDAC6 Inhibitors Bearing a Cyclohexane- or Cycloheptane-Annulated 1,5-Benzothiazepine Scaffold. Chemistry 2016; 23:128-136. [DOI: 10.1002/chem.201604167] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Indexed: 01/12/2023]
Affiliation(s)
- Rob De Vreese
- SynBioC Research Group; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| | - Lisa Galle
- SynBioC Research Group; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| | - Yves Depetter
- SynBioC Research Group; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| | - Jorick Franceus
- Centre for Industrial Biotechnology and Biocatalysis; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| | - Tom Desmet
- Centre for Industrial Biotechnology and Biocatalysis; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| | - Kristof Van Hecke
- XStruct, Department of Inorganic and Physical Chemistry; Faculty of Sciences; Ghent University; Krijgslaan 281-S3 9000 Ghent Belgium
| | - Veronick Benoy
- University of Leuven; Department of Neurosciences, Experimental Neurology, VIB-Vesalius Research Center, Laboratory of Neurobiology; 3000 Leuven Belgium
| | - Ludo Van Den Bosch
- University of Leuven; Department of Neurosciences, Experimental Neurology, VIB-Vesalius Research Center, Laboratory of Neurobiology; 3000 Leuven Belgium
| | - Matthias D'hooghe
- SynBioC Research Group; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| |
Collapse
|
33
|
Piens N, De Craene S, Franceus J, Mollet K, Van Hecke K, Desmet T, D'hooghe M. Diastereoselective synthesis of 3-acetoxy-4-(3-aryloxiran-2-yl)azetidin-2-ones and their transformation into 3,4-oxolane-fused bicyclic β-lactams. Org Biomol Chem 2016; 14:11279-11288. [PMID: 27853806 DOI: 10.1039/c6ob02221a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
cis-3-Acetoxy-4-(3-aryloxiran-2-yl)azetidin-2-ones were prepared through a Staudinger [2+2]-cyclocondensation between acetoxyketene and the appropriate epoxyimines in a highly diastereoselective way. Subsequent potassium carbonate-mediated acetate hydrolysis, followed by intramolecular ring closure through epoxide ring opening, afforded stereodefined 3-aryl-4-hydroxy-2-oxa-6-azabicyclo[3.2.0]heptan-7-ones as a novel class of C-fused bicyclic β-lactams. Selective benzylic oxidation of bicyclic N-(4-methoxybenzyl)-β-lactams with potassium persulfate and potassium dihydrogen phosphate provided the corresponding N-aroyl derivatives as interesting leads for further β-lactamase inhibitor development.
Collapse
Affiliation(s)
- Nicola Piens
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium.
| | - Sven De Craene
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium.
| | - Jorick Franceus
- Department of Biochemical and Microbial Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Karen Mollet
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium.
| | - Kristof Van Hecke
- XStruct, Department of Inorganic and Physical Chemistry, Faculty of Sciences, Ghent University, Krijgslaan 281-S3, B-9000 Ghent, Belgium
| | - Tom Desmet
- Department of Biochemical and Microbial Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium.
| |
Collapse
|
34
|
Dolfen J, Yadav NN, De Kimpe N, D'hooghe M, Ha HJ. Bicyclic Aziridinium Ions in Azaheterocyclic Chemistry - Preparation and Synthetic Application of 1-Azoniabicyclo[n.1.0]alkanes. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600750] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jeroen Dolfen
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 B-9000 Ghent Belgium
| | - Nagendra Nath Yadav
- Department of Chemistry; Hankuk University of Foreign Studies; Yongin 449-791 Korea
| | - Norbert De Kimpe
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 B-9000 Ghent Belgium
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 B-9000 Ghent Belgium
| | - Hyun-Joon Ha
- Department of Chemistry; Hankuk University of Foreign Studies; Yongin 449-791 Korea
| |
Collapse
|
35
|
Theppawong A, De Vreese R, Vannecke L, Grootaert C, Van Camp J, D'hooghe M. Synthesis and biological assessment of novel N-(hydroxy/methoxy)alkyl β-enaminone curcuminoids. Bioorg Med Chem Lett 2016; 26:5650-5656. [PMID: 27843113 DOI: 10.1016/j.bmcl.2016.10.068] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [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: 09/23/2016] [Revised: 10/20/2016] [Accepted: 10/23/2016] [Indexed: 10/20/2022]
Abstract
Curcumin, a natural compound extracted from the rhizomes of Curcuma Longa, is known to display pronounced anticancer activity but lacks good pharmacokinetic properties. In that respect, augmenting the water solubility by structural modification of the curcumin scaffold may result in improved bioavailability and pharmacokinetics. A possible scaffold modification, especially important for this study, concerns the imination of the labile β-diketone moiety in curcumin. Previous work revealed that novel N-alkyl β-enaminones showed a similar water solubility as compared to curcumin, accompanied by a stronger anti-proliferative activity. To extend this β-enaminone compound library, new analogues were prepared in this work using more polar amines (hydroxyalkylamines and methoxyalkylamines instead of alkylamines) with the main purpose to improve the water solubility without compromising the biological activity of the resulting curcuminoids. Compared to their respective parent compounds, i.e. curcumin and bisdemethoxycurcumin, the bisdemethoxycurcumin N-(hydroxy/methoxy)alkyl enaminone analogues showed better water solubility, antioxidant and anti-proliferative activities. In addition, the curcumin enaminones displayed activities comparable to or better than curcumin, and the water solubility was improved significantly. The constructed new analogues may thus be of interest for further exploration concerning their impact on oxidative stress related diseases such as cancer.
Collapse
Affiliation(s)
- Atiruj Theppawong
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Rob De Vreese
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Lore Vannecke
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Charlotte Grootaert
- Department of Food Safety and Food Quality, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - John Van Camp
- Department of Food Safety and Food Quality, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium.
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium.
| |
Collapse
|
36
|
Dao Thi H, Danneels B, Desmet T, Van Hecke K, Van Nguyen T, D'hooghe M. Synthesis and Applications of 3-Methylene-4-(trifluoromethyl)azetidin-2-ones as Building Blocks for the Preparation of Mono- and Spirocyclic 4-CF3-β-Lactams. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600387] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hang Dao Thi
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 B-9000 Ghent Belgium
- Institute of Chemistry; Vietnam Academy of Science and Technology; 18-Hoang Quoc Viet CauGiay Hanoi Vietnam
| | - Barbara Danneels
- Centre for Industrial Biotechnology and Biocatalysis; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 B-9000 Ghent Belgium
| | - Tom Desmet
- Centre for Industrial Biotechnology and Biocatalysis; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 B-9000 Ghent Belgium
| | - Kristof Van Hecke
- XStruct, Department of Inorganic and Physical Chemistry; Ghent University; Krijgslaan 281-S3 B-9000 Ghent Belgium
| | - Tuyen Van Nguyen
- Institute of Chemistry; Vietnam Academy of Science and Technology; 18-Hoang Quoc Viet CauGiay Hanoi Vietnam
| | - Matthias D'hooghe
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 B-9000 Ghent Belgium
| |
Collapse
|
37
|
Dolfen J, Yadav NN, De Kimpe N, D'hooghe M, Ha HJ. Front Cover Picture: Bicyclic Aziridinium Ions in Azaheterocyclic Chemistry - Preparation and Synthetic Application of 1-Azoniabicyclo[n.1.0]alkanes (Adv. Synth. Catal. 22/2016). Adv Synth Catal 2016. [DOI: 10.1002/adsc.201601081] [Citation(s) in RCA: 7] [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: 11/09/2022]
Affiliation(s)
- Jeroen Dolfen
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 B-9000 Ghent Belgium
| | - Nagendra Nath Yadav
- Department of Chemistry; Hankuk University of Foreign Studies; Yongin 449-791 Korea
| | - Norbert De Kimpe
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 B-9000 Ghent Belgium
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 B-9000 Ghent Belgium
| | - Hyun-Joon Ha
- Department of Chemistry; Hankuk University of Foreign Studies; Yongin 449-791 Korea
| |
Collapse
|
38
|
Dolfen J, Vervisch K, De Kimpe N, D'hooghe M. LiAlH4
-Induced Selective Ring Rearrangement of 2-(2-Cyanoethyl)aziridines toward 2-(Aminomethyl)pyrrolidines and 3-Aminopiperidines as Eligible Heterocyclic Building Blocks. Chemistry 2016; 22:4945-51. [DOI: 10.1002/chem.201504853] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Jeroen Dolfen
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| | - Karel Vervisch
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| | - Norbert De Kimpe
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| | - Matthias D'hooghe
- SynBioC Research Group; Department of Sustainable Organic Chemistry and Technology; Faculty of Bioscience Engineering; Ghent University; Coupure Links 653 9000 Ghent Belgium
| |
Collapse
|
39
|
Decuyper L, Piens N, Mincke J, Bomon J, De Schrijver B, Mollet K, De Winter K, Desmet T, D'hooghe M. A nitrilase-mediated entry to 4-carboxymethyl-β-lactams from chemically prepared 4-(cyanomethyl)azetidin-2-ones. RSC Adv 2016. [DOI: 10.1039/c6ra08213k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
4-(Cyanomethyl)azetidin-2-ones were efficiently prepared from 1,2:5,6-di-O-isopropylidene-d-mannitol, followed by a nitrilase-catalyzed hydrolysis to 4-carboxymethyl β-lactams without affecting the sensitive four-membered ring system.
Collapse
Affiliation(s)
- Lena Decuyper
- SynBioC Research Group
- Department of Sustainable Organic Chemistry and Technology
- Faculty of Bioscience Engineering
- Ghent University
- B-9000 Ghent
| | - Nicola Piens
- SynBioC Research Group
- Department of Sustainable Organic Chemistry and Technology
- Faculty of Bioscience Engineering
- Ghent University
- B-9000 Ghent
| | - Jens Mincke
- SynBioC Research Group
- Department of Sustainable Organic Chemistry and Technology
- Faculty of Bioscience Engineering
- Ghent University
- B-9000 Ghent
| | - Jeroen Bomon
- SynBioC Research Group
- Department of Sustainable Organic Chemistry and Technology
- Faculty of Bioscience Engineering
- Ghent University
- B-9000 Ghent
| | - Bert De Schrijver
- SynBioC Research Group
- Department of Sustainable Organic Chemistry and Technology
- Faculty of Bioscience Engineering
- Ghent University
- B-9000 Ghent
| | - Karen Mollet
- SynBioC Research Group
- Department of Sustainable Organic Chemistry and Technology
- Faculty of Bioscience Engineering
- Ghent University
- B-9000 Ghent
| | - Karel De Winter
- Department of Biochemical and Microbial Technology
- Faculty of Bioscience Engineering
- Ghent University
- B-9000 Ghent
- Belgium
| | - Tom Desmet
- Department of Biochemical and Microbial Technology
- Faculty of Bioscience Engineering
- Ghent University
- B-9000 Ghent
- Belgium
| | - Matthias D'hooghe
- SynBioC Research Group
- Department of Sustainable Organic Chemistry and Technology
- Faculty of Bioscience Engineering
- Ghent University
- B-9000 Ghent
| |
Collapse
|
40
|
Verhaeghe T, De Winter K, Berland M, De Vreese R, D'hooghe M, Offmann B, Desmet T. Converting bulk sugars into prebiotics: semi-rational design of a transglucosylase with controlled selectivity. Chem Commun (Camb) 2016; 52:3687-9. [DOI: 10.1039/c5cc09940d] [Citation(s) in RCA: 30] [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: 12/16/2022]
Abstract
Bad sugars in, good sugar out: an engineered sucrose phosphorylase for the production of kojibiose from sucrose and glucose.
Collapse
Affiliation(s)
- Tom Verhaeghe
- Centre for Industrial Biotechnology and Biocatalysis
- Department of Biochemical and Microbial Technology
- Ghent University
- B-9000 Ghent
- Belgium
| | - Karel De Winter
- Centre for Industrial Biotechnology and Biocatalysis
- Department of Biochemical and Microbial Technology
- Ghent University
- B-9000 Ghent
- Belgium
| | - Magali Berland
- Unité Fonctionnalité et Ingénierie des Protéines (UFIP)
- UMR CNRS 6286
- Université de Nantes
- 44322 Nantes Cedex 3
- France
| | - Rob De Vreese
- SynBioC Research Group
- Department of Sustainable Organic Chemistry and Technology
- Ghent University
- B-9000 Ghent
- Belgium
| | - Matthias D'hooghe
- SynBioC Research Group
- Department of Sustainable Organic Chemistry and Technology
- Ghent University
- B-9000 Ghent
- Belgium
| | - Bernard Offmann
- Unité Fonctionnalité et Ingénierie des Protéines (UFIP)
- UMR CNRS 6286
- Université de Nantes
- 44322 Nantes Cedex 3
- France
| | - Tom Desmet
- Centre for Industrial Biotechnology and Biocatalysis
- Department of Biochemical and Microbial Technology
- Ghent University
- B-9000 Ghent
- Belgium
| |
Collapse
|
41
|
Chen C, Van der Borght J, De Vreese R, D'hooghe M, Soetaert W, Desmet T. Engineering the specificity of trehalose phosphorylase as a general strategy for the production of glycosyl phosphates. Chem Commun (Camb) 2015; 50:7834-6. [PMID: 24909572 DOI: 10.1039/c4cc02202e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A two-step process is reported for the anomeric phosphorylation of galactose, using trehalose phosphorylase as biocatalyst. The monosaccharide enters this process as acceptor but can subsequently be released from the donor side, thanks to the non-reducing nature of the disaccharide intermediate. A key development was the creation of an optimized enzyme variant that displays a strict specificity (99%) for β-galactose 1-phosphate as product.
Collapse
Affiliation(s)
- Chao Chen
- Centre for Industrial Biotechnology and Biocatalysis Department of Biochemical and Microbial Technology, Ghent University, 9000 Ghent, Belgium.
| | | | | | | | | | | |
Collapse
|
42
|
Mollet K, Decuyper L, Vander Meeren S, Piens N, De Winter K, Desmet T, D'hooghe M. Synthesis of 2-aryl-3-(2-cyanoethyl)aziridines and their chemical and enzymatic hydrolysis towards γ-lactams and γ-lactones. Org Biomol Chem 2015; 13:2716-25. [DOI: 10.1039/c4ob02615b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Trans- andcis-2-aryl-3-(2-cyanoethyl)aziridines were transformed into 4-[aryl(alkylamino)methyl]butyrolactones and/or 5-[aryl(hydroxy)methyl]pyrrolidin-2-onesviachemical and enzymatic hydrolysis of the cyano group, followed by ring expansion.
Collapse
Affiliation(s)
- Karen Mollet
- SynBioC Research Group
- Department of Sustainable Organic Chemistry and Technology
- Faculty of Bioscience Engineering
- Ghent University
- B-9000 Ghent
| | - Lena Decuyper
- SynBioC Research Group
- Department of Sustainable Organic Chemistry and Technology
- Faculty of Bioscience Engineering
- Ghent University
- B-9000 Ghent
| | - Saskia Vander Meeren
- SynBioC Research Group
- Department of Sustainable Organic Chemistry and Technology
- Faculty of Bioscience Engineering
- Ghent University
- B-9000 Ghent
| | - Nicola Piens
- SynBioC Research Group
- Department of Sustainable Organic Chemistry and Technology
- Faculty of Bioscience Engineering
- Ghent University
- B-9000 Ghent
| | - Karel De Winter
- Department of Biochemical and Microbial Technology
- Faculty of Bioscience Engineering
- Ghent University
- B-9000 Ghent
- Belgium
| | - Tom Desmet
- Department of Biochemical and Microbial Technology
- Faculty of Bioscience Engineering
- Ghent University
- B-9000 Ghent
- Belgium
| | - Matthias D'hooghe
- SynBioC Research Group
- Department of Sustainable Organic Chemistry and Technology
- Faculty of Bioscience Engineering
- Ghent University
- B-9000 Ghent
| |
Collapse
|
43
|
De Vreese R, Van Steen N, Verhaeghe T, Desmet T, Bougarne N, De Bosscher K, Benoy V, Haeck W, Van Den Bosch L, D'hooghe M. Synthesis of benzothiophene-based hydroxamic acids as potent and selective HDAC6 inhibitors. Chem Commun (Camb) 2015; 51:9868-71. [DOI: 10.1039/c5cc03295d] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A small library of 3-[(4-hydroxycarbamoylphenyl)aminomethyl]benzothiophenes was prepared, leading to the identification of three representatives as potent and selective HDAC6 inhibitors.
Collapse
|
44
|
Vandekerckhove S, D'hooghe M. Quinoline-based antimalarial hybrid compounds. Bioorg Med Chem 2014; 23:5098-119. [PMID: 25593097 DOI: 10.1016/j.bmc.2014.12.018] [Citation(s) in RCA: 144] [Impact Index Per Article: 14.4] [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: 09/04/2014] [Revised: 12/03/2014] [Accepted: 12/11/2014] [Indexed: 10/24/2022]
Abstract
Quinoline-containing compounds, such as quinine and chloroquine, have a long-standing history as potent antimalarial agents. However, the increasing resistance of the Plasmodium parasite against these drugs and the lack of licensed malaria vaccines have forced chemists to develop synthetic strategies toward novel biologically active molecules. A strategy that has attracted considerable attention in current medicinal chemistry is based on the conjugation of two biologically active molecules into one hybrid compound. Since quinolines are considered to be privileged antimalarial building blocks, the synthesis of quinoline-containing antimalarial hybrids has been elaborated extensively in recent years. This review provides a literature overview of antimalarial hybrid molecules containing a quinoline core, covering publications between 2009 and 2014.
Collapse
Affiliation(s)
- Stéphanie Vandekerckhove
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium.
| |
Collapse
|
45
|
Vandekerckhove S, Van Herreweghe S, Willems J, Danneels B, Desmet T, de Kock C, Smith PJ, Chibale K, D'hooghe M. Synthesis of functionalized 3-, 5-, 6- and 8-aminoquinolines via intermediate (3-pyrrolin-1-yl)- and (2-oxopyrrolidin-1-yl)quinolines and evaluation of their antiplasmodial and antifungal activity. Eur J Med Chem 2014; 92:91-102. [PMID: 25544689 DOI: 10.1016/j.ejmech.2014.12.020] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [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: 09/16/2014] [Revised: 11/28/2014] [Accepted: 12/11/2014] [Indexed: 12/17/2022]
Abstract
(3-Pyrrolin-1-yl)- and (2-oxopyrrolidin-1-yl)quinolines were prepared via cyclization of diallylaminoquinolines and 4-chloro-N-quinolinylbutanamides, respectively, as novel synthetic intermediates en route to N-functionalized 3-, 5-, 6- and 8-aminoquinolines with potential biological activity. (3-Pyrrolin-1-yl)quinolines were subjected to bromination reactions, and the reactivity of (2-oxopyrrolidin-1-yl)quinolines toward lithium aluminum hydride and methyllithium was assessed, providing an entry into a broad range of novel functionalized (pyrrolidin-1-yl)- and (hydroxyalkylamino)quinolines. Antiplasmodial evaluation of these novel quinolines and their functionalized derivatives revealed moderate micromolar potency against a chloroquine-sensitive strain of the malaria parasite Plasmodium falciparum, and the two most potent compounds also showed micromolar activity against a chloroquine-resistant strain of P. falciparum. Antifungal assessment of (hydroxyalkylamino)quinolines revealed three compounds with promising MIC values against Rhodotorula bogoriensis and one compound with potent activity against Aspergillus flavus.
Collapse
Affiliation(s)
- Stéphanie Vandekerckhove
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Sofie Van Herreweghe
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Jasmine Willems
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Barbara Danneels
- Centre for Industrial Biotechnology and Biocatalysis, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Tom Desmet
- Centre for Industrial Biotechnology and Biocatalysis, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium
| | - Carmen de Kock
- Division of Pharmacology, University of Cape Town, K45, OMB, Groote Schuur Hospital, Observatory, 7925, South Africa
| | - Peter J Smith
- Division of Pharmacology, University of Cape Town, K45, OMB, Groote Schuur Hospital, Observatory, 7925, South Africa
| | - Kelly Chibale
- South African Medical Research Council Drug Discovery and Development Research Unit, Department of Chemistry and Institute of Infectious Disease & Molecular Medicine, University of Cape Town, Rondebosch, 7701, South Africa
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000, Ghent, Belgium.
| |
Collapse
|
46
|
Dang Thi TA, Kim Tuyet NT, Pham The C, Thanh Nguyen H, Ba Thi C, Doan Duy T, D'hooghe M, Van Nguyen T. Synthesis and cytotoxic evaluation of novel ester-triazole-linked triterpenoid-AZT conjugates. Bioorg Med Chem Lett 2014; 24:5190-4. [PMID: 25442310 DOI: 10.1016/j.bmcl.2014.09.079] [Citation(s) in RCA: 29] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 09/25/2014] [Indexed: 12/26/2022]
Abstract
Betulinic acid and analogous naturally occurring triterpenoid acids were transformed into the corresponding propargyl esters and subsequently deployed as substrates for a click chemistry-mediated coupling with azidothymidine (AZT) en route to novel 1,2,3-triazole-tethered triterpenoid-AZT conjugates. Twelve new hybrids were thus prepared and assessed in terms of their cytotoxic activity, revealing an interesting anticancer activity of five triterpenoid-AZT hybrids on KB and Hep-G2 tumor cell lines.
Collapse
Affiliation(s)
- Tuyet Anh Dang Thi
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
| | - Nguyen Thi Kim Tuyet
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
| | - Chinh Pham The
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
| | - Ha Thanh Nguyen
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
| | - Cham Ba Thi
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
| | - Tien Doan Duy
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
| | - Tuyen Van Nguyen
- Institute of Chemistry, Vietnam Academy of Science and Technology, 18-Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
| |
Collapse
|
47
|
Moens M, De Kimpe N, D'hooghe M. Selective synthesis of cis- and trans-2-(methyl/phenyl)-3-(trifluoromethyl)aziridines and their regio- and stereospecific ring opening. J Org Chem 2014; 79:5558-68. [PMID: 24845942 DOI: 10.1021/jo5007448] [Citation(s) in RCA: 38] [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: 11/28/2022]
Abstract
A convenient and stereoselective approach toward cis- and trans-1-alkyl-2-(methyl/phenyl)-3-(trifluoromethyl)aziridines was developed starting from the corresponding α,α,α-trifluoroketones via imination, α-chlorination, and hydride-induced ring closure. The reactivity of these newly synthesized nonactivated α-CF3-aziridines was evaluated by applying N-protonation or N-alkylation to effect regio- and stereospecific aziridine ring opening by oxygen, halogen, sulfur, and nitrogen nucleophiles. Furthermore, nonactivated α-CF3-aziridines were easily transformed into their activated analogues by replacing the N-benzyl protecting group with a N-tosyl group, rendering these α-CF3-aziridines much more susceptible to nucleophilic ring opening.
Collapse
Affiliation(s)
- Matthias Moens
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University , Coupure Links 653, B-9000 Ghent, Belgium
| | | | | |
Collapse
|
48
|
Pejović A, Denić MS, Stevanović D, Damljanović I, Vukićević M, Kostova K, Tavlinova-Kirilova M, Randjelović P, Stojanović NM, Bogdanović GA, Blagojević P, D'hooghe M, Radulović NS, Vukićević RD. Discovery of anxiolytic 2-ferrocenyl-1,3-thiazolidin-4-ones exerting GABAA receptor interaction via the benzodiazepine-binding site. Eur J Med Chem 2014; 83:57-73. [PMID: 24950490 DOI: 10.1016/j.ejmech.2014.05.062] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Revised: 05/05/2014] [Accepted: 05/25/2014] [Indexed: 11/26/2022]
Abstract
Herein, we report on the synthesis, spectral, crystallographic and electrochemical properties of a small library of N-substituted 2-ferrocenyl-1,3-thiazolidin-4-ones, designed as novel GABAA benzodiazepine-binding site ligands. The anxiolytic properties of the title compounds were evaluated in several different in vivo models, whereas the involvement of the GABAA receptor complex in the activity of the most potent compound, 2-ferrocenyl-3-(4-methoxyphenylethyl)-1,3-thiazolidin-4-one, was inferred from experiments with known GABAA-targeting agents. Ligand docking experiments revealed that the high, dose-dependent, anxiolytic activity of the new compounds might be due to their favorable interactions with the benzodiazepine-binding site of the GABAA receptor complex. The incorporation of the ferrocene core and fine tuning of the distance between the thiazolidinone core and an additional aromatic ring were judged to be crucial structural requirements for the observed anxiolytic effect.
Collapse
Affiliation(s)
- Anka Pejović
- Department of Chemistry, Faculty of Science, University of Kragujevac, R. Domanovića 12, 34000 Kragujevac, Serbia
| | - Marija S Denić
- Department of Chemistry, Faculty of Science and Mathematics, University of Niš, Višegradska 33, 18000 Niš, Serbia
| | - Dragana Stevanović
- Department of Chemistry, Faculty of Science, University of Kragujevac, R. Domanovića 12, 34000 Kragujevac, Serbia
| | - Ivan Damljanović
- Department of Chemistry, Faculty of Science, University of Kragujevac, R. Domanovića 12, 34000 Kragujevac, Serbia
| | - Mirjana Vukićević
- Department of Pharmacy, Faculty of Medicinal Sciences, University of Kragujevac, S. Markovića 69, 34000 Kragujevac, Serbia
| | - Kalina Kostova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Bl. 9, Acad. G. Bonchev Str., Sofia 1113, Bulgaria
| | - Maya Tavlinova-Kirilova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Bl. 9, Acad. G. Bonchev Str., Sofia 1113, Bulgaria
| | - Pavle Randjelović
- Department of Physiology, Faculty of Medicine, University of Niš, Bulevаr Zorana Đinđića 81, 18000 Niš, Serbia
| | - Nikola M Stojanović
- Faculty of Medicine, University of Niš, Bulevаr Zorana Đinđića 81, 18000 Niš, Serbia
| | - Goran A Bogdanović
- Vinča Institute of Nuclear Sciences, Laboratory of Theoretical Physics and Condensed Matter Physics, PO Box 522, 11001 Belgrade, Serbia
| | - Polina Blagojević
- Department of Chemistry, Faculty of Science and Mathematics, University of Niš, Višegradska 33, 18000 Niš, Serbia
| | - Matthias D'hooghe
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Ghent University, Coupure Links 653, B-9000 Gent, Belgium
| | - Niko S Radulović
- Department of Chemistry, Faculty of Science and Mathematics, University of Niš, Višegradska 33, 18000 Niš, Serbia.
| | - Rastko D Vukićević
- Department of Chemistry, Faculty of Science, University of Kragujevac, R. Domanovića 12, 34000 Kragujevac, Serbia.
| |
Collapse
|
49
|
Dolfen J, Kenis S, Van Hecke K, De Kimpe N, D'hooghe M. Selective synthesis of functionalized trifluoromethylated pyrrolidines, piperidines, and azepanes starting from 1-tosyl-2-(trifluoromethyl)aziridine. Chemistry 2014; 20:10650-3. [PMID: 24523231 DOI: 10.1002/chem.201304759] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [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: 12/04/2013] [Indexed: 11/09/2022]
Abstract
This paper reports on the generation and alkylation of the 1-tosyl-2-(trifluoromethyl)aziridin-2-yl anion with ω,ω'-dihaloalkanes, followed by a novel ring-expansion protocol toward 2-CF3-pyrrolidines, 2-CF3-piperidines, and 3-CF3-azepanes. A variety of halogen, oxygen, nitrogen, sulfur, and carbon nucleophiles was used to trigger this ring rearrangement, resulting in CF3-azaheterocycles bearing different types of functionalized side chains.
Collapse
Affiliation(s)
- Jeroen Dolfen
- SynBioC Research Group, Department of Sustainable Organic Chemistry and Technology, Faculty of Bioscience Engineering, Ghent University, Coupure Links 653, 9000 Ghent (Belgium), Fax: (+32) 9-264-62-21
| | | | | | | | | |
Collapse
|
50
|
Ji MK, Hertsen D, Yoon DH, Eum H, Goossens H, Waroquier M, Van Speybroeck V, D'hooghe M, De Kimpe N, Ha HJ. Nucleophile-dependent regio- and stereoselective ring opening of 1-azoniabicyclo[3.1.0]hexane tosylate. Chem Asian J 2014; 9:1060-7. [PMID: 24488926 DOI: 10.1002/asia.201301551] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [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: 11/19/2013] [Revised: 12/09/2013] [Indexed: 11/09/2022]
Abstract
1-[(1R)-(1-Phenylethyl)]-1-azoniabicyclo[3.1.0]hexane tosylate was generated as a stable bicyclic aziridinium salt from the corresponding 2-(3-hydroxypropyl)aziridine upon reaction with p-toluenesulfonyl anhydride. This bicyclic aziridinium ion was then treated with various nucleophiles including halides, azide, acetate, and cyanide in CH3CN to afford either piperidines or pyrrolidines through regio- and stereoselective ring opening, mediated by the characteristics of the applied nucleophile. On the basis of DFT calculations, ring-opening reactions under thermodynamic control yield piperidines, whereas reactions under kinetic control can yield both piperidines and pyrrolidines depending on the activation energies for both pathways.
Collapse
Affiliation(s)
- Mi-Kyung Ji
- Department of Chemistry, Hankuk University of Foreign Studies, Yongin, 449-791 (Korea)
| | | | | | | | | | | | | | | | | | | |
Collapse
|