tert-butyl (2S)-2-[({[(3S,4S)-6-acetyl-4-[(3-chloro-4-fluorobenzene)amido]-2,2-dimethyl-3,4-dihydro-2H-1-benzopyran-3-yl]oxy}carbonyl)amino]-6-{[(tert-butoxy)carbonyl]amino}hexanoate 在
三氟乙酸 作用下,
反应 6.0h,
以96%的产率得到(2S)-2-[({[(3S,4S)-6-acetyl-4-[(3-chloro-4-fluorobenzene)amido]-2,2-dimethyl-3,4-dihydro-2H-1-benzopyran-3-yl]oxy}carbonyl)amino]-6-aminohexanoic acid hydrochloride