Synthesis of Amide and Ester Derivatives of Cinnamic Acid and Its Analogs: Evaluation of Their Free Radical Scavenging and Monoamine Oxidase and Cholinesterase Inhibitory Activities
作者:Koichi Takao、Kazuhiro Toda、Takayuki Saito、Yoshiaki Sugita
DOI:10.1248/cpb.c17-00416
日期:——
and selective MAO-B inhibitory activity. Compound 20 was the most potent inhibitor of MAO-B. Compounds 18 and 21 showed moderate BChE inhibitory activity. In addition, compound 18 showed potent antioxidant activity and MAO-B inhibitory activity. In a comparison of the cinnamic acid amides and esters, the amides exhibited more potent DPPH free radical scavenging activity, while the esters showed stronger
合成了一系列肉桂酸衍生物,酰胺(1-12)和酯(13-22),并建立了抗氧化活性与单胺氧化酶(MAO)A和B,乙酰胆碱酯酶和丁酰胆碱酯酶(BChE)的构效关系。分析抑制活性。在合成的化合物中,化合物1-10、12-18和迷迭香酸(23)含有邻苯二酚,邻甲氧基苯酚或5-羟基吲哚部分,它们显示出有效的1,1-二苯基-2-吡啶并肼基(DPPH)自由基清除活动。化合物9-11、15、17-22显示出有效和选择性的MAO-B抑制活性。化合物20是最有效的MAO-B抑制剂。化合物18和21显示出中等的BChE抑制活性。另外,化合物18显示出有效的抗氧化剂活性和MAO-B抑制活性。在肉桂酸酰胺和酯的比较中,酰胺表现出更强的DPPH自由基清除活性,而酯显示出对MAO-B和BChE的较强抑制活性。这些结果表明,肉桂酸衍生物,例如化合物18,对香豆酸3,4-二羟基苯乙基酯,和化合物20,对香豆酸苯乙酯,可以用