反应详情

Sodium acetate (10.4 g, 126.8 mmol) was added to a solution of methyl 2,5-bis(bromomethyl)benzoate (described in J. Am. Chem. Soc., 121, 1192 (1999); 12.65 g, 39.3 mmol) in dimethyl sulfoxide (80 ml), and the mixture was stirred at room temperature for 1 hour. After a saturated aqueous solution of ammonium chloride (150 ml) was added thereto, the product was extracted with ethyl acetate. The organic layer was washed with water and then with a saturated aqueous solution of sodium chloride, and the solvent was distilled off under reduced pressure. The obtained oily residue was subjected to chromatography on a silica gel (200 g) column (eluent; ethyl acetate:hexane=1:5˜1:2) to afford the title compound (7.72 g, 70% yield) as an oil.

1. extractionthe product was extracted with ethyl acetate
2. washThe organic layer was washed with water
3. distillationwith a saturated aqueous solution of sodium chloride, and the solvent was distilled off under reduced pressure