反应详情

温度

60 °C

To a solution of 3-ethoxy-6-hydroxy-2-methylbenzoic acid (114d, 0.168 g, 0.856 mmol) in THF (4.0 mL) was added 1,1′-carbonyldiimidazole (0.155 g, 0.91 mmol), and the reaction was stirred at 60° C. for 3 hours. The reaction mixture was allowed to cool to room temperature, and 2-({[2-(benzyloxy)-4,6-dimethylpyridin-3-yl]methyl}amino)ethanol (Cpd KK, 330 mg, 1.10 mmol) was added. Heating was then continued at 60° C. for 16 hour. The reaction mixture was cooled to room temperature, and 10M NaOH (0.3 mL) was added. The reaction mixture was stirred at room temperature for 1 hour and was then poured into ethyl acetate and washed with 1M KH2PO4 and water. The organic layer was concentrated and purified by column chromatography (0-80% ethyl acetate/dichloromethane) to give N-{[2-(benzyloxy)-4,6-dimethylpyridin-3-yl]methyl}-3-ethoxy-6-hydroxy-N-(2-hydroxyethyl)-2-methylbenzamide (114e, 0.274 g, 69% yield) as a white solid.

1. temperatureto cool to room temperature
2. temperatureHeating
3. waitwas then continued at 60° C. for 16 hour
4. temperatureThe reaction mixture was cooled to room temperature
5. stirringThe reaction mixture was stirred at room temperature for 1 hour
6. washwashed with 1M KH2PO4 and water
7. concentrationThe organic layer was concentrated
8. custompurified by column chromatography (0-80% ethyl acetate/dichloromethane)