Continuous flow process for the synthesis of phenylhydrazine salts and substituted phenylhydrazine salts
申请人:SHANGHAI HYBRID—CHEM TECHNOLOGIES
公开号:US11040938B2
公开(公告)日:2021-06-22
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.
本发明提供了一种合成苯肼盐和取代苯肼盐的连续流工艺。重氮化、还原、酸性水解和酸盐化被创新性地整合在一起。以苯胺或取代苯胺的酸性液体、重氮化试剂、还原剂和酸为原料,通过重氮化、还原、酸性水解和盐化三步连续串联反应的合成工艺,获得苯肼衍生物盐。所述合成工艺是一种一体化解决方案,在一体化反应器中进行。集成反应器的进料口连续注入原料。在一体化反应器中,重氮化、还原、酸性水解和盐化连续有序地进行,在一体化反应器的出口处不间断地得到苯肼盐或取代苯肼盐。总反应时间不超过 20 分钟。