(1R,2S,5S)-3-((S)-2-tert-butoxycarbonylamino-3,3-dimethylbutyryl)-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxylic acid 、 3-amino-4-cyclopropyl-2-hydroxy-N-prop-2-enylbutanamide;hydrochloride 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
DMF (N,N-dimethyl-formamide) 为溶剂,
以77%的产率得到tert-butyl N-[(2S)-1-[(1R,2S,5S)-2-[[1-cyclopropyl-3-hydroxy-4-oxo-4-(prop-2-enylamino)butan-2-yl]carbamoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexan-3-yl]-3,3-dimethyl-1-oxobutan-2-yl]carbamate