A mixture of 1-(naphthalen-1-yl)-1H-pyrazol-5-ol (250 mg, 1.2 mmol), ethyl bromoisobutyrate (0.2 mL, 1.3 mmol) and potassium carbonate (318 mg, 1.3 mmol) in DMF (3 mL) was stirred at room temperature for 16 hours. Water was then added to the reaction mixture, extracted with ethyl acetate, dried over sodium sulfate and concentrated. Purification by preparative thin layer chromatography (95% dichloromethane/5% methanol) afforded ethyl 2-methyl-2-(1-(naphthalen-1-yl)-1H-pyrazol-5-yloxy)propanoate as a solid.
