4-Hydroxybenzoic Acid → 4-(Benzyloxy)benzoic acid

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Reaction Steps

To a solution of 4-hydroxybenzoic acid (6.9 g, 50 mmole) in 150 ml DMF was added potassium tert.-butoxide (12.34 g, 110 mmole) and the mixture was stirred at room temperature for one hour. Benzyl bromide (20.5 g, 120 mmole) was added and the mixture was stirred for two days at room temperature. The mixture was evaporated under reduced pressure and 100 ml 1,4-dioxane and a solution of sodium hydroxide (6.0 g, 150 mmole)in 50 ml water was added. The mixture was refluxed for two hours, cooled and evaporated under reduced pressure. Water was added and the mixture was acidified with acetic acid. The product was filtered, washed with cold water and dried. Yield: 10.2 g=89%.

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