2‐Fluoro‐5‐nitrophenyldiazonium: A Novel Sanger‐Type Reagent for the Versatile Functionalization of Alcohols

As a novel Sanger-type reagent, 2-fluoro-5-nitrophenyldiazonium tetrafluoroborate enabled the versatile functionalization of primary and secondary aliphatic alcohols. Based on mild nucleophilic aromatic substitution fluorine atom under unprecedented, base-free conditions, diazonium unit core resulting aryl-alkyl ether could be employed for such diverse transformations as radical C-H activation cyclization, well palladium catalyzed cross-coupling reactions.