(5R,8S)-7-((S)-2-{(S)-2-cyclohexyl-2-[((S)-1-isopropyl-piperidine-2-carbonyl)-amino]-acetylamino}3,3-dimethyl-butyryl)-10,10-dimethyl-7-aza-dispiro[3.0.4.1]decane-8-carboxylic acid 、 在
N,N-二异丙基乙胺 、 Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以3%的产率得到(5R,8S)-7-[(2S)-2-[[(2S)-2-cyclohexyl-2-[[(2S)-1-propan-2-ylpiperidine-2-carbonyl]amino]acetyl]amino]-3,3-dimethylbutanoyl]-N-[(1R,2R)-1-(diethylsulfamoylcarbamoyl)-2-ethylcyclopropyl]-10,10-dimethyl-7-azadispiro[3.0.45.14]decane-8-carboxamide