1: 3-fluoro-5-iodo-2-(trimethylsilyl)pyridine; isopropylmagnesium chloride in tetrahydrofuran T=0°C; 0.0833333 h; 2: carbon dioxide in tetrahydrofuran 0.333333 h; 3: With sodium hydroxide in ethanol; water 0.0833333 h; Heating;