反应详情

温度

50 °C

A mixture of (S)-{1-[3-(pyrazin-2-yloxy)-phenyl]-ethyl}-carbamic acid tert-butyl ester (1.33 g, 4.2 mmol), dioxane (20 mL) and HCl (4.2 mL, 4N) was stirred at 50° C. for 5 h and concentrated in vacuo. CH2Cl2 (50 mL) was added and the reaction mixture was basified with NaOH (5N) followed by extraction with CH2Cl2 (2×50 mL). The organic layer was washed with brine (50 mL), dried over anhydrous magnesium sulfate and filtered, and the filtrate was concentrated to give the title compound (0.77 g, 85% yield).

1. concentrationconcentrated in vacuo
2. additionCH2Cl2 (50 mL) was added
3. extractionfollowed by extraction with CH2Cl2 (2×50 mL)
4. washThe organic layer was washed with brine (50 mL)
5. dry with materialdried over anhydrous magnesium sulfate
6. filtrationfiltered
7. concentrationthe filtrate was concentrated