bis-(trifluoroacetoxy)-iodo-benzene in water; acetonitrile 3 h;

With  trifluoroacetic acid in  dichloromethane T=0 - 20°C; 3 h;   

Multi-step reaction with 2 steps 1: 82 percent / N-hydroxysuccinimide, N,N'-dicyclohexylcarbodiimide, NH3 / tetrahydrofuran / Ambient temperature2: 46 percent / TFA / CH2Cl2 / 3 h / 0 - 20 °C  

Multi-step reaction with 3 steps 1: 80 percent / 1N aq. NaOH / ethanol / 2 h / Ambient temperature2: 82 percent / N-hydroxysuccinimide, N,N'-dicyclohexylcarbodiimide, NH3 / tetrahydrofuran / Ambient temperature3: 46 percent / TFA / CH2Cl2 / 3 h / 0 - 20 °C