请教有机合成后处理问题?各位大神,在下较少遇到复杂的产物处理,最近偶尔在做酸酐与氨基化合物的反应,在一篇文献上看到这类反应的后处理是这样的: -naphthyl amine (500 mg, 3.49 mmol) and maleic anhydride (410 mg, 4.19 mmol) were mixed with 15 ml glacial acetic acid and the reaction mixture was stirred at 100 °C for 5 h. Reaction was stopped, acetic acid was evaporated under reduced pressure and water (20 ml) was added to the reaction mixture. The organic compound was extracted with DCM (2 x 20 ml) and the combined organic layer was washed with saturated NaHCO3 solution (2 x 30 ml), 1N HCl (1 x 30 ml) solution and brine (1 x 30 ml). Organic extract was then dried over anhydrous Na2SO4 and solvent was evaporated to produce the desired product as brown solid in almost. 翻译过来差不多是这样: 胺(500 mg, 3.49 mmol)和酸酐(410 mg, 4.19 mmol)放入15 ml 冰乙酸 中,在100 °C搅拌5小时。减压除去冰乙酸,加入水20毫升。用二氯甲烷(2 x 20 ml)萃取,有机层用饱和 碳酸氢钠 溶液(2 x 30 ml)、1N HCl (1 x 30 ml)、盐水(1 x 30 ml)冲洗。有机提取物用 无水硫酸钠 干燥,减压除去溶剂,目标产物几乎变为棕色固体。 这种处理方式我们以前没有用过,之前做的都比较简单,产物都可直接重结晶。现感觉比较困惑: 1、反应为有机反应,副产物感觉也应该是有机物可能性大,为什么要加水,还要用DCM萃取,水中会溶解什么? 2、加水后,只用DCM萃取可否?直接减压除去DCM,会不会得到固体产物? 3、萃取后的有机相,分别用饱和碳酸氢钠溶液(2 x 30 ml)、1N HCl (1 x 30 ml)、盐水(1 x 30 ml)冲洗,每步目的是什么?这每次冲洗后是否都要分液除去水层?还是这三步做完后,再一起分液?查看更多3个回答 . 2人已关注