Sodium Iodide → 3-Hydroxy-4-iodobenzoic acid

Participants

Reaction Conditions

Reaction Steps

1319 g (1.52 mol) of commercial 9.6% sodium hypochlorite solution are added dropwise to a solution of 200 g (1.45 mol) of 3-hydroxybenzoic acid, 61 g (1.52 mol) of sodium hydroxide powder and 228 g (1.52 mol) of sodium iodide in 2 l of methanol cooled beforehand to 0° C. The reaction medium is stirred at room temperature for 72 hours. After evaporating off the methanol, the solution is cooled to 10° C. and acidified with aqueous hydrochloric acid solution to pH 2. The mixture is stirred for 2 hours and the product precipitates. The product is filtered off, washed thoroughly with water and dried under vacuum at 50° C. 150 g (39%) of 3-hydroxy-4-iodobenzoic acid are obtained in the form of a white solid.

Provenance & Evidence