Transition-Metal-Free Oxyfluorination of Olefinic Amides for the Synthesis of Fluorinated Heterocycles

A series of fluorinated 4H-3,1-benzoxazines and iminoisobenzofurans have been synthesized through the electrophilic fluorocyclizadon of olefinic amides. This methodology is highlighted by its mild conditions, wide substrate scope, and good functional group tolerance.