2(S)-amino-oct-7-enoic acid ethyl ester hydrochloride 、
(1R,2S,5S)-3-((2S,3S)-3-(allyloxy)-2-(tert-butoxycarbonylamino)butanoyl)-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxylic acid 在
N-甲基吗啉 、 Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
二氯甲烷 、
N,N-二甲基甲酰胺 为溶剂,
以84%的产率得到(S)-methyl 2-((1R,2S,5S)-3-((2S,3S)-3-(allyloxy)-2-(tert-butoxycarbonylamino)butanoyl)-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamido)oct-7-enoate