The Studies Of Oxidizing Reaction With Polymer-supported Peroxyseleninic Acid Catalytic To Preparate Important Organic Intermediate

The dissertation studies the methods and mechanism of catalytic oxidation for preparing aldehydes,1,2-diols and the tertiary amine N-oxide by utilizing polymer-supported peroxyseleninic acid.It shows that polymer-supported peroxyseleninic acid have some advantages such as high efficiency,stablity and being easily recycled.More importantly,by reusing the catalyst,the production cost and waste emissions are reduced for the energy saving and environmental protection.Firstly,the dissertation researches the synthesis method of catalytic oxidation of oximido for preparation of aldehydes with polymer-supported peroxyseleninic acid.When oximido is the substrate,the polymer-supported peroxyseleninic acid catalyzes deoximation in the air and successfully produces aldehyde compounds with different substituents.We investigate the effects of reaction solvents,reaction temperature,catalyst dosage,reaction concentration,substrate type and the times of recycling on the reaction.Then we study the reaction mechanism and propose the possible reaction mechanism.Secondly,the dissertation researches the synthesis method and reaction mechanism about catalytic oxidation of alkenes for preparation of the 1,2-diols with polymer-supported peroxyseleninic acid.When alkenes is the substrate,we successfully synthesizes 1,2-diols with the catalysis of polymer-supported peroxyseleninic acid and the oxidation of hydrogen peroxide.We investigate the effects of reaction solvents,reaction temperature,oxidant dosage,catalyst loadings,substrate type and the times of reuse on the reaction.Then the catalyst is characterized by EDS and XPS,and we propose the possible reaction mechanism.Thirdly,the dissertation researches the synthesis method and reaction mechanism about catalytic oxidation of tertiary amine for preparation of the tertiary amine N-oxide with polymer-supported peroxyseleninic acid.We synthesize kinds of tertiary amine N-oxide by catalytically oxidating tertiary amine with the help of utilizing the system of polymer-supported peroxyseleninic acid and hydrogen peroxide.We investigate the effects of the factors on the reaction,such as the reaction solvent,catalyst loading,the dosage of oxidant,and the number of repeated utilization.We develop an innovative catalyst,polymer-supported peroxyseleninic acid,what can catalytic oxidation of corresponding substrate for preparing aldehydes,1,2-diol and stable N~+-O~-(tertiary amine N-oxide)compounds.The method has obviously advantages,such as the simple reaction process(one step),high yield,wide substrate spectrum.It also enriches the types of catalytic oxidation reaction by polymer-supported peroxyseleninic acid and expands the organic selenium chemistry.