Gold(I)-Catalyzed Aminohalogenation of Fluorinated<i>N</i>′-Aryl-<i>N</i>-Propargyl Amidines for the Synthesis of Imidazole Derivatives under Mild Conditions
A procedure for the synthesis of fluorinated imidazolederivatives from propargyl amidines has been developed. Undergold(I) catalysis, propargyl amidines were converted into 5‐fluoromethyl imidazoles in the presence of Selectfluor through a cascade cyclization/fluorination process. In contrast, imidazole‐5‐carbaldehydes were obtained in high yields when N‐iodosuccinimide (NIS) was used as the halogenating