Hydrochloric Acid → HCID 22842945, compound

Participants

Reaction Steps

Step (E) 16α-Methyl-17β-(1-oxo-[4-hydroxy]butyl)androsta-4,9(11)-dien-3-one 16α-Methyl-17β-(1-oxo-[4-tetrahydropyranyloxy]butyl)-androsta-5,9(11)-dien-3-one 3-ethylene ketal, step (D), is dissolved in aceton (90 ml) and hydrochloric acid (1N, 10 ml) and allowed to stand at 20°-25° for several hours. Following addition of potassium bicarbonate (1N, 25 ml), the mixture is concentrated and extracted with ethyl acetate. The concentrate is chromatographed on silica gel eluting with acetone/methylene chloride. The appropriate fractions are pooled and concentrated to give 16α-methyl-17β-(1-oxo-[4-hydroxy]butyl)androsta-4,9(11)-dien-3-one.

Provenance & Evidence