Transition Metal Complexes Bearing Ortho Or Para Hydroxypyridine Based Ligands:Synthesis,Structure And Catalysis

In the chemical reaction,in order to make the reaction more efficient,more than80% of the reaction need to join the catalyst.In the past,a large number of conventional catalysts were used in homogeneous catalytic reactions,but conventional catalysts had many drawbacks.In order to solve the shortcomings such as poor catalyst performance and poor product performance,researchers have begun to study the modified traditional catalyst to improve the stability of the transition metal catalyst,improve the efficiency and selectivity of the catalytic reaction.In this paper,a new transition metal complex with o-and para-hydroxypyridine ligands was designed and synthesized.The structures were characterized by 1HNMR,13 CNMR and X-ray diffraction.The catalytic performance is first studied by using the above-mentioned complex to catalyze the hydrogen transfer reaction of the ketone compound,we synthesized the catalyst conversion rate of more than 90%,even 99%of the conversion.Secondly,the modified transition metal catalysts synthesized in this paper can also catalyze the synthesis of 2-phenyl-1,2,3,4-tetrahydroquinoxaline with o-phenylenediamine and epoxy compounds as raw materials,we found that the transition metal catalyst showed good catalytic performance.The reaction system can achieve about 50% of the yield.Through the study we found that the addition of modified transition metal catalyst can achieve the reaction of non-polluting,high atomic efficiency,mild reaction,to achieve the goal of green chemistry for the catalyst field has provided new ideas and ideas.Through the study of this paper,we believe that the modified transition metal catalyst has a wide range of research areas,far-reaching research value,this study can achieve the goal of green chemistry,to achieve atomic economy,in the future can be widely used in medicine and other fields.