2-取代-3-氧代羊毛甾烷-24-酰胺类化合物的合成及抗肿瘤活性研究

目的设计合成一系列2-取代-3-氧代羊毛甾烷-24-酰胺类化合物,并考察其体外抗肿瘤活性。方法以羊毛甾醇为起始化合物,对其A环和侧链24位双键进行结构改造,经多步反应合成目标化合物。以阿霉素为阳性对照药,采用MTT法测试目标化合物对PC-3和As PC-1细胞的生长抑制活性。结果与结论设计并合成了18个羊毛甾醇衍生物,结构均经1H-NMR、MS、IR谱确证。药理试验结果表明,目标化合物的抗肿瘤活性较羊毛甾醇均有所提高,其中化合物9b、9g、9h、10d、10f、10g对PC-3细胞表现出显著的生长抑制活性,IC50值小于3μmol·L-1;化合物9d、9e、9f、10d对As PC-1细胞表现出显著的生长抑制活性,IC50值小于3μmol·L-1;化合物10d对PC-3和As PC-1细胞的生长抑制活性与阳性对照药阿霉素相当。初步构效关系研究表明,A环2位氰基取代优于碘代,侧链24位引入哌啶基哌啶、N-甲基哌嗪、3,5-二甲基哌啶活性较好。     

β-榄香烯取代哌嗪酰胺类衍生物的合成及抗肿瘤活性研究

目的设计合成β-榄香烯取代哌嗪酰胺类衍生物并进行体外抗癌活性筛选。方法通过合成β-榄香烯单氯代物,在其结构中引入取代哌嗪结构来合成β-榄香烯取代哌嗪衍生物,然后再与取代苯甲酰氯或取代苯丙烯酰氯反应制得β-榄香烯取代哌嗪酰胺类衍生物。采用MTT法测定了目标化合物对人宫颈癌细胞、人肝癌细胞、人纤维肉瘤细胞等10种细胞的增殖抑制作用。结果与结论合成了23个未见文献报道的β-榄香烯取代哌嗪酰胺类衍生物。经1H—NMR、MS波谱分析确证结构。其中21个化合物经MTT法测定了体外抗肿瘤活性,结果显示活性大多高于β-槛香烯。     

2-氰基-3,12-二氧代齐墩果烷-1,9(11)-二烯-28-酰胺类化合物的合成与抗乳腺癌活性研究

目的设计合成一系列2-氰基-3,12-二氧代齐墩果烷-1,9(11)-二烯-28-酰胺类化合物,以期寻找活性更好的抗肿瘤化合物。方法以2-氰基-3,12-二氧代齐墩果烷-1,9(11)-二烯-28-羧酸(CDDO)为先导化合物,将CDDO的17位羧基通过连接基团与各种氨基化合物进行偶联制得目标化合物;采用MTT法测试偶联物对乳腺癌MDA-MB-468细胞的增殖抑制活性。结果与结论目标化合物的结构经IR、MS及1H-NMR谱确证,合成的10个化合物对乳腺癌MDA-MB-468细胞显示出不同程度的增殖抑制活性,明显优于先导化合物CDDO,其中,化合物2i、2j的活性最强(IC50值分别为1.12、1.37μmol·L-1)。构效关系研究发现,二胺偶联物的活性最好,氨基酸和正丙醇胺偶联物的活性次之,而芳胺偶联物的活性较弱,化合物2i和2j值得进一步研究。     

18β-甘草次酸类衍生物的合成及抑制白血病细胞生长 和诱导细胞凋亡活性研究

目的 对18β-甘草次酸2位、3位、11位和29位进行结构修饰,增强其抑制白血病细胞生长和诱导细胞凋亡活性。方法 以18β-甘草次酸为起始原料,经氧化、酯化、缩合、脱氢等反应得到目标化合物;以台盼蓝排斥试验和AO-EB双荧光染色法检测目标化合物对HL-60细胞的生长抑制活性及诱导细胞凋亡活性。 结果与结论 合成14个18β-甘草次酸类化合物,其结构经核磁共振氢谱、红外光谱及质谱确证。体外活性测定结果表明合成的化合物表现出不同程度的细胞生长抑制活性,其中A环结构改造后的化合物VII和IX活性较强,且呈现时间和剂量依赖性。     

4-苯基-2-氨基嘧啶类化合物的设计合成及其抗肿瘤活性

目的设计合成一系列4-苯基-2-氨基嘧啶类新型化合物,并测定其对前列腺癌细胞(PC-3)的生长抑制活性。方法以硝基苯乙酮为起始原料,通过嘧啶环合、酰胺缩合、硝基还原、氨基保护及脱保护反应合成目标化合物。采用MTT法测试化合物对前列腺癌PC-3细胞的生长抑制活性;采用均相时间分辨荧光法测定化合物对激酶AKT1的抑制活性。结果与结论合成了9个未见文献报道的4-苯基-2-氨基嘧啶类化合物,其结构经1H-NMR、MS谱确证。化合物9a-1、9a-3、9b-1(5μmol·L-1)对激酶AKT1的抑制率大于60%。     

2-(2-取代苯基)噻唑-4-(甲)乙酸类化合物的设计、合成及抗肿瘤活性

目的为了寻找有效的Pin1小分子抑制剂,以2-苯基咪唑-4-甲酸为先导化合物,设计并合成了18个2-(2-取代苯基)噻唑-4-(甲)乙酸类化合物8a-8r。方法以2-甲氧基苯甲酸为起始原料,经8步反应得到目标化合物;利用已建立的酶活性筛选平台测试了目标化合物浓度为10μmol·L~(-1)时对Pin1酶的抑制率;采用MTT法,考察了目标化合物对人前列腺癌PC-3细胞的生长抑制作用。结果与讨论合成了18个未见文献报道的化合物,其结构经~1H-NMR谱和MS谱确证;多数化合物具有Pin1抑制活性,其中化合物8 h的抑制率达到100%;化合物的整体细胞生长抑制作用较弱,化合物8 c和8 g对PC-3细胞具有中等生长抑制作用。     

β-榄香烯醇酯类化合物的合成及抗癌活性研究

目的设计合成β-榄香烯醇酯类化合物，并进行体外抗癌活性筛选。方法采用烯丙位的氯代反应，先合成β-榄香烯氯代物，再与羧酸或氨基酸反应合成目标化合物。用SRB法测定目标化合物对癌细胞的增殖抑制作用。结果共合成10个未见报道的β-榄香烯醇酯类化合物，其结构经红外光谱、核磁共振氢谱和质谱确证。所合成的多个化合物对3种人癌细胞HL-60、HeLa、SGC-7901的IC50值低于β-榄香烯。结论通过在β-榄香烯结构中引入含氮、含氧基团，改善其水溶性，可以提高体外抗癌活性。     

β-榄香烯芳杂环衍生物的合成及体外抗癌活性研究

目的 设计合成β-榄香烯芳杂环衍生物,并进行体外抗癌活性筛选.方法 以β-榄香烯为起始原料,经烯丙位的氯代反应,合成β-榄香烯氯代物,再通过亲核取代反应在β-榄香烯母体上引入含氮芳杂环合成目标化合物.采用SRB法测定目标化合物对癌细胞增殖的抑制作用.结果 共合成9个未见报道的β-榄香烯类化合物,其结构经红外光谱、核磁共振氢谱和质谱确证.所有化合物对3种人癌细胞HL-60、HeLa、SGC-7901的IC50值均远低于β-榄香烯.结论 在β-榄香烯结构中引入含氮芳杂环,可改善化合物的水溶性,显著提高体外抗癌活性.     

N-[3-(2-呋喃基)丙烯酰基]-N'-取代苄基哌嗪类化合物的合成与生物活性研究

目的合成了N-3-[(2-呋喃基)丙烯酰基]-N'-取代基哌嗪类化合物,并对其进行生物活性的初步测试。方法以呋喃丙烯酸为原料,与不同的取代苄基哌嗪反应,得到一系列哌嗪类化合物;通过MTT法,测定目标化合物对血清诱导的血管平滑肌细胞增殖的抑制活性。结果与结论合成了12个未见文献报道的化合物,所有化合物的结构均经IR、~1H-NMR、EA和MS确证;活性测试结果表明,化合物5d、5e、5f、5g、5h、5i具有一定的血管平滑肌细胞增殖抑制活性。     

N-取代苯基-2-(4-取代苯基)环丙烷-1-甲酸乙酯-1-酰胺的设计、合成及抗肿瘤活性

目的设计、合成N-取代苯基-2-(4-取代苯基)环丙烷-1-甲酸乙酯-1-酰胺类化合物,并进行抗肿瘤活性研究。方法采用微波反应,经缩合、环化、水解以及酰胺化等反应合成目标化合物。所合成化合物经1H NMR谱图和质谱进行确证,并对其进行体外抗肿瘤活性筛选。结果设计、合成了20个环丙烷酰胺类化合物。体外药理活性实验显示,所合成的目标化合物具有较好的抗肿瘤活性,其中5b对A549细胞的IC50值为6.8μM,具有进一步研究的价值。结论对氯苯基取代化合物比对三氟甲基苯基取代化合物有更好的抗肿瘤活性;酰胺芳香环吸电子基团化合物活性优于供电子基团化合物。     

Synthesis and biological evaluation of 1-cyano-2-amino-benzimidazole derivatives as a novel class of antitumor agents

A series of 1-cyano-2-amino-benzimidazole derivatives were synthesized and evaluated for their cytotoxic activities in vitro against three human cancer cell lines (human lung carcinoma cell line: A549, human leukemia cell line: K562, and human prostate cancer cell line: PC-3). Most of these compounds showed potent activities against these tumor cell lines, especially against A549 and K562 cell lines. The preliminary structure–activity relationships of 1-cyano-2-amino-benzimidazole derivatives were also discussed. The cell cycle analysis was carried out in K562 cells and the results showed that compound 4d caused a marked increase of cells in G ₂/M phase.     

Synthesis and biological evaluation of oleanolic acid derivatives as antitumor agents

Derivatives of oleanolic acid were synthesized and evaluated in vitro for their growth inhibition against human hepatocellular carcinoma cell line (HepG2) and colon cancer cell line (Col-02). Several derivatives exhibited moderate-to-good inhibitory activity, with 3 displaying the most promising inhibition [GI?? = 1.75 μM (HepG2), 0.71 μM (Col-02)]. Structure-activity relationship analyses of these derivatives demonstrated that a 1-en-2-cyano-3-oxo in ring A and a nitro at C-17 were important in retention of the inhibition against HepG2 and Col-02 cells.     

Synthesis and preliminary pharmacological investigation of the central action of derivatives of 3-aminomethyl-5-(p-chlorophenyl)-tetrahydrofuran-2-one and 2-aminomethyl-4-(p-chlorophenyl)-4-hydroxybutyric acid

Using 3-cyano-5-(p-chlorophenyl)-tetrahydrofuran-2-one 4, 3-aminomethyl derivatives of 5-(p-chlorophenyl)-tetrahydrofuran-2-one were synthesized. The starting material under alkaline hydrolysis yielded 5-(p-chlorophenyl)-tetrahydrofuran-2-one-3-carboxylic acid 5, which was transformed, via an acid chloride, into amide 6. From acid 5 by aminomethylation compounds 7-12 were obtained. Some of them (7, 8, 12) in reactions of ammono-, amino-, and hydrazinolysis yielded corresponding derivatives of 2-aminomethyl-4-(p-chlorophenyl)-4-hydroxybutyric acid 13-20. In pharmacological tests compounds 10 displayed analgesic activity while compounds 2 and 3 revealed anxiolytic properties.     

Antitumor imidazotetrazines. 20. Preparation of the 8-acid derivative of mitozolomide and its utility in the preparation of active antitumor agents

The preparation of 3-(2-chlorethyl)-4-oxo-3H-imidazo[5,1-d]-1,2,3,5- tetrazine-8-carboxylic acid, a key derivative of mitozolomide in our exploration of the structure-activity relationships of this class of antitumor agents, is described. The facile conversion to the 8-carbonyl chloride gave a derivative that reacted preferentially with nucleophiles at the 8-position rather than at the reactive 4-oxo group, allowing the preparation of a wide range of ester, thioester, amide (including an amide derived from an amino acid), hydroxamic acid, hydrazide and sulfoximide, azide and diazoacetyl derivatives. The in vivo activity is presented of a range of these compounds against TLX5 lymphoma and L1210 leukemia cell lines.     

新型微管稳定剂吲哚美辛衍生物的合成与抗肿瘤活性研究

目的设计合成一系列吲哚美辛衍生物并测定其体外抗肿瘤和微管蛋白抑制活性。方法以5-甲氧基-2-甲基-3-吲哚乙酸为起始原料经两步酰化反应合成12个化合物,MTT法检测目标化合物对HT29、A549、Hep-2、MCF-7肿瘤细胞的抑制活性,同时采用浊度法评价其体外微管蛋白的抑制作用。结果 12种目标化合物均呈现了优于吲哚美辛的体外抗肿瘤作用和微管蛋白抑制活性,其中3位羧基侧链苯乙基取代的化合物12作用于人结肠癌细胞HT29的IC_(50)(2.2μmol)为吲哚美辛的400倍,并且可以干扰微管聚合,其作用于微管蛋白的IC_(50)为5.6μmol。结论改变吲哚美辛1位酰胺和3位羧酸侧链所得的系列衍生物是一类新型的以微管为靶点的抗肿瘤候选药物。     

Cytotoxic and antitumor constituents in pericarps of Mallotus japonicus

A variety of phloroglucinol derivatives isolated from the pericarps of Mallotus japonicus were assessed for growth inhibiting activity against human larynx (HEp-2) and lung (PC-13) carcinoma cells as well as mouse B16 melanoma, leukemia P388, and L5178Y cells. Most of these derivatives were proved to be significantly cytotoxic in culture. One of them, 3-(3,3-dimethylallyl)-5-(3-acetyl-2,4-dihydroxy-5-methyl-6-methoxybenzyl )- phloracetophenone showed an excellent cytotoxicity against all target tumor cells and a marked prolongation of life-span in mice bearing L5178Y leukemia.     

Enhancement of anti-bacterial and anti-tumor activities of pentacyclic triterpenes by introducing exocyclic α,β-unsaturated ketone moiety in ring A

Ursolic acid, oleanolic acid, glycyrrhetinic acid, and betulinic acid, the representatives of pentacyclic triterpenes, were modified by introducing 2-methylene-3-oxo group as exocyclic α,β-unsaturated ketone moiety in ring A. The anti-bacterial and anti-tumor activities of these derivatives were assayed by comparing with the parent compounds. Results indicated that pentacyclic triterpenes carrying 2-methylene-3-oxo group in the ring A exhibited a significant improvement in anti-bacterial activity that was limited to Gram-positive bacteria Staphylococcus aureus and Bacillus subtilis. The four derivatives also showed an increased cytotoxicity against leukemia, lung, and breast cancer cell lines in a dose-dependent manner in vitro. U2 and O2 compounds showed strong apoptotic activities to lung carcinoma cell lines. The results for the first time provided scientific evidence for improvement of anti-bacterial and anti-tumor activities of pentacyclic triterpenes using derivatives of these compounds.     

Bioassay of ferulic acid derivatives as influenza neuraminidase inhibitors

Four series of ferulic acid derivatives were designed, synthesized, and evaluated for their neuraminidase (NA) inhibitory activities against influenza virus H1N1 in vitro. The pharmacological results showed that the majority of the target compounds exhibited moderate influenza NA inhibitory activity, which was also better than that of ferulic acid. The two most potent compounds were 1m and 4a with IC₅₀ values of 12.77 ± 0.47 and 12.96 ± 1.34 μg/ml, respectively. On the basis of the biological results, a preliminary structure–activity relationship (SAR) was derived and discussed. Besides, molecular docking was performed to study the possible interactions of compounds 1p , 2d , 3b , and 4a with the active site of NA. It was found that the 4-OH-3-OMe group and the amide group (CON) of ferulic acid amide derivatives were two key pharmacophores for NA inhibitory activity. It is meaningful to further modify the natural product ferulic acid to improve its influenza NA inhibitory activity.     

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。     

熊果酸衍生物与查耳酮缀合物的合成及抗肿瘤活性研究

目的 设计、合成喹喔啉熊果酸-查耳酮缀合物.方法 以喹喔啉熊果酸为先导化合物,将查耳酮通过酯化反应拼接到喹喔啉熊果酸得到了一系列喹喔啉熊果酸-查耳酮缀合物,并通过MTT法测试其抗癌活性.结果 合成了6个喹喔啉熊果酸-查耳酮缀合物,其结构均通过1H NMR,13C NMR和HRMS加以确认.初步的生物活性结果表明,这些缀合物对MCF-7、PC-3、GBC-823和KB细胞均有抑制活性,尤其是对MCF-7细胞的抑制活性与熊果酸相比均有提高,其中化合物5(IC50=14.2μmol·L-1),6(IC50=15.3μmol·L-1)和7(IC50=10.6μmol·L-1)对MCF-7细胞的抑制活性甚至强于临床上应用的药物他莫昔芬(IC50=15.9μmol·L-1).同时,这些缀合物对正常的乳腺上皮细胞MCF-10A没有毒性.结论 本研究为开发高效、低毒的的熊果酸衍生物提供了信息和依据.