Selective <i>Pneumocystis carinii </i>Dihydrofolate Reductase Inhibitors: Design, Synthesis, and Biological Evaluation of New 2,4-Diamino-5-substituted-furo[2,3-<i>d</i>]pyrimidines
作者:Aleem Gangjee、Xin Guo、Sherry F. Queener、Vivian Cody、Nikolai Galitsky、Joe R. Luft、Walter Pangborn
DOI:10.1021/jm970537w
日期:1998.4.1
obtained from 2,4-diamino-6-hydroxypyrimidine and 1, 3-dichloroacetone. The compounds were evaluated as inhibitors against DHFR from P. carinii, Toxoplasma gondii, and rat liver. Two analogues, 2,4-diamino-5-[(2'-naphthylthio)methyl]furo[2, 3-d]pyrimidine (5) and 2,4-diamino-5-[(2'-phenylanilino)methyl]furo[2,3-d]pyrimidine (11) showed significant selectivity and potency for pcDHFR compared to trimethoprim
非经典抗叶酸剂,2,4-二氨基-5-取代的呋喃[2,3-d]嘧啶3-12,具有C8-S9,C8-N9和C8-O9的桥接区域以及1-萘基,2-萘基合成2-苯氧基苯基,4-苯氧基苯基和2-联苯基侧链作为先前报道的2,4-二氨基-5-(苯胺基甲基)呋喃[2,3-d]嘧啶的苯环附加类似物。苯环附加类似物经设计可与卡氏肺孢子虫(pc)的二氢叶酸还原酶(DHFR)的Phe69特异性相互作用,从而提供pcDHFR的选择性抑制剂。还合成了另外的取代的苯基侧链,其包括2,5-二氯,3,4-二氯,3,4,5-三氯,3-甲氧基和2,5-二甲氧基类似物13-17。通过用适当的硫醇亲核取代2,4-二氨基-5-(氯甲基)呋喃[2,3-d]嘧啶(2)制备化合物 胺或萘酚。化合物2由2,4-二氨基-6-羟基嘧啶和1,3-二氯丙酮获得。将该化合物评价为对卡氏假单胞菌,弓形虫和大鼠肝脏的DHFR的抑制剂。两种类似物,2,4-