中国番荔枝科植物抗癌有效成分研究

介绍了近年来我们实验室中国番荔枝科植物抗癌有效成分研究工作。从番荔枝科5种紫玉盘属植物,5种哥纳香属植物,1种番荔枝属植物,1种囊瓣木属植物中分离得到59种新的番荔枝内酯,32种新的多氧取代环己烯,12种新的苯乙烯吡喃酮和3种新的生物碱,并通过化学和光谱方法鉴定了它们的结构。大部分化合物显示了较强的抗癌活性。并对抗癌活性成分海南哥纳香醇甲进行了全合成。     

哥纳三醇类似物抗A2780肿瘤细胞活性及三维定量构效关系研究

以合成的54个哥纳三醇类似物为研究对象, 测试了其体外抑制肿瘤A2780细胞株的活性, 对其中的37个化合物用比较分子力场(CoMFA)研究了哥纳三醇类似物结构与抑制A2780肿瘤细胞活性的三维定量构效关系, 提出了对哥纳香醇甲结构改造的方法, 对寻找更好活性的化合物有重要的指导意义     

景洪哥纳香生物碱的MS-MS 及GC-MS研究

蕃荔枝科哥纳香属植物常作为药用植物使用,可以治疗水肿、风湿病等.哥纳香属植物中生物碱部分包括了阿卟菲类生物碱,1-aza-anthrquinone类生物碱等.本文在利用质谱的不同方法对单体化合物进行裂解特征的研究基础上,采用GC-MS研究了生物总碱中的化学成分.     

景洪哥纳香和大叶紫玉盘化学成分研究

从景洪哥纳香和大叶紫玉盘根醇提物中，采用色谱分离方法，分别得到43个和 33个化合物，通过波谱技术和化学方法鉴定了这些化合物的结构。其中，从景洪哥 纳香根中得到1个新化合物，命名为8－乙酰基－9－去氧哥纳香吡喃吡喃酮（1）； 从大叶紫玉盘根中得到1个新化合物，命名为大叶素A（2）。另外，从景洪哥纳香 根中，还分离得到一个神经鞘胺醇苷成分混合物asteriacerebrosides (3)，并通 过GC－MS技术，鉴定了该混合物的脂肪酸部分（FAM）和长链胺部分（LCB）的种类 数目及碳链长度。结果表明，3中脂肪酸部分，含7个脂肪酸，碳链长度分别是16, 18, 19, 20, 21, 22和23个碳；其长链胺部分包含5个脂肪胺，对应链长度为21， 22，23，24和25个碳。     

龙涎香香原料卷烟应用及降龙涎醚的合成研究进展

介绍了龙涎香的组成及龙涎香香原料在卷烟工业中的应用,并从半合成的角度对降龙涎香醚的合成进行了综述。降龙涎香醚的合成主要以具有类似结构的植物提取物香紫苏醇为原料,重点阐述了合成过程中的重要中间体及副产物的生成,并详细介绍了反应机理,参考文献44篇。     

日香桂根的化学成分研究（III）

利用柱层析法（硅胶,C18）从日香桂根的乙酸乙酯提取物中分离出8个单体化合物［女贞苷(1),连翘苷（2）,(+)-羟基松脂醇-1-O-β-D-葡萄糖(3),(+) 环橄榄树脂素(4), 2α,3β-二羟基乌苏-12-烯-28酸(5),对羟基苯乙醇(6),(-) 橄榄脂素(7)和橄榄树脂素-4-O-β-D-葡萄糖苷(8)］,其结构经₁H NMR和¹³C NMR确证。5为首次在木犀科植物中发现,4为首次在木犀属植物中发现,2, 3, 7和8为首次在日香桂植物中发现。     

基质固相分散-高效液相色谱法测定五味子中尼哥纳乐酸

提出了基质固相分散一高效液相色谱法测定五味子中的尼哥纳乐酸的方法.将样品与硅胶以质量比1比4混合研磨后装入固相萃取柱,用纯的二氯甲烷以5 mL·min-1的流量淋洗,以除去共存干扰物.用二氯甲烷-丙酮(9+1)混合液将尼哥纳乐酸从固相萃取柱上洗脱,吹氮浓缩后,以ZORBAX Stable Bound C<,18>(4.6 mm× 100 mm,1.8μm)快速分离柱为固定相,甲醇-水(82+18)为流动相,用蒸发光散射检测器检测.峰面积与尼哥纳乐酸的质量浓度在2.0～400.0 mg·L-1范围内呈线性关系,检出限(3S/N)为20μg·L-1.用此法分析五味子样品,所得结果的相对标准偏差(n=7)小于2.0%,标准加入回收率在96.8%～101.5%之间.     

日香桂根的化学成分研究(Ⅲ)

利用柱层析法(硅胶,C18)从日香桂根的乙酸乙酯提取物中分离出8个单体化合物[女贞苷(1),连翘苷(2),(+)-羟基松脂醇-1-O-β-D-葡萄糖(3),(+)-环橄榄树脂素(4),2α,3β-二羟基乌苏-12-烯-28酸(5),对羟基苯乙醇(6),(-)-橄榄脂素(7)和橄榄树脂素-4-O-β-D-葡萄糖苷(8)],其结构经1H NMR和13C NMR确证。5为首次在木犀科植物中发现,4为首次在木犀属植物中发现,2,3,7和8为首次在日香桂植物中发现。     

乌骨藤中五环三萜类化合物的分离鉴定

利用硅胶柱色谱法、Sephadex LH-20凝胶柱色谱法及半制备高效液相色谱法,从乌骨藤的正丁醇萃取物中分离得到4种五环三萜类化合物。利用核磁共振谱、质谱、红外光谱等分析方法对化合物结构进行了分析和表征,确定了4种化合物分别为β-香树脂醇(β-amyrin)、白桦酯醇(betulin)、白桦酯酸(betulinic acid)和羽扇豆醇(lupeol),它们为首次在牛奶菜属植物中发现,其中后3种化合物具有抗肿瘤活性。     

海南九里香化学成分的研究

九里香[Murraya paniculata(L.)Jack.]属芸香科(Rutaceae)植物,民间主要用于活血散瘀、消炎止痛.广东省阳山县和云南西双版纳产的九里香中所含的化学成分我们已有报道.在我们研究此植物的抗凝血活性成分的过程中,从海南九里香叶和细枝中得到四种香豆精化合物(1a～d)和一种黄酮化合物,其中海南九里香内酯(1a)(hainanmurpanin)为新化合物.本文报道它们的分离和结构鉴定. 化合物1a,C_(17)H_(18)O_6的紫外光谱显示7-甲氧基-8-烷基香豆精的特征吸收;红外光谱显示三个羰基和芳环的吸收;根据核磁共振谱提供的共振信号,可以推测1a的化学结构为     

5-methoxyaristololactam I, the first natural 5-substituted aristololactam from Asarum ichangense

A new aristololactam, 5-methoxyaristololactam I (1), was isolated from an ethanol extract of the whole plant of Asarum ichangense C. Y. Cheng et C. S. Yang, together with twenty known compounds (2-21). The structure of 1 was elucidated by spectroscopic methods. Compounds 11, 13, 17, and 19 were isolated from Aristolochiaceae for the first time. Compounds 2, 14, and 15 are considered as common constituents of the genus Asarum.     

On-line (HPLC-NMR) and off-line phytochemical profiling of the Australian plant, Lasiopetalum macrophyllum

On-line (HPLC-NMR) and off-line (HPLC, NMR and MS) methodologies were used to profile the constituents present in the crude extract of Lasiopetalum macrophyllum. On-flow and stop-flow HPLC-NMR supported the presence of trans-tiliroside and permitted partial identification of cis-tiliroside and 4'-methoxy-trans-tiliroside. Off-line isolation led to the unequivocal identification of four flavanoid glycosides including a new structural derivative, 4'-methoxycis-tiliroside. This is the first report of flavonoid glycosides occurring in this plant genus. In addition, a number of structure revisions have been proposed for previously reported flavonoid glycosides that were incorrectly assigned.     

New Drimane Sesquiterpenoids from Tidestromia oblongifolia

From an acetone extract of the aerial parts of Tidestromia oblongifolia (Amaranthaceae), a new drimane sesquiterpenoid bearing an 11,12,13-trihydroxydrimene skeleton (1) as well as the 11,12 acetonide of 1 were isolated. Three known stigmastane triterpenoids were also isolated. Structures were elucidated with the aid of 1D and 2D NMR spectroscopic techniques. The absolute configuration of 1 was confirmed by single-crystal x-ray crystallography. This is the first report on phytochemical constituents from any plant of the genus Tidestromia and is the first report of the occurrence of drimanes in the Amaranthaceae.     

On-line (HPLC-NMR) and off-line phytochemical profiling of the Australian plant, Lasiopetalum macrophyllum

On-line (HPLC-NMR) and off-line (HPLC, NMR and MS) methodologies were used to profile the constituents present in the crude extract of Lasiopetalum macrophyllum. On-flow and stop-flow HPLC-NMR supported the presence of trans-tiliroside and permitted partial identification of cis-tiliroside and 4'-methoxy-trans-tiliroside. Off-line isolation led to the unequivocal identification of four flavanoid glycosides including a new structural derivative, 4'-methoxy-cis-tiliroside. This is the first report of flavonoid glycosides occurring in this plant genus. In addition, a number of structure revisions have been proposed for previously reported flavonoid glycosides that were incorrectly assigned.     

冬凌草的化学成分研究

采用硅胶柱层析方法从冬凌草的全草乙醇提取物中分离了7个化合物,通过理化性质和波谱分析方法分别鉴定为豆甾醇(Ⅰ),β-谷甾醇(Ⅱ),冬凌草乙素(Ⅲ),lasiodon in(Ⅳ),冬凌草甲素(Ⅴ),5,3,′4′-三羟基-6,7-二甲氧基黄酮(Ⅵ)和胡麻素(Ⅶ).化合物Ⅰ为首次从该属植物中分得,化合物Ⅵ为首次从该植物中分得.     

Two New Styryllactones from Goniothalamus cheliensis

Two new styryllactones,iso-goniopypyrone and 8-acetyl-9-deoxygoniopypyrone,were isolated from the roots of Goniothalamus cheliensis.Their structure were elucidated on the basis of spectroscopic and chemical evidences.     

New Alkaloids from the Rhizomes of Goniothalamus Griffithii

GoniothalamusgrghthiiHook.F.etThoms(Annonaceae)isatropicalplantdistributedinsouthChina,IndiaandThailand.InwiderangescreeningfOrantitumoragentsfromAnnonaceaeplants,thecthanolicextractofrhizomesofG.grghthiiwasfOundtohc-..activeagainstvarioushumancancercelllines.Furtherpuriflcationoftheextractyieldedthreenewalkaloids,griffithdionel,griffiazanoneA2andgriffiazanoneB3wh()scstructuresweree1ucidatedbyvariousNMRtechniques,includingHMBC,NOEexperiments.(R)-and(S)-MTPAderivativeswerepreparedtod…     

Leiocyclocin A and B, Two Cyclopeptides from Goniothalamus leiocarpus

Ongoing phytochemical studies on Goniothalamus species have led to the isolation of a number of annonaceous acetogenins and unusual new styryllactones which were found to possess significant cytotoxic activities against several hunan tumour cell lines1,2. Firstly, cyclopeptides were reported to be isolated from genus Goniothalamus in this paper.Goniothalamus leiocarpus is an evergreen tree which grows in the south of Yunnan, China. Four new anticancer styryllactones3,4 from the stem bark and…     

Alkaloids from the root barks of Goniothalamus cheliensis

（3S）-2-Oxo-5,12-dimethoxy-3-hydroxy-3-methylbenz[f]indoline （1）, a new benzoxindole alkaloid, along with two known alkaloids, was isolated from the root barks of Goniothalamus cheliensis Hu. The structure was elucidated by spectroscopic evidences, and the absolute configuration was determined by CD spectrum.