反应详情

A DMF (5 ml) solution of the 6-bromoquinoline-ethanone (129 mg, 0.52 mmol), (trifluoromethyl)trimethylsilane (220 mg, 1.55 mmol) and tributylammonium fluoride (13.5 mg, 0.052 mmol) was stirred at 100° C. for 2 hours. Then the mixture was cooled to room temperature and added 1M-hydrochloride aqueous solution (2 ml). After 4 hours, the mixture was quenched with saturated sodium bicarbonate aqueous solution, and the product was extracted with ethyl acetate and dried over sodium sulfate. Then, filtration, evaporation, purification through silica gel column chromatography eluting with hexane/ethyl acetate (4:1) furnished the title compound (175 mg, quant.) as a white solid. 1H NMR (300 MHz, CDCl3) ppm 1.81 (3H, s), 6.51 (1H, s), 7.64 (1H, d, J=8.1 Hz), 7.66-7.89 (1H, m), 8.00-8.12 (2H, m), 8.21 (1H, d, J=8.8 Hz). MS (ESI): m/z 320, 322 (M+H)+.

1. customthe mixture was quenched with saturated sodium bicarbonate aqueous solution
2. extractionthe product was extracted with ethyl acetate
3. dry with materialdried over sodium sulfate
4. filtrationThen, filtration, evaporation, purification through silica gel column chromatography
5. washeluting with hexane/ethyl acetate (4:1)