Synthesis and Study of a Series of 3-Arylcoumarins as Potent and Selective Monoamine Oxidase B Inhibitors
摘要:
New series of 6-substituted-3-arylcoumarins displaying several alkyl, hydroxyl, halogen, and alkoxy groups in the two benzene rings have been designed, synthesized, and evaluated in vitro as human monoamine cuddase A and B (hMAO-A and hMAO-B) inhibitors. Most of the studied compounds showed a high affinity and selectivity to the hMAO-B isoenzyme, with IC50 values on nanomolar and picomolar range. Ten of the 22 described compounds displayed higher MAO-B inhibitory activity and selectivity than selegiline. Coumarin 7 is the most active compound of this series, being 64 times more active than selegiline and also showing the highest hMAO-B specificity. In addition, docking experiments were carried out on hMAO-A and h-MAO-B structures. This study provided new information about the enzyme inhibitor interaction and the potential therapeutic application of this 3-arylcoumarin scaffold.
Synthesis and Study of a Series of 3-Arylcoumarins as Potent and Selective Monoamine Oxidase B Inhibitors
摘要:
New series of 6-substituted-3-arylcoumarins displaying several alkyl, hydroxyl, halogen, and alkoxy groups in the two benzene rings have been designed, synthesized, and evaluated in vitro as human monoamine cuddase A and B (hMAO-A and hMAO-B) inhibitors. Most of the studied compounds showed a high affinity and selectivity to the hMAO-B isoenzyme, with IC50 values on nanomolar and picomolar range. Ten of the 22 described compounds displayed higher MAO-B inhibitory activity and selectivity than selegiline. Coumarin 7 is the most active compound of this series, being 64 times more active than selegiline and also showing the highest hMAO-B specificity. In addition, docking experiments were carried out on hMAO-A and h-MAO-B structures. This study provided new information about the enzyme inhibitor interaction and the potential therapeutic application of this 3-arylcoumarin scaffold.
Visible-light-driven copper-catalyzed aerobic oxidative cascade cyclization of <i>N</i>-tosylhydrazones and terminal alkynes: regioselective synthesis of 3-arylcoumarins
first example of sustainable, intuitive, highly regioselective, visible-light-driven copper catalyzed aerobic oxidative cascade cyclization of N-tosylhydrazones with terminal alkynes for the preparation of 3-arylcoumarins at room temperature. This operationally simple methodology has been successfully applied to a wide range of N-tosylhydrazones and alkynes (49 examples), and proceeds well to afford biologically
我们提出了可持续的,直观的,高度区域选择性的,可见光驱动的铜催化的N-甲苯磺酰with与末端炔烃的有氧氧化级联环化反应,以在室温下制备3-芳基香豆素。这种操作简单的方法已成功应用于各种N-甲苯磺酰hydr和炔烃(49个实例),并且进展顺利,可提供具有生物活性的化合物,例如单胺氧化酶B(MAO-B)抑制剂和辣根过氧化物酶(HRP)抑制剂,在温和的条件下具有令人满意的产量。此外,机理研究表明,反应是通过铜进行的(II18 O 2同位素标记实验证明)-超氧或-过氧配合物介导的末端炔烃的氧化环化反应。
Extensive SAR and Computational Studies of 3-{4-[(Benzylmethylamino)methyl]phenyl}-6,7-dimethoxy-2<i>H</i>-2-chromenone (AP2238) Derivatives
AP2238 was the first compound published to bind both anionic sites of the human acetylcholinesterase, allowing the simultaneous inhibition of the catalytic and the amyloid-beta pro-aggregating activities of AChE. Here we attempted to derive a comprehensive structure-activity relationship picture for this molecule, affording 28 derivatives for which AChE and BChE inhibitory activities were evaluated. Selected compounds were also tested for their ability to prevent the AChE-induced A beta-aggregation. Moreover, docking simulations and molecular orbital calculations were performed.