反应详情

A solution of [3-(methylthio)-5-(trifluoromethyl)phenyl]methanol (200 mg, 0.99 mmol) in CH2Cl2 (20 mL) was cooled to 0° C. and then Dess-Martin periodinane (573 mg, 1.35 mmol) was added. The reaction was slowly warmed to room temperature. After stirring at room temperature for twenty minutes, the reaction was poured into 1N NaOH (25 mL). The mixture was extracted with EtOAc (75 mL). The organic extracts were washed with brine (25 mL), dried over Na2SO4, filtered, and concentrated. Purification by flash chromatography with 1% to 10% EtOAc/hexanes afforded 3-(methylthio)-5-(trifluoromethyl)benzaldehyde. Rf=0.55 (25% EtOAc/hexanes). 1H NMR (CDCl3, 500 MHz) δ 10.02 (s, 1H), 7.87 (s, 1H), 7.84 (s, 1H), 7.68 (s, 1H), 2.58 (s, 3H).

1. extractionThe mixture was extracted with EtOAc (75 mL)
2. washThe organic extracts were washed with brine (25 mL)
3. dry with materialdried over Na2SO4
4. filtrationfiltered
5. concentrationconcentrated
6. customPurification by flash chromatography with 1% to 10% EtOAc/hexanes