The β-hydroperoxy vinyl sulfoxides 3 were synthesized in good to excellent yields by regioselective photooxygenation of racemic vinyl sulfoxides 2. Moderate diastereoselectivities were observed in the ene reaction of singlet oxygen (Schenck Reaction) with the E- or Z-vinyl sulfoxides 2e. Titanium-catalyzed oxygen transfer reaction of these sulfoxy-functionalized racemic allylic hydroperoxides 3 resulted chemoselectively in the corresponding sulfones 5.
通过选择性光氧化反应,合成了产率良好至优异的β-
过氧化氢乙烯亚砜3。在单线态氧(Schenck反应)与E-或Z-
乙烯亚砜2e的ene反应中,观察到了适度的不对称选择性。
钛催化的这些含亚砜官能团的外消旋烯丙基
过氧化氢3的氧转移反应,选择性地生成了相应的砜5。