Methyl 1,3,4,9,10,10a-hexahydro-9-oxo-4a(2H)-phenanthrenecarboxylate 、
potassium trimethylsilonate 在
silica gel 作用下,
以
四氢呋喃 为溶剂,
反应 60.0h,
以Workup as before and chromatography on silica gel gave the title compound (1.1 g, 78%)的产率得到1,3,4,9,10,10a-Hexahydro-9-oxo-4a(2H)-phenanthrene carboxylic acid