2,4-Diamino-5-deaza-6-Substituted Pyrido[2,3-<i>d</i>]pyrimidine Antifolates as Potent and Selective Nonclassical Inhibitors of Dihydrofolate Reductases
作者:Aleem Gangjee、Anil Vasudevan、Sherry F. Queener、Roy L. Kisliuk
DOI:10.1021/jm950786p
日期:1996.1.1
reversal of the C9-N10 bridge present in folates and most antifolates. The synthesis of the compounds involved the reaction of 2,4,6-triaminopyrimidine with the sodium salt of nitromalonaldehyde to afford the key intermediate 2,4-diamino-6-nitropyrido[2,3-d]pyrimidine (7), in a single step. Reduction of 7 to the 2,4,6-triaminopyrido[2,3-d]pyrimidine (8), followed by reductive amination with the appropriate
合成了十五种新颖的非经典药物和两种经典的2,4-二氨基-6-(苄基氨基)吡啶并[2,3-d]嘧啶类抗叶酸药,作为卡氏肺囊虫,(pc)弓形虫,(tg)大鼠肝的潜在抑制剂(rl) ,以及人(h)重组二氢叶酸还原酶(DHFR)。这些类似物缺乏5-甲基取代,这对提高hDHFR抑制活性是重要的。此外,它们还包含了叶酸和大多数抗叶酸中存在的C9-N10桥的逆转。化合物的合成涉及2,4,6-三氨基嘧啶与亚硝基丙二醛钠盐的反应,得到关键的中间体2,4-二氨基-6-硝基吡啶并[2,3-d]嘧啶(7)。一小步。将7还原为2,4,6-三氨基吡啶并[2,3-d]嘧啶(8),然后用适当的苯甲醛或苯乙醛进行还原胺化,得到目标化合物。使用甲醛和氰基硼氢化钠进行这些类似物的N9甲基化。该类似物表现出对pcDHFR和tgDHFR的显着抑制。N9甲基化显着增加了DHFR抑制能力。化合物11,对tgDHFR的选择性比为9.4的