5,5′-Substituted Indirubin-3′-oxime Derivatives as Potent Cyclin-Dependent Kinase Inhibitors with Anticancer Activity
摘要:
To enhance the ability of indirubin derivatives to inhibit CDK2/cyclin E, a target of anticancer agents, we designed and synthesized a new series of indirubin-3'-oxime derivatives with combined substitutions at the 5 and 5' positions. A molecular docking study predicted the binding of derivatives with OH or halogen substitutions at the 5' position to the ATP binding site of CDK2, revealing the critical interactions that may explain the improved CDK2 inhibitory activity of these derivatives. Among the synthesized derivatives, the 5-nitro-5'-hydroxy analogue 3a and the 5-nitro-5'-fluoro analogue Sa displayed potent inhibitory activity against CDK2, with IC(50) values of 1.9 and 1.7 nM, respectively. These derivatives also showed antiproliferative activity against several human cancer cell lines, with IC(50) values of 0.2-3.3 mu M. A representative analogue, 3a, showed greater than 500-fold selectivity for CDK relative to selected kinase panel and potent in vivo anticancer activity.
One-Pot Synthesis of Heterocyclic β-Chlorovinyl Aldehydes Using Vilsmeier Reagent
作者:Vattoly J. Majo、Paramasivan T. Perumal
DOI:10.1021/jo9608432
日期:1996.1.1
3-Chloro-1H-indole-2-carboxaldehydes are obtained in moderate yields by the one-pot reaction of various substituted 2-[(carboxymethyl)amino]benzoic acids (1a-d) usingVilsmeierreagent (DMF/POCl(3)). The benzfused acyclic diacids analogous to 1a in which nitrogen was replaced by oxygen and sulfur also underwent the reaction smoothly. 3-Chloro-1H-pyrrole-2,4-dicarboxaldehyde was obtained as the only
100 μM. The 3D-QSAR model (encompassing 4 PLS factors), featuring acceptable predictive statistics either in the training set (n = 45, q2 = 0.596) and in the external test set (n = 14, r2ext = 0.695), usefully complemented the pharmacophoremodel by identifying the physicochemical features mainly correlated with the Aβ anti-aggregating potency of the indole and isatin derivatives studied herein.
合成并分析了 36 种新型含吲哚化合物,主要是 3-(2-苯基亚肼基)靛红和结构相关的 1H-吲哚-3-甲醛衍生物,作为 β 淀粉样蛋白 (Aβ) 聚集的抑制剂,Aβ 聚集是阿尔茨海默病的病理生理学标志疾病。新合成的分子的 IC50 值从亚微摩尔到两位数微摩尔范围,提供了结构-活性关系的更多信息。一些新化合物通过抑制单胺氧化酶 A 和 B 表现出令人感兴趣的多靶点活性。在 tau 过度表达的细菌细胞中进行的基于细胞的测定揭示了一些衍生物对 tau 聚集的有前景的额外活性。大约九十个已发表的分子和三十六个新合成的分子的累积数据被用来生成抗淀粉样蛋白生成活性的药效团假说,该假说具有多种功效,令人满意地将“活性”化合物与“非活性”(活性差)化合物区分开来。还针对约 80% 的“活性”化合物(即那些实现低于 100 μM 的有限 IC50 值的化合物)导出了基于原子的 3D-QSAR 模型。 3D-QSAR
Indoxyl-based umpolung strategy for the synthesis of unsymmetrical 3,3′-biindoles
作者:Jing Guo、Jiang Weng、Gong-Bin Huang、Lin-Jie Huang、Albert S.C. Chan、Gui Lu
DOI:10.1016/j.tetlet.2016.10.099
日期:2016.12
3,3′-Bisindoles are known to be important structural motifs found in bioactive natural products, pharmaceuticals, and functional materials. Herein, a novel indoxyl-based approach was established for the synthesis of unsymmetrical 3,3′-biindoles from indoles and indoxyls. This approach generated moderate to excellent yields of the desired products (24 examples, up to 98% yield). The present method features
A Practical and Efficient Vilsmeier Synthesis of 3-Chloroindole-2-carboxaldehydes
作者:Z. H. Li、Z. R. Hu、R. E. Chen、W. K. Su
DOI:10.1080/00304948.2010.514793
日期:2010.10.4
the Vilsmeier cyclization of 2[(carboxymethyl)amino]benzoic acids 1 has provided an effective and more convenient approach for the construction of indole derivatives without any metal catalysts, it suffers the disadvantages of low efficiency with some substrates and unsatisfactory yields.9 Herein, we disclose an efficient and practical process for the improved synthesis of 3-chloroindole2-carboxaldehydes
with antibacterialactivity serve as good candidates for developing novel antibacterial drugs which is very urgent and important. In this work, based on the unique scaffold of indirubin, an active ingredient of traditional Chinese medicine formulation Danggui Luhui Wan, we synthesized 29 indirubin-3′-monoximes and preliminarily evaluated their antibacterialactivities. The antibacterialactivity results
多重耐药微生物病原体是一个严重的全球健康问题。具有抗菌活性的新化合物是开发新型抗菌药物的良好候选者,这是非常紧迫和重要的。本工作基于中药当归鹿汇丸活性成分靛玉红独特的支架,合成了29个靛玉红-3'-单肟,并初步评价了其抗菌活性。抗菌活性结果表明,合成的靛玉红-3′-单肟5a-5z和5aa-5ad对金黄色葡萄球菌ATCC25923表现出良好的效力(MIC = 0.4-25.6 μg mL -1 )。其中,我们发现5-F、5-Cl和7-CF 3取代的靛玉红-3′-单肟5r 、 5s和5aa对金黄色葡萄球菌也表现出更好的抗菌效率(MIC高达0.4 μg mL -1 )比原型天然产物靛玉红(MIC = 32 μg mL -1 )。更重要的是,靛玉红-3'-单肟5aa与左氧氟沙星对临床多重耐药金黄色葡萄球菌具有一定的协同作用(分数抑菌浓度指数:0.375)。此外,还进行了电镜观察、PI染色、细胞外钾离子和核酸(260