Electrochemical Ruthenium‐Catalysed Directed C–H Functionalization of Arenes with Boron Reagents

Ortho‐directed electrochemical C–H functionalization of aromatics with boron‐based coupling partners has been achieved under ruthenium catalysis through an oxidatively induced reductive elimination mechanism. Our method provides a single set of conditions delivering C‐H arylation, alkenylation and methylation, yielding ortho‐functionalized products with good functional group tolerance, including examples of late‐stage functionalization in synthetically useful yields. By harnessing electricity as a ‘green’ oxidant, this method circumvents the need for stoichiometric quantities of chemical oxidants, enhancing our sustainability metrics.