Metal free electrophilic fluoro-cyclization of unsaturated N-hydroxy- and N-acetoxyamides with N-F reagents

Metal-free electrophilic fluoro-cyclizations unsaturated N-hydroxy- and N-acetoxyamides under action of the 1-chloromethyl-4-fluoro-1,4-diazoniabicyclo[2 2 2]octane bis(tetrafluoro-borate) (F-TEDA-BF4) and F-TEDA-FAP (FAP = [(C2F5)3PF3]−) were studied in organic solvents and ionic liquid 1-ethyl-3-methylimidazolium triflate.