2-(2,6-二氧哌啶-3-基)-4-甲基异吲哚-1,3-二酮

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A stirred solution of 3-methylphthalic anhydride (2.96 g, 18.2 mmol), 3-aminopiperidine-2,6-dione hydrogen chloride (3.00 g, 18.2 mmol) and sodium acetate (1.57 g, 19.1 mmol) in acetic acid (30 mL) was heated at reflux for 23 hours. The solvent was removed in vacuo to give a solid which was stirred with water (40 mL) for 1 hour, filtered, washed with water (30 mL), and then heated with decolorizing charcoal (1 g) in acetone (2 L) at reflux temperature for 30 min. The suspension was filtered through a pad of Celite to give a clear solution. The solvent of filtrate was removed in vacuo to give 2-(2,6-dioxopiperid-3-yl)-4-methylisoindoline-1,3-dione as a white solid (4.08 g, 82% yield); mp 290.0-292.0° C.; 1H NMR (DMSO-d6); δ2.03-2.09 (m, 1H, CHH), 2.50-2.60 (m, 2H, CH2), 2.63 (s, 3H, CH3), 2.83-2.95 (m, IH, CHH), 5.13 (dd, J=5.4,12.3 Hz, IH, NCH), 7.65-7.79 (m, 3H, Ar), 11.13 (br s, IH, NH); 13C NMR (DMSO-d6) δ17.04, 21.99, 30.93, 48.76, 121.05, 127.89, 131.63, 134.37, 136.91, 137.61, 167.04, 167.83, 169.87, 172.74; Anal Calcd for C14H12N2O4: C, 61.76; H, 4.44; N, 10.29. Found: C, 61.68; H, 4.37; N, 10.17. at reflux for 23 hours The solvent was removed in vacuo to give a solid which filtered washed with water (30 mL) heated with decolorizing charcoal (1 g) in acetone (2 L) at reflux temperature for 30 min The suspension was filtered through a pad of Celite to give a clear solution The solvent of filtrate was removed in vacuo

反应条件: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: A stirred solution of 3-methylphthalic anhydride (2.96 g, 18.2 mmol), 3-aminopiperidine-2,6-dione hydrogen chloride (3.00 g, 18.2 mmol) and sodium acetate (1.57 g, 19.1 mmol) in acetic acid (30 mL) was heated at reflux for 23 hours. The solvent was removed in vacuo to give a solid which was stirred with water (40 mL) for 1 hour, filtered, washed with water (30 mL), and then heated with decolorizing charcoal (1 g) in acetone (2 L) at reflux temperature for 30 min. The suspension was filtered through a pad of Celite to give a clear solution. The solvent of filtrate was removed in vacuo to give 2-(2,6-dioxopiperid-3-yl)-4-methylisoindoline-1,3-dione as a white solid (4.08 g, 82% yield)-mp 290.0-292.0° C.; 1H NMR (DMSO-d6); δ 2.03-2.09 (m, 1H, CHH), 2.50-2.60 (m, 2H, CH2), 2.63 (s, 3H, CH3), 2.83-2.95 (m, 1H, CHH), 5.13 (dd, J=5.4, 12.3 Hz, 1H, NCH), 7.65-7.79 (m, 3H, Ar), 11.13 (br s, 1H, NH); 13C NMR (DMSO-d6) δ 17.04, 21.99, 30.93, 48.76, 121.05, 127.89, 131.63, 134.37, 136.91, 137.61, 167.04, 167.83, 169.87, 172.74; Anal Calcd for C14H12N2O4: C, 61.76; H, 4.44; N, 10.29. Found: C, 61.68; H, 4.37; N, 10.17. at reflux for 23 hours The solvent was removed in vacuo to give a solid which filtered washed with water (30 mL) heated with decolorizing charcoal (1 g) in acetone (2 L) at reflux temperature for 30 min The suspension was filtered through a pad of Celite to give a clear solution The solvent of filtrate was removed in vacuo