Design, synthesis and biological evaluation of 2,4-disubstituted oxazole derivatives as potential PDE4 inhibitors
作者:Ya-Sheng Li、De-Kun Hu、Dong-Sheng Zhao、Xing-Yu Liu、Hong-Wei Jin、Gao-Peng Song、Zi-Ning Cui、Lian-Hui Zhang
DOI:10.1016/j.bmc.2017.01.047
日期:2017.3
In this study, a series of pyrazole derivatives containing 4-phenyl-2-oxazole moiety were designed and synthesized in a concise way, some of which exhibited considerable inhibitory activity against PDE4B and blockade of LPS-induced TNF-α release. Compound 4c displayed the strongest inhibition activity (IC50=1.6±0.4μM) and good selectivity against PDE4B. Meanwhile, compound 4c showed good in vivo activity
在这项研究中,以简明的方式设计和合成了一系列含有4-苯基-2-恶唑部分的吡唑衍生物,其中一些对PDE4B表现出相当大的抑制活性,并阻断了LPS诱导的TNF-α释放。化合物4c显示出最强的抑制活性(IC50 = 1.6±0.4μM)和对PDE4B的良好选择性。同时,化合物4c在LPS诱导的哮喘/ COPD和败血症动物模型中显示出良好的体内活性。初步的结构-活性关系研究表明,3,5-二甲基吡唑残基对于生物活性至关重要,苯环上的取代基R1也影响了活性。对接结果表明,化合物4c分别使用酰肼骨架(CONN)和吡唑环在形成完整的氢键和π-π堆积相互作用中起关键作用,与PDE4B蛋白结合。而分子的其余部分扩展到催化域中以阻止cAMP的访问,并形成了抑制PDE4B的基础。基于初步的结构-活性关系和分子模型研究,化合物4c有望作为进一步研究的先导化合物。