反应详情

To 3-hydroxy-4-methoxyphenylacetic acid (5.0 g, 23.8 mmol) in EtOH (100 mL) was added sulfuric acid (1 mL), and the reaction was stirred overnight at room temperature. Once no starting material was seen by analytical tlc, the mixture was concentrated to give the desired product.

1. concentrationthe mixture was concentrated