2-Azolylchromone Derivatives as Potent and Selective Inhibitors of Monoamine Oxidases A and B
作者:Koichi Takao、Takayuki Saito、Daisuke Chikuda、Yoshiaki Sugita
DOI:10.1248/cpb.c16-00527
日期:——
A series of 2-azolylchromone derivatives were synthesized and their monoamine oxidase (MAO) A and B inhibitory activities were evaluated. Of the synthesized compounds, compounds 1b, 2b, 4a–c, 5b and 7b showed potent inhibitory activities against MAO-A (IC50 values, 1b: 0.32 µM; 2b: 0.14 µM; 4a: 0.11 µM; 4b: 0.023 µM; 4c: 0.15 µM; 5b: 0.59 µM; 7b: 0.19 µM) and 4a, c, 5a, c, 6c and 8c for MAO-B (IC50 values, 4a: 0.028 µM; 4c: 0.019 µM; 5a: 0.73 µM; 5c: 0.28 µM; 6c: 0.28 µM; 8c: 0.27 µM). These data suggest that 6-methoxy substitution favors MAO-A inhibition and 7-methoxy substitution favors MAO-B inhibition. In addition, compound 4b was the most potent inhibitor for MAO-A, and compound 4c for MAO-B. This is the first report identifying 2-azolylchromone derivatives as potent monoamine oxidase inhibitors. These results suggest that the 2-triazolylchromone structure may be a useful scaffold for the design and development of novel monoamine oxidase inhibitors, as evidenced by the activities of 4a–c and 5a–c.
合成了一系列2-氮杂环色酮衍生物,并评估了它们对单胺氧化酶(MAO)A和B的抑制活性。在合成的化合物中,化合物1b、2b、4a-c、5b和7b对MAO-A显示出强效抑制活性(IC50值:1b: 0.32 µM;2b: 0.14 µM;4a: 0.11 µM;4b: 0.023 µM;4c: 0.15 µM;5b: 0.59 µM;7b: 0.19 µM),而4a、4c、5a、5c、6c和8c对MAO-B则显示出抑制活性(IC50值:4a: 0.028 µM;4c: 0.019 µM;5a: 0.73 µM;5c: 0.28 µM;6c: 0.28 µM;8c: 0.27 µM)。这些数据表明,6-甲氧基取代基有利于MAO-A的抑制,而7-甲氧基取代基则有利于MAO-B的抑制。此外,化合物4b是MAO-A的最强抑制剂,而化合物4c是MAO-B的最强抑制剂。这是首次报道2-氮杂环色酮衍生物作为强效单胺氧化酶抑制剂的研究结果。这些结果表明,2-三氮唑基色酮结构可能是设计和开发新型单胺氧化酶抑制剂的有用框架,正如4a-c和5a-c的活性所证明的那样。