反应详情

温度

80 °C

In a round bottom flask, uridine (1 g, 4.1 mmol) and iodine powder (1.15 g, 4.5 mmol) were dissolved in a mixture of CHCl3 (55 ml) and 1M HNO3 (10 ml). The reaction was heated at reflux (80° C.) for 5 h. Reaction progress was monitored by TLC (30% methanol in chloroform, Rf: 0.60; RfSM: 0.45). Upon cooling of the reaction mixture to 4° C., crystals of the title compound formed as colourless needles. The precipitate was collected by filtration and dried under vacuum overnight to provide 1.39 g (92%) of 5-iodouridine 1; δH (DMSO-d6, 300 MHz) 3.49-3.71 (2H, m, H-5′), 3.84-3.88 (1H, m, H-4′), 3.98 (1H, t, J=5.0 Hz, H-3′), 4.02 (1H, t, J=5.0 Hz, H-2′), 5.08 (1H, d, J=5.3 Hz, OH-3′), 5.27 (1H, t, J=4.7 Hz, OH-5′), 5.43 (1H, d, J=5.4 Hz, OH-2′), 5.71 (1H, d, J=4.6 Hz, H-1′), 8.48 (1H, s, H-6) 11.69 (1H, s, NH); δC (DMSO-d6, 300 MHz) 61.2 (C-5′), 70.3 (C-3′), 70.9 (C-5), 75.0 (C-2′), 85.7 (C-4′), 89.5 (C-1′), 146.0 (C-6), 152.5 (C-2), 162.9 (C-4). m/z (ESI) 388.0000 [M+NH4]+, C9H15IN3O6 requires 388.0000.

1. temperatureThe reaction was heated
2. customReaction progress
3. temperatureUpon cooling of the reaction mixture to 4° C.