紫罗兰酮生物碱异噁唑衍生物的合成及其抗肿瘤转移活性研究

目的 设计并合成紫罗兰酮生物碱异噁唑类衍生物,结合活性筛选,发现具有活性的新型紫罗兰酮生物碱衍生物。方法 制备（R）-紫罗兰酮,在此基础上经过11步有机合成反应制备紫罗兰酮生物碱异噁唑衍生物。目标衍生物经核磁共振波谱和高分辨质谱表征其化学结构。通过乳腺癌细胞趋化迁移实验筛选衍生物的抗肿瘤转移活性。结果 共制备8个目标衍生物,经抗肿瘤转移活性筛选发现,化合物12c活性同Ion-31a相当,强于阳性对照化合物PI3K抑制剂LY294002。结论 所有目标衍生物均为新化合物,其中苯甲腈取代异噁唑化合物12c具有显著抗肿瘤转移活性。     

异噁唑衍生物的合成及其抗菌活性研究

目的 设计并合成异噁唑衍生物,并对其体外抗菌活性进行了初步评价.方法 以3,4-二氟苯甲醛、盐酸羟胺为起始原料,经多步反应合成目标化合物.以利奈唑胺为阳性对照药,对目标化合物的抗菌活性进行评价.结果 合成了9个新化合物,其结构经1H-NMR、MS确证,体外活性测试结果显示,有1个化合物有显著的抗菌活性,与利奈唑胺相当.结论 体外活性试验表明,含异噁唑的所制备化合物作为新型的抗菌剂,其构效关系值得进一步研究.     

麻黄碱的噁唑烷衍生物的合成

近期文献报道了麻黄碱的嗯唑烷衍生物作为前药的研究以及拆分前列脲素中间体的用途;并从麻黄植物中分离出嗯唑烷酮衍生物。本文根据上述资料,从麻黄生物碱出发,合成了2种N-氨基甲酰衍生物,3种席夫碱、8种嗯唑烷和2种(口恶)唑烷酮衍生物。根据元素分析、红外、核磁共振氢谱和质谱,确定了衍生物的结构。经醋酸扭体法和热板法药理试验,衍生物(Ⅳ)有镇痛作用。     

恩诺沙星噁二唑类化合物的合成及抗肿瘤活性

目的寻找氟喹诺酮由抗菌活性转化为抗肿瘤活性的结构修饰策略。方法用噁二唑杂环作为恩诺沙星(化合物1)C-3羧基的等排体,设计合成了12个新的噁二唑类目标化合物(3a-3l),其结构经元素分析和光谱数据确证。用MTT方法评价了目标化合物体外对SMMC-7721、L1210和HL60 3种癌细胞的生长抑制活性。结果目标物对3种实验癌细胞的生长抑制活性显著强于母体化合物(1)的活性。构效关系表明,苯环带羟基或氟原子或磺酰胺基化合物的活性强于其他取代基化合物的活性,其活性与对照阿霉素的活性相当。结论氟喹诺酮C-3羧基并非是喹啉酮羧酸类抗肿瘤活性所必需的药效团,用噁二唑杂环替代可显著提高其抗肿瘤活性。     

吲哚-1,3,4-噁二唑类衍生物的合成及其体外抗肿瘤活性研究

目的 合成吲哚-1,3,4-噁二唑类衍生物,并进行体外抗肿瘤活性研究。方法 以吲哚-3-甲酰肼为起始原料,通过[4+1]环加成反应、水解反应、缩合反应得到目标化合物。采用MTT法测试目标化合物对HeLa、SCG-7901和MDA-MB-231细胞的体外抗肿瘤活性。采用克隆形成实验考察化合物6f对SCG-7901细胞增殖的影响。采用Annexin V-APC/PI双染法检测化合物6f对SCG-7901细胞凋亡和坏死的影响。采用DAPI染色法检测化合物6f对SCG-7901细胞凋亡核染色质形态学的影响。采用DCFH-DA染色法检测化合物6f对SCG-7901细胞中活性氧含量的影响。结果 合成了15个吲哚-1,3,4-噁二唑类衍生物,其结构经¹H-NMR、¹³C-NMR和HR-ESI-MS确证。部分化合物表现出良好的抗肿瘤活性,其中化合物6f对HeLa、SCG-7901和MDA-MB-231 3种肿瘤细胞株均表现出明显的抗增殖作用,且具有一定的选择性。进一步研究表明,化合物6f以浓度相关的方式促进细胞产生活性氧,抑制细胞增殖,诱导细胞凋亡。结论 部分吲哚-1,3,4-噁二唑类衍生物表现出良好的抗肿瘤活性,为该类化合物的进一步抗肿瘤活性研究提供思路。     

水飞蓟宾衍生物的设计合成及抗肿瘤活性研究

目的 设计合成一系列新型水飞蓟宾衍生物，进行生物活性测试及分子对接研究。方法 以天然产物水飞蓟宾为先导化合物，对其C-23位羟基进行结构修饰，设计合成新型水飞蓟宾衍生物；采用MTT法，用人肺癌细胞(A549)和乳腺癌细胞(MCF-7)进行初步体外抗肿瘤筛选；利用计算机辅助药物设计方法分析所合成化合物关键基团与靶蛋白的作用方式。结果 合成了12个未见文献报道的水飞蓟宾衍生物，结构均经¹H-NMR、¹³C-NMR及MS谱确证。活性测试结果表明，化合物Ⅰ₃、Ⅰ₅对肿瘤细胞的抑制活性与阳性对照药alpelisib相当。结论 经过结构修饰后的水飞蓟宾衍生物具有一定的抗肿瘤作用，值得进一步研究。     

恩诺沙星噁二唑硫乙酰腙类化合物的合成及抗肿瘤活性

目的寻找氟喹诺酮C-3羧基等排体的优化方法。方法噁二唑为恩诺沙星C-3羧基的等排体,硫醚酰腙作为修饰侧链,设计合成了C-3噁二唑硫醚酰腙类目标化合物7a~7l,其结构经元素分析和光谱数据确证,评价了目标化合物在体外对SMMC-7721、L1210和HL60 3种癌细胞的抗增殖活性。结果 12个新目标物被合成,它们对3种试验癌细胞的生长抑制活性强于母体恩诺沙星。初步的构-效关系表明,苯环带吸电子基化合物的活性强于其他取代基的化合物,对SMMC-7721细胞的活性与对照阿霉素相当。结论氟喹诺酮C-3羧基并非是抗肿瘤活性所必要的药效团,用功能化侧链修饰的唑杂环替代有利于提高抗肿瘤活性。     

恩诺沙星噁二唑硫酮曼尼希衍生物的合成及抗肿瘤活性

目的为发现氟喹诺酮C-3羧基等排体的优化方法。方法用噁二唑硫酮杂环替代恩诺沙星(1)C-3羧基,以曼尼希碱作为修饰侧链,设计合成了10个新的恩诺沙星C-3羧基等排体——噁二唑硫酮曼尼希碱目标化合物(4a-4j),其结构经元素分析和光谱数据确证。用MTT(3-(4,5-二甲基噻唑-2)-2,5-二苯基四氮唑溴盐)方法评价了目标化合物体外对SMMC-7721、L1210和HL60 3种癌细胞的生长抑制活性。结果目标物对3种实验癌细胞的生长抑制活性强于母体化合物1和中间体噁二唑酮3的活性,其中以哌嗪和对氟苯胺为胺供体目标化合物对SMMC-7721细胞的活性高于其他胺供体化合物的活性,其活性与对照阿霉素的活性相当。结论噁二唑硫酮杂环可作为氟喹诺酮C-3羧基的等排体,用曼尼希碱侧链修饰可显著提高其抗肿瘤活性。     

噁唑烷酮类化合物的合成及抗菌活性

目的设计合成(口恶)唑烷酮类化合物,并对其体外抗菌活性进行初步评价.方法 以3,4-二氟硝基苯为原料,经多步反应合成目标化合物;采用微量液体稀释法,检测目标化合物对金黄色葡萄球菌和表皮葡萄球菌的抑制和杀灭作用.结果与结论 合成了10个新化合物,经1H-NMR、MS确证其结构.体外试验表明:化合物7f的体外抗菌活性与对照药物利奈唑酮相当,化合物7a、8c和8d表现出一定的抗菌活性.     

Synthesis, antitumor activity and molecular docking study of novel benzofuran-2-yl pyrazole pyrimidine derivatives

A new series of (benzofuran-2-yl)-1-phenyl-1H-pyrazol-4-yl) pyrimidine derivatives were synthesized from 3-(benzofuran-2-yl)-1-phenyl-1H-pyrazol-4-carbaldehyde (1) through different routes of cyclocondensation reactions. Condensation of 1 with active methylene compounds afforded compounds 2-8. The cyclization of 2 with chloroacetic acid, ortho substituted benzoic acid and/or ethanolamine gave compounds 9-12. Also condensation of 2 with hydrazine hydrate followed by cyclocondensation afforded corresponding triazines and pyrazole derivatives 18-27. Some docking studies of the newly prepared compounds as thymidylate synthase inhibitors have been done. Also the cytotoxic activity of some of the prepared compounds as a representative examples was evaluated against HEPG2 (human liver carcinoma cell line) in comparison with 5-fluorouracil (5-Fu).     

Design,synthesis, and docking study of new quinoline derivatives as antitumor agents

New quinolines substituted with various heterocycles and chalcone moieties were synthesized and evaluated as antitumor agents. All the synthesized compounds were in vitro screened against 60 human cancer cell lines. Compound 13 showed the highest cytotoxicity toward 58 cell lines, exhibiting distinct growth inhibition values (GI₅₀) against the majority of them, including SR, HL‐60 (TB) strains (leukemia), and MDA‐MB‐435 strains (melanoma), with GI₅₀ values of 0.232, 0.260, and 0.300 µM, respectively. It exhibited great selectivity toward cancer cell lines, with less toxic effect against normal cells represented by skin fibroblast (BJ) and breast epithelial cell lines (MCF‐10F). The enzyme inhibitory activity of compound 13 was evaluated against topoisomerase 1 (Topo 1), epidermal growth factor receptor and vascular endothelial growth factor receptor 2, where it displayed worthy Topo 1 inhibition activity with an IC₅₀ value of 0.278 µM compared with camptothecin as a reference drug (IC₅₀ 0.224 µM). Docking studies were performed to investigate the recognition profile of compound 13 with the Topo 1 enzyme binding site.     

沙利度胺衍生物的设计合成及其抗肿瘤活性研究

目的设计合成1，3-二氢-1，3-二氧代．2H-异吲哚-N-取代沙利度胺衍生物。并对其进行体外抗肿瘤活性测试。方法以2．氨基-β-D-吡喃葡萄糖盐酸盐为原料，经过6步反应得到化合物N-（3’，4’，6＇-三乙酰-1’-溴代吡喃葡萄糖）-1,3-二氢-1，3-二氧代-2H-异吲哚，该化合物经过溴代、取代反应得到目标化合物。通过对4T1细胞存活率的测试测定20个目标化合物体外抗肿瘤活性。结果设计合成的20个目标化合物均未见文献报道。所有化合物均经过1H-NMR谱确证，部分化合物经IR、MS谱确证。结论所有目标化合物对4T1细胞均具有-定的抑制生长作用。表明所合成的沙利度胺衍生物均有-定的抗肿瘤活性。     

Benzimidazole derivatives: synthesis, leishmanicidal effectiveness, and molecular docking studies

Leishmanolysin GP63 is a zinc metalloprotease, expressed at the surface of Leishmania promastigotes. Studies on this protein are hindered as only a limited number of effective non-toxic inhibitors of this drug target are known. Present study describes the identification of a variety of 2-aryl- and 5-nitro-2-arylbenzimidazoles as new GP63 inhibitors. All the compounds were tested for in vitro activity against the promastigote form of Leishmania major and showed very good activity. 2-(Thiophen-2-yl)-1H-benzimidazole (19) and 2-(1H-indol-3-yl)-5-nitro-1H-benzimidazole (34) with IC₅₀ value of 0.62 μg/mL were identified as lead of this library. Molecular docking studies were performed on binding site of GP63 to study the binding mode of compounds. The results of both in vitro and in silico studies clearly indicated that benzimidazoles may serve as new drug candidates in the combat against leishmaniasis.     

取代苯基亚甲基环戊酮衍生物的设计、合成与抗肿瘤活性

目的 设计并合成一系列取代苯基亚甲基环戊酮衍生物,对它们的体外抗肿瘤活性进行初步筛选并探讨其构效关系。方法 使用化学方法对目标化合物进行合成,采用MTT法测定目标化合物的体外抗肿瘤活性,利用CoMFA法讨论构效关系。结果与结论 合成了23个目标化合物,其中22个未见文献报道,目标化合物的结构经元素分析、¹H-NMR和MS谱确认。体外抗肿瘤活性初筛结果显示,化合物Ⅰa和Ⅰb对Bel-7402、HCT-8、A-549 肿瘤细胞均表现出较高的细胞毒性,化合物Ⅱg对Bel-7402和HCT-8呈现选择性抑制,但对A-549无抑制作用,化合物 Ⅲa~Ⅲf 对3种肿瘤细胞均无明显抑制作用。CoMFA 结果显示,5位芳基胺甲基结构中,胺基的对位含有空间位阻较小和吸电子基团时将有助于提高化合物的活性,而胺基的邻位和间位连有空间位阻较大和供电子基团将会增强化合物的活性。     

Design,synthesis, and antitumor activity of oleanolic acid derivatives

Using the techniques of computer-aided drug design, the docking of survivin and known active small molecules was simulated and then the key amino acid residue fragments of the target protein were analyzed. It led to the discovery of active groups capable of binding to the critical sites. Through the use of the natural product, oleanolic acid, as a lead compound, the introduction of the active groups onto the A-ring, and the modification of the carboxyl group at the C-28 position using esterification or amidation, 20 new oleanolic acid derivatives had been designed and synthesized. HepG2 and SGC-7901 cells were used to screen the antitumor activity through the standard MTT method. The compounds, II₃, III₅ and IV_4, exhibited more potent cytotoxicity than positive drugs. Western blot experiment demonstrated that compound II₃ can effectively inhibit the proliferation of HepG2 cells.     

Design,synthesis, molecular docking,and anticancer activity of benzoxazole derivatives as VEGFR‐2 inhibitors

Novel series of benzoxazole s 4 _a‐f ‐16 were designed, synthesized, and evaluated for anticancer activity against HepG2, HCT‐116, and MCF‐7 cells. HCT‐116 was the most sensitive cell line to the influence of the new derivatives. In particular, compound 5 _e was found to be the most potent against HepG2, HCT‐116, and MCF‐7 with IC₅₀ = 4.13 ± 0.2, 6.93 ± 0.3, and 8.67 ± 0.5 µM, respectively. Compounds 5 _c , 5 _f , 6 _b , 5 _d , and 6 _c showed the highest anticancer activities against HepG2 cells with IC₅₀ of 5.93 ± 0.2, 6.58 ± 0.4, 8.10 ± 0.7, 8.75 ± 0.7, and 9.95 ± 0.9 µM, respectively; HCT‐116 cells with IC₅₀ of 7.14 ± 0.4, 9.10 ± 0.8, 7.91 ± 0.6, 9.52 ± 0.5, and 12.48 ± 1.1 µM, respectively; and MCF‐7 cells with IC₅₀ of 8.93 ± 0.6, 10.11 ± 0.9, 12.31 ± 1.0, 9.95 ± 0.8, and 15.70 ± 1.4 µM, respectively, compared with sorafenib as a reference drug with IC₅₀ of 9.18 ± 0.6, 5.47 ± 0.3, and 7.26 ± 0.3 µM, respectively. The most active compounds 5 _c‐f and 6 _b,c were further evaluated for their vascular endothelial growth factor receptor‐2 (VEGFR‐2) inhibition. Compounds 5 _e and 5 _c potently inhibited VEGFR‐2 at lower IC₅₀ values of 0.07 ± 0.01 and 0.08 ± 0.01 µM, respectively, compared with sorafenib (IC₅₀ = 0.1 ± 0.02 µM). Compound 5 _f potently inhibited VEGFR‐2 at low IC₅₀ value (0.10 ± 0.02 µM) equipotent to sorafenib. Our design was based on the essential pharmacophoric features of the VEGFR‐2 inhibitor sorafenib. Molecular docking was performed for all compounds to assess their binding pattern and affinity toward the VEGFR‐2 active site.     

基于网络药理学和分子对接探讨淫羊藿抗肿瘤作用机制

目的 通过网络药理学和分子对接方法探讨淫羊藿抗肿瘤的作用机制。方法 利用TCMSP数据库获取淫羊藿的活性成分以及相对应的靶点,利用Genecards、OMIM数据库获取疾病靶点,绘制药物-疾病韦恩图,获得其共同靶点;利用 Cytoscape 3.8.2 软件构建“淫羊藿活性成分-疾病靶点”网络可视化关系图;利用STRING数据库和Cytoscape 3.8.2 软件构建蛋白相互作用网络,并进行网络拓扑分析;利用R x64 4.0.5软件,对相关靶点进行GO和KEGG富集分析,了解淫羊藿抗肿瘤可能的生物过程及其通路;最后利用SYBYL 2.0软件分子对接进行半柔性对接反向验证。结果 筛选出淫羊藿活性成分23个,靶点193个;疾病相关靶点8 169个,活性成分与疾病两者共同靶点173个;蛋白互作网络显示TP53、AKT1、JUN、CASP3等靶点基因在淫羊藿抗肿瘤的生物网络中起重要作用;潜在作用靶点涉及2 592条生物学功能、176条通路。分子对接结果显示淫羊藿活性化合物与多个疾病关键靶点具有较高结合能力,对接评分较高的为淫羊藿苷与CASP3靶点蛋白。结论 淫羊藿抗肿瘤具有多靶点和多通路的潜在作用机制,为其进一步研究提供参考。     

吲哚脲类化合物的设计合成及其体外抗肿瘤活性研究

目的以索拉非尼为先导物,设计并合成一系列吲哚脲类化合物,并对其体外抗肿瘤活性进行初步评价。方法以5-硝基吲哚-2-甲酸为起始原料,采用BOP法合成酰胺,再将硝基还原成胺基,最后与异氰酸酯缩合,共3步反应制备目标化合物;采用MTT法评价目标化合物对4种肿瘤细胞株(MX-1、A375、HepG2、Ketr3)的生长抑制作用。结果与结论合成了28个吲哚脲类新化合物,其结构经1H-NMR和HR-MS确证。体外活性结果表明,与索拉非尼相比多数化合物选择性地作用于MX-1细胞株,显示出较强的抑制肿瘤细胞增殖的活性。其中含甲基哌啶的化合物26、30和31抑制MX-1和A375细胞生长的作用显著强于索拉非尼。尤其是化合物31抑制A375细胞增殖的作用是索拉非尼的10倍,对HepG2的抑制活性与索拉非尼相当,IC50值均达到微摩尔级水平,值得进一步研究。