Acetic Anhydride → HCID 19827807, compound

Participants

Reaction Steps

To a solution of 0.3 g (1.3 mmol) 6-amino-1-methylquinoxaline-2,3(1H,4H)-dione in a mixture of 15 ml water and 0.6 ml 4N sodium hydroxide was added 5 ml acetic acid anhydride. Stirring was continued at 25° C. for 2 h. The precipitate was filtered off and washed with water to give 0.21 g (68%) of 6-acetamido-1-methylquinoxaline-2,3(1H,4H)-dione. M.p. 390° C. NMR (DMSO-d6): 10.1 (1H, broad s), 9.7 (1H, broad s), 7.5-7.0 (3H), 3.43 (3H, s), 2.0 (3H, s).

Provenance & Evidence