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Kumar G, Saroha B, Kumar R, Kumari M, Kumar S. Recent Advances in Synthesis and Biological Assessment of Quinoline‐Oxygen Heterocycle Hybrids. ChemistrySelect 2021. [DOI: 10.1002/slct.202100906] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Gourav Kumar
- Department of Chemistry Kurukshetra University Kurukshetra Haryana India- 136119
| | - Bhavna Saroha
- Department of Chemistry Kurukshetra University Kurukshetra Haryana India- 136119
| | - Ramesh Kumar
- Department of Chemistry Kurukshetra University Kurukshetra Haryana India- 136119
| | - Meena Kumari
- Department of Chemistry Govt. College for Women Charkhi Dadri Haryana India 127308
| | - Suresh Kumar
- Department of Chemistry Kurukshetra University Kurukshetra Haryana India- 136119
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Sabu V, Krishnan S, Peter J, Aswathy IS, Lal Preethi SS, Simon M, Radhakrishna GP, Helen A. Synergistic effect of Betulinic acid, Apigenin and Skimmianine (BASk) in high cholesterol diet rabbit: Involvement of CD36-TLR2 signaling pathway. Cytokine 2021; 142:155475. [PMID: 33667961 DOI: 10.1016/j.cyto.2021.155475] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 02/05/2021] [Accepted: 02/13/2021] [Indexed: 01/02/2023]
Abstract
BACKGROUND Progression of chronic inflammatory disease, atherosclerosis is a multifactorial process. Cluster of differentiation 36 (CD36) mediated downstream activation of Toll like receptor 2 (TLR2) and NLRP3 (Nucleotide-binding oligomerization domain-like receptor family pyrin domain-containing 3) inflammasome signaling pathway actively participates during chronic inflammation. Nowadays, synergistic combinations of bioactive compounds attained priority in the field of drug discovery and development as therapeutic agents. An investigation regarding the anti-inflammatory potential of a novel drug formulation, BASk which is a combination of three bioactive compounds Betulinic acid (B):Apigenin (A):Skimmianine (Sk) remains the focus area of this research study. We also elucidate the molecular mechanism behind the therapeutic potential of BASk through CD36 mediated activation TLR2-NLRP3 signaling pathway. METHODS OxLDL induced hPBMCs used to screen out a suitable combination of BASk via MTT, COX, LOX, NOS and MPO assays. Hypercholesterolemia is induced in rabbits by supplementing with 1% cholesterol + 0.5% cholic acid and treated with BASk (2:2:1) (5 mg/Kg) and atorvastatin (10 mg/Kg) for 60 days. CD36, TLR2, NLRP3, NFκB, cytokines, endothelial damage were quantified by reverse transcription, real time PCR, ELISA, flow cytometry and histopathology. RESULTS hPBMCs pretreated with BASk at 2:2:1 ratio significantly decreased the activities of COX, 15-LOX, NOS and MPO on OxLDL induction than quercetin. Down regulation of CD36, TLR2, MyD88, TRAF6 by BASk further buttressed NLRP3 inflammasome activation mediated by the transcription factor NFκB. This is in correlation with the effect of BASk by balancing pro (IL-1β, IL-18) and anti-inflammatory (TGF-β) mediators in the aortic endothelial cells. CONCLUSION BASk exerted its anti-inflammatory potential by reducing pro-inflammatory mediators during cholesterol supplementation via down regulating CD36 mediated TLR2 - NLRP3 inflammasome cascade. This deciphers a synergistic combination named BASk (2:2:1) as a novel drug formulation against chronic inflammatory disease, atherosclerosis.
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Affiliation(s)
- Vidya Sabu
- Department of Biochemistry, Research Centre, University of Kerala, Kariavattom Campus, Thiruvananthapuram, 695581 Kerala, India
| | - Santhi Krishnan
- Department of Biochemistry, Research Centre, University of Kerala, Kariavattom Campus, Thiruvananthapuram, 695581 Kerala, India
| | - Jasmine Peter
- Department of Biochemistry, Research Centre, University of Kerala, Kariavattom Campus, Thiruvananthapuram, 695581 Kerala, India
| | - I S Aswathy
- Department of Biochemistry, Research Centre, University of Kerala, Kariavattom Campus, Thiruvananthapuram, 695581 Kerala, India
| | - S S Lal Preethi
- Department of Biochemistry, Research Centre, University of Kerala, Kariavattom Campus, Thiruvananthapuram, 695581 Kerala, India
| | - Monisha Simon
- Department of Biochemistry, Research Centre, University of Kerala, Kariavattom Campus, Thiruvananthapuram, 695581 Kerala, India
| | | | - A Helen
- Department of Biochemistry, Research Centre, University of Kerala, Kariavattom Campus, Thiruvananthapuram, 695581 Kerala, India.
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Gupta M, Patel S. Nature-derived Quinolines and Isoquinolines: A Medicinal Chemistry Perspective. CURRENT TRADITIONAL MEDICINE 2021. [DOI: 10.2174/2215083805666190614115701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Quinoline and isoquinoline motifs are commonly encountered in natural products
of diverse origins. These moderately basic fused-heterocyclic rings containing natural
products are adorned with remarkable biological activities with clinical use in various diseases
demonstrating nature elegance and creativity. Therefore, these privileged rings have
attracted profound interest from the scientific community. In this perspective, we have discussed
medicinal chemistry perspective of the natural products containing quinoline and
isoquinoline scaffolds.
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Affiliation(s)
- Mohit Gupta
- Division of Medicinal Chemistry, Graduate School of Pharmaceutical Sciences, Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, United States
| | - Saloni Patel
- Division of Medicinal Chemistry, Graduate School of Pharmaceutical Sciences, Duquesne University, 600 Forbes Avenue, Pittsburgh, Pennsylvania 15282, United States
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Fatima GN, Paliwal SK, Saraf SK. Synthesis and Antimicrobial Activity of Some Novel 7-Chloro-4-aminoquinoline Derivatives. RUSS J GEN CHEM+ 2021. [DOI: 10.1134/s1070363221020171] [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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Bisht R, Bhattacharyya A, Shrivastava A, Saxena P. An Overview of the Medicinally Important Plant Type III PKS Derived Polyketides. FRONTIERS IN PLANT SCIENCE 2021; 12:746908. [PMID: 34721474 PMCID: PMC8551677 DOI: 10.3389/fpls.2021.746908] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2021] [Accepted: 09/08/2021] [Indexed: 05/06/2023]
Abstract
Plants produce interesting secondary metabolites that are a valuable source of both medicines for human use, along with significant advantages for the manufacturer species. The active compounds which lead to these instrumental effects are generally secondary metabolites produced during various plant growth phases, which provide the host survival advantages while affecting human health inadvertently. Different chemical classes of secondary metabolites are biosynthesized by the plant type III polyketide synthases (PKSs). They are simple homodimeric proteins with the unique mechanistic potential to produce a broad array of secondary metabolites by utilizing simpler starter and extender units. These PKS derived products are majorly the precursors of some important secondary metabolite pathways leading to products such as flavonoids, stilbenes, benzalacetones, chromones, acridones, xanthones, cannabinoids, aliphatic waxes, alkaloids, anthrones, and pyrones. These secondary metabolites have various pharmaceutical, medicinal and industrial applications which make biosynthesizing type III PKSs an important tool for bioengineering purposes. Because of their structural simplicity and ease of manipulation, these enzymes have garnered interest in recent years due to their application in the generation of unnatural natural polyketides and modified products in the search for newer drugs for a variety of health problems. The following review covers the biosynthesis of a variety of type III PKS-derived secondary metabolites, their biological relevance, the associated enzymes, and recent research.
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Huang AC, Lin CS, Lien JC, Lai HC, Lin WH, Lin CW. Ethyl 2-anilino-4-oxo-4,5-dihydrofuran-3-carboxylate exhibits anti-proliferative activity and induces apoptosis in promyelocytic leukemia HL-60 cells. Oncol Lett 2020; 19:2397-2403. [PMID: 32194739 PMCID: PMC7039143 DOI: 10.3892/ol.2020.11342] [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: 08/01/2019] [Accepted: 12/05/2019] [Indexed: 11/05/2022] Open
Abstract
Furoquinolone and its derivatives exhibit antimicrobial, anti-allergic, anti-inflammatory and anticancer properties. The present study investigated the anti-tumor activity of synthesized intermediates of furoquinolone in human promyelocytic leukemia HL-60 cells. The biological effects of the active compound ethyl 2-anilino-4-oxo-4,5-dihydrofuran-3-carboxylate (compound 131) were examined in HL-60 cells. The following properties were analyzed: Cell survival, cell cycle profile, caspase-3 activity, Bax and Bcl-2 expression, the amount of intracellular Ca2+, the number of reactive oxygen species (ROS) and the mitochondrial membrane potential. Compound 131 (50% cytotoxic concentration, 23.5 µM) significantly reduced the proliferation of HL-60 cells and was revealed to induce apoptosis in HL-60 cells in a concentration-dependent manner. Moreover, this was associated with the activation of caspase-3, upregulation of Bax, an increase in intracellular Ca2+ and ROS production, and a decrease in mitochondrial membrane potential and Bcl-2 expression levels. Compound 131, a novel 4,5-dihydrofuran-3-carboxylate, induced apoptosis in HL-60 cells via the increase of intracellular Ca2+ and ROS to alter the mitochondrial membrane potential and the protein level of Bax and Bcl-2, as well as activating caspase-3. The results of the current study indicate that compound 131 may represent a promising compound for the development of anti-leukemia therapeutics.
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Affiliation(s)
- An-Cheng Huang
- Department of Nursing, St. Mary's Junior College of Medicine, Nursing and Management, Yilan 26647, Taiwan, R.O.C
| | - Chen-Sheng Lin
- Division of Gastroenterology, Kuang Tien General Hospital, Taichung 43303, Taiwan, R.O.C
| | - Jin-Cherng Lien
- School of Pharmacy, China Medical University, Taichung 40402, Taiwan, R.O.C
| | - Hsueh-Chou Lai
- Division of Hepato-Gastroenterology, Department of Internal Medicine, China Medical University Hospital, Taichung 40447, Taiwan, R.O.C
| | - Wei-Hua Lin
- Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung 40402, Taiwan, R.O.C
| | - Cheng-Wen Lin
- Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung 40402, Taiwan, R.O.C.,Department of Biotechnology, Asia University, Wufeng, Taichung 41354, Taiwan, R.O.C.,Chinese Medicine Research Center, China Medical University, Taichung 40402, Taiwan, R.O.C
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Patil MD, Liu RS. Direct access to benzofuro[2,3-b]quinoline and 6H-chromeno[3,4-b]quinoline cores through gold-catalyzed annulation of anthranils with arenoxyethynes and aryl propargyl ethers. Org Biomol Chem 2019; 17:4452-4455. [DOI: 10.1039/c9ob00468h] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
This work reports a facile annulation of anthranils with aryloxyethynes or aryl propargyl ethers to construct useful benzofuro[2,3-b]quinoline and 6H-chromeno[3,4-b]quinoline frameworks, respectively.
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Affiliation(s)
- Manoj D. Patil
- Frontier Research Center for Matter Science and Technology
- Department of Chemistry
- National Tsing-Hua University
- Hsinchu
- Republic of China
| | - Rai-Shung Liu
- Frontier Research Center for Matter Science and Technology
- Department of Chemistry
- National Tsing-Hua University
- Hsinchu
- Republic of China
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Shang XF, Morris-Natschke SL, Liu YQ, Guo X, Xu XS, Goto M, Li JC, Yang GZ, Lee KH. Biologically active quinoline and quinazoline alkaloids part I. Med Res Rev 2018; 38:775-828. [PMID: 28902434 PMCID: PMC6421866 DOI: 10.1002/med.21466] [Citation(s) in RCA: 192] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 07/18/2017] [Accepted: 08/02/2017] [Indexed: 01/11/2023]
Abstract
Quinoline and quinazoline alkaloids, two important classes of N-based heterocyclic compounds, have attracted tremendous attention from researchers worldwide since the 19th century. Over the past 200 years, many compounds from these two classes were isolated from natural sources, and most of them and their modified analogs possess significant bioactivities. Quinine and camptothecin are two of the most famous and important quinoline alkaloids, and their discoveries opened new areas in antimalarial and anticancer drug development, respectively. In this review, we survey the literature on bioactive alkaloids from these two classes and highlight research achievements prior to the year 2008 (Part I). Over 200 molecules with a broad range of bioactivities, including antitumor, antimalarial, antibacterial and antifungal, antiparasitic and insecticidal, antiviral, antiplatelet, anti-inflammatory, herbicidal, antioxidant and other activities, were reviewed. This survey should provide new clues or possibilities for the discovery of new and better drugs from the original naturally occurring quinoline and quinazoline alkaloids.
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Affiliation(s)
- Xiao-Fei Shang
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
- Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, P.R. China
| | - Susan L. Morris-Natschke
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina
| | - Ying-Qian Liu
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Xiao Guo
- Key Laboratory of Veterinary Pharmaceutical Development of Ministry of Agriculture, Lanzhou Institute of Husbandry and Pharmaceutical Sciences, Chinese Academy of Agricultural Sciences, Lanzhou, P.R. China
| | - Xiao-Shan Xu
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Masuo Goto
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina
| | - Jun-Cai Li
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Guan-Zhou Yang
- School of Pharmacy, Lanzhou University, Lanzhou, P.R. China
| | - Kuo-Hsiung Lee
- Natural Products Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, North Carolina
- Chinese Medicine Research and Development Center, China Medical University and Hospital, Taichung, Taiwan
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Huang A, Xu H, Zhan R, Chen W, Liu J, Chi Y, Chen D, Ji X, Luo C. Metabolic Profile of Skimmianine in Rats Determined by Ultra-Performance Liquid Chromatography Coupled with Quadrupole Time-of-Flight Tandem Mass Spectrometry. Molecules 2017; 22:molecules22040489. [PMID: 28333075 PMCID: PMC6154341 DOI: 10.3390/molecules22040489] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 03/05/2017] [Accepted: 03/15/2017] [Indexed: 11/16/2022] Open
Abstract
Skimmianine is a furoquinoline alkaloid present mainly in the Rutaceae family. It has been reported to have analgesic, antispastic, sedative, anti-inflammatory, and other pharmacologic activities. Despite its critical pharmacological function, its metabolite profiling is still unclear. In this study, the in vivo metabolite profiling of skimmianine in rats was investigated using ultra-performance liquid chromatography coupled with quadrupole time-of-flight tandem mass spectrometry (UPLC/Q-TOF-MS). The metabolites were predicted using MetabolitePilotTM software. These predicted metabolites were further analyzed by MS² spectra, and compared with the detailed fragmentation pathway of the skimmianine standard and literature data. A total of 16 metabolites were identified for the first time in rat plasma, urine, and feces samples after oral administration of skimmianine. Skimmianine underwent extensive Phase I and Phase II metabolism in rats. The Phase I biotransformations of skimmianine consist of epoxidation of olefin on its furan ring (M1) followed by the hydrolysis of the epoxide ring (M4), hydroxylation (M2, M3), O-demethylation (M5-M7), didemethylation (M14-M16). The Phase II biotransformations include glucuronide conjugation (M8-M10) and sulfate conjugation (M11-M13). The epoxidation of 2,3-olefinic bond followed by the hydrolysis of the epoxide ring and O-demethylation were the major metabolic pathways of skimmianine. The results provide key information for understanding the biotransformation processes of skimmianine and the related furoquinoline alkaloids.
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Affiliation(s)
- Aihua Huang
- Key Laboratory of Ministry of Education, Research Center of Chinese Herbal Resources and Engineering, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Hui Xu
- Key Laboratory of Ministry of Education, Research Center of Chinese Herbal Resources and Engineering, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Ruoting Zhan
- Key Laboratory of Ministry of Education, Research Center of Chinese Herbal Resources and Engineering, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Weiwen Chen
- Key Laboratory of Ministry of Education, Research Center of Chinese Herbal Resources and Engineering, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Jiawei Liu
- Key Laboratory of Ministry of Education, Research Center of Chinese Herbal Resources and Engineering, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Yuguang Chi
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Daidi Chen
- School of Chinese Materia Medica, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Xiaoyu Ji
- Key Laboratory of Ministry of Education, Research Center of Chinese Herbal Resources and Engineering, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Chaoquan Luo
- Key Laboratory of Ministry of Education, Research Center of Chinese Herbal Resources and Engineering, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
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Shan XF, Meng QF, Kang YH, Bian Y, Gao YH, Wang WL, Qian AD. Isolation of active compounds from methanol extracts of Toddalia asiatica against Ichthyophthirius multifiliis in goldfish (Carassius auratus). Vet Parasitol 2014; 199:250-4. [DOI: 10.1016/j.vetpar.2013.10.021] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 10/25/2013] [Accepted: 10/28/2013] [Indexed: 10/26/2022]
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Resmi MS, Verma P, Gokhale RS, Soniya EV. Identification and characterization of a type III polyketide synthase involved in quinolone alkaloid biosynthesis from Aegle marmelos Correa. J Biol Chem 2013; 288:7271-81. [PMID: 23329842 DOI: 10.1074/jbc.m112.429886] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Quinolone alkaloids, found abundantly in the roots of bael (Aegle marmelos), possess various biological activities and have recently gained attention as potential lead molecules for novel drug designing. Here, we report the characterization of a novel Type III polyketide synthase, quinolone synthase (QNS), from A. marmelos that is involved in the biosynthesis of quinolone alkaloid. Using homology-based structural modeling, we identify two crucial amino acid residues (Ser-132 and Ala-133) at the putative QNS active site. Substitution of Ser-132 to Thr and Ala-133 to Ser apparently constricted the active site cavity resulting in production of naringenin chalcone from p-coumaroyl-CoA. Measurement of steady-state kinetic parameters demonstrates that the catalytic efficiency of QNS was severalfold higher for larger acyl-coenzymeA substrates as compared with smaller precursors. Our mutagenic studies suggest that this protein might have evolved from an evolutionarily related member of chalcone synthase superfamily by mere substitution of two active site residues. The identification and characterization of QNS offers a promising target for gene manipulation studies toward the production of novel alkaloid scaffolds.
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Affiliation(s)
- Mohankumar Saraladevi Resmi
- Plant Molecular Biology Division, Rajiv Gandhi Centre for Biotechnology, Thycaud (P.O), Thiruvananthapuram, 695 014 Kerala, India
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Yang ZD, Zhang DB, Ren J, Yang MJ. Skimmianine, a furoquinoline alkaloid from Zanthoxylum nitidum as a potential acetylcholinesterase inhibitor. Med Chem Res 2011. [DOI: 10.1007/s00044-011-9581-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Li SG, Tian HY, Ye WC, Jiang RW. Benzopyrans and furoquinoline alkaloids from Melicope pteleifolia. BIOCHEM SYST ECOL 2011. [DOI: 10.1016/j.bse.2011.01.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ukrainets IV, Bereznyakova NL, Turov AV. 4-Hydroxy-2-quinolones 147. Synthesis and tautomerism of 2-methyl-9H-furo-[2,3-b]quinolin-4-one. Chem Heterocycl Compd (N Y) 2008. [DOI: 10.1007/s10593-008-0118-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Raghavendra M, Naik HSB, Sherigara BS. Microwave-assisted one-pot synthesis of some new furo[2,3-b]quinolines using potassium carbonate under solvent-free conditions. CAN J CHEM 2007. [DOI: 10.1139/v07-124] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A rapid, solvent-free microwave-assisted method has been developed for the synthesis of novel furo quinolines. The title compounds were achieved by the reaction between corresponding 2-hydroxy-3-formyl-quinolines (1a–1c) with chloroacetamide, ethylchloroacetate, and phenacylbromide in specially designed microwave (MW) oven for organic synthesis in unsealed borosil vessel in presence of potassium carbonate. In this method, isolation is accomplished by just treating the reaction mixture with water, and products were obtained in high yield. Hence, this method was found to be very effective and ecofriendly. The structure of the newly synthesized compounds has been evaluated on the basis of analytical, IR, 1H NMR, and mass spectral data.Key words: furoquinoline, microwave irradiation, potassium carbonate, solvent-free conditions.
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Chen YL, Chen IL, Lu CM, Tzeng CC, Tsao LT, Wang JP. Synthesis and anti-inflammatory evaluation of 4-anilinofuro[2,3-b]quinoline and 4-phenoxyfuro[2,3-b]quinoline derivatives. Part 3. Bioorg Med Chem 2004; 12:387-92. [PMID: 14723957 DOI: 10.1016/j.bmc.2003.10.051] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Mast cells, neutrophils and macrophages are important inflammatory cells that have been implicated in the pathogenesis of acute and chronic inflammatory diseases. To explore a novel anti-inflammatory agent, we have synthesized certain 4-anilinofuro[2,3-b]quinoline and 4-phenoxyfuro[2,3-b]quinoline derivatives and evaluated their anti-inflammatory activities by reaction of 3,4-dichlorofuro[2,3-b]quinoline with appropriate Ar-NH(2) or Ar-OH. Compounds 6a and 15 were proved to be more potent than the reference inhibitor, mepacrine for the inhibition of rat peritoneal mast cell degranulation with IC(50) values of 6.5 and 16.4 microM, respectively. Compounds 2b, 6a, 10, and 15 also showed potent inhibitory activity (IC(50)=7.2-29.4 microM) for the secretion of lysosomal enzyme and beta-glucuronidase from neutrophils. These results also indicated that oxime derivatives are more potent than the respective ketone precursors (6a> or =2a; 7a> or =3), and the substituent such as Me at the oxime decreased inhibitory activity (6a> or =6b; 7a> or =7b). Among these derivatives, compound 6a showed the most potent activity with IC(50) values of 6.5-11.6 microM for the inhibition of mast cell degranulation and neutrophil degranulation.
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Affiliation(s)
- Yeh-Long Chen
- Faculty of Medicinal and Applied Chemistry, College of Life Science, Kaohsiung Medical University, Kaohsiung City 807, Taiwan.
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Abstract
Applications of capillary electrophoresis (CE) for analysis of phytochemical substances (e.g. flavonoids, alkaloids, terpenoids, phenolic acid, quinones and coumarins) are reviewed. For example, CE analysis of sixteen tea ingredients were achieved within 10 min with the good precision (RSDs% <1% for intra-day and 2% for inter-day) and linearity (R(2)>0.990). Quantitation of sanguinarine and chelerythrine, alkaloids from Sanguinaria canadensis L. or Macleaya cordata (Wild) Br. R. by CE showed excellent linearity (R(2)>0.998), precision (RSD%=1.8%) and detection limit (2.4-3.0 microM). Determination of antraquinone-1-sulphonate was also obtained by this technique with good linearity (R(2)>0.9999), precision (RSD%=2%) and detection limit (0.7 microg/ml). Results of CE analysis from several studies are comparable to those of high performance liquid chromatography (HPLC), but the former is more useful for complex mixture samples where the analysis demands higher resolving power. Advantages of CE are high efficiency, low cost, short analysis time and simplicity, whereas disadvantages include low sensitivity comparing to HPLC and limitation of the preparative scale.
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Affiliation(s)
- Leena Suntornsuk
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Mahidol University, 447 Sri-Ayudhaya Road, Rajathevee, Bangkok, Thailand.
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