Synthesis of aryl sulfonyl fluorides from aryl sulfonyl chlorides using sulfuryl fluoride (SO2F2) as fluoride provider

A highly efficient method for the synthesis of aryl sulfonyl fluorides was developed from aryl sulfonyl chlorides using SO2F2 as fluoride source in up to 98% isolated yield under mild conditions. Gram scale experiments were also conducted, revealing the good practicality of this new protocol.