反应详情

A solution of dimethyl-5-methoxy-isophthalate (2.5 g, 11.1 mmol) in tetrahydrofuran/methanol (56 mL/20 mL) was treated with 2.0 N sodium hydroxide (12 mL, 25 mmol). The reaction was left stirring for 15 hours at room temperature. After the solution was concentrated, the solid was dissolved in water and acidified with 2.0 N hydrogen chloride. Ethyl acetate was used to extract the precipitate, which was then washed with brine and dried over anhydrous sodium sulphate. After removal of solvent in vacuo, a total of 2.5 g (quantitative) of 5-methoxyisophthalic acid was isolated.

1. waitThe reaction was left
2. concentrationAfter the solution was concentrated
3. dissolutionthe solid was dissolved in water
4. extractionto extract the precipitate, which
5. washwas then washed with brine
6. dry with materialdried over anhydrous sodium sulphate
7. customAfter removal of solvent in vacuo