C(OC(=O)[NH:7][CH:8]([CH2:35][C:36]1[CH:41]=[CH:40][C:39]([Cl:42])=[CH:38][CH:37]=1)[C:9]([N:11]1[CH2:16][CH2:15][N:14]([CH:17]([C:29](=[O:32])[NH:30][CH3:31])[CH2:18][C:19]2[CH:28]=[CH:27][C:26]3[C:21](=[CH:22][CH:23]=[CH:24][CH:25]=3)[CH:20]=2)[CH2:13][CH:12]1[CH2:33][CH3:34])=[O:10])(C)(C)C.ClCCCl>Cl.O1CCOCC1>[ClH:42].[NH2:7][CH:8]([CH2:35][C:36]1[CH:41]=[CH:40][C:39]([Cl:42])=[CH:38][CH:37]=1)[C:9]([N:11]1[CH2:16][CH2:15][N:14]([CH:17]([CH2:18][C:19]2[CH:28]=[CH:27][C:26]3[C:21](=[CH:22][CH:23]=[CH:24][CH:25]=3)[CH:20]=2)[C:29]([NH:30][CH3:31])=[O:32])[CH2:13][CH:12]1[CH2:33][CH3:34])=[O:10]{1-(4-Chlorobenzyl)-2-[2-ethyl-4-(1-methylcarbamo yl-2-naphthalen-2-yl-ethyl)-piperazin-1-yl]-2-oxo-ethyl]-carbamic acid tert-butyl ester, 44, (1.0 g, 1.6 mmol) is dissolved in 4M HCl in dioxane (20 mL). The reaction mixture is stirred for 60 minutes then 1,2-dichloroethane (20 mL) is added. Solvent is removed in vacuo to afford 1 g (quantitative yield) of the desired product.
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