反应详情

温度

50 °C

To a solution of-3-(4-benzyloxy-3-methoxy-phenyl)-propionic acid benzyl ester (11.03 g, 29.30 mmol), in MeOH (110 ml) and dioxane (145 ml), was added dropwise aqueous NaOH 2N (139 ml, 278 mmol). The resulting yellow homogeneous mixture was then stirred at 50° C. for 17 h. The reaction mixture was then concentrated in vacuo and washed with Et2O (100 ml). The aqueous phase was acidified (pH=1) with HCl 2N and extracted three times with CH2Cl2. The combined organic phases were dried over anhydrous MgSO4, filtered and concentrated to give the title carboxylic acid (8.4 g, 29.30 mmol, 100%) as a colorless solid.

1. concentrationThe reaction mixture was then concentrated in vacuo
2. washwashed with Et2O (100 ml)
3. extractionextracted three times with CH2Cl2
4. dry with materialThe combined organic phases were dried over anhydrous MgSO4
5. filtrationfiltered
6. concentrationconcentrated