1: 3-acetylbenzenediazonium tetrafluoroborate With copper(I) isothiocyanate; sodium isothiocyanate; caesium carbonate in acetonitrile T=20°C; 0.166667 h; Inert atmosphere; 2: (trifluoromethyl)-trimethylsilane in acetonitrile T=20°C; 16 h;

in diethyl ether T=-78 - 20°C;