反应详情

112.6 g (1.0 mol) of chlorobenzene are added dropwise at 70° C. over a period of 1 hour to 122 g (1.05 mol) of chlorosulfonic acid. The mixture is then stirred at this temperature for 15 minutes. 1 g of sulfamic acid is then added and 180 g (1.5 mol) of thionyl chloride are added dropwise at 70° C. in the course of 2 hours. Working up is carried out as described in Example 1. 228.3 g of moist 4-chlorobenzenesulfonyl chloride having a water content of 12% are obtained. This corresponds to 200.9 g of 4chlorobenzenesulfonyl chloride (94.4% of theory), calculated as dry material, having a purity of 95%.