1: With 2,4,6-trimethyl-pyridine; triethylsilyl trifluoromethanesulphonate in dichloromethane T=0°C; 0.5 h; Inert atmosphere; 2: With water in dichloromethane Inert atmosphere; chemoselective reaction;

[bis(acetoxy)iodo]benzene T=83 - 87°C; 1 h; microwave irradiation;

pyridinium p-toluenesulfonate in dichloromethane T=20°C;