Preparation method of 1,1'-bis(diphenylphosphinyl)diethylamine

The invention relates to a preparation method of 1,1'-bis(diphenylphosphinyl)diethylamine. The preparation method is characterized by comprises following steps: (1) mixing amine compounds, a pH reagent, an oxidizing agent, and an alkali in water, and carrying out reactions to obtain a reaction solution; and (2) extracting the reaction solution obtained in the step (1), concentrating the extract, and carrying out separation and purification to obtain 1,1'-bis(diphenylphosphinyl)diethylamine. Compared with the prior art, the preparation method has the advantages of simple technology, convenientoperation, cheap and easily available raw materials, mild reaction conditions, and good development prospect. 本发明涉及一种1,1'-双(二苯氧膦基)-二乙胺的制备方法，其特征在于，具体步骤如下：(1)将胺类化合物、P-H试剂、氧化剂和碱在水中混合，反应后得到反应液；(2)将步骤(1)得到的反应液萃取、浓缩、分离纯化，即得到1,1'-双(二苯氧膦基)-二乙胺。与现有技术相比，本发明的制备方法工艺简单，操作方便，原料便宜易得，反应条件温和，具有良好的发展前景。