反应详情

温度

75 °C

A solution of 2-bromo-5-methoxy-1,3-dimethyl-benzene ((Example 192: step a) 1.01 g, 4.70 mmol) in CCl4 (50 mL) was treated with N-bromosuccinamide and AIBN (catalytic amount) and heated to 75° C. 3.5 h. The reaction was diluted with CH2Cl2 and washed with saturated aqueous NaHCO3. The organic layer was dried over MgSO4 and concentrated in vacuo to afford the product 2-bromo-1-bromomethyl-5-methoxy-3-methyl-benzene (1.27 g, 92%) as a pale orange solid. 1H NMR (CDCl3): δ 6.641 (s, 2H), 4.601 (s, 2H), 3.760 (s, 3H), 2.380 (s, 3H).

1. custom3.5 h
2. washwashed with saturated aqueous NaHCO3
3. dry with materialThe organic layer was dried over MgSO4
4. concentrationconcentrated in vacuo