Metal-free Electrochemical Desulfurative Borylation of Thioethers

Herein, we present an electrochemical desulfurative protocol for the formation of alkyl boronic esters from thioethers. The paired electrolytic transformation utilizes HBpin as coupling partner and proceeds with inert electrodes. The transformation features mild conditions, broad substrate scope and excellent functional group tolerance, as illustrated by late-stage functionalization of pharmaceutical compounds and natural products. Furthermore, the protocol is scalable, successfully producing gram quantities of borylated product.