C(OC([NH:8][C:9]([CH3:59])([CH2:35][C:36]1[CH:41]=[CH:40][CH:39]=[C:38]([CH2:42][CH2:43][CH:44]([NH:51]C(OC(C)(C)C)=O)[C:45]2[CH:50]=[CH:49][CH:48]=[CH:47][CH:46]=2)[CH:37]=1)[C:10]([O:12][CH2:13][C:14]1[CH:15]=[C:16]([CH:24]=[C:25]([N:27]([S:31]([CH3:34])(=[O:33])=[O:32])[CH2:28][CH2:29][CH3:30])[CH:26]=1)[C:17]([O:19]C(C)(C)C)=[O:18])=[O:11])=O)(C)(C)C.O1CCOCC1.[ClH:66]>>[ClH:66].[ClH:66].[NH2:8][C:9]([CH3:59])([CH2:35][C:36]1[CH:41]=[CH:40][CH:39]=[C:38]([CH2:42][CH2:43][CH:44]([NH2:51])[C:45]2[CH:50]=[CH:49][CH:48]=[CH:47][CH:46]=2)[CH:37]=1)[C:10]([O:12][CH2:13][C:14]1[CH:15]=[C:16]([CH:24]=[C:25]([N:27]([S:31]([CH3:34])(=[O:33])=[O:32])[CH2:28][CH2:29][CH3:30])[CH:26]=1)[C:17]([OH:19])=[O:18])=[O:11]Tert-butyl 3-({[2-[(tert-butoxycarbonyl)amino]-3-(3-{3-[(tert-butoxycarbonyl)amino]-3-phenylpropyl}phenyl)-2-methylpropanoyl]oxy}methyl)-5-[(methylsulfonyl)(propyl)amino]benzoate (0.386 g, 0.461 mmol) was taken up in 2.0 mL HCl in dioxane (2.00 mL, 8.01 mmol, 4.0M solution). After 16 hr., the reaction was concentrated in vacuo, taken up in dichloromethane, and concentrated again (×2) to give 3-[({2-amino-3-[3-(3-amino-3-phenylpropyl)phenyl]-2-methylpropanoyl}oxy)methyl]-5-[(methylsulfonyl)(propyl)amino]benzoic acid dihydrochloride as a white solid.
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