Synthesis of three carbon atom bridged 2,4-diaminopyrrolo[2,3-<i>d</i>]-pyrimidines as nonclassical dihydrofolate reductase inhibitors
作者:Aleem Gangjee、Zhengqu Ye、Sherry F. Queener
DOI:10.1002/jhet.5570420614
日期:2005.9
3-d]-pyrimidines 1a-g. Preliminary biological results indicated that these compounds showed moderate inhibitory activities against dihydrofolate reductases from Pneumocystis carinii, Toxoplasma gondii, Mycobacterium avium and rat liver with IC50 values in the 0.66 μM - 70.1 μM range and some compounds had marginal selectivity for T. gondii dihydrofolate reductase.
合成了一系列七个非经典的三个碳原子桥接的2,4-二氨基-5-取代的吡咯并[2,3- d ]-吡啶1a-g作为二氢叶酸还原酶的潜在抑制剂。二醇7a-g的选择性氧化得到α-羟基酮8a-g。随后与丙二腈缩合,得到必需的2-氨基-3-氰基-4-取代的呋喃前体9a-g。一步在回流的乙醇中与胍进行环缩合,得到三个碳原子桥接的2,4-二氨基-5-取代的吡咯并[2,3- d ]-嘧啶1a-g。初步生物学结果表明,这些化合物对卡氏肺孢子虫,弓形虫,鸟形分枝杆菌和大鼠肝脏中的二氢叶酸还原酶表现出中等抑制作用,IC 50值在0.66μM-70.1μM范围内,并且某些化合物对弓形虫二氢叶酸还原酶的选择性很小。。