developed for the conversion of alkenes to β-keto/hydroxyl sulfones by their reaction with sulfonyl hydrazides under metal-free conditions. This reaction proceeds through the oxidative addition of alkenes by sulfonyl radicals that are generated by visible-light induced oxidation of sulfonyl hydrazides. Notaly the reaction uses O2 as the terminal oxidant, instead of metal catalysts or oxidants like
various β-substituted arylsulfones using cheap and easily available K2S2O5 as a sulfurdioxide source. Of note, the procedure does not need any extra oxidants and metal catalysts and exhibits a relatively wide substrate scope and good functional group compatibility. Mechanistically, an initial arylsulfonyl radical is formed involving the insertion of sulfurdioxide with aryl diazonium salt, followed
描述了一种新颖的烯烃多组分磺酰化反应,用于使用廉价且易于获得的 K 2 S 2 O 5作为二氧化硫源组装各种 β-取代的芳基砜。值得注意的是,该过程不需要任何额外的氧化剂和金属催化剂,并且具有相对广泛的底物范围和良好的官能团相容性。从机理上讲,初始芳基磺酰基的形成涉及二氧化硫与芳基重氮盐的插入,然后是烯烃的烷氧基芳基磺酰化或羟基磺酰化。