In a process for the preparation of substituted maleimides the corresponding amines are reacted with maleic anhydride and the thermal imidization of the resulting substituted amic-acids is effected in a mixed apolar/polar aprotic solvent medium in the presence of an acid catalyst, a substantial portion of the apolar solvent is subsequently selectively removed from the reaction mixture and most of the final product is precipitated.
在制备取代马来
酰亚胺的工艺中,相应的胺与
马来酸酐反应,在酸催化剂存在下,在极性/极性混合烷基溶剂介质中对生成的取代胺酸进行热
酰亚胺化,随后从反应混合物中选择性地除去大部分极性溶剂,沉淀出大部分最终产品。