1: 2,3,3,3-tetrafluoro-2-(pentafluorophenoxy)propionyl fluoride With potassium fluoride in 1.4-dicyano 1-butene; bis [2-(2-methoxyethoxy)ethyl] ether 0.5 h; 2: hexafluorocyclopropylene oxide in 1.4-dicyano 1-butene; bis [2-(2-methoxyethoxy)ethyl] ether T=25 - 29°C; Product distribution / selectivity;

1: 2,3,3,3-tetrafluoro-2-(pentafluorophenoxy)propionyl fluoride With potassium fluoride in 1.4-dicyano 1-butene; bis [2-(2-methoxyethoxy)ethyl] ether 0.5 h; 2: hexafluorocyclopropylene oxide in 1.4-dicyano 1-butene; bis [2-(2-methoxyethoxy)ethyl] ether T=25 - 29°C; Product distribution / selectivity;