Synthesis of 2,4-Diamino-6-[2‘-<i>O</i>-(ω-carboxyalkyl)oxydibenz[<i>b</i>,<i>f</i>]azepin-5-yl]methylpteridines as Potent and Selective Inhibitors of <i>Pneumocystis </i><i>c</i><i>arinii,</i> <i>Toxoplasma </i><i>g</i><i>ondii</i>, and <i>Mycobacterium </i><i>a</i><i>vium </i>Dihydrofolate Reductase
作者:Andre Rosowsky、Hongning Fu、David C. M. Chan、Sherry F. Queener
DOI:10.1021/jm030599o
日期:2004.5.1
and piritrexim (PTX) as inhibitors of dihydrofolate reductase (DHFR) from Pneumocystis carinii (Pc), Toxoplasma gondii (Tg), and Mycobacterium avium (Ma), three of the opportunistic organisms known to cause significant morbidity and mortality in patients with AIDS and other disorders of the immune system. The ability of the new analogues to inhibit reduction of dihydrofolate to tetrahydrofolate by Pc
合成了6个先前未描述的N-(2,4-二氨基蝶啶-6-基)甲基二苯并[b,f]氮杂环庚烷,它们在2'-位具有水溶性O-羧基烷氧基或O-羧基苄氧基侧链,并与甲氧苄氨嘧啶(TMP)比较)和派瑞特新(PTX)作为卡那氏肺孢子虫(Pc),弓形虫(Tg)和鸟分枝杆菌(Ma)的二氢叶酸还原酶(DHFR)抑制剂,这三种已知的机会生物均会导致AIDS患者的高发病率和死亡率和其他免疫系统疾病。确定了新类似物抑制Pc,Tg,Ma和大鼠DHFR将二氢叶酸还原为四氢叶酸的能力,并根据IC(50)(rat DHFR)/ IC(50)之比计算了选择性指数(SI)。 )(Pc,Tg或Ma DHFR)。2'-O-羧丙基类似物(10)的IC(50)值,括号中的SI值相对于Pc DHFR为1.1 nM(1300),相对于Tg DHFR为9.9 nM(120)和相对于Ma DHFR为2.0 nM(600)。2'-O-(4-羧基苄氧基)类似物(12)的相应值为1