21-ethyl-16α,17α-dimethyl-5α-pregn-9(11)-ene-3,20-dione 在
2,3-二氯-5,6-二氰基-1,4-苯醌 作用下,
以
甲苯 为溶剂,
生成 (8S,9S,10R,11S,13S,14S,16R,17S)-17-Butyryl-11-hydroxy-10,13,16,17-tetramethyl-6,7,8,9,10,11,12,13,14,15,16,17-dodecahydro-cyclopenta[a]phenanthren-3-one