Potassium Carbonate → 1-{2-Methoxy-4-[3-((R)-2-methyl-pyrrolidin-1-yl)-propoxy]-phenyl}-ethanone

Participants

Reaction Steps

In a 250 mL round bottom flask, 1-[4-(3-chloro-propoxy)-2-methoxy-phenyl]-ethanone (6.18 g, 25.5 mmol), benzenesulfonate (R)-2-methyl-pyrrolidinium (12.4 g, 50.9 mmol), potassium carbonate (14.1 g, 102 mmol), and potassium iodide (20 mg, 0.12 mmol) in acetonitrile (100 mL) was heated to reflux 14 h. The reaction was cooled and the solvent concentrated under vacuum. The slurry was partitioned between methylene chloride and water, then washed with water three times. The organics were extracted three times with 3% citric acid solution. The combined aqueous layers were basified with sat. NaHCO3 sol. and extracted with methylene chloride, then dried over MgSO4. The solvents were removed under vacuum to produce 4.25 g (57%) of oil. MS m/z 292 (M+H).

Provenance & Evidence