反应详情

Jones' reagent (138 ml of 1.67 M solution, 230 mmol) is added dropwise over 40 minutes to a cooled (ice-bath) solution of 5-(2,4,6-trimethylphenyl)-4-hydroxycyclopent-2-enone (49.66 g, 230 mmol) in acetone (600 ml). The mixture is stirred for 1 hour. Isopropanol (100 ml) is added and the mixture is stirred at room temperature for 2 hours. The mixture is diluted with ethyl acetate and washed with brine, dried over anhydrous magnesium sulfate, filtered and the filtrate is evaporated under reduced pressure to give 2-(2,4,6-trimethylphenyl)cyclopent-4-ene-1,3-dione.

1. stirringthe mixture is stirred at room temperature for 2 hours
2. washwashed with brine
3. dry with materialdried over anhydrous magnesium sulfate
4. filtrationfiltered
5. customthe filtrate is evaporated under reduced pressure