C(OC([NH:8][CH:9]([C:11]1[S:12][C:13]([C:16]([O:18][CH2:19][C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)=[O:17])=[CH:14][N:15]=1)[CH3:10])=O)(C)(C)C.[ClH:26]>C1COCC1.O1CCOCC1>[ClH:26].[NH2:8][CH:9]([C:11]1[S:12][C:13]([C:16]([O:18][CH2:19][C:20]2[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=2)=[O:17])=[CH:14][N:15]=1)[CH3:10]To a solution of benzyl 2-(1-(tert-butoxycarbonylamino)ethyl)thiazole-5-carboxylate (0.55 g, 0.55 mmol) in THF (2 mL) was added 4M HCl in dioxane (0.5 ml). The reaction solution was stirred at room temperature overnight. The solution was concentrated to dryness to afford a colorless oil (0.45 g, 100%). LC-MS: (FA) ES+ 263.
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