Fluorinated functionality: The copper‐catalyzed oxidative trifluoromethylthiolation of aryl boronicacids with TMSCF3 and elemental sulfur at room temperature is described for the first time. This reaction provides a concise and efficient method for the synthesis of aryl trifluoromethyl thioethers (ArSCF3) under mild conditions. Phen=Phenanthroline.