((3aR,5aR,6S,9aS,9bR)-3a-Hydroxy-6,9a,9b-trimethyl-3,7-dioxo-dodecahydro-cyclopenta[a]naphthalen-6-yl)-acetic acid methyl ester 在
jones reagent 作用下,
以
丙酮 为溶剂,
以99%的产率得到3-((1R,4aR,5S,8aS)-5-Methoxycarbonylmethyl-1,5,8a-trimethyl-2,6-dioxo-decahydro-naphthalen-1-yl)-propionic acid