Synthesis and Biological Evaluation of Nonclassical 2,4-Diamino-5-methylpyrido[2,3-<i>d</i>]pyrimidines with Novel Side Chain Substituents as Potential Inhibitors of Dihydrofolate Reductases
作者:Aleem Gangjee、Anil Vasudevan、Sherry F. Queener
DOI:10.1021/jm960734f
日期:1997.2.1
Nine novel 2,4-diamino-5-methyl-6-substituted-pyrido[2,3-d]pyrimidines, 2-10, were synthesized as potential inhibitors of Pneumocystis carinii dihydrofolate reductase (pcDHFR) and Toxoplasma gondii dihydrofolate reductase (tgDHFR). Compounds 2-5 were designed as conformationally restricted analogues of trimetrexate (TMQ), in which rotation around tau 3 was constrained by incorporation of the side chain
合成了9种2,4-二氨基-5-甲基-6-取代的吡啶并[2,3-d]嘧啶2-10作为卡氏肺孢子虫二氢叶酸还原酶(pcDHFR)和弓形体弓形虫二氢叶酸还原酶(tgDHFR)的潜在抑制剂)。化合物2-5被设计为曲美曲塞(TMQ)的构象受限类似物,其中围绕tau 3的旋转通过结合侧链氮作为二氢吲哚或吲哚环的一部分而受到限制。在侧链氮和苯环之间具有额外原子的类似物6,其氮为四氢异喹啉环的一部分。类似物7-9是表柔伯霉素(Ro 11-8958)类似物,并且与吡咯伯胺类似,在苯基环上含有吡咯环作为侧链取代的一部分。设计这些类似物以研究吡咯取代在2,4-二氨基-5-甲基-6-(苯胺基甲基)吡啶并[2,3-d]嘧啶的苯环上的作用。分子模型表明,在侧链苯环邻位的吡咯取代基最有可能与pcDHFR相互作用,其方式与表必隆的吡咯部分相似。合成类似物10,其中苯环取代了甲氧基,以确定苯环对选择性,亲脂性和细胞渗透性的