Modified Mesoporous Zeolite And Supported Metal Catalysts For Achieveing The Catalysis In The Organic Syntheses

Transition metal catalyzed carbon-hydrogen bond activation,carbon-carbon bond coupling and carbon-heteroatoms bonds formationstarted simple and effective pathways for the construction of themulti-functional groups-containing organic compounds in recent years.Inorder to improve the catalytic activity and selectivity of metal species, it’snecessary to use the organic ligand with complex structure from the twoaspects of electronic effect and steric hindrance effect to modify the metalcatalyst. However, it’s difficult to recycle catalyst, separate and purifyproducts in homogeneous catalysis system. These faults severely restrictits wide application in industry. Therefore, designing high efficientheterogeneous transition metal catalysts for organic synthesis will be animportant development direction in the field of the organic synthesischemistry in the future. In recent years, Porous zeolites with novelstructure such as nanochip zeolite, mordenite nanofiber assembles weresynthesized, making possible the.designing and synthesis heterogeneoustransition metal catalysts. Therefore, the thesis through modification mesoporous zeolites andassembling transition metal palladium or copper in mesoporous zeolitesas a catalyst to carry out some heterogeneous catalytic organic reactionswith highly efficient. This thesis was divided into the following fourparts:The first part：The reviews on the development of homogeneous andheterogeneous transition metal catalysts in the application of commoncoupling reaction; The reviews on the characters of zeolites metalcatalysts, and the application in organic synthesis.The second part： The preparation of modified mesoporous ofmordenite and the application on the research of aldolization reactions.Through the comparison with the catalytic activity data of the modifiedHNB-MOR, HMOR and HAlMCM-41,it shows that the mesoporousstructure and strong acidity of mesoporous mordenite are moreadvantageous to the formation of macromolecular acetal products.The third part：Base on the research in the second part, thetransition metal palladium was assembled into the mesoporousmordenite by the method of ion exchange, which was used as acatalyst for the C-H bond activation reaction of2-phenylpyridine tothe formation of the diketone compounds. In the reaction,heterogeneous catalyst showed higher catalytic activity than homogeneous palladium, the catalyst can be reused for6timeswithout loss of the activity.The fourth part： the Cu-ZSM-5-M catalyst with micro-meso-macroporous structure was successfully synthesized by templating with amesoscale silane surfactant and used for development of efficientcatalytic approach for construction of diaryl thioethers by cross-couplingof aryl halides with disulfides. The Cu-ZSM-5-M catalyst shows highactivity and excellent reusability in this cross-coupling reaction, itpresents the strong reliance to apply transition metal catalysts in thepharmaceutical industry.