反应详情

To a stirred suspension of (methyl)triphenylphosphonium bromide (2000 mg, 5.60 mmol) in dry THF (15 ml) was added a solution of potassium t-butoxide (628 mg, 5.60 mmol) in dry THF (10 ml) at ice-cooling. After 2 hours at room temperature, to this was added a solution of 1-(6-bromoquinolin-2-yl)ethanone (700 mg, 2.80 mmol) in dry THF (15 ml) at ice-cooling. After 3 hours at ambient temperature, the mixture was quenched with water and extracted with ethyl acetate (×2). The combined solution was washed with brine, dried over sodium sulfate and concentrated in vacuo to give crude product, which was purified by column chromatography on silica gel (250 g) with hexane-ethyl acetate (10:1) to furnish the title compound (661 mg, 95%) as a tan solid. 1H NMR (270 MH CDCl3) δ ppm 2.34 (3H, s), 5.50 (1H, s), 5.93 (1H, s), 7.65-7.78 (2H, m), 7.88-8.03 (3H, m). MS (ESI): m/z 248.11, 250.14 (M+H)+.

1. temperaturecooling
2. temperaturecooling
3. waitAfter 3 hours at ambient temperature
4. customthe mixture was quenched with water
5. extractionextracted with ethyl acetate (×2)
6. washThe combined solution was washed with brine
7. dry with materialdried over sodium sulfate
8. concentrationconcentrated in vacuo
9. customto give crude product, which
10. customwas purified by column chromatography on silica gel (250 g) with hexane-ethyl acetate (10:1)