反应详情

To a solution of ethyl(2RS,3RS)-3-hydroxy-3-(4-phenoxyphenyl)-2-((4-(trifluoromethyl)phenyl)methyl)propionate (11.8 g, 26.6 mmol) in methanol (40 ml) was added 2N aqueous sodium hydroxide solution (26.6 ml, 53.2 mmol), and the mixture was stirred at room temperature for 4 hrs. The reaction solution was acidified with 1N hydrochloric acid and extracted with ethyl acetate (200 ml×2). The extract was washed with water and saturated brine, dried over anhydrous magnesium sulfate and evaporated under reduced pressure. The residue was recrystallized from ethyl acetate-hexane to give (2RS,3RS)-3-hydroxy-3-(4-phenoxyphenyl)-2-((4-(trifluoromethyl)phenyl)methyl)propionic acid (9.0 g, 81%).

1. extractionextracted with ethyl acetate (200 ml×2)
2. washThe extract was washed with water and saturated brine
3. dry with materialdried over anhydrous magnesium sulfate
4. customevaporated under reduced pressure
5. customThe residue was recrystallized from ethyl acetate-hexane