反应详情

温度

0 °C

Carbon tetrabromide (663 mg) was added to a stirred solution of 1-bromomethyl-3-hydroxymethyl-5-methoxy-benzene (420 mg) in anhydrous dichloromethane (10 mL) under argon. After cooling the resulting solution at 0° C., a solution of triphenylphosphine (500 mg) in anhydrous dichloromethane (10 mL) was added dropwise. The reaction mixture was stirred at room temperature for 20 h and then concentrated in vacuo to a residue. The residue was purified by silica gel chromatography (Merck SuperVarioFlash 30 g column, Si60 15-40 μm, eluted with dichloromethane/heptane, 40:60) to give 1,3-bis-bromomethyl-5-methoxy-benzene (170 mg):

1. concentrationconcentrated in vacuo to a residue
2. customThe residue was purified by silica gel chromatography (Merck SuperVarioFlash 30 g column, Si60 15-40 μm, eluted with dichloromethane/heptane, 40:60)