Hydrochloric Acid → 4-[({7-[4-({[(2-Fluoro-5-methylphenyl)amino]carbonyl}amino)phenoxy]thieno[3,2-b]pyridin-2-yl}carbonyl)amino]butanoic acid

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Reaction Conditions

Reaction Steps

To a stirred solution of ethyl 4-[({7-[4-({[(2-fluoro-5-methylphenyl)amino]carbonyl}amino)phenoxy]thieno[3,2-b]pyridin-2-yl}carbonyl)amino]butanoate (110 mg, 0.20 mmol) in 10 ml of THF was added 1M NaOH (2.0 ml, 2.0 mmol). The mixture was heated at 60° C. for 3 hours, cooled to room temperature and poured into 100 ml of water with vigorous stirring. 2M HCl was added dropwise until pH=4. The precipitates were filtered, washed with water and dried in vacuo to give 4-[({7-[4-({[(2-fluoro-5-methylphenyl)amino]carbonyl}amino)phenoxy]thieno[3,2-b]pyridin-2-yl}carbonyl)amino]butanoic acid as white solid. Yield: 100 mg, 96%.

Provenance & Evidence