反应详情

温度

80 °C

A solution of 2-(tert-butoxycarbonylamino)-2-(4-chlorophenyl)ethyl methanesulfonate (Intermediate 23) (535 mg, 1.53 mmol) in DMF (8 mL) was treated with sodium azide (199 mg, 3.06 mmol) and the mixture was heated at 80° C. for 1 hour. The mixture was cooled and allowed to stir at room temperature overnight. The solution was partitioned between ethyl acetate and water. The organic layer was washed twice with water then dried with magnesium sulfate, filtered and concentrated until the final volume was approximately 5 mL. Ethanol (20 mL) and 10% palladium on carbon (75 mg, 0.07 mmol) were added. The resulting suspension was stirred under an atmosphere of hydrogen at ambient pressure and temperature for 1 hour. The mixture was filtered and the filtrate was concentrated under reduced pressure to give tert-butyl 2-amino-1-(4-chlorophenyl)ethylcarbamate as a gum (410 mg, 99%).

1. temperatureThe mixture was cooled
2. customThe solution was partitioned between ethyl acetate and water
3. washThe organic layer was washed twice with water
4. dry with materialthen dried with magnesium sulfate
5. filtrationfiltered
6. concentrationconcentrated until the final volume
7. stirringThe resulting suspension was stirred under an atmosphere of hydrogen at ambient pressure and temperature for 1 hour
8. filtrationThe mixture was filtered
9. concentrationthe filtrate was concentrated under reduced pressure