Hydrochloric Acid → (2S)-5-tert-butoxy-2-{[(5-{4-[3-fluoro-4-({[(3-methylphenyl)amino]carbonyl}amino)phenoxy]pyridin-2-yl}-1H-pyrrol-3-yl)carbonyl]amino}-5-oxopentanoic acid

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Reaction Steps

To a stirred solution of (S)-5-tert-butyl 1-methyl 2-{[(5-{4-[3-fluoro-4-({[(3-methylphenyl)amino]carbonyl}amino)phenoxy]pyridin-2-yl}-1H-pyrrol-3-yl)carbonyl]amino}pentanedioate (120 mg, 0.19 mmol) in a mixture of solvents THF/MeOH (5 ml/5 ml) was added 1 ml of 1M NaOH (1 mmol) solution. The mixture was stirred at room temperature for 30 minutes, and poured into 100 ml of water. 2M HCl was added dropwise until pH=4. The resulting precipitates were filtered, washed with water, and dried in vacuo to give (2S)-5-tert-butoxy-2-{[(5-{4-[3-fluoro-4-({[(3-methylphenyl)amino]carbonyl}amino)phenoxy]pyridin-2-yl}-1H-pyrrol-3-yl)carbonyl]amino}-5-oxopentanoic acid as white solid. Yield: 100 mg, 85%.

Provenance & Evidence