反应详情

温度

50 °C

To a solution of (S)-tert-butoxycarbonylamino-(4-hydroxy-phenyl)-acetic acid (32.03 g, 120 mmol) in DMF (300 ml) was added potassium carbonate (35 g, 252 mmol) and benzylbromide (30 ml, 252 mmol). The reaction mixture was stirred at 50° C. under a nitrogen atmosphere for 17 h. The mixture was poured into water (1l) and extracted with EtOAc (3×600 ml). The combined organic extracts were washed with water (3×600 ml), brine (600 ml), dried over magnesium sulfate, filtered and evaporated in vacuo to yield a yellow oil (49.4 g, 92%). LCMS purity 100%, m/z 470 [M++Na]+.

1. extractionextracted with EtOAc (3×600 ml)
2. washThe combined organic extracts were washed with water (3×600 ml), brine (600 ml)
3. dry with materialdried over magnesium sulfate
4. filtrationfiltered
5. customevaporated in vacuo