反应详情

Methyl 4-chloro-4-oxobutyrate (0.107 mL, 0.873 mmol) was added to a solution of 6-bromo-4-hydroxy-1,1-dimethylnaphthalen-2(1H)-one (0.212 g, 0.794 mmol), TEA (0.121 mL, 0.873 mmol) in 1,2-dichloroethane (3 mL). The mixture was diluted with DCM, washed with water, washed with NaHCO3, and dried over MgSO4. The crude product was purified by flash chromatography using EtOAc/hexane to afford 7-bromo-4,4-dimethyl-3-oxo-3,4-dihydronaphthalen-1-yl methyl succinate in 85% yield. 1H-NMR (300 MHz, CDCl3) δ ppm 7.74 (1H, d, J=2.0 Hz), 7.59 (1H, dd, J=8.4, 2.1 Hz), 7.36 (1H, d, J=8.5 Hz), 6.20 (1H, s), 3.73 (3H, s), 3.01 (2H, t, J=6.0 Hz), 2.80 (2H, t, J=6.0 Hz), 1.48 (6H, s). MS m/z: 381.

1. washwashed with water
2. washwashed with NaHCO3
3. dry with materialdried over MgSO4
4. customThe crude product was purified by flash chromatography