Water → HCID 25052193, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of 4-(3-cyano-4-methoxypyrrole-1-yl)benzoic acid ethyl ester (0.081 g) in dichloromethane (3 mL) was added boron tribromide (0.33 mL, 1 mol/L dichloromethane solution) under ice-cooling, and this mixture was stirred at same temperature for 2 hours. To this reaction mixture was added water, and this mixture was extracted with diethyl ether. This organic layer was washed with brine, dried over anhydrous magnesium sulfate. The solvent was removed under reduced pressure. The residue was purified by column chromatography on silica gel (eluent: ethyl acetate/n-hexane=1/1) to give 4-(3-cyano-4-hydroxypyrrole-1-yl)benzoic acid ethyl ester (0.052 g). To a solution of 4-(3-cyano-4-hydroxypyrrole-1-yl)benzoic acid ethyl ester (0.052 g) in N,N-dimethylformamide (4 mL) were added benzylbromide (0.038 g) and cesium carbonate (0.13 g) at room temperature, and this mixture was stirred at 80° C. for 5 hours. To this reaction mixture was added water at room temperature, and the precipitated solid was collected by filtration, and washed with methanol (5 mL) to give the title compound (0.016 g).

Provenance & Evidence