1: N-fluoro-2,6-dichloropyridinium tetrafluoroborate / acetonitrile / Heating 2: aq. HCl / acetonitrile View Scheme

hydrogenchloride; sodium carbonate; N-fluorobislt;(trifluoromethyl)sulfonylgt;imide 1.) CH2Cl2, room temp., 5 h, 2.) CH2Cl2; Yield given. Multistep reaction. Yields of byproduct given;