Hydrochloric Acid → Ethyl 2-(3-isopropyl-5-methyl-1H-pyrazol-1-yl)acetate

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Reaction Steps

Ethyl bromoacetate (1.00 mL, 9.03 mmol) was added to 5-isopropyl-3-methyl-1H-pyrazole (1.07 g, 8.60 mmol) and potassium carbonate (3.57 g, 25.9 mol) in DMF (10 mL). The mixture was stirred at room temperature for 17 hours then EtOAc (20 mL) and aqueous HCl (20 mL, 1 M) were added. The organic phase was dried over magnesium sulphate then evaporated in vacuo. The residue was purified by column chromatography on silica gel (hexane:EtOAc 4:1) to afford the title compound as a yellow oil in 34% yield, 607 mg.

Provenance & Evidence