Electrochemical α‐C(sp ³ )‐H Functionalization of Aryl Ketones via Thianthrenium Intermediates

Electrochemical preparation and transformation of sulfonium ions have been paid increasing attention. Herein, we have developed an efficient electrochemical approach for the α‐C(sp 3 )‐H functionalization of aryl ketones via sulfonium salt pool. The reaction proceeds under constant current conditions at ambient temperature, avoiding the complex low‐temperature operation typically required in the electrochemical generation of cation pools, and allowing the use of oxidatively sensitive nucleophiles, particularly ones with less positive potential than that of thianthrene as reaction partners, for downstream functionalization.