The γ,δ-epoxy β-hydroxyestes obtained by diastereoselective aldolisation beetwen ester enolates and optically active α,β-epoxyaldehydes, undergo quantitative stereocontrolled lactonisation which can be followed by reduction to provide 2-deoxy hexofuranosides.
通过非对映选择性醛缩
甜菜碱酯烯酸酯和旋光性α,β-环氧醛获得的γ,δ-环氧β-羟基
雌二醇进行定量立体控制的内酯化,然后还原生成2-脱氧六
呋喃糖苷。