藜芦的黄酮类化学成分研究

目的:对百合科藜芦属植物藜芦Veratrum nigrumL.的黄酮类化学成分进行分离和结构鉴定。方法:采用溶剂法、硅胶柱层析、Sephadex LH-20柱层析进行成分分离和纯化,通过理化性质和波谱技术鉴定化合物的结构。结果:从藜芦乙醇提取物中分离鉴定了9个黄酮类化合物,分别鉴定为3-甲氧基异鼠李素(3-methoxylisorhamnetin,1)、异鼠李素(isorham-netin,2)、3-甲氧基槲皮素(3-methoxylquercetin,3)、槲皮素(quercetin,4)、异槲皮苷(isoquercitrin,5)、3,5,7-三羟基-3′,5′-二甲氧基黄酮(3,5,7-trihydroxy-3′,5-′dimethoxylflavone,6)、5,7,4′-三羟基-3′-甲氧基黄酮(5,7,4-′trihydroxy-3-′methoxyl-fla-vone,7)、5,7,3′,4′-四羟基黄酮(5,7,3′,4-t′etrahydroxyflavone,8)、5,7,3′,5′-四羟基黄酮(5,7,3′,5-′tetrahydroxyflavone,9)。结论:化合物1~9均为首次从该植物中分离得到。     

浅裂鳞毛蕨中的一个新二氢黄酮

目的研究浅裂鳞毛蕨(Dryopteris sublaeta Ching et Hsu)的化学成分。方法利用硅胶柱色谱进行分离纯化，根据化合物的理化性质和光谱数据鉴定结构。结果从浅裂鳞毛蕨中分离并鉴定了4个化合物，分别为：2(S)-5,7,3′-三羟基-6,8-二甲基-5′-甲氧基-二氢黄酮(1)，荚果蕨素(5,7-二羟基-6,8-二甲基-4′-甲氧基-二氢黄酮，matteucinol)(2)，去甲氧基荚果蕨素(5,7-二羟基-6,8-二甲基-二氢黄酮，desmethoxymatteucinol)(3)和2′-羟基去甲氧基荚果蕨素(5,7,2′-三羟基-6,8-二甲基-二氢黄酮,2′-hydroxy-desmethoxymatteucinol)(4)。结论化合物1为新化合物，其余化合物均为首次从该属植物中分离得到。     

野菊花的化学成分研究

对野菊花的化学成分进行分析.首先,采用95%乙醇组织破碎提取得到野菊花总提取物,然后用石油醚、石油醚∶乙酸乙酯(80:20,v/v)、乙酸乙酯、乙酸乙酯:95%乙醇(80:20,v/v)梯度萃取,再利用硅胶、ODS、SephadexLH-20等色谱层析方法对石油醚:乙酸乙酯(80:20,v/v)部位进行了分离、纯化,得到3个化合物单体,并通过NMR、MS、IR、UV等手段鉴定其结构分别为:5,7,4′-二羟基-3′,5′-二甲氧基黄酮(1,小麦黄素);5,7,4′-三羟基黄酮(2,芹菜素);5,3′,4′-三羟基-6,7-二甲氧基黄酮(3).其中化合物3为首次从野菊花中分离得到.     

白花败酱草化学成分的分离与结构鉴定

目的研究白花败酱草的化学成分。方法利用溶剂萃取后进行硅胶柱和制备液相色谱分离纯化，根据理化性质和光谱数据鉴定结构。结果分离并鉴定了8个化合物：bolusanthol B (1)，(2S)-5,7,2′,6′-四羟基-6,8-二异戊烯基-二氢黄酮(2)，orotinin (3)，(2S)-5,7,2′,6′-四羟基-6-lavandulyl-二氢黄酮(4)，3′-异戊烯基-芹黄素(5)，木犀草素(6)，槲皮素(7)和洋芹素(8)。结论化合物2，4为新化合物，1，3，5为首次从败酱属植物中分离得到，6，7，8为首次从白花败酱草中分离得到。     

板栗种皮化学成分的分离与鉴定

目的研究板栗种皮的化学成分。方法采用硅胶柱色谱、凝胶柱色谱、氧化铝柱色谱和重结晶等多种分离方法对板栗种皮的体积分数为75%的乙醇提取物进行分离,通过化合物理化性质、谱学数据分析鉴定化合物结构。结果分离得到8个化合物,分别鉴定为软脂酸-1-甘油单酯(hexa-decanoic acid-2,3-dihydroxypropyl ester,1)、滨蒿内酯(scoparone,2)、异泽兰黄素(eupatilin,3)、5,7,4′-三羟基-6,3′-二甲氧基黄酮(jaceosidin,4)、5,7,4′-三羟基-6,3′,5′-三甲氧基黄酮(5,7,4′-trihy-droxy-6,3′,5′-methoxyflavone,5)、clovane-2,9-diol(6)、β-谷甾醇(β-sitosterol,7)、胡萝卜苷(dau-costerol,8)。结论化合物3~6为首次从栗属植物中分离得到。     

棉团铁线莲黄酮类成分研究

目的研究棉团铁线莲Clematis hexapetalaPall.的干燥根及根茎的化学成分。方法利用溶剂提取,硅胶柱色谱和高效液相色谱等手段进行分离、纯化,根据理化性质和波谱数据进行结构鉴定。结果分离鉴定了12个黄酮类化合物,分别为3,5,6,7,8,3′,4′-七甲氧基黄酮(1),nobiletin(2),liquiritigenin(3),橙皮素(4),柚皮素(5),7,4′-二羟基-二氢黄酮-7-O-β-D-葡萄糖苷(6),5,7,4′-三羟基-3′-甲氧基黄酮醇-7-O-α-L-鼠李糖(1→6)-β-D-葡萄糖苷(7),6-hydroxybiochainA(8),芒柄花素(9),大豆素(10),染料木素(11),鸢尾苷(12)。结论以上化合物均为首次从该植物中分离得到。     

粉枝莓中的两种新黄酮成分

为研究粉枝莓(Rubus biflorus Buch)的化学成分，经柱色谱分离，从粉枝莓中分离得到2个黄酮类化合物，光谱分析鉴定其结构为：8-甲基-6-异戊烯基-5,7-二羟基-5′-甲氧基-3′,4′-二氧亚甲基黄酮(A),和8-甲基-5′-异戊烯基-5-甲氧基-6,7-(2″,2″-二甲基吡喃)-3′,4′-二氧亚甲基黄酮(B)，分别命名为粉枝莓素A和粉枝莓素B。化合物A和B为新的黄酮类化合物。     

海南含羞草中黄酮碳苷类化学成分的研究

目的研究海南含羞草(Mimosa pudica)的化学成分。方法利用Diaion HP-20，Toyopearl HW-40，MCI-Gel CHP-20，Sephadex LH-20，RP18及硅胶等柱色谱法对海南含羞草成分进行分离纯化，根据理化性质和光谱数据鉴定化合物的结构。结果分离鉴定了4个化合物：7,8,3′,4′-四羟基-6-C-［α-L-鼠李糖-(1→2)］-β-D-葡糖黄酮碳苷(I)，5,7,4′-三羟基-8-C-［α-L-鼠李糖(1→2)］-β-D-葡糖黄酮碳苷(II)，5,7,3′,4′-四羟基-6-C-［α-L-鼠李糖-(1→2)］-β-D-葡糖黄酮碳苷(III)，儿茶素(IV)。结论化合物I为新化合物，化合物II～IV为首次从该植物中分离得到。     

乌奴龙胆的化学成分研究

目的研究龙胆科龙胆属植物乌奴龙胆Gentiana urnulaH.Smith全草的化学成分。方法运用硅胶、Sephadex LH-20凝胶和MCI色谱进行分离和纯化,通过现代波谱学方法,包括红外光谱、紫外光谱、旋光谱、质谱和核磁共振进行结构鉴定。结果 12个单体化合物从乌奴龙胆乙酸乙酯部位中分离获得,分别鉴定为:莨菪亭(1);3,5-二羟基-6,7,3′,4′-四甲氧基黄酮(2);1,5,8-三羟基-3-甲氧基■酮(3);1,5,7-三羟基-3-甲氧基■酮(4);1,3,7,8-四羟基■酮(5);1,7-二羟基-3,8-二甲氧基■酮(6);1,3,8-三羟基-7-甲氧基■酮(7);2-羰基坡曼酸(8);19α-羟基-3-乙酰基乌苏酸(9);槲皮素(10);科罗索酸(11)和苜蓿素(12)。结论除化合物3和5,其余化合物均为首次从该植物中分离获得。     

半枝莲的化学成分

目的对黄芩属植物半枝莲(Scutellaria barbataD.Don)的抗肿瘤活性部位(氯仿萃取物和正丁醇萃取物)的化学成分进行分离、鉴定。方法用体积分数为70%的乙醇加热回流提取干燥药材,经石油醚、氯仿、正丁醇分步萃取,利用反复硅胶柱色谱、聚酰胺柱色谱、Sephadex LH 20凝胶柱色谱进行分离、纯化,根据理化性质和核磁共振氢谱、碳谱数据对所得化合物进行结构鉴定。结果得到8个化合物,分别鉴定为对羟基苯甲醛(1)、3,4二羟基苯甲酸(2)、对羟基苯乙酮(3)、5,7,4′三羟基8甲氧基黄酮(4)、5,7,4′三羟基6甲氧基黄酮(5)、5,7,4′三羟基黄酮(6)、5,4′二羟基6,7,3′,5′四甲氧基黄酮(7)、5羟基4′甲氧基黄酮7OαL鼠李糖基(1→6)βD吡喃葡萄糖苷(8)。结论化合物7、8为半枝莲中首次分离得到。     

黄杉化学成分的研究

目的研究黄杉的化学成分。方法用色谱方法分离黄杉化学成分,用波谱技术(IR,UV,MS,1D和2D-NMR)鉴定结构。结果从黄杉树皮中分离得到6个化合物,分别鉴定为5,7,4′-trihydroxy-6-methylflavanone (poriol, I), 3,5,7,3′,4′-pentahydroxyflavonone (quercetin, II), 5,7,3′,5′-tetrahydroxy-6-methylflavanone (III), 5,7,3′,5′-tetrahydroxyflavanone (IV), 3,5,7,3′,5′-pentahydroxyflavanone (V)和5-hydroxy-6-methylchromone-7-O-β-D-glucopyranoside (VI)。结论III,VI为新化合物,所得6个化合物均为首次从该属植物中分得。     

Antifungal chalcones from Maclura tinctoria

Five prenylated flavonoids, including one new natural product, were isolated from an ethanol extract of the leaves of Maclura tinctoria (L.) Gaud. The new compound has been characterized as 2',4',4,2'-tetrahydroxy-3'-[3'-methylbut-3'-enyl]chalcone (1). The known compounds were identified as 2',4',4-trihydroxy-3'-[3'-methylbut-3'-enyl]chalcone (isobavachalcone) (2), 4,2'-dihydroxy-2'-[1-hydroxy-1-methylethyl]-2',3'-dihydrofurano[4',5':3',4']chalcone (bakuchalcone) (3), 4,4',5'-trihydroxy-6',6'-dimethyldihydropyrano[2',3':5',6']chalcone (bavachromanol) (4), and 5,7,3',4'-tetrahydroxy-6,8-diprenylisoflavone (6,8-diprenylorobol) (5). All the isolated compounds were evaluated against the AIDS-related opportunistic fungal pathogens, Candida albicans and Cryptococcus neoformans. Compound 2 was active against both yeasts.     

Flavonoids from the leaves of Pleioblastus argenteastriatus

A new flavonoid, 5,7,3'-trihydroxy-6-C-beta-D-digitoxopyranosyl-4'-O-beta-D-glucopyranosyl flavonoside (1), along with four known flavonoids 5,7,4'-trihydroxy-3',5'-dimethoxy flavone (2), 5,3',4'-trihydroxy-7-O-beta-D-glucopyranosyl flavonoside (3), 5,4'-dihydroxy-3',5'-dimethoxy-7-O-beta-D-glucopyranosyl flavonoside (4), 5,3',4'-trihydroxy-6-C-[beta-D-glucopyranosyl-(1 --> 6)]-beta-D-glucopyranosyl flavonoside (5) were isolated from 95% EtOH extract of the leaves of Pleioblastus argenteastriatus. Their structures were determined on the basis of spectroscopic techniques and chemical methods.     

显脉羊蹄甲的生物活性成分

目的对显脉羊蹄甲中具有抑制血小板聚集活性的有效部位的化学成分进行研究。方法从显脉羊蹄甲抑制血小板聚集活性部位中,利用溶剂分步萃取法和各种色谱手段(硅胶吸附柱色谱,聚酰胺柱色谱,Sephadex LH-20柱色谱,开放ODS柱色谱,液相色谱等)分离得到了10个化合物,根据其理化性质和光谱数据分析(1H-NMR、13C-NMR等)鉴定了它们的结构。结果从活性部位中分离鉴定的化合物为黄酮类,分别是:3,5,7,4'-四羟基-3'-甲氧基黄酮(3,5,7,4'-tetrahydroxy-3'-methoxyflavone,1)、5,7,3',4'-四羟基-3-甲氧基黄酮(5,7,3',4'-tetrahydroxy-3-methoxyflavone,2)、槲皮素(quercetin,3)、木樨草素(luteolin,4)、山柰酚(kaempferol,5)、5,7,4'-三羟基-3'-甲氧基黄酮(5,7,4'-trihydroxy-3'-methoxyflavone,6)、7,3',4'-三羟基-3-甲氧基黄酮(7,3',4'-trihydroxy-3-methoxyflavone,7)、杨梅苷(myricitrin,8)、槲皮素-3-O-α-L-吡喃阿拉伯糖苷(quercetin-3-O-α-Larabinopyranoside,9)、儿茶素(catechin,10)。结论化合物1-6、8-9均为首次从该植物中分离得到,化合物7为首次从羊蹄甲属植物中分离得到。     

Flavonoids from Artemisia gmelinii Web. ex Stechm.

Phytochemical investigation of Artemisia gmelinii Web. ex Stechm. led to the isolation of 11 known flavonoids. Their structures were identified as genkwanin (1), hispidulin (2), 3'-hydroxy-genkwanin (3), chrysoeriol (4), apigenin (5), 5,7,3',4'-tetrahydroxy-6,5'-dimethoxy-flavone (6), kumatakenin (7), quercetin (8), patuletin (9), quercetagetin-3,6,7-trimethylether (10) and 7,3',4'-trihydroxy-3-methoxy-flavone (11) by spectroscopic methods. Ten compounds (2-11)were isolated from this title plant for the first time, and five compounds (3, 6, 7, 10 and 11) were isolated from genus Artemisia for the first time.     

Three new C-flavonoids from Corallodiscus flabellata

Three new C-glycosylflavones, named 5,7,4'-trihydroxy-6-methoxy-8-C-[beta-D-xylopyranosyl- (1 --> 2)]-beta-D-glucopyranosyl flavonoside (1), 5,7,4'-trihydroxy-8-methoxy-6-C-[beta-D-xylopyranosyl-(1 --> 2)]-beta-D-glucopyranosyl flavonoside (2), and 5,3',4'-trihydroxy-7,8-dimethoxy-6-C-[beta-D-xylopyranosyl-(1 --> 2)]-beta-D-glucopyranosyl flavonoside (3), along with two known compounds 5,4'-dihydroxy-7-methoxy-6-C-glucopyranosyl-flavonoside (4), 3-methoxy-4-hydroxymethyl benzoate (5) were isolated from 70% acetone extract of Corallodiscus flabellata. Their structures were identified on the basis of spectroscopic techniques and chemical methods.     

火绒草黄酮类成分的分离与结构鉴定

目的对火绒草的化学成分进行研究,为进一步开发利用该植物资源提供依据。方法采用反复正相硅胶、反相ODS、Sephadex LH-20等柱色谱以及高效液相色谱法等手段进行分离纯化,并通过理化性质与光谱分析鉴定化合物的结构。结果从火绒草体积分数为70%的乙醇溶液提取物中分离鉴定了9个黄酮类化合物,分别为槲皮素-3-O-β-D-吡喃葡萄糖苷(quercetin-3'-O-β-D-gluco-pyranoside,1)、槲皮素-3'-O-β-D-葡萄糖苷(quercetin-3'-O-β-D-glucopyranoside,2)、5,7,3',4'-tetra-hydroxy-3-methoxyflavone(3)、5,7,3',4'-tetrahydroxy-3-methoxyflavonol-3'-O-β-D-glucopyranoside(4)、山柰酚(kaempferol5,)、山柰酚-3-O-β-D-吡喃葡萄糖苷(kaempferol-3-O-β-D-glucopyranoside6,)、3-甲基-山柰酚(3-methyl-kaempferol,7)、3-甲醚-山柰黄素-7-O-β-D-吡喃葡萄糖苷(3-methylether-kaempferol-7-O-β-D-glucoside,8)、木犀草素-3'-O-β-D-葡萄糖苷(luteolin-3'-O-β-D-glucoside9,)。结论化合物2-57、8、为首次从火绒草属植物中分离得到。     

Note Free Flavonoid Aglycones from Inula montana

Inula montana L. (Asteraceae) is sometimes used in folk medicine in France in place of Arnica montana L. (and improperly called “Arnica”). A preliminary study on the flavonoid chemistry of Inula montana showed the occurrence of four major flavonoid aglycones: luteolin (5,7,3',4'-hydroxyflavone), hispidulin (5,7,4'-hydroxy-6-methoxyflavone), nepetin (5,7,3'-hydroxy-6-methoxyflavone) and cirsimaritin (5,4'-hydroxy-6,7-dimethoxyflavone). This species contains less free flavonoid aglycones (only 5 compounds detected) than Arnica montana (nearly 20 free aglycones isolated and identified).     

A new chromone from Ficus lyrata

A new chromone, named 5,6-dihydroxy-2-methylchromone (FL-2), along with seven known flavonoids, 5-hydroxy-7,3,3',4'-tetramethoxyflavone (FL-3), 5,4'-dihydroxy-6,7,8-trimethoxyflavone (FL-4), 5,4'-dihydroxy-7,8-dimethoxyflavone (FL-5), 4-methoxychalcone (FL-6), 7,4'-dimethoxyapigenin (FL-7), 5,7,4'-trihydroxy-2',3',6'-trimethoxyisoflavone (FL-8 a rare flavonoid), acacetin-7-O-glucoside (FL-9) and acacetin-7-O-neohesperidoside (FL-10), and beta-sitosterol-D-glucoside (FL-1) have been isolated from the leaves of Ficus lyrata. Their structures have been established on the basis of chemical and spectral evidence (IR, UV, 1H NMR, 13C NMR and mass spectra).     

穿心莲根的化学成分研究

为研究常用中药爵床科植物穿心莲(Andrographis paniculata)根的化学成分,运用各种色谱方法从安徽临泉产穿心莲根的80%乙醇提取物中分离并鉴定了28个化合物,其中20个黄酮:5,5'-二羟基-7,8,2'-三甲氧基黄酮(1)、5-羟基-7,8,2',6'-四甲氧基黄酮(2)、5,3'-dihydroxy-7,8,4',-trimethoxyflavone(3)、2'-羟基-5,7,8-三甲氧基黄酮(4)、5-羟基-7,8,2',3',4'-五甲氧基黄酮(6)、wightin(7)、5,2',6'-trihydroxy-7-methoxyflavone 2'-O-β-D-glucopyranoside(8)、5,7,8,2'-四甲氧基黄酮(10)、5-羟基-7,8-二甲氧基二氢黄酮(11)、5-羟基-7,8-二甲氧基黄酮(12)、5,2'-二羟基-7,8-二甲氧基黄酮(13)、5-羟基-7,8,2',5'-四甲氧基黄酮(14)、5-羟基-7,8,2',3'-四甲氧基黄酮(15)、5-羟基-7,8,2'-三甲氧基黄酮(16)、5,4'-二羟基-7,8,2',3'-四甲氧基黄酮(17)、二氢黄芩新...