Piperidine → Tert-butyl [4-(glycylamino)benzyl]carbamate

Participants

Reaction Steps

To a solution of #B118 (7.0 g, 14.0 mmol, 1.0 eq) in DMF (70 mL) was added piperidine (4.7 mL, 47.5 mmol, 3.4 eq.) at room temperature. The mixture was stirred at room temperature for 30 min, evaporated in vacuo. The residue was washed with petroleum ether (100 mL×2) and re-crystallized from EtOAc (50 mL) and petroleum ether (200 mL) to gave #B119 (3.3 g, 84.6%) as a white solid. 1H NMR (400 Hz, CDCl3): δ 9.37 (s, 1H), 7.57 (d, 2H), 7.25 (d, 2H), 4.80 (br, 1H), 4.27 (d, 2H), 3.47 (s, 2H), 1.45 (s, 9H)

Provenance & Evidence