Acetic Anhydride → 1-Acetylindolin-2-one

Participants

Reaction Steps

A solution of oxindole (5.0 g, 37.5 mmol) in acetic anhydride (7.1 mL, 75.1 mmol) and acetic acid (25 mL) was refluxed for 20 h. After cooling to room temperature, the reaction mixture was diluted with water (200 mL). The resulting solids were filtered, washed with water and dried to give N-acetyl oxindole as a white solid (5.2 g, 79%).

Provenance & Evidence