Hydrochloric Acid → HCID 13910344, compound

Participants

Reaction Steps

To a stirred slurry of 841 mg (3.0 mmole) of N-benzoyl-2-oxindole-1-carboxamide in 5 ml of N,N-dimethylformamide was added 806 mg (6.6 mmole) of 4-(N,N-dimethylamino)pyridine. Stirring was continued for a few minutes, and then the slurry was cooled in an ice-bath and a solution of 337 mg (3.3 mmole) of acetic anhydride in 2 ml of N,N-dimethylformamide was added dropwise. Stirring was continued for 1 hour, and then the reaction mixture was poured onto a mixture of 65-70 ml. of ice-water and 2.2 ml of 3 N hydrochloric acid. The solid which precipitated was recovered by filtration. It was recrystallized from ethanol to give 385 mg of the title compound as tan crystals, mp 198° C.

Provenance & Evidence