Radical 1,3-Hydrosulfonylationof Vinyldiazo Compoundswith Sulfinyl Sulfones

Sulfinyl sulfones, as high-valence sulfurization reagents, are widely used to assemble sulfur sources on carbon skeletons, such as one-, two-, and four-carbon synthons, to access organosulfur compounds. However, their reaction with three-carbon synthons has remained a mystery until now. We report here a radical 1,3-hydrosulfonylation of vinyldiazo compounds with sulfinyl sulfones. This reaction not only represents the first example of the reaction of sulfinyl sulfones with three-carbon synthons but also opens up the application of vinyldiazo compounds in radical monofunctionalization.