반응 단계
A mixture of 4-amino-2-(2,6-dioxo(3-piperidyl))isoindoline-1,3-dione (1.1 g, 4.0 mmol) and 4-methylbenzoyl chloride (1.1 g, 8.0 mmol) in THF (40 mL) was heated to reflux for 36 h. To the mixture was added methanol (5 mL) to give a suspension. The suspension was filtered and washed with methanol (15 mL) to give N-[2-(2,6-dioxo-piperidin-3-yl)-1,3-dioxo-2,3-dihydro-1H-isoindol-4-yl]-4-methyl-benzamide as a yellow solid (1.3 g, 83% yield): mp, 322–324° C.; 1H NMR (DMSO-d6) δ 2.06–2.10 (m, 1H, CHH), 2.41 (s, 3H, CH3), 2.50–2.65 (m, 2H, CH2), 2.83–2.97 (m, 1H, CHH), 5.19 (dd, J=5.3, 12.6 Hz, 1H, NCH), 7.42 (d, J=8.1 Hz, 2H, Ar), 7.67 (d, J=7.2 Hz, 1H, Ar), 7.86–7.93 (m, 3H, Ar), 8.62 (d, J=8.4 Hz, 1H, Ar), 10.37 (s, 1H, NH), 11.18 (s, 1H, NH); 13C NMR (DMSO-d6) δ 21.07, 21.99, 30.93, 48.99, 117.57, 118.58, 125.94, 127.28, 129.58, 130.44, 131.33, 136.34, 136.77, 142.96, 164.80, 166.65, 168.29, 169.69, 172.72; Anal Calcd for C21H17N3O5: C, 64.45; H, 4.38; N, 10.74. Found: C, 64.65; H, 4.17; N, 10.70.
