反应详情

To the solution of the compound (6.64 g, 25.16 mmol) obtained in Step 1 in DMF (90 ml), potassium carbonate (7.65 g, 55.35 mmol) and methyl thioglycolate (2.7 ml, 30.19 mmol) were added in that order, and then the reaction mixture was heated at reflux with stirring for 6 hours. After the termination of the reaction, the resulting reaction solution was cooled to room temperature, extracted with ethyl acetate, and then washed with water and brine. Subsequently, the reaction solution was dried over MgSO4, and then filtered. The filtrate was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (hexane:ethyl acetate=40:1), thus obtaining the title compound as a white solid (5.72 g, 21.09 mmol, 84%).

1. temperaturethe reaction mixture was heated
2. temperatureat reflux
3. customAfter the termination of the reaction
4. customthe resulting reaction solution
5. extractionextracted with ethyl acetate
6. washwashed with water and brine
7. dry with materialSubsequently, the reaction solution was dried over MgSO4
8. filtrationfiltered
9. concentrationThe filtrate was concentrated under reduced pressure
10. customthe residue was purified by silica gel column chromatography (hexane:ethyl acetate=40:1)