Synthesis and evaluation of 7-substituted coumarin derivatives as multimodal monoamine oxidase-B and cholinesterase inhibitors for the treatment of Alzheimer's disease
作者:Jacques Joubert、Germaine B. Foka、Benjamin P. Repsold、Douglas W. Oliver、Erika Kapp、Sarel F. Malan
DOI:10.1016/j.ejmech.2016.09.041
日期:2017.1
A series of 7-substituted coumarin derivatives were designed and synthesised to display ChE and MAO-B inhibitory activity. The compounds consisted out of a coumarin structure (MAO-B inhibitor) and benzyl-, piperidine-, N-benzylpiperidine- or p-bromo-N-benzylpiperizine moiety, resembling the N-benzylpiperidine function of donepezil (ChE inhibitor), connected via an alkyl ether linkage at the 7 position
设计并合成了一系列7-取代的香豆素衍生物,以显示ChE和MAO-B抑制活性。这些化合物由香豆素结构(MAO-B抑制剂)和苄基,哌啶,N-苄基哌啶-或对溴-N-苄基哌嗪部分组成,类似于多奈哌齐的N-苄基哌啶功能(ChE抑制剂),通过在7位的烷基醚键。的生物测定结果表明,所有化合物(1 - 25)显示选择性抑制到hMAO-B,历时hMAO-A,用苄氧基系列(1 - 8,10 - 13)显示出纳摩尔浓度的hMAO-B抑制作用(IC 50:0.5-73 nM)。然而,对于苄氧基系列观察到有限的ChE抑制活性,除了2,尤其是3显示出选择性的BuChE抑制外。该系列3显示出最佳的多功能活性(eqBuChE IC 50 = 0.96μM,hMAO-A IC 50 = 2.13μM,hMAO-B IC 50 = 0.0021μM)。内的Ñ苄基哌啶(16 - 19)和p溴代Ñ -benzylpiperizine(21