Sulfuric Acid → 4,8-Dimethyl-7-nonen-2-one

Participants

Reaction Steps

A solution of 47 g. of 4,8-dimethylnon-7-en-2-ol in 250 ml. of methylene chloride is cooled to about 10° as a solution of 46.4 g. of sodium dichromate in 125 ml. of water is added. The mixture is at about 10° as a solution of 46.3 g. of sulfuric acid in 100 ml. of water is added over about 45 minutes. The mixture is allowed to attain room temperature and, after about 3 hours, the organic layer is separated and the aqueous layer is extracted with methylene chloride. The combined organic materials are washed with saturated potassium bicarbonate, water and saturated sodium chloride, dried over magnesium sulfate and evaporated to yield 4,8-dimethylnon-7-en-2-one.

Provenance & Evidence