m-Chloroperbenzoic acid → 20,20-Ethylenedioxy-2alpha,3alpha-epoxy-5alpha-pregnan-11-one

Participants

Reaction Steps

85%-m-Chloroperoxybenzoic acid (14.74 g) was added to a stirred solution of 20,20-ethylenedioxy-5α-pregn-2-en-11-one (26.0 g) at 20° to 25° during 15 minutes. After 45 minutes the solution was washed with 5% sodium hydrogen carbonate solution (2×300 ml) and water (300 ml). Evaporation of the solvent and crystallisation of the residue from 1% pyridine in methanol (300 ml) gave the title compound (23.6 g) m.p. 159°-160°.

Provenance & Evidence