反应详情

A mixture of 4-amino-2-(2,6-dioxo(3-piperidyl))isoindoline-1,3-dione (1.1 g, 4.0 mmol) and 4-fluorobenzoyl chloride (0.95 mL, 8.0 mmol) in THF (40 mL) was heated to reflux for 15 h. To the mixture was added methanol (5 mL) to give a suspension. The suspension was filtered and washed with ether (2×10 mL) then methanol (5 mL) to give N-[2-(2,6-dioxo-piperidin-3-yl)-1,3-dioxo-2,3-dihydro-1H-isoindol-4-yl]-4-fluoro-benzamide as a yellow solid (1.2 g, 77% yield): mp, 283–285° C.; 1H NMR (DMSO-d6) δ 2.06–2.10 (m, 1H, CHH), 2.48–2.65 (m, 2H, CH2), 2.83–2.97 (m, 1H, CHH), 5.18 (dd, J=5.4, 12.6 Hz, 1H, NCH), 7.42–7.49 (m, 2H, Ar), 7.69 (d, J=7.2, Hz, 1H, Ar), 7.91 (t, J=8.2 Hz, 1H, Ar), 8.03–8.08 (m, 2H, Ar), 8.54 (d, J=8.3 Hz, 1H, Ar), 10.41 (s, 1H, NH), 11.15 (s, 1H, NH); 13C NMR (DMSO-d6) δ 22.10, 30.98, 49.29, 115.96 (d, JC-F=22 Hz); 118.03, 118.67, 128.09 (d, JC-F=235 Hz), 130.12, 131.49, 136.18, 136.75, 162.70, 164.08, 166.56, 168.22, 169.29, 172.27; Anal Calcd for C20H14N3O5F+0.2 H2O: C, 60.21; H, 3.64; N, 10.53; F, 4.76; H2O, 0.90. Found: C, 60.17; H, 3.55; N, 10.47; F, 4.90; H2O, 0.95.

1. temperaturewas heated
2. temperatureto reflux for 15 h
3. customto give a suspension
4. filtrationThe suspension was filtered
5. washwashed with ether (2×10 mL)