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Functional analysis of flavanone 3-hydroxylase(F3H)from Dendrobium officinale,which confers abiotic stress tolerance 被引量:2
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作者 Can Si Wei Dong +9 位作者 Jaime A.Teixeira da Silva Chunmei He Zhenming Yu Mingze Zhang Lei Huang Conghui Zhao Danqi Zeng Chuanmao Li Shengxiang Qiu Jun Duan 《Horticultural Plant Journal》 SCIE CAS CSCD 2023年第2期356-364,共9页
Flavonoids are important bioactive components in Dendrobium officinale,a medicinal orchid.They are involved in many biological activities,including protecting plants against biotic and abiotic stresses.Research on the... Flavonoids are important bioactive components in Dendrobium officinale,a medicinal orchid.They are involved in many biological activities,including protecting plants against biotic and abiotic stresses.Research on the key genes related to flavonoid biosynthesis in D.officinale is limited.In this study,one of the key flavonoid biosynthesis genes,flavanone 3-hydroxylase(F3H),was characterized from D.officinale.The open reading frame of DoF3H was 1134 bp long and it encoded a 377-amino acid protein.The DoF3H protein showed considerably high homology with F3H proteins from other plant species and shared a common evolutionary ancestor with other F3Hs.DoF3H transcripts were detected in different organs of adult plants and mainly accumulated in flowers,followed by roots,stems and leaves,a pattern that was similar to the content of flavonoids.Recombinant DoF3H protein,which was localized in the cytosol,could convert naringenin to dihydrokaempferol.The mRNA levels of DoF3H were significantly induced by salt and cold stresses.Furthermore,the heterologous expression of DoF3H in Escherichia coli conferred it higher tolerance to salt and cold stresses.These results provide insight into the molecular function of DoF3H in the biosynthesis of flavonoids,and provide a new application for improvement of abiotic tolerance in D.officinale. 展开更多
关键词 Dendrobium officinale flavanone 3-hydroxylase Dihydrokaempferol Salt stress Cold stress
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Flavanone and flavonoid hydroxylase genes regulate fiber color formation in naturally colored cotton
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作者 Hongli Zheng Bailin Duan +6 位作者 Bo Yuan Zhengbin Chen Dongliang Yu Liping Ke Wenlong Zhou Haifeng Liu Yuqiang Sun 《The Crop Journal》 SCIE CSCD 2023年第3期766-773,共8页
Using naturally colored cotton(NCC)can eliminate dyeing,printing and industrial processing,and reduce sewage discharge and energy consumption.Proanthocyanidins(PAs),the primary coloration components in brown fibers,ar... Using naturally colored cotton(NCC)can eliminate dyeing,printing and industrial processing,and reduce sewage discharge and energy consumption.Proanthocyanidins(PAs),the primary coloration components in brown fibers,are polyphenols formed by oligomers or polymers of flavan-3-ol units derived from anthocyanidins.Three essential structural genes for flavanone and flavonoid hydroxylation encoding flavanone-3-hydroxylase(F3H),flavonoid 3’-hydroxylase(F3’H)and flavonoid 3’5’-hydroxylase(F3’5’H)are initially committed in the flavonoid biosynthesis pathway to produce common precursors.The three genes were all expressed predominantly in developing fibers of NCCs,and their expression patterns varied temporally and spatially among NCC varieties.In GhF3Hi,GhF3’Hi and GhF3’5’Hi silenced lines of NCC varieties XC20 and ZX1,the expression level of the three genes decreased in developing cotton fiber,negatively correlated with anthocyanidin content and fiber color depth.Fiber color depth and type in RNAi lines changed with endogenous gene silencing efficiency and expression pattern,the three hydroxylase genes functioned in fiber color formation.GhF3H showed functional differentiation among NCC varieties and GhF3’H acted in the accumulation of anthocyanin in fiber.Compared with GhF3’H,GhF3’5’H was expressed more highly in brown fiber with a longer duration of expression and caused lighter color of fibers in GhF3’5’H silenced lines.These three genes regulating fiber color depth and type could be used to improve these traits by genetic manipulation. 展开更多
关键词 Naturally colored cotton Brown cotton fiber Fiber color Anthocyanidin flavanone/flavanoid hydroxylase
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Desmosflavanone Ⅱ: A New Flavanone from Desmos cochinchinensis Lour 被引量:1
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作者 吴久鸿 廖时萱 +3 位作者 毛士龙 梁华清 王彦来 苏中武 《Journal of Chinese Pharmaceutical Sciences》 CAS 1997年第3期7-9,共3页
A new flavanone was isolated from the roots of Desmos cochinchinensis Lour Its chemical structure was elucidated by spectral analysis as 7 hydroxy 5 methoxy 8 formyl 6 methylflavanone, named desmosflavanone Ⅱ
关键词 Amonaceae Desmos cochinchinensis Lour flavanone Desmosflavanone
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First total synthesis of (±)-abyssinoflavanone V 被引量:19
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作者 Jin Hui Yang Yan Min Zhao Cong Bin Ji 《Chinese Chemical Letters》 SCIE CAS CSCD 2008年第6期658-660,共3页
The total synthesis of (±)-abyssinoflavanone V was first achieved through C-prenylation, selective protection of phenolic hydroxyl group, aldol condensation, cyclization and deprotection starting from cheap 4-h... The total synthesis of (±)-abyssinoflavanone V was first achieved through C-prenylation, selective protection of phenolic hydroxyl group, aldol condensation, cyclization and deprotection starting from cheap 4-hydroxybenzaldehyde and 2,4,6- trihydroxyacetophenone, with total yield 24%. All structures of new compounds were confirmed by IR, 1^H NMR and MS. 展开更多
关键词 Abyssinoflavanone V flavanone Isoprenylflavanoids Total synthesis
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A New Flavanone and a New Flavanone Glycoside from Scutellaria baicalensis 被引量:3
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作者 Jun Gang YIN 《Chinese Chemical Letters》 SCIE CAS CSCD 2006年第11期1457-1459,共3页
A new flavanone (2S)-5, 7, 2', 5'-tetrahydroxy-flavanone 1 together with a new flavanone glycoside (2S)-5, 7, 2', 5'-tetrahydroxy-flavanone 7-O-13-D-glucopyranoside 2, were isolated from the dry roots of Scute... A new flavanone (2S)-5, 7, 2', 5'-tetrahydroxy-flavanone 1 together with a new flavanone glycoside (2S)-5, 7, 2', 5'-tetrahydroxy-flavanone 7-O-13-D-glucopyranoside 2, were isolated from the dry roots of Scutellaria baicalensis. Their structures were elucidated on the basis of spectroscopic data. 展开更多
关键词 Scutellaria baicalensis LABIATAE flavanone flavanone glycoside.
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Protective Actions of Blumea Flavanones on Primary Cultured Hepatocytes and Liver Subcellular Organelle against Lipid Peroxidation
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作者 赵金华 许实波 +2 位作者 王正濂 林永成 陈荣礼 《Journal of Chinese Pharmaceutical Sciences》 CAS 1998年第3期40-44,共5页
To search for the protective actions of blumea flavanones (BFs) on hepatocytes and hepatic subcellular organelle against lipid peroxidation, monkey′s hepatocytes were isolated and cultured with or without blumea flav... To search for the protective actions of blumea flavanones (BFs) on hepatocytes and hepatic subcellular organelle against lipid peroxidation, monkey′s hepatocytes were isolated and cultured with or without blumea flavanones, then damaged by FeSO 4 cysteine or CCl 4. The lipid peroxidation (malondialdehyde production) and alteration in hepatocyte membrane (leakage of GPT) were estimated. Hepatic subcellular organelles were also isolated and incubated with or without blumea flavanones, then injured by FeSO 4 ascorbate. The generation of malondialdehyde(MDA) was measured. It was found that BFs 10 and 100 μmol·L 1 inhibited the MDA generation and GPT (glutamic pyruvic transaminase) leakage out of hepatocytes that were induced by CCl 4 or FeSO 4 cysteine. BFs could prevent lipid peroxidation initiated by FeSO 4 ascorbate in subcellular organelle suspension. Among BFs, BF 2 possessed the strongest activity. Conclusion: Blumea flavanones possess antioxidation activities that protect monkey′s hepatocytes and hepatic subcellular organelle against injuries induced by FeSO4 or CCl 4. 展开更多
关键词 Blumea flavanones Antioxidants Macaca mulatta HEPATOCYTE Subcellular organelle
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Two New Antibacterial Flavanones from Sophora flavescens 被引量:5
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作者 Mei Ai CAO Xiao Bai SUN Pei Hua ZHAO Cheng Shan YUAN 《Chinese Chemical Letters》 SCIE CAS CSCD 2006年第8期1048-1050,共3页
Two new lavandulylated flavanones,(2R, 3R)-8-1avandulyl-2'-methoxy-5, 7, 4'-trihydroxyflavanonol (1) and 8-1avandulyl-5,7, 4'-trihydroxyflavonol (2),were isolated from the dry roots of S opharaflavescens.Thei... Two new lavandulylated flavanones,(2R, 3R)-8-1avandulyl-2'-methoxy-5, 7, 4'-trihydroxyflavanonol (1) and 8-1avandulyl-5,7, 4'-trihydroxyflavonol (2),were isolated from the dry roots of S opharaflavescens.Their structures were eiucidated on the basis of spectroscopic data. Compounds 1 and 2 exhibited significant antibacterial activities. 展开更多
关键词 Sophora flavescens FABACEAE flavanone antibacterial activity.
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Solvent-free Synthesis of Flavanone over New Hybrid Mesoporous Base Catalysts 被引量:2
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作者 WANG Hui NIU Xiao-di +3 位作者 ZHAO Min XIAO Xue-bin WANG Hong-su WANG Zhong-dong 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2011年第4期664-668,共5页
Benzyl and anthracenemethyl groups were respectively bonded to the N atoms of 3-aminopropyl functionalized mesoporous SBA-15(APS-SBA-15) to obtain two new base catalysts over which the condensation reaction of benza... Benzyl and anthracenemethyl groups were respectively bonded to the N atoms of 3-aminopropyl functionalized mesoporous SBA-15(APS-SBA-15) to obtain two new base catalysts over which the condensation reaction of benzaldehyde and 2'-hydroxyacetophenone was studied.Good catalytic activities and high selectivities for flavanones were obtained in solvent-free reactions,which is attributed to the effect of benzyl and anthracenemetyl groups on the base sites of catalysts and the steric hindrance of futher reaction of flavanone with benzaldehyde. 展开更多
关键词 APS-SBA-15 flavanone Bz-APS-SBA-15 An-APS-SBA-15
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Influence of Mobile Phase Composition on the Enantioseparation of Methoxyl Flavanones with Self-prepared CDMPC Column and Chiral Recognition Mechanism 被引量:1
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作者 Bao Hai SHAO Xiu Zhu XU +2 位作者 Jian De LU Li ZOU Xiao Yun FU 《Chinese Chemical Letters》 SCIE CAS CSCD 2003年第4期401-403,共3页
The influence of different alcohol modifiers in mobile phase on the chiral separation of 4-methoxyl flavanone, 5-methoxyl flavanone and 6-methoxyl flavanone on cellulose tris (3, 5-dimethylphenylcarbamate) (CDMPC) col... The influence of different alcohol modifiers in mobile phase on the chiral separation of 4-methoxyl flavanone, 5-methoxyl flavanone and 6-methoxyl flavanone on cellulose tris (3, 5-dimethylphenylcarbamate) (CDMPC) column was studied and the chiral recognition mechanism was discussed. Using hexane-tert-butanol (1.31 mol L-1) as the mobile phase, those three methoxyl flavanones were excellently separated on CDMPC chiral column. 展开更多
关键词 Cellulose tris (3 5-dimethylphenylcarbamate) methoxyl flavanone chiral stationary phase enantioseparation.
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Synthesis of New Flavanone Derivatives of Farrerol and Preliminary SAR Studies on Anti-VSMCs Vegetation Activity 被引量:1
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作者 SHI Lei FENG Xiu-e +3 位作者 LIN Wen-han FANG Lian-hua DU Guan-hua LI Qing-shan 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2011年第2期237-240,共4页
A series of new flavanone derivatives of farrerol was designed and synthesized as a potent inhibitor of vascular smooth muscle cells(VSMCs) vegetation according to a convenient method. The structures of all the synt... A series of new flavanone derivatives of farrerol was designed and synthesized as a potent inhibitor of vascular smooth muscle cells(VSMCs) vegetation according to a convenient method. The structures of all the synthesized compounds were confirmed by 1H NMR, 13C NMR and EIHR-MS. The biological activities of these compounds against VSMCs in vitro were evaluated. The assay results indicate that two compounds, 5,7-dihydroxy-6,8-dimethyl- 2-(2-nitrophenyl)chroman-4-one(7f) and 2,3-dibromo-4,5-dihydroxydiphenylmethanone(7j) exhibited high activity against VSMCs in vitro with IC50 values of 9.9 and 6.7 μmol/L, respectively, and the preliminary structure-activity relationship(SAR) was described. 展开更多
关键词 Synthesis flavanone derivative Anti-VSMCs vegetation
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Two new flavanone glycosides from Macrothelypteris torresiana (Gaud.) Ching 被引量:1
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作者 Wei Fu Wei Fang Jin Lan Ruan 《Chinese Chemical Letters》 SCIE CAS CSCD 2009年第5期579-581,共3页
Two new flavanone glycosides 1 and 2 were isolated from the aerial parts of Macrothelypteris torresiana (Gaud.) Ching. The structures of two products were identified as (2S)-5,7,2',5'-tetrahydroxyflavanone-2'-O... Two new flavanone glycosides 1 and 2 were isolated from the aerial parts of Macrothelypteris torresiana (Gaud.) Ching. The structures of two products were identified as (2S)-5,7,2',5'-tetrahydroxyflavanone-2'-O-β-D-6"-O-acetylglucopyranoside and (2S)- 5,7,2',5'-tetrahydroxyflavanone-2'-O-β-D-glucopyranoside on the basis of their chemical and spectral analysis, respectively. 展开更多
关键词 Macrothelypteris torresiana (Gaud.) Ching flavanone glycosides Spectral analysis
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Therapeutic Applications of Naringenin, a Flavanone Enriched in Citrus Fruits, for Disorders beyond Diabetes
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作者 Jaswinder Kaur Manish Vyas +2 位作者 Joginder Singh Ram Prasad Jeena Gupta 《Phyton-International Journal of Experimental Botany》 SCIE 2020年第4期795-803,共9页
In recent years,there has been an increase in epidemiological studies to highlight the health benefits of plant secondary metabolites.Flavonoids(polyphenolic plant secondary metabolites)are recently emerging as an imp... In recent years,there has been an increase in epidemiological studies to highlight the health benefits of plant secondary metabolites.Flavonoids(polyphenolic plant secondary metabolites)are recently emerging as an important source for the discovery of new drugs increasing their pharmaceuticals,nutraceutical and medicinal applications.Naringenin is a flavanone,enriched in citrus fruits,tomatoes,bergamot,etc.which has been evaluated extensively for managing diabetes.However,in addition to this,naringenin had been ascribed to various important biological activities like antioxidant,antiviral,anticancer,anti-inflammatory,antiestrogenic,etc.This article aims at highlighting the therapeutic value of naringenin in managing disorders other than diabetes and its role in regulating gene expression by altering chromatin structure as histone deacetylase inhibitor.The understanding of these phenomena will increase the overall knowledge of the various health-promoting effects of citrus fruits. 展开更多
关键词 NARINGENIN flavanone ANTI-VIRAL HEPATOPROTECTIVE ANTI-CANCER anti-estrogenic
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A New Flavanone from the Bark of Morus macoura Miq.
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作者 Sheng Guo SUN Ruo Yun CHEN De Quan YU 《Chinese Chemical Letters》 SCIE CAS CSCD 2001年第3期231-232,共2页
A new flavanone named macrouroine C (1) was isolated from the bark of Morus macroura Miq.. The structure of 1 was elucidated mainly on the basis of spectroscopic evidence.
关键词 Morus macroura Miq. flavanone macrourone C.
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Crystal Structure of 2-[(N-methyl-N-phenyl ) aminomethyl] flavanone
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作者 CHEN Chuan-Feng XU Jian-Hua +2 位作者 ZHU Ying LIU You-Cheng (Institute of Chemistry, The Chinese Academy of Sciences, Beijing 100080)(Department of Chemistry, Nanjing Universiry, Nanjing 210093)(State Key Laboratory of Applicd Organic Chemistry, Lanzhou Univers 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 1997年第5期388-391,共4页
The title compound 1 (C23H21NO2) was obtained by photoinduced reaction of flavone and N, N- dimethylaniline. The crystal structure of 1 has been determined by X-ray analysis. The crystal belongs to orthorhombic system... The title compound 1 (C23H21NO2) was obtained by photoinduced reaction of flavone and N, N- dimethylaniline. The crystal structure of 1 has been determined by X-ray analysis. The crystal belongs to orthorhombic system, space group isPbca with a= 11. 799(2), b=11. 979(1), c=25. 972(3), V=3670. 9(5) , Z=8, Mr= 343. 4, Dc = 1.26 g/cm3, μ= 5. 98 cm-1, F(000) = 876 and the final R=0.073 and Rw =0.070 for 2235 observed diffractions. Structure analysis reveals thatthe pyran ring is distorted into a C(1)-sofa con formation. 展开更多
关键词 photoinduced reaction FLAVONE flavanone crystal structure biologicaland physiological activities
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New flavanone-monoterpene hybrids as α-glucosidase inhibitors from the root bark of Morus alba
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作者 Lin-Lin Tian Hua Zhang 《TMR Modern Herbal Medicine》 CAS 2022年第4期37-41,共5页
Objective The Morus alba root bark is a well-known Chinese herbal medicine called Sang-Bai-Pi and has often been used to relieve the hyperglycemic symptom of diabetes patients.The current work aims to further explore ... Objective The Morus alba root bark is a well-known Chinese herbal medicine called Sang-Bai-Pi and has often been used to relieve the hyperglycemic symptom of diabetes patients.The current work aims to further explore its bioactive constituents with α-glucosidase inhibitory activity for the potential treatment of diabetes.Methods A combination of different separating techniques including routine column chromatograph and HPLC especially on chiral columns were applied for the isolation of target molecules,while comprehensive spectroscopic experiments comprising MS,NMR,ECD,etc.were carried out to complete the structural assignment.The anti-hyperglycemic property of the isolates was evaluated by an in vitro α-glucosidase inhibitory bioassay.Results Two pairs of new flavanone-monoterpene hybrid enantiomers were isolated and identified,and an interesting phenomenon of mutual transformation between these cometabolites were detected,which resulted in their regio-isomerization and enantiomerization.The bioassay results revealed remarkable α-glucosidase inhibitory activity for these fascinating molecules.Conclusions The Morus alba root bark is a rich source of bioactive flavonoid derivatives and deserves further investigations to develop new potential chemotherapies for diabetes control and treatment. 展开更多
关键词 Morus alba flavanone Regio-isomerization ENANTIOMERIZATION α-Glucosidase inhibition
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An overview of flavonoids from Sophora flavescens(kushen)with some emphasis on the anticancer properties of kurarinone and sophoraflavanone G
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作者 Eric Wei Chiang Chan Ying Ki Ng +1 位作者 Hung Tuck Chan Siu Kuin Wong 《Journal of Chinese Pharmaceutical Sciences》 CAS CSCD 2023年第8期603-615,共13页
In this overview,the current knowledge of the constituents of flavonoids isolated from the roots of Sophora flavescens(kushen)is updated.Flavonoids consist of several classes,such as flavanones,flavonols,chalcones,iso... In this overview,the current knowledge of the constituents of flavonoids isolated from the roots of Sophora flavescens(kushen)is updated.Flavonoids consist of several classes,such as flavanones,flavonols,chalcones,isoflavones,biflavonoids,flavanols,and flavones.The most common compounds are kurarinone(KRN),sophoraflavanone G(SFG),2′-methoxykurarinone,kuraridine,isoxanthohumol,and formononetin.KRN and SFG are two major flavanones with more vital anticancer properties than other flavonoids.From the literature,the cytotoxic values of KRN and SFG are variable and depend on the type of cancer cells tested.The anticancer activities of these two flavonoids involve different molecular mechanisms.Clinical trials are needed before anticancer drugs from KRN and SFG can be developed. 展开更多
关键词 Kushen flavanoneS CYTOTOXICITY Molecular mechanisms
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Synthesis of Novel Flavanone Derivatives and Their Anti Staphylococcus aureus Evaluation 被引量:1
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作者 XU Qing-hui LI Jl-zhen +2 位作者 HE Jiang-hua ZHAO Xin HUO Qi-sheng 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2013年第4期695-698,共4页
The authors synthesized two novel flavanones bearing iso-pentenyl side chain and evaluated their anti Staphylococcus aureus(S.aureus) activity.The target compounds 7a[2-5'-(l",2"-dimethylallyl)-2'-methoxy-4',... The authors synthesized two novel flavanones bearing iso-pentenyl side chain and evaluated their anti Staphylococcus aureus(S.aureus) activity.The target compounds 7a[2-5'-(l",2"-dimethylallyl)-2'-methoxy-4',5,7-tetrahydroxyflavanone] and 7b[2-5'-(l",2"-dimethylallyl)-3'-methoxy-4',5,7-tetrahydroxyflavanone] were synthesized respectively through total four steps starting from 2,4,6-trihydroxy acetophenone(3) and the corresponding iso-pentenyl substituted benzaldehyde(1),in which the 1,2-dimethyl-2-propenyl group had been introduced previously via abnormal Claisen rearrangement.The bioactivities of the two flavanones against S.aureus strains ATCC 25923,29213,and MRSA 252 were evaluated,showing the same minimum inhibitory concentration(MIC) value of 16 μg/mL. 展开更多
关键词 flavanone Abnormal Claisen rearrangement ANTIMICROBIAL iso-Pentenyl side chain
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Chemical modification of acetaminophen:PASS assisted in vivo antiinflammatory activity of chalcones,flavanones and Schiff bases
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作者 Syed Misbahul Hasan Shah Alam Khan +3 位作者 Kavita Golani Jaswinder Lamba Aftab Ahmad Asif Husain 《Journal of Chinese Pharmaceutical Sciences》 CAS CSCD 2017年第8期611-620,共10页
In the present study,synthetic chalcones,flavanones and Schiff bases were prepared starting from paraceamol,and evaluated their anticipated anti-inflammatory activity.Chalcones were synthesized by reacting 3-acetyl-4-... In the present study,synthetic chalcones,flavanones and Schiff bases were prepared starting from paraceamol,and evaluated their anticipated anti-inflammatory activity.Chalcones were synthesized by reacting 3-acetyl-4-hydroxy acetanilide and aromatic aldehydes in alcoholic potassium hydroxide(KOH) solution under Claisen-Schmidt condensation conditions.The chalcones were cyclized in the presence of piperidine in isoamyl alcohol to obtain flavonone derivatives.Schiff bases were synthesized by condensing 3-acetyl-4-hydroxy anilines with aromatic aldehydes in the presence of HCl.These Schiff bases were further reacted with other aromatic aldehydes in alcoholic KOH solution.PASS cheminformatics software was used to predict the anti-inflammatory activity of synthesized compounds.PASS software predicted that chalcone-based Schiff bases 6a–d contained structural features that can exhibit anti-inflammatory activity.All the prepared derivatives of acetaminophen exhibited moderate to excellent in vivo anti-inflammatory activity in carrageenan-induced edema in rat paw.All the Schiff bases coupled chalcones showed good anti-inflammatory activity compared with the reference drug,diclofenac.Further evaluation of their therapeutic potential and safety profile is required in the future study. 展开更多
关键词 p-Acetaminophen ANTI-INFLAMMATORY CHALCONE flavanone
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New flavonoids from bioactive extract of Algerian medicinal plant Launeae arborescens
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作者 Khaled Sekkoum Nasser Belboukhari Abdelkrim Cheriti 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2014年第4期267-271,共5页
Objective:To investigate the butanol fraction of the water/acetone extract and isolate of the new flavonoids from Launeae arboescens.Methods:The compounds were isolated by liquid chromatographic methods and their stru... Objective:To investigate the butanol fraction of the water/acetone extract and isolate of the new flavonoids from Launeae arboescens.Methods:The compounds were isolated by liquid chromatographic methods and their structures were identified by using spectroscopic analysis.Results:The isolated compounds were identified as:7-0-[α-rhamnopyranosyl 4',5,6-Trihydroxy flavone 1,4',5'-Di-Methoxy 7-(5"-Me Hexan)1-oyl flavanone 2,3"-isopropyl pyrano[1":7,4":6]3',4',5',5-Tetrahydroxy flavanone 3,5,4',5'-Tri-Hydroxy 7-(3"-Me butan)-yl flavanone 4.5,7-Dihydroxy-2',4',5'-trimethoxy-isoflavanone 5,5,6,7,4'-tetrahydroxy flavonol 6,7-O-[α-rhamnopyranosyl-(1->6)-β-glucopyranosyl]-4',5,7-tri-hydroxy-flavanone 7,7-O-[α-rhamnopyranosyl-(1->6)-β-glucopyranosyl]3',5-Dihydroxy 4'-Methoxy flavanone 8.Conclusions:The presence of different types of bioactive flavonoids in Launeae arhoescens extract can explain the large ethnopharmacological uses and the potential activity of this medicinal plant. 展开更多
关键词 Launeae arborescens Asteraceae flavanone Isoflavanone Glycosid flavanone
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First total synthesis of (±)-puyanin and (±)-4'-O-methylbonannione 被引量:3
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作者 Jin Hui Yang Yu Heng Zhang Hong Jun Li Shi Zhi Jiang Yun Feng Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2010年第11期1267-1269,共3页
A facile approach for the first total synthesis of two naturally occurring geranylated flavonoids,(±)-puyanin 1 and(±)-4'-O- methylbonannione 2 has been obtained with total yield 27%and 21%,respectively... A facile approach for the first total synthesis of two naturally occurring geranylated flavonoids,(±)-puyanin 1 and(±)-4'-O- methylbonannione 2 has been obtained with total yield 27%and 21%,respectively.The key steps were regioselective cyclization of geranylated trihydroxychalcone and regioselective geranylation of 2,4,6-trihydroxyacetophenone. 展开更多
关键词 Puyanin 4'-O-Methylbonannione flavanone Geranylated flavonoids Total synthesis
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