C([N:8](CC1C=CC=CC=1)[C@@H:9]1[CH2:14][N:13]([CH3:15])[C:12](=[O:16])[CH2:11][CH2:10]1)C1C=CC=CC=1>CO.[Pd]>[NH2:8][C@@H:9]1[CH2:14][N:13]([CH3:15])[C:12](=[O:16])[CH2:11][CH2:10]10.450 g (S)-5-dibenzylamino-1-methylpiperidin-2-one are suspended in 25 ml of methanol and hydrogenated with 0.150 g Pd/C 10% at a pressure of 3 bar and a temperature of 60° C. After 16 hours the catalyst is suction filtered and the filtrate is evaporated to dryness. 0.190 g of the product are obtained as an oil. 1H NMR (400 MHz, DMSO): 2.76 (3H, s).
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