N,N-Dimethylglycine → 5-Benzyloxy-2-(3-cyano-4-phenylpyrrole-1-yl)isonicotinic acid ethyl ester

Participants

Reaction Conditions

Reaction Steps

To a solution of 3-cyano-4-phenylpyrrole (0.20 g) in dimethylsulfoxide (2 mL) was added 5-benzyloxy-2-bromoisonicotinic acid ethyl ester (0.30 g), cesium carbonate (0.30 g), copper iodide (0.010 g) and N,N-dimethyl glycine (0.020 g) at room temperature, and this mixture was stirred at 110° C. for 8 hours. The insoluble material was removed by suction through a Celite pad. This filtrate was poured into water, and this mixture was extracted with ethyl acetate. This organic layer was washed with water and brine, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel (eluent: ethyl acetate/n-hexane=10/90-60/40) to give the title compound (0.20 g).

Provenance & Evidence