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Piperidine-Iodine as Efficient Dual Catalyst for the One-Pot, Three-Component Synthesis of Coumarin-3-Carboxamides. Molecules 2022; 27:molecules27144659. [PMID: 35889530 PMCID: PMC9323834 DOI: 10.3390/molecules27144659] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 07/15/2022] [Accepted: 07/19/2022] [Indexed: 11/17/2022] Open
Abstract
A simple and efficient one-pot, three-component synthetic method for the preparation of coumarin-3-carboxamides was carried out by the reaction of salicylaldehyde, aliphatic primary/secondary amines, and diethylmalonate. The protocol employs piperidine-iodine as a dual system catalyst and ethanol, a green solvent. The main advantages of this approach are that it is a metal-free and clean reaction, has low catalyst loading, and requires no tedious workup.
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Artificial intelligence and machine-learning approaches in structure and ligand-based discovery of drugs affecting central nervous system. Mol Divers 2022; 27:959-985. [PMID: 35819579 DOI: 10.1007/s11030-022-10489-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Accepted: 06/21/2022] [Indexed: 12/11/2022]
Abstract
CNS disorders are indications with a very high unmet medical needs, relatively smaller number of available drugs, and a subpar satisfaction level among patients and caregiver. Discovery of CNS drugs is extremely expensive affair with its own unique challenges leading to extremely high attrition rates and low efficiency. With explosion of data in information age, there is hardly any aspect of life that has not been touched by data driven technologies such as artificial intelligence (AI) and machine learning (ML). Drug discovery is no exception, emergence of big data via genomic, proteomic, biological, and chemical technologies has driven pharmaceutical giants to collaborate with AI oriented companies to revolutionise drug discovery, with the goal of increasing the efficiency of the process. In recent years many examples of innovative applications of AI and ML techniques in CNS drug discovery has been reported. Research on therapeutics for diseases such as schizophrenia, Alzheimer's and Parkinsonism has been provided with a new direction and thrust from these developments. AI and ML has been applied to both ligand-based and structure-based drug discovery and design of CNS therapeutics. In this review, we have summarised the general aspects of AI and ML from the perspective of drug discovery followed by a comprehensive coverage of the recent developments in the applications of AI/ML techniques in CNS drug discovery.
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Mucha P, Skoczyńska A, Małecka M, Hikisz P, Budzisz E. Overview of the Antioxidant and Anti-Inflammatory Activities of Selected Plant Compounds and Their Metal Ions Complexes. Molecules 2021; 26:4886. [PMID: 34443474 PMCID: PMC8398118 DOI: 10.3390/molecules26164886] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/09/2021] [Accepted: 08/10/2021] [Indexed: 12/12/2022] Open
Abstract
Numerous plant compounds and their metal-ion complexes exert antioxidative, anti-inflammatory, anticancer, and other beneficial effects. This review highlights the different bioactivities of flavonoids, chromones, and coumarins and their metal-ions complexes due to different structural characteristics. In addition to insight into the most studied antioxidative properties of these compounds, the first part of the review provides a comprehensive overview of exogenous and endogenous sources of reactive oxygen and nitrogen species, oxidative stress-mediated damages of lipids and proteins, and on protective roles of antioxidant defense systems, including plant-derived antioxidants. Additionally, the review covers the anti-inflammatory and antimicrobial activities of flavonoids, chromones, coumarins and their metal-ion complexes which support its application in medicine, pharmacy, and cosmetology.
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Affiliation(s)
- Paulina Mucha
- Department of the Chemistry of Cosmetic Raw Materials, Faculty of Pharmacy, Medical University of Łódź, Muszyńskiego 1, 90-151 Łódź, Poland
| | - Anna Skoczyńska
- Department of Pharmacology, School of Pharmacy with the Division of Laboratory Medicine in Sosnowiec, Medical University of Silesia, Poniatowskiego 15, 41-200 Sosnowiec, Poland;
| | - Magdalena Małecka
- Department of Physical Chemistry, Faculty of Chemistry, University of Lodz, Pomorska 163/165, 90-236 Łódź, Poland;
| | - Paweł Hikisz
- Department of Molecular Biophysics, Faculty of Biology and Environmental Protection, University of Lodz, Pomorska 141/143, 90-236 Łódź, Poland;
| | - Elzbieta Budzisz
- Department of the Chemistry of Cosmetic Raw Materials, Faculty of Pharmacy, Medical University of Łódź, Muszyńskiego 1, 90-151 Łódź, Poland
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SAVRAN T, KARAGÖZ A, KARUK ELMAS ŞN, AYDIN D, ÖZEN F, KORAN K, ARSLAN FN, GÖRGÜLÜ AO, YILMAZ İ. Fluorescent sensing platform for low-cost detection of Cu2+ by coumarin derivative: DFT calculation and practical application in herbal and black tea samples. Turk J Chem 2020; 44:1148-1163. [PMID: 33488219 PMCID: PMC7751904 DOI: 10.3906/kim-2004-63] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 06/26/2020] [Indexed: 11/03/2022] Open
Abstract
A fluorogenic probe based on a coumarin-derivative for Cu2+ sensing in CH3CN/H2O media (v/v, 95/5, 5.0 μM) was developed and applied in real samples. 3-(4-chlorophenyl)-6,7-dihydroxy-coumarin (MCPC) probe was obtained by synthetic methodologies and identified by spectral techniques. The probe MCPC showed remarkable changes with a "turn-off" fluorogenic sensing approach for the monitoring of Cu2+ at 456 nm under an excitation wavelength of 366 nm. The response time of the probe MCPC was founded as only 1 min. The detection limit of the probe MCPC was recorded to be 1.47 nM. The binding constant and possible stoichiometric ratio (1:1) values were determined by Benesi-Hildebrand and Job's plot systems, respectively. The mechanism of the probe MCPC with Cu2+ was further confirmed by ESI-MS and FT-IR analyses, as well as supported by theoretical calculations. Furthermore, the probe MCPC was successfully employed for the practical applications to sense Cu2+ in different herbal and black tea samples. The proposed sensing method was also verified by ICP-OES method.
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Affiliation(s)
- Tahir SAVRAN
- Department of Chemistry, Kamil Özdağ Science Faculty, Karamanoğlu Mehmetbey University, KaramanTurkey
| | - Abdurrahman KARAGÖZ
- Department of Chemistry, Kamil Özdağ Science Faculty, Karamanoğlu Mehmetbey University, KaramanTurkey
| | - Şükriye Nihan KARUK ELMAS
- Department of Chemistry, Kamil Özdağ Science Faculty, Karamanoğlu Mehmetbey University, KaramanTurkey
| | - Duygu AYDIN
- Department of Chemistry, Kamil Özdağ Science Faculty, Karamanoğlu Mehmetbey University, KaramanTurkey
| | - Furkan ÖZEN
- Department of Mathematics and Science, Faculty of Education, Akdeniz University, AntalyaTurkey
| | - Kenan KORAN
- Department of Chemistry, Faculty of Science, Fırat University, ElazığTurkey
| | - Fatma Nur ARSLAN
- Department of Chemistry, Kamil Özdağ Science Faculty, Karamanoğlu Mehmetbey University, KaramanTurkey
| | | | - İbrahim YILMAZ
- Department of Chemistry, Kamil Özdağ Science Faculty, Karamanoğlu Mehmetbey University, KaramanTurkey
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A Reversible Colorimetric and Fluorescence "Turn-Off" Chemosensor for Detection of Cu 2+ and Its Application in Living Cell Imaging. Molecules 2019; 24:molecules24234283. [PMID: 31775232 PMCID: PMC6930558 DOI: 10.3390/molecules24234283] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Revised: 11/12/2019] [Accepted: 11/22/2019] [Indexed: 11/17/2022] Open
Abstract
Dual-function chemosensors that combine the capability of colorimetric and fluorimetric detection of Cu2+ are still relatively rare. Herein, we report that a 3-hydroxyflavone derivative (E)-2-(4-(dimethylamino)styryl)-3-hydroxy-4H-chromen-4-one (4), which is a red-emitting fluorophore, could serve as a reversible colorimetric and fluorescence “turn-off” chemosensor for the detection of Cu2+. Upon addition of Cu2+ to 4 in neutral aqueous solution, a dramatic color change from yellow to purple-red was clearly observed, and its fluorescence was markedly quenched, which was attributed to the complexation between the chemosensor and Cu2+. Conditions of the sensing process had been optimized, and the sensing studies were performed in a solution of ethanol/phosphate buffer saline (v/v = 3:7, pH = 7.0). The sensing system exhibited high selectivity towards Cu2+. The limit of naked eye detection of Cu2+ was determined at 8 × 10−6 mol/L, whereas the fluorescence titration experiment showed a detection limit at 5.7 × 10−7 mol/L. The complexation between 4 and Cu2+ was reversible, and the binding constant was found to be 3.2 × 104 M−1. Moreover, bioimaging experiments showed that 4 could penetrate the cell membrane and respond to the intracellular changes of Cu2+ within living cells, which indicated its potential for biological applications.
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He C, Yu S, Ma S, Liu Z, Yao L, Cheng F, Liu P. A Novel Ruthenium(II) Polypyridyl Complex Bearing 1,8-Naphthyridine as a High Selectivity and Sensitivity Fluorescent Chemosensor for Cu 2+ and Fe 3+ Ions. Molecules 2019; 24:molecules24224032. [PMID: 31703348 PMCID: PMC6891798 DOI: 10.3390/molecules24224032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 10/27/2019] [Accepted: 10/31/2019] [Indexed: 02/02/2023] Open
Abstract
A novel ruthenium(II) polypyridyl complex bearing 1,8-naphthyridine was successfully designed and synthesized. This complex was fully characterized by EI-HRMS, NMR, and elemental analyses. The recognition properties of the complex for various metal ions were investigated. The results suggested that the complex displayed high selectivity and sensitivity for Cu2+ and Fe3+ ions with good anti-interference in the CH3CN/H2O (1:1, v/v) solution. The fluorescent chemosensor showed obvious fluorescence quenching when the Cu2+ and Fe3+ ions were added. The detection limits of Cu2+ and Fe3+ were 39.9 nmol/L and 6.68 nmol/L, respectively. This study suggested that this Ru(II) polypyridyl complex can be used as a high selectivity and sensitivity fluorescent chemosensor for Cu2+ and Fe3+ ions.
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Affiliation(s)
- Chixian He
- Center for Yunnan-Guizhou Plateau Chemical Functional Materials and Pollution Control, Qujing Normal University, Qujing 655011, China; (C.H.); (Z.L.)
- College of Chemistry and Environmental Science, Qujing Normal University, Qujing 655011, China; (S.Y.); (L.Y.); (P.L.)
| | - Shiwen Yu
- College of Chemistry and Environmental Science, Qujing Normal University, Qujing 655011, China; (S.Y.); (L.Y.); (P.L.)
| | - Shuye Ma
- Department of Medicine, Qujing Qilin Vocational and Technical School, Qujing 655000, China;
| | - Zining Liu
- Center for Yunnan-Guizhou Plateau Chemical Functional Materials and Pollution Control, Qujing Normal University, Qujing 655011, China; (C.H.); (Z.L.)
| | - Lifeng Yao
- College of Chemistry and Environmental Science, Qujing Normal University, Qujing 655011, China; (S.Y.); (L.Y.); (P.L.)
| | - Feixiang Cheng
- Center for Yunnan-Guizhou Plateau Chemical Functional Materials and Pollution Control, Qujing Normal University, Qujing 655011, China; (C.H.); (Z.L.)
- College of Chemistry and Environmental Science, Qujing Normal University, Qujing 655011, China; (S.Y.); (L.Y.); (P.L.)
- Correspondence: ; Tel.: +86-0874-099-8658
| | - Pinhua Liu
- College of Chemistry and Environmental Science, Qujing Normal University, Qujing 655011, China; (S.Y.); (L.Y.); (P.L.)
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