tert-butyl N-[(2S)-1-[[(2S)-6-[[(2S)-2,6-bis[(2-methylpropan-2-yl)oxycarbonylamino]hexanoyl]amino]-1-oxo-1-(prop-2-ynylamino)hexan-2-yl]amino]-6-[(2-methylpropan-2-yl)oxycarbonylamino]-1-oxohexan-2-yl]carbamate 、
dimethyl (2S)-2-[[(3S)-3-[[3-(azidomethyl)-5-[[(2S)-1,4-bis[[(2S)-1,4-dimethoxy-1,4-dioxobutan-2-yl]amino]-1,4-dioxobutan-2-yl]carbamoyl]benzoyl]amino]-4-[[(2S)-1,4-dimethoxy-1,4-dioxobutan-2-yl]amino]-4-oxobutanoyl]amino]butanedioate 在
copper(l) iodide 、
N,N-二异丙基乙胺 作用下,
以
乙腈 为溶剂,
以90%的产率得到dimethyl (2S)-2-[[(3S)-3-[[3-[[4-[[[(2S)-2,6-bis[[(2S)-2,6-bis[(2-methylpropan-2-yl)oxycarbonylamino]hexanoyl]amino]hexanoyl]amino]methyl]triazol-1-yl]methyl]-5-[[(2S)-1,4-bis[[(2S)-1,4-dimethoxy-1,4-dioxobutan-2-yl]amino]-1,4-dioxobutan-2-yl]carbamoyl]benzoyl]amino]-4-[[(2S)-1,4-dimethoxy-1,4-dioxobutan-2-yl]amino]-4-oxobutanoyl]amino]butanedioate