反应详情

A solution of 2-(4-bromo-2,6-dimethyl-phenyl)-5-(cyclohexyl-hydroxy-methyl)-3-methoxy-cyclopent-2-enone (1.38 g, 3.4 mmol) in ethanol (27.6 ml) and 2N aqueous hydrochloric acid (13.8 ml) is subjected to microwave irradiation at 130° C. for 40 minutes. The reaction mixture is concentrated under vacuum to remove ethanol. The aqueous layer was extracted with ethyl acetate (3×100 ml) and combined organic layers are dried with sodium sulfate and concentrated under vacuum to obtain crude mass. The compound was purified by column chromatography to give 2-(4-bromo-2,6-dimethyl-phenyl)-4-[1-cyclohexyl-meth-(E)-ylidene]-cyclopentane-1,3-dione (250 mg).

1. customirradiation at 130° C. for 40 minutes
2. concentrationThe reaction mixture is concentrated under vacuum
3. customto remove ethanol
4. extractionThe aqueous layer was extracted with ethyl acetate (3×100 ml)
5. dry with materialare dried with sodium sulfate
6. concentrationconcentrated under vacuum
7. customto obtain crude mass
8. customThe compound was purified by column chromatography