Synthesis of 2,6-diamino-5-[(2-substituted phenylamino)ethyl]pyrimidin-4(3<i>h</i>)-one as inhibitors of folate metabolizing enzymes
作者:Aleem Gangjee、Ying Wang、Sherry F. Queener、Roy L. Kisliuk
DOI:10.1002/jhet.5570430615
日期:2006.11
midin-4(3H)-one 2a-f in three steps. The N-methyl analogues 3a-3e were prepared by reductive methylation. These compounds were evaluated against dihydrofolate reductase from Escherichia coli, Toxoplasma gondii, Pneumocystis carinii, human, and rat liver. Few compounds were marginally active against dihydrofolate reductase. The most potent inhibitor, (2c) which has a 1-naphthyl substituent on the side
合成了一系列十一种新颖的2,6-二氨基-5-[(2-取代的苯基氨基)乙基]嘧啶-4(3 H)-一衍生物,作为二氢叶酸还原酶(DHFR)和胸苷酸合酶(TS)的潜在抑制剂。通过改进的方法实现了类似物2a-f,3a和3e的合成。使用可商购的苯胺12a-f作为起始原料,其与氯乙醛反应,然后与氰基乙酸酯反应,并与胍进行环缩合,得到2,6-二氨基-5-[(2-取代的苯基氨基)乙基]嘧啶-4(3 H)- 2a-f分为三个步骤。N-甲基类似物3a-3e通过还原甲基化制备。对这些化合物针对大肠杆菌,弓形虫,卡氏肺孢子虫,人和大鼠肝脏的二氢叶酸还原酶进行了评估。很少有化合物对二氢叶酸还原酶有轻微的活性。最有效的抑制剂(2c)在侧链上具有1-萘基取代基,分别针对大肠埃希菌和弓形虫DHFR的IC 50 = 150μM和9.1μM。