滇产干花豆中的两个新黄酮

目的研究滇产干花豆(Fordia cauliflora Hemsl)茎的化学成分。方法采用反复硅胶柱色谱进行分离纯化,根据光谱数据和理化性质进行结构鉴定。结果从干花豆乙醇提取物中分离得到6个化合物,分别鉴定为6-羟基-3-甲氧基-6″,6″-二甲基吡喃(2″,3″∶7,8)黄酮(1),3-甲氧基-6-(3-甲基-2-丁烯氧基)-6″,6″-二甲基吡喃(2″,3″∶7,8)黄酮(2),3,6-二甲氧基-6″,6″-二甲基吡喃(2″,3″∶7,8)黄酮(3),7-羟基-4′-甲氧基异黄酮(4),7,4′-二羟基异黄酮(5)和水黄皮素(6)。结论化合物1和2为新化合物,化合物3～5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。     

白水茶中二种新黄酮甙的结构

从广西野生的白水茶(Camellia sinensis L.)中分得三种黄酮类成分:Ⅰ,Ⅱ和Ⅲ。经理化常数测定、光谱分析和化学反应鉴定:Ⅰ为已知成分芹菜素(apigenin),Ⅱ为芹菜素-5-O-α-L-吡喃鼠李糖基(1→4)-6″-O-乙酰基β-D-吡喃葡萄糖甙,Ⅲ为芹菜素-5-O-α-L-吡嘀鼠李糖基(1→4)-β-D-吡喃葡萄糖甙。Ⅱ和Ⅲ为首次报道的新黄酮甙,暂分别命名为山茶甙A(camellianin A)和山茶甙B(camcllianin B)。     

芫花根醇提物中三个新的双黄酮类化合物

目的研究芫花根次生代谢产物的化学组成。方法芫花根以95％乙醇于60-70 ℃提取7 d。提取物以硅胶、Sephadex LH-20及HPLC等方法加以分离。分离产物以1D和2D NMR,MS,UV,IR及CD鉴定其结构。结果 从芫花根醇提物中分离出3个双黄酮,其结构被鉴定为毛瑞香素H-3-甲醚（1）、毛瑞香素H-3″-甲醚（2）和毛瑞香素G-3″-甲醚（3）。结论化合物1,2和3为新的双黄酮类化合物。     

瑞香狼毒化学成分的研究

从瑞香狼毒（Stellera chamaejasme L.)的根中得到12个化合物，经理化鉴别和光谱分析推定晶（8）为7－甲氧基西瑞香素（7－methoxydaphnoretin)是新化合物，命名为异西瑞香素（isodaphnoretin)，晶（7）为西瑞香素（daphnoretin)，晶（2）为伞形花内酯（umbelliferone)，晶（5）为胡萝卜甙，晶（3）为β－谷甾醇，晶2，5和8是首次从该植物中分得。     

板栗花中两个新黄酮苷类化合物板栗花中两个新黄酮苷类化合物

目的研究板栗花的活性成分。方法应用硅胶柱色谱和薄层色谱进行分离,应用波谱学方法进行结构鉴定。结果分离得到两个黄酮苷类化合物,分别鉴定为山萘酚-3-O-(6″-反式-对-香豆酰基)-α-D-甘露吡喃糖苷(1)和山萘酚-3-O-(6″,4″-双-反式-对-香豆酰基)-α-D-甘露吡喃糖苷(2)。结论化合物1,2均为新化合物,命名为栗苷A和栗苷B。     

瑞香狼毒化学成分的研究

从瑞香狼毒 (StellerachamaejasmeL .)中分离得到 3个化合物 ,根据理化数据和NMR数据分别鉴定为S (+) 3 羟基 1,5 二苯基 1 戊酮 (1) ,西瑞香素 (2 )和 (- ) 7 甲氧基狼毒素 (3) .其中化合物 1为新化合物 ,化合物 3为首次分得的旋光纯的 7 甲氧基狼毒素     

黄甘草异黄酮成分的研究

从黄甘草(Glycyrrhiza eurycarpa P.C.Li)根及根茎中分得五个异黄酮化合物,根据理化性质及光谱(UV,MS,¹HNMR,¹³CNMR,NOE,HMBC)数据分析,化合物I的结构推定为7,2′,4′-三羟基-3′-异戊烯基异黄酮,为一新化合物,命名为黄甘草异黄酮A(eurycarpinA)。化合物I的结构推定为7,2′-二羟基-(2″,3″∶4′,3′)-6″,6″-二甲基吡喃异黄酮,为一新的天然产物,命名为黄甘草异黄酮B(eurycarpinB)。其余化合物分别鉴定为 licoisoflavone A(III),毛蕊异黄酮(calycosin,IV)和芒柄花素(formononetin,V)。化合物II～V均为首次从本植物中得到。     

狼毒的有效成分及其药理活性研究进展

狼毒是毒属植物瑞香科瑞香狼毒 (Stellera chamaejasmeL.)或大戟科狼毒大戟 (Euphorbia fischeriana Stued.)、月腺大戟 (Euphorbia ebracteolata Hayata.)的根 ,有逐水祛痰、散结杀虫之功效 ,为常用中药。近年的研究发现 ,狼毒提取物对肿瘤细胞有较强的抑制活性 ,此外还有抗菌和抗病毒作用 ,是一个理想的天然药物开发品种。1 　 化学成分研究1 .1　瑞香狼毒　六十年代初 ,我国的研究者从瑞香狼毒的根中分离出一种酸性物质 ,定为狼毒素 (chamaejamine) ,后来确定了其双氢双黄酮的结构。目前瑞香狼毒中已知的成分主要有倍半萜内酯、二萜生…     

假鹰爪根化学成分的研究

假鹰爪(Desmos cochinensis Lour.)根的石油醚提取物中分得三个黄酮类化合物。其中化合物Ⅰ和Ⅱ分别鉴定为5,7-二羟基-6-甲酰基-8-甲基双氢黄酮(lawinal)和5,7-二羟基-6-甲酰基-8-甲基黄酮(isounonal)。Ⅲ为一含醛基的新化合物。根据光谱分析(紫外、红外、质谱、氢谱、碳谱、二维核磁共振异核位移相关谱及X-单晶衍射)证明其结构为4,7-二羟基-5-甲氧基-6-甲基-8-甲酰基黄烷。化合物Ⅰ和Ⅱ均属首次从该植物中分得。     

Lignanoids from Solanum lyratum

In the present study, we aimed to investigate the chemical constituents from Solanum lyratum.The constituents were separated by column chromatography on silica gel, Sephadex LH-20 and preparative HPLC. Their structures were elucidated by spectroscopic means. A total of 13 compounds were isolated fromS. lyratumand identified as syringin (1), (+)-isolariciresinol (2), (+)-syringaresinol (3), leptolepisol D (4),(–)-secoisolariciresinol (5), (–)-epi-syringaresinol (6),aviculin(7), zhebeiresinol(8), ciwujiatone(9),(–)-(7′S,8S,8′R)-4,4′-dihydroxy-3,3′,5,5′-tetramethoxy-7′,9-epoxylignan-9′-ol-7-one(10),(+)-lariciresinol(11), (+)-pinoresinol (12) and (+)-medioresinol (13). All the compounds were isolated from S. lyratumfor the first time.     

荷叶中化学成分的分离与鉴定

目的研究荷叶中的化学成分。方法采用正相硅胶、反相ODS、Sephadex LH-20等柱色谱及PHPLC法进行分离纯化,并通过理化性质、光谱分析方法及与文献对比,鉴定化合物的化学结构。结果从荷叶体积分数为70%的乙醇提取物中分离鉴定了8个化合物,其中有4个木脂素类:(+)-松脂醇[(+)-pinoresinol,1]、(+)-表松脂醇[(+)-epipinoresinol,2]、sylvatesmin(3)、(+)-异落叶松树脂醇[(+)-isolariciresinol,4];4个降倍半萜类:(3S,5R,6S,7E)-5,6-epoxy-3-hydroxy-7-me-gastigmen-9-one(5)、4,5-dihydroblumenol A(6)、(E)-3-oxo-retro-α-ionol(7)、(3S,5R,6R,7E,9S)-megastigman-7-ene-3,5,6,9-tetraol(8)。结论化合物1-8均为首次从莲属植物中分离得到。     

Synthesis and anti-HIV activity of various 2'- and 3'-substituted 2',3'-dideoxyadenosines: a structure-activity analysis

A systematic synthesis was undertaken of 2',3'-dideoxyadenosine analogues with either an azido, fluorine, or hydroxyl group substituted in the "up" or "down" position of C-2 or C-3 of the sugar moiety. The compounds were evaluated against the cytopathogenicity of human immunodeficiency virus (HIV) for MT-4 cells. The four azido derivatives 6, 7, 8, and 9 were synthesized by a nucleophilic displacement reaction with lithium azide on the mesylates 3, 2, 5, and 4. (Diethylamido)sulfur trifluoride was used for the synthesis of 10-12. The compound 13 was obtained by 2'-deoxygenation of 9-(3-fluoro-3-deoxy-beta-D-xylofuranosyl)adenine. Among the azido derivatives, compound 8 with the 3'-azido "down" was slightly more active than 2',3'-dideoxyadenosine (1) but considerably more toxic, and, of the fluorine series, compound 11, with the 2'-fluoro "up", was the most selective inhibitor of HIV, although it was less active than 1. Hence, none of the newly synthesized compounds proved more selective in their anti-HIV activity than the parent compound, 1.     

Lignans of<Emphasis Type="Italic">Rosa multiflora</Emphasis> roots

Five known lignans, (+)-pinoresinol (1), (+)-8-hydroxypinoresinol (2), (-)-dehydrodiconiferyl alcohol (3), (+)-trans-dehydrodiconiferyl alcohol (4), and (-)-olivil (5), were isolated from the roots of Rosa multiflora for the first time. Their structures were determined using spectroscopic data.     

Chemical constituents from Qianliang tea

Ten compounds were isolated from Qianliang tea, a kind of dark tea fully fermented from the leaves of Camellia sinensis (L.) O. Kuntze var. sinensis, and identified as N-(2-hydroxyphenyl)-2-pyrrolidinone (1), p-hydroxyacetophenone (2), salicifoliol (3), (-)-3-hydroxy-β-ionone (4), p-hydroxy ethyl cinnamate (5), ethyl 4-(sulfooxy)benzoate (6), (+)-matairesinol (7), (-)-pinoresinol (8), (+)-lirioresinol-A (9), and caffeine (10), among which compound 1 was isolated as a new natural product, and compound 6 was isolated from Theaceae family for the first time. Compounds 3, 4, 5, 7, 8, and 9 were isolated from this species for the first time.     

Lignan and terpene constituents from the aerial parts of saussurea pulchella

Chromatographic separation of the MeOH extract from the aerial parts of Saussurea pulchella led to the isolation of seven terpenes (1-4, 11-13), and eight phenolics (5-10, 14-15). Their structures were determined by spectroscopic means to be (3S)-3-O-(3',4'-diangeloyl-beta-D-glucopyranosyloxy)-3,7-trimethylocta-1,6-diene (1), 7delta-methoxy- 4(14)- oppositen-1beta-ol (2) 4(15)- eudesmene-1beta, 6alpha-diol (3), 3alpha-hydroxy-5, 6-epoxy-7-megastigmen-9-one (4), (+)-syringaresinol (5), (7S, 8R, 8'R)-5,5'-dimethoxylariciresinol (6), 8alpha-hydroxypinoresinol (7), (7'R, 8'R)-2,2'- dimethoxy-4- (3-hydroxyl-propenyl)-4'-(1,2,3-trihydroxypropyl)-biphenyl ether (8), 4-allyl-2,6- dimethoxyphenyl glucoside (9), 2-methoxy-4-(2-propenyl)phenyl beta-D-glucoside (10), (-)-oplopan-4-one- 10alpha-O-beta-D-glucoside (11), linalyl-O-beta-D-glucoside (12), amarantholidoside IV (13), (+)-1-hydroxypinoresinol 1-O-beta-D-glucoside (14), and syringin (15). Compounds 1-3 and 8-13 were first isolated from the genus Saussurea. The isolated compounds were examined for cytotoxic activity against four human cancer cell lines in vitro using the sulforhodamin B bio assay method.     

白花前胡丙素C-3′和C-4′反式结构类似物的半合成白花前胡丙素C-3′和C-4′反式结构类似物的半合成

目的对白花前胡丙素［(+)-praeruptorin A］进行结构修饰,半合成C-3′和C-4′反式结构类似物,寻找活性化合物。方法首先从白花前胡(Peucedanum praeruptorum)根中分离得到白花前胡丙素,从白花前胡丙素出发,运用碱水解及各种酰化反应,半合成各种结构修饰产物。结果首次合成了17个白花前胡丙素C-3′和C-4′反式结构类似物,通过IR,¹HNMR,MS等方法确定它们的结构。结论17个化合物均为新化合物,其中一些新化合物有显著的钙离子拮抗活性,首次证明C-3′和C-4′反式结构的这类化合物同样具有活性。     

Two new neolignans from the stems of Euonymus oblongifolius

Two new neolignans, (+)-(7R,8R)-4-hydroxy-3,3',5'-trimethoxy-8',9'-dinor-8,4'- oxyneoligna-7,9-diol-7'-aldehyde (1) and (?-?)-(7S,8R)-4-hydroxy-3,3',5'-trimethoxy-8', 9'-dinor-8,4'-oxyneoligna-7,9-diol-7'-aldehyde (2), were isolated from the stems of Euonymus oblongifolius. Their chemical structures were determined according to HR-ESI-MS, CD, 1D and 2D NMR spectroscopic analyses.     

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...