Continuous Flow Process For the Synthesis of Phenylhydrazine Salts and Substituted Phenylhydrazine Salts
申请人:SHANGHAI HYBRID-CHEM TECHNOLOGIES
公开号:US20190152896A1
公开(公告)日:2019-05-23
The present invention provided a continuous flow process for the synthesis of phenylhydrazine salts and substituted phenylhydrazine salts. Diazotization, reduction, acidic hydrolysis and salifying with acids are innovatively integrated together. Using acidic liquids of aniline or substituted aniline, diazotization reagents, reductants and acids as raw materials, phenylhydrazine derivative salts is obtained through the synthesis process, which is a three-step continuous tandem reaction including diazotization, reduction, acidic hydrolysis and salifying. The described synthesis process is a kind of integrated solutions, which is carried out in an integrated reactor. The feed inlets of the integrated reactor are continuously filled with raw materials. In the integrated reactor, diazotization, reduction, acidic hydrolysis and salifying are carried out continuously and orderly, and phenylhydrazine salts or substituted phenylhydrazine salts is obtained in the outlet of the integrated reactor without interruption. The total reaction time is no more than 20 min.
本发明提供了一种连续流程,用于合成苯肼盐和取代苯肼盐。重氮化、还原、酸性水解和酸化与酸类创新地集成在一起。使用苯胺或取代苯胺的酸性液体、重氮化试剂、还原剂和酸类作为原料,通过合成过程获得苯肼衍生物盐,这是一个包括重氮化、还原、酸性水解和酸化的三步连续串联反应。所述的合成过程是一种集成解决方案,是在一个集成反应器中进行的。集成反应器的进料口连续填充原料。在集成反应器中,重氮化、还原、酸性水解和酸化被连续有序地进行,苯肼盐或取代苯肼盐在集成反应器的出口处获得,没有中断。总反应时间不超过20分钟。