A series of N-(4-alkoxy-3-cyanophenyl)isonicotinamide/nicotinamide derivatives was designed, synthesized and evaluated for inhibitory potency in vitro against xanthine oxidase. The isonicotinamide series was considerably more effective than the nicotinamide series. SARs analysis revealed that the isonicotinoyl moiety played a significant role on the inhibition and that a benzyl ether tail (e.g., ortho-cyanobenzoxy)
设计,合成了一系列N-(4-烷氧基-3-
氰基苯基)异烟酰胺/烟酰胺衍
生物,并评价了其体外对
黄嘌呤氧化酶的抑制作用。异烟酰胺系列比烟酰胺系列有效得多。
SARs分析表明,异烟酰酰基部分在抑制作用中起着重要作用,与
苄腈部分连接的苄基醚尾巴(例如邻
氰基苯甲氧基)对抑制效力有好处。在这些化合物中,10q(IC 50 = 0.3μM)被认为是这项工作中最有效的,并且观察到的效力比别
嘌呤醇高28.3倍,但比托
吡司他的效力低20倍。Lineweaver-Burk图显示10q成为
黄嘌呤氧化酶的混合型
抑制剂。分子模型为这项研究中观察到的
SAR提供了合理的解释。