carboxyphenyl group linked to the benzyl moiety by a bridge of two or four atoms in length. The new analogues were all obtained from 2,4-diamino-5-(5'-iodo-2'-methoxybenzyl)pyrimidine via a Sonogashira reaction, followed, where appropriate, by catalytic hydrogenation. The new analogues were tested as inhibitors of DHFR from Pneumocystis carinii (Pc), Toxoplasma gondii (Tg), and Mycobacterium avium (Ma)
在不断努力设计二氢叶酸还原酶(DHFR)的小分子
抑制剂,该
抑制剂结合了2,4-二
氨基-5-(3',4',5'-
三甲氧基苄基)
嘧啶(trimethoprim,
TMP)的酶结合选择性具有2,4-二
氨基-5-甲基-6-(2',5'-二甲氧基苄基)
吡啶并[2,3-d]
嘧啶(piritrexim,
PTX)的效力,七个先前未描述的2,4-二
氨基-5合成了-[[2'-甲氧基-5'-(取代的苄基)]
嘧啶,其中在5'-位的取代基是通过两个或四个原子的桥连接至苄基部分的羧苯基。新的类似物全部通过Sonogashira反应从2,4-二
氨基-5-(5'-
碘-2'-甲氧基苄基)
嘧啶获得,随后在适当的情况下通过催化氢化获得。测试了新的类似物作为卡氏肺孢子虫(Pc),弓形虫(Tg)和鸟分枝杆菌(Ma)的DHFR
抑制剂,这三种常见的威胁生命的病原体在AIDS患者和因以下原因而导致免疫系统受损的个体中发现用免疫抑制
化学疗法