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

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.

1. stirringThe mixture was stirred at room temperature for 17 hours
2. customThe solvent was removed in vacuo
3. dissolutionthe residue was dissolved in CH2Cl2 (70 mL)
4. washThe CH2Cl2 solution was washed with 1N HCl (30 mL), H2O (30 mL), brine (30 mL)
5. dry with materialdried (MgSO4)
6. customThe solvent was removed in vacuo
7. stirringthe solid was stirred with ether (20 mL)

ORDレコード

ord-f513d2b829dd4a85aafd15c1d0f103dd

出典データセット

uspto-grants-2011_09

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US08012997B2