Design, synthesis and biological evaluation of novel quinazoline-2,4-diones conjugated with different amino acids as potential chitin synthase inhibitors
作者:Nada A. Noureldin、Hend Kothayer、El-Sayed M. Lashine、Mohamed M. Baraka、Yanrong Huang、Bing Li、Qinggang Ji
DOI:10.1016/j.ejmech.2018.05.001
日期:2018.5
acetamido) acids) (6 a-m), (7) has been designed to inhibit the action of fungus chitin synthase enzyme (CHS). The synthesis of the designed compounds was carried out in four steps starting from the reaction between 1-methylquinazoline-2,4(1H,3H)-dione and ethyl chloroacetate to yield the ethyl acetate derivative. This ester was hydrolyzed to the corresponding carboxylic acid derivative that was then
设计了一系列(2-(1-甲基-2,4-二氧代-1,2-二氢喹唑啉-3(4H)-基)乙酰氨基)酸)(6 am),(7)来抑制真菌几丁质合酶(CHS)。从1-甲基喹唑啉-2,4(1H,3H)-二酮与氯乙酸乙酯的反应开始,以四个步骤进行设计化合物的合成,从而得到乙酸乙酯衍生物。将该酯水解成相应的羧酸衍生物,然后将其用于偶联几个氨基酸,得到最终设计的化合物。测试合成的化合物对CHS的抑制作用。化合物7的效价最高,最小抑菌浓度(IC50)为0.166 mmol / L,而多恶菌素B(阳性对照)的IC50为0.17 mmol / L。还使用熏蒸曲霉,黄曲霉,新孢子菌和白色念珠菌评估了合成的化合物的体外抗真菌活性。不幸的是,与使用的活性对照相比,这14种合成的化合物显示出较低的体外活性。然而,化合物6m和氟康唑对黄曲霉具有协同作用。化合物7和氟康唑对熏蒸曲霉具有协同作用。