反応 #10114

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

cyclopentanecarbonyl chloride

→

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

収率 83.2%

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 CH2Cl2 (70 mL)
4. 4
   洗浄The CH2Cl2 solution was washed with 1N HCl (30 mL), H2O (30 mL), brine (30 mL)
5. 5
   乾燥dried (MgSO4)
6. 6
   その他The solvent was removed in vacuo
7. 7
   workup.STIRRINGthe solid was stirred with ether (20 mL)

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 (0.60 g, 1.85 mmol) in CH3CN (50 mL). After stirring for 20 min, cyclopentanecarbonyl chloride (0.29 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 CH2Cl2 (70 mL). The CH2Cl2 solution was washed with 1N HCl (30 mL), H2O (30 mL), brine (30 mL) and dried (MgSO4). The solvent was removed in vacuo and the solid was stirred with ether (20 mL) to give N-{[2-(2,6-dioxo(3-piperidyl))-1,3-dioxoisoindolin-4-yl]methyl}cyclopentylcarboxamide (0.59 g, 83%) as a white solid: mp 175–177° C.; 1H NMR (DMSO-d6) δ 11.13 (s, 1H), 8.41 (t, J=5.7 Hz, 1H), 7.87–7.78 (m, 2H), 7.66–7.63 (m, 1H), 5.19–5.12 (dd, J=5.3 and 12.5 Hz, 1H), 4.72 (d, J=5.8 Hz, 2H), 2.98–2.83 (m, 1H), 2.73–2.51 (m, 3H), 2.08–2.04 (m, 1H), 1.81–1.51 (m, 8H); 13C NMR (DMSO-d6) δ 175.71, 172.75, 169.82, 167.49, 166.95, 139.68, 134.76, 132.91, 131.50, 127.01, 121.77, 48.84, 44.20, 37.60, 30.93, 29.96, 25.60, 21.97; Anal. Calcd. For C20H21N3O5: C, 62.65; H, 5.52; N, 10.96. Found: C, 62.52; H, 5.55; N, 10.81.

出典