Nucleosideanalogues bearing a fluorine in the C2′-position have been synthesized by SN2-like cyclizations of acyclic thioaminal precursors. This strategy provides access to two scaffolds, d-1′,2′-cis-thiofuranosides and d-1′,2′-trans-furanosides, which are difficult to generate using the standard approach for nucleosidesynthesis. The addition of silylated nucleobases onto model C2-fluorinated dithioacetal
通过无环硫代氨基缩醛前体的S N 2样环化合成了在C2'-位带有氟的核苷类似物。该策略提供了进入两个支架的途径,d -1',2'-顺式-呋喃呋喃糖苷和d -1',2'-反式呋喃糖苷,使用标准的核苷合成方法难以产生。在模型C2氟化的二硫缩醛底物上添加甲硅烷基化的核碱基会导致1,2-顺式非对映选择性,这与C2-F和S一致-烷基部分非常接近。还使用这种方法合成了一系列带有C3'全碳四元中心以及C2'–F原子的类似物,并正在研究其潜在的抗代谢物。