反应详情

1,3-Dimethoxy-2-(tol-2-yl)-benzene 1, (10 g, 43.86 mmol), N-bromosuccinimide (8.26 g, 46.4 mmol), and perchloric acid (70%, 0.5 ml) were mixed in dichloromethane (200 ml) and stirred for 4 hrs at room temperature. The reaction mixture was quenched with sodium bicarbonate solution (5%, 100 ml), the dichloromethane layer was washed with water (100 ml), brine (100 ml), and the solvent was removed. The crude product was purified by silica-gel chromatography eluting with hexane and ethyl acetate (0% to 10% ethyl acetate) yielding 10.8 g (80%) of 2.

1. customThe reaction mixture was quenched with sodium bicarbonate solution (5%, 100 ml)
2. washthe dichloromethane layer was washed with water (100 ml), brine (100 ml)
3. customthe solvent was removed
4. customThe crude product was purified by silica-gel chromatography
5. washeluting with hexane and ethyl acetate (0% to 10% ethyl acetate)