反应详情

4-Ethoxycarbonylpiperidine (1.572 g, 10.0 mmol) was dissolved in tetrahydrofuran (50 ml); triethylamine (2.79 ml, 20.0 mmol) and benzyl chlorocarbonate (1.71 ml, 12.0 mmol) were added dropwise while cooled with an ice water bath; and the reaction mixture was stirred at room temperature overnight. The reaction mixture was partitioned between ethyl acetate and the saturated aqueous solution of sodium hydrogencarbonate. The organic layer was washed with brine and dried over anhydrous sodium sulfate. The solvent was distilled off, and the residue was purified by silica gel column chromatography (eluent; ethyl acetate:hexane=1:3) to yield the title compound (2.315 g, 7.95 mmol, 79.5%) as a colorless oil.

1. temperaturewhile cooled with an ice water bath
2. customThe reaction mixture was partitioned between ethyl acetate
3. washThe organic layer was washed with brine
4. dry with materialdried over anhydrous sodium sulfate
5. distillationThe solvent was distilled off
6. customthe residue was purified by silica gel column chromatography (eluent; ethyl acetate:hexane=1:3)