The C-ring of 19-hydroxytaxol is stereoselectively constructed by samarium(II) iodide-mediated intramolecular double aldol cyclization of epoxyketo aldehyde to form the BC-ring unit which has the desired stereochemistry.
19-hydroxytaxol 的 C 环是通过
碘化钐(II)介导的环氧酮醛分子内双醛环化反应立体选择性地构建的,从而形成具有所需立体
化学结构的 BC 环单元。