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Nguyen TH, Kim MJ, Kim J. The transcription factor LBD10 sustains pollen tube growth and integrity by modulating reactive oxygen species homeostasis via the regulation of flavonol biosynthesis in Arabidopsis. THE NEW PHYTOLOGIST 2024; 244:131-146. [PMID: 39113420 DOI: 10.1111/nph.20029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 07/11/2024] [Indexed: 09/17/2024]
Abstract
Reproduction in angiosperms relies on the precise growth of pollen tubes, facilitating the delivery of sperm cells to the ovule for double fertilization. LATERAL ORGAN BOUNDARIES DOMAIN10 (LBD10), a plant-specific transcription factor, plays a pivotal role in Arabidopsis pollen development. Here, we uncovered LBD10's function in sustaining pollen tube growth and integrity. The lbd10 mutant exhibited elevated levels of reactive oxygen species (ROS) and hydrogen peroxide (H2O2) in both pollen grains and tubes, leading to compromised pollen tube growth. The inhibition of ROS synthesis and scavenging of excess ROS with an antioxidant treatment each alleviated these defects in lbd10. The lbd10 mutant displayed reduced flavonol accumulation in both pollen grains and tubes. All the altered phenotypes of lbd10 were complemented by expressing LBD10 under its native promoter. Exogenous application of flavonoids recused the defects in pollen tube growth and integrity in lbd10, along with reducing the excess levels of ROS and H2O2. LBD10 directly binds the promoters of key flavonol biosynthesis genes in chromatin and promotes reporter gene expression in Arabidopsis mesophyll protoplasts. Our findings indicate that LBD10 modulates ROS homeostasis by transcriptionally activating genes crucial for flavonol biosynthesis, thereby maintaining pollen tube growth and integrity.
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Affiliation(s)
- Thu-Hien Nguyen
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju, 61186, Korea
| | - Min Jung Kim
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju, 61186, Korea
| | - Jungmook Kim
- Department of Integrative Food, Bioscience and Biotechnology, Chonnam National University, Gwangju, 61186, Korea
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju, 61186, Korea
- Kumho Life Science Laboratory, Chonnam National University, Gwangju, 61186, Korea
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Imai K, Nakanishi I, Ohkubo K, Ohba Y, Arai T, Mizuno M, Fukuzumi S, Matsumoto KI, Fukuhara K. Synthesis of methylated quercetin analogues for enhancement of radical-scavenging activity. RSC Adv 2017. [DOI: 10.1039/c7ra02329d] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Methylation of the catechol moiety of quercetin resulted in the enhancement of its radical-scavenging activity.
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Affiliation(s)
- Kohei Imai
- School of Pharmacy
- Showa University
- Shinagawa-ku
- Japan
- Quantitative RedOx Sensing Team (QRST)
| | - Ikuo Nakanishi
- Quantitative RedOx Sensing Team (QRST)
- Department of Basic Medical Sciences for Radiation Damages
- National Institute of Radiological Sciences (NIRS)
- National Institutes for Quantum and Radiological Science and Technology (QST)
- Inage-ku
| | - Kei Ohkubo
- Quantitative RedOx Sensing Team (QRST)
- Department of Basic Medical Sciences for Radiation Damages
- National Institute of Radiological Sciences (NIRS)
- National Institutes for Quantum and Radiological Science and Technology (QST)
- Inage-ku
| | - Yusuke Ohba
- School of Pharmacy
- Showa University
- Shinagawa-ku
- Japan
| | - Takuya Arai
- School of Pharmacy
- Showa University
- Shinagawa-ku
- Japan
| | - Mirei Mizuno
- School of Pharmacy
- Showa University
- Shinagawa-ku
- Japan
| | - Shunichi Fukuzumi
- Department of Chemistry and Nano Science
- Ewha Womans University
- Seoul 120-750
- Korea
- Faculty of Science and Technology
| | - Ken-ichiro Matsumoto
- Quantitative RedOx Sensing Team (QRST)
- Department of Basic Medical Sciences for Radiation Damages
- National Institute of Radiological Sciences (NIRS)
- National Institutes for Quantum and Radiological Science and Technology (QST)
- Inage-ku
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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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Forbes AM, Lin H, Meadows GG, Meier GP. Synthesis and anticancer activity of new flavonoid analogs and inconsistencies in assays related to proliferation and viability measurements. Int J Oncol 2014; 45:831-42. [PMID: 24859601 PMCID: PMC4091967 DOI: 10.3892/ijo.2014.2452] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 03/14/2014] [Indexed: 12/15/2022] Open
Abstract
Flavonoids have been studied intensely for their ability to act as anti-carcinogenic, anti-inflammatory, anti-viral and anti-aging agents and are often marketed as supplements related to their anti-inflammatory activity. Previous studies have primarily focused on the effects of polar natural flavonoids. We examined the activity of novel hydrophobic and lipophilic flavonols against human DU-145 and PC-3 prostate cancer cell lines. All flavonol analogs were more active than the naturally occurring flavonols quercetin, kaempferol, kaempferide and galangin. The most potent analogs were 6.5-fold more active against DU-145 and PC-3 cells than quercetin and fell within the biologically relevant concentration range (low micromolar). We also evaluated the potential toxic effects of flavonol analogs on normal cells, an assessment that has frequently been ignored when studying the anticancer effects of flavonoids. During these analyses, we discovered that various metabolic and DNA staining assays were unreliable methods for assessing cell viability of flavonoids. Flavonoids reduce colorimetric dyes such as MTT and Alamar Blue in the absence of cells. We showed that flavonol-treated prostate cancer cells were stained less intensely with crystal violet than untreated cells at non-toxic concentrations. The trypan blue exclusion assay was selected as a reliable alternative for measuring cell viability.
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Affiliation(s)
- Alaina M Forbes
- Department of Chemistry, Washington State University, Pullman, WA 99164-4630, USA
| | - Huimin Lin
- Department of Pharmaceutical Sciences, Washington State University, Pullman, WA 99164-4630, USA
| | - Gary G Meadows
- Department of Pharmaceutical Sciences, Washington State University, Pullman, WA 99164-4630, USA
| | - G Patrick Meier
- Department of Chemistry, Washington State University, Pullman, WA 99164-4630, USA
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Forbes AM, Meier GP, Haendiges S, Taylor LP. Structure-activity relationship studies of flavonol analogues on pollen germination. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2014; 62:2175-2181. [PMID: 24524670 DOI: 10.1021/jf405688d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Flavonoids are polyphenolic compounds required in the fertilization process in many, if not all, plants. However, the exact biological mechanism(s) and the interacting proteins are unknown. To determine the characteristics important in activating or inhibiting the pollination sequence, a structure-activity relationship analysis of natural and synthetic flavonols was conducted. Flavonol analogues were synthesized through a modified "one-pot" procedure that utilized a Baker-Venkataraman type rearrangement and a Suzuki-Miyaura cross-coupling of a halo-flavonol with an organotrifluoroborate. Of the flavonols tested, kaempferol was the only compound to act as a full agonist. The other smaller, less sterically hindered flavonols (galangin, kaempferide, and 4'-methyl flavonol) acted as partial agonists. Larger more hydrophobic flavonol analogues (3'- and 4'-benzoyl, 3'- and 4'-phenyl, and 3'- and 4'-iodo flavonols) had minimal or no agonist activity. Competition assays between kaempferol and these minimally activating flavonols showed that these analogues inhibited the action of kaempferol in a manner consistent with noncompetitive antagonism. The results suggest that steric hindrance is the most important factor in determining a good agonist. Hydrogen bonding also had a positive effect as long as the substituent did not cause any steric hindrance.
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Affiliation(s)
- Alaina M Forbes
- Department of Chemistry, Fulmer 305, Washington State University , Pullman, Washington 99164-4630, United States
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Putignani L, Massa O, Alisi A. Engineered Escherichia coli as new source of flavonoids and terpenoids. Food Res Int 2013. [DOI: 10.1016/j.foodres.2013.01.062] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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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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Fowler ZL, Koffas MAG. Biosynthesis and biotechnological production of flavanones: current state and perspectives. Appl Microbiol Biotechnol 2009; 83:799-808. [PMID: 19475406 DOI: 10.1007/s00253-009-2039-z] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2009] [Revised: 05/07/2009] [Accepted: 05/07/2009] [Indexed: 01/18/2023]
Abstract
Polyphenols produced in a wide variety of flowering and fruit-bearing plants have the potential to be valuable fine chemicals for the treatment of an assortment of human maladies. One of the major constituents within this chemical class are flavonoids, among which flavanones, as the precursor to all flavonoid structures, are the most prevalent. We review the current status of flavanone production technology using microorganisms, with focus on heterologous protein expression. Such processes appear as attractive production alternatives for commercial synthesis of these high-value chemicals as traditional chemical, and plant cell cultures have significant drawbacks. Other issues of importance, including fermentation configurations and economics, are also considered.
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Affiliation(s)
- Zachary L Fowler
- Department of Chemical and Biological Engineering, University at Buffalo, NY 14260, USA
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Qi GF, Yang ZY, Qin DD. Synthesis, Characterization and DNA-Binding Properties of the Cu(II) Complex with 7-Methoxychromone-3-carbaldehyde-benzoylhydrazone. Chem Pharm Bull (Tokyo) 2009; 57:69-73. [DOI: 10.1248/cpb.57.69] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Gao-Fei Qi
- College of Chemistry and Chemical Engineering and State Key Laboratory of Applied Organic Chemistry, Lanzhou University
| | - Zheng-Yin Yang
- College of Chemistry and Chemical Engineering and State Key Laboratory of Applied Organic Chemistry, Lanzhou University
| | - Dong-Dong Qin
- College of Chemistry and Chemical Engineering and State Key Laboratory of Applied Organic Chemistry, Lanzhou University
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Furuta T, Kan T, Ueda M, Hirooka Y, Tanaka K. Synthesis of Diazirine Possessing an Acetophenone Derivative as a Valuable Intermediate for a Flavonoid Photoaffinity Probe. HETEROCYCLES 2008. [DOI: 10.3987/com-07-s(n)4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Oyama KI, Kawaguchi S, Yoshida K, Kondo T. Synthesis of pelargonidin 3-O-6″-O-acetyl-β-d-glucopyranoside, an acylated anthocyanin, via the corresponding kaempferol glucoside. Tetrahedron Lett 2007. [DOI: 10.1016/j.tetlet.2007.06.134] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Stevenson PC, Aslam SN. The Chemistry of The Genus Cicer L. STUDIES IN NATURAL PRODUCTS CHEMISTRY 2006. [DOI: 10.1016/s1572-5995(06)80043-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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Lu Y, Irani NG, Grotewold E. Covalent attachment of the plant natural product naringenin to small glass and ceramic beads. BMC CHEMICAL BIOLOGY 2005; 5:3. [PMID: 16216122 PMCID: PMC1274306 DOI: 10.1186/1472-6769-5-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2005] [Accepted: 10/10/2005] [Indexed: 12/03/2022]
Abstract
Background Natural products have numerous medicinal applications and play important roles in the biology of the organisms that accumulate them. Few methods are currently available for identifying proteins that bind to small molecules, therefore the discovery of cellular targets for natural products with pharmacological activity continues to pose a significant challenge in drug validation. Similarly, the identification of enzymes that participate in the biosynthesis or modification of natural products remains a formidable bottleneck for metabolic engineering. Flavonoids are one large group of natural products with a diverse number of functions in plants and in human health. The coupling of flavonoids to small ceramic and glass beads provides a first step in the development of high-throughput, solid-support base approaches to screen complex libraries to identify proteins that bind natural products. Results The utilization of small glass and ceramic beads as solid supports for the coupling of small molecules was explored. Initial characterization of the beads indicated uniform and high capacity loading of amino groups. Once the beads were deemed adequate for the linking of small molecules by the coupling of NHS-fluorescein followed by microscopy, chemical hydrolysis and fluorometry, the flavonoid naringenin was modified with 1,4-dibromobutane, followed by the attachment of aminopropyltriethoxysilane. After NMR structural confirmation, the resulting 7-(4-(3-(triethoxysilyl)propylamino)butoxy) naringenin was attached to the ceramic beads. Conclusion Our results demonstrate that ceramic and glass beads provide convenient solid supports for the efficient and facile coupling of small molecules. We succeeded in generating naringenin-coupled ceramic and glass beads. We also developed a convenient series of steps that can be applied for the solid-support coupling of other related flavonoids. The availability of solid-support coupled naringenin opens up new opportunities for the identification of flavonoid-binding proteins.
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Affiliation(s)
- Yuhua Lu
- Department of Plant Cellular and Molecular Biology and Plant Biotechnology Center, The Ohio State University, Columbus, OH 43210, USA
| | - Niloufer G Irani
- Department of Plant Cellular and Molecular Biology and Plant Biotechnology Center, The Ohio State University, Columbus, OH 43210, USA
| | - Erich Grotewold
- Department of Plant Cellular and Molecular Biology and Plant Biotechnology Center, The Ohio State University, Columbus, OH 43210, USA
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Taylor LP, Grotewold E. Flavonoids as developmental regulators. CURRENT OPINION IN PLANT BIOLOGY 2005; 8:317-23. [PMID: 15860429 DOI: 10.1016/j.pbi.2005.03.005] [Citation(s) in RCA: 326] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
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Furuta T, Kimura T, Kondo S, Mihara H, Wakimoto T, Nukaya H, Tsuji K, Tanaka K. Concise total synthesis of flavone C-glycoside having potent anti-inflammatory activity. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.08.015] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Mallik AK, Chattopadhyay F, Dey DK, Patra A, Elmali A. Synthesis of (4 S*,5 S*)-Diphenyl-1,3,4,5-Tetrahydro-2 H-[1]Benzopyrano [4,3- d]Pyrimidine-2-Thiones by Base-Catalysed Cyclocondensation of ( E)-3-Benzylideneflavanones with Thiourea, and Determination of Their Monoacetylation Site. JOURNAL OF CHEMICAL RESEARCH 2004. [DOI: 10.3184/0308234041640681] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Base-catalysed cyclocondensation of ( E)-3-benzylideneflavanones with thiourea has been found to be highly stereoselective, producing (4 S*,5 S*)-diphenyl-1,3,4,5-tetrahydro-2 H-[1]benzopyrano[4,3- d]pyrimidine-2-thiones in high yield, the structure of one of which has been determined by X-ray crystallography. Just like 4,6-diaryl-3, 4-dihydropyrimidine-2(1 H)-thiones, the said products also undergo monoacetylation on treatment with Ac2O. The site of acetylation in both of these classes of compound are established by detailed NMR spectral studies.
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Affiliation(s)
- Asok K. Mallik
- Department of Chemistry, Jadavpur University, Kolkata – 700 032, India
| | | | - Dilip Kumar Dey
- Department of Chemistry, Jadavpur University, Kolkata – 700 032, India
- Present address: Department of Chemistry, Chandidas Mahavidyalaya, Khujutipara 731215, District-Birbhum, West Bengal, India
| | - Amarendra Patra
- Department of Chemistry, University College of Science, Calcutta University, Kolkata 700 009, India
| | - Ayhan Elmali
- Department of Engineering Physics, Faculty of Engineering, University of Ankara, 06100-Baselver, Ankara, Turkey
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Taylor LP, Miller KD. The use of a photoactivatable kaempferol analogue to probe the role of flavonol 3-O-galactosyltransferase in pollen germination. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2003; 505:41-50. [PMID: 12083465 DOI: 10.1007/978-1-4757-5235-9_4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Flavonol induced pollen germination in petunia is rapid, specific, and achieved at low concentrations of kaempferol or quercetin. To determine the macromolecules that interact with the flavonol signal we have synthesized affinity-tagged kaempferol analogues. The first generation molecules are based on a benzophenone photophore. We find that 2-(3-benzoylphenyl)-3,5,7-trihydroxychromen-4-one (BPKae) antagonizes flavonol-induced pollen germination in a concentration-dependent manner. Further, BPKae acts as an irreversible inhibitor of flavonol 3-O-galactosyltransferase (F3GalTase), the gametophyte-specific enzyme that controls the accumulation of glycosylated flavonols in pollen. The effects of BPKae are mediated by UV-A light treatment. The binding characteristics of BPKae to F3GalTase suggest that it can be used to identify the residues required for flavonol-binding and catalysis.
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Affiliation(s)
- Loverine P Taylor
- School of Molecular Biosciences, Washington State University, Pullman WA 99164-4234, USA.
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Hemisynthesis of all the O-monomethylated analogues of quercetin including the major metabolites, through selective protection of phenolic functions. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)01306-6] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Singh G, Singh L, Ishar M. 2-(N-Methylanilino)-3-formylchromone—a versatile synthon for incorporation of chromone moiety in a variety of heterocyclic systems and macrocycles through reactions with bifunctional nucleophiles. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)00908-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Thasana N, Ruchirawat S. The application of the Baker–Venkataraman rearrangement to the synthesis of benz[b]indeno[2,1-e]pyran-10,11-dione. Tetrahedron Lett 2002. [DOI: 10.1016/s0040-4039(02)00818-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Singh G, Singh R, Girdhar NK, Ishar M. A versatile route to 2-alkyl-/aryl-amino-3-formyl- and hetero-annelated-chromones, through a facile nucleophilic substitution at C2 in 2-(N-methylanilino)-3-formylchromones. Tetrahedron 2002. [DOI: 10.1016/s0040-4020(02)00128-x] [Citation(s) in RCA: 75] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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