Water → HCID 9794709, compound

Participants

Reaction Steps

A suspension of 1-Benzyloxy-7-(benzyloxycarbamoyl)quinoxaline-2,3(1H,4H)-dione (250 mg, 0.6 mmol) in 50 ml of ethanol was hydrogenated at atmospheric pressure and room temperature for 1 h in the presence of 50 mg of 5% palladium on carbon. Water (20 ml) and 4 ml of 2 N sodium hydroxide was added to dissolve the product and the catalyst was removed by filtration. The filtrate was acidified with 4 ml of 4M hydrochloric acid, evaporated to about 10 ml and filtered to give a white solid. Washing with a small amount of cold water and ethanol yielded 109 mg (70%) of the title compound. 1H-NMR (DMSO-d6): 7.21 (d, J=8 Hz, 1H, ArH), 7.60 (dd, J=8 Hz, 2 Hz, 1H, ArH), 7.90 (d, J=2 Hz, 1H, ArH), 9.05 (br.s, 1H, exchangeable), 11.35 (br.s, 1H, exchangeable), 11.82 (br.s, 1H, exchangeable), 12.35 (br.s, 1H, exchangeable).

Provenance & Evidence