在
pyridinium chlorochromate 作用下,
以55%的产率得到(8S,9S,10R,13S,14S,17R)-17-[(1R,2S)-1-[(2R,4aR,4bS,10bS,12aR)-1,1,4a,10b-tetramethyl-3,4,4b,5,6,11,12,12a-octahydro-2H-chrysen-2-yl]-1-[(2S)-4-oxopentan-2-yl]oxypropan-2-yl]-10,13-dimethyl-1,2,6,7,8,9,11,12,14,15,16,17-dodecahydrocyclopenta[a]phenanthren-3-one