101
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Ravishankar D, Watson KA, Greco F, Osborn HMI. Novel synthesised flavone derivatives provide significant insight into the structural features required for enhanced anti-proliferative activity. RSC Adv 2016. [DOI: 10.1039/c6ra11041j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Synthesis and antiproliferative evaluation of a library of 76 methoxy and hydroxy flavones, and their 4-thio analogues showed that the novel thioflavones 15f and 16f exhibit 7–46 fold greater anti-proliferative potency than the natural flavone chrysin (2d).
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102
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Wu Q, Wang Z, Li J, Qiu S, Cao D, Liu Z, Guan R. 3-Hydroxyflavone derivatives synthesized by a new simple method as chemosensors for cyanide anions. RSC Adv 2016. [DOI: 10.1039/c6ra11415f] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Two 3-hydroxyflavone derivatives as chemosensors for cyanide were synthesized by one step simple condensation, cyclization and subsequent oxidation reaction catalyzed by pyrrolidine, which shows great convenience compared with traditional method.
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Affiliation(s)
- Qianqian Wu
- School of Material Science and Engineering
- Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials
- University of Jinan
- Jinan 250022
- China
| | - Zian Wang
- School of Material Science and Engineering
- Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials
- University of Jinan
- Jinan 250022
- China
| | - Jiale Li
- School of Material Science and Engineering
- Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials
- University of Jinan
- Jinan 250022
- China
| | - Shuang Qiu
- School of Material Science and Engineering
- Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials
- University of Jinan
- Jinan 250022
- China
| | - Duxia Cao
- School of Material Science and Engineering
- Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials
- University of Jinan
- Jinan 250022
- China
| | - Zhiqiang Liu
- State Key Laboratory of Crystal Materials
- Shandong University
- Jinan 250100
- China
| | - Ruifang Guan
- School of Material Science and Engineering
- Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials
- University of Jinan
- Jinan 250022
- China
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103
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Zhu F, Li Y, Wang Z, Wu XF. Highly efficient synthesis of flavones via Pd/C-catalyzed cyclocarbonylation of 2-iodophenol with terminal acetylenes. Catal Sci Technol 2016. [DOI: 10.1039/c6cy00613b] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly efficient and selective Pd/C-catalyzed carbonylation reaction for the synthesis of flavones has been developed. Various flavone derivatives were isolated in excellent yields with excellent functional group tolerances. The catalyst is reusable, and no phosphine ligand or inert gas protection is needed.
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Affiliation(s)
- Fengxiang Zhu
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - Yahui Li
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - Zechao Wang
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
| | - Xiao-Feng Wu
- Leibniz-Institut für Katalyse e.V. an der Universität Rostock
- 18059 Rostock
- Germany
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104
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Choi YS, Kim DM, Kim YJ, Yang S, Lee KT, Ryu JH, Jeong JH. Synthesis and Evaluation of Neuroprotective Selenoflavanones. Int J Mol Sci 2015; 16:29574-82. [PMID: 26690420 PMCID: PMC4691131 DOI: 10.3390/ijms161226188] [Citation(s) in RCA: 7] [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: 11/01/2015] [Revised: 11/30/2015] [Accepted: 12/04/2015] [Indexed: 11/16/2022] Open
Abstract
The physicochemical properties and antioxidant activity of a molecule could be improved by the substitution of an oxygen atom in a molecule with selenium. We synthesized selenoflavanones and flavanones to evaluate their neuroprotective effects. The selenoflavanones showed improved physicochemical properties, suggestive of the ability to pass through the blood-brain barrier (BBB). They showed in vitro antioxidant effects against hydrogen peroxide, and did not result in severe cytotoxicity. Moreover, infarction volumes in a transient ischemia mouse model were significantly reduced by the selenoflavanone treatments.
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Affiliation(s)
- Yong-Sung Choi
- College of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 21983, Korea.
| | - Dong-Myung Kim
- Office of Research Affairs, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03720, Korea.
| | - Yoon-Jung Kim
- College of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 21983, Korea.
| | - Sai Yang
- College of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 21983, Korea.
| | - Kyung-Tae Lee
- College of Pharmacy, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02453, Korea.
| | - Jong Hoon Ryu
- College of Pharmacy, Kyung Hee University, 26 Kyungheedae-ro, Dongdaemun-gu, Seoul 02453, Korea.
| | - Jin-Hyun Jeong
- College of Pharmacy, Yonsei Institute of Pharmaceutical Sciences, Yonsei University, 85 Songdogwahak-ro, Yeonsu-gu, Incheon 21983, Korea.
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105
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ent-Kauranoids isolated from Isodon eriocalyx var. laxiflora and their structure activity relationship analyses. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.09.066] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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106
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Metal-free methodology for the preparation of sterically hindered alkynoylphenols and its application to the synthesis of flavones and aurones. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.05.097] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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107
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Metabolites software-assisted flavonoid hunting in plants using ultra-high performance liquid chromatography-quadrupole-time of flight mass spectrometry. Molecules 2015; 20:3955-71. [PMID: 25738538 PMCID: PMC6272731 DOI: 10.3390/molecules20033955] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2015] [Revised: 02/17/2015] [Accepted: 02/25/2015] [Indexed: 12/31/2022] Open
Abstract
Plant secondary metabolism drives the generation of metabolites used for host plant resistance, as biopesticides and botanicals, even for the discovery of new therapeutics for human diseases. Flavonoids are one of the largest and most studied classes of specialized plant metabolites. To quickly identify the potential bioactive flavonoids in herbs, a metabolites software-assisted flavonoid hunting approach was developed, which mainly included three steps: firstly, utilizing commercial metabolite software, a flavonoids database was established based on the biosynthetic pathways; secondly, mass spectral data of components in herbs were acquired by ultra-high performance liquid chromatography-quadrupole-time of flight mass spectrometry (UHPLC-Q-TOF-MS); and finally, the acquired LC-MS data were imported into the database and the compounds in the herbs were automatically identified by comparison of their mass spectra with the theoretical values. As a case study, the flavonoids in Smilax glabra were profiled using this approach. As a result, 104 flavonoids including 27 potential new compounds were identified. To our knowledge, this is the first report on profiling the components in the plants utilizing the plant metabolic principles with the assistance of metabolites software. This approach can be extended to the analysis of flavonoids in other plants.
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108
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Ruiu S, Anzani N, Orrù A, Floris C, Caboni P, Alcaro S, Maccioni E, Distinto S, Cottiglia F. Methoxyflavones from Stachys glutinosa with binding affinity to opioid receptors: in silico, in vitro, and in vivo studies. JOURNAL OF NATURAL PRODUCTS 2015; 78:69-76. [PMID: 25562563 DOI: 10.1021/np500671v] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Fractionation of the bioactive dichloromethane extract from the aerial parts of Stachys glutinosa led to the isolation of four flavones, xanthomicrol (1), sideritoflavone (2), 8-methoxycirsilineol (3), and eupatilin (4), along with two neo-clerodane diterpenes, roseostachenone (8) and a new compound, 3α,4α-epoxyroseostachenol (7). In order to study structure-activity relationships, two methoxyflavones [5-demethyltangeretin (5) and tangeretin (6)] were synthesized by the methoxylation of xanthomicrol. The isolated compounds (1-4, 7, and 8) as well as the xanthomicrol semisynthetic derivatives (5 and 6) were evaluated for their binding affinity to the μ and δ opioid receptors. Xanthomicrol was the most potent binder to both μ and δ receptors, with a Ki value of 0.83 and 3.6 μM, respectively. Xanthomicrol administered intraperitoneally in mice at a dose of 80 mg/kg significantly reduced morphine-induced antinociception in the tail flick test. Our results suggested that xanthomicrol is a μ opioid receptor antagonist. Docking experiments were carried out to acquire a deeper understanding about important structural aspects of binding of xanthomicrol. In summary, these data suggest that xanthomicrol is a valuable structure for further development into a potential μ opioid receptor antagonist.
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Affiliation(s)
- Stefania Ruiu
- Institute of Translational Pharmacology, UOS of Cagliari, National Research Council, Parco Scientifico e Tecnologico , Pula, Cagliari, Italy
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109
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Chen JF, Liu ZQ. Ferrocenyl-Appended Aurone and Flavone: Which Possesses Higher Inhibitory Effects on DNA Oxidation and Radicals? Chem Res Toxicol 2014; 28:451-9. [DOI: 10.1021/tx500405b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Jia-Feng Chen
- Department of Organic Chemistry,
College of Chemistry, Jilin University, No. 2519 Jiefang Road, Changchun 130021, China
| | - Zai-Qun Liu
- Department of Organic Chemistry,
College of Chemistry, Jilin University, No. 2519 Jiefang Road, Changchun 130021, China
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110
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Xiao J, Ni X, Kai G, Chen X. Advance in Dietary Polyphenols as Aldose Reductases Inhibitors: Structure-Activity Relationship Aspect. Crit Rev Food Sci Nutr 2014; 55:16-31. [PMID: 25105846 DOI: 10.1080/10408398.2011.584252] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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111
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Mikšátková P, Ancheeva E, Hejtmánková K, Teslov L, Lapčík O. Determination of Flavonoids inStellariaby High-Performance Liquid Chromatography–Tandem Mass Spectrometry. ANAL LETT 2014. [DOI: 10.1080/00032719.2014.908382] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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112
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Copper-mediated trimethylsilyl azide in amination of bromoflavonoids to synthesize unique aminoflavonoids. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.04.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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113
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Yang WZ, Qiao X, Bo T, Wang Q, Guo DA, Ye M. Low energy induced homolytic fragmentation of flavonol 3-O-glycosides by negative electrospray ionization tandem mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2014; 28:385-395. [PMID: 24395506 DOI: 10.1002/rcm.6794] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2013] [Revised: 11/16/2013] [Accepted: 11/24/2013] [Indexed: 06/03/2023]
Abstract
RATIONALE Negative ESI-QIT-MS of several subtypes of flavonoid O-glycosides is known to produce deprotonated molecular ions which undergo homolytic fragmentation at the glycosidic bond upon collision-induced dissociation (CID). However, these subtypes have never been simultaneously compared under unified MS conditions. METHODS The (-)-ESI-MS(n) fragmentations of 69 flavonoid O-glycosides, involving eight subtypes, were analyzed using a quadrupole ion-trap mass spectrometer with collision energies varying from 18-44%. Factors influencing the homolytic glycosidic bond fragmentation, such as collision energy, hydroxylation of aglycone, and glycosylation pattern, were comprehensively studied. RESULTS Under the unified CID-QIT-MS(2) conditions, the precursor deprotonated molecular ions [M-H](-) for 3-O-glycosyl, 3,7-di-O-glycosyl and 3,6,7-tri-O-glycosyl flavonols experienced homolytic fragmentation at the glycosidic bond and generated the radical aglycone ion [Y0-H](-•). This gas-phase CID fragmentation behavior was not observed for the other subtypes. A general trend was found that hydroxyl substitution at C-6, glycosylation at C-6/C-7, and acetylation of the saccharide moiety remarkably suppressed this fragmentation. In addition, flavonol 3-O-diglycosides (disaccharides) possessing a 1 → 2 glycosidic bond generated more abundant [Y0-H](-•) product ions than those with a 1 → 3 or 1 → 6 bond. The terminal sugar triggered the homolytic fragmentation in the order Rha > Xyl > Glc. Moreover, new counterexamples were found for previously reported fragmentation rules. CONCLUSIONS The low-energy CID homolytic fragmentation was diagnostic for structural identification of flavonol 3-O-glycosides. We have summarized key factors affecting this fragmentation. The results could be useful for rapid characterization of flavonoid O-glycosides in complicated herbal extracts.
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Affiliation(s)
- Wen-Zhi Yang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing, 100191, China
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114
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Rocha DHA, Pinto DCGA, Seixas RSGR, Silva AMS. 3-Methylflavones characterization revisited: complete assignment of 1H and 13C NMR data. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2014; 52:47-50. [PMID: 24214312 DOI: 10.1002/mrc.4026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Revised: 10/06/2013] [Accepted: 10/08/2013] [Indexed: 06/02/2023]
Abstract
Ten 3-methylflavone derivatives were studied. Previously reported NMR data of some derivatives were corrected and/or completed, including the complete assignment of the two known natural derivatives. The complete (1)H and (13)C NMR assignments were achieved by combination of one-dimensional and two-dimensional NMR experiments.
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Affiliation(s)
- Djenisa H A Rocha
- Department of Chemistry and QOPNA, University of Aveiro, Aveiro, Portugal
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115
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Jeong JH, Choi YS, Kim YJ, Yeun Lee J, Lee J. Synthesis and Evaluation of Selenoflavones That Have Potential Neuroprotective Effects. HETEROCYCLES 2014. [DOI: 10.3987/com-14-13112] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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116
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117
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Lopes SP, Menezes JC, Hackbarth S, Pinto DC, Faustino MA, Silva AM, Neves MG, Röder B, Cavaleiro JA. New flavonoid–porphyrin conjugates via Buchwald–Hartwig amination: synthesis and photophysical studies. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.07.089] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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118
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Ribeiro D, Freitas M, Tomé SM, Silva AMS, Porto G, Fernandes E. Modulation of human neutrophils' oxidative burst by flavonoids. Eur J Med Chem 2013; 67:280-92. [PMID: 23871908 DOI: 10.1016/j.ejmech.2013.06.019] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Revised: 06/02/2013] [Accepted: 06/03/2013] [Indexed: 10/26/2022]
Abstract
Inflammation is a normal response towards tissue injury, but may become deleterious to the organism if uncontrolled. The overproduction of reactive species during the inflammatory process may cause or magnify the damage at inflammatory sites. Flavonoids have been suggested as therapeutic agents to avoid such damage, as these compounds exhibit anti-inflammatory activity, through the modulation of oxidative stress and signalling pathways. Both effects may attenuate neutrophils' activities at inflammatory sites. In this study, we investigated the structure/activity relationship of a series of flavonoids on the oxidative burst of human neutrophils in vitro, as a measure of its anti-inflammatory potential. Neutrophils were stimulated with phorbol-12-myristate-13-acetate, and fluorescence and chemiluminescence techniques were used to evaluate the generation of reactive oxygen species. All the tested flavonoids revealed the ability to modulate the neutrophil's oxidative burst. From the obtained results, the pivotal role of the catechol group in the B-ring was evidenced as well as the minor importance of the hydroxylations in the A-ring, which did not appear to be determinant for the activity, although clearly influencing the lipophilicity of the tested flavonoids. It is also clarified the importance of the methylation in the OH group at the B-ring catechol moiety. In conclusion, the obtained results uncover new possible strategies for the resolution of inflammatory processes, using flavonoids to modulate neutrophil's oxidative burst.
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Affiliation(s)
- Daniela Ribeiro
- REQUIMTE, Laboratório de Química Aplicada, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, 4050-313 Porto, Portugal
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119
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Schwarz MB, Kurzwernhart A, Roller A, Kandioller W, Keppler BK, Hartinger CG. Rhodium(Cp*) Compounds with Flavone-derived Ligand Systems: Synthesis and Characterization. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201300145] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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120
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Zhang S, Wan C, Wang Q, Zhang B, Gao L, Zha Z, Wang Z. Synthesis of Chromones through LiOtBu/Air-Mediated Oxidation and Regioselective Cyclization ofo-Hydroxyphenyl Propargyl Carbinols. European J Org Chem 2013. [DOI: 10.1002/ejoc.201201665] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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121
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Jin F, Gao D, Zhang C, Liu F, Chu B, Chen Y, Chen YZ, Tan C, Jiang Y. Exploration of 1-(3-chloro-4-(4-oxo-4H-chromen-2-yl)phenyl)-3-phenylurea derivatives as selective dual inhibitors of Raf1 and JNK1 kinases for anti-tumor treatment. Bioorg Med Chem 2013; 21:824-31. [DOI: 10.1016/j.bmc.2012.04.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2012] [Revised: 03/31/2012] [Accepted: 04/04/2012] [Indexed: 12/19/2022]
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122
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Wang S, Marcone MF, Barbut S, Lim LT. Fortification of dietary biopolymers-based packaging material with bioactive plant extracts. Food Res Int 2012. [DOI: 10.1016/j.foodres.2012.07.023] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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123
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124
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Wu XF, Neumann H, Beller M. Palladium-Catalyzed Carbonylation Reaction of Aryl Bromides with 2-Hydroxyacetophenones to Form Flavones. Chemistry 2012; 18:12595-8. [DOI: 10.1002/chem.201202141] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2012] [Indexed: 11/07/2022]
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125
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Shih TL, Hsiao CA, Lin ZY, Chen YH. An alternative synthesis of 3',4'-diaminoflavones to evaluate their antioxidant ability and cell apoptosis of zebrafish larvae. Molecules 2012; 17:8206-16. [PMID: 22777189 PMCID: PMC6268274 DOI: 10.3390/molecules17078206] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2012] [Revised: 07/02/2012] [Accepted: 07/06/2012] [Indexed: 11/16/2022] Open
Abstract
We described herein a concise synthesis of 3′,4′-diaminoflavone 10. This new, three-step synthetic approach is more efficient than the conventional seven-step synthetic method. The route is shortened significantly by introducing the amino moieties early and eliminating the need for nitro group reduction. The other two analogues, 5,7-dihydroxy-3′,4′-diaminoflavone 11 and 5,7-dimethoxy-3′,4′-diaminoflavone 12, were also synthesized similarly. The above three compounds, along with flavone, were evaluated for their antioxidant and UVB-protection abilities on zebrafish larvae. The data showed that compound 10 exhibited the best result, with −102.3% of ROS-scavenging rate.
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Affiliation(s)
- Tzenge-Lien Shih
- Authors to whom correspondence should be addressed; (T.-L.S.)(Y.-H.C.); Tel./Fax: +886-2-8631-5024 (T.-L.S.)
| | | | | | - Yau-Hung Chen
- Authors to whom correspondence should be addressed; (T.-L.S.)(Y.-H.C.); Tel./Fax: +886-2-8631-5024 (T.-L.S.)
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126
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Verma AK, Singh H, Satyanarayana M, Srivastava SP, Tiwari P, Singh AB, Dwivedi AK, Singh SK, Srivastava M, Nath C, Raghubir R, Srivastava AK, Pratap R. Flavone-based novel antidiabetic and antidyslipidemic agents. J Med Chem 2012; 55:4551-67. [PMID: 22524508 DOI: 10.1021/jm201107g] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The hybrid congeners 62-90 of 6- and 7-hydroxyflavones with aminopropanol have been synthesized and evaluated for their antidiabetic activity in sucrose-challenged low-dosed streptozotocin (STZ)-induced diabetic rats and db/db mice. The optical enantiomers 70a, 70b, 90a, and 90b of two congeners 70 and 90 exhibiting consistent antidiabetic and antidyslipidemic activities were also prepared, and their antidiabetic activity results indicate its association mainly with S isomers. These compounds also lower cholesterol and TG profiles while improving high-density lipoprotein cholesterol to CHOL ratio in db/db mice. The bioavailability of compound 70 and its isomer varies between 27 and 29% whereas that of the more polar compound 90a is poor as determined in rat by oral and intraperitoneal administrations.
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Affiliation(s)
- Alok K Verma
- Division of Medicinal & Process Chemistry, Central Drug Research Institute (CSIR), Lucknow-226001, India
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127
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128
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Jin F, Zhang N, Tan C, Gao D, Zhang C, Liu F, Chen Z, Gao C, Liu H, Li S, Jiang Y. 2′-Chloro-4′-aminoflavone Derivatives Selectively Targeting Hepatocarcinoma Cells: Convenient Synthetic Process, G2/M Cell Cycle Arrest and Apoptosis Triggers. Arch Pharm (Weinheim) 2012; 345:525-34. [DOI: 10.1002/ardp.201100383] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2011] [Revised: 01/18/2012] [Accepted: 02/16/2012] [Indexed: 11/07/2022]
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129
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Flavonoids as Anti-Inflammatory and Analgesic Drugs: Mechanisms of Action and Perspectives in the Development of Pharmaceutical Forms. BIOACTIVE NATURAL PRODUCTS 2012. [DOI: 10.1016/b978-0-444-53836-9.00026-8] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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130
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Caldwell ST, McPhail DB, Duthie GG, Hartley RC. Synthesis of polyhydroxylated flavonoids bearing a lipophilic decyl tail as potential therapeutic antioxidants. CAN J CHEM 2012. [DOI: 10.1139/v11-087] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Antioxidants have potential for the treatment of stroke and neurodegeneration, and chimeric compounds that combine a flavon-3-ol head group related to myricetin and a lipophilic decyl tail are known to protect membranes from oxidative damage at least as well as vitamin E. New flavon-3-ols that are highly hydroxylated in the B ring in ways not found in natural flavon-3-ols and bearing a lipophilic decyl tail have been prepared from trimethoxy- and tetramethoxybenzoic acids accessed by lithiation–carboxylation reactions. Direct enolate acylation was preferred over Baker–Venkataraman rearrangement when there were methoxy groups at both the 2- and the 6-position of the benzoic acid derivatives.
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Affiliation(s)
- Stuart T. Caldwell
- WestCHEM School of Chemistry, University of Glasgow, Glasgow, G12 8QQ Scotland, UK
| | - Donald B. McPhail
- Antoxis Limited, 5:16 Institute of Medical Sciences, Foresterhill, Aberdeen, AB25 2ZD Scotland, UK
| | - Garry G. Duthie
- Rowett Institute of Nutrition and Health, University of Aberdeen, Aberdeen AB21 9SB Scotland, UK
| | - Richard C. Hartley
- WestCHEM School of Chemistry, University of Glasgow, Glasgow, G12 8QQ Scotland, UK
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131
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Mijangos MV, González-Marrero J, Miranda LD, Vincent-Ruz P, Lujan-Montelongo A, Olivera-Díaz D, Bautista E, Ortega A, de la Luz Campos-González M, Gamez-Montaño R. Microwave-assisted C-3 selective oxidative radical alkylation of flavones. Org Biomol Chem 2012; 10:2946-9. [DOI: 10.1039/c2ob25249j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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132
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Yang WZ, Ye M, Qiao X, Wang Q, Bo T, Guo DA. Collision-induced dissociation of 40 flavonoid aglycones and differentiation of the common flavonoid subtypes using electrospray ionization ion-trap tandem mass spectrometry and quadrupole time-of-flight mass spectrometry. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2012; 18:493-503. [PMID: 23654194 DOI: 10.1255/ejms.1206] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Much Literature is available with respect to the collision-induced dissociation (CID) of different subtypes of flavonoid aglycones. However, a simultaneous comparison study of the common flavonoid subtypes under unified conditions is rarely reported, which is of crucial significance for their rapid structural elucidation. This study depicted the negative CID of 40 free flavonoids (comprising nine different subtypes) utilizing electrospray ionization ion-trap tandem mass spectrometry (ESI-IT-MSn). High-accuracy quadrupole time-of-flight mass spectrometry was employed to confirm the chemical formula of proposed key fragments. Specific fragmentation features were discovered among different flavonoid subtypes in terms of the essential collision energy, base peak, RDA fragmentation, and diversity of fragmentation pathways: CID of flavanones, chalcones and flavanonols was in need of lower Levels of collision energy [<40%) and exhibited simplified fragmentation pathways; overriding neutral loss of CO2 was detected for flavones, aurones and xanthones, while isoflavones preferred neutral loss of CO; 1,2A- and 1,3A- fragments were respectively dominant for flavonols and flavanones/chalcones, white homoisoflavones underwent specific radical elimination of ring B or methylene-ring B. These differentiated fragmentation characteristics integrating UV absorption resulted in the establishment of a decision tree to characterize and distinguish the common flavonoid subtypes. This study firstly revealed remarkable differentiations in the negative CID behavior of nine common flavonoid aglycone subtypes and the proposed determination strategy would much benefit the screening and rapid characterization of flavonoids from complicated matrixes by tandem mass spectrometry.
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Affiliation(s)
- Wen-Zhi Yang
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191, China
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The flavonoid eupatorin inactivates the mitotic checkpoint leading to polyploidy and apoptosis. Exp Cell Res 2011; 318:578-92. [PMID: 22227008 DOI: 10.1016/j.yexcr.2011.12.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2011] [Revised: 12/10/2011] [Accepted: 12/14/2011] [Indexed: 12/18/2022]
Abstract
The spindle assembly checkpoint (SAC) is a conserved mechanism that ensures the fidelity of chromosome distribution in mitosis by preventing anaphase onset until the correct bipolar microtubule-kinetochore attachments are formed. Errors in SAC function may contribute to tumorigenesis by inducing numerical chromosome anomalies (aneuploidy). On the other hand, total disruption of SAC can lead to massive genomic imbalance followed by cell death, a phenomena that has therapeutic potency. We performed a cell-based high-throughput screen with a compound library of 2000 bioactives for novel SAC inhibitors and discovered a plant-derived phenolic compound eupatorin (3',5-dihydroxy-4',6,7-trimethoxyflavone) as an anti-mitotic flavonoid. The premature override of the microtubule drug-imposed mitotic arrest by eupatorin is dependent on microtubule-kinetochore attachments but not interkinetochore tension. Aurora B kinase activity, which is essential for maintenance of normal SAC signaling, is diminished by eupatorin in cells and in vitro providing a mechanistic explanation for the observed forced mitotic exit. Eupatorin likely has additional targets since eupatorin treatment of pre-mitotic cells causes spindle anomalies triggering a transient M phase delay followed by impaired cytokinesis and polyploidy. Finally, eupatorin potently induces apoptosis in multiple cancer cell lines and suppresses cancer cell proliferation in organotypic 3D cell culture model.
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134
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Sousa RMS, Pinto DCGA, Silva AMS, Serra VV, Barros AIRNA, Faustino MAF, Neves MGPMS, Cavaleiro JAS. Flavone-Nitrogen Heterocycle Conjugate Formation by 1,3-Dipolar Cycloadditions. European J Org Chem 2011. [DOI: 10.1002/ejoc.201101185] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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135
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Ding D, Zhang B, Meng T, Ma Y, Wang X, Peng H, Shen J. Novel synthetic baicalein derivatives caused apoptosis and activated AMP-activated protein kinase in human tumor cells. Org Biomol Chem 2011; 9:7287-91. [PMID: 21901221 DOI: 10.1039/c1ob06094e] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Studies on the anti-proliferative activities of novel baicalein derivatives demonstrated that compounds 8 and 9 were able to activate AMPK by enhancing the levels of phosphorylated AMPKα, and showed more potent anti-proliferative effects than baicalein and AICAR in A431, SK-OV-3, DU 145 and HeLa cells, suggesting an alternative therapeutic approach for benzyl baicalein in cancer therapy.
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Affiliation(s)
- Derong Ding
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 555 Zuchongzhi Road, Shanghai 201203, PR China
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Fu H, Lin M, Katsumura Y, Muroya Y. Free-radical scavenging activities of silybin and its analogues: A pulse radiolysis study. INT J CHEM KINET 2011. [DOI: 10.1002/kin.20589] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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137
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138
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Chen JLY, Sperry J, Ip NY, Brimble MA. Natural products targeting telomere maintenance. MEDCHEMCOMM 2011. [DOI: 10.1039/c0md00241k] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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