Synthesis and evaluation of a classical 2,4-diamino-5-substituted-furo[2,3-d]pyrimidine and a 2-amino-4-oxo-6-substituted-pyrrolo[2,3-d]pyrimidine as antifolates
作者:Aleem Gangjee、Jie Yang、John J. McGuire、Roy L. Kisliuk
DOI:10.1016/j.bmc.2006.08.029
日期:2006.12
Two classical antifolates, a 2,4-diamino-5-substituted furo[2,3-d]pyrimidine and a 2-amino-4-oxo-6-substituted pyrrolo[2,3-d]pyrimidine, were synthesized as potential inhibitors of dihydrofolate reductase (DHFR) and thymidylate synthase (TS). The syntheses were accomplished by condensation of 2,6-diamino-3(H)-4-oxo-pyrimidine with alpha-chloro-ketone 21 to afford two key intermediates 23 and 24, followed
两种经典的抗叶酸剂,2,4-二氨基-5-取代的呋喃[2,3-d]嘧啶和2-氨基-4-氧代-6-取代的吡咯并[2,3-d]嘧啶,作为潜在的合成二氢叶酸还原酶(DHFR)和胸苷酸合酶(TS)抑制剂。该合成是通过 2,6-二氨基-3(H)-4-氧代-嘧啶与 α-氯-酮 21 缩合,得到两个关键中间体 23 和 24,然后水解,与 L-谷氨酸二乙酯偶联来完成的。二乙酯皂化,得到经典的抗叶酸剂 13 和 14。具有单碳原子桥的化合物 13 和 14 都是叶酰聚-γ-谷氨酸合成酶 (FPGS) 的底物,该酶负责形成关键的聚-γ-谷氨酸具有增加效力和/或增加细胞保留的抗叶酸代谢物。化合物 14 是一种高效的 FPGS 底物,证明 2,4-二氨基-5-取代的呋喃[2,3-d]嘧啶是设计具有 FPGS 底物活性的抗叶酸剂的重要先导结构。与双原子桥类似物5相比,它保留了对DHFR和TS的抑制效力。化合物13是