Superelectrophilic Csp3-H bond fluorination of aliphatic amines in superacid: The striking role of ammonium-carbenium dications.
2020
The superacid-promoted electrophilic Csp3-H bond activation of aliphatic amines generates superelectrophilic species that can be subsequently fluorinated. Demonstrated by low-temperature in situ NMR experiments, the ammonium-carbenium dications, crucial for this reaction, can also react with C-H bonds opening future synthetic perspectives for this mode of activation.
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