Synthesis and antibacterial activity evaluation of C-5 side chain modified analogues of FYL-66, a potential agent against methicillin-resistant Staphylococcus aureus
作者:Xiaoyan Yang、Zicheng Li、Zhenling Wang、Zitai Sang、Haiyue Long、Jianying Tang、Tao Yang、Yuanyuan Liu、Youfu Luo
DOI:10.1039/c5md00101c
日期:——
as new chemical entities (NCE) with pronounced in vitro and in vivo activities against MRSA and MSSA. Aiming to explore the structure–activity relationship at the C-5 side chain of FYL-66 and find novel potential antibacterial agents, a series of analogues were designed and synthesized by the introduction of various substituents at the C-5 position of the oxazolidinone ring. Their in vitro antibacterial
FYL-66及其盐酸盐FYL-67已被鉴定为对MRSA和MSSA具有明显的体外和体内活性的新化学实体(NCE)。为了探索FYL-66 C-5侧链的结构-活性关系并发现新型潜在的抗菌剂,通过在恶唑烷酮环的C-5位置引入各种取代基,设计并合成了一系列类似物。还通过微量稀释法评估了它们的体外抗菌活性。新颖的化合物31,33,37,39和40在MIC值为2-4μgmL -1的范围内显示出有效的抗菌活性。发现二氟取代的类似物40在抗菌功效,理化性质和安全性之间具有良好的平衡。在鼠类全身感染模型中,类似物40显示出与FYL-66相当的保护率。绝对生物利用度为40其半衰期为8.87±3.25 h(po)和5.40±1.40 h(iv),为89.6%。同时,我们的发现表明FYL-66的C-5侧链的重要性,并暗示具有小C-5取代基的模拟乙酰胺基的化合物表现出更好的活性。同样令人感兴趣的是,FYL-66,Li