[CH3:1][N:2]1[CH2:6][CH2:5][C@@H:4]([NH:7]C(=O)OC(C)(C)C)[CH2:3]1.[ClH:15]>O1CCOCC1>[ClH:15].[ClH:15].[CH3:1][N:2]1[CH2:6][CH2:5][C@@H:4]([NH2:7])[CH2:3]1tert-butyl N-[(3R)-1-methylpyrrolidin-3-yl]carbamate (Intermediate 185; 1.18 g, 5.67 mmol) was dissolved in 1,4-dioxane (10 mL) and 4M HCl in dioxane (10 mL) added. The mixture was stirred at room temperature for 1 hour and then concentrated to yield the title compound as a white hygroscopic solid (810 mg, 100%).
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