反应详情

10 g of methyl 2-methyl-4-chloro-5-methylsulphonylbenzoate are added, while cooling with ice, to a mixture of 30 ml of conc. HCl and 200 ml of methanol, and the whole is then stirred for 2 h. The resulting precipitate is filtered off with suction and recrystallized from methanol. 2-Methyl-4-chloro-5-methylsulphonylbenzoic acid is obtained, m.p. 217°-218°.

1. filtrationThe resulting precipitate is filtered off with suction
2. customrecrystallized from methanol