Acetic Acid → [4-Difluoromethoxy-2-ethyl-8-fluoro-3-(4-methoxybenzyl)quinolin-5-yloxy]acetic acid

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Reaction Steps

A solution of [4-difluoromethoxy-2-ethyl-8-fluoro-3-(4-methoxybenzyl)quinolin-5-yloxy]acetic acid methyl ester (0.30 g) in methanol (10 mL), and water (1.0 mL) was treated with 5.0 M aqueous sodium hydroxide solution (0.67 mL) and the resulting mixture was stirred at room temperature for 1 hour. The mixture was acidified by the addition of glacial acetic acid, concentrated under reduced pressure, and the residue purified by preparative reverse-phase HPLC to afford title compound as a pale yellow solid (0.086 g).

Provenance & Evidence