4-Methoxybenzylamine → 1-(4-Methoxy-benzyl)-4-(4-nitro-phenyl)-piperidine-2,6-dione
反応式
[N+:1]([C:4]1[CH:9]=[CH:8][C:7]([CH:10]2[CH2:15][C:14](=[O:16])O[C:12](=[O:17])[CH2:11]2)=[CH:6][CH:5]=1)([O-:3])=[O:2].[CH3:18][O:19][C:20]1[CH:27]=[CH:26][C:23]([CH2:24][NH2:25])=[CH:22][CH:21]=1>C1COCC1>[CH3:18][O:19][C:20]1[CH:27]=[CH:26][C:23]([CH2:24][N:25]2[C:12](=[O:17])[CH2:11][CH:10]([C:7]3[CH:6]=[CH:5][C:4]([N+:1]([O-:3])=[O:2])=[CH:9][CH:8]=3)[CH2:15][C:14]2=[O:16])=[CH:22][CH:21]=1参加物
4
反応条件
- 温度
- 85 °C
実験手順
A solution of 12.6 g (53.6 mmol) of 4-(4-nitro-phenyl)-dihydro-pyran-2,6-dione (as prepared in the previous step) in THF (160 mL) was treated with 9.04 mL (6.96 mmol) of 4-methoxy-benzylamine at RT for 2 h. Solvents were evaporated in vacuo. The residue was dissolved in 1.0 N HCl (200 mL) and extracted with EtOAc (2×250 mL). The combined organic layers were washed with water (1×200 mL), dried (MgSO4) and concentrated in vacuo. The residue was treated with acetic anhydride (200 mL) and triethylamine (30 mL), and heated to 85° C. for 1.5 h. The mixture was concentrated in vacuo, treated with 1.0 N HCl (200 mL), and extracted with EtOAc (3×200 mL). The combined organic layers were washed with saturated aqueous NaHCO3 (1×200 mL) and water (1×200 mL), dried (MgSO4), and concentrated in vacuo. The solid was triturated with hexane using sonication, filtered and air-dried to afford 16.5 g (87%) of the title compound as light tan solid: Mass spectrum (ESI, m/z): Calcd. for C19H21N2O, 325.1 (M-OCH3+2H). found 325.0.