반응 단계
To a stirred mixture of 5-aminomethyl-2-(3-methyl-2,6-dioxo-piperidin-3-yl)-isoindole-1,3-dione hydrochloride (0.50 g, 1.50 mmol) and 3-chloro-4-methyl-phenyl isocyanate (0.25 g, 1.50 mmol) in THF (25 mL), was added triethylamine (0.42 mL, 3.00 mmol) at room temperature under nitrogen. After 2 h, 2% aq. HCl (75 mL) was added. The product was extracted with EtOAc (75 mL) and the organic layer was separated and washed with water (2×75 mL), dried (MgSO4) and concentrated in vacuo to give 1-(3-chloro-4-methyl-phenyl)-3-[2-(3-methyl-2,6-dioxo-piperidin-3-yl)-1,3-dioxo-2,3-dihydro-1H-isoindol-5-ylmethyl]-urea as a white solid (0.40 g, 58% yield): HPLC: Waters Symmetry C18, 5 μm, 3.9×150 mm, 1 mL/min, 240 nm, 50/50 CH3CN/0.1% H3PO4, 4.37 min (98.73%); mp: 232-234° C.; 1H NMR (DMSO-d6) δ 1.89 (s, 3H), 1.98-2.13 (m, 1H), 2.23 (s, 3H), 2.52-2.79 (m, 3H), 4.44 (d, J=6.0 Hz, 2H), 6.89 (t, J=5.9 Hz, 1H), 7.08-7.21 (m, 2H), 7.64 (d, J=1.9 Hz, 1H), 7.72-7.88 (m, 3H), 8.82 (s, 1H), 11.01 (s, 1H); 13C NMR (DMSO-d6) δ 18.74, 21.02, 28.58, 29.11, 42.65, 58.76, 116.53, 117.74, 121.37, 123.13, 127.53, 129.49, 131.02, 131.37, 132.97, 133.21, 139.49, 148.47, 155.10, 167.77, 167.93, 172.13, 172.21; LCMS: MH=469/471; Anal Calcd for C23H21ClN4O5: C, 58.91; H, 4.51; N, 11.95. Found: C, 58.63; H, 4.40; N, 11.82.
