(1R,4aR,4bR,7S,8R,10aR)-8-(tert-Butyl-dimethyl-silanyloxy)-7-(1-hydroxy-ethyl)-1,4a,7-trimethyl-1,2,3,4,4a,4b,5,6,7,8,10,10a-dodecahydro-phenanthrene-1-carboxylic acid methyl ester 在
Jones reagent 作用下,
以
丙酮 为溶剂,
以99%的产率得到<1R-(1α,4aβ,4bα,7β,8α,10aα)>-7-Acetyl-8-(tert-butyldimethylsilyloxy)-1,2,3,4,4a,4b,5,6,7,8,10,10a-dodecahydro-1,4a,7-trimethyl-1-phenanthrencarbonsaeure-methylester