作者:Hans Maag、Robert M. Rydzewski、Mary Jane McRoberts、Diane Crawford-Ruth、Julien P. H. Verheyden、Ernest J. Prisbe
DOI:10.1021/jm00086a013
日期:1992.4
magnitude less active and less toxic than their azido counterparts. Modifications at the 2'- or 3'-position of the 4'-substituted-2'-deoxynucleosides tended to diminish activity. Further evaluation of 4'-azidothymidine (6a) in H9, PBL, and MT-2 cells infected with HIV demonstrated a similar inhibitory profile to that of AZT. However, 4'-azidothymidine (6a) retained its activity against HIV mutants which
合成了一系列核苷,其中4'-氢被叠氮基或甲氧基取代。合成4'-叠氮基类似物的关键步骤是将叠氮化碘立体和区域选择性加成到4'-不饱和核苷前体中,然后通过氧化辅助置换5'-碘基。4'-甲氧基核苷是通过4'-不饱和核苷的环氧化制得的,合适的环氧化物是用甲醇打开的。反应机理考虑,经验构象规则,基于NMR的构象计算和NOE实验表明4'-叠氮核苷偏爱呋喃糖部分的3'-内(N型)构象。当评估它们在A3.01细胞培养物中对HIV的抑制作用时,所有4'-azido-2' -脱氧-β-D-核苷表现出有效的活性。IC50的范围从4'-叠氮基2'-脱氧尿苷(6c)的0.80 microM到4'-叠氮基2'-脱氧鸟苷(6e)的0.003 microM。在该系列中,检测到的细胞毒性是IC50的50-1500倍。4'-甲氧基-2'-脱氧-β-D-核苷的活性比其叠氮基对应物低2-3个数量级,并且毒性更低。4'-取代的-2