Dimethyl Sulfoxide → 4-(4-Phenylpyridin-2-yl)-N-pyridin-3-ylpiperazine-1-carboxamide

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Reaction Steps

A solution of 2,2,2-trichloroethyl pyridin-3-ylcarbamate (113 mg, 0.418 mmol), 1-(4-phenylpyridin-2-yl)piperazine (100 mg, 0.418 mmol), diisopropylethylamine (0.146 ml, 0.836 mmol) and dimethylsulfoxide (2 ml) was stirred at 70° C. for 12 hours, then the reaction solution was poured into water, and extracted with ethyl acetate. The extract was washed with water, and dried over anhydrous magnesium sulfate. The solvent was distilled away under reduce pressure, and the residue was purified by basic silica gel column chromatography (ethyl acetate) to give the titled compound as solid product. This was recrystallized from a mixed solvent of hexane and ethyl acetate to give the titled compound 67.2 mg (44.8%) as solid product.

Provenance & Evidence