Toluene → (p-Tolylsulphonyl)acetone

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반응 단계

To a 100 ml volume three-necked flask, sodium p-toluenesulfinate (20-a) (9.25 g), tetrabutylammonium bromide (1.65 g), toluene (29 g), and chloroacetone (21-a) (5.0 g) were added, and stirred at 65° C. for 1.25 hours. To the mixture, water (10 g) was added, and stirred for 4 hours. After the mixture was cooled to room temperature, the organic layer was separated, and the aqueous layer was extracted with toluene 2 times. The organic layers were combined, washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was subjected to column chromatography (chloroform: ethyl acetate=20:1) to give 9.749 g of 1-(4-methylphenylsulfonyl)-2-propanone (7-2-4).

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