Methyl chloroglyoxylate → Methyl 2-[[2-(2,6-dioxo-3-piperidyl)-1,3-dioxo-isoindolin-4-yl]amino]-2-oxo-acetate
反応式
[NH2:1][C:2]1[CH:10]=[CH:9][CH:8]=[C:7]2[C:3]=1[C:4](=[O:20])[N:5]([CH:12]1[CH2:17][CH2:16][C:15](=[O:18])[NH:14][C:13]1=[O:19])[C:6]2=[O:11].Cl[C:22]([C:24]([O:26][CH3:27])=[O:25])=[O:23]>C1COCC1>[O:19]=[C:13]1[CH:12]([N:5]2[C:4](=[O:20])[C:3]3[C:7](=[CH:8][CH:9]=[CH:10][C:2]=3[NH:1][C:22]([C:24]([O:26][CH3:27])=[O:25])=[O:23])[C:6]2=[O:11])[CH2:17][CH2:16][C:15](=[O:18])[NH:14]1参加物
4
実験手順
To a stirred suspension of 4-amino-2-(2,6-dioxo(3-piperidyl))isoindoline-1,3-dione (0.55 g, 2.0 mmol) in THF (30 ml) was added methyl (chlorocarbonyl)formate (0.49 g, 4.0 mmol). The mixture was heated to reflux for 18 hours. The solvent was evaporated in vacuo and the resulting solid was slurried in diethyl ether (20 ml) and filtered to give 0.55 g (76%) of product as an off-white solid: mp 247–249° C.; 1H NMR (DMSO-d6) δ 11.17 (s, 1H), 10.81 (s, 1H), 8.59 (d, J=8.3 Hz, 1H), 7.92 (t, J=7.7 Hz, 1H), 7.70 (d, J=7.3 Hz, 1H), 5.19 (dd, J=5.0 and 12.5 Hz, 1H), 3.91 (s, 3H), 2.98–2.85 (m, 1H), 2.68–2.50 (m, 2H), 2.14–2.09 (m, 1H); 13C NMR (DMSO-d6) δ 172.70, 169.63, 168.03, 166.45, 159.81, 154.57, 136.65, 134.93, 131.36, 124.67, 119.34, 117.17, 53.80, 49.06, 30.92, 21.94; Anal. Calcd. For C18H13N3O7: C, 53.49; H, 3.65; N, 11.70. Found: C, 53.53; H, 3.66; N, 11.52.