Novel non-classical C9-methyl-5-substituted-2,4-diaminopyrrolo[2,3-d]pyrimidines as potential inhibitors of dihydrofolate reductase and as anti-opportunistic agents
作者:Aleem Gangjee、Jie Yang、Sherry F. Queener
DOI:10.1016/j.bmc.2006.09.008
日期:2006.12
followed by ring closure of the nitro adducts via a Nef reaction. The compounds were evaluated as inhibitors of DHFR from Pneumocystis carinii (pc), Toxoplasma gondii (tg), Mycobacterium avium (ma) and rat liver (rl). The biological result indicated that some of these analogs are potent inhibitors of DHFR and some have selectivity for pathogen DHFR. Compound 23 was a two digit nanomolar inhibitor
合成了六个新颖的C9-甲基-5-取代的2,4-二氨基吡咯并[2,3-d]嘧啶18-23作为二氢叶酸还原酶(DHFR)的潜在抑制剂和抗机会剂。这些化合物仅代表2,4-二氨基吡咯并[2,3-d]嘧啶的碳-碳桥基中的9-甲基取代基。从合适的市售芳族甲基酮开始,以简洁的八步程序合成类似物18-23。关键步骤涉及将2,4,6-三氨基嘧啶与适当的1-硝基烯烃进行迈克尔加成反应,然后通过Nef反应使硝基加合物闭环。将该化合物评价为来自卡氏肺孢子虫(pc),弓形虫(tg),鸟分枝杆菌(ma)和大鼠肝脏(rl)的DHFR抑制剂。生物学结果表明,其中一些类似物是DHFR的有效抑制剂,而某些对病原体DHFR具有选择性。化合物23是两位数的tgDHFR的纳摩尔抑制剂,对tgDHFR的选择性为9.6倍。