Thionyl Chloride → 3-(4-Chlorobenzyloxy)-N-(2-sulfamoylphenyl)benzamide

Participants

Reaction Steps

A benzene (30 ml) solution containing 4.00 g (15.2 mmol) of 3-(4-chlorobenzyloxy)benzoic acid and 3 ml of thionyl chloride was heated under reflux for 2 hours and then the solvent was evaporated under a reduced pressure. The resulting residue was dissolved in methylene chloride (30 ml), this solution was added dropwise under ice-cooling to a pyridine (50 ml) solution containing 2.75 g (16.0 mmol) of 2-aminobenzenesulfonamide, the mixture was stirred at room temperature for 18 hours and then methylene chloride was evaporated under a reduced pressure. The resulting residue was dissolved in ethyl acetate, washed with a 1 N hydrochloric acid aqueous solution, water and saturated brine in that order and dried over anhydrous sodium sulfate, and then the solvent was evaporated under a reduced pressure. The thus obtained crude crystals were washed with methanol to obtain 4.70 g (yield: 74.0%) of the title compound.

Provenance & Evidence