长春西汀药理作用机制研究进展

长春胺是从小蔓长春花中分离得到的一种生物碱,长春胺衍生物长春西汀在中风后遗症、老年痴呆、神经性耳鸣及耳聋、美尼尔氏综合症、缺血性眼底疾病等复杂性疾病方面有一定的疗效.从近年来长春西汀药理作用研究进展着手,进一步探讨其发挥临床疗效的机制.     

丹皮酚异丁酸酯类衍生物的合成及体外降血脂活性研究

目的 研究丹皮酚异丁酸酯类衍生物的合成,寻找比先导化合物丹皮酚降血脂活性更佳的目标化合物.方法 以丹皮酚为原料,碱性条件下与α-溴代异丁酸发生取代反应,再与不同的醇成酯;以HepG2高血脂细胞实验、脂肪酶活性抑制和胆酸盐结合能力实验研究丹皮酚异丁酸酯类衍生物的体外降血脂活性.结果 合成得到6个丹皮酚异丁酸酯类衍生物,化...     

不同产地小蔓长春花中长春胺的含量测定

目的测定不同产地小蔓长春花中生物碱长春胺的含量。方法采用岛津CS-930双波长薄层扫描仪，单波长线形扫描，以长春胺为标准品，平行测定不同产地种植的小蔓长春花中（主要是叶子）长春胺的含量。结果各样品中长春胺的含量随其生长环境及生长季节而不同。结论本法简便可靠，可作为小蔓长春花种植及资源合理利用的检测手段。     

9-O-(4'-胺丁基)小檗碱的合成

目的:为了使小檗碱能与一定的化学成分拼接,很大程度上需要形成一个中间体。通过设计与实验,合成出9-O氨基小檗碱衍生物。方法:以小檗碱为起始物,通过去甲基、溴代、氨基化等反应,先后制得小檗红碱,9-O-(4’-溴丁烷)小檗碱,最终合成9-O-(4’-胺丁基)小檗碱,并通过波谱手段确定其相对分子质量和分子结构。结果:通过一系列化学反应有机合成成功制得小檗红碱与9-O-(4’-溴丁烷)小檗碱,通过对文献方法的综合、优化制备出9-O-(4’-胺丁基)小檗碱衍生物,并通过ESI-MS、核磁谱确定了其相对分子质量、分子式以及分子结构。结论:通过对方法的优化,大大提高了产物9-O-(4’-胺丁基)小檗碱的得率,并且合成过程简便易操作。从目标物结构来看,端基为氨基,是活泼的基团,可与多种化学基团进行反应,进而引入新的基团,合成得到更多衍生物。     

HPLC测定长春西汀注射液的有关物质

目的:应用高效液相色谱法测定长春西汀注射液的有关物质.方法:采用Hypersil ODS C18色谱柱(4.6 mm×150 mm,5μm),甲醇-1·75 g·L-1碳酸铵溶液-乙酸(80∶25∶3)为流动相,流速1.0 mL· min-1,检测波长273 nm.结果:在选定的色谱条件下,长春西汀与有关物质分离完全,最低检测限为20 ng,精密度良好(RSD 0.52％).结论:方法简便、准确、专属性好、灵敏度高,可用于长春西汀注射液的有关物质测定.     

长春西汀联合疏血通注射液治疗急性脑梗死34例

目的观察长春西汀联合疏血通注射液治疗急性脑梗死的疗效。方法将患者随机分为两组,对照组给予疏血通注射液治疗,治疗组予长春西汀联合疏血通注射液;均同时使用脱水剂、营养神经剂治疗;疗程14d。结果治疗组疗效优于对照组。结论长春西汀联合疏血通注射液治疗急性脑梗死疗效显著。     

6,7-二甲氧基-4-芳胺基喹唑啉衍生物的合成与活性筛选

 目的合成6,7-二甲氧基-4-芳胺基喹唑啉衍生物及其抗肿瘤活性筛选。方法以2-氨基-4,5-二甲氧基苯甲酸和醋酸甲脒为原料,合成了10个4位芳胺取代的6,7-二甲氧基喹唑啉衍生物,利用酶联免疫吸附分析法(ELISA)PTK-101试剂盒并对化合物进行活性筛选。结果合成的化合物经IR,¹H-NMR,MS结构表征。初步的生物活性测试表明,这类化合物对表皮生长因子受体(EGFR)酪氨酸激酶有明显的抑制活性。其苯环4′位的取代基变化对活性具有显著影响。结论6,7-二甲氧基-4-芳胺基喹唑啉衍生物可能会在治疗肿瘤特别是非小细胞肺癌方面发挥更大。     

中西医结合治疗中风后遗症疗效观察

目的:观察大黄附子当归汤配合西药长春西汀治疗中风后遗症的临床疗效。方法:选取中风后遗症患者106例,随机分为两组。治疗组64例选用大黄附子当归汤配合西药长春西汀治疗,对照组42例采用长春西汀配合内科其他常规治疗。结果:治疗组临床总有效率89.1%,对照组总有效率64.3%,两组比较有显著差异(χ2=9.795,P0.05)。治疗组在肢体功能、感觉恢复、言语障碍等方面改善显著优于对照组。结论:大黄附子当归汤配合西药长春西汀治疗中风后遗症可以明显改善中医证候,对于改善肢体功能、提高日常生活行为的能力具有明确的疗效。     

基于均相时间分辨荧光高通量筛选模型的脱氢枞胺衍生物酪氨酸激酶抑制活性研究

蛋白酪氨酸激酶已成为引人注目、治疗多种疾病的新靶点。本研究建立了基于均相时间分辨荧光技术的高通量筛选模型,用于筛选脱氢枞胺系列衍生物的酪氨酸激酶抑制活性。构效关系分析发现具有氮侧链的脱氢枞胺衍生物有较好的酪氨酸激酶抑制活性,有卤素取代苯环基的脱氢枞胺衍生物具有较好的表皮生长因子受体抑制活性。该研究结果显示：脱氢枞胺衍生物经结构改造有望开发成为一类新型、多靶点、高效的蛋白酪氨酸激酶抑制剂。     

溴代白杨素衍生物合成及其抗癌活性

目的研究溴取代白杨素衍生物的体外抗癌活性。方法合成溴取代的白杨素衍生物,并通过MTT法检测其对人急性粒细胞性白血病(HL-60)细胞、人结肠癌(HT-29)细胞和人胃癌(SGC-7901)细胞增殖抑制作用。结果合成了6个溴取代白杨素衍生物。结论溴取代白杨素衍生物具有良好的抗癌活性(IC50=0.85~11.60μmol/L)。     

Chemistry of Saururus cernuus, VI: Three new neolignans

From the relatively more lipophilic fraction of the extract of Saururus cernuus, seven neolignans were isolated of which three, named (-)-saururin, (-)-saururenin, and (+)-saururinone, are new and belong to the 1,4-diaryl-2,3-dimethylbutane group, with saururinone being a novel ketoneolignan. The remaining four were identified as (-)-austrobailignan 6, another member of the 1,4-diarylbutane group, and (-)-calopiptin, (-)-galbacin, and (+)-zuonin A, all three of which belong to the 2,5-diaryl-3,4-dimethyltetrahydrofuran group. Of these, zuonin A has the rarely seen stereochemistry for the tetrahydrofuran ring: 2/3 cis, 3/4 cis, and 4/5 trans.     

含有取代哌嗪及哌啶结构的噻吩并吡啶类化合物的合成及活性研究

 目的 设计合成一系列新型的含取代哌嗪及哌啶的噻吩并吡啶类衍生物,并对其体内抗血小板聚集活性进行了初步评价。 方法 从噻吩并吡啶 ( 1 ) 出发,与氯乙酰氯连接得到关键中间体（ 2 ）,再与一系列取代哌嗪及哌啶连接得到目标化合物（ 3-19 ）。 结果 得到 17 个新化合物,所有化合物结构都经过 ¹ H NMR 及质谱确证。这些化合物都进行了大鼠体内抑制血小板聚集活性测试。其中化合物 10-14 具有较高活性。 结论 该类噻吩并吡啶衍生物有可能成为新型结构的具有抗血小板聚集活性的先导化合物,值得进一步研究。     

L-�����������������ĺϳɼ��俹���������о�

??OBJECTIVE To explore the synthesis of novel phenylalanine dipeptide derivatives and their inhibitory effects on tumor cells. METHODS Starting from L-phenylalanine or L-tyrosine, a series of derivatives were synthesized by reaction with chloroacetyl chloride, followed by condensation with L-phenylalaninol or L-phenylalanine methyl ester hydrochloride and nucleophilic substitution reaction with differently substituted phenol.The cell proliferation inhibiting activities of the derivatives were evaluated by thiazolyl blue tetrazolium bromide(MTT)method.RESULTS Some of the target compounds showed certain inhibitory effect for leukemia cell lines K562 and HEL in vitro.Furthermore, the derivatives 3f and 3q had preferably inhibitory effect on K562 cell line prostate cancer PC3 cells in vitro.CONCLUSION Phenylalanine dipeptide derivatives possess good effect on the leukemia and prostate cancer cells and are worth of further research.     

Meroditerpenoids and derivatives from the brown alga Cystoseira baccata and their antifouling properties

The brown alga Cystoseira baccata harvested along the Atlantic coasts of Morocco yielded seven new meroditerpenoids (1-4) and derivatives (5-7), whose chemical structures were elucidated mainly by 2D NMR and mass spectrometry. Surprisingly, for all these compounds, which possess a bicyclo[4.3.0]nonane ring system, a trans fusion of the bicyclic system was deduced by stereochemical studies even though such compounds isolated from Cystoseira species are known to have a typical cis orientation for the bridgehead methyls. The antifouling and antibacterial activities of compounds 1-5 and 7 were evaluated, as well as their toxicity toward nontarget species. Compounds 4, 5, and 7 showed antifouling activities against growth of microalgae, macroalgal settlement, and mussel phenoloxidase activity, while being nontoxic to larvae of sea urchins and oysters.     

12-亚甲基脲-14-去氧穿心莲内酯衍生物的合成与抗肿瘤活性(英文)

目的:通过对穿心莲内酯引入亲水性基团,探索衍生物的抗肿瘤活性和构效关系。方法:碱性条件下,穿心莲内酯1与硝基甲烷进行Michael加成反应,重排生成12-硝基甲基-14-去氧穿心莲内酯,再以锌粉盐酸还原硝基生成12-氨基亚甲基-14-去氧穿心莲内酯2,最后与异氰酸酯反应成脲3a～3n,所有化合物考察了抗肿瘤和抑制NA活性。结果:经结构改造后,两个化合物(3f和3m)显示了中等的抗肿瘤活性,并且都是单取代芳环,提示芳环的引入优于脂肪链(环)和杂环;所有衍生物都无抑制NA活性。结论:穿心莲内酯对流感病毒神经氨酸酶无抑制活性;12位引入芳环有意义,但芳环所处的支链不能过长;水溶性基团的引入对活性提高没有帮助,具体有待进一步研究。     

Modified taxols, 4. Synthesis and biological activity of taxols modified in the side chain

A number of taxol derivatives substituted at the 2' position of the side chain have been prepared and their biological activities determined in KB cell culture and/or the P-388 in vivo assay. The 2'-(t-butyldimethylsilyl)taxol 5 is essentially inactive, indicating the need for a free hydroxyl group at the 2' position for activity. Epimerization of the 2' position occurred on treatment of 2'-acetyltaxol derivatives with 1,5-diazabicyclo[5.4.0]undec-7-ene, but treatment of 2'-(2,2,2-trichloroethyloxycarbonyl) taxol derivatives with DBU yielded the novel cyclization products 11 and 12 and, after deprotection at the 7 position, 13. The derivative 13 is also essentially inactive in the KB test system. Two taxols with increased H2O solubility were prepared, the 2'-(beta-alanyl) derivative 15 and the 2'-succinyl derivative 16. Although both these derivatives were active in vivo and in vitro, the former was too unstable and the latter not active enough to make suitable H2O-soluble derivatives of taxol.     

氟喹诺酮C-3酰腙的合成与抗菌活性

 目的 评价氟喹诺酮C-3位羧基被酰腙替代对其抗菌活性影响,为进一步扩大结构修饰提供新的途径。方法 第三代氟喹诺酮类药物氧氟沙星及环丙沙星为起始原料,经肼解成其相应的酰肼,然后分别与芳香醛进行缩合得系列C-3酰腙目标化合物。用琼脂稀释法研究了目标化合物体外对标准菌株金黄色葡萄球菌(S. aureus ATCC29213)、大肠埃希氏菌(E. coli ATCC25922)、铜绿假单孢菌(P. aeruginosa ATCC2785)的生长抑制活性。结果 合成了12个新的目标酰腙化合物,体外活性结果表明,氧氟沙星类酰腙化合物表现出较弱的体外抗菌活性(其MIC＞128 μg·mL^-1),而多数环丙沙星类酰腙化合物却表现出较强的体外抗菌活性(其MIC＞8 μg·mL^-1),尤其是香草醛环丙酰腙(5d)对S. aureus及E. coli的MIC≥0.5 μg·mL^-1,对P. aeruginosa的MIC≥1.0 μg·mL^-1,其抗菌活性与对照环丙沙星相当(MIC≥0.5 μg·mL^-1),而优于氧氟沙星(MIC≥2.0 μg·mL^-1)。结论 抗菌药氟喹诺酮C-3位羧基被其他取代基替代值得进一步研究。
     

没药中环阿尔廷烷型三萜的生物转化研究

目的:对爱伦堡没药中分离获得的环阿尔廷-24-烯-1α,2α,3β-三醇开展生物转化研究,以期获得抗肿瘤活性好、结构新颖的环阿尔廷烷型三萜衍生物。方法:采用马铃薯培养基,将底物加入到14株菌株培养液中,27.8℃培养7 d,以TLC检测产物,筛选具有转化能力的菌株;选择微紫青霉开展制备级转化试验,27.8℃培养10d,乙酸乙酯萃取后,硅胶柱色谱分离纯化转化产物,以质谱、核磁共振波谱确定其结构,并采用MTT法测定其对人前列腺癌细胞株生长抑制作用。结果:微紫青霉对底物进行了转化,获得了两个新的环阿尔廷烷型三萜,产率为21.15%;产物对人前列腺癌细胞PC3和DU145具有生长抑制作用,IC50值为14.5和27.8μmol/L。结论:环阿尔廷烷型三萜能被微紫青霉生物转化,产生两个新的羟基化衍生物。     

����L-���������໯�������ơ��ϳɼ��������������ø�����ƻ����о�

??OBJECTIVE To research the effect of new L-phenylalanine derivatives on acetylcholinesterase(AChE) activity. METHODS New L-phenylalanine derivatives were synthesized from substituted 2-bromo-1-acetophenones by four steps reaction, and their inhibitory activities on AChE were measured by Ellman method in vitro. RESULTS The evaluation results showed that most derivatives possessed AChE inhibitory effect and the activity of compound 8b was the most potent with an IC₅₀ value of 8.73??10^-6 mol??L^-1, which was more potent than that of rivastigmine; moreover, compound 8b had no inhibitory activities to BuChE. CONCLUSION The inhibitory activities of new L-phenylalanine derivatives on acetylcholinesterase are worth studying further.
     

14-O-取代冬凌草甲素衍生物的合成及抗肿瘤活性(英文)

目的:探索14-O-取代冬凌草甲素衍生物的合成及其抗肿瘤活性。方法:将二酸酐与冬凌草甲素14位羟基缩合,再与氨基酸酯进行酰胺化反应,合成14-O-取代冬凌草甲素衍生物;采用MTT法测试所有目标化合物体外对肿瘤细胞株(BGC-7901,SW-480,HL-60,BEL-7402,A549和B16)的细胞毒性以及化合物2c和2d对小鼠H22肝癌在体抗肿瘤活性。结果:合成了10个新的目标化合物,其结构均经IR,MS及1HNMR确证;生物活性初筛结果显示,化合物2c,2d和3e有较强的细胞毒活性;化合物2c和2d在体抗肿瘤活性大于环磷酰胺和冬凌草甲素。结论:14-O-取代冬凌草甲素衍生物2c,2d和3e作为潜在的抗肿瘤候选化合物值得进一步深入研究。