Electrochemical Radical Formyloxylation–Bromination, −Chlorination, and −Trifluoromethylation of Alkenes

Abstract

Given the versatility and value of the structurally diverse organohalides and CF₃-containing compounds in organic synthesis, we reported a green, oxidant-free electrochemical method using undivided electrochemical cells for radical bromination, chlorination and trifluoromethylation-formyloxylation of the various alkenes with readily available halogen radical (NaCl, NaBr), trifluoromethyl radical (CF₃SO₂Na) sources, and DMF as formyloxylation reagents. The protocol is operationally simple and robust and the Cl^-, Br^- or CF₃^- was directly oxidized at the anode, obviating the need for exogenous chemical oxidants.