Hydrochloric Acid → [2-Ethyl-5-(trifluoromethyl)phenyl]boronic acid

関与物質

反応手順

i-Propylmagnesium chloride (2M sol. in THF, 5.81 mL, 11.6 mmol) was added drop wise to a cooled (−30° C.) solution of 2-iodo-1-ethyl-4-(trifluoromethyl)benzene (3.48 g, 11.6 mmol) in dry THF (30 mL) and the reaction mixture was stirred at the same temperature for 30 min, under argon. After this time, trimethylborate (2.6 mL, 23.2 mmol) was added drop wise and the reaction mixture was stirred at the same temperature for 1.5 h. HCl (1 M, 10 mL) was added and the reaction mixture extracted with EtOAc (3×40 mL). The combined organic layers were dried over sodium sulfate and the solvent was evaporated to obtain the title compound as a white solid, crystallized from hexane (2.46 g, 97%).

情報源と証拠