反应详情

温度

40 °C

A mixture of 5-bromopicolinic acid (0.40 g, 2.0 mmol) and CDI (0.36 g, 2.2 mmol) in DMF (20 mL) was stirred under nitrogen at 40° C. for 2 hours. Then, 5-aminomethyl-2-[(3S)-3-methyl-2,6-dioxo-piperidin-3-yl]-isoindole-1,3-dione hydrochloride (0.67 g, 2.0 mmol) was added, and the mixture was stirred at this temperature for an additional 2 hours. The mixture was cooled to room temperature, and the solvent was evaporated under vacuum. The residue was dissolved in ethyl acetate (100 mL) and washed with saturated aqueous sodium bicarbonate solution (2×100 mL). The organic phase was evaporated. The residue was chromatographed on silica gel using methylene chloride as the mobile phase. A pale red solid was obtained; this material was triturated in 10 mL of acetonitrile for 16 hours. The solid was filtered and washed with an additional 7 mL of acetonitrile. The product was dried under vacuum, providing 0.55 g (57% yield) as a white solid; mp 260-262° C.; HPLC, Waters Symmetry C-18, 3.9×150 mm, 5 μm, 1 mL/min, 240 nm, 45/55 CH3CN/0.1% H3PO4, 3.61 (96.62%); 1H NMR (DMSO-d6) δ 1.88 (s, 3H), 2.00-2.08 (m, 1H), 2.49-2.62 (m, 2H), 2.65-2.73 (m, 1H), 4.62 (d, J=6.3 Hz, 2H), 7.76-7.82 (m, 3H), 7.97 (dd, J=8.4 Hz, J=0.6 Hz, 1H), 8.26 (dd, J=8.4 Hz, J=2.3 Hz, 1H), 8.81 (dd, J=2.3 Hz, J=0.6 Hz, 1H), 9.63 (t, J=6.3 Hz, 1H), 11.00 (s, 1H); 13C NMR (DMSO-d6) δ 21.0, 28.5, 29.1, 42.4, 58.7, 121.8, 123.1, 123.5, 123.9, 129.6, 131.3, 133.6, 140.5, 147.1, 148.5, 149.3, 163.5, 167.7, 167.8, 172.0, 172.1; Anal. Calcd for C21H17BrN4O5: C, 51.97; H, 3.53; N, 11.55. Found: C, 52.05; H, 3.44; N, 11.39.

1. stirringthe mixture was stirred at this temperature for an additional 2 hours
2. temperatureThe mixture was cooled to room temperature
3. customthe solvent was evaporated under vacuum
4. dissolutionThe residue was dissolved in ethyl acetate (100 mL)
5. washwashed with saturated aqueous sodium bicarbonate solution (2×100 mL)
6. customThe organic phase was evaporated
7. customThe residue was chromatographed on silica gel
8. customA pale red solid was obtained
9. customthis material was triturated in 10 mL of acetonitrile for 16 hours
10. filtrationThe solid was filtered
11. washwashed with an additional 7 mL of acetonitrile
12. customThe product was dried under vacuum
13. customproviding 0.55 g (57% yield) as a white solid