Water → 4-Cyanobenzoic acid

Participants

Reaction Steps

A mixture containing p-cyanobenzylamine (13.2 g), water (50 g), and ferric chloride (0.2 g) was stirred, and a 14 wt. % aqueous solution (200 g) of sodium hypochlorite was added dropwise thereto at room temperature over two hours. The reaction mixture was further stirred for one hour. Subsequently, water (100 g) and urea (4 g) were added to the mixture, and the resultant mixture was further stirred for minutes. The pH of the mixture was adjusted to four through addition of 98 wt. % sulfuric acid. The precipitated crystals were collected through filtration, washed with water, and dried, to thereby obtain 12.1 g of p-cyanobenzoic acid (yield 82%, based on p-cyanobenzylamine). High performance liquid chromatographic analysis revealed that the obtained p-cyanobenzoic acid had a purity of 95%.

Provenance & Evidence