9α-bromo-11β,17α-dihydroxy-16α-methyl-3,20-dioxopregna-1,4-dien-21-acetate 在
selenium(IV) oxide 作用下,
以
1,4-二氧六环 为溶剂,
反应 28.0h,
以68%的产率得到Acetic acid 2-((6R,8S,9R,10S,11S,13S,14S,16R,17R)-9-bromo-6,11,17-trihydroxy-10,13,16-trimethyl-3-oxo-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-3H-cyclopenta[a]phenanthren-17-yl)-2-oxo-ethyl ester