Novel tricyclic pyrazolo[1,5-d][1,4]benzoxazepin-5(6H)-one: Design, synthesis, model and use as hMAO-B inhibitors
作者:Rui Chen、Jie Xiao、Yong Ni、Han-Fei Xu、Min Zheng、Xu Tong、Tong-Tian Zhang、Chenzhong Liao、Wen-Jian Tang
DOI:10.1016/j.bmc.2016.02.045
日期:2016.4
hMAO-A inhibitors, on which, the intramolecular cyclization led to a very interesting change of isoform selectivity. A series of selective hMAO-B inhibitors (3a–3u) with novel scaffold of tricyclic pyrazolo[1,5-d][1,4]benzoxazepin-5(6H)-one were designed and synthesized. Compound 3u (IC50 = 221 nM) exhibited the best inhibitory activity and isoform selectivity against hMAO-B, superior to selegiline (IC50 = 321 nM)
基于我们最近报道的选择性hMAO-A抑制剂,分子内环化作用导致异构体选择性发生了非常有趣的变化。设计并合成了一系列具有新型三环吡唑并[1,5- d ] [1,4]苯并恶嗪-5(6 H)-支架的选择性hMAO-B抑制剂(3a - 3u)。化合物3u(IC 50 = 221 nM)表现出最佳的抑制活性和对hMAO-B的同工型选择性,优于司来吉兰(IC 50 = 321nM),其是用于帕金森氏病的商业选择性hMAO-B抑制剂。模型研究表明,我们的化合物对hMAO-B的选择性取决于至少两个残基,即Ile 199和Cys 172(或对应于hMAO-A的Phe 208和Asn 181)。这些数据支持进一步的研究,以评估更有效的选择性hMAO-B抑制剂的合理设计。