2,4-Diaminopyrido[3,2-d]pyrimidine Inhibitors of Dihydrofolate Reductase from Pneumocystis carinii and Toxoplasma gondii
作者:Andre Rosowsky、Ronald A. Forsch、Sherry F. Queener
DOI:10.1021/jm00014a014
日期:1995.7
Six previously unknown 2,4-diamino-6-(anilinomethyl)- and 2,4-diamino-6-[(N-methylanilino)-methyl]pyrido[3,2-d]pyrimidines (5-10) were synthesized from 2,4-diamino-6-(bromomethyl)-pyrido[3,2-d]pyrimidine hydrobromide (11.HBr) by treatment with the appropriate aniline or N-methylaniline in dimethylformamide at room temperature, with or without NaHCO3 present. Compounds 5-10 were tested as inhibitors
由以下化合物合成了六个先前未知的2,4-二氨基-6-(苯胺基甲基)-和2,4-二氨基-6-[(N-甲基苯胺基)-甲基]吡啶基[3,2-d]嘧啶(5-10)通过在室温下在存在或不存在NaHCO3的条件下,用适当的苯胺或N-甲基苯胺在二甲基甲酰胺中处理,来制备2,4-二氨基-6-(溴甲基)-吡啶并[3,2-d]嘧啶氢溴酸盐(11.HBr)。测试了化合物5-10作为卡氏肺孢子虫,弓形虫和大鼠肝脏中二氢叶酸还原酶的抑制剂,这是针对发现兼具高酶选择性和高效力的亲脂性非经典抗叶酸药物的一项较大努力的一部分。在所测试的六个类似物中,对弓形虫DHFR最有效和最具选择性的是2,4-二氨基-6-[(3',4',5'-三甲氧基-N-甲基苯胺基)甲基]吡啶基[3,2- dd嘧啶(7),IC50为0。0047 microM(针对该酶)与0.026 microM(针对大鼠肝酶)相比。7对刚地弓形虫DHFR的效价与曲美