Chloranil → HCID 86734740, compound

Participants

Reaction Steps

17β,19-Dihydroxy-4-androsten-3-one diacetate and chloranil are dissolved in t-butanol which is rapidly brought to its reflux temperature. The t-butanol is removed by distillation at atmospheric pressure at such a rate that the total reflux and distillation time equals 1 hour. The dark residue which remains is triturated with hot chloroform and filtered. The filtrate is extracted with water, a 2% sodium hydroxide solution, again with water, dried over magnesium sulfate and the solvent removed by evaporation to yield 17β,19-dihydroxy-4,6-androstadiene-3-one diacetate. The diene so prepared is refluxed with dichlorodicyanobenzoquinone in anhydrous dioxane for about 48 hours. The mixture is cooled, filtered and the filtrate poured onto a mixture of methylenechloride and water. The organic layer is separated, washed with water, dried well over magnesium sulfate and the solvent removed. The dark residue which remains is chromatographed on a silica gel column and eluted with methylenechloride. The eluate yields the desired 17β,19-dihydroxy-1,4,6-androstatrien-3-one diacetate.

Provenance & Evidence