反应详情

A solution of 5-methoxyanthranilic acid (7.8 g, 46.5 mmol) was refluxed in acetic anhydride (60 mL) for 2 h15 before being cooled and concentrated under reduced pressure. The crude residue was then concentrated twice in the presence of toluene before being filtered and washed with ether to yield to the title compound (6.8 g, 77% yield) as a beige solid; LC/MS: m/z 192 [M+H]+, Rt 1.69 min.

1. temperaturebefore being cooled
2. concentrationconcentrated under reduced pressure
3. concentrationThe crude residue was then concentrated twice in the presence of toluene
4. filtrationbefore being filtered
5. washwashed with ether