Sulfuric Acid → Benzenesulfonic acid, 3,4-diamino-

Participants

Reaction Conditions

Reaction Steps

The solution of benzene-1,2-diamine (5 g, 46.24 mmol) in sulfuric acid (conc, 80 mL) was stirred for 30 min at room temperature and then heated to 140° C. overnight. The reaction mixture was cooled to room temperature and quenched by the addition of ice-water (200 mL). The product was precipitated from water to afford 3,4-diaminobenzene-1-sulfonic acid as a white solid (4.3 g, 49%).

Provenance & Evidence