1: 1-bromo-2,4,6-trifluoro-benzene With isopropylmagnesium chloride in tetrahydrofuran T=20 - 54°C; 2: diethyl 2-oxo-1,3-propanedioate in tetrahydrofuran T=-55°C; 0.666667 h;

phosphorus pentachloride; trichlorophosphate T=25°C;