New aryloxy-quinone derivatives as potential anti-Chagasic agents: synthesis, trypanosomicidal activity, electrochemical properties, pharmacophore elucidation and 3D-QSAR analysis
作者:Karina Vázquez、Christian Espinosa-Bustos、Jorge Soto-Delgado、Ricardo A. Tapia、Javier Varela、Estefanía Birriel、Rodrigo Segura、Jaime Pizarro、Hugo Cerecetto、Mercedes González、Margot Paulino、Cristian O. Salas
DOI:10.1039/c5ra10122k
日期:——
A set of new aryloxy-quinones were synthesized and evaluated in vitro against the epimastigote form of Trypanosoma cruzi and their unspecific cytotoxicity was tested on murine macrophages J-774 cells.
New aryloxy‐quinone derivatives with promising activity on
<i>Trypanosoma cruzi</i>
作者:Christian Espinosa‐Bustos、Karina Vázquez、Javier Varela、Hugo Cerecetto、Margot Paulino、Rodrigo Segura、Jaime Pizarro、Brenda Vera、Mercedes González、Ana M. Zarate、Cristian O. Salas
DOI:10.1002/ardp.201900213
日期:2020.1
with a program to develop new quinone derivatives as biologically active compounds, we designed and synthesized a new series of aryloxy‐quinones, which were evaluated in vitro against Trypanosomacruzi in epimastigote form. Chemical modifications in three specific moieties on the aryloxy‐quinone core were considered for developing newanti‐T. cruziagents. The majority of our new quinones showed higher
继续开发新的醌衍生物作为生物活性化合物的计划,我们设计并合成了一系列新的芳氧基-醌,在体外对上鞭毛体形式的克氏锥虫进行了评估。芳氧基-醌核心上三个特定部分的化学修饰被考虑用于开发新的抗 T。克鲁兹特工。我们的大多数新醌显示出比硝呋莫司更高的效力(IC50 值 <0.70 µM),这是一种用作基线药物的已知药物(IC50 值为 7.00 µM);然而,其中只有两种对 Vero 细胞的选择性高于硝呋莫司。构效关系分析提供了有关这些化合物的立体电子特征的信息,这些信息是增加锥虫活性的原因。使用药效团模型,我们绘制了杀锥虫活性的五种药效特征的替代模式。我们选择了 Epc1 化合物,发现与杀锥虫效果没有关系。这些结果为开发新的芳氧基-醌类化合物的结构特征提供了有用的信息,该化合物对原生动物寄生虫 T. cruzi 具有更高的效力。
Scaffold hopping of sampangine: Discovery of potent antifungal lead compound against Aspergillus fumigatus and Cryptococcus neoformans
Discovery of novel antifungal agents against Aspergillus fumigatus and Cryptococcus neoformans remains a significant challenge in current antifungal therapy. Herein the antifungal natural product sampangine was used as the lead compound for novel antifungal drug discovery. A series of D-ring scaffold hopping derivatives were designed and synthesized to improve antifungal activity and water solubility. Among them, the thiophene derivative S2 showed broad-spectrum antifungal activity, particularly for Aspergillus fumigatus and Cryptococcus neoformans. Moreover, compound S2 also revealed better water solubility than sampangine, which represents a promising antifungal lead compound for further structural optimization.
Synthesis and antiprotozoal activity of naphthofuranquinones and naphthothiophenequinones containing a fused thiazole ring
作者:Ricardo A. Tapia、Luz Alegria、Carlos D. Pessoa、Cristian Salas、Manuel J. Cortés、Jaime A. Valderrama、Marie-Elisabeth Sarciron、Félix Pautet、Nadia Walchshofer、Houda Fillion
DOI:10.1016/s0968-0896(03)00122-6
日期:2003.5
The synthesis of tetracyclic quinones 10a,b, 14a,b, 19a,b and 20a,b is described. The preparations involve regioselective Diels-Alder reactions via trapping the thiazole o-quinodimethane 9 with several benzofuranquinones and benzothiophenequinones. The structure of the regioisomers was assigned through 2D NMR H-1-C-13 HMBC experiments performed on 10a and 14a. Compounds 10a,b, 14a as well as phenol I and the starting quinones 2, 5, 7 and 15 are evaluated against Leishmania sp., Toxoplasma gondii and THP-1 cells. Almost all the tested compounds exhibit significant antiprotozoal activities with lower cytotoxicities than the reference compounds. Among them, quitiones 2 and 14a possess the best activities towards L. donovani and T. gondii with the lowest toxicities. (C) 2003 Elsevier Science Ltd. All rights reserved.