<4R-(4α,5α,9α,10β,13α,14β,15α)>-2,3,4,5,6,9,10,11,12,13,14,15,16,17-Tetradecahydro-4,10,13,14-tetramethyl-17-oxo-1H-cyclopentaphenanthren-4,15-dicarbonsaeure-dimethylester 在
sodium hydroxide 作用下,
以
甲醇 为溶剂,
反应 2.0h,
以97%的产率得到<4R-(4α,5α,9α,10β,13α,14β,15α)>-4-Carboxymethyl-2,3,4,5,6,9,10,11,12,13,14,15,16,17-tetradecahydro-4,10,13,14-tetramethyl-17-oxo-1H-cyclopenta
phenanthren-15-carbonsaeure-methylester