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Guang Meang Son,Cong Chien Truong,Dinesh Kumar Mishra,Vivek Mishra,김용진 대한화학회 2018 Bulletin of the Korean Chemical Society Vol.39 No.2
In this article, synthesis of 1,3-disubstituted urea (DSU) from three component reagent systems comprising amine, carbon dioxide, and propylene oxide is described. DSU is synthesized in the presence of a variety of ionic liquids (ILs) with/without promoters. Among used ILs, 1-butyl-3-methylimidazolium tetraiodoindateIII (represented as [Bmim][InI4]) is found to give the highest DSU product. A serious experiment clearly indicates that the tetraiodoindate anion plays an important role for the selective production of the DSU. Based on the in situ infrared spectroscopic studies, a plausible reaction mechanism for producing dicyclohexylurea from cyclohexylamine is proposed. The synthesis and characterization of [Bmim][InI4] are given in details. Moreover, the effect of reaction variables such as time, temperature, pressure, and the molar ratio of substrate to catalyst is also studied.
Catalytic conversion of CO<sub>2</sub> into value-added compounds
김용진,( Guang Meang Son ),( Cong Chien Truong ),( Duy Son Nguyen ),( Jin Ku Cho ),( Seung-han Shin ) 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
Ionic liquids (ILs) have attracted much attention due to their tuneable properties according to their needs. However, the application of ILs just as solvent should pay much expense with respect to industrial viewpoint. Various usage of ILs as an active catalyst for the efficient organic transformation reactions have resulted in opening a new level of application fields [1-6]. Accordingly, there have been numerous reports on the dramatic enhancement in their catalytic activities just by incorporating metal salts into ILs [7-9]. Catalytic transformation of carbon dioxide into useful organic compounds has also attracted much attention during the last two decades due to economic and environmental benefits arising from the utilization of renewable source and the growing concern on the greenhouse effect. CO<sub>2</sub> is an abundant, cheap, and safe C1 building block in organic synthesis; however, due to the inert nature of CO<sub>2</sub>, efficient catalytic processes for chemical fixation remain a significant challenge. Herein, we present a couple of examples for ILs-based catalysts which provides enhanced activity towards various organic syntheses which meets the green chemistry.