The ruthenium-catalyzed flash oxidation of β-allenic esters 1 furnishes α,α'-dihydroxyketones 2 in 24-72% yield. In the case of the chiral allene 1e, the oxidation proceeds with good diastereoselectivity (88% de), i.e. with efficient axis to center chirality transfer. The flash oxidation can also be used for the synthesis of corticosteroids, as exemplified by the transformation of allenic steroid 4 into dihydroxyketone 5.
钌催化的β-烯丙基酯的闪蒸氧化反应1可生成α,α'-二羟基酮2,产率可达24-72%。对于手性烯丙基1e,氧化反应具有良好的立体选择性(88% de),即具有高效的轴向中心手性转移。闪蒸氧化也可用于皮质类
固醇的合成,例如烯丙基类
固醇4转化为二羟基酮5。