One-Pot Synthesis Of1,3-Dinitroalkanes Under Heterogeneous Catalysis

Nitro compounds has a rich and lively chemical properties. Aliphatic nitro compounds can be used as organic synthesis of raw materials, the solvent, the rocket motor fuel, as well as explosives, etc., Aromatic nitro compounds in the synthesis of a very high conversion rate and selectivity, use very extensive. In addition, many of the nitro compounds can be restored as amines, used in organic reactions.This article describes two simple, efficient synthesis of1,3-dinitro compounds.The first study of a Ni (PPh3)2I2as the catalyst, P (m-OMePh)3as ligand, zinc as a reducing agent under catalytic conditions catalytic reaction of nitromethane with aromatic aldehydes. Later cellulose load the ethylenediamine catalytic nitromethane with aromatic aldehyde. In the article the application HNMR spectrum means carbon products were characterized by elemental analysis and cellulose load ethylene diamine compounds, methods of analysis of the X-ray diffraction, scanning electron microscopy analysis. The main contents are as follows. The first part of the Ni (PPh3)2I2as catalyst, P (m-OMePh)3as ligand, zinc as a reducing agent under catalytic conditions catalytic nitromethane is reacted with an aromatic aldehyde, by examining the impact of the reaction catalyst, ligand, reducing agent, alkali and other reaction conditions on the yield of the reaction, the reaction is found the optimum conditions, the Zn/Ni (PPh3)2I2/P (m-OMePh)3as a catalyst reaction3to5h system, an aryl aldehyde compound with nitromethane to give the corresponding1,3-dinitro compound in a yield of56-99%. The second section explores ethylenediamine Catalyzed Synthesis of1,3-dinitro compounds, cellulose load on the type of catalyst, the amount of catalyst and the reaction conditions such as temperature.Finally to obtain the optimum reaction conditions for the cellulose load ethylenediamine as a catalyst, the reaction temperature is80℃, reaction time15-30min, obtained nitro olefin with1,3-dinitro compound mixture, the reaction time was extended time can get the nitro compound product in different proportions. The cellulose catalyst can be reused three times, the catalytic effect is not significantly reduced.