4-氨基嘧啶取代的双芳基脲类化合物的合成及抗肿瘤细胞增殖活性

目的设计并合成含有不同取代苯环结构的双芳基脲类化合物,初步评价其体外抗肿瘤细胞增殖活性。方法以ABT-869为先导化合物,利用生物电子等排原理,将其3-氨基-1H-吲唑结构改造为氨基嘧啶环设计新目标化合物;以对硝基苯乙腈为起始原料,经与N,N-二甲基甲酰胺二甲缩醛(DMF-DMA)缩合、环合、还原、酰化、成脲共5步反应合成目标化合物;以索拉非尼(sorafenib)为阳性对照药,采用MTT法,测试目标化合物对乳腺癌细胞株MDA-MB-231的抗增殖活性。结果与结论合成了18个未见报道的双芳基脲类化合物,其结构经1H-NMR和MS谱确证;6个化合物显示较好的体外活性,其中,化合物5r活性突出,为对照药索拉非尼的1.8倍;并且初步探讨了目标化合物的构效关系。     

4,6-双苯基-2-氨基-3-氰基吡啶类化合物的合成及其 抗肿瘤活性研究

目的 设计合成一系列4,6-双苯基-2-氨基-3-氰基吡啶类化合物,并对其体外抗肿瘤活性进行初步评价。方法 以取代苯甲醛、取代苯乙酮、丙二腈和醋酸铵为原料,经一步反应制得目标化合物。采用MTT法,以 MX-58151 为阳性对照药,以 A549、HT-29 和 SMMC-7721为测试细胞株对目标化合物进行体外抗肿瘤活性评价。 结果与结论 合成了13 个未见报道的4,6-双苯基-2-氨基-3-氰基吡啶类化合物, 其结构经¹H-NMR、MS 和 IR 谱确证。体外活性测试结果显示,多数化合物能够在较低的浓度下抑制肿瘤细胞增殖。其中,2-氨基-6-（4-氟苯基）-4-（2,3,4-三甲氧基苯基）-3-氰基吡啶 具有显著的抗肿瘤细胞增殖活性,IC₅₀值达纳摩尔级水平,明显优于阳性对照药MX-58151。     

2-氨基-5-溴-4-取代嘧啶类化合物的合成

目的合成2-氨基-5-溴-4-取代嘧啶类化合物。方法溴素在冰醋酸中溴化2-氨基-4-甲基嘧啶,得到2-氨基-5-溴-4-溴甲基嘧啶以及其他不同溴化程度的中间体,再以2-氨基-5-溴-4-溴甲基嘧啶为底物进行衍生得到一系列2-氨基-5-溴-4-取代嘧啶类化合物。结果与结论目标化合物的结构经1H-NMR、13C-NMR以及GC-MS确证。合成得到的12个化合物中有9个是未见报道的新化合物。     

含吡咯结构的二芳氨基嘧啶类ALK抑制剂的设计合成及抗肿瘤活性研究

目的设计并合成结构新颖的含吡咯结构的二芳氨基嘧啶类ALK抑制剂。方法基于色瑞替尼与ALK蛋白的共晶模型及其构效关系,设计含吡咯结构的二芳氨基嘧啶类化合物;以2,4,5-三氯嘧啶和5-氟-2-硝基苯甲醚为主要起始原料,经N-烃化、N-酰化、N-烃化、硝基还原和N-烃化5步反应得到目标化合物I1;I1与多种脂肪胺经Mannich反应得到目标化合物I2～I16。采用MTT法及HTRF激酶测试法,评价目标化合物的体外抗肿瘤活性。结果与结论合成了16个未见文献报道的二芳氨基嘧啶类化合物,其结构经MS、~1H-NM R谱确证;大部分化合物显示出较强的活性,其中化合物I4的活性最佳,其抑制人间变性淋巴瘤细胞Karpas299和人肺腺癌细胞H2228的IC50值分别为0. 021、0. 12μmol·L~(-1),化合物I4抑制ALK激酶的IC50值为8. 7 nmol·L~(-1),与色瑞替尼活性相当,有进一步研究的价值。     

2,4-二氨基-5-取代苄基嘧啶类化合物的合成及其抑菌活性

用相应的取代苯甲醛(2)与β-苯胺基丙腈(3)在甲醇钠存在下,于二甲基亚砜液中缩合为2-取代苄基3-苯胺基丙烯腈(4),在甲醇钠催化下与盐酸胍反应生成2,4-二氨基-5-取代苄基嘧啶类化合物(1)。测定了12个化合物的抑菌活性,未发现活性优于 TMP 的化合物     

2,4-二氨基-5-取代苯胺基嘧啶类化合物的合成及抗菌活性

在嘧啶类化合物中,以2,4-二氨基嘧啶类化合物对二氢叶酸还原酶的抑制作用较强。甲氧苄胺嘧啶(TMP)已作为磺胺类药物及某些抗生素的抗菌增效剂广泛用于临床。为了寻找抑酶活性或对细菌选择性抑制作用比TMP更强的化合物,对2,4-二氨基-5-取代苄基嘧啶类的苯环上取代基的改造已做了大量的工作;对这类化合物抑酶活性的构效关系也进行了较多的研究。但对这类化合物中嘧啶环与苯环间的桥键次甲基的改造则报道不多。为了     

具有抗肿瘤活性的嘧啶类化合物研究进展

嘧啶类化合物因其广泛的生物活性在医药、农药等领域备受关注,特别是近年来大量具有抗肿瘤活性的嘧啶类化合物被报道,其中一些化合物已进入临床试验阶段。虽然这些化合物都含有嘧啶结构,但它们的作用机制却表现出多样性。如抑制细胞周期蛋白依赖性激酶、酪氨酸蛋白激酶、碳酸酐酶、二氢叶酸还原酶和干扰微管蛋白聚合等。本文将根据嘧啶类化合物的作用靶点,介绍其在抗肿瘤药物研究中的最新进展。     

4(2-氨基乙硫基)-4-脱氧-4′-去甲表鬼臼毒素及其衍生物的合成和抗肿瘤活性

4'-去甲表鬼臼毒素与巯基乙胺在三氟乙酸存在下反应,再经 N-酰化或还原胺化得相应的衍生物共20个。体外药理筛选结果显示这些化合物对 L 1210有抑制活性,但活性比依托泊甙差;对 KB 细胞仅在高浓度显示活性。     

4-芳氨基-6-溴喹唑啉类化合物的合成及抗肿瘤活性的初步研究

目的 设计合成新的4-芳氨基-6-溴喹唑啉类化合物,并评价其抗肿瘤活性。 方法 以4-氯-6-溴喹唑啉和含有不同取代基的(E)-氨基二苯乙烯或4-[2-（2-呋喃基）]乙烯基苯胺为原料,经过亲核取代反应合成了5种目标化合物。采用MTT法,以人低分化胃癌细胞（BGC-823）和人肺癌细胞（A549）为受试细胞株对目标化合物进行体外抗肿瘤活性评价。 结果与结论 所得化合物的结构利用IR、1HNMR、13CNMR和元素分析进行了确认。5种化合物对BGC-823和A549两种细胞模型的体外抗肿瘤活性测试结果表明,大部分化合物具有较好的抗肿瘤活性。     

4-氨基嘧啶苯磺酰胺类化合物的设计、合成及PLK1抑制活性研究

目的 设计、合成一系列4-氨基嘧啶苯磺酰胺类化合物,评价化合物对PLK1(polo-like kinase 1)的抑制活性.方法 以4,6-二氯嘧啶和取代硼酸酯为原料,经Suzuki偶联、氨解反应制备目标化合物V1～V15;测试目标化合物的体外PLK1抑制活性.结果 与结论共合成15个未见文献报道的新化合物,其结构经M...     

4-哌嗪喹唑啉苯甲酰胺类化合物的设计、合成及抗肿瘤活性研究

目的寻找新型苯甲酰胺类组蛋白去乙酰化酶(HDACs)抑制剂,探讨其初步构效关系。方法以恩替司他(MS-275)为先导结构,对其酶表面识别区、链接区及锌离子结合区进行改造,设计并合成了系列4-哌嗪喹唑啉苯甲酰胺类化合物。以取代4-羟基喹唑啉为原料,经氯代、氨解、水解制备苯甲酸类衍生物,然后与邻苯二胺或4-氟邻苯二胺经缩合反应制备目标化合物7a~7h;经体外组蛋白去乙酰化酶1抑制活性试验及对人结肠癌细胞HCT-116的抗增殖活性试验,进行目标化合物的活性评价。结果与结论共合成8个未见文献报道的新化合物,结构经质谱及核磁共振氢谱确认。体外初步活性试验表明,目标化合物均具有HDAC1酶抑制活性及抗肿瘤细胞增殖活性。与MS-275相比,目标化合物对HDAC1酶抑制活性减弱,但化合物体外对人结肠癌细胞HCT-116的抗增殖活性却优于或相当于MS-275,其中化合物7g对HCT-116抑制作用的IC50值为0.245μmol·L-1,具有进一步研究价值。     

Design, synthesis and antimicrobial evaluation of novel 2-aryl-thiazolidin-4-one derivatives

ABSTRACT: Novel 2-arylthiazolidin-4-one derivatives (8a-q and 11) have been synthesized in good-to-excellent yields (70-96%) by one-pot three-component condensation-cyclization reaction of aromatic or aliphatic primary amines, aromatic aldehydes, and thioglycolic acid in polypropylene glycol at 110°C temperature. The in vitro antimicrobial activity of the synthesized 2-arylthiazolidin-4-ones was investigated against a panel of six pathogenic fungal strains, a Gram-positive and three Gram-negative bacteria. Results revealed that the compounds (8a-d) bearing 3-(4-(1H-imidazolylmethyl)phenyl)-substituent displayed significant antibacterial efficacy specifically against Klebsiella pneumoniae (minimum inhibitory concentration 12.5 μg/mL). In addition, some of the synthesized compounds have also shown antimicotic activity against Sporothrix schenckii, Trichophyton mentagrophytes, and Aspergillus fumigatus at the concentration of 50 μg/mL.     

Design,synthesis, in silico and antiproliferative evaluation of novel pyrazole derivatives as VEGFR‐2 inhibitors

As the blockade of the VEGFR‐2 signaling pathway is a viable approach in cancer therapy, the present study focuses on a series of pyrazole based VEGFR‐2 inhibitors that were designed on the basis of the hybridization approach, supported by docking and in silico computational studies. The designed compounds were synthesized through facile synthetic methods and the structures were confirmed by ¹H NMR, ¹³C NMR, MS and elemental analysis. The compounds were screened for in vitro antiproliferative activity against the HT‐29 (human colon cancer) and MCF‐7 (human breast cancer) cell lines by MTT assay. The compounds were also studied for in vitro inhibitory activity against VEGFR‐2 kinase. Among all the tested compounds, compound 6h emerged as a potent agent in the antiproliferative study against HT‐29 and MCF‐7 cells, with IC₅₀ values of 2.36 and 6.59 μM, respectively. Moreover, the same compound exhibited the highest VEGFR‐2 inhibitory activity with an IC₅₀ value of 1.89 μM. In docking studies, the designed compounds showed similar and essential key interactions as those of known VEGFR‐2 inhibitors. The present study may lead to new molecules in the development of anticancer agents targeting VEGFR‐2.     

茚酮氨基甲酸酯衍生物的设计合成及其对乙酰胆碱酯酶抑制活性的研究

目的设计合成茚酮氨基甲酸酯衍生物并进行乙酰胆碱酯酶(AChE)抑制活性测试。方法以羟基苯丙酸为起始原料,经分子内Friedel-Crafts酰化、羟基的氨基甲酸酯化和羟醛缩合3步反应合成目标物;采用Ellman法,以拉多替吉(ladostigil)为阳性对照,测试目标化合物对AChE的抑制活性。结果合成了8个未见文献报道的新化合物,其结构和纯度均经1H-NMR、MS谱测定。结论目标化合物对AChE均表现出一定的抑制活性,可作为先导化合物做进一步的改造和修饰。     

新型吲哚类胆固醇酯转运蛋白抑制剂的设计、合成及生物活性研究

目的设计并合成一系列以吲哚为母核的新型小分子胆固醇酯转运蛋白(CETP)抑制剂,并初步评价其体外抑制活性。方法以实验室前期获得的化合物Ⅰ为先导化合物,主要对其吲哚母环的2,3,5位进行修饰改造。以吲哚-2-羧酸乙酯衍生物为原料,通过还原、氧化、还原胺化、取代、Suzuki偶联、亲核取代反应制备得到8个目标化合物;以吲哚或吲哚-2-羧酸乙酯为原料,经Vilsmeier反应在3位引入醛基,再经过还原胺化、取代、Suzuki偶联、亲核取代得到7个目标化合物;进一步通过对2位酯基水解或经还原、烷基化得到另外2个目标化合物。采用BODIPY-CE荧光分析法,以anacetrapib为阳性对照药,测试目标化合物体外对CETP的抑制活性。结果与结论合成了17个未见报道的新化合物,结构经~1H-NM R、M S、~(13)C-NM R谱确证;活性测试表明该类化合物具有中等强度的CETP抑制活性,其中化合物10h的活性较先导化合物有接近10倍的提高,为今后该类化合物的结构优化提供了重要指导。     

Design, synthesis, and biological evaluation of novel 1, 2, 4-triazole derivatives as antifungal agent

A series of novel 1, 2, 4-triazole derivatives (9a?Cp) have been designed and synthesized as the potential antifungal agents. All compounds were characterized by ¹H-NMR, ¹³C-NMR, and LCMS. Their antifungal activities against seven human pathogenic fungi were evaluated in vitro by measuring the minimal inhibitory concentrations. Most of the tested compounds were found to be more potent against Candida albicans than the control drug fluconazole.     

含4-甲基噻唑环的新型二肽基肽酶IV抑制剂的设计、合成及降血糖活性测试

目的：合成一类新型的以4-噻唑环为母体的二肽基肽酶IV (DPP-IV)抑制剂,测试并研究它们的降血糖活性。方法：通过Hantzsch噻唑合成反应制备2-氨基4-甲基噻唑,然后用氯乙酰氯和三乙胺进行氯乙酰化,所得中间体氯乙酰胺经芳基甲胺处理得到目标物,最后,在干燥的乙醚中用氯化氢乙醚溶液处理即可得到目标物的盐酸盐。利用小鼠体内口服葡萄糖耐受量法测定目标化合物在治疗糖尿病方面的活性。结果：合成了21个结构新颖的化合物,结构经过1H-NMR和ESI-MS确认。结论：经过活性测试,发现其中的两个目标化合物具有明显的降血糖作用,其中化合物7f的活性与阳性对照药西他列汀相当,化合物7h的活性则超过阳性对照药,显示了在治疗糖尿病方面的前景。     

Design,synthesis and biological evaluation of ambenonium derivatives as AChE inhibitors

Ambenonium (1), an old AChE inhibitor, is endowed with an outstanding affinity and a peculiar mechanism of action that, taken together, make it a very promising pharmacological tool for the treatment of Alzheimer's disease (AD). Unfortunately, the bisquaternary structure of 1 prevents its passage through the blood brain barrier. In a search of centrally active ambenonium derivatives, we planned to synthesize tertiary amines of 1, such as 2 and 3. In addition, to add new insights into the binding mechanism of the inhibitor, we designed constrained analogues of ambenonium by incorporating the diamine functions into cyclic moieties (4-12). The biological evaluation of the new compounds has been assessed in vitro against human AChE and BChE. All tertiary amine derivatives resulted more than 1000-fold less potent than 1 and, unlike prototype, did not show any selectivity between the two enzymes. This result, because of recent findings concerning the role of BChE in AD, makes our compounds, endowed with a well-balanced profile of AChE/BChE inhibition, valuable candidates for further development. To better clarify the interactions that account for the high affinity of 1, docking simulations and molecular dynamics studies on the AChE-1 complex were also carried out.     

Design and synthesis of novel 1,4-benzodiazepine derivatives and their biological evaluation as cholinesterase inhibitors

A new series of 1,4-benzodiazepine-2,5-dione structurally related to cyclopenin has been synthesized. The new compounds were assayed in vivo and in vitro for their ability to inhibit acetylcholinesterase enzyme and were found to have potent reversible anticholinesterase activity when tested in vitro for isolated frog rectus abdominis and guinea pig ileum in addition to increasing brain cholinesterase level in rats when percentage inhibition were tested in vivo, moreover compounds 5a, 5b, 5c and 5g were the most active. LD(50) was performed for these derivatives and they displayed high safety margin.