Nickel-Catalyzed Direct Fluorosulfonylation of Vinyl Bromides and Benzyl Bromides for Sulfonyl Fluorides.

An efficient nickel-catalyzed direct fluorosulfonylation of vinyl bromides and benzyl bromides under mild reaction conditions has been developed for sulfonyl fluorides utilizing Na2S2O4 and NFSI as the sulfur dioxide and fluorine sources, respectively. This reaction system tolerates organic bromide compounds, such as β-styryl bromides, alkyl vinyl bromides, and benzyl bromides, to achieve corresponding sulfonyl fluorides in moderate to good yields, with convenient operation, mild conditions, broad substrate scope, good functional group compatibility, and excellent retention of configuration to vinyl bromides.