反应详情

4-Hydroxy-3-methyl-benzofuran-2-carboxylic acid tert-butyl ester (Example 156, Step 2) was dissolved in a 40% TFA/methylene chloride solution at room temperature for 4 hours. 4-Hydroxy-3-methyl-benzofuran-2-carboxylic acid was isolated as a white powder by evaporation of the solvent.