Ammonia → HCID 19383040, compound

Participants

Reaction Steps

To a stirred solution of 14.21 g (54.4 mmol) of crude methyl 3-(benzoylamino)-2-thiophenecarboxylate in 100 mL of methanol and 100 mL of THF was added 100 mL of concentrated aqueous ammonia. The mixture was stirred at room temperature for 5 days and an additional 100 mL of concentrated aqueous ammonia was added. After stirring for 5 more days the mixture was rotovapped to remove the bulk of the organic solvents and the residue was extracted with two 125 mL portions of ethyl acetate. The insoluble material was collected by filtration and combined with the residue from evaporating the ethyl acetate extracts to dryness to furnish 11.96 g (89%) of crude 3-(benzoylamino)-2-thiophenecarboxamide as a tan solid. 1H-NMR (d6-DMSO)δ7.55(3H,m), 7.7(1H, d), 7.95(2H,m), 8.18(1H,d).

Provenance & Evidence