反应详情

To a solution of 4-[(2S,3S)-3-(tert-butyldimethylsilyloxy)-2-ethyl-5-oxopyrrolidin-1-yl]-2-chlorobenzonitrile (550 mg) in tetrahydrofuran (3 mL)-methanol (3 mL) was added 6 mol/L hydrochloric acid (4 mL), and the mixture was stirred at room temperature for 72 hr. Saturated aqueous sodium hydrogen carbonate was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The extract was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent:hexane/ethyl acetate=10/1→1/3) to give the title compound as a colorless solid (yield: 93.3 mg, 24%).

1. extractionthe mixture was extracted with ethyl acetate
2. dry with materialThe extract was dried over anhydrous magnesium sulfate
3. concentrationconcentrated under reduced pressure
4. customThe residue was purified by silica gel column chromatography (eluent:hexane/ethyl acetate=10/1→1/3)