由于高感染率和频繁出现的耐药性,真菌感染已成为严重的医学问题。角鲨烯环氧酶(SE)和14α-脱甲基酶(CYP51)被认为是重要的抗真菌靶标,它们可以在抗真菌治疗中发挥协同作用。本研究通过De Novo Link方法筛选了一系列活性片段,并筛选出具有较高Ludi_Scores的活性片段,这些片段均显示出与双靶标(SE,CYP51)的明显结合能力。随后,通过连接这些核心片段,构建了带有萘基酰胺骨架的三个系列目标化合物,并合成了它们的结构。大多数化合物在病原真菌的治疗中均显示出抗真菌活性。值得注意的是具有优良的广谱抗真菌特性的10b-5和17a-2也表现出明显的抗药性真菌抗真菌作用。初步机理研究证明,这些靶标化合物可通过抑制双重靶标(SE,CYP51)的活性来阻断麦角甾醇的生物合成。此外,具有低毒性副作用的目标化合物10-5和17a-2在体内也显示出优异的药理作用。进行了分子对接和ADMET预测,可以指导后续先导化合物的优化。
作者:Nandini Sharma、Vijay Bahadur、Upendra K. Sharma、Debasmita Saha、Zhenghua Li、Yogesh Kumar、Jona Colaers、Brajendra K Singh、Erik V. Van der Eycken
DOI:10.1002/adsc.201800458
日期:2018.8.17
A microwave‐assisted highly efficient intermolecular C−H functionalization sequence has been developed to access substituted isoquinolones using α‐amino acid esters as a directing group. This methodology enables a wide range of N‐benzoyl α‐amino ester derivatives to react via a Ru‐catalysed C−H bond activation sequence, to form isoquinolones with moderate to excellent yields. As an additional advantage
Several oxazoles and thiazoles were synthesized easily by the reaction of N-(methylthioalkylidene)glycine ethyl ester with diethyl oxalate, acid halides, and thionesters in the presence of base.
作者:Jialin Xie、Yuanqiong Huang、Hongjian Song、Yuxiu Liu、Qingmin Wang
DOI:10.1021/acs.orglett.7b02767
日期:2017.11.17
An atom-economical method for accessing tetrasubstituted 4,5-biscarbonylimidazoles by reaction between glycine derivatives and 5-alkoxyoxazoles is reported. The method, which involves a copper-catalyzedaerobic oxidative [2 + 3] cyclization/aromatization cascade process, starts from readily available and inexpensive materials, uses molecular oxygen as a co-oxidant, and has a broad substrate scope.
Construction and Evaluation of Molecular Models: Guide and Design of Novel SE Inhibitors
作者:Yunfei An、Yue Dong、Liu Min、Liyu Zhao、Dongmei Zhao、Jun Han、Bin Sun
DOI:10.1021/acsmedchemlett.0c00017
日期:2020.6.11
Squaleneepoxidase (SE) was considered an important antifungal target to block ergosterol synthesis. In this study, molecular models of CASE including the homology model and the SBP were constructed, respectively. Three representative SE inhibitors were selected and docked into the active site of CASE. Subsequently, the novel SE inhibitors were designed based on the analysis of the inhibitor binding