Synthesis And Applications Of Ethylene Carbonate

As a high boiling point solvent and an organic intermediate, Ethylene carboncate has applications in many fields. It is a green basic chemical in 21st century. In this work, the synthesis and application of ethylene carboncate was studied. The structures of aim compounds have been identified by elemental analysis,1H NMR,13C NMR and IR.Ethylene carboncate (EC) is synthesized from the reaction of urea and ethylene glycol (EG) with nano ZnO catalysts. The influences of reaction condition on the yield of ethylene carboncate, such as temperature, time of the reaction, ratio of initial feed, amount of catalyst, as well as the purity of regents were explored by means of single-varible parameter and orthogonal method. The yield of EC was 90.9% at 150℃for 8 h under the atmospheric pressure, with the most appropriate mole ratio of urea/EG=1.0, nano ZnO/EG=0.037.2-(aryloxy)ethanol was prepared by using Ethylene carboncate and phenol as raw materials, and DMF was used as reaction solvent. The optimal conditions are mole ratio of ethylene carboncate, phenol and potassium carbonate 1:1:0.6, reaction temperature 150℃, reaction time 5h. The yield of 2-(aryloxy)ethanol was more than 92.1%.After ammonium chloride acidification, O-Phenoxy-N-phenyl thiocarbamate was prepared by using 2-(aryloxy)ethanol and phenyl isothiocyanate as raw materials. By the optimizing reaction condition, the best solvent and the acidulating agent were filtered, the yield of the reaction is 85.6%.1-aryloxy-2,3-phenoxypropane was prepared by 2-(aryloxy)ethanol and epichlorohydrin in sodium hydroxide, then the reation of 1-aryloxy-2,3-phenoxypropane and the carbamate afforded oxazolidinone in the yields of 60.8%-77.4%. The side reaction had been avoided effectively by the uses of the excessive epichlorohydrin. The influences of reaction condition on the yield of 1-aryloxy-2,3-phenoxypropane, such as temperature, time of the reaction, ratio of initial feed, amount of base were studied.Using Na-Y zeolite and K2CO3 as the catalyst,N-ary-2-oxazolidinone derivatives were synthesized by the reaction of aryl amine and ethylene carbonate in DMF under refluxing for 3h. The yield of N-ary-2-oxazolidinone was 50%-85%. This process was very simple because the product could be formed by one step of the reaction. It has provided a new way for the synthesis of N-ary-2-oxazolidinone derivatives.