Hydrochloric Acid → (5-Chloro-2-{2-[4-(4-fluoro-benzyl)-(2R,5S)-2,5-dimethyl-piperazin-1-yl]-2-oxo-ethoxy}-phenoxy)-acetic Acid

Participants

Reaction Steps

To a solution of (5-chloro-2-{2-[4-(4-fluoro-benzyl)-(2R,5S)-2,5-dimethyl-piperazin-1-yl]-2-oxo-ethoxy}-phenoxy)-acetic acid methyl ester (0.21 g, 0.46 mmol) in methanol (2 mL), tetrahydrofuran (2 mL) and water (1 mL) was added lithium hydroxide monohydrate (0.039 g, 0.93 mmol). The resulting mixture was stirred at ambient temperature for three hours. The reaction was acidifed to pH 4 with 0.2 N aqueous hydrochloric acid and extracted with ethyl acetate. The organic layer was washed with brine, dried over magnesium sulfate and concentrated in vacuo. The crude product was purified by trituration with methylene chloride/diethyl ether to give the title compound (0.16 g).

Provenance & Evidence