Water → N-[2-chloro-4-[[[(3-hydroxyphenyl)methyl]amino]carbonyl]benzoyl]-3-(thiophene-2-carbonyl)amino-L-alanine

Participants

Reaction Steps

A solution of N-[2-chloro-4-[[[(3-hydroxyphenyl)methyl]amino]carbonyl]benzoyl]-3-(thiophene-2-carbonyl)amino-L-alanine, methyl ester (8.30 g, 16.1 mmol) and lithium hydroxide monohydrate (2.05 g, 48.9 mmol) in tetrahydrofuran (60 mL), methanol (20 mL), and water (40 mL) was stirred at room temperature overnight. The solution was concentrated to remove tetrahydrofuran and methanol, and ethyl acetate (200 mL) and 1 M HCl (100 mL) were added. The aqueous layer was extracted with ethyl acetate (100 mL) and the combined organic layers were washed with brine (200 mL), dried (MgSO4), filtered, and evaporated to give N-[2-chloro-4-[[[(3-hydroxyphenyl)methyl]amino]carbonyl]benzoyl]-3-(thiophene-2-carbonyl)amino-L-alanine (7.75 g, 96%) as a white solid.

Provenance & Evidence