Hydrochloric Acid → HCID 15085897, compound

Participants

Reaction Steps

To a suspension of 0.3 g of zinc dust in 3 ml of diethyl ether is added 50 mg of cuprous chloride. The resulting mixture is refluxed for 30 minutes and then 1.06 g of diiodomethane is added. The resulting solution is refluxed for 30 minutes and 0.3 g of 4,4-difluoro-3β-(2-tetrahydropyranyloxy)-17β-ethenyloxyadrost-5-ene is added. The resulting mixture is refluxed for 16 hours and then diluted with 10 ml of diethyl ether and filtered. The solid which is separated is washed with ethyl acetate (3 times, 50 ml) and the combined filtrate and washings are washed with saturated aqueous ammonium chloride and dried over magnesium sulfate. The solvent is then removed under reduced pressure to leave a residual solid which is crude 4,4-difluoro-3β-(2-tetrahydropyranyloxy)-17β-(cyclopropyloxy)androst-5-ene containing some 17β-(cyclopropyloxy)cycloprop[5,6]androstane product. This material is treated with a catalytic amount of hydrochloric acid in aqueous dioxane to remove the tetrahydropyranyl protecting group. The solvent is then removed under reduced pressure to leave a residual crude solid which is purified by reverse phase high-pressure liquid chromatography to give 4,4-difluoro-17β-(cyclopropyloxy)androst-5-en-3β-ol. The compound has the following structural formula: ##STR4##

Provenance & Evidence