2-Chlorobenzoic Acid → Benzoic acid, 2-chloro-5-(chlorosulfonyl)-

Participants

Reaction Conditions

Reaction Steps

Commerically available 2-chlorobenzoic acid (80.0 g), (0.5 mol), was added portionwise to chlorosulphonic acid (320 g) with vigorous stirring. The reaction was heated to 95° C. for 6 hrs then cooled overnight to room temperature. The solution was quenched onto ice/water (1.5 kg/324 ml) and stirred for 15 min. The precipitated product was filtered, water washed and dried at 50° C. in vacuo, to give the title compound (111.1 g, 85.2%) as a white solid with m.p. 140° C. δ (CDCl3): 7.42 (1H,m), 8.27 (1H,m), 8.75 (1H,m).

Provenance & Evidence