(1R,2S,5S)-N-(4-amino-1-cyclopropyl-3,4-dioxobutan-2-yl)-3-[(2S)-2-isocyanato-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide 、 (S)-3-((2-amino-2-cyclohexylethyl)(methyl)amino)-4-(dimethylamino)cyclobut-3-ene-1,2-dione hydrochloride 在
N,N-二异丙基乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以10%的产率得到(1R,2S,5S)-N-(4-amino-1-cyclopropyl-3,4-dioxobutan-2-yl)-3-[(2S)-2-[[(1S)-1-cyclohexyl-2-[[2-(dimethylamino)-3,4-dioxocyclobuten-1-yl]-methylamino]ethyl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide