反应详情

温度

40 °C

A mixture of 3-(4-aminomethyl-1-oxo-1,3-dihydroisoindol-2-yl)-piperidine-2,6-dione hydrochloride (0.50 g, 1.6 mmol), 3-chloro-4-methylphenyl isocyanate (0.26 g, 1.6 mmol) and diisopropylethylamine (0.40 g, 3.1 mmol) in 10 mL pyridine was warmed to 40° C. with stirring under N2, and the resulting solution was stirred at this temperature for 2 hours. The mixture was cooled, and the solvent was evaporated under vacuum. The residue was chromatographed, eluting with 95:5 methylene chloride-methanol, to provide 0.35 g of the product in 50% yield: mp>260° C.; 1H NMR (DMSO-d6) δ 2.00-2.04 (m, 1H), 2.22 (s, 3H), 2.36-2.43 (m, 1H), 2.57-2.64 (m, 1H), 2.86-2.98 (m, 1H), 4.36 (d, J=5.6 Hz, 2H), 4.40 (d, J=17.3 Hz, 1H), 4.54 (d, J=17.3 Hz, 1H), 5.15 (dd, J=13.1 Hz, J=5.0 Hz, 1H), 6.77 (t, J=5.6 Hz, 1H), 7.09-7.19 (m, 2H), 7.48-7.57 (m, 2H), 7.61-7.64 (m, 2H), 8.72 (s, 1H), 11.01 (s, 1H); 13C NMR (DMSO-d6) δ 18.7, 22.6, 31.2, 39.7, 46.2, 51.6, 116.5, 117.7, 121.6, 127.5, 128.3, 130.4, 131.0, 131.7, 133.0, 135.5, 139.5, 139.9, 155.1, 168.1, 171.0, 172.8; Anal. calcd for C22H21ClN4O4.0.2H2O: C, 59.45; H, 4.85; N, 12.60. Found: C, 59.28; H, 4.83; N, 12.39.

1. stirringthe resulting solution was stirred at this temperature for 2 hours
2. temperatureThe mixture was cooled
3. customthe solvent was evaporated under vacuum
4. customThe residue was chromatographed
5. washeluting with 95:5 methylene chloride-methanol