1: With [bis(acetoxy)iodo]benzene; iodine in 1,2-dichloro-ethane T=20°C; 1 h; 2: 4-fluoro-benzoic acid With palladium diacetate; [14C]-Tetramethylammonium bromide in 1,2-dichloro-ethane T=100°C; 24 h;