反应详情

Sodium hydride (60%, 30 mg) was suspended in DMF (1 ml) and a solution of benzophenoneoxime (157 mg) in DMF (2 ml) was added dropwise thereto, followed by stirring the resulting mixture at room temperature for 1 hour. To this solution, a solution of methyl (3-(2-bromoethyl)-2-methylbenzofuran-7-yloxy)acetate (201 mg) in DMF (3 ml) was added dropwise and the solution was stirred at room temperature for 30 minutes. Acetic acid was added to this reaction solution and the resulting solution was added to water layer (50 ml) followed by extraction of the resultant twice with ethyl acetate (20 ml). The organic layers were combined and washed with saturated brine, followed by drying over sodium sulfate. After removing the sodium sulfate by filtration, the solvent was removed under reduced pressure and the residue was purified by column chromatography (solvent: hexane/ethyl acetate=5/1) using silica gel to obtain the desired compound (177 mg, yield: 65%).

1. stirringthe solution was stirred at room temperature for 30 minutes
2. extractionfollowed by extraction of the resultant twice with ethyl acetate (20 ml)
3. washwashed with saturated brine
4. dry with materialby drying over sodium sulfate
5. customAfter removing the sodium sulfate
6. filtrationby filtration
7. customthe solvent was removed under reduced pressure
8. customthe residue was purified by column chromatography (solvent: hexane/ethyl acetate=5/1)