反应详情

3.1 ml of n-butyl lithium (2.66 M hexane solution) was dropwise added to a tetrahydrofuran (100 ml) solution of 1.1 g of N-(4-bromo-3-fluorophenyl)pyridine-2-carboxamide at −78° C., and the reaction liquid was stirred at the same temperature for 15 minutes. 1.21 g of 3-((t-butyl(dimethyl)silyl)oxy)dihydrofuran-2 (3H)-one was added to the reaction liquid, and the reaction liquid was stirred at the same temperature for 1 hour. Aqueous saturated sodium bicarbonate solution was added to the reaction liquid at the same temperature, then heated up to room temperature and extracted with ethyl acetate. The organic layer was dried with anhydrous sodium sulfate, the solvent was evaporated away under reduced pressure, and the resulting residue was purified through silica gel column chromatography (developing solvent: chloroform/methanol=100/1) to obtain the entitled compound as a colorless oily substance.

1. customthe reaction liquid
2. customthe reaction liquid
3. stirringwas stirred at the same temperature for 1 hour
4. extractionextracted with ethyl acetate
5. dry with materialThe organic layer was dried with anhydrous sodium sulfate
6. customthe solvent was evaporated away under reduced pressure
7. customthe resulting residue was purified through silica gel column chromatography (developing solvent: chloroform/methanol=100/1)
8. customto obtain the entitled compound as a colorless oily substance