A 4‘-<i>C</i>-Ethynyl-2‘,3‘-Dideoxynucleoside Analogue Highlights the Role of the 3‘-OH in Anti-HIV Active 4‘-<i>C</i>-Ethynyl-2‘-deoxy Nucleosides
作者:Maqbool A. Siddiqui、Stephen H. Hughes、Paul L. Boyer、Hiroaki Mitsuya、Que N. Van、Clifford George、Stefan G. Sarafinanos、Victor E. Marquez
DOI:10.1021/jm049550o
日期:2004.10.1
4'-C-ethynyl-2'-deoxynucleosides belong to a novel class of nucleoside analogues endowed with potent activity against a wide spectrum of HIV viruses, including a variety of resistant clones. Although favorable selectivity indices were reported for several of these analogues, some concern still exists regarding the 3'-OH group and its role in cellular toxicity. To address this problem, we removed the
4'-C-乙炔基-2'-脱氧核苷属于一类新型的核苷类似物,具有针对多种HIV病毒(包括多种抗性克隆)的强大活性。尽管据报道对这些类似物中的几种具有有利的选择性指数,但是对于3'-OH基团及其在细胞毒性中的作用仍然存在一些担忧。为解决此问题,我们从4'-C-乙炔基-2'-脱氧胞苷(1a)中除去了3'-OH基团。选择该化合物是因为其兼具高效能和低选择性指数。除去3'-OH并不容易。它需要不同于用于合成母体化合物的合成方法。从缩水甘油基-4-甲氧基苯基醚开始,目标4'-C-乙炔基-2',3' 13个步骤后获得-二脱氧胞苷类似物(rac-1h)。在细胞分析中,rac-1h对HIV(LAI)完全没有活性(0.001-10 microM),表明3'-OH对于抗病毒活性至关重要。为了确定3'-OH的作用对于通过细胞激酶将化合物磷酸化或抑制DNA聚合是否必不可少,我们合成并测试了5'-三磷酸酯(rac-1