反应详情

温度

0 °C

To a solution of 4-[1-Benzyl-4-(3-methoxy-phenyl)-piperidin-4-yl]-benzoic acid hydrazide (0.7 g, 1.69 mmol) in CH2Cl2 (10 mL) at 0° C. was added triethylamine (0.35 mL, 2.5 mmol) was catalytic DMAP (20 mg) and cyclobutane carbonyl chloride (0.19 mL, 1.69 mmol). The mixture was stirred at 0° C. for 1 hour and at room temperature for 5 hours. The solution was washed with brine (5 mL), dried (MgSO4) and concentrated. Purification by flash chromatography with hexanes/EtOAc (6:4) afforded 0.63 g (75% yield) of cyclobutanecarboxylic acid N′-{4-[1-benzyl-4-(3-methoxy-phenyl)-piperidin-4-yl]-benzoyl}-hydrazide. 1HNMR (400 MHz, CDCl3) δ 8.59 (s, 1H), 7.67 (d, 2H), 7.41-7.08 (comp, 8H), 6.82-6.61 (comp, 3H), 3.79 (s, 3H), 2.41 (s, 2H), 3.09-3.02 (m, 1H), 2.41-2.23 (comp, 8H), 2.19-1.67 (comp, 6H); MS (M+1) 498.2.

1. washThe solution was washed with brine (5 mL)
2. dry with materialdried (MgSO4)
3. concentrationconcentrated
4. customPurification by flash chromatography with hexanes/EtOAc (6:4)