反应详情

50 g of 2,4-dichloro-5-methylsulphonylbenzoic acid [obtainable in accordance with Ex. 2] are heated in an autoclave, at 180° and under a pressure of 30 bar for 12 h, together with 500 ml of a 32% aqueous solution of ammonia. The reaction mixture is then poured onto ice, acidified with conc. HCl and extracted by boiling with methanol. 2-Amino-4-chloro-5-methylsulphonylbenzoic acid is obtained, m.p. 284°-286°.

1. additionThe reaction mixture is then poured onto ice
2. extractionextracted