反应详情

To a stirred suspension of 4-(2-(tert-butoxycarbonylamino)ethyl)benzyl methanesulfonate (0.33 g, 1.0 mmol) and N,N-diisopropylethylamine (0.19 mL, 1.1 mmol) in tetrahydrofuran (50 mL) was added a 2M solution of dimethylamine in tetrahydrofuran (5.0 mL, 10 mmol). The resulting mixture was stirred in an oil bath set to 60° C. for 6 hours. The solution was cooled to ambient temperature and concentrated. The residue was partitioned between ethyl acetate (20 mL) and water (10 mL). The organic layer was dried over sodium sulfate and concentrated. The residue was purified by chromatography on silica gel, eluting with 99/1 to 98/2 chloroform/(90/10 methanol/concentrated ammonium hydroxide), to afford tert-butyl 4-((dimethylamino)methyl)phenethylcarbamate as a colorless oil (0.15 g, 54% yield).

1. concentrationconcentrated
2. customThe residue was partitioned between ethyl acetate (20 mL) and water (10 mL)
3. dry with materialThe organic layer was dried over sodium sulfate
4. concentrationconcentrated
5. customThe residue was purified by chromatography on silica gel
6. washeluting with 99/1 to 98/2 chloroform/(90/10 methanol/concentrated ammonium hydroxide)