Design, Synthesis, and Structure–Activity Relationship Studies of Novel Fused Heterocycles-Linked Triazoles with Good Activity and Water Solubility
摘要:
Triazoles with fused-heterocycle nuclei were designed and evaluated for their in vitro activity on the basis of the binding mode of albaconazole using molecular docking, along with SAR of antifungal triazoles. Tetrahydro-[1,2,4]-triazolo[1,5-a]pyrazine and tetrahydro-thiazolo[5,4-c]pyridine nuclei were preferable to the other four fused-heterocycle nuclei investigated. Potent in vitro activity, broad spectrum and better water solubility were attained when triazoles containing nitrogen aromatic heterocycles were attached to these two nuclei. The most potent compounds 27aa and 45x, with low hERG inhibition and hepatocyte toxicity, both exhibited excellent activity against Candida, Cryptococcus, and Aspergillus spp., as well as selected fluconazole-resistant strains. A high water-soluble compound 58 (the disulfate salt of 45x) displayed unsatisfactory in vivo activity because of its poor PK profiles. Mice infected with C.alb. SC5314 and C.alb. 103 (fluconazole-resistant strain) and administered with 27aa displayed significantly improved survival rates. 27aa also showed favorable pharmacokinetic (PK) profiles.
靶向微管蛋白上的秋水仙碱结合位点是一种很有前景的癌症治疗方法,可以克服当前微管蛋白聚合抑制剂的局限性。新类别的秋水仙碱结合位点抑制剂 (CBSI) 不断被发现;然而,平衡代谢稳定性和细胞效力仍然是一个需要解决的问题。因此,我们设计并合成了一系列新型融合咪唑并吡啶和吡嗪CBSI,并评估了它们的细胞活性、代谢稳定性和微管蛋白结合特性。有证据表明咪唑并[1,2- a ]吡嗪系列对具有MYCN扩增标记的神经母细胞瘤细胞系有效。进一步评估表明,与二氯甲氧基苯基或二氟甲氧基苯基环 D 相比,咪唑并[1,2- a ]吡嗪核心与三甲氧基苯环 D 的组合可产生最高的细胞活性和结合特性。然而,具有三甲氧基苯环 D 的化合物的代谢稳定性二氯甲氧基苯基或二氟甲氧基苯基环 D 显着高于含有三甲氧基苯基环 D 的那些,表明实现了改善的代谢稳定性,同时对效力产生中等影响。