反应详情

To a solution of 4-chloro-2-benzoylphenol (1.95 g) in DMF (30 ml) was added sodium hydride (60% oil) (400 mg). The mixture was stirred for 30 minutes at room temperature, to which was then added methyl ester of bromoacetic acid (1.0 ml). The mixture was stirred for 2 hours under cooling with ice-water. The reaction mixture was concentrated, to which was added ethyl acetate. The mixture was washed with water, which was then dried. The solvent was distilled off, and the residue was purified by means of a silica gel (40 g) column chromatography (hexane-ethyl acetate=3:1) to afford methyl ester of 4-chloro-2-benzoylphenoxyacetic acid as colorless crystals (2.21 g).

1. stirringThe mixture was stirred for 2 hours
2. concentrationThe reaction mixture was concentrated, to which
3. additionwas added ethyl acetate
4. washThe mixture was washed with water, which
5. customwas then dried
6. distillationThe solvent was distilled off
7. customthe residue was purified by means of a silica gel (40 g) column chromatography (hexane-ethyl acetate=3:1)