A mixture of tert-butyl (R)-3-azido pyrrolidine-1-carboxylate (250 mg, 1.18 mmol) and Pd/C (50 mg, 10% w/w) in methanol (10 mL) was reacted with stirring at room temperature for 12 h under hydrogen atmosphere. Upon completion of the reaction, the catalyst was removed by filtration and the filtrate was concentrated to afford tert-butyl (R)-3-aminopyrrolidine-1-carboxylate as a colorless liquid (210 mg, 96% yield). The product was characterized by 1H NMR (600 MHz, CDCl3): δ 3.33-3.49 (m, 3H), 3.27-3.32 (m, 1H), 2.95-3.03 (m, 1H), 1.98-2.08 (m, 1H), 1.63-1.70 (m, 1H), 1.41 (s, 9H). Mass spectrometry (MS-ESI) analysis showed: m/z 131.20 [M-55]+.
