Hydrochloric Acid → HCID 19827789, compound

Participants

Reaction Steps

A solution of 0.5 g (2.3 mmol) 1-methyl-6-nitroquinoxaline-2,3(1H,4H)-dione in 25 ml dimethylformamide was hydrogenated at atm. pressure by using 5% Pd-c (0.1 g) as a catalyst. The reaction mixture was added 1 ml 4N hydrochloric acid, filtered and evaporated in vacuo. The residue was stirred with ethyl acetate. The precipitate was filtered off to give 0.5 g (98%) of 6-amino-1-methyl-quinoxaline-2,3 (1H,4H)-dione hydrochloride. NMR (DMSO-d6 +D2O): 7.3 (1H, d), 7.13 (1H, s), 7.1 (1H, d), 3.5 (3H, s), 2.6 (3H, s).

Provenance & Evidence