反应详情

To an ice-cold solution of N,N′-bis(t-butoxy-carbonyl)-2-hydroxy-N,N′-dimethyl-1,3-propanediamine (87.0 mg, 0.27 mmol) in tetrahydrofuran (4.0 mL) were added benzyl bromide (230.0 mg, 1.35 mmol) and a 50% dispersion of sodium hydride in mineral oil (35.0 mg, 0.81 mmol). The reaction mixture was stirred at room temperature for 15 hours and concentrated under reduced pressure. Water was added to the residue, and the mixture was extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel to yield 2-benzyloxy-N,N′-bis(t-butoxycarbonyl)-N,N′-dimethyl-1,3-propanediamine, obtained as a colorless oil (54.0 mg, yield: 49%).

1. concentrationconcentrated under reduced pressure
2. additionWater was added to the residue
3. extractionthe mixture was extracted with ethyl acetate
4. washThe organic layer was washed with brine
5. dry with materialdried over anhydrous sodium sulfate
6. concentrationconcentrated under reduced pressure
7. customThe residue was purified by column chromatography on silica gel