Oxalic acid dihydrate → HCID 178514680, compound

Participants

Reaction Steps

A mixture of 1.0 g (3.4 mmol) 1,2-diamino-4-sulphamoyl-naphtalene and 1.0 (7.9mmol) oxalic acid dihydrate in 20 ml 2N HCl was refluxed for 2 hours. After cooling to room temperature the precipitate was filtered off and washed with water. The crude product was recrystallized from dimethylformamide/water to give 0.6g(50%) of the title compound, M.p. > 300° C., H NMR (DMSO-d6): 1.22(2H,s), 8.7(2H,m), 8.2(1H,s), 7.7-(4H,m).

Provenance & Evidence