Sodium Cyanide → 2-(2-Bromo-5-methoxyphenyl)acetonitrile

関与物質

反応手順

To the THF solution (1000 ml) of 2-bromo-5-methoxy-benzoic acid methyl ester (20 g, 81.6 mmol), the THF suspension (50 ml) of LAH (4.07 g, 102 mmol) was added under ice cooling. The mixture was stirred for 30 min under ice cooling. The reaction solution was partitioned between saturated aqueous solution of Na2SO4 and ethyl acetate. The organic layer was washed with saturated brine and concentrated under reduced pressure. The resulting residues were dissolved in DCM (200 ml), and added with TEA (12.51 ml, 89.76 mmol) and MsCl (6.63 ml, 85.68 mmol) under ice cooling, followed by stirring overnight at room temperature. The reaction mixture was diluted with DCM, and washed in order with 10% aqueous solution of citric acid, saturated aqueous solution of NaHCO3 and saturated brine. The residues obtained after concentration under reduced pressure were dissolved in DMF (100 ml), and added with the DMF (500 ml) solution of NaCN (40 g, 81.6 mmol) under ice cooling. After stirring for 2 hrs under ice cooling, the reaction mixture was extracted with ether, washed with saturated brine and dried over magnesium sulfate. The residues obtained after concentration under reduced pressure were purified by silica gel column (hexane:ethyl acetate=10:1) to obtain the title compound (12.1 g, 67%).

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