methyl (1R,4aS,10aR)-1,4a-dimethyl-6-(phenylcarbamoylamino)-7-propan-2-yl-2,3,4,9,10,10a-hexahydrophenanthrene-1-carboxylate 在
potassium tert-butylate 作用下,
以
二甲基亚砜 为溶剂,
生成
(1R,4aS,10aR)-1,4a-dimethyl-6-(phenylcarbamoylamino)-7-propan-2-yl-2,3,4,9,10,10a-hexahydrophenanthrene-1-carboxylic acid