We have developed the iodoarene-catalyzed nucleophilic fluorination of β-dicarbonyl compounds and intramolecular aminofluorination of ω-amino-alkenes using the same reaction conditions. The key for this reaction is the in situ generation of a hypervalent iodine compound ArIF₂ by hydrogen fluoride, mCPBA and a catalytic amount of iodoarene. Preliminary trials of catalytic asymmetric nucleophilic fluorination were conducted.