反应详情

Tert-butyl 4-(2-bromoacetyl)piperidinecarboxylate (0.85 g, 2.8 mmol) was dissolved in tetrahydrofuran (8.5 mL), and the solution was mixed with pyrrolidine (0.46 mL, 5.6 mmol) and triethylamine (0.78 mL, 5.6 mmol) with stirring at room temperature, followed by stirring for twenty-four hours. The reaction mixture was mixed with diluted hydrochloric acid (0.5 mol/L, 27 mL) and washed with ethyl acetate. The aqueous layer was adjusted to be basic with an aqueous potassium hydroxide solution added under ice-cooling and was extracted with ethyl acetate. The organic layer was washed with brine, was dried over anhydrous sodium sulfate, and the solvent was distilled off. The residue was dried under reduced pressure and thereby yielded tert-butyl 4-(2-pyrrolidin-1-ylacetyl)piperidinecarboxylate (0.72 g, 87%).

1. stirringby stirring for twenty-four hours
2. washwashed with ethyl acetate
3. additionadded under ice-
4. temperaturecooling
5. extractionwas extracted with ethyl acetate
6. washThe organic layer was washed with brine
7. dry with materialwas dried over anhydrous sodium sulfate
8. distillationthe solvent was distilled off
9. customThe residue was dried under reduced pressure