(S)-2-((S)-2-Cyclohexyl-2-isobutoxycarbonylamino-acetyl)-2-aza-spiro[4.4]nonane-3-carboxylic acid 在
戴斯-马丁氧化剂 、
N,N-二异丙基乙胺 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以
二氯甲烷 为溶剂,
生成 2-methylpropyl N-[(1S)-1-cyclohexyl-2-[(3S)-3-({1-[({[(S)-(dimethylcarbamoyl)(phenyl)methyl]carbamoyl}methyl)carbamoyl]-1-oxopentan-2-yl}carbamoyl)-2-azaspiro[4.4]nonan-2-yl]-2-oxoethyl]carbamate