(1R,2S,5S)-N-(4-amino-1-cyclobutyl-3-hydroxy-4-oxobutan-2-yl)-3-[(2S)-2-[[(2S)-3,3-dimethyl-1-(5-methyl-1,1-dioxo-1,2,5-thiadiazolidin-2-yl)butan-2-yl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide 在
二氯乙酸 、
盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 作用下,
以
DMF (N,N-dimethyl-formamide) 、
甲苯 为溶剂,
反应 3.08h,
以43%的产率得到(1R,2S,5S)-N-(4-amino-1-cyclobutyl-3,4-dioxobutan-2-yl)-3-[(2S)-2-[[(2S)-3,3-dimethyl-1-(5-methyl-1,1-dioxo-1,2,5-thiadiazolidin-2-yl)butan-2-yl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide