An advanced intermediate vinyl iodide corresponding to the C1-C13 fragment of the macrolide biselyngbyaside was prepared by a cross-metathesis reaction between vinyl alcohol and alkene building blocks. The latter fragment, containing two stereocenters, was obtained by employing an asymmetric alkylation, a Wittig reaction, a hydrozirconation, and a Brown allylation as key steps.
通过
乙烯醇与烯烃构建块之间的交叉复分解反应,制备了对应于大环内酯biselyngbyaside的C1-C13片段的高级中间体
乙烯碘化物。含有两个立体中心的后者片段,通过采用不对称烷基化、Wittig反应、氢
锆化以及Brown烯丙基化等关键步骤获得。