新型拟天然芪类拓扑异构酶Ⅰ抑制剂的设计与合成

为了寻找新型抗肿瘤药物先导,设计合成了23个含噻唑环的天然芪类似物,其结构均经NMR和ESI-HRMS表征确证.通过Top1-介导的松散实验筛选了目标化合物的拓扑异构酶I(Top1)抑制活性,其中(E)-5-溴-2-(2-氯苯乙烯基)-4-对氟苯基噻唑(6k)显示出了良好的Top1抑制活性.同时通过分子对接研究其构效关...     

Synthesis and cytotoxic activity of 7-alkynyl camptothecin derivatives

Several 7-alkynyl camptothecin derivatives were prepared via Sonogashira coupling.And anti-tumor activities of these compounds were evaluated against human esophageal cancer cell line (Eca-109),human chronic myeloid leukaemia cell line (K562),bladder cancer cell line (5637) and gastric cell line (SGC7901).Compounds 9a-d and 10a exhibited remarkable in vitro cytotoxic activity,compared with topotecan.     

Design,synthesis and biological evaluation of E-ring modified evodiamine derivatives as novel antitumor agents

A series of novel E-ring modified evodiamine derivatives were designed and synthesized as antitumor agents. Their capacity to interfere with the catalytic activity of topoisomerase Ⅰ and Ⅱ was evaluated by the relaxation assay. In vitro antitumor activity results revealed that compound 12 showed good antitumor activity with a broad spectrum. Its binding modes with topoisomerase Ⅰ and Ⅱ were clarified by molecular docking.     

(E)-N-(4-苯乙烯基)丙烯酰胺类DNA拓扑异构酶Ⅱα抑制剂的合成及抗肿瘤活性研究

人DNA拓扑异构酶Ⅱα (topoisomerase Ⅱα,Topo Ⅱα)是重要的抗肿瘤药物靶标之一.为发现新的高效、低毒TopoⅡα抑制剂,本研究通过对先导化合物CL-2进行骨架跃迁,设计合成了18个(E)-N-(4-苯乙烯基)丙烯酰胺衍生物(A1～A9,B1～B9).18个化合物对人三阴性乳腺癌MDA-MB-23...     

Synthesis,Docking and Biological Evaluation of Isoquinolonic Acid Derivatives

A series of isoquinolonic acid derivatives（4a-4o） was synthesized via one-pot synthesis for their anti-tumor activity. The structures of all the targeted compounds were confirmed by IH nuclear magnetic resonance （IH NMR） spectrometry and mass spectrometry（MS）. The anti-tumor activities of compounds 4a-4o against MG63（human osteosarcoma cells） and B16-F10（mouse melanoma cells） were examined. To evaluate the antitumor effect of the as-synthesized compounds, we compared the half maximal inhibitory concentration（1C50） of compounds 4a--4o to that of camptothecin（CPT） which appeared to be active against a broad range of human cancers. Among all the compounds, compound 41 shows the most potent biological activity against MG63 cells[IC50=（2.16i0.26） μmol/L] and B16-F10 cells[IC50=（6.95±0.24）μmol/L], thus providing useful information for the antitumor activity and potential practical use of isoquinolonic acid compounds. In addition, we screened out an efficient compound（41） that shows potential inhibit activity against Topoisomerase 1（Topo 1） by docking simulation.     

Syntheses and Anti-cancer Activities of Derivatives of Tetrandrine and Fangchinoline

A series of derivatives of tetrandrine and fangchinoline was designed and synthesized to find more active anti-cancer compounds. Their anti-cancer activities were tested against human hcpatocellular carcinoma BEL-7402 and PLC/PRF/5 cells, human lung adenocarcinoma A549 cells as well as human leukaemia K562 cells, and the structure-activity relationship（SAR） was also studied. All the compounds except BI exhibited superior inhibitory ac- tivities against PLC/PRF/5 cells with half maximal inhibitory conccntration（ICs0） values of less than 15 μmol/L, and compounds A2, A4, B2 and B4 showed IC50 values of less than 9 pmol/L. Compounds A2, A6, B2 and B4 showed potent anti-cancer activities against all the tested cells with 1C5o values of less than 10 pmol/L. The results show that terandrine and fangchinoline derivatives are potential suppressors to human cancer.     

白藜芦醇衍生物的合成及抑制宫颈癌HeLa细胞肿瘤活性

以白藜芦醇、氯乙酰氯、对甲苯磺酰氯、对甲苯甲酰氯为原料,合成9种新的白藜芦醇衍生物,其结构经IR,1HNMR,13C NMR和HRMS所表征.用3-(4,5-二甲基噻唑-2)-2,5-二苯基四氮唑溴盐(MTT)法测试了目标化合物抑制宫颈癌HeLa细胞的肿瘤活性,结果表明:化合物4a,6a,7b,8b和11c对HeLa细胞的抑制活性比白藜芦醇高,其中化合物6a和8b的抑制效果最明显,其IC50值分别为22.7和18.0μmol/L,活性高于白藜芦醇(IC50=114μmol/L),且在150μmol/L浓度下对HeLa细胞的抑制率达95.5%和87.7%.     

新型N~6-哌嗪取代腺苷衍生物的合成及其抗肿瘤活性

以腺苷为母体,对其N6-位进行结构改造,首先经邻位双羟基保护,N6-位氯代,再在N6-位引入哌嗪环制得中间体2',3'-异丙叉-6-哌嗪嘌呤核苷(4);4与N-氯乙酰苯胺类似物(6a~6h)偶联后脱除邻位双羟基保护合成了8个新型的N6-哌嗪取代腺苷衍生物(8a~8h),其结构经1H NMR,13C NMR和HR-ESI-MS表征。采用MTT法研究了8a~8h对Hela肿瘤细胞的抑制活性。结果表明:大部分目标化合物对Hela肿瘤细胞具有较好的抑制活性,其中2-{4-[9-(3,4-二羟基-5-羟甲基-四氢呋喃-2-基)-9H-嘌呤-6-基]-哌嗪-1-基}-N-(3-氟苯基)-乙酰胺(8e)的活性最好,IC50为21.74μmol·L-1。     

片螺素D (LMD)及其衍生物的研究进展

片螺素(Lamellarins)是一类从前腮亚纲软体动物中分离的具有较强生物活性的海洋吡咯生物碱, 迄今已发现40余种. 片螺素D (LMD)是片螺素系列化合物中生物活性最强的, 是继喜树碱(CPT)之后的一种新的拓扑异构酶1抑制剂, 对一系列癌细胞具有很强的细胞毒性, 并作用于细胞线粒体, 影响细胞周期, 诱导细胞凋亡. 结合作者的研究工作, 综述了LMD及其衍生物的最新研究进展, 重点介绍其化学合成(包括合成中心吡咯环和以吡咯环为中心的两大类合成方法), 并展望了该领域今后的发展趋势.     

Synthesis of benzocycloheptene derivatives as CCR5 antagonists with potent anti-HIV activity

A series of novel benzocycloheptene derivatives have been synthesized.Their structures were confirmed by MS and ^1H-NMR. These compounds exhibited potent anti-HIV-1 activities.     

Synthesis,Crystal Structure and Antitumor Activity of a New Coordination Polymer [Cd（C（14）H（10）N3O5）2（C5H5N）2]n

A new cadmium coordination polymer,[Cd(C14H10N3O5)2(C5H5N)2]n,has been synthesized by the reaction of 2-hydroxy-N'-(4-nitrobenzoyl)benzohydraizide with cadmium acetate in pyridine and ethanol mixture solution.Its molecular structure was characterized by elemental analysis,IR spectra and X-ray crystal structure determination.Crystal data for this compound:tetragonal,space group I41/a,Mr=871.10,a=16.960(6),b=16.960(6),c=28.612(6) ,V= 8230(4)3,Z=8,Dc=1.406 g·m-3 and F(000)=3536.the final R=0.0326,wR=0.0847 for 2682 observed reflections with I 2σ(I) and R=0.0460,wR=0.0896 for all reflections.In the molecular structure of the complex,the cadmium atoms are coordinated to four N and two O atoms forming a slightly distorted octahedral geometry.The intermolecular hydrogen bonds link the neighboring molecules to form a coordination polymer which was then evaluated for its anti-tumor activities against two kinds of cell lines (K562 and BGC) by MTT method.A preliminary bioactivity study indicates that the complex has distinct inhibitory effect on K562 cell lines.     

Cytotoxic activity and DNA binding of naphthalimide derivatives with amino acid and dichloroacetamide functionalizations

A series of novel naphthalimide derivatives modified by amino acids and their dichloroacetamide derivatives at the 3-position have been synthesized. Their cytotoxic activities were preliminarily evaluated against Hela, A549 and K562 cells, which showed that the length of the side chains of the amino acids influenced the cytotoxic activities. Moreover, compound 7d showed a very good cytotoxic activity against A549 cells with an IC50 value of 4.78 mmol Là1. Furthermore, the UV–vis, fluorescence,and circular dichroism(CD) spectroscopies and thermal denaturation experiment indicated that compounds 6a, 6d and 7a, 7d, as DNA intercalators, exhibited binding affinities with calf-thymus DNA(Ct-DNA).     

Discovery of a series of pyridopyrimidine derivatives as potential topoisomerase I inhibitors

A series of new 3-benzoheterocyclic substituted pyridopyrimidines were designed and synthesized. Structures of the compounds were determined by IR, 1H NMR, and elemental analyses. The anti- proliferation activity of 13 novel compounds was evaluated in A549, HL-60, BGC-823 and SMMC-7721 cell lines. Compounds 3, 5, 7, 8, 9,10 showed potent inhibitory activity against the four tested cancer cell lines. These six compounds were examined for Top I inhibition at 100 μmol/L by measuring the relaxation of supercoiled DNA in plasmid pBR322. Most of the tested compounds inhibited the enzyme at this concentration. The most potent compound 9 was as potent as camptothecin.     

Novel dihydropyrazole derivatives linked with multi（hetero）aromatic ring： Synthesis and antibacterial activity

Eight novel heterocycle-substituted dihydropyrazole derivatives were synthesized and characterized by ESI-MS,~1H NMR and ~(13)C NMR.All of the compounds have been screened for their antibacterial potential in vitro against Bacillus subtilis, Staphylococcus aureus,Escherichia coli and Pseudomonas aeruginosa.The results show that compounds 9b,9g and 9h displayed significant activity with MIC values in the range of 0.39-1.562μg/mL against B.subtilis.     

Triazole and Benzotriazole Derivatives as Novel Inhibitors for p90 Ribosomal S6 Protein Kinase 2： Synthesis, Molecular Docking and SAR Analysis

A series of triazole and benzotriazole derivatives as novel p90 ribosomal S6 protein kinase 2 （RSK2） inhibitors were designed and synthesized. The in vitro activities against RSK2 were evaluated, and among 14 compounds, compounds 5, 6, 11, 12, 13 and 14 exhibited enzyme IC50 values of 8.91, 2.86, 3.19, 3.05, 4.49 and 2.09 μmol/L re- spectively. The proposed binding modes were simulated using molecular docking method, and the docking results coupled with the stmcture-activi1：y relationship （SAR） analysis indicated that all these active compounds bound to the RSK2 ATP binding site at NTKD, and the electron-donating groups on the 4-position of phenyl were the deter- minant point for the inhibitory activity.     

Efficient and mild cyclization procedures for the synthesis of novel 2-amino-4H-pyran derivatives with potential antitumor activity

A series of novel 2-amino-4H-pyran derivatives have been synthesized via a three-component reaction of α,β-unsaturated ketone derivatives, malononitrile, aldehydes in excellent yields, using DBU as a catalyst and ethanol as a cheap, safe, and environmentally benign solvent under mild conditions. Their antitumor activity was evaluated in three human tumor cell lines, including human colon cancer （HCT116）, human cervical cancer （Hela）. and non-small cell lung cancer （H1975）.     

四氢吡啶并[4,3-d]二氢嘧啶酮衍生物的合成及其初步抗癌活性测定

为寻找新型抗癌药物的先导化合物,设计合成了16种未见文献报道的四氢吡啶并[4,3-d]二氢嘧啶酮衍生物2a～2p,结构经1H NMR,IR,MS,元素分析确证.初步的生物活性测试结果表明,在100μg/mL浓度下,目标化合物对白血病K562细胞的增殖表现出显著的抑制活性,对卵巢癌HO-8910和肝癌SMMC-7721细胞系的增殖也表现出一定的抑制活性.     

Synthesis and Antitumor Activities of 1,3,4-Thiadiazole Derivatives Possessing Benzisoselenazolone Scaffold

A series of novel 1,3,4-thiadiazole derivatives possessing benzisoselenazolone scaffold were designed and synthesized, and their antitumor activities against human cervix adenocarcinoma（HeLa）, human liver cancer cell（SMMC-7721）, human breast cancer cell（MCF-7） and human lung cancer cell（A549） lines were evaluated by CCK-8 assay, The bioassay results demonstrate that most of the tested compounds showed potent antiproliferative effects against various cell lines. Furthermore, compounds 7c, 7e, 7h, 7i and 7k showed significant antiproliferative activities against SMMC-7721 cells, with IC5o values of 2.38, 2.67, 1.35, 2.75 and 2.48 μmol/L, respectively. Com- pounds 7a, 7e, 7j and 71 exhibited highly effective antitumor activities against MCF-7 cells, with IC50 values of 2.89, 2.95, 1.12 and 2.75 μmol/L, respectively. Compound 7j was found to be the most potent compound against A549 cells, with an IC50 value of 1.25 μmol/L. The pharmacological results suggest that the substituents of benzylthio-moiety at position 2 on 1,3,4-thiadiazole are vital for modulating antitumor activities against various cancer cell lines.     

N-(5-邻氯苯基-2-呋喃甲酰基)甘氨酰胺及酰肼类衍生物的合成与生物活性

甘氨酸;邻氯苯基呋喃甲酸;酰胺;酰肼;衍生物;合成;K562细胞;MTT比色法     

Synthesis and Antitumor Activity of a New 7-Azaindole Derivative

We designed and synthesized a 7-azaindole derivative（TH1082）, which was characterized by 1^H NMR and 13^C-NMR. We investigated its antitumor effects on human melanoma A375 cells, human liver cancer SMMC cells and human breast cancer MCF-7 cells in vitro via 3-（4,5-dimethyldiazol-2-yl）-2,5-diphenyl-tetrazolium bromide （MTT） assay and also explored the mechanism of antiproliferation of them. The results show that TH1082 significantly inhibited the proliferation of these cells to different extent. The IC50 values for A375 cells, SMMC cells and MCF-7 cells were 25.38, 48.70 and 76.94 μg/mL at 24 h, respectively. To observe cell morphological changes, acridine orange/ethidium bromide（AO/EB） staining and Hoechest33342/Pl staining were carried out. These results indicate that TH1082 could induced the apoptosis of A375 cells. The apoptotic rates were （9.5±2.09）%, （18.9±2.25）% and （39.5±2.02）%（5, 10 and 20 μg/mL） for A375, SMMC and MCF-7 cell lines, respectively. Further, we determined the activities of caspase-3 and caspase-9 in A375 cells treated with TH1082 at different concentrations（0, 5, 10 and 20 μg/mL） or Z-VAD-FMK（20 μmol/L）, a pan-caspase inhibitor for 24 h. The results show that TH1082 activated caspase-3 and caspase-9, and the activation could be blocked by Z-VAD-FMK. Taken together, these findings indicate that TH 1082 could inhibit the proliferation ofA375 cells via activating caspase-3 and caspase-9.