反应详情

Into a 100-mL round-bottom flask, was placed a solution of methyl 3-(2-cyclopropyl-1-hydroxyethyl)-4-methylbenzoate (compound 4.4, 200 mg, 0.85 mmol) in dichloromethane (30 mL). This was followed by the addition of Dess-Martin periodinane (721 mg, 1.70 mmol) in portions at room temperature. The resulting solution was stirred for 1 h at room temperature, then quenched with saturated aqueous Na2S2O3 (30 mL). The resulting mixture was extracted with DCM (3×20 mL) and the combined organics was washed with brine (2×20 mL), dried (Na2SO4), filtered, and concentrated under reduced pressure. The residue was purified by silica gel chromatography with ethyl acetate/petroleum ether (1:5) as the eluent to yield the title compound as a yellow oil (150 mg, 75%).

1. customInto a 100-mL round-bottom flask, was placed
2. customquenched with saturated aqueous Na2S2O3 (30 mL)
3. extractionThe resulting mixture was extracted with DCM (3×20 mL)
4. washthe combined organics was washed with brine (2×20 mL)
5. dry with materialdried (Na2SO4)
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure
8. customThe residue was purified by silica gel chromatography with ethyl acetate/petroleum ether (1:5) as the eluent