反应详情

温度

60 °C

(Step 2) To a solution of methyl 5-chloro-2-(methylsulfonyl)benzoate obtained in Step 1 (2.65 g) in tetrahydrofuran-ethanol (50 ml+5 ml) was added lithium borohydride (348 mg) at 0° C. The mixture was stirred at 60° C. for 2 hr, treated with ice, and extracted with ethyl acetate. The extract was washed successively with 1N hydrochloric acid and saturated brine, and dried over magnesium sulfate. The solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate:hexane=2:1) to give [5-chloro-2-(methylsulfonyl)phenyl]methanol (2.1 g).

1. additiontreated with ice
2. extractionextracted with ethyl acetate
3. washThe extract was washed successively with 1N hydrochloric acid and saturated brine
4. dry with materialdried over magnesium sulfate
5. customThe solvent was evaporated under reduced pressure
6. customThe residue was purified by silica gel column chromatography (ethyl acetate:hexane=2:1)