DMSO‐Assisted K3PO4‐Catalyzed Cooperative Metal‐Free, Base‐Free Etherification of Chloroheteroarenes at Low Temperature

Abstract Etherification of chloroheteroarenes was performed at low temperatures under metal‐free, ligand‐free and base‐free conditions, that is, the reaction is promoted by the cooperative effect of DMSO (solvent) as a promoter and K 3 PO 4 providing the catalytic surface (rather than a base). The protocol exhibits good substrate scope under mild reaction conditions and has also been explored mechanistically.