反应详情

To a solution of ethyl 3-(4-fluorophenyl)-3-oxo-2-((4-(trifluoromethyl)phenyl)methyl)propionate (6 g, 16.3 mmol) in methanol (100 ml) was added sodium borohydride (640 mg, 16.9 mmol) under ice-cooling, and the mixture was stirred for 20 min. The reaction solution was poured into 1N hydrochloric acid (50 ml), and extracted with ethyl acetate (100 ml×2). The extract was washed with water and saturated brine, dried over anhydrous magnesium sulfate and evaporated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate=4:1) to give ethyl (2RS,3SR)-3-(4-fluorophenyl)-3-hydroxy-2-((4-(trifluoromethyl)phenyl)methyl)propionate (5.1 g, 84%) as a colorless oil.

1. temperaturecooling
2. extractionextracted with ethyl acetate (100 ml×2)
3. washThe extract was washed with water and saturated brine
4. dry with materialdried over anhydrous magnesium sulfate
5. customevaporated under reduced pressure
6. customThe residue was purified by silica gel column chromatography (hexane:ethyl acetate=4:1)