The radiochemical synthesis of [18F]4‐fluorophenols is based on phenol umpolung under oxidative conditions and direct nucleophilic fluorination with [18F]fluoride (see scheme, TBAF=tetra‐n‐butylammonium fluoride, TFA=trifluoroacetic acid). Readily available O‐unprotected 4‐tert‐butyl phenols are used as precursors in this one‐pot protocol. The reaction is completed in less than 30 minutes at room temperature