1
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Zhu C, Zhou J, Li T, Yang J, Jin H, Zhang L. Access to 2-pyridinones comprising enaminonitriles via AgOAc promoted cascade reactions of thioesters with aminomethylene malononitriles. Org Biomol Chem 2023; 21:6881-6885. [PMID: 37486037 DOI: 10.1039/d3ob00915g] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
The facile synthesis of 2-pyridinones containing enaminonitriles from thioesters with aminomethylene malononitriles is achieved through an AgOAc-promoted acylation/cyclization/tautomerization cascade reaction. Control experiments reveal that AgOAc acts as a versatile promoter, activating both thioester and cyano groups while also serving as a Brønsted base in the cascade sequence. Moreover, 2-pyridinones were transformed into biologically significant 2-pyridinone-fused 2-pyrimidones with intriguing fluorescence emission properties.
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Affiliation(s)
- Chen Zhu
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, People's Republic of China
- National-Local Joint Engineering Laboratory for Development of Boron and Magnesium Resources and Fine Chemical Technology, Liaoning Province Key Laboratory of Green Functional Molecular Design and Development, Institute of Functional Molecules, Shenyang University of Chemical Technology, Shenyang 110142, People's Republic of China.
| | - Jubao Zhou
- National-Local Joint Engineering Laboratory for Development of Boron and Magnesium Resources and Fine Chemical Technology, Liaoning Province Key Laboratory of Green Functional Molecular Design and Development, Institute of Functional Molecules, Shenyang University of Chemical Technology, Shenyang 110142, People's Republic of China.
| | - Tianxing Li
- National-Local Joint Engineering Laboratory for Development of Boron and Magnesium Resources and Fine Chemical Technology, Liaoning Province Key Laboratory of Green Functional Molecular Design and Development, Institute of Functional Molecules, Shenyang University of Chemical Technology, Shenyang 110142, People's Republic of China.
| | - Jiaxin Yang
- National-Local Joint Engineering Laboratory for Development of Boron and Magnesium Resources and Fine Chemical Technology, Liaoning Province Key Laboratory of Green Functional Molecular Design and Development, Institute of Functional Molecules, Shenyang University of Chemical Technology, Shenyang 110142, People's Republic of China.
| | - Hui Jin
- National-Local Joint Engineering Laboratory for Development of Boron and Magnesium Resources and Fine Chemical Technology, Liaoning Province Key Laboratory of Green Functional Molecular Design and Development, Institute of Functional Molecules, Shenyang University of Chemical Technology, Shenyang 110142, People's Republic of China.
| | - Lixin Zhang
- School of Chemical Engineering, University of Science and Technology Liaoning, Anshan 114051, People's Republic of China
- National-Local Joint Engineering Laboratory for Development of Boron and Magnesium Resources and Fine Chemical Technology, Liaoning Province Key Laboratory of Green Functional Molecular Design and Development, Institute of Functional Molecules, Shenyang University of Chemical Technology, Shenyang 110142, People's Republic of China.
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2
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Zhong Q, Wang Y, Lan H, Zhu H, Fan Q. Construction of 3,12-Diazatetracyclododecane-dienes through Unexpected Visible-Light-Induced Radical Cascade Cyclization. J Org Chem 2022; 87:10937-10946. [PMID: 35921484 DOI: 10.1021/acs.joc.2c01225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel visible-light-induced cascade radical cyclization reaction of 3-cyano-4-aryl-1,4-dihydropyridines for the construction of 3,12-diazatetracyclododecane-diene derivatives is reported for the first time. In the presence of 410 nm blue LED lamp as the light source and ethanol as the solvent, the reactions proceed smoothly to afford photocyclization products in good yields. The process is carried out through the breaking of original C═C double bonds and the formation of three new single bonds in one pot and proved to be able to tolerate different substituents.
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Affiliation(s)
- Qidi Zhong
- School of Pharmacy, North China University of Science and Technology, Tangshan, Hebei 063210, China
| | - Yinxin Wang
- School of Pharmacy, North China University of Science and Technology, Tangshan, Hebei 063210, China
| | - Hanyang Lan
- School of Pharmacy, North China University of Science and Technology, Tangshan, Hebei 063210, China
| | - Hao Zhu
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei 063210, China
| | - Qiangwen Fan
- School of Chemistry, Biology and Materials Science, East China University of Technology, Nanchang 330013, China
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3
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Crystal structure of 6-oxo-4-phenyl-1-propyl-1,6-dihydropyridine-3-carbonitrile, C15H14N2O. Z KRIST-NEW CRYST ST 2021. [DOI: 10.1515/ncrs-2021-0178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
C15H14N2O, orthorhombic, P212121 (no. 19), a = 7.6510(15) Å, b = 11.465(2) Å, c = 14.526(3) Å, V = 1274.2(4) Å3, Z = 4, R
gt
(F) = 0.0422, wR
ref
(F
2) = 0.1199, T = 296 K.
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4
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Maryasov MA, Romashov NP, Davydova VV, Nasakin OE, Osipova MP. Synthesis of 4-Aryl-6-oxo-5-cyano-1,6-dihydropyridine-2-carboxylic Acids and Their Methyl Esters by Reacting Methyl Acylpyruvates with Malononitrile and Cyanoacetamide. RUSS J GEN CHEM+ 2021. [DOI: 10.1134/s1070363221050261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Zhang M, Lan H, Li N, Zhong Q, Zhu H, Liu C, Zhao H. Photocatalyst-Free Singlet Oxygen-Induced Oxygenation: A Strategy for the Preparation of 5-Cyano-2-pyridones Driven by Blue-Light Irradiation. J Org Chem 2020; 85:8279-8286. [DOI: 10.1021/acs.joc.0c00963] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Mengmeng Zhang
- School of Pharmacy, North China University of Science and Technology, Tangshan, Hebei 063210, P. R. China
| | - Hanyang Lan
- School of Pharmacy, North China University of Science and Technology, Tangshan, Hebei 063210, P. R. China
| | - Nan Li
- School of Pharmacy, North China University of Science and Technology, Tangshan, Hebei 063210, P. R. China
| | - Qidi Zhong
- School of Pharmacy, North China University of Science and Technology, Tangshan, Hebei 063210, P. R. China
| | - Hao Zhu
- School of Public Health, North China University of Science and Technology, Tangshan, Hebei 063210, P. R. China
| | - Chunyan Liu
- School of Pharmacy, North China University of Science and Technology, Tangshan, Hebei 063210, P. R. China
| | - Hongwu Zhao
- College of Life Science and Bio-engineering, Beijing University of Technology, Beijing, 100124, P. R. China
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6
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Chicca A, Arena C, Bertini S, Gado F, Ciaglia E, Abate M, Digiacomo M, Lapillo M, Poli G, Bifulco M, Macchia M, Tuccinardi T, Gertsch J, Manera C. Polypharmacological profile of 1,2-dihydro-2-oxo-pyridine-3-carboxamides in the endocannabinoid system. Eur J Med Chem 2018; 154:155-171. [PMID: 29793210 DOI: 10.1016/j.ejmech.2018.05.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 05/11/2018] [Accepted: 05/12/2018] [Indexed: 02/07/2023]
Abstract
The endocannabinoid system (ECS) represents one of the major neuromodulatory systems involved in different physiological and pathological processes. Multi-target compounds exert their activities by acting via multiple mechanisms of action and represent a promising pharmacological modulation of the ECS. In this work we report 4-substituted and 4,5-disubstituted 1,2-dihydro-2-oxo-pyridine-3-carboxamide derivatives with a broad spectrum of affinity and functional activity towards both cannabinoid receptors and additional effects on the main components of the ECS. In particular compound B3 showed high affinity for CB1R (Ki = 23.1 nM, partial agonist) and CB2R (Ki = 6.9 nM, inverse agonist) and also significant inhibitory activity (IC50 = 70 nM) on FAAH with moderate inhibition of ABHD12 (IC50 = 2.5 μΜ). Compounds B4, B5 and B6 that act as full agonists at CB1R and as partial agonists (B5 and B6) or antagonist (B4) at CB2R, exhibited an additional multi-target property by inhibiting anandamide uptake with sub-micromolar IC50 values (0.28-0.62 μΜ). The best derivatives showed cytotoxic activity on U937 lymphoblastoid cells. Finally, molecular docking analysis carried out on the three-dimensional structures of CB1R and CB2R and of FAAH allowed to rationalize the structure-activity relationships of this series of compounds.
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Affiliation(s)
- Andrea Chicca
- Institute of Biochemistry and Molecular Medicine, NCCR TransCure, University of Bern, Bühlstrasse 28, CH-3012, Bern, Switzerland
| | - Chiara Arena
- Department of Pharmacy, University of Pisa, 56126, Pisa, Italy
| | - Simone Bertini
- Department of Pharmacy, University of Pisa, 56126, Pisa, Italy
| | - Francesca Gado
- Department of Pharmacy, University of Pisa, 56126, Pisa, Italy
| | - Elena Ciaglia
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, 84081, Baronissi, Salerno, Italy
| | - Mario Abate
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, 84081, Baronissi, Salerno, Italy
| | - Maria Digiacomo
- Department of Pharmacy, University of Pisa, 56126, Pisa, Italy
| | | | - Giulio Poli
- Department of Biotechnology, Chemistry and Pharmacy, University of Siena, via Aldo Moro 2, 53019, Siena, Italy
| | - Maurizio Bifulco
- Department of Molecular Medicine and Medical Biotechnology, University of Naples Federico II, 80131, Naples, Italy
| | - Marco Macchia
- Department of Pharmacy, University of Pisa, 56126, Pisa, Italy
| | - Tiziano Tuccinardi
- Department of Pharmacy, University of Pisa, 56126, Pisa, Italy; Sbarro Institute for Cancer Research and Molecular Medicine, Center for Biotechnology, College of Science and Technology, Temple University, Philadelphia, PA 19122, USA
| | - Jürg Gertsch
- Institute of Biochemistry and Molecular Medicine, NCCR TransCure, University of Bern, Bühlstrasse 28, CH-3012, Bern, Switzerland
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7
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Li R, Ning X, Zhou S, Lin Z, Wu X, Chen H, Bai X, Wang X, Ge Z, Li R, Yin Y. Discovery and structure-activity relationship of novel 4-hydroxy-thiazolidine-2-thione derivatives as tumor cell specific pyruvate kinase M2 activators. Eur J Med Chem 2018; 143:48-65. [PMID: 29172082 DOI: 10.1016/j.ejmech.2017.11.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 10/18/2017] [Accepted: 11/08/2017] [Indexed: 12/31/2022]
Abstract
Pyruvate kinase M2 isoform (PKM2) is a crucial protein responsible for aerobic glycolysis of cancer cells. Activation of PKM2 may alter aberrant metabolism in cancer cells. In this study, we discovered a 4-hydroxy-thiazolidine-2-thione compound 2 as a novel PKM2 activator from a random screening of an in-house compound library. Then a series of novel 4-hydroxy-thiazolidine-2-thione derivatives were designed and synthesized for screening as potent PKM2 activators. Among these, some compounds showed higher PKM2 activation activity than lead compound 2 and also exhibited significant anti-proliferative activities on human cancer cell lines at nanomolar concentration. The compound 5w was identified as the most potent antitumor agent, which showed excellent anti-proliferative effects with IC50 values from 0.46 μM to 0.81 μM against H1299, HCT116, Hela and PC3 cell lines. 5w also showed less cytotoxicity in non-tumor cell line HELF compared with cancer cells. In addition, Preliminary pharmacological studies revealed that 5w arrests the cell cycle at the G2/M phase in HCT116 cell line. The best PKM2 activation by compound 5t was rationalized through docking studies.
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Affiliation(s)
- Ridong Li
- Institute of Systems Biomedicine, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, PR China; State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, PR China; Department of Pharmacology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, PR China
| | - Xianling Ning
- Institute of Systems Biomedicine, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, PR China; Department of Pharmacology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, PR China
| | - Shuo Zhou
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentuchy, 789 South Lime-stone Street, Lexington, KY 40536, USA
| | - Zhiqiang Lin
- Institute of Systems Biomedicine, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, PR China
| | - Xingyu Wu
- Institute of Systems Biomedicine, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, PR China; Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, PR China
| | - Hong Chen
- Institute of Systems Biomedicine, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, PR China; Peking-Tsinghua Center for Life Sciences, Peking University Health Science Center, Beijing 100191, PR China
| | - Xinyu Bai
- Institute of Systems Biomedicine, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, PR China; Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, PR China
| | - Xin Wang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, PR China
| | - Zemei Ge
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, PR China
| | - Runtao Li
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, PR China.
| | - Yuxin Yin
- Institute of Systems Biomedicine, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, PR China; State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, PR China; Peking-Tsinghua Center for Life Sciences, Peking University Health Science Center, Beijing 100191, PR China; Department of Pathology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, PR China.
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8
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Ladraa S, Chioua M, Belfaitah A. A Simple and Ecofriendly One-Pot Synthesis of Highly Substituted 3-Cyanopyridine-Quinoline Hybridsviaa Triphenyphosphine-Catalyzed Multicomponent Reaction Under Mild Conditions. J Heterocycl Chem 2016. [DOI: 10.1002/jhet.2631] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Souheila Ladraa
- Laboratoire des Produits Naturels d'Origine Végétale et de Synthèse Organique, Faculté des Sciences Exactes, Campus de Chaabat Ersas; Université des frères Mentouri-Constantine; Constantine 25000 Algeria
| | - Mourad Chioua
- Instituto de Quimica Organica General; Spanish National Research Council; CSIC at C/Serrano, 117 28006 Madrid Spain
| | - Ali Belfaitah
- Laboratoire des Produits Naturels d'Origine Végétale et de Synthèse Organique, Faculté des Sciences Exactes, Campus de Chaabat Ersas; Université des frères Mentouri-Constantine; Constantine 25000 Algeria
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9
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Discovery of substituted 1,4-dihydroquinolines as novel promising class of P-glycoprotein inhibitors: First structure–activity relationships and bioanalytical studies. Bioorg Med Chem Lett 2015; 25:3005-8. [DOI: 10.1016/j.bmcl.2015.05.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 05/07/2015] [Accepted: 05/11/2015] [Indexed: 11/21/2022]
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10
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Sośnicki JG, Dzitkowski P, Struk Ł. Regioselective Synthesis of 6-Vinyl-3,6-dihydropyridine-2(1H)-ones through Simple Addition of a Vinylmagnesium “Ate” Complex to 2-Pyridones. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500605] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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11
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Gezegen H, Ceylan M, Karaman İ, Şahin E. Synthesis, Characterization, and Antibacterial Activity of Novel Pyridones. SYNTHETIC COMMUN 2014. [DOI: 10.1080/00397911.2013.845902] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Hayreddin Gezegen
- a Department of Chemistry , Faculty of Arts and Sciences, Gaziosmanpasa University , Tokat , Turkey
| | - Mustafa Ceylan
- a Department of Chemistry , Faculty of Arts and Sciences, Gaziosmanpasa University , Tokat , Turkey
| | - İsa Karaman
- b Department of Biology , Faculty of Arts and Sciences, Gaziosmanpasa University , Tokat , Turkey
| | - Ertan Şahin
- c Department of Chemistry , Faculty of Science, Atatürk University , Erzurum , Turkey
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12
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Facile eco-friendly synthesis of novel chromeno[4,3-b]pyridine-2,5-diones and evaluation of their antimicrobial and antioxidant properties. J CHEM SCI 2014. [DOI: 10.1007/s12039-013-0565-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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13
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Synthesis and characterization of the first examples of ferrocene and [η5-CpCo(η4-C4Ph4)] derived 2-pyridones. INORG CHEM COMMUN 2013. [DOI: 10.1016/j.inoche.2013.07.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Elassar AZA, Alsughayer A, Sagheer FA. Convenient Synthesis and Antibacterial Activity of Tricyclic Azine Derivatives. JOURNAL OF CHEMICAL RESEARCH 2013. [DOI: 10.3184/174751913x13640546938841] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
1,4-Phenylenediamine reacted readily with 2 mol of ethyl acetoacetate to give diethyl ( 2Z,2′Z)-3,3′-[(1,4-phenylene)-bisimino]dibut-2-enoate, which reacted with dimethylformamide dimethylacetal, activated methylene nitriles, ylidenemalononitriles and phenyl and benzoyl isothiocyanate to give, respectively, a 4,7-phenanthroline-2,9-dicarb-oxylate-1,10-diol, and tricyclic bispyridine and bispyrimidine derivatives. Two compounds showed strong antibacterial activity against several microorganisms, while six others showed high to moderate activity.
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Affiliation(s)
- Abdel-Zaher A. Elassar
- Chemistry Department, Faculty of Science, Kuwait University, PO Box 5969-Safat-13060, Kuwait
- Chemistry Department, Faculty of Science, Helwan University, Helwan, Cairo, Egypt
| | - Abdulhakeem Alsughayer
- Pharmaceutical Science Department, College of Health Science, The Public Authority for Applied Education and Training, Kuwait
| | - Fakhreia Al Sagheer
- Chemistry Department, Faculty of Science, Kuwait University, PO Box 5969-Safat-13060, Kuwait
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15
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Baumert C, Günthel M, Krawczyk S, Hemmer M, Wersig T, Langner A, Molnár J, Lage H, Hilgeroth A. Development of small-molecule P-gp inhibitors of the N-benzyl 1,4-dihydropyridine type: novel aspects in SAR and bioanalytical evaluation of multidrug resistance (MDR) reversal properties. Bioorg Med Chem 2012. [PMID: 23199479 DOI: 10.1016/j.bmc.2012.10.041] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Novel series of N-benzyl 1,4-dihydropyridines have been prepared by facile syntheses. All relevant substituents of the molecular scaffold have been varied. The resulting compounds were biologically evaluated as P-glycoprotein (P-gp) inhibitors. Substitutions of the N-benzyl residue favour biological activity beside respective 3-ester functions. Most active compounds were further evaluated as multidrug resistance (MDR) modulators to restore the cytotoxic properties of varying daunorubicin applications.
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16
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Synthesis and biological evaluation of novel bifendate derivatives bearing 6,7-dihydro-dibenzo[c,e]azepine scaffold as potent P-glycoprotein inhibitors. Eur J Med Chem 2012; 51:137-44. [DOI: 10.1016/j.ejmech.2012.02.034] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2011] [Revised: 02/11/2012] [Accepted: 02/16/2012] [Indexed: 12/18/2022]
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17
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Gu X, Ren Z, Tang X, Peng H, Ma Y, Lai Y, Peng S, Zhang Y. Synthesis and biological evaluation of bifendate-chalcone hybrids as a new class of potential P-glycoprotein inhibitors. Bioorg Med Chem 2012; 20:2540-8. [PMID: 22429509 DOI: 10.1016/j.bmc.2012.02.050] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2012] [Revised: 02/21/2012] [Accepted: 02/22/2012] [Indexed: 12/31/2022]
Abstract
Overexpression of P-glycoprotein (P-gp) is one of the major problems to successful cancer chemotherapy. To find novel effective P-gp inhibitors, a series of bifendate-chalcone hybrids were synthesized and evaluated. Among them, the most active compound 8g had little intrinsic cytotoxicity (IC(50)>200 μM), and could increase accumulation of Rhodamine 123 in K562/A02 cells more potently than bifendate and verapamil (VRP) by inhibiting P-gp efflux function. And 8g displayed potent chemo-sensitizing effect and persisted for much longer time (>24h) compared with VRP (<6h). In addition, 8g, unlike VRP, showed no stimulation on the P-gp ATPase activity, suggesting it is not a P-gp substrate. Therefore, 8g may represent a promising lead to develop MDR reversal agents for cancer chemotherapy.
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Affiliation(s)
- Xiaoke Gu
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, PR China
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18
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