The Study Of Green Oxidation Catalysis Based On New Molybdenum Catalysts

Over the years, the oxidation catalysis has been one of the most frequently used synthetic reactions in organic synthesis to produce a variety of chemicals and intermediates. However, such transformations have been generally performed with environmentally hazardous oxidants. Therefore, from both the economic and environmental viewpoints, there is a definite need for catalytic oxidations employing hydrogen peroxide as the stoichiometric oxidant for hydrogen peroxide is environmentally friendly, cheap and readily available. Use oxidation catalysis instead of traditional oxidation process is the trend of chemical production. During our study, we now report some green homogenous oxidation catalysis systems which using hydrogen peroxide as the oxidant.1．In continuation of our work on the Mo(Ⅵ) complexes, we now report that the new Mo(Ⅵ) oxo-diperoxo complex [MoO(O)(TEDA)] (TEDA=1,4-Diazabicyclo[2．2．2] octane), catalyzes the oxidation of a variety of alcohols to the corresponding carbonyl groups in high yields by HO under solvent-free condition.2．Organometallic crystal engineering of two-and three-dimensional organic-inorganic hybrid polymers has recently attracted significant attention, due to their yielding of a large number of novel supramolecular architectures with a wide variety of physical and chemical prosperities. Three network polymer: [MoOCl(HO)][4,4'-Hbipy]·2Cl 1, [MoOCl][4,4'-Hbipy] 2 and [MoOCl(HO)]·(Hdipy-pra)Cl 3 which based on NH···Cl hydrogen bonds interactions have been synthesized and their potential as the epoxidation catalysts using HO as the oxidant have been studied too. These are the structurally characterized MoOCl(HO) and [MoOCl] polymers and the detail structure distinctions could be concluded. There is no report regarding efficient epoxidations by dioxo-Mo(Ⅵ) halide complexes with hydrogen peroxide.