反应详情

After adding 30.0 ml of trifluoroacetic acid to a solution of 11.8 g (30.9 mmol) of the obtained ester compound in methylene chloride (50.0 ml), the reaction mixture was stirred at room temperature for 5 hours. The reaction mixture was concentrated under reduced pressure, and the obtained residue was purified by silica gel column chromatography (hexane:acetic acid ethyl ester=2:1) to obtain 8.86 g of 3-(6-ethanesulfonyl-pyridin-3-yloxy)-5-hydroxybenzoic acid methyl ester (yield: 85%) as a colorless oil.

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. customthe obtained residue was purified by silica gel column chromatography (hexane:acetic acid ethyl ester=2:1)