、
三氟乙酸 以
二氯甲烷 为溶剂,
以83%的产率得到(3S,6S,7R,9aS)-7-[[3-[[2-[[3-[[(3S,6S,7R,9aS)-3-(benzhydrylcarbamoyl)-6-[[(2S)-2-(methylamino)butanoyl]amino]-5-oxo-1,2,3,6,7,8,9,9a-octahydropyrrolo[1,2-a]azepin-7-yl]methylamino]-3-oxopropyl]amino]-3,4-dioxocyclobuten-1-yl]amino]propanoylamino]methyl]-N-benzhydryl-6-[[(2S)-2-(methylamino)butanoyl]amino]-5-oxo-1,2,3,6,7,8,9,9a-octahydropyrrolo[1,2-a]azepine-3-carboxamide;2,2,2-trifluoroacetic acid