- 化学性质
结晶。熔点93-95℃。
- 白内停的中间体。
医药
合成路线 1(1. 合成:26510-91-8)
产率:96%
合成条件:With 5%-palladium/activated carbon; hydrogen; potassium carbonate In 1,4-dioxane at 75 - 95℃; for 0.50 h; Autoclave
实验步骤:将103.0克(0.4831摩尔)1,2,4-三甲氧基-5-硝基苯,7.5克(0.0014摩尔)钯碳(干钯含量5.0%),0.82克(0.0059摩尔)碳酸钾放入加氢容器中加入723.6g(8.2125mol)1,4-二恶烷。反应温度控制在75-85℃,氢化器的搅拌速度为1400转/分钟 - 1500转/分钟,氢气压力保持在2.0MPa-2.2MPa,反应1小时后,反应终止。过滤反应溶液,收集钯碳。将滤液浓缩至固体,向其中加入154.5ml甲苯,搅拌混合物并冷却至5℃,过滤得到紫色固体,将其在25℃至30℃下真空干燥至得到84.3g紫色固体。催化氢化收率为95.2%,紫色固体送入HPLC。光谱显示液体纯度为98.0%,熔点为94.2℃至95.0℃。产物为高纯度2,4,5-三甲氧基苯胺。
参考文献:
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