反应详情

A solution of 6-bromoisoquinoline (416 mg, 2 mmol) in tetrahydrofuran (8 mL) was added dropwise into n-butyl lithium (1.6 M in hexane, 1.25 mL, 2 mmol) at −78° C. and the reaction was stirred for 30 minutes. A solution of the product of Example 10g (150 mg, 1 mmol) in tetrahydrofuran (2 mL) was added and the reaction was stirred at −78° C. for 1 hour and then slowly warmed to room temperature. The mixture was quenched with the addition of saturated aqueous ammonium chloride and the mixture was extracted with ethyl acetate. The organic phase was washed with saturated aqueous sodium bicarbonate, brine, dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was purified by silica gel column chromatography to afford the title compound (167.3 mg, Yield: 63%). 1H NMR (400 MHz, CDCl3) δ 9.22 (s, 1H), 8.52 (d, J=6.0 Hz, 2H), 7.96 (d, J=8.8 Hz, 2H), 7.49 (d, J=8.4 Hz, 1H), 5.49 (s, 1H), 5.32 (d, J=15.2 Hz, 1H), 1.63-1.44 (m, 4H), 1.21 (s, 3H), 1.01 (s, 3H), 0.97 (s, 3H), 0.91 (s, 3H) ppm.

1. stirringthe reaction was stirred at −78° C. for 1 hour
2. customThe mixture was quenched with the addition of saturated aqueous ammonium chloride
3. extractionthe mixture was extracted with ethyl acetate
4. washThe organic phase was washed with saturated aqueous sodium bicarbonate, brine
5. dry with materialdried over anhydrous sodium sulfate
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by silica gel column chromatography