Hydrochloric Acid → 5-{4-[4-({[(2-fluoro-5-methylphenyl)amino]carbonyl}amino)phenoxy]pyridin-2-yl}-1H-pyrrole-3-carboxylic acid

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Reaction Conditions

Reaction Steps

To a stirred solution of methyl 5-{4-[4-({[(2-fluoro-5-methylphenyl)amino]carbonyl}amino)phenoxy]pyridin-2-yl}-1H-pyrrole-3-carboxylate (1.38 g, 3.00 mmol) in a mixture of solvents THF/MeOH (20 ml/20 ml) was added 2 ml of 5M NaOH (10 mmol) solution. The mixture was heated in a 72° C. bath for 5 hours, cooled to room temperature and poured into 200 ml of water. 2M HCl was added until pH=3. The resulting precipitates were filtered, washed with water, and dried in vacuo to give 5-{4-[4-({[(2-fluoro-5-methylphenyl)amino]carbonyl}amino)phenoxy]pyridin-2-yl}-1H-pyrrole-3-carboxylic acid as light brown solid. Yield: 1.28 g, 96%.

Provenance & Evidence