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García-Arroyo P, Gala E, Martínez-Fernández M, Salagre E, Martínez JI, Michel EG, Segura JL. Turn-on Solid-State Fluorescent Determination of Zinc Ion by Quinoline-based Covalent Organic Framework. Macromol Rapid Commun 2024:e2400134. [PMID: 38689427 DOI: 10.1002/marc.202400134] [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: 03/07/2024] [Revised: 04/22/2024] [Indexed: 05/02/2024]
Abstract
A new quinoline-based COF (Covalent Organic Framework), obtained by Povarov reaction, containing 2,6-diisopropylphenyl moieties as substituents over the heterocyclic ring is described for detecting Zn2+ in aqueous solution. The introduction of the mentioned bulky phenyl rings into the network favors an increase of the distance between the reticular sheets and their arrangement, obtaining a new material with an alternating AB type stacking. The new material exhibits good selectivity to detect Zn2+ by fluorescence emission in aqueous solutions up to a concentration of 1.2 × 10ꟷ4 M of the metal ion. In order to have a deeper insight into the interaction between the COF and the zinc cation, a thorough spectroscopical, microscopical and theoretical study is also presented and discussed in this communication. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Paloma García-Arroyo
- Departamento de Química Orgánica I, Facultad de CC. Químicas, Universidad Complutense de Madrid, Madrid, 28040, Spain
| | - Elena Gala
- Departamento de Química Orgánica I, Facultad de CC. Químicas, Universidad Complutense de Madrid, Madrid, 28040, Spain
- Chemical and Environmental Technology Department, Rey Juan Carlos University, Móstoles, 28933, Spain
| | - Marcos Martínez-Fernández
- Departamento de Química Orgánica I, Facultad de CC. Químicas, Universidad Complutense de Madrid, Madrid, 28040, Spain
| | - Elena Salagre
- Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, Madrid, 28049, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Madrid, 28049, Spain
| | - José I Martínez
- Departamento de Materiales de baja dimensionalidad, Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Madrid, 28049, Spain
| | - Enrique G Michel
- Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, Madrid, 28049, Spain
- Condensed Matter Physics Center (IFIMAC), Universidad Autónoma de Madrid, Madrid, 28049, Spain
| | - José L Segura
- Departamento de Química Orgánica I, Facultad de CC. Químicas, Universidad Complutense de Madrid, Madrid, 28040, Spain
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2
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Zhao C, Li Y, Wang Y, Zeng Y. Cationic Hypervalent Chalcogen Bond Catalysis on the Povarov Reaction: Reactivity and Stereoselectivity. Chemistry 2024; 30:e202400555. [PMID: 38372453 DOI: 10.1002/chem.202400555] [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: 02/09/2024] [Accepted: 02/19/2024] [Indexed: 02/20/2024]
Abstract
Chalcogen bond catalysis, particularly cationic hypervalent chalcogen bond catalysis, is considered to be an effective strategy for organocatalysis. In this work, the cationic hypervalent chalcogen bond catalysis for the Povarov reaction between N-benzylideneaniline and ethyl vinyl ether was investigated by density functional theory (DFT). The catalytic reaction involves the cycloaddition process and the proton transfer process, and the rate-determining step is the cycloaddition process. Cationic hypervalent tellurium derivatives bearing CF3 and F groups exhibit superior catalytic activity. For the rate-determining step, the Gibbs free energy barrier decreases as the positive electrostatic potential of the chalcogen bond catalysts increases. More importantly, the Gibbs free energy barrier has a strong linear correlation with the electrostatic energy of the chalcogen bond in the catalyst-substrate complex. Furthermore, the catalytic reactions include the endo pathway and exo pathway. The C-H⋅⋅⋅π interaction between the substituent of the ethyl vinyl ether and the aryl ring of the N-benzylideneaniline contributes to the endo-selectivity of the reaction. This research contributes to a deeper understanding of chalcogen bond catalysis, providing insights for designing chalcogen bond catalysts with high performance.
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Affiliation(s)
- Chang Zhao
- College of Chemistry and Materials Science, Hebei Key Laboratory of Inorganic Nano-materials, Hebei Normal University, Shijiazhuang, 050024, China
| | - Ying Li
- College of Chemistry and Materials Science, Hebei Key Laboratory of Inorganic Nano-materials, Hebei Normal University, Shijiazhuang, 050024, China
| | - Yanjiang Wang
- College of Chemistry and Materials Science, Hebei Key Laboratory of Inorganic Nano-materials, Hebei Normal University, Shijiazhuang, 050024, China
| | - Yanli Zeng
- College of Chemistry and Materials Science, Hebei Key Laboratory of Inorganic Nano-materials, Hebei Normal University, Shijiazhuang, 050024, China
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3
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Debruyne M, Borgmans S, Radhakrishnan S, Breynaert E, Vrielinck H, Leus K, Laemont A, De Vos J, Rawat KS, Vanlommel S, Rijckaert H, Salemi H, Everaert J, Vanden Bussche F, Poelman D, Morent R, De Geyter N, Van Der Voort P, Van Speybroeck V, Stevens CV. Engineering of Phenylpyridine- and Bipyridine-Based Covalent Organic Frameworks for Photocatalytic Tandem Aerobic Oxidation/Povarov Cyclization. ACS Appl Mater Interfaces 2023; 15:35092-35106. [PMID: 37462114 DOI: 10.1021/acsami.3c07036] [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] [Indexed: 07/28/2023]
Abstract
Covalent organic frameworks (COFs) are emerging as a new class of photoactive organic semiconductors, which possess crystalline ordered structures and high surface areas. COFs can be tailor-made toward specific (photocatalytic) applications, and the size and position of their band gaps can be tuned by the choice of building blocks and linkages. However, many types of building blocks are still unexplored as photocatalytic moieties and the scope of reactions photocatalyzed by COFs remains quite limited. In this work, we report the synthesis and application of two bipyridine- or phenylpyridine-based COFs: TpBpyCOF and TpPpyCOF. Due to their good photocatalytic properties, both materials were applied as metal-free photocatalysts for the tandem aerobic oxidation/Povarov cyclization and α-oxidation of N-aryl glycine derivatives, with the bipyridine-based TpBpyCOF exhibiting the highest activity. By expanding the range of reactions that can be photocatalyzed by COFs, this work paves the way toward the more widespread application of COFs as metal-free heterogeneous photocatalysts as a convenient alternative for commonly used homogeneous (metal-based) photocatalysts.
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Affiliation(s)
- Maarten Debruyne
- Department of Green Chemistry and Technology, Ghent University, Coupure Links 653, Ghent 9000, Belgium
| | - Sander Borgmans
- Department of Applied Physics, Ghent University, Technologiepark 46, Zwijnaarde 9052, Belgium
| | - Sambhu Radhakrishnan
- NMR/X-ray Platform for Convergence Research (NMRCoRe) & Centre for Surface Chemistry and Catalysis: Characterisation and Application Team (COK-KAT), KU Leuven, Celestijnenlaan 200f─Box 2461, Leuven 3001, Belgium
| | - Eric Breynaert
- NMR/X-ray Platform for Convergence Research (NMRCoRe) & Centre for Surface Chemistry and Catalysis: Characterisation and Application Team (COK-KAT), KU Leuven, Celestijnenlaan 200f─Box 2461, Leuven 3001, Belgium
| | - Henk Vrielinck
- Department of Solid State Sciences, Ghent University, Krijgslaan 281 (S1), Ghent 9000, Belgium
| | - Karen Leus
- Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 (B4), Ghent 9000, Belgium
| | - Andreas Laemont
- Department of Chemistry, Ghent University, Krijgslaan 281 (S3), Ghent 9000, Belgium
| | - Juul De Vos
- Department of Applied Physics, Ghent University, Technologiepark 46, Zwijnaarde 9052, Belgium
| | - Kuber Singh Rawat
- Department of Applied Physics, Ghent University, Technologiepark 46, Zwijnaarde 9052, Belgium
| | - Siebe Vanlommel
- Department of Applied Physics, Ghent University, Technologiepark 46, Zwijnaarde 9052, Belgium
| | - Hannes Rijckaert
- Department of Chemistry, Ghent University, Krijgslaan 281 (S3), Ghent 9000, Belgium
| | - Hadi Salemi
- Department of Green Chemistry and Technology, Ghent University, Coupure Links 653, Ghent 9000, Belgium
| | - Jonas Everaert
- Department of Green Chemistry and Technology, Ghent University, Coupure Links 653, Ghent 9000, Belgium
| | - Flore Vanden Bussche
- Department of Green Chemistry and Technology, Ghent University, Coupure Links 653, Ghent 9000, Belgium
- Department of Chemistry, Ghent University, Krijgslaan 281 (S3), Ghent 9000, Belgium
| | - Dirk Poelman
- Department of Solid State Sciences, Ghent University, Krijgslaan 281 (S1), Ghent 9000, Belgium
| | - Rino Morent
- Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 (B4), Ghent 9000, Belgium
| | - Nathalie De Geyter
- Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 (B4), Ghent 9000, Belgium
| | - Pascal Van Der Voort
- Department of Chemistry, Ghent University, Krijgslaan 281 (S3), Ghent 9000, Belgium
| | | | - Christian V Stevens
- Department of Green Chemistry and Technology, Ghent University, Coupure Links 653, Ghent 9000, Belgium
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Masdeu C, de Los Santos JM, Palacios F, Alonso C. The Intramolecular Povarov Tool in the Construction of Fused Nitrogen-Containing Heterocycles. Top Curr Chem (Cham) 2023; 381:20. [PMID: 37249641 DOI: 10.1007/s41061-023-00428-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Accepted: 04/28/2023] [Indexed: 05/31/2023]
Abstract
Nitrogen heterocycles are part of the structure of natural products and agents with important biological activity, such as antiviral, antibiotic, and antitumor drugs. For this reason, heterocyclic compounds are one of today's most desirable synthetic targets and the Povarov reaction is a powerful synthetic tool for the construction of highly functionalized heterocyclic systems. This process involves an aromatic amine, a carbonyl compound, and an olefin or acetylene to give rise to the formation of a nitrogen-containing heterocycle. This review illustrates advances in the synthetic aspects of the intramolecular Povarov reaction for the construction of intricate nitrogen-containing polyheterocyclic compounds. This original review presents research done in this field, with references to important works by internationally relevant research groups on this current topic, covering the literature from 1992 to 2022. The intramolecular Povarov reactions are described here according to the key processes involved, using different combinations of aromatic or heteroaromatic amines, and aliphatic, aromatic, or heteroaromatic aldehydes. Some catalytic reactions promoted by transition metals are detailed, as well as the oxidative Povarov reaction and some asymmetric intramolecular Povarov processes.
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Affiliation(s)
- Carme Masdeu
- Departamento de Química Orgánica I, Facultad de Farmacia and Centro de Investigación Lascaray (Lascaray Research Center), Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Paseo de la Universidad 7, 01006, Vitoria-Gasteiz, Spain
| | - Jesús M de Los Santos
- Departamento de Química Orgánica I, Facultad de Farmacia and Centro de Investigación Lascaray (Lascaray Research Center), Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Paseo de la Universidad 7, 01006, Vitoria-Gasteiz, Spain
| | - Francisco Palacios
- Departamento de Química Orgánica I, Facultad de Farmacia and Centro de Investigación Lascaray (Lascaray Research Center), Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Paseo de la Universidad 7, 01006, Vitoria-Gasteiz, Spain
| | - Concepción Alonso
- Departamento de Química Orgánica I, Facultad de Farmacia and Centro de Investigación Lascaray (Lascaray Research Center), Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU), Paseo de la Universidad 7, 01006, Vitoria-Gasteiz, Spain.
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5
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Liu W, Qin T, Xie W, Zhou J, Ye Z, Yang X. Enantioselective Synthesis of Azahelicenes through Organocatalyzed Multicomponent Reactions. Angew Chem Int Ed Engl 2023:e202303430. [PMID: 37143184 DOI: 10.1002/anie.202303430] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 04/28/2023] [Accepted: 05/02/2023] [Indexed: 05/06/2023]
Abstract
We have developed an efficient modular asymmetric synthesis of azahelicenes through an organocatalyzed asymmetric multicomponent reaction from readily available polycyclic aromatic amines, aldehydes, and (di)enamides, by employing a central-to-helical chirality conversion strategy. A series of aza[5]- and aza[4]helicenes bearing various substituents were readily afforded through this one-pot sequential enantioselective Povarov reaction/oxidative aromatization process, with good yields and high enantioselectivities. The fruitful and diverse derivatizations of the chiral azahelicene products demonstrated the potential of this method, and a preliminary application of the azahelicene derivative as a chiral organocatalyst was showcased. The photophysical and chiroptical properties of these azahelicenes, particularly the acid/base-triggered switching of these properties, were also well studied, which may find potential applications in the development of novel organic optoelectronic materials.
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Affiliation(s)
- Wei Liu
- ShanghaiTech University, School of Physical Science and Technology, CHINA
| | - Tianren Qin
- ShanghaiTech University, School of Physical Science and Technology, CHINA
| | - Wansen Xie
- ShanghaiTech University, School of Physical Science and Technology, CHINA
| | - Jinmiao Zhou
- ShanghaiTech University, School of Physical Science and Technology, CHINA
| | - Zidan Ye
- ShanghaiTech University, School of Physical Science and Technology, CHINA
| | - Xiaoyu Yang
- ShanghaiTech University, School of Physical Science and Technology, 393 Middle Huaxia Road, 201210, Shanghai, CHINA
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6
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Fedotov VV, Valieva MI, Taniya OS, Aminov SV, Kharitonov MA, Novikov AS, Kopchuk DS, Slepukhin PA, Zyryanov GV, Ulomsky EN, Rusinov VL, Charushin VN. 4-(Aryl)-Benzo[4,5]imidazo[1,2- a]pyrimidine-3-Carbonitrile-Based Fluorophores: Povarov Reaction-Based Synthesis, Photophysical Studies, and DFT Calculations. Molecules 2022; 27:molecules27228029. [PMID: 36432130 PMCID: PMC9698514 DOI: 10.3390/molecules27228029] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 11/15/2022] [Accepted: 11/15/2022] [Indexed: 11/22/2022] Open
Abstract
A series of novel 4-(aryl)-benzo[4,5]imidazo[1,2-a]pyrimidine-3-carbonitriles were obtained through the Povarov (aza-Diels-Alder) and oxidation reactions, starting from benzimidazole-2-arylimines. Based on the literature data and X-ray diffraction analysis, it was discovered that during the Povarov reaction, [1,3] sigmatropic rearrangement leading to dihydrobenzimidazo[1,2-a]pyrimidines took place. The structures of all the obtained compounds were confirmed based on the data from 1H- and 13C-NMR spectroscopy, IR spectroscopy, and elemental analysis. For all the obtained compounds, their photophysical properties were studied. In all the cases, a positive emission solvatochromism with Stokes shifts from 120 to 180 nm was recorded. Aggregation-Induced Emission (AIE) has been illustrated for compound 6c using different water fractions (fw) in THF. The compounds 6c and 6f demonstrated changes in emission maxima or/and intensities after mechanical stimulation.
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Affiliation(s)
- Victor V. Fedotov
- Chemical Engineering Institute, Ural Federal University, 19 Mira St., 620002 Yekaterinburg, Russia
- Correspondence: (V.V.F.); (O.S.T.)
| | - Maria I. Valieva
- Chemical Engineering Institute, Ural Federal University, 19 Mira St., 620002 Yekaterinburg, Russia
| | - Olga S. Taniya
- Chemical Engineering Institute, Ural Federal University, 19 Mira St., 620002 Yekaterinburg, Russia
- Correspondence: (V.V.F.); (O.S.T.)
| | - Semen V. Aminov
- Chemical Engineering Institute, Ural Federal University, 19 Mira St., 620002 Yekaterinburg, Russia
| | - Mikhail A. Kharitonov
- Chemical Engineering Institute, Ural Federal University, 19 Mira St., 620002 Yekaterinburg, Russia
| | - Alexander S. Novikov
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya Nab., 199034 Saint Petersburg, Russia
| | - Dmitry S. Kopchuk
- Chemical Engineering Institute, Ural Federal University, 19 Mira St., 620002 Yekaterinburg, Russia
| | - Pavel A. Slepukhin
- Chemical Engineering Institute, Ural Federal University, 19 Mira St., 620002 Yekaterinburg, Russia
| | - Grigory V. Zyryanov
- Chemical Engineering Institute, Ural Federal University, 19 Mira St., 620002 Yekaterinburg, Russia
| | - Evgeny N. Ulomsky
- Chemical Engineering Institute, Ural Federal University, 19 Mira St., 620002 Yekaterinburg, Russia
| | - Vladimir L. Rusinov
- Chemical Engineering Institute, Ural Federal University, 19 Mira St., 620002 Yekaterinburg, Russia
| | - Valery N. Charushin
- Chemical Engineering Institute, Ural Federal University, 19 Mira St., 620002 Yekaterinburg, Russia
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Kazancioglu MZ, Quirion K, Wipf P, Skoda EM. Enantioselective synthesis and selective functionalization of 4-aminotetrahydroquinolines as novel GLP-1 secretagogues. Chirality 2022; 34:521-536. [PMID: 34964164 PMCID: PMC8837726 DOI: 10.1002/chir.23403] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Revised: 12/01/2021] [Accepted: 12/07/2021] [Indexed: 01/28/2023]
Abstract
Polysubstituted tetrahydroquinolines were obtained in moderate to high yields (28% to 92%) and enantiomeric ratios (er 89:11 to 99:1) by a three-component Povarov reaction using a chiral phosphoric acid catalyst. Significantly, post-Povarov functional group interconversions allowed a rapid access to a library of 36 enantioenriched 4-aminotetrahydroquinoline derivatives featuring five points of diversity. Selected analogs were assayed for their ability to function as glucagon-like peptide-1 (GLP-1) secretagogues.
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Affiliation(s)
- Mustafa Z. Kazancioglu
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260, USA
| | - Kevin Quirion
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260, USA
| | - Peter Wipf
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260, USA.,Department of Pharmaceutical Sciences, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Erin M. Skoda
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, PA 15260, USA
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8
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Goebel GL, Hohnen L, Borgelt L, Hommen P, Qiu X, Lightfoot H, Wu P. Small molecules with tetrahydroquinoline-containing Povarov scaffolds as inhibitors disrupting the Protein-RNA interaction of LIN28-let-7. Eur J Med Chem 2022; 228:114014. [PMID: 34883291 DOI: 10.1016/j.ejmech.2021.114014] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [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: 10/11/2021] [Revised: 11/15/2021] [Accepted: 11/24/2021] [Indexed: 12/29/2022]
Abstract
Inhibition of the RNA-binding protein LIN28 and disruption of the protein-RNA interaction of LIN28-let-7 with small molecules holds great potential to develop new anticancer therapeutics. Herein, we report the LIN28 inhibitory activities of a series of 30 small molecules with a tricyclic tetrahydroquinoline (THQ)-containing scaffold obtained from a Povarov reaction. The THQ molecules were structurally optimized by varying the 2-benzoic acid substituent, the fused ring at 3- and 4-positions, and the substituents at the phenyl moiety of the tetrahydroquinoline core. Among the tested compounds, GG-43 showed dose-dependent inhibition in an EMSA validation assay and low micromolar inhibitory activity in a fluorescence polarization-based assay measuring disruption of LIN28-let-7 interaction. Binding mode between GG-43 and the cold shock domain of LIN28 was proposed via a molecular docking analysis. The study provides one of the first systematic analyses on structural features that are required for LIN28 inhibition, and indicates the necessity to develop small molecules with new scaffolds as LIN28-targeting probes and therapeutic candidates. In parallel, this study demonstrates the polypharmacological nature of tricyclic THQ-containing scaffolds accessible through Povarov reactions.
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Affiliation(s)
- Georg L Goebel
- Chemical Genomics Centre, Max Planck Institute of Molecular Physiology, Dortmund, 44227, Germany; Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund, 44227, Germany; Faculty of Chemistry and Chemical Biology, TU Dortmund, Otto-Hahn Strasse 6, Dortmund, 44227, Germany
| | - Lisa Hohnen
- Chemical Genomics Centre, Max Planck Institute of Molecular Physiology, Dortmund, 44227, Germany; Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund, 44227, Germany; Faculty of Chemistry and Biochemistry, Ruhr-University Bochum, Universitätstr. 150, Bochum, 44780, Germany
| | - Lydia Borgelt
- Chemical Genomics Centre, Max Planck Institute of Molecular Physiology, Dortmund, 44227, Germany; Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund, 44227, Germany; Faculty of Chemistry and Chemical Biology, TU Dortmund, Otto-Hahn Strasse 6, Dortmund, 44227, Germany
| | - Pascal Hommen
- Chemical Genomics Centre, Max Planck Institute of Molecular Physiology, Dortmund, 44227, Germany; Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund, 44227, Germany; Faculty of Chemistry and Chemical Biology, TU Dortmund, Otto-Hahn Strasse 6, Dortmund, 44227, Germany
| | - Xiaqiu Qiu
- Chemical Genomics Centre, Max Planck Institute of Molecular Physiology, Dortmund, 44227, Germany; Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund, 44227, Germany; Faculty of Chemistry and Chemical Biology, TU Dortmund, Otto-Hahn Strasse 6, Dortmund, 44227, Germany
| | - Helen Lightfoot
- Safety & Mechanistic Pharmacology, Clinical Pharmacology and Safety Sciences, AstraZeneca, Cambridge, UK
| | - Peng Wu
- Chemical Genomics Centre, Max Planck Institute of Molecular Physiology, Dortmund, 44227, Germany; Department of Chemical Biology, Max Planck Institute of Molecular Physiology, Dortmund, 44227, Germany.
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9
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Acelas M, Dugarte-Dugarte A, Romero Bohórquez AR, Henao JA, Delgado JM, Díaz de Delgado G. Synthesis, crystal structure, Hirshfeld surface analysis and energy framework calculations of trans-3,7,9,9-tetra-methyl-10-(prop-2-yn-1-yl)-1,2,3,4,4a,9,9a,10-octa-hydro-acridine. Acta Crystallogr E Crystallogr Commun 2021; 77:226-232. [PMID: 33953941 PMCID: PMC8061106 DOI: 10.1107/s2056989021001183] [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: 01/27/2021] [Accepted: 02/02/2021] [Indexed: 11/11/2022]
Abstract
The title heterocyclic compound, C20H27N, has been prepared in good yield (72%) via a BiCl3-catalyzed cationic Povarov reaction between N-propargyl-4-methyl-aniline and (±)-citronellal. The X-ray single-crystal study indicates that the structure consists of mol-ecules connected by C-H⋯π contacts to produce chains, which pack in a sandwich-herringbone fashion along the b-axis direction. Hirshfeld surface analysis indicates that H⋯H inter-actions dominate by contributing 79.1% to the total surface. Energy frameworks and DFT calculations indicate a major contribution of dispersive forces to the total inter-action energy.
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Affiliation(s)
- Mauricio Acelas
- Grupo de Investigación en Compuestos Orgánicos de Interés Medicinal (CODEIM), Parque Tecnológico Guatiguará, Universidad Industrial de Santander, Piedecuesta, Colombia
| | - Analio Dugarte-Dugarte
- Laboratorio de Cristalografía-LNDRX, Departamento de Química, Facultad de Ciencias, Universidad de los Andes, Mérida, Venezuela
| | - Arnold R. Romero Bohórquez
- Grupo de Investigación en Compuestos Orgánicos de Interés Medicinal (CODEIM), Parque Tecnológico Guatiguará, Universidad Industrial de Santander, Piedecuesta, Colombia
| | - José Antonio Henao
- Grupo de Investigación en Química Estructural (GIQUE), Escuela de Química, Facultad de Ciencias, Universidad Industrial de Santander, Bucaramanga, Colombia
| | - José Miguel Delgado
- Laboratorio de Cristalografía-LNDRX, Departamento de Química, Facultad de Ciencias, Universidad de los Andes, Mérida, Venezuela
| | - Graciela Díaz de Delgado
- Laboratorio de Cristalografía-LNDRX, Departamento de Química, Facultad de Ciencias, Universidad de los Andes, Mérida, Venezuela
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10
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Singh RR, Singh TP, Singh NP, Naorem SS, Singh OM. Synthesis of Green/Blue Light Emitting Quinolines by Aza-D-A Reaction Using InCl 3 Catalyst. J Fluoresc 2021; 31:247-257. [PMID: 33219402 PMCID: PMC7679117 DOI: 10.1007/s10895-020-02647-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 10/30/2020] [Indexed: 12/27/2022]
Abstract
An efficient InCl3-catalyzed sequential reaction of aromatic amines, aromatic aldehydes and functionalized alkynes leading to the formation of new quinoline derivatives exhibiting significant fluorescence activities is described. The photophysical investigations of quinolines were carried out by absorption and photoluminescence measurements. One particular compound 4 h having maximum intensity, emitting green colour (Φ = 0.78) with average life time of 6.20 ns was the best amongst the tested compounds. The presence of the amino group at the 4-aryl substituent of the quinoline backbone played an important role in executing the Povarov cyclization successfully and enhancing the flourescence properties of the newly synthesized quinolines.
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Reyes-Gutiérrez PE, Amatov TT, Švec P, Císařová I, Šaman D, Pohl R, Teplý F, Pospíšil L. Helquats as Promoters of the Povarov Reaction: Synthesis of 1,2,3,4-Tetrahydroquinoline Scaffolds Catalyzed by Helicene-Viologen Hybrids. Chempluschem 2020; 85:2212-2218. [PMID: 32400944 DOI: 10.1002/cplu.202000151] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 04/29/2020] [Indexed: 01/10/2023]
Abstract
Helquats (HQs) are structurally linked to helicenes and viologens, and they represent an attractive field of research in chemistry and medicinal chemistry. In the present work they were used as catalysts for the synthesis of 1,2,3,4-tetrahydroquinolines in good yields by the Povarov reaction. The substrate scope and the capability of different helquats to promote Povarov reactions are demonstrated. Studies to elucidate mechanistic details revealed that helquats act as single-electron transfer oxidants through a cation-radical mechanism. The screening of the catalytic activity of HQs confirmed that an active HQ must have a LUMO energy below -8.67 eV and the standard redox potential higher (less negative) than -1.2 V vs. the ferrocene/ferrocenium redox couple.
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Affiliation(s)
- Paul E Reyes-Gutiérrez
- Department of Organic Synthesis, Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 16000, Prague 6, Czech Republic
| | - Tynchtyk T Amatov
- Department of Organic Synthesis, Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 16000, Prague 6, Czech Republic
| | - Pavel Švec
- Department of Organic Synthesis, Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 16000, Prague 6, Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry Faculty of Science, Charles University, Hlavova 2030/8, 12843, Prague 2, Czech Republic
| | - David Šaman
- Department of Organic Synthesis, Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 16000, Prague 6, Czech Republic
| | - Radek Pohl
- Department of Organic Synthesis, Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 16000, Prague 6, Czech Republic
| | - Filip Teplý
- Department of Organic Synthesis, Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 16000, Prague 6, Czech Republic
| | - Lubomír Pospíšil
- Department of Organic Synthesis, Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nám. 2, 16000, Prague 6, Czech Republic.,Department of Electrochemistry at Nanoscale, J. Heyrovský Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejškova 3, 18223, Prague, Czech Republic
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12
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Abstract
BACKGROUND Quinoline-containing compounds present in both natural and synthetic products are an important class of heterocyclic compounds. Many of the substituted quinolines have been used in various areas including medicine as drugs. Compounds with quinoline skeleton possess a wide range of bioactivities such as antimalarial, anti-bacterial, anthelmintic, anticonvulsant, antiviral, anti-inflammatory, and analgesic activity. Due to such a wide range of applicability, the synthesis of quinoline derivatives has attracted a lot of attention of chemists to develop effective methods. Many known methods have been expanded and improved. Furthermore, various new methods for quinoline synthesis have been established. This review will focus on considerable studies on the synthesis of quinolines date which back to 2014. OBJECTIVE In this review, we discussed recent achievements on the synthesis of quinoline compounds. Some classical methods have been modified and improved, while other new methods have been developed. A vast variety of catalysts were used for these transformations. In some studies, quinoline synthesis reaction mechanisms were also displayed. CONCLUSION Many methods for the synthesis of substituted quinoline rings have been developed recently. Over the past five years, the majority of those reported have been based on cycloisomerization and cyclization processes. Undoubtedly, more imaginative approaches to quinoline synthesis will appear in the literature in the near future. The application of known methods to natural product synthesis is probably the next challenge in the field.
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Affiliation(s)
- Duc Dau Xuan
- Department of Chemistry, Institute of Natural Science, Vinh University, Vinh City, Vietnam
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13
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Ghoshal A, Yugandhar D, Nanubolu JB, Srivastava AK. An Efficient One-Pot Synthesis of Densely Functionalized Fused-Quinolines via Sequential Ugi4CC and Acid-Mediated Povarov-Type Reaction. ACS Comb Sci 2017; 19:600-608. [PMID: 28741925 DOI: 10.1021/acscombsci.7b00095] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A divergent synthesis of fused-quinolines has been explored by performing Ugi four-component condensation and sulfuric acid promoted deprotection/Povarov-type reaction in one-pot. The process involves Ugi condensation of propiolic acids, aldehydes/ketones, aminoaldehyde acetals and isocyanides followed by sulfuric acid promoted deprotection and Povarov-type reaction with anilines in ethanol. This method enables straightforward access to the structurally diverse 2,3-dihydro-1H-pyrrolo[3,4-b]quinolin-1-ones (DHPQ), 3,4-dihydrobenzo[b][1,6]naphthyridin-1(2H)-ones (DHBN), and 2,3,4,5-tetrahydro-1H-azepino[4,3-b]quinolin-1-ones (THAQ), starting from readily available starting materials.
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Affiliation(s)
- Anirban Ghoshal
- Medicinal Chemistry & Biotechnology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India
- Chemical Sciences Division, Academy of Scientific & Innovative Research, New Delhi-110025, India
| | - Doddapaneni Yugandhar
- Medicinal Chemistry & Biotechnology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India
- Chemical Sciences Division, Academy of Scientific & Innovative Research, New Delhi-110025, India
| | - Jagadeesh Babu Nanubolu
- Centre
for X-ray Crystallography, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India
| | - Ajay Kumar Srivastava
- Medicinal Chemistry & Biotechnology Division, CSIR-Indian Institute of Chemical Technology, Hyderabad-500 007, India
- Chemical Sciences Division, Academy of Scientific & Innovative Research, New Delhi-110025, India
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14
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Almansour AI, Arumugam N, Suresh Kumar R, Mahalingam SM, Sau S, Bianchini G, Menéndez JC, Altaf M, Ghabbour HA. Design, synthesis and antiproliferative activity of decarbonyl luotonin analogues. Eur J Med Chem 2017; 138:932-941. [PMID: 28753517 DOI: 10.1016/j.ejmech.2017.07.027] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Revised: 07/06/2017] [Accepted: 07/16/2017] [Indexed: 12/26/2022]
Abstract
A small library of benzimidazole-fused pyrrolo[3,4-b]quinoline has been synthesized from readily available benzimidazole 2-carbaldehyde and various substituted arylamines in good to excellent yields utilizing an intramolecular Povarov reaction catalyzed by boron trifluoride diethyl etharate as the key final step. The compounds thus synthesized can be considered as decarbonyl analogues of the anticancer alkaloid luotonin A and were evaluated in a DNA relaxation assay for their ability to inhibit human topoisomerase I. Interestingly, two of the compounds showed a remarkable activity that is comparable to that of the standard drug camptothecin. The compounds were also evaluated for their cytotoxic effect in four highly aggressive human cancer cell lines, namely KB, MDA-MB231 (breast), LNCap (prostate), and HT1080 (fibrosarcoma). Some of the compounds obtained showed promising cytotoxicities for these four cell lines.
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Affiliation(s)
- Abdulrahman I Almansour
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Natarajan Arumugam
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.
| | - Raju Suresh Kumar
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - S M Mahalingam
- Purdue University, Department of Chemistry, 560 Oval Drive, West Lafayette, IN 47907-2084, USA
| | - Samaresh Sau
- Purdue University, Department of Chemistry, 560 Oval Drive, West Lafayette, IN 47907-2084, USA
| | - Giulia Bianchini
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain
| | - J Carlos Menéndez
- Departamento de Química Orgánica y Farmacéutica, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain.
| | - Mohammad Altaf
- Central Laboratory, Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Hazem A Ghabbour
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O. Box 2457, Riyadh 11451, Saudi Arabia
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15
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Goli N, Mainkar PS, Kotapalli SS, K T, Ummanni R, Chandrasekhar S. Expanding the tetrahydroquinoline pharmacophore. Bioorg Med Chem Lett 2017; 27:1714-20. [PMID: 28318941 DOI: 10.1016/j.bmcl.2017.02.077] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Revised: 02/15/2017] [Accepted: 02/28/2017] [Indexed: 11/21/2022]
Abstract
Tetrahydroquinoline is a privileged scaffold with a large number of biological applications. The tetrahydroquinoline pharmacophore has been expanded to yield 34 compounds. Biological screening of these compounds led to the identification of tetrahydroquinoline as neurotropic agents not reported earlier.
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16
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Di Pietro O, Vicente-García E, Taylor MC, Berenguer D, Viayna E, Lanzoni A, Sola I, Sayago H, Riera C, Fisa R, Clos MV, Pérez B, Kelly JM, Lavilla R, Muñoz-Torrero D. Multicomponent reaction-based synthesis and biological evaluation of tricyclic heterofused quinolines with multi-trypanosomatid activity. Eur J Med Chem 2015; 105:120-37. [PMID: 26479031 PMCID: PMC4638191 DOI: 10.1016/j.ejmech.2015.10.007] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2015] [Revised: 09/28/2015] [Accepted: 10/06/2015] [Indexed: 11/28/2022]
Abstract
Human African trypanosomiasis (HAT), Chagas disease and leishmaniasis, which are caused by the trypanosomatids Trypanosoma brucei, Trypanosoma cruzi and Leishmania species, are among the most deadly neglected tropical diseases. The development of drugs that are active against several trypanosomatids is appealing from a clinical and economic viewpoint, and seems feasible, as these parasites share metabolic pathways and hence might be treatable by common drugs. From benzonapthyridine 1, an inhibitor of acetylcholinesterase (AChE) for which we have found a remarkable trypanocidal activity, we have designed and synthesized novel benzo[h][1,6]naphthyridines, pyrrolo[3,2-c]quinolines, azepino[3,2-c]quinolines, and pyrano[3,2-c]quinolines through 2–4-step sequences featuring an initial multicomponent Povarov reaction as the key step. To assess the therapeutic potential of the novel compounds, we have evaluated their in vitro activity against T. brucei, T. cruzi, and Leishmania infantum, as well as their brain permeability, which is of specific interest for the treatment of late-stage HAT. To assess their potential toxicity, we have determined their cytotoxicity against rat myoblast L6 cells and their AChE inhibitory activity. Several tricyclic heterofused quinoline derivatives were found to display an interesting multi-trypanosomatid profile, with one-digit micromolar potencies against two of these parasites and two-digit micromolar potency against the other. Pyranoquinoline 39, which displays IC50 values of 1.5 μM, 6.1 μM and 29.2 μM against T. brucei, L. infantum and T. cruzi, respectively, brain permeability, better drug-like properties (lower lipophilicity and molecular weight and higher CNS MPO desirability score) than hit 1, and the lowest AChE inhibitory activity of the series (IC50 > 30 μM), emerges as an interesting multi-trypanosomatid lead, amenable to further optimization particularly in terms of its selectivity index over mammalian cells. Novel classes of tricyclic heterofused quinolines have been synthesized. Their 2–4-step syntheses involve a multicomponent Povarov reaction as the key step. Some compounds exhibit single digit micromolar potencies against 2 trypanosomatids. All compounds with multi-trypanosomatid activity can cross the blood–brain barrier. Most compounds with multi-trypanosomatid activity have drug like properties.
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Affiliation(s)
- Ornella Di Pietro
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Joan XXIII, 27-31, E-08028, Barcelona, Spain
| | | | - Martin C Taylor
- Department of Pathogen Molecular Biology, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, United Kingdom
| | - Diana Berenguer
- Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, 27-31, E-08028, Barcelona, Spain
| | - Elisabet Viayna
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Joan XXIII, 27-31, E-08028, Barcelona, Spain
| | - Anna Lanzoni
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Joan XXIII, 27-31, E-08028, Barcelona, Spain
| | - Irene Sola
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Joan XXIII, 27-31, E-08028, Barcelona, Spain
| | - Helena Sayago
- Barcelona Science Park, Baldiri Reixac, 10-12, E-08028, Barcelona, Spain
| | - Cristina Riera
- Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, 27-31, E-08028, Barcelona, Spain
| | - Roser Fisa
- Laboratori de Parasitologia, Departament de Microbiologia i Parasitologia Sanitàries, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, 27-31, E-08028, Barcelona, Spain
| | - M Victòria Clos
- Departament de Farmacologia, de Terapèutica i de Toxicologia, Institut de Neurociències, Universitat Autònoma de Barcelona, E-08193, Bellaterra, Barcelona, Spain
| | - Belén Pérez
- Departament de Farmacologia, de Terapèutica i de Toxicologia, Institut de Neurociències, Universitat Autònoma de Barcelona, E-08193, Bellaterra, Barcelona, Spain
| | - John M Kelly
- Department of Pathogen Molecular Biology, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, United Kingdom
| | - Rodolfo Lavilla
- Barcelona Science Park, Baldiri Reixac, 10-12, E-08028, Barcelona, Spain; Laboratori de Química Orgànica, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, 27-31, E-08028, Barcelona, Spain
| | - Diego Muñoz-Torrero
- Laboratori de Química Farmacèutica (Unitat Associada al CSIC), Facultat de Farmàcia, and Institut de Biomedicina (IBUB), Universitat de Barcelona, Av. Joan XXIII, 27-31, E-08028, Barcelona, Spain.
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17
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Yu J, Jiang HJ, Zhou Y, Luo SW, Gong LZ. Sodium salts of anionic chiral cobalt(III) complexes as catalysts of the enantioselective Povarov reaction. Angew Chem Int Ed Engl 2015; 54:11209-13. [PMID: 26230676 DOI: 10.1002/anie.201504790] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 06/30/2015] [Indexed: 11/11/2022]
Abstract
The sodium salts of anionic chiral cobalt(III) complexes (CCC(-) Na(+) ) have been found to be efficient catalysts of the asymmetric Povarov reaction of easily accessible dienophiles, such as 2,3-dihydrofuran, ethyl vinyl ether, and an N-protected 2,3-dihydropyrrole, with 2-azadienes. Ring-fused tetrahydroquinolines with up to three contiguous stereogenic centers were thus obtained in high yields, excellent diastereoselectivities (endo/exo up to >20:1), and high enantioselectivities (up to 95:5 e.r.).
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Affiliation(s)
- Jie Yu
- Department of Applied Chemistry, Anhui Agricultural University (China)
| | - Hua-Jie Jiang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China (China)
| | - Ya Zhou
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China (China)
| | - Shi-Wei Luo
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China (China)
| | - Liu-Zhu Gong
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China (China). .,Collaborative Innovation Centre of Chemical Science and Engineering, Tianjin (China).
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Kulkarni AR, Thakur GA. Microwave-assisted Expeditious and Efficient Synthesis of Cyclopentene Ring-fused Tetrahydroquinoline Derivatives Using Three-component Povarov Reaction. Tetrahedron Lett 2013; 54. [PMID: 24421568 DOI: 10.1016/j.tetlet.2013.09.107] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [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] [Indexed: 01/01/2023]
Abstract
We report here an efficient and expeditious microwave-assisted synthesis of cyclopentadiene ring-fused tetrahydroquinolines using the three-component Povarov reaction catalyzed by indium (III) chloride. This method has an advantage of shorter reaction time (10 - 15 min) with high and reproducible yields (up to 90%) and is suitable for parallel library synthesis. The optimization process is reported and the results from the microwave route are compared with those of the conventional synthetic route. In almost all cases, the microwave acceleration consistently provided improved yields favoring the cis-diastereomer.
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Affiliation(s)
- Abhijit R Kulkarni
- Department of Pharmaceutical Sciences, Bouvé College of Pharmacy, Northeastern University, Boston, MA, 02115, USA
| | - Ganesh A Thakur
- Department of Pharmaceutical Sciences, Bouvé College of Pharmacy, Northeastern University, Boston, MA, 02115, USA ; Center for Drug Discovery, Northeastern University, Boston, MA, 02115, USA
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Sun J, Gao H, Wu Q, Yan CG. Facile synthesis of functionalized tetrahydroquinolines via domino Povarov reactions of arylamines, methyl propiolate and aromatic aldehydes. Beilstein J Org Chem 2012; 8:1839-43. [PMID: 23209520 PMCID: PMC3511020 DOI: 10.3762/bjoc.8.211] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [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: 08/16/2012] [Accepted: 09/24/2012] [Indexed: 11/23/2022] Open
Abstract
In the presence of p-toluenesulfonic acid as catalyst the domino reaction of arylamines, methyl propiolates and aromatic aldehydes in ethanol proceeded smoothly to give polysubstituted 1,2,3,4-tetrahydroquinolines in moderate yields. The reaction is believed to involve the Povarov reaction of in situ generated β-enamino ester with the in situ formed aromatic imine.
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Affiliation(s)
- Jing Sun
- College of Chemistry & Chemical Engineering, Yangzhou University, Yangzhou 225002, China
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