化学合成;生命科学。
化学合成;生命科学
合成路线 1(1. 合成:4016-63-1)
产率:85%
合成条件:With bromine In water
实验步骤:向鸟苷5(4.0g,14.4mmol)在水(100mL)中的悬浮液中加入溴(0.8mL,14.6mmol),加入量使得每次加入之间反应混合物变为无色。 当反应混合物由于未反应的溴而保持微黄色时停止加入。 快速滤出无色固体,用60mL冷水和30mL冷丙酮洗涤,从150mL热水中重结晶,并在60℃下真空干燥6小时。 得到4.4g(11.8mmol,85%)无色针状晶体13,熔点198-200℃; 1H NMR(400MHz,DMSO-d6):δ10.82(1H,s),6.50(2H,s),5.69(1H,d,J = 6.4Hz),5.45(1H,d,J = 6.0Hz), 5.09(1H,d,J = 5.2 Hz),5.02(1H,dd,J = 6.0,11.6 Hz),4.92(1H,t,J = 6.0 Hz),4.14(1H,m),3.86(1H,m ),3.66(1H,m),3.52(1H,m)。 13 C NMR(100MHz,DMSO-d6):δ155.5,153.4,152.0,121.2,117.5,89.7,85.8,70.5,70.3,62.0。
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