[2-[(1'S,2'R,7'R,9'S,11'S,12'S,15'R,16'S,18'R)-15',18'-dihydroxy-2',16'-dimethylspiro[1,3-dioxolane-2,5'-8-oxapentacyclo[9.7.0.02,7.07,9.012,16]octadecane]-15'-yl]-2-oxoethyl] acetate 在
氢氟酸 作用下,
以
水 为溶剂,
反应 0.5h,
生成
6β-fluoro-pregnane-5α,11α, 17α,21-tetrol-3,20-dione 21-acetate