反应详情

A 3N aqueous sodium hydroxide solution (0.33 ml, 0.33 mmol) was added to a solution of tert-butyl 2-hydroxy-6-[({4′-[(methoxycarbonyl)methyl]-1,1′-biphenyl-4-yl}oxy)methyl]-3-(trifluoromethyl)benzoate (467 mg, 0.90 mmol) obtained in Example (6-9) in tetrahydrofuran (8 ml), and the mixture was stirred at room temperature for 10 hours. After the reaction mixture was poured into 1N hydrochloric acid and the mixture was extracted with ethyl acetate (three times), the organic layer was successively washed with water and a saturated aqueous NaCl solution and dried with anhydrous sodium sulfate. The solid obtained by removing the solvent under reduced pressure was reprecipitated using n-hexane-ethyl acetate to give the title compound as a white powder (372 mg, yield: 82%).

1. extractionthe mixture was extracted with ethyl acetate (three times)
2. washthe organic layer was successively washed with water
3. dry with materiala saturated aqueous NaCl solution and dried with anhydrous sodium sulfate
4. customThe solid obtained
5. customby removing the solvent under reduced pressure
6. customwas reprecipitated