(4'bS,8'R,8'aR,9'S)-2'-methoxy-8'-methylspiro[1,3-dioxolane-2,7'-5,6,8,8a,9,10-hexahydro-4bH-phenanthrene]-9'-ol 在
2,6-lutidinium p-toluenesulfonate 作用下,
以
水 、
丙酮 为溶剂,
反应 70.0h,
以90%的产率得到(1R*,4aS*,10S*,10aR*)-10-hydroxy-7-methoxy-1-methyl-3,4,4a,9,10,10a-hexahydrophenanthrene-2(1H)-one