Nitric Acid → HCID 19696261, compound

Participants

Reaction Steps

The parent quinoxalinedione (Example 33) was mixed with 50 mL trifluoroacetic acid and 1 mL fuming nitric acid at 0° C. and stirred for 3 h, then warmed to room temperature for 2 h. The solvent was evaporated, the residue taken up in acetone, and the solid collected by filtration. After washing with water and then tetrahydrofuran, the material was dried to give 1.3 g of the compound as the hydrochloride salt. CHN calc'd for C11H10N4O4.HCl.0.5H2O; C, 38.39; H, 3.52; N, 16.28; found-C, 38.54; H, 3.57; N, 17.39. CI MS m/e (M+1) 263. H-NMR (400 MHz, dmso) 1H, s, 12.2; 1H, s, 12.12; 2H, br s, 8.1; 1H, s, 7.9; 1H, br s, 4.2: 1H, dd, 3.7; 2H, m, 3.4; 1H dd, 3.1.

Provenance & Evidence