反应详情

To a solution of 1.6 g (4.2 mmol) of methyl-4-[(E)-2-(5,5,8,8-tetramethyl-3-methyl-6-hydroxy-5,6,7,8-tetrahydro-naphthalen-2-yl)vinyl]-benzoic acid in 50 ml of methylene chloride at room temperature was added 1.97 g (4.65 mmol) of Dess-Martin periodinane. After 1 h, the reaction mixture was poured into brine and extracted with methylene chloride. The organic fraction was dried over sodium sulfate, adsorbed onto silica gel and purified by flash chromatography (gradient elution: hexane-8% ethyl acetate/hexane) to afford 1.45 g (92%) of methyl-4-[(E)-2-(5,5,8,8-tetramethyl-3-methyl-6-oxo-5,6,7,8-tetrahydro-naphthalen-2-yl)vinyl]-benzoic acid (M+=376).

1. extractionextracted with methylene chloride
2. dry with materialThe organic fraction was dried over sodium sulfate
3. custompurified by flash chromatography (gradient elution: hexane-8% ethyl acetate/hexane)