Electrochemically Driven Deoxygenative Borylation of Alcohols and Carbonyl Compounds

We present a new, unified approach for the transformationof benzylicand allylic alcohols, aldehydes, and ketones into boronic esters underelectroreductive conditions. Key to our strategy is the use of readilyavailable pinacolborane, which serves both as an activator and anelectrophile by first generating a redox-active trialkylborate speciesand then delivering the desired deoxygenatively borylated product.This strategy is applicable to a variety of substrates and can beemployed for the late-stage functionalization of complex molecules.