Potassium Carbonate → HCID 67364108, compound

Participants

Reaction Steps

Triethyl orthoformate (2 ml, 12 mmol) and p-Toluenesulfonic acid (20 mg, 0.10 mmol) were added to a suspension of 15α-acetoxy-18-methyl-estr-4-en-3,17-dione (2 g, 5.81 mmol) in ethanol (20 ml). The mixture was stirred at room temperature for 1 h. Potassium carbonate (1.1 g, 8.06 mmol) in solution in water (20 ml) was added and the mixture was heated under reflux for 2 h, cooled to 10° C. and water (20 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 (1.3 g, yield: 78%). mp and 1H-NMR were in accordance with those obtained for example 2. HPLC analysis was as shown in FIG. 1b.

Provenance & Evidence