Nucleotides. Part XLIV. Synthesis, characterization, and biological activity of monomeric and trimeric cordycepin-cholesterol conjugates and inhibition of HIV-1 replication
作者:Marita Wasner、Wolfgang Pfleiderer、Earl E. Henderson、Robert J. Suhadolnik
DOI:10.1002/hlca.19940770707
日期:1994.11.2
bonds of the conjugate trimers. The syntheses were performed in solution using phosphoramidite chemistry. The fully protected trimer conjugates 13, 14, and 26 as well as all intermediates were characterized by elemental analyses, UV and 1H-NMR spectra. The deblocked conjugates 15, 16, and 27 were pure according to HPLC and showed the correct compositions by mass spectra. Comparative biological studies indicated
抗病毒活性3'-脱氧腺苷基-(2'-5')-3'-脱氧腺苷基-(2'-5')-3'-脱氧腺苷(cordycepin三聚体核心)在2'-或5'-末端修饰通过经由碳酸酯键(15)或琥珀酸酯连接子(16和27)附着胆固醇来改善细胞通透性。相应的单体结合物4,7,和21虫草素制备成模型物质,研究预期的保护基团的适用性-的单甲氧(MeOTr)时,(叔-丁基)二甲基甲硅烷基(tbds),以及消除β-的2-(4-硝基苯基)乙基(npe)和2-(4-硝基苯基)乙氧羰基(npeoc)基团–用于最后的脱保护步骤,而不会损害酯的酯键共轭三聚体。使用亚磷酰胺化学方法在溶液中进行合成。完全保护的三聚体缀合物13,14,和26通过元素分析,UV和以及所有中间体进行了表征1 H-NMR光谱。解块缀合物15,16,和27根据HPLC是纯粹的,并显示通过质谱正确组合物。比较生物学研究表明,虫草素胆固醇共轭三聚体16和27分