Potassium Carbonate → 5-Amino-4-[3-(tert-butoxycarbonylmethyloxy)benzoyl]-1-(4-fluorophenyl)pyrazole

Participants

Reaction Conditions

Reaction Steps

A mixture of 5-amino-1-(4-fluorophenyl)-4-[3-hydroxybenzoyl]pyrazole (1.0 g, 3.3 mmol), tert-butyl bromoacetate (1.4 g, 7.2 mmol) and potassium carbonate (1 g, 7.2 mmol) in acetonitrile was heated at 70° C. overnight. The reaction mixture was cooled, diluted with ethyl acetate and filtered. The filtrate was concentrated in vacuo and the residue was purified by flash chromatography (elution gradient: 10% acetone/hexane) to give 5-amino-4-[3-(tert-butoxycarbonylmethyloxy)benzoyl]-1-(4-fluorophenyl)pyrazole (1.2 g) as a solid.

Provenance & Evidence