Pinacol → 2-(2-Fluoro-4-methylphenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane

Participants

Reaction Steps

To a solution of (2-fluoro-4-methylphenyl)boronic acid (500 mg, 3.24 mmol) in diethyl ether (20 mL) was added pinacol (360 mg, 3.24 mmol) and 4-toluenesulfonic acid monohydrate (30 mg, 162 μmol) and the resulting solution was stirred at room temperature for 18 hours. The reaction mixture was washed with a saturated aqueous sodium hydrogen carbonate solution (20 mL), dried over MgSO4 and concentrated in vacuo to give the title compound as a white solid, 740 mg, in a 97% yield. 1H NMR (400 MHz, CDCl3) δ ppm 1.33 (s, 12H), 2.34 (s, 3H), 6.82 (d, 1H), 6.93 (d, 1H), 7.60 (d, 1H).

Provenance & Evidence