Effect of N<sup>9</sup>-Methylation and Bridge Atom Variation on the Activity of 5-Substituted 2,4-Diaminopyrrolo[2,3-<i>d</i>]pyrimidines against Dihydrofolate Reductases from <i>Pneumocystis carinii</i> and <i>Toxoplasma gondii</i><sup>1a,b</sup>
作者:Aleem Gangjee、Farahnaz Mavandadi、Sherry F. Queener
DOI:10.1021/jm960717q
日期:1997.3.1
3-d]pyrimidines against dihydrofolate reductases (DHFR) was studied. Specifically three nonclassical 2,4-diamino-5-((N-methylanilino)methyl)pyrrolo[2,3-d]pyrimidines with 2',5'-dimethoxyphenyl (2), 3',4'-dichlorophenyl (3), 1'-naphthyl (4), one classical analogue with a 4'-L-glutamate substituent (10), and four nonclassical 2,4-diamino-5-((phenylthio)methyl)pyrrolo[2,3-d]pyrimidines with 3',4'-dimethoxyphenyl
研究了N9甲基化和桥原子变化对2,4-二氨基吡咯并[2,3-d]嘧啶对二氢叶酸还原酶(DHFR)的抑制能力和选择性的影响。具体地,三个非经典的2,4-二氨基-5-((N-甲基苯胺基)甲基)吡咯并[2,3-d]嘧啶与2',5'-二甲氧基苯基(2),3',4'-二氯苯基(3) ,1'-萘基(4),一个具有4'-L-谷氨酸取代基(10)的经典类似物和四个非经典的2,4-二氨基-5-((苯硫基)甲基)吡咯[2,3-d]合成具有3′,4′-二甲氧基苯基(5),3′,4′-二氯苯基(6),1′-萘基(7)和2′-萘基(8)取代基的嘧啶。通过置换中间体2,4-二氨基-5-溴甲基吡咯并[2,3-d]嘧啶14可获得经典和非经典类似物。用适当取代的N-甲基苯胺,苯硫酚或4-(N-甲基氨基)苯甲酰基-L-谷氨酸酯。评估化合物2-8和10对抗卡氏肺孢子虫(pc),弓形虫(tg)和大鼠肝脏(rl)DHFR的能力。N