反应详情

(3R)-5-oxo-4-(phenylmethyl)-3-morpholinecarboxylic acid (3.67 g, 15.6 mmol) and 1-hydroxybenzotriazole (2.53 g, 18.7 mmol) in DCM (50 mL) cooled to 0° C. N-Methylmorpholine (8.50 mL, 77.3 mmol), benzylamine (1.87 mL, 17.2 mmol) and 1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride (3.26 g, 17.2 mmol) added sequentially. The reaction was stirred at rt overnight, washed with H2O (50 mL), 6N HCl (30 mL), H2O (50 mL) and dried over MgSO4 to provide the title compound of step C (5.09 g, 15.6 mmol, 100%). 1H NMR (400 MHz, DMSO-d6) δ ppm 3.59 (d, J=15.2 Hz, 1H), 3.82 (t, J=2.9 Hz, 1H), 3.86-3.97 (m, 2H), 4.07-4.17 (m, 2H), 4.23-4.34 (m, 2H), 5.30 (d, J=15.4 Hz, 1H), 7.17-7.22 (m, 5H), 7.24-7.32 (m, 5H), 8.60 (t, J=5.6 Hz, 1H).

1. washwashed with H2O (50 mL), 6N HCl (30 mL), H2O (50 mL)
2. dry with materialdried over MgSO4