反应详情

3-Hydroxy-5-(2-oxo-pyrrolidin-1-yl)-benzoic acid (D36) (400 mg, 1.72 mmol, 1 equiv) was heated at reflux in a mixture of MeOH (20 ml) and concentrated H2SO4 (4 drops) for 7 h. The solution was then cooled to room temperature and concentrated in vacuo to give of 3-hydroxy-5-(2-oxo-pyrrolidin-1-yl)-benzoic acid methyl ester (D37) (300 mg, 74%) as a light brown solid.

1. concentrationconcentrated in vacuo