氟喹诺酮C3杂环取代衍生物的合成及抗肿瘤活性研究(Ⅰ):环丙沙星噻二唑希夫碱

为发现氟喹诺酮类抗肿瘤先导化合物,用氨基噻二唑杂环替代环丙沙星(1)C3羧基形成环丙氟喹诺酮氨基噻二唑(2)骨架,然后与芳香醛缩合得到相应的希夫碱目标化合物(3a～3j).新化合物的结构经元素分析和光谱数据表征,并用MTT法评价了它们体外对SMMC-7721、HL60和L1210 3种癌细胞株的生长抑制活性.结果表明,所合成的11个新化合物均具有潜在的体外细胞毒活性,其中目标化合物3d和3f的IC50值达到微摩尔浓度数量级.这表明,氟喹诺酮类抗菌剂的3位羧基不是抗肿瘤活性所必需的,而被功能化修饰的杂环取代衍生物作为新结构抗肿瘤先导物具有进一步研究和开发的价值.     

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。     

恩诺沙星C-3上1,2,4-三唑硫基乙酰腙类化合物的合成及抗肿瘤活性

目的基于氟喹诺酮的作用机制和结构特征设计抗肿瘤氟喹诺酮化合物。方法 1,2,4-三唑杂环作为恩诺沙星C-3上羧基的电子等排体,硫基乙酰腙作为功能修饰侧链,设计合成了新的1,2,4-三唑硫基乙酰腙类氟喹诺酮C-3衍生物(7a-7l),其结构经元素分析和光谱数据确证,用M TT[3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide]方法评价了体外对SMMC-7721、L1210和HL60共3种癌细胞的抗增殖活性。结果合成了12个新目标物,对3种癌细胞抗肿瘤活性强于母体恩诺沙星。构效关系表明,2-羟基苯环基或吸电子基取代苯基类化合物的活性强于其他取代基的化合物,其中对SMMC-7721细胞的活性与对照阿霉素相当。结论硫基乙酰腙功能基修饰的1,2,4-三唑杂环替代氟喹诺酮C-3上羧基有利于提高抗肿瘤活性。     

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。     

恩诺沙星酰腙的合成及抗肿瘤活性

目的寻找转化抗菌氟喹诺酮到抗肿瘤氟喹诺酮的有效策略。方法用酰腙作为恩诺沙星1C3羧基的生物电子等排体,合成了12个新的恩诺沙星酰腙(3a-3l)目标化合物,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。结果酰腙目标物对3种实验癌细胞的生长抑制活性显著强于母体化合物1,苯环带吸电子化合物的活性强于供电子化合物的活性,尤其对肝癌SMMC-7721细胞的活性明显高于对白血病细胞L1210和HL60的活性。结论氟喹诺酮羧基并非是抗肿瘤活性所必需的药效团,其被酰腙取代可显著提高其抗肿瘤活性。     

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。     

3-(4-哌嗪-1-苯基)-6-取代-s-三唑并［3,4-b］［1,3,4］噻二唑盐酸盐的合成及抗菌活性

为了研究水溶性稠杂环化合物的合成方法及抗菌活性，本研究采用3-(4-氯苯基)-6-取代-s-三唑并［3,4-b］［1,3,4］噻二唑(2a～n)在相转移催化剂TBAI作用下与哌嗪发生亲核取代，再与盐酸成盐制备了3-(4-哌嗪-1-苯基)-6-取代-s-三唑［3,4-b］［1,3,4］噻二唑盐酸盐(3a～n)。用试管二倍稀释法研究了新化合物的体外抗菌活性。结果表明，合成的28个新化合物极性碱性哌嗪基的引入可提高化合物的抗菌活性。该类稠杂环化合物的结构有待进一步优化。     

咪唑并［2,1-b］［1,3,4］噻二唑及杂环氨曼尼希碱盐酸盐的合成及抗菌活性

为了进一步优化由噻二唑核稠合的水溶性稠杂环化合物的合成方法及抗菌活性，本文用2-(4-甲氧苯基)-5-氨基-1,3,4-噻二唑(2)与α-氯代-4-氯苯乙酮(3)缩合得6-(4-氯苯基)-2-(4-甲氧苯基)-咪唑并［2,1-b］［1,3,4］噻二唑(4)，4与取代哌嗪发生亲核取代反应得到6-(4-取代哌嗪-1-苯基)-2-(4-甲氧苯基)-咪唑并［2,1-b］-［1,3,4］噻二唑(5)，5与杂环氨进行曼尼希反应并与盐酸成盐得目标化合物6-(4-取代哌嗪-1-苯基)-2-(4-甲氧苯基)-5-杂环氨基甲基-咪唑并［2,1-b］［1,3,4］噻二唑盐酸盐(1)。用试管二倍稀释法评价了15个新化合物的体外抗菌活性，结果表明，随着极性基团的引入，抗菌活性显著提高，提示该类化合物的结构修饰值得进一步研究。     

1,4-二［3-(氨基硫代甲酰硫基)丙酰基］哌嗪类化合物的合成及其抗肿瘤活性

目的　寻找并合成低毒、有较强抗肿瘤活性的哌嗪类化合物。方法和结果　以1,4-二(3-溴丙酰基)哌嗪为先导物,合成了一系列1,4-二［3-(氨基硫代甲酰硫基)丙酰基］哌嗪类新化合物,并测试了这些化合物(4a-j)对8种瘤细胞株的体外抗肿瘤活性。结论　体外抗肿瘤活性试验结果表明,大多数化合物显示一定的抗肿瘤活性,尤其是化合物4c,4d和4e,浓度在10μmol.L^-1时,对HL-60细胞抑制率分别为44%,90%和70%。     

2-(3-吡啶)-5-{［(5-芳基-1,3,4-二唑-2-基)亚甲基］硫代}-1,3,4-二唑的合成及抗菌活性

目的研究多杂环化合物的合成方法和抗菌活性。方法用［(5-吡啶-3-基-1,3,4-二唑-2-基)硫代］乙酸与相应的芳酰肼缩合,得到相应的目标化合物。用试管稀释法,研究目标化合物的体外抑菌活性。结果合成了16个新化合物,其结构经MS,IR,₁HNMR和元素分析确证。其中多数化合物在体外表现出较好的抑菌活性。结论 含吡啶的双二唑杂环化合物有可能成为新型结构的抗菌药物。     

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。     

Design,synthesis and antitumor activity of C3/C3 bis-fluoroquonolones cross-linked with [1,2,4]triazolo[3,4-b] [1,3,4]thiadiazole

To contribute to the development of an efficient method for the conversion of antibacterial fluoroquinolones to antitumor fluoroquinolones, a series of C3/C3 bis-fluoroquinolone fused heterocycles cross-linked with a [1,2,4]-triazolo[3,4-b] [1,3,4]-thiadiazole core as a common bioisostere of two carboxylic acid groups was designed and synthesized as their hydrochloride salts. Structures were characterized by elemental analysis and spectral data and their in vitro antitumor activity against L1210, CHO and HL60 cell lines was screened by determination of their IC₅₀ values in the methylthiazole trazolium (MTT) assay. Two compounds were highly potent against the HL60 cell line and represent promising lead compounds for future development.     

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。     

Synthesis of Novel Heterocyclic Ring‐Fused 18β‐Glycyrrhetinic Acid Derivatives with Antitumor and Antimetastatic Activity

Glycyrrhetinic acid (GA) is one of the most important triterpenoic acids shows many pharmacological effects, especially antitumor activity. GA triggers apoptosis in various tumor cell lines. However, the antitumor activity of GA is weak, thus the synthesis of new synthetic analogs with enhanced potency is needed. By introducing various five‐member fused heterocyclic rings at C‐2 and C‐3 positions, 18 novel GA derivatives were obtained. These compounds were evaluated for their inhibitory activity against the growth of eight different tumor cell lines using a SRB assay. The most active compound 37 showed IC₅₀ between 5.19 and 11.72 μm , which was about 11‐fold more potent than the lead compound GA. An apoptotic effect of GA and 37 was determined using flow cytometry and trypan blue exclusion assays. We also demonstrated here for the first time that GA and the synthetic derivatives exhibited inhibitory effect on migration of the tested tumor cells, especially 37 which was about 20‐fold more potent than GA on antimetastatic activity.     

N,N-双取代脲类克鲁斯氏锥体虫半胱氨酸蛋白酶小分子抑制剂的合成及其活性研究

目的寻找克鲁斯氏锥体虫体半胱氨酸蛋白酶Cruzain的小分子抑制剂.方法根据时Cruzain分子结构的计算机模拟设计结果,选用N,N-双取代脲为先导结构,目标化合物的合成采用Curtius重排反应,测定了化合物的体外抑制Cruzain的IC50值.结果设计并合成了21个未见文献报道的双取代脲衍生物,确证了它们的化学结构.结论生物活性测定结果显示,所合成的化合物均有不同程度的抑制Cruzain的活性,其中化合物Ⅳ9和Ⅳ17的活性好于对照药tf-175.Ⅳ8的活性与对照药tf-175相当.     

Synthesis and antitumor evaluation of new polysubstituted thiazole and derived thiazolo[4, 5-d]pyrimidine systems

The synthesis of three categories of compounds containing the 1H-pyrazole ring linked to some dihydrothiazoles, thiazolidinones, and thiazolo[4, 5-d]pyrimidines through different linkages is described. Nine of the newly synthesized target compounds were selected by the NCI for in-vitro antitumor screening. Four compounds, namely 4a, 4b, 13, and 14, exhibited a broad spectrum of antitumor activity against most of the tested tumor cell lines. Compound 4a, 3-phenyl-4-amino-5-(3, 5-dimethyl-1-phenyl-1H-pyrazole-4-methylidenehydrazinocarbonyl)thiazole-2(3H)-thione proved to be the most active antitumor agent in the present study with GI(50), TGI, and LC(50) MG-MID values of 3.93, 41.7, and 91.2 microM, respectively. The same compound also exhibited high selectivity towards CNS SNB-75 and Ovarian IGROV1 cancer cell lines at both the GI(50) and TGI levels. Compound 4b, 3-(4-chlorophenyl)-4-amino-5-(3, 5-dimethyl-1-phenyl-1H-pyrazole-4-methylidenehydra-zinocarbonyl) thiazole-2(3H)-thione showed nearly the same pattern of activity as 4a but to a lesser extent. Compounds 13 and 14 displayed moderate antitumor activity against most of the tested tumor cell lines with GI(50) MG-MID values range of 20.4-80.6 microM and TGI MG-MID values of 55.5-95.5 microM.     

Synthesis of some (E)-6-[2-(furan-2-yl)ethenyl]-1,2,4-triazin-5-ones and their biological evaluation as antitumor agents

The synthesis of some new (E)-6-[2-(furan-2-yl)ethenyl]-1,2,4-triazin-5-ones directly linked to either pyrazole, pyrazoline, pyrazolidine counterparts, or to substituted thio and hydrazono functionalities is described. Six of the newly synthesized compounds were selected by the National Cancer Institute (NCI) to be evaluated for their in vitro antitumor activity according to the protocol of the NCI in vitro disease-oriented human cells screening panel assay. The results revealed that the pyrazole derivative 5c was found to be the most active member in this screen as evidenced by its ability to exert potential growth inhibitory activity against most of the tested subpanel tumor cell lines with selective influence on leukemia subpanel tumor cell lines (GI₅₀ values 2.01–3.03 μM). Moreover, a comparative study for log GI₅₀ values of both compound 5c and 5-fluorouracil (5-FU) revealed that compound 5c showed higher potency than 5-FU against most of the tested subpanel tumor cell lines. Thus compound 5c could be considered as a suitable lead towards the design of broad spectrum antitumor active agents targeting various human tumor cell lines.     

含羧酸侧链蒽醛缩氨基均三唑席夫碱衍生物的合成及抗肿瘤活性

为发现可用于抗肿瘤活性研究的新结构杂环胺席夫碱先导化合物， 本文用氨基均三唑硫代乙酸(2)与9-蒽醛缩合得 4-(9-蒽亚甲氨基)-5-苯基-均-三唑-3-硫乙酸席夫碱目标化物(3a～j)。用MTT方法评价了新化合物体外抗肿瘤活性。结果表明，目标化合物对CHO、 HL60和L1210三种癌细胞株均有不同程度的细胞毒活性，具有进一步研究的价值。     

N-甲基-4-苯氧基吡啶-2-甲酰胺衍生物的合成及其抗肿瘤活性研究

目的设计并合成结构新颖的N-甲基-4-苯氧基吡啶-2-甲酰胺衍生物,并对其抗肿瘤活性进行初步评价。方法通过分析索拉菲尼与B-Raf激酶的共结晶模型,在保留其药效团的基础上,设计了16个目标化合物,以吡啶甲酸为原料,经氯代、酯化、取代、还原、氨解及与取代的氨基甲酸苯酯反应制得9个目标化合物;经氯代、氨解、取代及与取代的氨基甲酸苯酯反应得到7个目标化合物;以索拉菲尼为阳性对照,采用MTT法,评价目标化合物对人肺癌细胞株H460、人结肠癌细胞株HT-29和人胃癌细胞株MKN-45增殖的抑制活性。结果与结论部分目标化合物显示出较好的抗肿瘤活性,活性优于或与索拉菲尼相当,其中化合物9b和12f的活性突出。初步构效关系研究表明,末端苯环上取代基的电性效应和取代位置对化合物的活性具有显著影响。     

Synthesis and cytotoxic effects of deoxy-tomentellin

Cannabigerol (1, CBG), methyl 4-[(2E)-3,7-dimethyl-2,6-octadienyl)oxy]-3-methoxybenzoate (2, DTM), 5-fluorouracil (3, FU) as a reference, and cannabidiol (4, CBD) were tested for their growth inhibitory effects against KB(ATCC NO, OCL 17) cell lines using two different assays, the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazoliumbromide (MTT) assay and the sulforhod-amine B protein (SRB) assay. These compounds showed inhibitory activity in vitro in the micromolar range against KB cell lines. In general, the antitumor activities of these compounds (1, 2, 3 and 4) were dose-dependent over the micromolar concentration range of 1 to 100 M. The comparison of IC50 values of these compounds in tumor cell lines showed that their susceptibility to these compounds decreases in the following order: DTM > CBD > 5-FU > CBG by MTT assay and DTM = CBD > 5-FU > CBG by SRB assay. CBG 1, DTM 2, 5-FU 3, and CBD 4 were tested for their cytotoxic effects on NIH 3T3 fibroblasts using two different assays, the MTT assay and SRB assay. These compounds exhibited potent cytotoxic activities in vitro in the micromolar range against NIH 3T3 fibroblasts. In general, the cytotoxic activities of these compounds (1, 2, 3 and 4) were dose-dependent over the micromolar concentration range of 1 to 100 M. The comparison of CD50 values of these compounds in NIH 3T3 fibroblasts shows that their susceptibility to these compounds in decreases the following order(:) CBD > 5-FU > DTM > CBG by MTT assay, CBD > 5-FU > CBG > DTM by SRB assay. These results suggest that DTM 2 has the most growth-inhibitory activity against KB cell lines.