1
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Grisez T, Ravi NP, Froeyen M, Schols D, Van Meervelt L, De Jonghe S, Dehaen W. Synthesis of a 3,7-Disubstituted Isothiazolo[4,3- b]pyridine as a Potential Inhibitor of Cyclin G-Associated Kinase. Molecules 2024; 29:954. [PMID: 38474466 DOI: 10.3390/molecules29050954] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 02/07/2024] [Accepted: 02/20/2024] [Indexed: 03/14/2024] Open
Abstract
Disubstituted isothiazolo[4,3-b]pyridines are known inhibitors of cyclin G-associated kinase. Since 3-substituted-7-aryl-isothiazolo[4,3-b]pyridines remain elusive, a strategy was established to prepare this chemotype, starting from 2,4-dichloro-3-nitropyridine. Selective C-4 arylation using ligand-free Suzuki-Miyaura coupling and palladium-catalyzed aminocarbonylation functioned as key steps in the synthesis. The 3-N-morpholinyl-7-(3,4-dimethoxyphenyl)-isothiazolo[4,3-b]pyridine was completely devoid of GAK affinity, in contrast to its 3,5- and 3,6-disubstituted congeners. Molecular modeling was applied to rationalize its inactivity as a GAK ligand.
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Affiliation(s)
- Tom Grisez
- Department of Chemistry, Sustainable Chemistry for Metals and Molecules, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Nitha Panikkassery Ravi
- Department of Chemistry, Sustainable Chemistry for Metals and Molecules, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Mathy Froeyen
- Laboratory of Medicinal Chemistry, Rega Institute for Medical Research, Department of Pharmaceutical and Pharmacological Sciences, KU Leuven, Herestraat 49, P.O. Box 1041, B-3000 Leuven, Belgium
| | - Dominique Schols
- Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, Department of Microbiology, Immunology and Transplantation, KU Leuven, Herestraat 49, P.O. Box 1043, B-3000 Leuven, Belgium
| | - Luc Van Meervelt
- Department of Chemistry, Biomolecular Architecture, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Steven De Jonghe
- Laboratory of Virology and Chemotherapy, Rega Institute for Medical Research, Department of Microbiology, Immunology and Transplantation, KU Leuven, Herestraat 49, P.O. Box 1043, B-3000 Leuven, Belgium
| | - Wim Dehaen
- Department of Chemistry, Sustainable Chemistry for Metals and Molecules, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
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2
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Le TD, Nguyen TC, Hoang TKD, Huynh MK, Phan QT, Van Meervelt L. Synthesis, crystal structure and Hirshfeld surface analysis of 2-({5-[(naphthalen-1-yl)meth-yl]-4-phenyl-4 H-1,2,4-triazol-3-yl}sulfan-yl)-1-(4-nitro-phen-yl)ethanone. Acta Crystallogr E Crystallogr Commun 2024; 80:218-222. [PMID: 38333127 PMCID: PMC10848969 DOI: 10.1107/s2056989024000859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 01/23/2024] [Indexed: 02/10/2024]
Abstract
The title compound, C27H20N4O3S, crystallizes in the monoclinic system, space group P21/n, with Z = 4. The global shape of the mol-ecule is determined by the orientation of the substituents on the central 4H-1,2,4-triazole ring. The nitro-phenyl ring, phenyl ring, and naphthalene ring system are oriented at dihedral angles of 82.95 (17), 77.14 (18) and 89.46 (15)°, respectively, with respect to the triazole ring. The crystal packing features chain formation in the b-axis direction by S⋯O inter-actions. A Hirshfeld surface analysis indicates that the highest contributions to surface contacts arise from contacts in which H atoms are involved.
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Affiliation(s)
- Trong Duc Le
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet Street, Cau Giay District, Hanoi, Vietnam
- Institute of Chemical Technology, Vietnam Academy of Science and Technology, 1A Thanh Loc 29 Street, District 12, Ho Chi Minh City, Vietnam
| | - Tien Cong Nguyen
- Faculty of Chemistry, Ho Chi Minh City University of Education, 280 An Duong Vuong Street, District No. 5, Ho Chi Minh City, Vietnam
| | - Thi Kim Dung Hoang
- Institute of Chemical Technology, Vietnam Academy of Science and Technology, 1A Thanh Loc 29 Street, District 12, Ho Chi Minh City, Vietnam
| | - Minh Khoi Huynh
- Hau Nghia High School, 825 Street Section A, Duc Hoa District, Long An Province, Vietnam
| | - Quang Thang Phan
- Hau Nghia High School, 825 Street Section A, Duc Hoa District, Long An Province, Vietnam
| | - Luc Van Meervelt
- Department of Chemistry, KU Leuven, Biomolecular Architecture, Celestijnenlaan 200F, Leuven (Heverlee), B-3001, Belgium
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3
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Kordnezhadian R, De Bels T, Su K, Van Meervelt L, Ismalaj E, Demaerel J, De Borggraeve WM. An Extrusion Strategy for On-Demand SF 5Cl Gas Generation from a Commercial Disulfide. Org Lett 2023. [PMID: 38051525 DOI: 10.1021/acs.orglett.3c03886] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Herein we report a novel methodology for the ex situ generation of SF5Cl by employing 4,4'-dipyridyl disulfide as a safe commercial reagent, obviating the need for lecture bottles. The method is applicable to certain SF5Cl-involving transformations by using a two-chamber reactor. Moreover, easily applying SF5Cl in different solvents is rendered feasible, while avoiding the use of glovebox techniques. This report also suggests 1H-19F HOESY as a simple and fast stereochemistry indication for chloropentafluorosulfanylated olefins.
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Affiliation(s)
- Reza Kordnezhadian
- Sustainable Chemistry for Metals and Molecules, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, P.O. Box 2404, B-3001 Leuven (Heverlee), Belgium
| | - Tim De Bels
- Sustainable Chemistry for Metals and Molecules, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, P.O. Box 2404, B-3001 Leuven (Heverlee), Belgium
| | - Kexin Su
- Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, P.O. Box 2404, B-3001 Leuven (Heverlee), Belgium
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, P.O. Box 2404, B-3001 Leuven (Heverlee), Belgium
| | - Ermal Ismalaj
- Molecular and Functional Biomarkers, CIC-BiomaGUNE, Paseo Miramon 182, 20014 Donostia-San Sebastian, Spain
| | - Joachim Demaerel
- Molecular and Functional Biomarkers, CIC-BiomaGUNE, Paseo Miramon 182, 20014 Donostia-San Sebastian, Spain
| | - Wim M De Borggraeve
- Sustainable Chemistry for Metals and Molecules, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, P.O. Box 2404, B-3001 Leuven (Heverlee), Belgium
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4
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Abad N, Al-Ostoot FH, Ashraf S, Chkirate K, Aljohani MS, Alharbi HY, Buhlak S, El Hafi M, Van Meervelt L, Al-Maswari BM, Essassi EM, Ramli Y. Synthesis, crystal structure, DFT, Hirshfeld surface analysis, energy frameworks and in-Silico drug-targeting PFKFB3 kinase of novel triazolequinoxalin derivative (TZQ) as a therapeutic Strategy against cancer. Heliyon 2023; 9:e21312. [PMID: 37920528 PMCID: PMC10618769 DOI: 10.1016/j.heliyon.2023.e21312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2023] [Revised: 10/14/2023] [Accepted: 10/19/2023] [Indexed: 11/04/2023] Open
Abstract
Overall, drug design is a dynamic and evolving field, with researchers constantly working to improve their understanding of molecular interactions, develop new computational methods, and explore innovative techniques for creating effective and safe medications. The process can involve steps such as the identification of targets, the discovery of lead compounds, lead optimization, preliminary testing, human trials, regulatory approval and finally post-marketing surveillance, all aimed at bringing a new drug from concept to market. In this article, the synthesis of the novel triazolequinoxalin (TZQ) 1-((1-hexyl-1H-1,2,3-triazol-5-yl)methyl)-3-phenylquinoxalin-2(1H)-one (4) is reported. The structure has been identified with a variety of spectroscopic methods (1H, 13C NMR, and LC-MS) and finally, the structure has been determined by X-ray diffraction (XRD) studies. The TZQ molecule has crystallized in the monoclinic space C2/c group with unit cell dimensions a = 41.201(2) Å, b = 10.6339(6) Å, c = 9.4997(4) Å, β = 93.904(4). The crystal structure is stabilized by intermolecular interactions (N-H ⋯ O and N-H … Cg) occurring within the molecule. The presence of these intermolecular interactions is evaluated through analysis of Hirshfeld surfaces (HS) and two-dimensional (2D) chemical fingerprints map. Additionally, energy frameworks were employed to identify the prevailing interaction energy influencing the molecular arrangement. Density Functional Theory (DFT) calculations were computed to establish concurrence between theoretical and experimental results. Furthermore, the HOMO-LUMO energy levels were determined using the B3LYP/6-31+G(d, p) level of theory. Finally, molecular docking was used to predict the anti-cancer activity of the compound (4) against PFKFB3 kinase and presented noticeable hydrophilic and hydrophobic interactions at the active site region.
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Affiliation(s)
- Nadeem Abad
- Department of Biochemistry, Faculty of Education & Science, Al-Baydha University, Yemen
- Laboratory of Heterocyclic Organic Chemistry URAC 21, Pharmacochemistry Competence Center, Av. Ibn Battouta, BP 1014, Faculty of Sciences, Mohammed V University in Rabat, 10010, Morocco
| | - Fares Hezam Al-Ostoot
- Department of Biochemistry, Faculty of Education & Science, Al-Baydha University, Yemen
| | - Sajda Ashraf
- Dr.PanjwaniCenter for Molecular Medicine and Drug Research, International Center for Chemical and Biological Sciences, University of Karachi, Karachi 75270, Pakistan
| | - Karim Chkirate
- Laboratory of Heterocyclic Organic Chemistry URAC 21, Pharmacochemistry Competence Center, Av. Ibn Battouta, BP 1014, Faculty of Sciences, Mohammed V University in Rabat, 10010, Morocco
| | - Majed S. Aljohani
- Department of Chemistry, Faculty of Science, Taibah University, Yanbu, Saudi Arabia
| | - Hussam Y. Alharbi
- Department of Chemistry, Faculty of Science, Taibah University, Yanbu, Saudi Arabia
| | - Shafeek Buhlak
- Department of Chemistry, Abantİzzet Baysal University, 14280 Bolu, Turkey
| | - Mohamed El Hafi
- Laboratory of Heterocyclic Organic Chemistry URAC 21, Pharmacochemistry Competence Center, Av. Ibn Battouta, BP 1014, Faculty of Sciences, Mohammed V University in Rabat, 10010, Morocco
| | - Luc Van Meervelt
- Laboratory of Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven, B-3001, Belgium
| | - Basheer M. Al-Maswari
- Department of Chemistry, Yuvaraja's College, University of Mysore, Mysuru, Karnataka 570005, India
| | - El Mokhtar Essassi
- Laboratory of Heterocyclic Organic Chemistry URAC 21, Pharmacochemistry Competence Center, Av. Ibn Battouta, BP 1014, Faculty of Sciences, Mohammed V University in Rabat, 10010, Morocco
| | - Youssef Ramli
- Laboratory of Medicinal Chemistry, Drug Sciences Research Center, Faculty of Medicine and Pharmacy, Mohammed V University in Rabat, Morocco
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5
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Le Thi Hong H, Le Phuong T, Van Pham T, Minh Thi Nguyen H, Van Meervelt L. Unusual reaction of ( E)-2-[(benzo[ d]thia-zol-2-yl-imino)-meth-yl]-5-(di-ethyl-amino)-phenol with tri-phenyl-borane: crystal structures and optical properties. Acta Crystallogr E Crystallogr Commun 2023; 79:982-987. [PMID: 37936854 PMCID: PMC10626958 DOI: 10.1107/s2056989023008514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2023] [Accepted: 09/27/2023] [Indexed: 11/09/2023]
Abstract
The mol-ecular and crystal structure of (E)-2-[(benzo[d]thia-zol-2-yl-imino)-meth-yl]-5-(di-ethyl-amino)-phenol (C18H19N3O2S, Et2N-Bz) and its unexpected reaction product with tri-phenyl-borane, 2,2-diphenyl-1,3-dioxa-2-borata-1,2-di-hydro-naphthalene [systematic name: N,N-diethyl-2,2-diphenyl-2H-1,3λ3,2λ4-ben-zodioxaborinin-7-amine, C23H24BNO2, (I)] are described. For Et2N-Bz, the hydroxyl group is involved in an intra-molecular hydrogen bond with the imino nitro-gen atom and the C=N bond displays an E configuration. The crystal packing is characterized by layers of inversion dimers parallel to the (10) plane and chains of mol-ecule in the a-axis direction formed through C-H⋯O inter-actions. Complex (I) crystallizes with two mol-ecules (A and B) in the asymmetric unit, which differ in the orientation of the ethyl groups. The 1,3-dioxa-2-borata-1,2,3,4-tetra-hydro-naphthalene ring displays a slight envelope conformation with the boron atom as the flap. In the crystal packing, chains of alternating A and B mol-ecules formed by C-H⋯O hydrogen bonds run in the b-axis direction. The UV-vis absorption and emission properties of the compounds are discussed and their aggregation-induced emission properties are further investigated.
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Affiliation(s)
- Hai Le Thi Hong
- Department of Chemistry, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi, Vietnam
| | - Thao Le Phuong
- Department of Chemistry, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi, Vietnam
| | - Thong Van Pham
- Department of Chemistry, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi, Vietnam
| | - Hue Minh Thi Nguyen
- Department of Chemistry, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi, Vietnam
| | - Luc Van Meervelt
- Department of Chemistry, KU Leuven, Biomolecular Architecture, Celestijnenlaan 200F, Leuven (Heverlee), B-3001, Belgium
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6
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Lentink S, Salazar Marcano DE, Moussawi MA, Vandebroek L, Van Meervelt L, Parac-Vogt TN. Fine-tuning non-covalent interactions between hybrid metal-oxo clusters and proteins. Faraday Discuss 2023; 244:21-38. [PMID: 37102318 DOI: 10.1039/d2fd00161f] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Interactions between the protein Hen Egg White Lysozyme (HEWL) and three different hybrid Anderson-Evans polyoxometalate clusters - AE-NH2 (δ-[MnMo6O18{(OCH2)3CNH2}2]3-), AE-CH3 (δ-[MnMo6O18{(OCH2)3CCH3}2]3-) and AE-Biot (δ-[MnMo6O18{(OCH2)3CNHCOC9H15N2OS}2]3-) - were studied via tryptophan fluorescence spectroscopy and single crystal X-ray diffraction. Quenching of tryptophan fluorescence was observed in the presence of all three hybrid polyoxometalate clusters (HPOMs), but the extent of quenching and the binding affinity were greatly dependent on the nature of the organic groups attached to the cluster. Control experiments further revealed the synergistic effect of the anionic polyoxometalate core and organic ligands towards enhanced protein interactions. Furthermore, the protein was co-crystallised with each of the three HPOMs, resulting in four different crystal structures, thus allowing for the binding modes of HPOM-protein interactions to be investigated with near-atomic precision. All crystal structures displayed a unique mode of binding of the HPOMs to the protein, with both functionalisation and the pH of the crystallisation conditions influencing the interactions. From the crystal structures, it was determined that HPOM-protein non-covalent complexes formed through a combination of electrostatic attraction between the polyoxometalate cluster and positively charged surface regions of HEWL, and direct and water-mediated hydrogen bonds with both the metal-oxo inorganic core and the functional groups of the ligand, where possible. Hence, functionalisation of metal-oxo clusters shows great potential in tuning their interactions with proteins, which is of interest for several biomedical applications.
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Affiliation(s)
- Sarah Lentink
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven 3001, Belgium.
| | | | - Mhamad Aly Moussawi
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven 3001, Belgium.
| | - Laurens Vandebroek
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven 3001, Belgium.
| | - Luc Van Meervelt
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven 3001, Belgium.
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7
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Li BY, Su K, Van Meervelt L, Verhelst SHL, Ismalaj E, De Borggraeve WM, Demaerel J. Ex situ Generation of Thiazyl Trifluoride (NSF3) as a Gaseous SuFEx Hub. Angew Chem Int Ed Engl 2023:e202305093. [PMID: 37202369 DOI: 10.1002/anie.202305093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/12/2023] [Accepted: 05/15/2023] [Indexed: 05/20/2023]
Abstract
Sulfur(VI)-fluoride exchange (SuFEx) chemistry, an all-encompassing term for substitution events that replace fluoride at an electrophilic sulfur(VI), enables the rapid and flexible assembly of linkages around a SVI core. Although a myriad of nucleophiles and applications work very well with the SuFEx concept, the electrophile design has remained largely SO2-based. Here, we introduce S≡N-based fluorosulfur(VI) reagents to the realm of SuFEx chemistry. Thiazyl trifluoride (NSF3) gas is shown to serve as an excellent parent compound and SuFEx hub to efficiently synthesize mono- and disubstituted fluorothiazynes in an ex situ generation workflow. Gaseous NSF3 was evolved from commercial reagents in a nearly quantitative fashion at ambient conditions. Moreover, the monosubstituted thiazynes could be extended further as SuFEx handles and be engaged in the synthesis of unsymmetrically disubstituted thiazynes. These results provide valuable insights into the versatility of these understudied sulfur functionalities, paving the way for future applications.
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Affiliation(s)
- Bing-Yu Li
- KU Leuven University: Katholieke Universiteit Leuven, Chemistry, Celestijnenlaan 200F, box 2404, 3001, Leuven, BELGIUM
| | - Kexin Su
- KU Leuven University: Katholieke Universiteit Leuven, Chemistry, Celestijnenlaan 200F, box 2404, 3001, Leuven, BELGIUM
| | - Luc Van Meervelt
- KU Leuven University: Katholieke Universiteit Leuven, Chemistry, Celestijnenlaan 200F, box 2404, 3001, Leuven, BELGIUM
| | - Steven H L Verhelst
- KU Leuven University: Katholieke Universiteit Leuven, Cellular and Molecular Medicine, Herestraat 49, box 901, O&N I bis, 3000, Leuven, BELGIUM
| | - Ermal Ismalaj
- CIC biomaGUNE, Molecular and Functional Biomarkers lab, Paseo Miramon 194, 20014, San Sebastian, SPAIN
| | - Wim M De Borggraeve
- KU Leuven University: Katholieke Universiteit Leuven, Chemistry, Celestijnenlaan 200F, box 2404, 3001, Leuven, BELGIUM
| | - Joachim Demaerel
- Katholieke Universiteit Leuven, Chemistry, Celestijnenlaan 200F, box 2404, 3001, Leuven, BELGIUM
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8
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Reniers F, Anthonissen S, Van Meervelt L, Dehaen W. Three-Step Synthetic Pathway toward Fully Decorated [1,2,3]Triazolo[4,5- d]pyrimidine (8-Azapurine) Derivatives. Org Lett 2023; 25:2820-2824. [PMID: 37067154 DOI: 10.1021/acs.orglett.3c00729] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/18/2023]
Abstract
[1,2,3]Triazolo[4,5-d]pyrimidines (8-azapurines) are known bioisosteres of the purine nucleus. A step-efficient synthesis of 8-azapurines, in particular 6-alkyl derivatives, is currently unavailable. This work focuses on a three-step synthetic pathway for the synthesis of fully decorated 8-azapurines, with special attention on 6-alkyl-8-azapurines. A diverse library of 8-azapurines was obtained starting from various alkynes, azides, and amidines, involving interrupted CuAAC, oxidation, and cyclization reactions. Additionally, postfunctionalization reactions were demonstrated for a selected number of substrates.
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Affiliation(s)
- Felien Reniers
- Sustainable Chemistry for Metals and Molecules, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Stijn Anthonissen
- Sustainable Chemistry for Metals and Molecules, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Wim Dehaen
- Sustainable Chemistry for Metals and Molecules, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
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9
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Bui TYH, De Zitter E, Moeyaert B, Pecqueur L, Srinivasu BY, Economou A, Fontecave M, Van Meervelt L, Dedecker P, Pedre B. Oxygen-induced chromophore degradation in the photoswitchable red fluorescent protein rsCherry. Int J Biol Macromol 2023; 239:124179. [PMID: 36972828 DOI: 10.1016/j.ijbiomac.2023.124179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2022] [Revised: 03/11/2023] [Accepted: 03/22/2023] [Indexed: 03/29/2023]
Abstract
Reversibly switchable monomeric Cherry (rsCherry) is a photoswitchable variant of the red fluorescent protein mCherry. We report that this protein gradually and irreversibly loses its red fluorescence in the dark over a period of months at 4 °C and a few days at 37 °C. We also find that its ancestor, mCherry, undergoes a similar fluorescence loss but at a slower rate. X-ray crystallography and mass spectrometry reveal that this is caused by the cleavage of the p-hydroxyphenyl ring from the chromophore and the formation of two novel types of cyclic structures at the remaining chromophore moiety. Overall, our work sheds light on a new process occurring within fluorescent proteins, further adding to the chemical diversity and versatility of these molecules.
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Affiliation(s)
- Thi Yen Hang Bui
- Biochemistry, Molecular and Structural Biology Unit, Department of Chemistry, KU, Leuven, Belgium
| | - Elke De Zitter
- Université Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale, 38000 Grenoble, France
| | - Benjamien Moeyaert
- Biochemistry, Molecular and Structural Biology Unit, Department of Chemistry, KU, Leuven, Belgium
| | - Ludovic Pecqueur
- Laboratoire de Chimie des Processus Biologiques, Collège de France, UMR 8229 CNRS, Sorbonne Université, PSL University, Paris, France
| | - Bindu Y Srinivasu
- Laboratory of Molecular Bacteriology, Rega Institute, KU, Leuven, Belgium
| | | | - Marc Fontecave
- Laboratoire de Chimie des Processus Biologiques, Collège de France, UMR 8229 CNRS, Sorbonne Université, PSL University, Paris, France
| | - Luc Van Meervelt
- Biochemistry, Molecular and Structural Biology Unit, Department of Chemistry, KU, Leuven, Belgium
| | - Peter Dedecker
- Biochemistry, Molecular and Structural Biology Unit, Department of Chemistry, KU, Leuven, Belgium.
| | - Brandán Pedre
- Biochemistry, Molecular and Structural Biology Unit, Department of Chemistry, KU, Leuven, Belgium.
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10
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Su K, Luo J, Van Meervelt L. Crystal structure and Hirshfeld surface analysis of N-{ N-[amino-(di-methyl-amino)-meth-yl]carbamimido-yl}-3-bromo-benzene-sulfonamide. Acta Crystallogr E Crystallogr Commun 2023; 79:367-372. [PMID: 37057028 PMCID: PMC10088321 DOI: 10.1107/s2056989023002165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 03/07/2023] [Indexed: 04/15/2023]
Abstract
The title compound, C10H14BrN5O2S, is the bromo-benzene-sulfonamide derivative of the type 2 diabetes drug metformin. The asymmetric unit contains two mol-ecules with almost identical conformations but a different orientation of the bromo-phenyl moiety. Both mol-ecules exhibit intra-molecular N-H⋯N and N-H⋯O hydrogen bonds. The mol-ecular packing features chain formation in the a-axis direction by alternating N-H⋯N and N-H⋯O inter-actions. In addition, ring motifs consisting of four mol-ecules and π-π inter-actions between the phenyl rings contribute to the three-dimensional architecture. A Hirshfeld surface analysis shows that the largest contributions to surface contacts arise from contacts in which H atoms are involved.
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Affiliation(s)
- Kexin Su
- Department of Chemistry, KU Leuven, Biomolecular Architecture, Celestijnenlaan 200F, Leuven (Heverlee), B-3001, Belgium
| | - Jiangshui Luo
- College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, People’s Republic of China
| | - Luc Van Meervelt
- Department of Chemistry, KU Leuven, Biomolecular Architecture, Celestijnenlaan 200F, Leuven (Heverlee), B-3001, Belgium
- Correspondence e-mail:
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11
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Le TD, Nguyen TC, Bui TMN, Hoang TKD, Vu QT, Pham CT, Dinh CP, Alhaji JA, Van Meervelt L. SYNTHESIS, STRUCTURE AND α-GLUCOSIDASE INHIBITOR ACTIVITY EVALUATION OF SOME ACETAMIDE DERIVATIVES STARTING FROM 2-(NAPHTHALEN-1-YL) ACETIC ACID, CONTAINING A 1,2,4-TRIAZOLE. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/14/2023]
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12
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Bui TYH, Dedecker P, Van Meervelt L. An unusual disulfide-linked dimerization in the fluorescent protein rsCherryRev1.4. Acta Crystallogr F Struct Biol Commun 2023; 79:38-44. [PMID: 36748340 PMCID: PMC9903139 DOI: 10.1107/s2053230x23000572] [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: 11/22/2022] [Accepted: 01/23/2023] [Indexed: 02/05/2023] Open
Abstract
rsCherryRev1.4 has been reported as one of the reversibly photoswitchable variants of mCherry, and is an improved version with a faster off-switching speed and lower switching fatigue at high light intensities than its precursor rsCherryRev. However, rsCherryRev1.4 still has some limitations such as a tendency to dimerize as well as complex photophysical properties. Here, the crystal structure of rsCherryRev1.4 was determined at a resolution of 2 Å and it was discovered that it forms a dimer that shows disulfide bonding between the protomers. Mutagenesis, gel electrophoresis and size-exclusion chromatography strongly implicate Cys24 in this process. Replacing Cys24 in rsCherryRev1.4 resulted in a much lower tendency towards dimerization, while introducing Cys24 into mCherry correspondingly increased its dimerization. In principle, this finding opens the possibility of developing redox sensors based on controlled dimerization via disulfide cross-linking in fluorescent proteins, even though the actual application of engineering such sensors still requires additional research.
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Affiliation(s)
- Thi Yen Hang Bui
- Biochemistry, Molecular and Structural Biology, Department of Chemistry, KU Leuven, 3001 Leuven, Belgium
| | - Peter Dedecker
- Biochemistry, Molecular and Structural Biology, Department of Chemistry, KU Leuven, 3001 Leuven, Belgium
| | - Luc Van Meervelt
- Biochemistry, Molecular and Structural Biology, Department of Chemistry, KU Leuven, 3001 Leuven, Belgium
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13
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Laamari Y, Bimoussa A, Fawzi M, Oubella A, Rohand T, Van Meervelt L, IttoMorjani MYA, Auhmani A. Synthesis, crystal structure and evaluation of anticancer activities of some novel heterocyclic compounds based on thymol. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.134906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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14
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Chen S, Pillitteri S, Fron E, Van Meervelt L, Van der Eycken EV, Sharma UK. Visible-Light-Induced Cascade Difunctionalization of Indoles Enabled by the Synergy of Photoredox and Photoexcited Ketones: Direct Access to Alkylated Pyrrolophenanthridones. Org Lett 2022; 24:9386-9391. [PMID: 36525615 DOI: 10.1021/acs.orglett.2c03697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Herein, we describe a methodology to construct polycyclic pyrrolophenanthridones with an (amino)alkyl side chain that involves visible-light-induced decarboxylative radical addition for the intermolecular dearomatization of indoles and subsequent photoinduced C(sp2)-X bond activation via photoexcited ketones for an intramolecular cyclization cascade. Carboxylic acids serve both as a radical source toward indole dearomatization and as reductants to initiate an electron transfer with photoexcited N-acylindole derivatives in the reaction toward pyrrolophenantridone skeletons, which occurs under mild reaction conditions with good functional group tolerance.
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Affiliation(s)
- Su Chen
- Laboratory for Organic and Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Serena Pillitteri
- Laboratory for Organic and Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Eduard Fron
- Core Facility for Advanced Spectroscopy, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Erik V Van der Eycken
- Laboratory for Organic and Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.,People's Friendship University of Russia (RUDN University), Miklukho-Maklaya Street 6, RU-117198 Moscow, Russia
| | - Upendra K Sharma
- Laboratory for Organic and Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
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15
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Van Thong P, Van Meervelt L, Chi NTT. Cyclometalated platinum(II) complexes bearing natural arylolefin and quinolines ligands: Synthesis, characterizations, and in vitro cytotoxicity. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.116180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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16
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Liu C, Bolognani A, Song L, Van Meervelt L, Peshkov VA, Van der Eycken EV. Gold(I)-Catalyzed Intramolecular Bicyclization: Divergent Construction of Quinazolinone and Ampakine Analogues. Org Lett 2022; 24:8536-8541. [DOI: 10.1021/acs.orglett.2c03547] [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: 11/16/2022]
Affiliation(s)
- Chao Liu
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Adriano Bolognani
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Liangliang Song
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037 Jiangsu, China
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium
| | - Vsevolod A. Peshkov
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Dushu Lake Campus, Suzhou 215123, P. R. China
- Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Ave, Nur-Sultan 010000, Republic of Kazakhstan
| | - Erik V. Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
- Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya Street 6, Moscow 117198, Russia
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17
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Thi Thanh Chi N, Van Thong P, Tuan Cuong N, Van Meervelt L. Reaction Pathways of Diplatinum Complexes Bearing a Phenylpropene‐ Derived π/σ‐Chelator with Weak/Strong
σ
‐Donor Neutral Ligands. ChemistrySelect 2022. [DOI: 10.1002/slct.202203087] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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)
- Nguyen Thi Thanh Chi
- Department of Chemistry Hanoi National University of Education 136 Xuan Thuy Cau Giay Hanoi Vietnam
| | - Pham Van Thong
- Department of Chemistry Hanoi National University of Education 136 Xuan Thuy Cau Giay Hanoi Vietnam
| | - Ngo Tuan Cuong
- Department of Chemistry Hanoi National University of Education 136 Xuan Thuy Cau Giay Hanoi Vietnam
| | - Luc Van Meervelt
- Chemistry Department, KU Leuven Celestijnenlaan 200F Box 2404, B-3001 Leuven Belgium
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18
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Wouters J, Van Meervelt L. Classroom experiments with artificial sweeteners: growing single crystals and simple calorimetry. Acta Crystallogr E Crystallogr Commun 2022; 78:874-879. [PMID: 36072517 PMCID: PMC9443796 DOI: 10.1107/s2056989022007617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 07/26/2022] [Indexed: 11/16/2022]
Abstract
An easily accessible experimental set-up to grow large single crystals of two sweeteners readily available in supermarkets, erythritol and xylitol, is described. The crystallization of these compounds illustrates the principles of crystallization by evaporation·The crystal-growing experiment is complemented with a simple calorimetric set-up to demonstrate the endothermic nature of the dissolution of the selected sweeteners in a more quantitative approach by measuring the heat of dissolution. An easily accessible experimental set-up to grow large single crystals of two sweeteners readily available in supermarkets, erythritol and xylitol, is described. The crystallization of these compounds illustrates the principles of crystallization by evaporation. As these artificial sweeteners are also known to induce a cool sensation in the mouth, the crystal-growing experiment is complemented with a simple calorimetric set-up to demonstrate the endothermic nature of the dissolution of the selected sweeteners in a more quantitative approach by measuring the heat of dissolution (ΔHdiss). The choice of these two sweeteners also allows use of the freely available WebCSD and Mercury tools to visualize their three-dimensional structure, crystal packing and powder diffractograms, and to deepen stereochemical concepts such as stereoisomers and meso compounds.
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19
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Nguyen NT, Dai VV, Tri NN, Van Meervelt L, Trung NT, Dehaen W. Experimental and theoretical studies on the synthesis of 1,4,5-trisubstituted pyrrolidine-2,3-diones. Beilstein J Org Chem 2022; 18:1140-1153. [PMID: 36105726 PMCID: PMC9443309 DOI: 10.3762/bjoc.18.118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Accepted: 08/18/2022] [Indexed: 11/23/2022] Open
Abstract
Substituted 4-acetyl-3-hydroxy-3-pyrroline-2-ones have been prepared via three-component reactions and the tautomerism of these 3-pyrroline-2-ones is due to the slight difference of energy, and the significantly large rate constant of transformation between two tautomers. 1,4,5-Trisubstituted pyrrolidine-2,3-dione derivatives were prepared from the above mentioned 2-pyrrolidinone derivatives and aliphatic amines, which exist in enamine form and are stabilized by an intramolecular hydrogen bond. A possible reaction mechanism between 3-pyrroline-2-one and aliphatic amine (CH3NH2) was proposed based on computational results and the main product is formed favorably following the PES via the lowest ΔG# pathway in both the gas-phase and an ethanol solvent model. DFT calculations showed that kinetic selectivity is more significant than thermodynamic selectivity for forming main products.
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Affiliation(s)
- Nguyen Tran Nguyen
- Department of Chemistry, University of Science and Education, the University of Da Nang, Ton Duc Thang 459, 550000 Da Nang, Viet Nam
| | - Vo Viet Dai
- Department of Chemistry, University of Science and Education, the University of Da Nang, Ton Duc Thang 459, 550000 Da Nang, Viet Nam
| | - Nguyen Ngoc Tri
- Laboratory of Computational Chemistry and Modelling, Faculty of Natural Sciences, Quy Nhon University, An Duong Vuong 170, 820000 Quy Nhon, Viet Nam
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Nguyen Tien Trung
- Laboratory of Computational Chemistry and Modelling, Faculty of Natural Sciences, Quy Nhon University, An Duong Vuong 170, 820000 Quy Nhon, Viet Nam
| | - Wim Dehaen
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
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20
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Van Hoof M, Bynens L, Daelemans B, González MCR, Van Meervelt L, De Feyter S, Dehaen W. Octahydropyrimido[4,5- g]quinazoline-5,10-diones: their multicomponent synthesis, self-assembly on graphite and electrochemistry. Chem Commun (Camb) 2022; 58:7686-7689. [PMID: 35730551 DOI: 10.1039/d2cc02070j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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 green multicomponent synthesis of previously unreported octahydropyrimido[4,5-g]quinazoline-5,6-diones was developed from simple building blocks. These highly symmetrical compounds show strong propensity to self-assembled molecular network (SAMN) formation on highly oriented pyrolytic graphite. The SAMN type is easily tunable by changing molecular characteristics. The redox behavior was studied by cyclic voltammetery.
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Affiliation(s)
- Max Van Hoof
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
| | - Lize Bynens
- Hasselt University, Institute for Materials Research (IMO), Agoralaan Building D, 3590, Diepenbeek, Belgium
| | - Brent Daelemans
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium.
| | | | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven B-3001, Belgium.
| | - Steven De Feyter
- Division of Molecular Imaging and Photonics, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium.
| | - Wim Dehaen
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
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21
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Trung VQ, Duong TTT, Dua NT, Linh NN, Cuong LD, Thao DP, Huy VK, Phuong NHH, Hien N, Linh DK, Manh VQ, Chinh NT, Hoang T, Van Meervelt L. Synthesis and characterization of some novel polythiophene derivatives containing pyrazoline. Des Monomers Polym 2022; 25:136-147. [PMID: 35693727 PMCID: PMC9186369 DOI: 10.1080/15685551.2022.2086413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Eight polythiophene derivatives containing pyrazoline side groups were synthesized by a chemical oxidative coupling polymerization using FeCl3. The crystal structures of four monomers were determined which confirm the almost perpendicular orientation of the thiophene and pyrazoline rings, while the other substituents are more coplanar. Analyses of IR, 1H-NMR, Raman and UV-Vis spectra demonstrated that the suggested polymerization was successful to generate the synthesized polythiophenes with the expected structures. The morphology of the synthesized polythiophenes was studied by SEM. The different substituents attached to the 1- and 3-positions of the pyrazoline side chain led to differences in optical properties, electrical conductivity, and thermal stability of the synthesized polythiophenes. By adding a pyrazoline side chain to polythiophenes, some polymers achieve good solubility, electrical conductivity of about 1.3 × 10–6 S/cm, high fluorescence intensity (above 40,000 a.u.) at 505–550 nm and thermal stability up to 590°C in the air.
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Affiliation(s)
- Vu Quoc Trung
- Faculty of Chemistry, Hanoi National University of Education, Hanoi, Vietnam
| | | | - Nguyen Thi Dua
- Faculty of Chemistry, Hanoi National University of Education, Hanoi, Vietnam
| | | | | | | | - Vo Khac Huy
- HUS High School for Gifted Student, Hanoi, Vietnam
| | | | - Nguyen Hien
- Faculty of Chemistry, Hanoi National University of Education, Hanoi, Vietnam
| | - Duong Khanh Linh
- Faculty of Chemistry, Hanoi National University of Education, Hanoi, Vietnam
| | - Vu Quoc Manh
- Faculty of Pharmacy, Thanh Do University, Hanoi, Vietnam
| | - Nguyen Thuy Chinh
- Institute for Tropical Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam.,Vietnam Academy of Science and Technology, Graduate University of Science and Technology, Hanoi, Vietnam
| | - Thai Hoang
- Institute for Tropical Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam.,Vietnam Academy of Science and Technology, Graduate University of Science and Technology, Hanoi, Vietnam
| | - Luc Van Meervelt
- Department of Chemistry, KU Leuven, Biomolecular Architecture, Leuven (Heverlee), Belgium
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22
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Oubella A, Laamari Y, Hachim ME, Byadi S, Auhmani A, Morjani H, Riahi A, Podlipnik C, Rohand T, Van Meervelt L, Ait Itto MY. New gem‑dichlorocyclopropane-pyrazole hybrids with monoterpenic skeleton: Synthesis, crystal structure, cytotoxic evaluation, molecular dynamics and theoretical study. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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23
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Song L, Liu C, Tian G, Van Meervelt L, Van der Eycken J, Van der Eycken EV. Late-stage diversification of peptidomimetics and oligopeptides via gold-catalyzed post-Ugi cyclization. Molecular Catalysis 2022. [DOI: 10.1016/j.mcat.2022.112240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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24
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Hong HLT, Huu TN, Anh TD, Nhat KN, Pham Quoc L, Thanh Dang T, Nguyen H, Van Meervelt L. Synthesis, crystal structures and anticancer activities of Cu(II), Zn(II) and Cd(II) complexes containing bis(2-pyridyl)-di(4-methoxyphenyl)ethene. J COORD CHEM 2022. [DOI: 10.1080/00958972.2022.2051498] [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: 10/18/2022]
Affiliation(s)
- Hai Le Thi Hong
- Department of Chemistry, Ha Noi National University of Education, Ha Noi, Vietnam
| | - Thinh Nguyen Huu
- Department of Chemistry, Ha Noi National University of Education, Ha Noi, Vietnam
| | - Tho Duong Anh
- Department of Chemistry, Ha Noi National University of Education, Ha Noi, Vietnam
| | - Khanh Nguyen Nhat
- Department of Chemistry, Ha Noi National University of Education, Ha Noi, Vietnam
| | - Long Pham Quoc
- Department of Chemistry, Ha Noi National University of Education, Ha Noi, Vietnam
| | - Tuan Thanh Dang
- Department of Chemistry, Ha Noi University of Science, Ha Noi, Vietnam
| | - Hien Nguyen
- Department of Chemistry, Ha Noi National University of Education, Ha Noi, Vietnam
| | - Luc Van Meervelt
- Biomolecular Architecture, Chemistry Department KU Leuven, Leuven, Belgium
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25
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Chen S, Van Meervelt L, Van der Eycken EV, Sharma UK. Visible-Light-Driven Palladium-Catalyzed Radical Tandem Dearomatization of Indoles with Unactivated Alkenes. Org Lett 2022; 24:1213-1218. [PMID: 35107015 DOI: 10.1021/acs.orglett.1c04390] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A mild visible-light-driven palladium-catalyzed radical tandem dearomatization of indoles with unactivated alkenes is described with moderate to good yields and good to excellent diastereoselectivities. Under visible-light irradiation, the photoexcited state of the palladium complex was formed, which could transfer a single electron to N-(2-bromobenzoyl)indoles, leading to a hybrid palladium radical chemistry. This provides efficient and atom-economical access to diverse 2,3-disubstituted indoline derivatives.
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Affiliation(s)
- Su Chen
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.,People's Friendship University of Russia (RUDN University), Miklukho-Maklaya Street 6, RU-117198 Moscow, Russia
| | - Upendra K Sharma
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
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26
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Xu X, Feng H, Zhang X, Song L, Van Meervelt L, Van der Eycken J, Harvey JN, Van der Eycken EV. Pd-Catalyzed Ring Restructuring of Oxazolidines with Alkenes Leading to Fused Polycyclic Indolizines. Org Lett 2022; 24:1232-1236. [DOI: 10.1021/acs.orglett.2c00007] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Xianjun Xu
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven B-3001, Belgium
| | - Huangdi Feng
- College of Chemistry and Chemical Engineering and Shanghai Engineering Research Center of Textile Chemistry and Cleaner Production, Shanghai University of Engineering Science, Shanghai 201620, China
| | - Xiaoyong Zhang
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven B-3001, Belgium
- Institute of Systems and Physical Biology, Shenzhen Bay Laboratory, Shenzhen 518055, China
| | - Liangliang Song
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven B-3001, Belgium
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven Celestijnenlaan 200F, Leuven B-3001, Belgium
| | - Johan Van der Eycken
- Laboratory for Organic and Bio-Organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University, KriJgslaan 281 (S.4), B-9000 Ghent, Belgium
| | - Jeremy N. Harvey
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven B-3001, Belgium
| | - Erik V. Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven B-3001, Belgium
- Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya Street 6, Moscow 117198, Russia
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27
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Horsten T, Alegbejo Price TO, Van Meervelt L, Emery FDS, Dehaen W. 2-Imidazolidinone benzofurans as unexpected outcome of the Lewis acid mediated Nenitzescu reaction. NEW J CHEM 2022. [DOI: 10.1039/d1nj04965h] [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: 12/31/2022]
Abstract
Herein, a metal-free methodology towards 2-imidazolidinone benzofurans via piperazinone enaminoesters addition onto quinones and subsequent rearrangement has been disclosed.
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Affiliation(s)
- Tomas Horsten
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven 3001, Belgium
| | - Temitayo Omowumi Alegbejo Price
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences at Ribeirao Preto of the University of Sao Paulo, Ribeirao Preto, SP, 14040-903, Brazil
| | - Luc Van Meervelt
- Biochemistry, Molecular and Structural Biology Section, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven 3001, Belgium
| | - Flavio da Silva Emery
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences at Ribeirao Preto of the University of Sao Paulo, Ribeirao Preto, SP, 14040-903, Brazil
| | - Wim Dehaen
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven 3001, Belgium
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28
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Liu C, Van Meervelt L, Peshkov VA, Van der Eycken EV. The synthesis of diverse benzazepinoindoles via gold-catalyzed post-Ugi alkyne hydroarylation/Michael addition sequence. Org Chem Front 2022. [DOI: 10.1039/d2qo00810f] [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: 12/22/2022]
Abstract
By combining an Ugi-4CR and a gold-catalyzed cascade cyclization, diverse benzazepinoindoles are assembled in a step-economical, chemo- and regioselectivity fashion.
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Affiliation(s)
- Chao Liu
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Vsevolod A. Peshkov
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Dushu Lake Campus, Suzhou 215123, P. R. China
- Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Ave, Nur-Sultan 010000, Republic of Kazakhstan
| | - Erik V. Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium
- Peoples’ Friendship University of Russia (RUDN University), Miklukho-Maklaya Street 6, Moscow, 117198, Russia
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29
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Salazar Marcano DE, Moussawi MA, Anyushin AV, Lentink S, Van Meervelt L, Ivanović-Burmazović I, Parac-Vogt TN. Versatile Post-functionalisation Strategy for the Formation of Modular Organic-Inorganic Polyoxometalate Hybrids. Chem Sci 2022; 13:2891-2899. [PMID: 35382468 PMCID: PMC8905796 DOI: 10.1039/d1sc06326j] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Accepted: 02/07/2022] [Indexed: 11/28/2022] Open
Abstract
Hybrid structures incorporating different organic and inorganic constituents are emerging as a very promising class of materials since they synergistically combine the complementary and diverse properties of the individual components. Hybrid materials based on polyoxometalate clusters (POMs) are particularly interesting due to their versatile catalytic, redox, electronic, and magnetic properties, yet the controlled incorporation of different clusters into a hybrid structure is challenging and has been scarcely reported. Herein we propose a novel and general strategy for combining multiple types of metal-oxo clusters in a single hybrid molecule. Two novel hybrid POM structures (HPOMs) bis-functionalised with dipentaerythritol (R–POM1–R; R = (OCH2)3CCH2OCH2C(CH2OH)) were synthesised as building-blocks for the formation of heterometallic hybrid triads (POM2–R–POM1–R–POM2). Such a modular approach resulted in the formation of four novel heterometallic hybrids combing the Lindqvist {V6}, Anderson–Evans {XMo6} (X = Cr or Al) and trisubstituted Wells–Dawson {P2V3W15} POM structures. Their formation was confirmed by multinuclear Nuclear Magnetic Resonance (NMR), infrared (IR) and UV-Vis spectroscopy, as well as Mass Spectrometry, Diffusion Ordered Spectroscopy (DOSY) and elemental analysis. The thermal stability of the hybrids was also examined by Thermogravimetric Analysis (TGA), which showed that the HPOM triads exhibit higher thermal stability than comparable hybrid structures containing only one type of POM. The one-pot synthesis of these novel compounds was achieved in high yields in aqueous and organic media under simple reflux conditions, without the need of any additives, and could be translated to create other hybrid materials based on a variety of metal-oxo cluster building-blocks. A versatile modular approach has been developed for incorporating different metal-oxo nanoclusters with characteristic structures into a single hybrid molecule by covalently linking them with polyol ligands.![]()
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Affiliation(s)
- David E Salazar Marcano
- Laboratory of Bioinorganic Chemistry, KU Leuven Department of Chemistry Celestijnenlaan 200F 3001 Leuven Belgium
| | - Mhamad Aly Moussawi
- Laboratory of Bioinorganic Chemistry, KU Leuven Department of Chemistry Celestijnenlaan 200F 3001 Leuven Belgium
| | - Alexander V Anyushin
- Laboratory of Bioinorganic Chemistry, KU Leuven Department of Chemistry Celestijnenlaan 200F 3001 Leuven Belgium
| | - Sarah Lentink
- Laboratory of Bioinorganic Chemistry, KU Leuven Department of Chemistry Celestijnenlaan 200F 3001 Leuven Belgium
| | - Luc Van Meervelt
- Biomolecular Architecture, KU Leuven Department of Chemistry Celestijnenlaan 200F 3001 Leuven Belgium
| | - Ivana Ivanović-Burmazović
- Department of Chemistry, Ludwig-Maximilian-University Butenandtstr. 5-13, Haus D 81377 Munich Germany
| | - Tatjana N Parac-Vogt
- Laboratory of Bioinorganic Chemistry, KU Leuven Department of Chemistry Celestijnenlaan 200F 3001 Leuven Belgium
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30
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Liu C, Zhao R, Song L, Li Z, Tian G, He Y, Van Meervelt L, Peshkov VA, Van der Eycken EV. Palladium-catalyzed post-Ugi arylative dearomatization/Michael addition cascade towards plicamine analogues. Org Biomol Chem 2021; 19:9752-9757. [PMID: 34730164 DOI: 10.1039/d1ob01805a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A palladium-catalyzed intramolecular cyclization of Ugi-adducts via a cascade dearomatization/aza-Michael addition process has been developed. Diverse plicamine analogues are constructed in a rapid, highly efficient and step-economical manner, through the combination of an Ugi-4CR and a palladium-catalyzed dearomatization. The synthetic utility of this approach is illustrated by further functional group transformations.
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Affiliation(s)
- Chao Liu
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F, 3001, Leuven, Belgium.
| | - Ruiqi Zhao
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F, 3001, Leuven, Belgium.
| | - Liangliang Song
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, China.
| | - Zhenghua Li
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F, 3001, Leuven, Belgium.
| | - Guilong Tian
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F, 3001, Leuven, Belgium.
| | - Yi He
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F, 3001, Leuven, Belgium.
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven Celestijnenlaan 200F, 3001, Leuven, Belgium
| | - Vsevolod A Peshkov
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Dushu Lake Campus, Suzhou 215123, China.,Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Ave, Nur-Sultan 010000, Republic of Kazakhstan
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F, 3001, Leuven, Belgium. .,Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya Street 6, Moscow, 117198, Russia
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31
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Abad N, Chkirate K, Al-Ostoot FH, Van Meervelt L, Lahmidi S, Ferfra S, Ramli Y, Essassi EM. Crystal structure, Hirshfeld surface analysis and density functional theory study of 1-nonyl-3-phenyl-quinoxalin-2-one. Acta Crystallogr E Crystallogr Commun 2021; 77:1037-1042. [PMID: 34667634 PMCID: PMC8491532 DOI: 10.1107/s2056989021009737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 09/17/2021] [Indexed: 11/15/2022]
Abstract
In the title mol-ecule, C23H28N2O, the phenyl ring is inclined to the quinoxaline ring system at a dihedral angle of 20.40 (9)°. In the crystal, C-H⋯O inter-actions between neighbouring mol-ecules form chains along the a-axis direction. Hirshfeld surface analysis indicates that the most important contributions to the crystal packing are from H⋯H (70.6%), H⋯C/C⋯H (15.5%) and H⋯O/O⋯H (4.6%) inter-actions. The optimized structure calculated using density functional theory at the B3LYP/6-311 G(d,p) level is compared with the experimentally determined structure in the solid state. The calculated highest occupied mol-ecular orbital (HOMO) and lowest unoccupied mol-ecular orbital (LUMO) energy gap is 3.8904 eV. Part of the n-nonyl chain attached to one of the nitro-gen atoms of the quinoxaline ring system shows disorder and was refined with a double conformation with occupancies of 0.604 (11) and 0.396 (11).
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Affiliation(s)
- Nadeem Abad
- Laboratory of Heterocyclic Organic Chemistry URAC 21, Pharmacochemistry Competence Center, Av. Ibn Battouta, BP 1014, Faculty of Sciences, Mohammed V University, Rabat, Morocco
- Department of Biochemistry, Faculty of Education & Science, AlBaydha University, Yemen
| | - Karim Chkirate
- Laboratory of Heterocyclic Organic Chemistry URAC 21, Pharmacochemistry Competence Center, Av. Ibn Battouta, BP 1014, Faculty of Sciences, Mohammed V University, Rabat, Morocco
| | - Fares Hezam Al-Ostoot
- Department of Biochemistry, Faculty of Education & Science, AlBaydha University, Yemen
| | - Luc Van Meervelt
- KU Leuven, Chemistry Department, Celestijnenlaan 200F box 2404, Leuven (Heverlee), B-3001, Belgium
| | - Sanae Lahmidi
- Laboratory of Heterocyclic Organic Chemistry URAC 21, Pharmacochemistry Competence Center, Av. Ibn Battouta, BP 1014, Faculty of Sciences, Mohammed V University, Rabat, Morocco
| | - Souad Ferfra
- Laboratory of Heterocyclic Organic Chemistry URAC 21, Pharmacochemistry Competence Center, Av. Ibn Battouta, BP 1014, Faculty of Sciences, Mohammed V University, Rabat, Morocco
| | - Youssef Ramli
- Laboratory of Medicinal Chemistry, Drug Sciences Research Center, Faculty of, Medicine and Pharmacy, Mohammed V University in Rabat, Morocco
| | - El Mokhtar Essassi
- Laboratory of Heterocyclic Organic Chemistry URAC 21, Pharmacochemistry Competence Center, Av. Ibn Battouta, BP 1014, Faculty of Sciences, Mohammed V University, Rabat, Morocco
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32
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Bui TYH, Moeyaert B, Pecqueur L, Srinivasu B, Economou A, Fontecave M, Dedecker P, Van Meervelt L. Structural evidence for the bleaching caused by oxygen in rsCherry. Acta Crystallogr A Found Adv 2021. [DOI: 10.1107/s0108767321093429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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33
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Liu C, Song L, Van Meervelt L, Van der Eycken EV. Rapid construction of C4-substituted phenanthridinones through palladium-catalyzed domino N-arylation/aryl-aryl coupling process. Molecular Catalysis 2021. [DOI: 10.1016/j.mcat.2021.111766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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34
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Vroemans R, Ribone SR, Thomas J, Van Meervelt L, Ollevier T, Dehaen W. Synthesis of homochiral sulfanyl- and sulfoxide-substituted naphthyltriazoles and study of the conformational stability. Org Biomol Chem 2021; 19:6521-6526. [PMID: 34254109 DOI: 10.1039/d1ob00784j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The preparation of a series of novel homochiral atropisomeric sulfanyl- and sulfoxide-substituted naphthyltriazoles is described. The triazolization methodology used presents a new way towards novel and highly stable 1,2,3-triazole-based atropisomers, and introduces a new and complementary synthetic pathway towards 4-sulfanyl substituted 1,2,3-triazoles. Starting from sulfanyl-substituted naphthyl ketones, enantiopure amines, and 4-nitrophenyl azide, a collection of 16 sulfanyl-substituted naphthyltriazoles were obtained via the triazolization reaction in which the homochiral diastereomers are readily isolated. Subsequent monooxidation results in the preparation of several sulfoxide-substituted naphthyltriazoles. The absolute configuration of a set of diastereomeric sulfanyl- and sulfoxide-appended naphthyltriazoles was deduced via X-ray crystallography. Furthermore, the conformational stability of the atropisomers was determined experimentally, and further confirmed and analyzed with the aid of computational DFT calculations.
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Affiliation(s)
- Robby Vroemans
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
| | - Sergio R Ribone
- Unidad de Investigación y Desarrollo en Tecnología Farmacéutica (UNITEFA, CONICET), Dpto. Ciencias Farmacéuticas, Fac. Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba X5000HUA, Argentina
| | - Joice Thomas
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
| | - Luc Van Meervelt
- Biochemistry, Molecular and Structural Biology, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Thierry Ollevier
- Département de chimie, Pavillon Alexandre-Vachon, Université Laval, 1045 avenue de la Médecine, Québec, QC G1V 0A6, Canada
| | - Wim Dehaen
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.
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35
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Liu C, Song L, Van Meervelt L, Peshkov VA, Li Z, Van der Eycken EV. Palladium-Catalyzed Arylative Dearomatization and Subsequent Aromatization/Dearomatization/Aza-Michael Addition: Access to Zephycarinatine and Zephygranditine Skeletons. Org Lett 2021; 23:5065-5070. [PMID: 34115493 DOI: 10.1021/acs.orglett.1c01590] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We have developed a novel palladium-catalyzed arylative dearomatization and subsequent aromatization/dearomatization/aza-Michael addition process of Ugi adducts, enabling the rapid construction of diverse zephycarinatine and zephygranditine scaffolds containing two adjacent quaternary carbon stereocenters with excellent chemoselectivity and stereoselectivity in a rapid, step-economical, and highly efficient manner. This approach shows broad substrate scope and excellent functional-group tolerance with diverse electron-rich and electron-deficient aromatic substrates. The synthetic utility of this method is further demonstrated by versatile transformations of the products.
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Affiliation(s)
- Chao Liu
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Liangliang Song
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Jiangsu Key Lab of Biomass-Based Green Fuels and Chemicals, International Innovation Center for Forest Chemicals and Materials, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, China
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Vsevolod A Peshkov
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Dushu Lake Campus, Suzhou 215123, P.R. China.,Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Ave, Nur-Sultan 010000, Republic of Kazakhstan
| | - Zhenghua Li
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.,Peoples' Friendship University of Russia (RUDN University), Miklukho-Maklaya Street 6, Moscow 117198, Russia
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36
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Vu Quoc T, Phan Thuy L, Do Ba D, Tran Thi Thuy D, Nguyen Ngoc L, Nguyen Thuy C, Duong Khanh L, Ha Manh H, Thai H, Le Van K, Van Meervelt L. Crystal structure of potassium hydrogen bis-(( E)-2-{4-[3-(thio-phen-3-yl)acrylo-yl]phen-oxy}acetate). Acta Crystallogr E Crystallogr Commun 2021; 77:609-614. [PMID: 34164137 PMCID: PMC8183452 DOI: 10.1107/s2056989021004801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2021] [Accepted: 05/06/2021] [Indexed: 11/10/2022]
Abstract
The synthesis and spectroscopic data of (E)-2-{4-[3-(thio-phen-3-yl)acrylo-yl]phen-oxy}acetic acid are described. Crystallization from an ethanol-water mixture resulted in the title compound, C30H23KO8S2 or [K(C15H11O4S)(C15H12O4S)] n , containing one mol-ecule of the acid and one mol-ecule of the potassium salt in the asymmetric unit. Both mol-ecules share the H atom between their carboxyl groups and a potassium ion. The C=C bonds display an E configuration. The thio-phene and phenyl rings in the two mol-ecules are inclined by 43.3 (2) and 22.7 (2)°. The potassium ion is octa-hedrally coordinated by six O atoms. This distorted octa-hedron shares on opposite sides two oxygen atoms with inversion-related octa-hedra, resulting in chains of octa-hedra running in the [010] direction, which form ladder-like chains by C-H⋯π inter-actions. A Hirshfeld surface analysis indicates that the highest contributions to the surface contacts arise from inter-actions in which H atoms are involved, with the most important contribution being from H⋯H (31.6 and 31.9% for the two mol-ecules) inter-actions.
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Affiliation(s)
- Trung Vu Quoc
- Faculty of Chemistry, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi 10000, Vietnam
| | - Linh Phan Thuy
- High School for Gifted Students, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi 10000, Vietnam
| | - Dai Do Ba
- Nguyen Trai High School, 50 Nam Cao Street, Ba Dinh, Hanoi 10000, Vietnam
| | - Duong Tran Thi Thuy
- Bien Hoa Gifted High School, 86 Chu Van An Street, Phu Ly City, Ha Nam Province, Vietnam
| | - Linh Nguyen Ngoc
- Faculty of Training Bachelor of Practice, Than Do University, Kim Chung, Hoai Duc, Hanoi 10000, Vietnam
| | - Chinh Nguyen Thuy
- Institute of Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10000, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10000, Vietnam
| | - Linh Duong Khanh
- Faculty of Chemistry, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi 10000, Vietnam
| | - Hung Ha Manh
- Faculty of General Education, Hanoi University of Mining and Geology, Duc Thang Ward, Bac Tu Liem District, Hanoi 10000, Vietnam
| | - Hoang Thai
- Institute of Tropical Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10000, Vietnam
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Hanoi 10000, Vietnam
| | - Khoe Le Van
- Faculty of Natural Sciences, Hong Duc University, 565 Quang Trung, Dong Ve Ward, Thanh Hoa City, Vietnam
| | - Luc Van Meervelt
- Department of Chemistry, KU Leuven, Biomolecular Architecture, Celestijnenlaan 200F, Leuven (Heverlee), B-3001, Belgium
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37
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Chen S, Oliva M, Van Meervelt L, Van der Eycken EV, Sharma UK. Palladium‐Catalyzed Domino Synthesis of 2,3‐Difunctionalized Indoles
via
Migratory Insertion of Isocyanides in Batch and Continuous Flow. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100339] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Su Chen
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry University of Leuven (KU Leuven) Celestijnenlaan 200F B-3001 Leuven Belgium
| | - Monica Oliva
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry University of Leuven (KU Leuven) Celestijnenlaan 200F B-3001 Leuven Belgium
| | - Luc Van Meervelt
- Biomolecular Architecture Department of Chemistry KU Leuven Celestijnenlaan 200F B-3001 Leuven Belgium
| | - Erik V. Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry University of Leuven (KU Leuven) Celestijnenlaan 200F B-3001 Leuven Belgium
- Peoples' Friendship University of Russia (RUDN University) Miklukho-Maklaya street 6 RU-117198 Moscow Russia
| | - Upendra K. Sharma
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry University of Leuven (KU Leuven) Celestijnenlaan 200F B-3001 Leuven Belgium
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38
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Song L, Ojeda‐Carralero GM, Parmar D, González‐Martínez DA, Van Meervelt L, Van der Eycken J, Goeman J, Rivera DG, Van der Eycken EV. Chemoselective Peptide Backbone Diversification and Bioorthogonal Ligation by Ruthenium‐Catalyzed C−H Activation/Annulation. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100323] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Liangliang Song
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Gerardo M. Ojeda‐Carralero
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
- Center for Natural Product Research Faculty of Chemistry University of Havana Zapata y G 10400 Havana Cuba
| | - Divyaakshar Parmar
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - David A. González‐Martínez
- Center for Natural Product Research Faculty of Chemistry University of Havana Zapata y G 10400 Havana Cuba
| | - Luc Van Meervelt
- Biomolecular Architecture Department of Chemistry KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Johan Van der Eycken
- Laboratory for Organic and Bio-Organic Synthesis Department of Organic and Macromolecular Chemistry Ghent University Krijgslaan 281 (S.4) B-9000 Ghent Belgium
| | - Jan Goeman
- Laboratory for Organic and Bio-Organic Synthesis Department of Organic and Macromolecular Chemistry Ghent University Krijgslaan 281 (S.4) B-9000 Ghent Belgium
| | - Daniel G. Rivera
- Center for Natural Product Research Faculty of Chemistry University of Havana Zapata y G 10400 Havana Cuba
| | - Erik V. Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
- Peoples' Friendship University of Russia (RUDN University) Miklukho-Maklaya Street 6 Moscow 117198 Russia
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39
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De Zitter E, Hugelier S, Duwé S, Vandenberg W, Tebo AG, Van Meervelt L, Dedecker P. Structure-Function Dataset Reveals Environment Effects within a Fluorescent Protein Model System*. Angew Chem Int Ed Engl 2021; 60:10073-10081. [PMID: 33543524 DOI: 10.1002/anie.202015201] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 11/13/2020] [Indexed: 11/05/2022]
Abstract
Anisotropic environments can drastically alter the spectroscopy and photochemistry of molecules, leading to complex structure-function relationships. We examined this using fluorescent proteins as easy-to-modify model systems. Starting from a single scaffold, we have developed a range of 27 photochromic fluorescent proteins that cover a broad range of spectroscopic properties, including the determination of 43 crystal structures. Correlation and principal component analysis confirmed the complex relationship between structure and spectroscopy, but also allowed us to identify consistent trends and to relate these to the spatial organization. We find that changes in spectroscopic properties can come about through multiple underlying mechanisms, of which polarity, hydrogen bonding and presence of water molecules are key modulators. We anticipate that our findings and rich structure/spectroscopy dataset can open opportunities for the development and evaluation of new and existing protein engineering methods.
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Affiliation(s)
- Elke De Zitter
- Department of Chemistry, KU Leuven, Celestijnenlaan 200G - box 2403, 3001, Leuven, Belgium.,Present address: University Grenoble Alpes, CEA, CNRS, IBS, 71 Avenue des Martyrs, 38000, Grenoble, France
| | - Siewert Hugelier
- Department of Chemistry, KU Leuven, Celestijnenlaan 200G - box 2403, 3001, Leuven, Belgium
| | - Sam Duwé
- Department of Chemistry, KU Leuven, Celestijnenlaan 200G - box 2403, 3001, Leuven, Belgium.,Present address: Advanced Optical Microscopy Centre, Hasselt University, Agoralaan building C, 3590, Diepenbeek, Belgium
| | - Wim Vandenberg
- Department of Chemistry, KU Leuven, Celestijnenlaan 200G - box 2403, 3001, Leuven, Belgium
| | - Alison G Tebo
- Janelia Research Campus, Howard Hughes Medical Institute, 19700 Helix Drive, Ashburn, Virginia, 20147, USA
| | - Luc Van Meervelt
- Department of Chemistry, KU Leuven, Celestijnenlaan 200G - box 2403, 3001, Leuven, Belgium
| | - Peter Dedecker
- Department of Chemistry, KU Leuven, Celestijnenlaan 200G - box 2403, 3001, Leuven, Belgium
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40
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Idrissi A, Chkirate K, Abad N, Djerrari B, Achour R, Essassi EM, Van Meervelt L. Crystal structure, Hirshfeld surface analysis and density functional theory study of 6-methyl-2-[(5-methyl-isoxazol-3-yl)meth-yl]-1 H-benzimidazole. Acta Crystallogr E Crystallogr Commun 2021; 77:396-401. [PMID: 33936764 PMCID: PMC8025869 DOI: 10.1107/s2056989021002723] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 02/25/2021] [Accepted: 03/12/2021] [Indexed: 11/10/2022]
Abstract
In the title mol-ecule, C13H13N3O, the isoxazole ring is inclined to the benzimidazole ring at a dihedral angle of 69.28 (14)°. In the crystal, N-H⋯N hydrogen bonds between neighboring benzimidazole rings form chains along the a-axis direction. Hirshfeld surface analysis indicates that the most important contributions to the crystal packing are from H⋯H (48.8%), H⋯C/C⋯H (20.9%) and H⋯N/N⋯H (19.3%) inter-actions. The optimized structure calculated using density functional theory at the B3LYP/6-311 G(d,p) level is compared with the experimentally determined structure in the solid state. The calculated highest occupied mol-ecular orbital (HOMO) and lowest unoccupied mol-ecular orbital (LUMO) energy gap is 4.9266 eV.
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Affiliation(s)
- Ahlam Idrissi
- Laboratory of Heterocyclic Organic Chemistry URAC 21, Pharmacochemistry Competence Center, Av. Ibn Battouta, BP 1014, Faculty of Sciences, Mohammed V University, Rabat, Morocco
| | - Karim Chkirate
- Laboratory of Heterocyclic Organic Chemistry URAC 21, Pharmacochemistry Competence Center, Av. Ibn Battouta, BP 1014, Faculty of Sciences, Mohammed V University, Rabat, Morocco
| | - Nadeem Abad
- Department of Biochemistry, Faculty of Education & Science, Al-Baydha University, Yemen
| | - Bahia Djerrari
- Laboratory of Heterocyclic Organic Chemistry URAC 21, Pharmacochemistry Competence Center, Av. Ibn Battouta, BP 1014, Faculty of Sciences, Mohammed V University, Rabat, Morocco
| | - Redouane Achour
- Laboratory of Heterocyclic Organic Chemistry URAC 21, Pharmacochemistry Competence Center, Av. Ibn Battouta, BP 1014, Faculty of Sciences, Mohammed V University, Rabat, Morocco
| | - El Mokhtar Essassi
- Laboratory of Heterocyclic Organic Chemistry URAC 21, Pharmacochemistry Competence Center, Av. Ibn Battouta, BP 1014, Faculty of Sciences, Mohammed V University, Rabat, Morocco
| | - Luc Van Meervelt
- KU Leuven, Chemistry Department, Celestijnenlaan 200F box 2404, Leuven, (Heverlee), B-3001, Belgium
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41
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De Zitter E, Hugelier S, Duwé S, Vandenberg W, Tebo AG, Van Meervelt L, Dedecker P. Structure–Function Dataset Reveals Environment Effects within a Fluorescent Protein Model System**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202015201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Elke De Zitter
- Department of Chemistry KU Leuven Celestijnenlaan 200G – box 2403 3001 Leuven Belgium
- Present address: University Grenoble Alpes CEA CNRS IBS 71 Avenue des Martyrs 38000 Grenoble France
| | - Siewert Hugelier
- Department of Chemistry KU Leuven Celestijnenlaan 200G – box 2403 3001 Leuven Belgium
| | - Sam Duwé
- Department of Chemistry KU Leuven Celestijnenlaan 200G – box 2403 3001 Leuven Belgium
- Present address: Advanced Optical Microscopy Centre Hasselt University Agoralaan building C 3590 Diepenbeek Belgium
| | - Wim Vandenberg
- Department of Chemistry KU Leuven Celestijnenlaan 200G – box 2403 3001 Leuven Belgium
| | - Alison G. Tebo
- Janelia Research Campus Howard Hughes Medical Institute 19700 Helix Drive Ashburn Virginia 20147 USA
| | - Luc Van Meervelt
- Department of Chemistry KU Leuven Celestijnenlaan 200G – box 2403 3001 Leuven Belgium
| | - Peter Dedecker
- Department of Chemistry KU Leuven Celestijnenlaan 200G – box 2403 3001 Leuven Belgium
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42
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Song L, Manno R, Ranjan P, Sebastian V, Irusta S, Mallada R, Van Meervelt L, Santamaria J, Van der Eycken EV. Preparation of Cu cluster catalysts by simultaneous cooling-microwave heating: application in radical cascade annulation. Nanoscale Adv 2021; 3:1087-1095. [PMID: 36133300 PMCID: PMC9417637 DOI: 10.1039/d0na00980f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 01/09/2021] [Indexed: 06/16/2023]
Abstract
One of the hallmarks of microwave irradiation is its selective heating mechanism. In the past 30 years, alternative designs of chemical reactors have been introduced, where the microwave (MW) absorber occupies a limited reactor volume but the surrounding environment is MW transparent. This advantage results in a different heating profile or even the possibility to quickly cool down the system. Simultaneous cooling-microwave heating has been largely adopted for organic chemical transformations. However, to the best of our knowledge there are no reports of its application in the field of nanocluster synthesis. In this work, we propose an innovative one-pot procedure for the synthesis of Cu nanoclusters. The cluster nucleation was selectively MW-activated inside the pores of a highly ordered mesoporous substrate. Once the nucleation event occurred, the crystallization reaction was instantaneously quenched, precluding the growth events and favoring the production of Cu clusters with a homogenous size distribution. Herein, we demonstrated that Cu nanoclusters could be successfully adopted for radical cascade annulations of N-alkoxybenzamides, resulting in various tricyclic and tetracyclic isoquinolones, which are widely present in lots of natural products and bioactive compounds. Compared to reported homogeneous methods, supported Cu nanoclusters provide a better platform for a green, sustainable and efficient heterogeneous approach for the synthesis of tricyclic and tetracyclic isoquinolones, avoiding a variety of toxic waste/byproducts and metal contamination in the final products.
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Affiliation(s)
- Liangliang Song
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Roberta Manno
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza Zaragoza 50009 Spain
- Department of Chemical & Environmental Engineering, Edificio I+D+i Campus Rio Ebro, C/MarianoEsquillor s/n 50018 Zaragoza Spain
| | - Prabhat Ranjan
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Victor Sebastian
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza Zaragoza 50009 Spain
- Department of Chemical & Environmental Engineering, Edificio I+D+i Campus Rio Ebro, C/MarianoEsquillor s/n 50018 Zaragoza Spain
- Networking Research Center CIBER-BBN 28029 Madrid Spain
| | - Silvia Irusta
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza Zaragoza 50009 Spain
- Department of Chemical & Environmental Engineering, Edificio I+D+i Campus Rio Ebro, C/MarianoEsquillor s/n 50018 Zaragoza Spain
- Networking Research Center CIBER-BBN 28029 Madrid Spain
| | - Reyes Mallada
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza Zaragoza 50009 Spain
- Department of Chemical & Environmental Engineering, Edificio I+D+i Campus Rio Ebro, C/MarianoEsquillor s/n 50018 Zaragoza Spain
- Networking Research Center CIBER-BBN 28029 Madrid Spain
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Jesús Santamaria
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza Zaragoza 50009 Spain
- Department of Chemical & Environmental Engineering, Edificio I+D+i Campus Rio Ebro, C/MarianoEsquillor s/n 50018 Zaragoza Spain
- Networking Research Center CIBER-BBN 28029 Madrid Spain
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
- Peoples' Friendship University of Russia (RUDN University) Miklukho-Maklaya Street 6 Moscow 117198 Russia
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43
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Nguyen Tien C, Vu Quoc T, Nguyen Dang D, Le Duc G, Van Meervelt L. Synthesis and structure of ( E)- N-(4-meth-oxy-phen-yl)-2-[4-(3-oxo-3-phenyl-prop-1-en-1-yl)phen-oxy]acetamide. Acta Crystallogr E Crystallogr Commun 2021; 77:184-189. [PMID: 33614151 PMCID: PMC7869538 DOI: 10.1107/s2056989021000864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 01/25/2021] [Indexed: 11/23/2022]
Abstract
The title compound N-(4-meth-oxy-phen-yl)-2-[4-(3-oxo-3-phenyl-prop-1-en-1-yl)phen-oxy]acetamide, C24H21NO4, was prepared from reaction of N-(4-meth-oxy-phen-yl)-2-chloro-acetamide and (E)-3-(4-hy-droxy-phen-yl)-1-phenyl-prop-2-en-1-one, which was obtained from the reaction of 4-hy-droxy-benzaldehyde and aceto-phenone. The structure of the title compound was determined by IR, 1H-NMR, 13C-NMR and HR-MS spectroscopic data and further characterized by single-crystal X-ray diffraction. The asymmetric unit contains four mol-ecules, each displaying an E-configuration of the C=C bond. The dihedral angle between the phenyl rings in each mol-ecule varies between 14.9 (2) and 45.8 (2)°. In the crystal, C-H⋯O hydrogen-bonding inter-actions link the mol-ecules into chains running along the [001] direction. In addition, C-H⋯π inter-actions further stabilize the crystal packing. A Hirshfeld analysis indicates that the most important contributions to the surface contacts are from H⋯H (43.6%), C⋯H/H⋯C (32.1%) and O⋯H/H⋯O (18.1%) inter-actions.
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Affiliation(s)
- Cong Nguyen Tien
- Faculty of Chemistry, Ho Chi Minh City University of Education, 280 An Duong Vuong Street, Ho Chi Minh City, 72711, Vietnam
| | - Trung Vu Quoc
- Faculty of Chemistry, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi, 11310, Vietnam
| | - Dat Nguyen Dang
- Faculty of Chemistry, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi, 11310, Vietnam
| | - Giang Le Duc
- School of Natural Sciences Education, Vinh University, 182 Le Duan Street, Vinh City, 43000, Vietnam
| | - Luc Van Meervelt
- Department of Chemistry, KU Leuven, Biomolecular Architecture, Celestijnenlaan 200F, Leuven (Heverlee), B-3001, Belgium
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44
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Arhangelskis M, Van Meervelt L, Dobrzańska L. Influence of ligand composition on crystal structure formation – isostructurality and morphotropism. CrystEngComm 2021. [DOI: 10.1039/d0ce01302a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The replacement of an H-atom with a Me-group leads to the isostructurality of polymeric Ag(i) complexes, whereas it causes morphotropic adjustments in the parent ligands (discrete molecules).
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Affiliation(s)
| | - Luc Van Meervelt
- Biomolecular Architecture
- Department of Chemistry
- Katholieke Universiteit Leuven
- 3001 Heverlee
- Belgium
| | - Liliana Dobrzańska
- Faculty of Chemistry
- Nicolaus Copernicus University in Toruń
- 87-100 Toruń
- Poland
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45
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He Y, Song L, Liu C, Wu D, Li Z, Van Meervelt L, Van der Eycken EV. Access to Polycyclic Azepino[5,4,3- cd]indoles via a Gold-Catalyzed Post-Ugi Dearomatization Cascade. J Org Chem 2020; 85:15092-15103. [PMID: 33200934 DOI: 10.1021/acs.joc.0c01972] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The development of a rapid and diverse access to complex natural product-like 3,4-fused indole scaffolds has always attracted considerable attention from synthetic and medicinal communities. We herein disclose a modular and straightforward protocol to prepare the densely substituted polycyclic azepino[5,4,3-cd]indole scaffolds. This synthetic process involves an Ugi four-component reaction from easily available starting materials and a gold-catalyzed post-Ugi domino dearomatization/Michael addition sequence, enabling facile access to the highly functionalized azepino[5,4,3-cd]indole core with excellent chemo-, regio-, and diastereoselectivity.
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Affiliation(s)
- Yi He
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Liangliang Song
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Chao Liu
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Danjun Wu
- College of Pharmaceutical Science, Zhejiang University of Technology, 18 Chaowang Road, 310014 Hangzhou, China
| | - Zhenghua Li
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium.,Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, 117198 Moscow, Russia
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Le THH, Nguyen TNV, Ngo TC, Le VC, Bui TYH, Da Tran T, Nguyen HD, Van Meervelt L. Synthesis, Crystal Structures, Fluorescence and Quantum Chemical Investigations of some Multi-Substituted Quinoline Derivatives. J Fluoresc 2020; 31:195-208. [PMID: 33200376 DOI: 10.1007/s10895-020-02648-2] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 11/05/2020] [Indexed: 11/30/2022]
Abstract
Starting from eugenol (4-allyl-2-methoxyphenol) three new quinoline derivatives, namely 5-bromo-7-(carboxymethoxy)-6-hydroxy-1-methylquinolin-1-ium-3-sulfonate (Q2, C12H10BrNO7S), 5-amino-7-(carboxymethoxy)-6-hydroxyquinolin-1-ium-3-sulfonate (Q4, C11H10N2O7S) and 7-(carboxymethoxy)-5,6-dihydroxylquinolin-1-ium-3-sulfonate (Q6, C11H9NO8), have been synthesized and crystallised as dihydrate. The best planes through the quinoline ring and the carboxymethoxy substituent is 6.60 (14), 7.28 (6) and 4.73 (7)° for Q2, Q4 and Q6, respectively. The crystal packing of Q2 is characterised by O-H…O, π …π and Br …pyridine interactions. The two water molecules bridge three sulphate groups. Infinite chains of Q4 running in the direction [021] are formed by O/N-H …O hydrogen bonds at both ends of the molecule. Parallel chains interact by O/N-H…O hydrogen bonds and π…π and C=O…phenyl stacking. The -NH2 substituent bridges two sulphate groups, while the two water molecules bridge the other functional groups. The packing of Q6 consists of sheets of molecules interaction through O/N-H…O hydrogen bonds while the two water molecules bridge all function groups present. Parallel sheets interact through π…π and C=O…pyridine stacking. An aqueous solution of Q2 and its precursor 7-(carboxymethoxy)-6-hydroxyquinolin-1-ium-3-sulfonate (Q) exhibits fluorescence which is pH dependent. The fluorescence intensity of a 10 μM solution of Q containing Zn2+ reaches its maximum for a [Zn2+]:[Q] ratio of 1:1. The fluorescence properties of Q, Q2, Q4 and Q6 were further investigated by DFT calculation methods.
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Affiliation(s)
- Thi Hong Hai Le
- Department of Chemistry, Hanoi National University of Education, 136 Xuan Thuy - Cau Giay, Hanoi, Vietnam.
| | - Thi Ngoc Vinh Nguyen
- Department of Science, Hong Duc University, 565 Quang Trung- Tan Son, Thanh Hoa, Vietnam
| | - Tuan Cuong Ngo
- Department of Chemistry, Hanoi National University of Education, 136 Xuan Thuy - Cau Giay, Hanoi, Vietnam
| | - Van Co Le
- Department of Chemistry, Hanoi National University of Education, 136 Xuan Thuy - Cau Giay, Hanoi, Vietnam
| | - Thi Yen Hang Bui
- Department of Chemistry, Hanoi National University of Education, 136 Xuan Thuy - Cau Giay, Hanoi, Vietnam
| | - Thi Da Tran
- Department of Chemistry, Hanoi National University of Education, 136 Xuan Thuy - Cau Giay, Hanoi, Vietnam
| | - Huu Dinh Nguyen
- Department of Chemistry, Hanoi National University of Education, 136 Xuan Thuy - Cau Giay, Hanoi, Vietnam
| | - Luc Van Meervelt
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, PO box 2404, 3001, Leuven (Heverlee), Belgium.
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Tian G, Song L, Li Z, Robeyns K, Van Meervelt L, Van der Eycken EV. A Gold(I)-Catalyzed Hydroamination/Cycloisomerization Cascade: Concise Synthesis of (±)-seco-Antofine and (±)-Septicine. Org Lett 2020; 22:8441-8445. [DOI: 10.1021/acs.orglett.0c03062] [Citation(s) in RCA: 11] [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] [Indexed: 11/28/2022]
Affiliation(s)
- Guilong Tian
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Liangliang Song
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Zhenghua Li
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Koen Robeyns
- IMCN, Molecules Solids and Reactivity division (MOST), Université Catholique de Louvain, Place Pasteur 1, B-1348 Louvain-la-Neuve, Belgium
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Erik V. Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry, KU Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
- Peoples’ Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow 117198, Russia
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48
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Chen S, Ranjan P, Ramkumar N, Van Meervelt L, Van der Eycken EV, Sharma UK. Ligand‐Enabled Palladium‐Catalyzed Through‐Space C−H Bond Activation via a Carbopalladation/1,4‐Pd Migration/C−H Functionalization Sequence. Chemistry 2020; 26:14075-14079. [DOI: 10.1002/chem.202001582] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Indexed: 12/27/2022]
Affiliation(s)
- Su Chen
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry University of Leuven (KU Leuven) Celestijnenlaan 200F 3001 Leuven Belgium
| | - Prabhat Ranjan
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry University of Leuven (KU Leuven) Celestijnenlaan 200F 3001 Leuven Belgium
| | - Nagarajan Ramkumar
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry University of Leuven (KU Leuven) Celestijnenlaan 200F 3001 Leuven Belgium
| | - Luc Van Meervelt
- Biomolecular Architecture Department of Chemistry KU Leuven Celestijnenlaan 200F 3001 Leuven Belgium
| | - Erik V. Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry University of Leuven (KU Leuven) Celestijnenlaan 200F 3001 Leuven Belgium
- Peoples' Friendship University of Russia (RUDN University) Miklukho-Maklaya Street 6 117198 Moscow Russia
| | - Upendra K. Sharma
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry University of Leuven (KU Leuven) Celestijnenlaan 200F 3001 Leuven Belgium
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49
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Song L, Zhang X, Tang X, Van Meervelt L, Van der Eycken J, Harvey JN, Van der Eycken EV. Ruthenium-catalyzed cascade C-H activation/annulation of N-alkoxybenzamides: reaction development and mechanistic insight. Chem Sci 2020; 11:11562-11569. [PMID: 34094402 PMCID: PMC8162874 DOI: 10.1039/d0sc04434b] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
A highly selective ruthenium-catalyzed C–H activation/annulation of alkyne-tethered N-alkoxybenzamides has been developed. In this reaction, diverse products from inverse annulation can be obtained in moderate to good yields with high functional group compatibility. Insightful experimental and theoretical studies indicate that the reaction to the inverse annulation follows the Ru(ii)–Ru(iv)–Ru(ii) pathway involving N–O bond cleavage prior to alkyne insertion. This is highly different compared to the conventional mechanism of transition metal-catalyzed C–H activation/annulation with alkynes, involving alkyne insertion prior to N–O bond cleavage. Via this pathway, the in situ generated acetic acid from the N–H/C–H activation step facilitates the N–O bond cleavage to give the Ru-nitrene species. Besides the conventional mechanism forming the products via standard annulation, an alternative and novel Ru(ii)–Ru(iv)–Ru(ii) mechanism featuring N–O cleavage preceding alkyne insertion has been proposed, affording a new understanding of transition metal-catalyzed C–H activation/annulation. A highly selective ruthenium-catalyzed C–H activation/annulation through a pathway involving N–O bond cleavage prior to alkyne insertion is developed.![]()
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Affiliation(s)
- Liangliang Song
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F Leuven 3001 Belgium
| | - Xiaoyong Zhang
- Theoretical and Computational Chemistry, Department of Chemistry, KU Leuven Celestijnenlaan 200F Leuven 3001 Belgium
| | - Xiao Tang
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology Gardens Point Campus Brisbane QLD 4001 Australia
| | - Luc Van Meervelt
- Biomolecular Architecture, Department of Chemistry, KU Leuven Celestijnenlaan 200F Leuven 3001 Belgium
| | - Johan Van der Eycken
- Laboratory for Organic and Bio-Organic Synthesis, Department of Organic and Macromolecular Chemistry, Ghent University Krijgslaan 281 (S.4) B-9000 Ghent Belgium
| | - Jeremy N Harvey
- Theoretical and Computational Chemistry, Department of Chemistry, KU Leuven Celestijnenlaan 200F Leuven 3001 Belgium
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, KU Leuven Celestijnenlaan 200F Leuven 3001 Belgium .,Peoples' Friendship University of Russia (RUDN University) Miklukho-Maklaya Street 6 Moscow 117198 Russia
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50
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Cong NT, Trang HTX, Dung PD, Phuong TH, Trung VQ, Dat ND, Anh DTT, Tuyen NV, Van Meervelt L. Synthesis, structure and in vitro cytotoxicity testing of some 2-aroylbenzofuran-3-ols. Acta Crystallogr C Struct Chem 2020; 76:874-882. [PMID: 32887858 DOI: 10.1107/s2053229620011018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 08/11/2020] [Indexed: 11/10/2022]
Abstract
Five 2-aroyl-5-bromobenzo[b]furan-3-ol compounds (two of which are new) and four new 2-aroyl-5-iodobenzo[b]furan-3-ol compounds were synthesized starting from salicylic acid. The compounds were characterized by mass spectrometry and 1H NMR and 13C NMR spectroscopy. Single-crystal X-ray diffraction studies of four compounds, namely, (5-bromo-3-hydroxybenzofuran-2-yl)(4-fluorophenyl)methanone, C15H8BrFO3, (5-bromo-3-hydroxybenzofuran-2-yl)(4-chlorophenyl)methanone, C15H8BrClO3, (5-bromo-3-hydroxybenzofuran-2-yl)(4-bromophenyl)methanone, C15H8Br2O3, and (4-bromophenyl)(3-hydroxy-5-iodobenzofuran-2-yl)methanone, C15H8BrIO3, were also carried out. The compounds were tested for their in vitro cytotoxicity on the four human cancer cell lines KB, Hep-G2, Lu-1 and MCF7. Six compounds show good inhibiting abilities on Hep-G2 cells, with IC50 values of 1.39-8.03 µM.
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Affiliation(s)
- Nguyen Tien Cong
- Faculty of Chemistry, Ho Chi Minh City University of Education, 280 An Duong Vuong Street, District No. 5, Ho Chi Minh City, Vietnam
| | - Huynh Thi Xuan Trang
- Faculty of Chemistry, Ho Chi Minh City University of Education, 280 An Duong Vuong Street, District No. 5, Ho Chi Minh City, Vietnam
| | - Pham Duc Dung
- Faculty of Chemistry, Ho Chi Minh City University of Education, 280 An Duong Vuong Street, District No. 5, Ho Chi Minh City, Vietnam
| | - Tran Hoang Phuong
- Faculty of Chemistry, University of Sciences, Vietnam National University, 227 Nguyen Van Cu Street, District No. 5, Ho Chi Minh City 721337, Vietnam
| | - Vu Quoc Trung
- Faculty of Chemistry, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay District, Hanoi 100000, Vietnam
| | - Nguyen Dang Dat
- Faculty of Chemistry, Hanoi National University of Education, 136 Xuan Thuy, Cau Giay District, Hanoi 100000, Vietnam
| | - Dang Thi Tuyet Anh
- Institute of Chemistry, Viet Nam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay District, Hanoi 100000, Vietnam
| | - Nguyen Van Tuyen
- Institute of Chemistry, Viet Nam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay District, Hanoi 100000, Vietnam
| | - Luc Van Meervelt
- Department of Chemistry, KU Leuven, Celestijnenlaan 200F, PO box 2404, Leuven (Heverlee), B-3001, Belgium
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