Trifluoro-acetic acid (S)-6a-methyl-7-oxo-5,6,6a,7,8,9,11,12-octahydro-chrysen-2-yl ester 在
ruthenium trifluoroacetate 、
氢气 作用下,
以
三氟乙酸 为溶剂,
以35%的产率得到Trifluoro-acetic acid (4bR,6aS,10aR,10bS)-6a-methyl-7-oxo-4b,5,6,6a,7,8,9,10,10a,10b,11,12-dodecahydro-chrysen-2-yl ester