pyridine; 1,3-dibromo-5,5-dimethyl-hydantoin; hydrogen fluoride

N-(1,1,2,3,3,3-hexafluoropropyl)-diethylamine in diethyl ether 6 h; Ambient temperature;

N-bromosuccinmide; triethylamine tris(hydrogen fluoride) in dichloromethane 1.) 0 deg C, 15 min, 2.) r.t., 5 h; Yield given. Yields of byproduct given. Title compound not separated from byproducts;