An efficient synthesis of 2-substituted O4-cyclohexylmethyl-5-nitroso-6-aminopyrimidines from 6-amino-2-mercaptopyrimidin-4-ol has been developed and used to prepare a range of derivatives for evaluation as inhibitors of cyclin-dependent kinase 2 (CDK2). The structure–activity relationships (SARs) are similar to those observed for the corresponding O6-cyclohexylmethoxypurine series with the 2-arylsulfonamide and 2-arylcarboxamide derivatives showing excellent potency. Two compounds, 4-(6-amino-4-cyclohexylmethoxy-5-nitrosopyrimidin-2-ylamino)-N-(2-hydroxyethyl)benzenesulfonamide (7q) and 4-(6-amino-4-cyclohexylmethoxy-5-nitrosopyrimidin-2-ylamino)-N-(2,3-dihydroxypropyl)benzenesulfonamide (7s), were the most potent with IC50 values of 0.7 ± 0.1 and 0.8 ± 0.0 nM against CDK2, respectively. The SARs determined in this study are discussed with reference to the crystal structure of 4-(6-amino-4-cyclohexylmethoxy-5-nitrosopyrimidin-2-ylamino)-N-(2,3-dihydroxypropyl)benzenesulfonamide (7j) bound to phosphorylated CDK2/cyclin A.
我们开发了一种从 6-
氨基-2-
巯基嘧啶-4-醇高效合成 2-取代 O4-环己基甲基-5-亚硝基-6-
氨基嘧啶的方法,并将其用于制备一系列衍
生物,以评估其作为细胞周期蛋白依赖性激酶 2(CDK2)
抑制剂的效果。其结构-活性关系(
SAR)与相应的 O6-环己基甲氧基
嘌呤系列相似,其中 2-芳基磺酰胺和 2-芳基甲酰胺衍
生物显示出卓越的效力。其中 4-(6-
氨基-4-环己基甲氧基-5-亚
硝基嘧啶-2-基
氨基)-N-(2-羟乙基)苯磺酰胺(7q)和 4-(6-
氨基-4-环己基甲氧基-5-亚
硝基嘧啶-2-基
氨基)-N-(2,3-二羟基丙基)苯磺酰胺(7s)这两种化合物的药效最强,IC50 值分别为 0.对 CDK2 的 IC50 值分别为 0.7 ± 0.1 和 0.8 ± 0.0 nM。本研究中确定的
SARs 参照了与
磷酸化 CDK2/cyclin A 结合的 4-(6-
氨基-4-环己基甲氧基-5-亚
硝基嘧啶-2-基
氨基)-N-(2,3-二羟基丙基)苯磺酰胺(7j)的晶体结构进行了讨论。