反应详情

温度

80 °C

9.40 g of N-[2-(4-benzyloxy-3-methoxyphenyl)ethyl]-3-difluoromethoxy-2-(4-methylphenyl)acrylamide (20.1 mmol), 3.72 g (22.1 mmol) of 48% hydrobromic acid and 95 ml of acetic acid were mixed and stirred at 80° C. for 1.5 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 4.55 g of 3-difluoromethoxy-N-[2-(4-hydroxy-3-methoxyphenyl)ethyl]-2-(4-methylphenyl)acrylamide (the present compound 1452).

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