Potassium Carbonate → HCID 23033053, compound

Participants

Reaction Steps

[(Methylamino)phenylmethylene]methane-1,1-dicarbonitrile (3.00 g) and anhydrous potassium carbonate (4.51 g) were added to acetonitrile (200 mL). A solution of methyl bromoacetate (3.09 mL) in acetonitrile (10 mL) was added thereto, and the mixture was heated to reflux for 3 hours. After cooling the mixture to room temperature, it was allowed to stand, the supernatant was separated by decantation, and the solvent was distilled off under reduced pressure. The concentrated residue was combined with the solid portion remaining after decantation, ethyl acetate and water were added, and extraction was performed 3 times with ethyl acetate. The organic layer was washed with water and saturated brine and then dried over anhydrous magnesium sulfate. After filtering off the magnesium sulfate, the solvent was distilled off under reduced pressure. The residue was recrystallized (hexane/ethyl acetate=1/1) to obtain the title compound (1.15 g) as a white solid. The recrystallized residue was purified by silica gel column chromatography (hexane/ethyl acetate=3/1→2/1) to obtain the title compound (1.21 g, (total of 2.36 g with the recrystallized portion), yield: 56%) as a white solid. The NMR and ESI/MS data for this compound are shown below.

Provenance & Evidence