1results about How to "Simple pretreatment process" patented technology

A highly efficient composite catalyst for the Michael addition reaction and its application method are disclosed, relating to the field of catalytic chemistry. The composite catalyst comprises a main catalyst system, a co-catalytic modifier, and a reaction terminator. The main catalyst system is a composite of Lewis base catalyst A and metal salt catalyst B. The co-catalytic modifier works synergistically with the main catalyst system to enhance catalytic performance. In application, through steps such as raw material pretreatment, catalyst preparation, isothermal dropwise addition, temperature-controlled reaction, and termination treatment, this composite catalyst is used in the Michael addition step of the synthesis of 2-chloro-5-chloromethylpyridine, achieving synergistic optimization of catalytic activity and selectivity, providing a reliable technical solution for the efficient synthesis of related pesticide intermediates.