反应详情

温度

65 °C

Ethyl 3-n-propylpyrazole-5-carboxylate (1.05 g, 5.8 mmol), 4′-bromomethyl-3′-fluorobiphenyl-2-carboxylic acid t-butyl ester (2.0 g, 5.8 mmol), and potassium carbonate (1.6 g, 11.5 mmol) were dissolved in DMF (10 mL). The mixture was stirred at 65° C. for 16 hours, then diluted with EtOAc. The organic layer was washed with saturated NaHCO3 and saturated aqueous NaCl, and dried over Na2SO4. The solvent was removed in vacuo and the residue was purified by flash chromatography (EtOAc in hexanes) to yield 1-(2′-t-butoxycarbonyl-3-fluorobiphenyl-4-ylmethyl)-5-propyl-1H-pyrazole-3-carboxylic acid ethyl ester (2.7 g).

1. washThe organic layer was washed with saturated NaHCO3 and saturated aqueous NaCl
2. dry with materialdried over Na2SO4
3. customThe solvent was removed in vacuo
4. customthe residue was purified by flash chromatography (EtOAc in hexanes)