1: carbonic difluoride With potassium fluoride in diethylene glycol dimethyl ether T=5°C; 2 h; Autoclave; 2: perfluoroallylfluorosulphate in diethylene glycol dimethyl ether T=5 - 20°C; P=5320.36 Torr; 5 h; Autoclave;

Multistep reaction;