A novel method to synthesise β-keto sulfones is demonstrated by Bronsted acid promoted oxysulfonylation of alkenes with sulfonyl hydrazides under transition-metal-free conditions. The reaction selectively affords structurally diverse β-keto sulfones in good to excellent yields in a 9:1 mixture of acetonitrile/water.
在无过渡
金属条件下,布朗斯台德酸促进烯烃与磺酰
肼的氧磺酰化,证明了一种合成 β-酮砜的新方法。该反应在
乙腈/
水的 9:1 混合物中选择性地提供结构多样的 β-酮砜,收率良好至极好。