Trimethylaluminum → 6-Bromo-2-(2,2,2-trifluoro-1,1-dimethylethyl)quinoline

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To a suspension of 1-(6-bromoquinolin-2-yl)-2,2,2-trifluoro-1-methylethyl methanesulfonate (1.40 g, 3.52 mmol) in cyclohexane (14 ml) was added trimethylaluminum (14 ml, 14 mmol, 1.03M in hexane solution) at room temperature, and the mixture was stirred at room temperature for 16 hours. The reaction was carefully quenched with saturated sodium bicarbonate aqueous solution (10 ml), brine (10 ml) and diluted with ethyl acetate (100 ml). After the mixture was stirred for 30 minutes, formed precipitate was removed by celite and washed with ethyl acetate. The filtrate was concentrated and purified through silica gel column chromatography, eluting with hexane only, to furnish the title compound (951 mg, 85% yield) as colorless oil. 1H NMR (300 MHz, CDCl3) δ 1.72 (6H, s), 7.66 (1H, d, J=8.8 Hz), 7.75-7.80 (1H, m), 7.96-8.00 (2H, m), 8.06 (1H, d, J=8.8 Hz). MS (ESI): m/z 318, 320 (M+H)+.

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