Water → HCID 67362260, 화합물

Potassium carbonate (0.6 g, 4.4 mmol) was added to a suspension of 15α-acetoxy-18-methyl-estr-4-en-3,17-dione (3 g, 8.7 mmol) in methanol (27 ml) and the mixture was heated at 40° C. for 1 h. The mixture was allowed to cool to room temperature and water (100 ml) was then added. The precipitate was filtered, washed with water and dried under vacuum, to afford 18-methyl-estra-4,15-dien-3,17-dione (1.7 g, yield: 70%).