Water → HCID 178498304, compound

Participants

Reaction Steps

A solution of 6-hydroxynicotinic acid (1.00 g, 7.19 mmol) and concentrated sulfuric acid (0.47 ml) in methanol (80 ml) was refluxed for 10 hours then poured into water and sodium bicarbonate (1.45 g) was added. The solvents were evaporated in vacuo and the residue was purified by flash chromatography on silica gel (eluting with 10%-20% methanol in dichloromethane) to give 6-hydroxynicotinic acid, methyl ester as a colourless solid (996 mg, 90%). The product was dissolved in concentrated aqueous ammonia solution and heated at 60° C. for 10 hours. Evaporation of the solvent in vacuo left a solid which was recrystallized from water to give 371 mg, 61% of the title compound as colourless needles.

Provenance & Evidence