3-取代2-吲哚酮类化合物的合成与抗肿瘤活性研究

目的寻找新的具有血管内皮细胞生长因子受体酪氨酸激酶抑制活性的3-取代2-吲哚酮类化合物。方法以2-吲哚酮为原料，利用缩合反应合成目标化合物，并进行体外初步药效学评价。结果设计并合成了5种化合物，其中4种为首次发现，体外初步药效学研究表明，所合成的化合物均具有抑制S-180肿瘤细胞生长的活性，其中化合物Ⅱ活性最强。结论3-取代2-吲哚酮类化合物具有抑制S-180肿瘤细胞生长的活性，化合物中吲哚环平面与相应的芳环平面之间处于垂直状态时活性较强。     

4(3H)-喹唑啉酮衍生物的合成及体外抗肿瘤活性

将6-溴甲基-2-甲基-4(3H)-喹唑啉酮在无水磷酸钾存在下与二硫化碳以及不同的胺反应，合成了一系列具有二硫代氨基甲酸酯侧链的4(3H)-喹唑啉酮衍生物，其结构经ESI-MS，¹H NMR，元素分析或HRMS所证实。采用MTT法测定了目标化合物8a~8q对人慢性髓性白血病K562细胞和人宫颈癌Hela细胞的体外抗肿瘤活性，结果表明化合物8q对K562和Hela细胞的体外生长具有显著的抑制作用，IC₅₀值分别为0.5和12.0 μmol·L^-1，因而可作为抗肿瘤药物研究的先导化合物。     

3-取代吲哚酮类化合物的合成及抗肿瘤活性

目的设计合成具有抗肿瘤活性的3-取代吲哚-2-酮类化合物,并对其抗肿瘤活性进行评价.方法以吲哚酮和苯甲醛衍生物在微波辐射条件下进行缩合反应制得目标化合物,用人肝癌HepG2细胞进行抗肿瘤活性检测.结果合成了8个化合物,其中6个未见报道.其结构均经1H-NMR、IR及ESI-MS确证.结论初步抗肿瘤活性测试结果显示化合物Ⅱe、Ⅱg有较强的活性(IC50值分别为1.4μmol·L-1和1.2μmol·L-1,小于阳性对照药5-Fu).微波辐射技术用于3-取代吲哚酮的合成,能大幅度缩短反应时间,提高收率.     

7-甲氧基-4-(2-甲基-4-喹唑啉基)-3,4-二氢喹噁啉-2(1H)-酮的合成工艺改进

目的:改进7-甲氧基-4-(2-甲基-4-喹唑啉基)-3,4-二氢喹噁啉-2(1H)-酮的合成工艺。方法:以2-甲基-4(3H)-喹唑啉酮为起始原料,通过氯代、亲核取代、二芳胺烷基化和硝基还原环合等反应对7-甲氧基-4-(2-甲基-4-喹唑啉基)-3,4-二氢喹噁啉-2(1H)-酮的合成工艺进行改进,并考察其收率。结果:7-甲氧基-4-(2-甲基-4-喹唑啉基)-3,4-二氢喹噁啉-2(1H)-酮的结构经核磁共振氢谱和电喷雾质谱确证,总收率为43.5%,较改进前的20.2%提高了23.3%。结论:改进后的工艺更简单,条件更温和,适合实验室研究的批量制备。     

3-取代吲哚-2-酮类化合物的设计、合成及抗肿瘤活性研究

目的设计合成对微管蛋白和血管内皮细胞生长因子受体2(VEGFR-2)激酶具有双重抑制作用的3-取代吲哚-2-酮类化合物,考察其体外抑瘤活性。方法以取代的苯胺为起始原料,经缩合、环合、还原、取代等反应制得系列目标化合物,并考察该系列化合物对微管蛋白和肿瘤细胞的抑制活性。结果共合成了11个新的目标化合物。实验结果显示,化合物j9对微管蛋白和VEGFR-2激酶具有双重抑制活性。所有目标化合物对3种肿瘤细胞株均有中等强度的抑制活性。结论该类化合物是一类具有多靶点作用的抗肿瘤化合物。     

3-芳香Shiff碱-5-氟吲哚-2酮衍生物的设计、合成与活性研究

在5-氟吲哚-2-酮的母体结构基础上,选用13个已上市或处于临床研究阶段的多靶点酪氨酸激酶抑制剂的结构片段,设计合成了11个3-芳香Shiff碱吲哚-2-酮衍生物。11个目标化合物的结构经1H NMR、MS及元素分析确证。采用MTT法测试所合成化合物的体外抗肿瘤活性,结果表明,大多数化合物具有一定的抗癌作用,其中化合物1b、1g、1i及1h的抗癌活性优于或相当于阳性对照。     

3-取代-5-氟-1-2-二氢-3H-吲哚-2-酮类化合物的合成及抗肿瘤活性

5-溴-1H-吲哚经氰基取代、Vilsmeier-Haack反应、水解、缩合制得3-[(Z)-(5-氟-1,2-二氢-2-氧代-3H-亚吲哚基)甲基]-1H-吲哚-5-甲酸,再和相应的胺类化合物反应制得10个3-取代-5-氟-1,2-二氢-3H-吲哚-2-酮类化合物.以舒尼替尼为阳性对照,用MTT法测试目标化合物对人乳腺上皮细胞HMEC的体外抑制活性,其中1c、1f、1g和1h在浓度为10 μmol/L时,对HMEC的抑制活性优丁舒尼替尼.进一步测试1c和1e对SGC7901、A549、HL-60、SK-BR-3、HCT116肿瘤细胞株的抗增殖活性.结果表明,1c和1e对白血病细胞株HL-60的抗增殖活性优丁舒尼替尼.     

2-(4-氯-3-甲基苯基)-1,2,4-三嗪-3,5(2H,4H)-二酮的合成

对硝基邻甲苯胺经重氮化、氯代、还原、闭环、水解、脱羧6步反应得到2-（4-氯-3-甲基苯基）-1,2,4-三嗪-3,5（2H,4H）-二酮,总收率约40%。     

3-吲哚甲醇的抗肿瘤作用

目的 探讨硫代葡萄糖苷的降解产物3-吲哚甲醇(IC)在体内、外的抗癌活性,为十字花科蔬菜的防癌作用以及从蔬菜中筛选药用成分提供理论依据.方法 体内试验以荷瘤小鼠实体瘤重、抑瘤率及对脾脏、胸腺指数的影响为指标,评价IC对S180移植性肉瘤的抑制作用;长期实验在饮水中加入化学致癌剂甲硝基亚硝基胍(MNNG),诱发小鼠前胃鳞癌及癌前病变,同时给予不同剂量IC进行预防,观察癌前病变和癌变发生率;体外采用MTT法,观察IC对HeLa细胞增殖的抑制作用.结果 IC在体内能明显抑制实体瘤重,使荷瘤小鼠的脾脏和胸腺指数下降,表现出一定的免疫抑制作用;长期试验能明显降低MNNG诱发的癌前病变和癌变发生率;在体外对HeLa细胞有明显的生长抑制作用,且作用随药物浓度增加而加大.结论 IC具有一定的抗肿瘤活性.     

6-甲氧基-7-[(1-甲基-4-哌啶)甲氧基]-4(3H)-喹唑啉酮的合成工艺研究

目的 对6-甲氧基-7-[(1-甲基-4-哌啶)甲氧基]-4(3H)-喹唑啉酮的合成工艺进行研究.方法 以1-叔丁氧羰基-4-对甲苯磺酰氧甲基哌啶和香草酸甲酯为起始原料,经过脱叔丁氧羰基、甲基化、硝化、还原,最后经Niementowski环合得到.结果 实验总收率约为56％.结论 优化的新工艺减少了反应步骤、降低了制备成本、简化了反应操作条件、提高了产率,更适合工业化生产.     

Synthesis and cytotoxic properties of novel (E)-3-benzylidene-7-methoxychroman-4-one derivatives

Background and the purpose of the study

There has been increscent interest in the field of cancer chemotherapy by discovery and development of novel agents with high efficacy, low toxicity, and minimum side effects. In order to find new anticancer agents, we replaced the pyrazolone part of well-known cytotoxic agent SJ-172550 with 7-methoxychroman-4-one. Thus, a novel series of 3-benzylidene-4-chromanones were synthesized and tested in vitro against human cancer cell lines.

Methods

The title compounds were prepared by condensation of 7-methoxychroman-4-one with suitable aldehydes in appropriate alcohol in the presence of gaseous HCl. The antiproliferative activity of target compounds were evaluated against MDA-MB-231 (breast cancer), KB (nasopharyngeal epidermoid carcinoma) and SK-N-MC (human neuroblastoma) cell lines using MTT assay.

Results

Although the direct analog of SJ-172550 (compound 5d) did not show any cytotoxic activity against tested cell lines, but 2-(2-chloro-6-methoxyphenoxy)acetic acid methyl ester analog 5c showed some activity against MDA-MB-231 and SK-N-MC cells. Further modification of compound 5c resulted in the 3-chloro-4,5-dimethoxybenzylidene derivative 5b which demonstrated better cytotoxic profile against all tested cell lines (IC₅₀ values = 7.56–25.04 μg/ml).

Conclusion

The results demonstrated that the cytotoxic activity of compound 5b against MDA-MB-231 and SK-N-MC cells is more than etoposide. Therefore, compound 5b prototype could be considered as novel cytotoxic agent for further developing new anticancer chemotherapeutics.     

Synthesis and Antimicrobial Activity of Some New Quinazolin-4(3H)-one Derivatives

A new series of 6-iodo-2-phenylquinazolin-4(3H)-one derivatives was prepared and screened for antimicrobial activity. The thioureide derivatives 4–6, the carbohydrazide derivatives 19–21 and 24 displayed excellent broad-spectrum antimicrobial activity. Some compounds showed moderate activity against Candida albicans and Pseudomonas aeruginosa. None of the tested compounds was as active as the reference standard drugs ampicillin and clotrimazole. The detailed synthesis, antimicrobial activity, and the minimum inhibitory concentrations (MIC) are reported.     

Synthesis and antimicrobial activity of 3-(1,3,4-Oxadiazol-2-yl)quinazolin-4(3H)-ones

In attempt to find new pharmacologically active molecules, we report here the synthesis and in vitro antimicrobial activity of various 3-(1,3,4-oxadiazol-2-yl)-quinazolin-4(3H)-ones. The antimicrobial activity of title compounds were examined against two gram positive bacteria (S. aureus, S. pyogenes), two gram negative bacteria (E. coli, P. aeruginosa) and three fungi (C. albicans, A. niger, A. clavatus) using the broth microdilution method. Some derivatives bearing a bromo or iodo group exhibited very good antimicrobial activity.     

2，3-二氢喹啉-4（1H）-酮缩氨基脲类化合物的设计、合成及抗真菌活性研究

目的合成一系列二氯-2,3-二氢喹啉4（1H）-酮缩氨基脲类化合物并测定其体外抗真菌活性。方法以二氯苯胺和丙烯酸为起始原料,经加成、环合制得中间体5,7-二氯-2,3-二氢喹啉-4（1H）-酮和6,8-二氯-2,3-二氨喹啉-4（1H）-酮;中间体与各种胪-取代的氨基脲缩合得到目标化合物;采用二倍浓度稀释法测试各目标化合物的体外抗真菌活性,实验选用9种临床上常见的致病真菌为测试菌株,以氟康唑为阳性对照药。结果与结论合成的24个化合物均未见文献报道,其结构经。H-NMR、Ms谱确证;活性测试结果表明,多个目标化合物对测试真菌表现出较好的体外抑菌活性。     

Synthesis and cytotoxicity testing of novel 2-(3-substituted-6-chloro-1,1-dioxo-1,4,2-benzodithiazin-7-yl)-3-phenyl-4(3H)-quinazolinones

A new series of thirteen 2-[3-(substituted amino)-6-chloro-1,1-dioxo-1,4,2-benzodithiazin-7-yl]-3-phenyl-4(3H)-quinazolinones 4-16 were prepared in order to evaluate their cytotoxic activity against 12 human cancer cell lines. The bioassay indicated that the quinazolinone derivatives 5, 8-12, 15, and 16 possess cancer-cell growth-inhibitory properties. Compounds 5 and 12 showed a high level of selectivity for certain cell lines. The most active compounds 9, 10, 15, and 16 showed moderate antiproliferative activity and were approximately 4-fold less potent than cisplatin.     

Synthesis and microbial evaluation of novel N(1)-Arilidene-N(2)-t(3)-methyl-r(2),c(6)-diaryl-piperidin-4-one azine derivatives

Some novel N(1)-arylidene-N(2)-t(3)-methyl-r(2),c(6)-diarylpiperidin-4-one azine derivatives were synthesized and their antibacterial activity against Streptococcus faecalis, Bacillus subtilis, Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus and antifungal activity against Candida-6, Candida-51, Aspergillus niger, and Aspergillus flavus evaluated.     

Structure-based design and synthesis of 5-benzyl-2-phenylpyrimidin-4(3H)-one derivatives as novel MEK1 inhibitors

Previous studies have shown that Ras/Raf/MEK/ERK signaling pathway is up-regulated in almost all cancer cells. Blocking of this pathway by MEK inhibition is an efficient therapeutic approach of cancer. In the present study, we described the discovery of 5-benzyl-2-phenylpyrimidin-4(3H)-one as a novel skeleton of allosteric MEK inhibitor. All acquired target compounds exhibited modest potency to inhibit MEK1 in Raf-MEK cascading assay, and docking studies revealed that the binding mode of the most potent compound (SJ3) was very similar to that of the well known diarylamine-based inhibitor (PD0325901). The results provided valuable guidance for further optimizations on this novel scaffold to achieve druggable molecules.     

3,4-二氢喹啉-2(1H)-酮衍生物的设计合成及抗精神分裂活性研究

目的 设计合成3,4-二氢喹啉-2(1H)-酮类化合物,考察其对D2、5-HT2A、5-HT1A受体的亲和力,并对代表化合物进行体内抗精神分裂活性测试.方法 7-羟基-3,4-二氢喹啉-2(1H)-酮与二卤代烷进行O-烷基化反应,再与相应的哌啶衍生物反应得到目标产物(Ⅰ1～Ⅰ11);对目标化合物进行了D2、5-HT2A...     

5-乙基-2,4-二氢-4-(2-苯氧乙基)-3H-1,2,4-三唑-3-酮的合成

丙酰肼与三光气缩合环化得到5-乙基-1,3,4-噁二唑-2(3H)-酮,继与2-苯氧乙胺反应后在碱性条件下环合得到抗抑郁药奈法唑酮中间体5-乙基-2,4-二氢-4-(2-苯氧乙基)-3H-1,2,4-三唑-3-酮,总收率66.3%.