反应详情

After adding 60 ml of trifluoroacetic acid to a solution of 30.9 g (84.3 mmol) of the obtained 3-(4-methanesulfonyl-phenoxy)-5-methoxymethoxy-benzoic acid methyl ester in methylene chloride (100 ml) while cooling on ice, the reaction mixture was stirred at room temperature for 4 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=1:1) to obtain 15.2 g of 5-hydroxy-3-(4-methanesulfonyl-phenoxy)benzoic acid methyl ester (yield: 56%) as a white solid.

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