Synthesis and Biological Evaluation of New Imidazole, Pyrimidine, and Purine Derivatives and Analogs as Inhibitors of Xanthine Oxidase
作者:Giuliana Biagi、Alberto Costantini、Luca Costantino、Irene Giorgi、Oreste Livi、Piergiorgio Pecorari、Marcella Rinaldi、Valerio Scartoni
DOI:10.1021/jm950876u
日期:1996.1.1
imidazole, 2,4,5-trisubstituted pyrimidine, 2-substituted purine, thiazolo[3,2-alpha]purine, [1,3]thiazino[3,2-alpha]purine, thiazolo[2,3-i]purine, [1,3]thiazino-[2,3-i]purine, and 6-substituted pyrazolo[3,4-d]pyrimidine were synthesized and tested as inhibitors of the xanthine oxidase enzyme. Of those, some 4-(acylamino)-5-carbamoylimidazoles and 2-thioalkyl-substituted purines exhibited very good inhibitory
4,5-二取代咪唑,2,4,5-三取代嘧啶,2-取代嘌呤,噻唑并[3,2-α]嘌呤,[1,3]噻嗪并[3,2-α]嘌呤,噻唑的几种衍生物合成了[2,3-i]嘌呤,[1,3]噻嗪基-[2,3-i]嘌呤和6-取代的吡唑并[3,4-d]嘧啶,并作为黄嘌呤氧化酶的抑制剂进行了测试。其中,一些4-(酰基氨基)-5-氨基甲酰咪唑和2-硫代烷基取代的嘌呤表现出非常好的抑制活性,比别嘌呤醇的抑制作用至少强500倍。根据抑制剂别嘌呤醇结合的已知机理,可将6-正烷基吡唑并[3,4-d]嘧啶的无效归因于烷基链,这可能阻碍与钼的配位。咪唑衍生物的有效性,与之相反,4,5-二氨基-2-(硫代烷基)-6-羟基嘧啶表示五元环在与酶相互作用中的相对重要性。此外,有角环化的[1,3]噻嗪基[2,3-i]嘌呤酮具有显着的功效,构成了有趣的一类新抑制剂,并且线性环化衍生物的活性较弱,这使我们能够表征更多恰好面对底物次黄嘌呤的N(1)-C(2)位置的酶的亲脂性区域。