反応 #10112

反応方程式

1,8-Diazabicyclo[5,4,0]undec-7-ene

4-(aminomethyl)-2-(2,6-dioxo(3-piperidyl))isoindoline-1,3-dione hydrochloride

benzoyl chloride

→

N-{[2-(2,6-dioxo(3-piperidyl))-1,3-dioxoisoindolin-4-yl]methyl}benzamide

収率 76.0%

溶媒

CH3CN

反応条件

後処理

1. 1
   workup.STIRRINGThe mixture was stirred at room temperature for 17 hours
2. 2
   その他The solvent was removed in vacuo
3. 3
   workup.DISSOLUTIONthe residue was dissolved in CH2C12 (70 mL)
4. 4
   洗浄The CH2Cl2 solution was washed with H2O (30 mL), brine (30 mL)
5. 5
   乾燥dried (MgSO4)
6. 6
   その他The solvent was removed
7. 7
   その他the residue was purified by chromatography (SiO2, CH2Cl2:EtOAC 6:4)

実験手順

1,8-Diazabicyclo[5,4,0]undec-7-ene (0.62 g, 4.08 mmol) was added to a stirred suspension of 4-(aminomethyl)-2-(2,6-dioxo(3-piperidyl))isoindoline-1,3-dione hydrochloride (0.6 g, 1.85 mmol) in CH3CN (50 mL). After stirring for 20 min, benzoyl chloride (0.31 g, 2.22 mmol) was added. The mixture was stirred at room temperature for 17 hours. The solvent was removed in vacuo and the residue was dissolved in CH2C12 (70 mL). The CH2Cl2 solution was washed with H2O (30 mL), brine (30 mL) and dried (MgSO4). The solvent was removed and the residue was purified by chromatography (SiO2, CH2Cl2:EtOAC 6:4) to give N-{[2-(2,6-dioxo(3-piperidyl))-1,3-dioxoisoindolin-4-yl]methyl}benzamide (0.55 g, 76%) as a white solid: mp 227–229° C.; 1H NMR (DMSO-d6) δ 11.16 (s, 1H), 9.16 (t, J=5.7 Hz, 1H), 7.95–7.72 (m, 5H), 7.60–7.46 (m, 3H), 5.22–5.12 (dd, J=5.4 and 12.8 Hz, 1H), 4.96 (d, J=5.7 Hz, 2H), 2.98–2.85 (m, 1H), 2.65–2.50 (m, 2H), 2.11–2.06 (m, 1H); 13C NMR (DMSO-d6) δ 172.72, 169.80, 167.54, 166.96, 166.60, 139.34, 134.77, 133.92, 133.02, 131.52, 131.42, 128.34, 127.28, 127.12, 121.83, 48.88, 38.32, 30.93, 21.98; Anal. Calcd. For C21H17N3O5: C, 64.45; H, 4.38; N, 10.74. Found: C, 64.47; H, 4.50; N, 10.34.

出典