Acetic Acid → 8-Bromo-2-methoxy-1-methyl-11,12-dihydro-dibenzo[a,e]cyclooctene-5,6-dione

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Reaction Conditions

Reaction Steps

A mixture of 8-bromo-2-methoxy-1-methyl-11,12-dihydro-6H-dibenzo [a,e]cycloocten-5-one 12 (1.0 g: 2.9 mmol), acetic acid and selenium dioxide (0.64 g; 5.8 mmol) was stirred at 150° C. for 2 hr, cooled to room temperature, diluted with dichloromethane and filtered through silica gel to remove the suspended solids. The filtrate was evaporated to dryness. The residue was heated in ethyl acetate and crystallized by adding hexane to give compound 13 as grey needles, 0.71 g, 68% yield.

Provenance & Evidence