Trifluoro-methanesulfonic acid (S)-13-methyl-17-oxo-7,8,9,11,12,13,14,15,16,17-decahydro-6H-cyclopenta[a]phenanthren-3-yl ester 、 alkaline earth salt of/the/ methylsulfuric acid 在
palladium diacetate
吡啶 、
1,1'-双(二苯基膦)二茂铁 作用下,
反应 0.33h,
以86%的产率得到3-Carboxy-oestra-1.3.5(10)-trien-17-on