tert-butyl (2S)-3-methyl-2-[[(2R)-4-methyl-2-[[2-oxo-3-[[(2S)-4-phenyl-2-(phenylmethoxycarbonylamino)butanoyl]amino]pentanoyl]amino]pentanoyl]amino]butanoate 在
三氟乙酸 作用下,
反应 2.0h,
以58.5%的产率得到(2S)-3-methyl-2-[[(2R)-4-methyl-2-[[2-oxo-3-[[(2S)-4-phenyl-2-(phenylmethoxycarbonylamino)butanoyl]amino]pentanoyl]amino]pentanoyl]amino]butanoic acid