Peracetic Acid → 3beta-Acetoxy-5alpha,25-dihydroxy cholestane

Participants

Reaction Steps

A solution of 50 g 3β-acetoxy-5-α-hydroxy-cholestane (II), in 25 ml. of ethyl acetate was treated with 100 ml. of peracetic acid (70%) in acetic acid and was irradiated with ultra-violet light of about 300 mμ wavelength for 12 hours. The resulting reaction mixture was washed with a solution of aqueous sodium bisulfite, sodium bicarbonate and then with water. After evaporation of the solvent in vacuo, the residue was chromatographed on a column of silica gel to give 10 g of the novel 3β-acetoxy-5α,25-dihydroxy cholestane (IV) which was recrystallized from methanol, m.p. 180°-182°C.

Provenance & Evidence