15β,16β-epoxy-3β-(tetrahydropyran-2'-yloxy)-β-pregn-17(20)-en-21-yl (phenylthio)acetate 在
四(三苯基膦)钯 作用下,
以60%的产率得到4-[(3S,5R,8R,9S,10S,13S,14S,15R)-15-Hydroxy-10,13-dimethyl-3-(tetrahydro-pyran-2-yloxy)-2,3,4,5,6,7,8,9,10,11,12,13,14,15-tetradecahydro-1H-cyclopenta[a]phenanthren-17-yl]-3-phenylsulfanyl-dihydro-furan-2-one