N-iodo-succinimide; n-Bu4NH2F3 in dichloromethane T=0°C; 1 h; other fluorid ion source, other solvents, other rection times, other temperature, 1,3-dibromo-5,5-dimethylhydantoin for bromofluorination;

N-iodo-succinimide; KHF2; hydrogen fluoride; tetrabutyl ammonium fluoride in dichloromethane T=0 - 20°C; 9 h;