methyl (3S)-5-methyl-2-methylidene-3-[[(3S)-2-methylidene-3-[(2-methylpropan-2-yl)oxycarbonylamino]butanoyl]amino]hexanoate 在
1-羟基苯并三唑 、
1-(3-二甲基氨基丙基)-3-乙基碳二亚胺 、
三氟乙酸 作用下,
以
二氯甲烷 为溶剂,
生成 methyl (3S)-5-methyl-2-methylidene-3-[[(3S)-2-methylidene-3-[[(3S)-4-methyl-2-methylidene-3-[[(3S)-5-methyl-2-methylidene-3-[[(3S)-2-methylidene-3-[[(3S)-4-methyl-2-methylidene-3-[(2-methylpropan-2-yl)oxycarbonylamino]pentanoyl]amino]butanoyl]amino]hexanoyl]amino]pentanoyl]amino]butanoyl]amino]hexanoate