How is 9,11beta-Epoxy-17-hydroxy-16beta-methyl-3,20-dioxo-9beta-pregna-1,4-diene-21-yl acetate (CAS: 912-38-9) typically synthesized?

The compound is typically synthesized via a multi-step process involving the formation of a pregnenolone derivative, followed by epoxidation, hydroxylation, and acetylation reactions. The key reagents used include bromoacetic acid, sodium hypochlorite, and acetic anhydride. The process often requires the use of palladium catalysts and involves careful control of reaction conditions to achieve high selectivity and yield.