反应详情

温度

50 °C

CDI (2.40 g, 14.79 mmol) was added to a solution of salicylic acid (2.02 g, 14.62 mmol) in DMF (20 mL). The reaction mixture was stirred at 50° C. for 30 min and tert-butyl alcohol (2.80 mL, 29.84 mmol) and DBU (4.4 mL, 29.45 mmol) were dropwise added. The reaction mixture was stirred at 50° C. for 16 h and allowed to reach r.t. It was poured into NaHCO3 (100 mL, saturated aqueous solution) and extracted with EtOAc (70 mL). The organic layer was dried over Na2SO4 (anhydrous), filtered and concentrated. The crude residue was flash chromatographed on SiO2 (5% EtOAc/hexanes) to furnish 2.089 g of tert-butyl 2-hydroxybenzoate (colourless oil, yield: 73%).

1. stirringThe reaction mixture was stirred at 50° C. for 16 h
2. customto reach r.t
3. extractionextracted with EtOAc (70 mL)
4. dry with materialThe organic layer was dried over Na2SO4 (anhydrous)
5. filtrationfiltered
6. concentrationconcentrated
7. customchromatographed on SiO2 (5% EtOAc/hexanes)