N-Fluorobenzenesulfonimide (NFSI, 1) was first reported by Differding and coworkers in 1991 and soon became popular owing to its suitable reactivity, ready availability, and operational simplicity [1]. Prior to the development of NFSI, N-fluor-N-alkylsulfonamides 2 [2], DesMarteau’s reagent (3) [3], and perfluoro-[N-fluoro-N-(4-pyridyl)-methanesulfonamide] (4) [4] had found application in some electrophilic aromatic substitution reactions (Fig. 1). Generally, the direct fluorination of (hetero)aromatics with NFSI and its analogues is influenced by both the electrophilicity of the “F+” sources and the nucleophilicity of the electron nature of the aromatic substrates.
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Hu, J., Hu, J. (2020). NFSI and Its Analogues’ Fluorination for Preparing Aryl Fluorides. In: Hu, J., Umemoto, T. (eds) Fluorination. Synthetic Organofluorine Chemistry. Springer, Singapore. https://doi.org/10.1007/978-981-10-1855-8_52-1
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