Water → HCID 67364108, compound

Participants

Reaction Steps

Triethyl orthoformate (5 ml, 30 mmol) and p-Toluenesulfonic acid (25 mg, 0.13 mmol) were added to a suspension of 15α-acetoxy-18-methyl-estr-4-en-3,17-dione (5 g, 14.5 mmol) in EtOH (40 ml). The mixture was stirred at room temperature for 1 h. Triethylamine (5 ml, 35.9 mmol) was added, and the mixture was heated under reflux for 1 h, cooled to room temperature and water (30 ml) was then added. The precipitate was filtered, washed with water and dried under vacuum to afford 3-ethoxy-18-methyl-estra-3,5,15-trien-17-one (4 g, yield: 88%).

Provenance & Evidence