Sulfuric Acid → Ethyl 7-chloro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylate

Participants

Reaction Conditions

Reaction Steps

The product from Example 21a (0.282 gm, 0.91 mmol) was combined at room temperature with 2 mL of TFA containing 2 drops of sulfuric acid. The resulting mixture was heated at 70° C. for 16.5 h. The volatiles were removed under vacuum and the residue suspended in water. The product was collected by vacuum filtration, water washed and dried under vacuum to give the title compound as a cream colored solid (0.214 gm, 93%).

Provenance & Evidence