ethyl 6-[(3R,4R)-4-{[(4-chlorophenyl)carbonyl](methyl)amino}-3-(3,4-dichlorophenyl)piperidin-1-yl]pyridine-3-carboxylate 、
sodium hydroxide 在
resultant product 、
乙酸乙酯 、 Brine 、 silica gel 、
ethyl acetate n-hexane 作用下,
以
甲醇 为溶剂,
反应 10.0h,
以to give the title compound (0.474 g, 100%) as a white powder的产率得到6-[(3R,4R)-4-{[(4-chlorophenyl)carbonyl](methyl)amino}-3-(3,4-dichlorophenyl)piperidin-1-yl]pyridine-3-carboxylic acid