反应详情

To a solution of benzoic acid (2.44 g, 20 mmol) and 2-bromoethan-1-ol (1.42 mL, 20 mmol) in 40 mL of anhydrous dichloromethane, a solution of 1,3-dicyclohexylcarbodiimide (4.12 g, 20 mmol) in dichloromethane was slowly added followed by addition of a catalytic amount of 4-(dimethylamino)pyridine. The resulting mixture was stirred at room temperature for 16 hrs. After filtration, the filtrate was washed with 5% NaHCO3, brine, and dried over Na2SO4. After removing the solvent, chromatography (silica gel, 10% ethyl acetate in hexane) of the residue gave 3.7 g (82%) of the title compound. 1H NMR (400 MHz, CDCl3): δ 3.62 (t, J=6 Hz, 2H), 4.60 (t, J=6 Hz, 2H), 7.42 (m, 2H), 7.54 (m, 2H), 8.04 (m, 2H).

1. filtrationAfter filtration
2. washthe filtrate was washed with 5% NaHCO3, brine
3. dry with materialdried over Na2SO4
4. customAfter removing the solvent, chromatography (silica gel, 10% ethyl acetate in hexane) of the residue