(1R,2S,5S)-methyl 3-((S)-2-amino-3,3-dimethylbutanoyl)-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxylate hydrochloride 、
(2S)-2-(1-isocyanatocyclohexyl)thiolane 1,1-dioxide 在
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
生成 methyl (1R,5S)-3-[3,3-dimethyl-1-oxo-2(S)-[[[[1-(tetrahydro-1,1-dioxido-2(S)-thienyl)cyclohexyl]amino]carbonyl]amino]butyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2(S)-carboxylate