Hydrochloric Acid → 5-Bromo-2-(4-bromo-2-fluorophenylamino)-1-methyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid

Participants

Reaction Conditions

Reaction Steps

To a suspension of 5-bromo-2-(4-bromo-2-fluorophenylamino)-1-methyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid methyl ester (0.030 g, 0.069 mmol) in methanol (1 mL) was added 1 M NaOH (0.346 mL, 0.346 mmol). The reaction mixture was heated to 60° C. for 12 hours. The reaction mixture was diluted with H2O and the pH was adjusted with 1 M HCl until 1-2. Solids precipitated out of solution, which were collected, washed with H2O and dried under vacuum to yield 0.021 g (72%) pure desired product as a pale yellow solid. MS ESI (+) m/z 421, 423 (M+, Br pattern) detected; 1H NMR (400 MHz, DMSO-d6) δ 13.3 (br s, 1H), 9.93 (s, 1H), 8.21 (s, 1H), 7.66 (d, 1H), 7.34 (d, 1H), 7.05 (t, 1H), 3.18 (s, 3H).

Provenance & Evidence