This paper studied the fluorination reaction of p-substituted benzenesulfonimides with diluted elemental fluorine to synthesize N-fluoro-benzenesulfonimide (NFSI) analogues. Several synthetic methods were compared and we found that, for many p-substituted benzenesulfonimides, the fluorination of their sodium salts with 10% F2–N2 mixed gas in acetonitrile at room temperature could afford NFSI analogues in moderate to good yields.
[de Oliveira Baptista,M.J.V.; Widdowson,D.A. Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1978 , p. 295 - 298]