(2S,3Z)-5-{[(2R,3R,5S,6S)-6-{(2E,4E)-5-[(3R,4R,5R,7S)-7-{2-[(2,5-dioxopyrrolidin-1-yl)oxy]-2-oxoethyl}-4-hydroxy-1,6-dioxaspiro[2.5]oct-5-yl]-3-methylpenta-2,4-dien-1-yl}-2,5-dimethyltetrahydro-2H-pyran-3-yl]amino}-5-oxopent-3-en-2-yl acetate 、
N-(6-{[(9H-fluoren-9-ylmethoxy)carbonyl]amino}hexanoyl)-L-valyl-N-5-carbamoyl-N-(4-{[(piperazin-1-ylcarbonyl)oxy]methyl}phenyl)-L-ornithinamide 在
N,N'-二环己基碳二亚胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 1.5h,
以55%的产率得到N-(6-{[(9H-fluoren-9-ylmethoxy)carbonyl]amino}hexanoyl)-L-valyl-N-[4-({[(4-{[(3R,5S,7R,8R)-7-{(1E,3E)-5-[(2S,3S,5R,6R)-5-{[(2Z,4S)-4-(acetyloxy)pent-2-enoyl]amino}-3,6-dimethyltetrahydro-2H-pyran-2-yl]-3-methylpenta-1,3-dien-1-yl}-8-hydroxy-1,6-dioxaspiro[2.5]oct-5-yl]acetyl}piperazin-1-yl)carbonyl]oxy}methyl)phenyl]-N-5-carbamoyl-L-ornithinamide