developed. A (racemic) key intermediate was prepared by a cobalt-mediated Pauson-Khand reaction. In the course of the further synthesis, the introduction of the nucleobase was achieved with complete regio- and diastereoselectivity through a palladium-catalyzed allylic substitution.
[反应:见正文]已开发出一种通用的合成方法,用于单保护碳环核苷类似物,其核碱基与3-羟甲基-4-三烷基甲
硅烷基氧基甲基-环戊-2-烯-1-基骨架相连。(外消旋)关键中间体通过
钴介导的Pauson-Khand反应制备。在进一步合成的过程中,通过
钯催化的烯丙基取代以完全的区域选择性和非对映选择性实现了核碱基的引入。