Design, synthesis and biological evaluation of novel 3,4-dihydro-2(1H)-quinolinone derivatives as potential chitin synthase inhibitors and antifungal agents
作者:Baihui Li、Yangli Shen、Hu Wu、Xiaobo Wu、Lvjiang Yuan、Qinggang Ji
DOI:10.1016/j.ejmech.2020.112278
日期:2020.6
A series of 3,4-dihydro-2(1H)-quinolinone derivatives contained butenediamide fragment were designed and synthesized. Their inhibition potency against chitin synthase and antimicrobial activities were screened in vitro. The enzymatic assays showed that all the synthesized compounds had inhibition potency against chitin synthase at concentration of 300 μg/mL. Compound 2d displayed excellent potency
设计合成了一系列含有丁烯二酰胺片段的3,4-二氢-2(1H)-喹啉酮衍生物。在体外筛选了它们对几丁质合酶的抑制能力和抗菌活性。酶促测定表明,所有合成的化合物在300μg/ mL的浓度下均具有针对甲壳质合酶的抑制能力。化合物2d表现出优异的效能,抑制百分数(IP)值为82.3%,而对照多恶菌素B的IP值为87.5%。IP值高于70%的化合物2b,2e和2s显示出对几丁质合酶的良好抑制能力。此外,2b的IC50值可与多恶英B(0.09 mM)相媲美。化合物2b的Ki为0.12 mM,Lineweaver-Burk图的结果表明2b是与甲壳质合酶结合的非竞争性抑制剂。抗真菌实验表明,这些化合物对真菌菌株,特别是白色念珠菌具有优异的抗真菌活性。化合物2b,2d,2e和2l对白念珠菌的抗真菌活性与氟康唑相当,并且优于多恶灵B。同时,其他化合物对白念珠菌的抗真菌活性也更好(MIC 2μg/ mL )比化合物2n(MIC