1: 3,5-bis(trifluoromethyl)phenyl bromide With isopropylmagnesium chloride in tetrahydrofuran T=0°C; 3 h; Inert atmosphereGloveboxSchlenk technique; 2: DPPMCl4 in tetrahydrofuran; diethyl ether T=0 - 20°C; 12 h; Inert atmosphereGloveboxSchlenk technique;