Benzenesulfonamide → N-benzenesulfonyl-4-acetylamino-3-nitrobenzamide

Participants

Reaction Steps

N,N′-carbonyldiimidazole (14.45 g) was added to a solution of 10.00 g of 4-acetylamino-3-nitrobenzoic acid in 300 ml of N,N-dimethylformamide, and the mixture was stirred at room temperature for 1 hour. Subsequently, 14.03 g of benzenesulfonamide and 13.58 g of diazabicycloundecene were added thereto, and the mixture was stirred at 100° C. for 72 hours. The reaction mixture was separated with the addition of chloroform and water. The organic layer was then concentrated, and the resulting residue was purified through silica-gel column chromatography (eluent: a mixture of ethyl acetate and methanol at a ratio of 4:1) to give 12.67 g of N-benzenesulfonyl-4-acetylamino-3-nitrobenzamide.

Provenance & Evidence