反应详情

A solution of ethyl 3-(2,6-difluoro-4-methoxyphenyl)propanoate (1.17 g, 4.79 mmol), aluminum chloride (1.9 g, 14.2 mmol) and 1-octanethiol (1.7 mL, 9.80 mmol) in dichloromethane (20 mL) was stirred for 4 hr while raising the temperature from under ice-cooling to room temperature. The reaction mixture was poured into ice water, and the mixture was stirred for 1 hr. The mixture was extracted with dichloromethane. The extract washed with aqueous sodium chloride solution, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was subjected to silica gel column chromatography (ethyl acetate:hexane=1:10-1:5) to give the title compound (1.0 g, yield 91%) as a colorless oil. MS: m/z 231 (MH+).

1. temperaturewhile raising the temperature from under ice-
2. extractionThe mixture was extracted with dichloromethane
3. washThe extract washed with aqueous sodium chloride solution
4. dry with materialdried over anhydrous magnesium sulfate
5. concentrationconcentrated under reduced pressure