methyl (2RS,3RS,4SR)-4-<(5,5-dimethyl-1,3-dioxan-2-yl)methyl>-2-ethoxy-3-(2-phenylsulfinylethyl)-3,4-dihydro-2H-pyran-5-carboxylate 在
三甲氧基磷 作用下,
以
xylene 为溶剂,
反应 12.0h,
以91%的产率得到methyl (2RS,3RS,4SR)-4-<(5,5-dimethyl-1,3-dioxan-2-yl)methyl>-3-ethenyl-2-ethoxy-3,4-dihydro-2H-pyran-5-carboxylate