反应详情

温度

80 °C

1.80 g (3.74 mmol) of N-[2-(4-benzyloxy-3-methoxyphenyl)-1-methylethyl]-3-difluoromethoxy-2-(4-methylphenyl)acrylamide, 693 mg (4.11 mmol) of 48% hydrobromic acid and 20 ml of acetic acid were mixed and stirred at 80° C. for 2 hours. The solvent was distilled off from the reaction mixture under reduced pressure and the residue was subjected to silica gel column chromatography (eluent, hexane:ethyl acetate=2:1) to give 1.10 g of 3-difluoromethoxy-N-[2-(4-hydroxy-3-methoxyphenyl)-1-methylethyl]-2-(4-methylphenyl)acrylamide.

1. distillationThe solvent was distilled off from the reaction mixture under reduced pressure