(S)-2-[(R)-2-(4-tert-Butylcarbamoyl-4-cyclohexyl-piperidin-1-yl)-1-(4-fluoro-benzyl)-2-oxo-ethylcarbamoyl]-5-ethyl-4-methyl-piperazine-1-carboxylic acid tert-butyl ester 在
三氟乙酸 作用下,
以
二氯甲烷 为溶剂,
生成 (2S,5R)-5-Ethyl-4-methyl-piperazine-2-carboxylic acid [(R)-2-(4-tert-butylcarbamoyl-4-cyclohexyl-piperidin-1-yl)-1-(4-fluoro-benzyl)-2-oxo-ethyl]-amide 、 (2S,5S)-5-Ethyl-4-methyl-piperazine-2-carboxylic acid [(R)-2-(4-tert-butylcarbamoyl-4-cyclohexyl-piperidin-1-yl)-1-(4-fluoro-benzyl)-2-oxo-ethyl]-amide