Facile synthesis of antimalarial 1,2-disubstituted 4-quinolones from 1,3-bisaryl-monothio-1,3-diketones
作者:Ajjampura C. Vinayaka、Maralinganadoddi P. Sadashiva、Xianzhu Wu、Sergei S. Biryukov、José A. Stoute、Kanchugarakoppal S. Rangappa、D. Channe Gowda
DOI:10.1039/c4ob01455c
日期:——
A new strategy was developed to synthesize 1,2-disubstituted 4-quinolones in good yield starting from 1,3-bisaryl-monothio-1,3-diketone substrates. The synthesized compounds were evaluated for antimalarial activity using Plasmodium falciparum strains. All compounds, except for two, showed good activity. Of these, seven compounds exhibited an excellent antimalarial activity (IC50, <2 μM). More importantly, all seven compounds were equally effective in inhibiting the growth of both chloroquine-sensitive and chloroquine-resistant strains. The cytotoxicity assessment using carcinoma and non-carcinoma human cell lines revealed that almost all synthesized compounds were minimally cytotoxic (IC50, >50 μM).
研究人员开发了一种新策略,以 1,3-二芳基-1,3-单硫基-1,3-二酮底物为起点,以良好的收率合成 1,2-二取代的 4-喹诺酮类化合物。利用恶性疟原虫菌株对合成的化合物进行了抗疟活性评估。除两个化合物外,所有化合物都表现出良好的活性。其中,7 个化合物表现出极佳的抗疟活性(IC50,小于 2 μM)。更重要的是,所有七个化合物在抑制氯喹敏感菌株和氯喹抗性菌株的生长方面都同样有效。使用癌和非癌人类细胞系进行的细胞毒性评估显示,几乎所有合成化合物的细胞毒性都很小(IC50,>50 μM)。