1: With [bis(acetoxy)iodo]benzene; iodine in 1,2-dichloro-ethane T=60 - 70°C; 2 h; 2: With potassium carbonate in N,N-dimethyl-formamide T=120 - 130°C; 4 h;

[bis(acetoxy)iodo]benzene; iodine in 1,2-dichloro-ethane T=60 - 70°C; 2 h;