Potassium Carbonate → HCID 18653278, compound

Participants

Reaction Steps

A solution of (S)-(E)-2-(3,4-dimethoxy-5-hydroxybenzylidene)-3-(3,4,5-trimethoxybenzyl)butanolide (7.5 g, 17.4 mmol), p-nitrobenzyl bromide (4.6 g, 21.3 mmol) and potassium carbonate (3.0 g, 21.7 mmol) in 100 ml of acetone was heated under reflux for 3.5 hours. After the solvent was distilled off under reduced pressure, the residue was added with water and then ethyl acetate. The organic layer was washed successively with 2N-HCl, water, saturated NaHCO3 and saturated NaCl and then, dried over anhydrous magnesium sulfate. The solvent was thereafter distilled off. The residue thus obtained was purified by column chromatography, whereby 9 g of the title compound were obtained as colorless foam (yield: 91%).

Provenance & Evidence