反应详情

4.17 g (10.00 mmol) of N-[2-(4-benzyloxy-3-methoxyphenyl)ethyl]-3-hydroxy-2-(4-methylphenyl)acrylamide, 22.4 g (40.0 mmol) of 10% aqueous potassium hydroxide solution, 1.62 g (5.00 mmol) of tetrabutylammonium bromide and 50 ml of ethylene glycol dimethyl ether were mixed and chlorodifluoromethane gas was blown thereto at room temperature. After a sample was taken out from the reaction mixture and the disappearance of the starting material was confirmed by thin layer chromatography, 5% hydrochloric acid was added to the reaction mixture, which was followed by extracted with ethyl acetate, washed with 5% hydrochrolic acid, saturated aqueous sodium bicarbonate solution and saturated brine subsequently, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was washed with diethyl ether to give 3.46 g of N-[2-(4-benzyloxy-3-methoxyphenyl)ethyl]-3-difluoromethoxy-2-(4-methylphenyl)acrylamide (the present compound 1451).

1. customat room temperature
2. additionwas added to the reaction mixture, which
3. extractionby extracted with ethyl acetate
4. washwashed with 5% hydrochrolic acid, saturated aqueous sodium bicarbonate solution and saturated brine subsequently
5. dry with materialdried over anhydrous magnesium sulfate
6. concentrationconcentrated under reduced pressure
7. washThe residue was washed with diethyl ether