To a stirred solution of amide (1.0 equiv.) in MeOH (0.05 M) at room temperature was added dropwise a large excess of HCl and the reaction mixture was heated during 2 h. After cooling down to room temperature, the solvent was removed under reduced pressure. The crude residue was solubilized in DCM and the same volume of a saturated aqueous solution of Na2CO3 was added. The mixture was stirred for 2 h at room temperature, then the organic layer was separated and the aqueous layer was extracted with DCM. The combined organic layers were dried over MgSO4, filtered, and concentrated under reduced pressure. Finally, the crude residue was purified by flash chromatography on silica gel affording the expected amine.