Cesium carbonate → HCID 135955928, compound

Participants

Reaction Steps

To a solution of 5-benzyl-2-ethoxy-6-methylpyrimidin-4(3H)-one (0.27 g) and 3-[4′-(bromomethyl)biphenyl-2-yl]-5-(trichloromethyl)-1,2,4-oxadiazole (0.58 g) in N,N-dimethylformamide (5 mL) was added cesium carbonate (0.44 g), and the mixture was stirred for 12 hr. The reaction mixture was diluted with ethyl acetate, washed with 1 M hydrochloric acid and saturated brine and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure. The residue was dissolved in tetrahydrofuran-ethanol (1:1, 4 mL), 1 M sodium hydroxide (2 mL) was added and the mixture was stirred for 30 min. The reaction mixture was weakly acidified with 1 M hydrochloric acid and extracted with ethyl acetate. The organic layer was washed with saturated brine and dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography to give the title compound (0.11 g, 20%) as a colorless solid.

Provenance & Evidence