In the present study,the transesterification of glycerol trioleate was carried out over a basic ionic liquid,1-butyl-3- methylimidazolium hydroxide（[Bmim]OH） and an 87.2%yield of methyl ester was achieved.The produc...In the present study,the transesterification of glycerol trioleate was carried out over a basic ionic liquid,1-butyl-3- methylimidazolium hydroxide（[Bmim]OH） and an 87.2%yield of methyl ester was achieved.The product was isolated through simple decantation from the biphasic system due to the immiscibility of[BmimJOH with ester.[Bmim]OH can be easily recovered and reused six times without dramatic decrease in ester yield.展开更多
Ionic liquids(ILs), especially basic ILs with unique physicochemical properties, have wide application in catalysis. Using basic ILs as catalysts for the conversion of cheap, abundant, nontoxic, and renewable CO_2 int...Ionic liquids(ILs), especially basic ILs with unique physicochemical properties, have wide application in catalysis. Using basic ILs as catalysts for the conversion of cheap, abundant, nontoxic, and renewable CO_2 into value-added organic carbonates is highly significant in view of environmental and economic issues. This review aims at giving a detailed overview on the recent advances on basic ILs promoted chemical transformation of CO_2 to cyclic and linear carbonates. The structures of various basic ILs, as well as the basic ILs promoted reactions for the transformation of CO_2 to organic carbonates are discussed in detail,including the reaction conditions, the yields of target products, the catalytic activities of basic ILs and the reaction mechanism.展开更多
An efficient and environmentally benign procedure for the reactions of three components condensation of sali- cylaldehyde and two different CH acids to give 2-amino-4H-chromenes catalyzed by a series of basic-function...An efficient and environmentally benign procedure for the reactions of three components condensation of sali- cylaldehyde and two different CH acids to give 2-amino-4H-chromenes catalyzed by a series of basic-functional- ized ionic liquids was reported. The most possible reaction pathway was proposed for the first time by performing density functional theory （DFT） calculations. Both cation and anion of [Bmim]OH have a cooperative effect on the reaction. [Bmim]＋ increases the electrophilicity of salicylaldehyde via intermolecular hydrogen bonds, while OH deprives proton of two CH acids to strengthen their nucleophilic ability.展开更多
基金Financial supports from the Fundamental Research Funds for the Central Universities (No.TD2010-1,YX2011-36,TD2011-11)the National Natural Science Foundation of China(No.31170556)+3 种基金Research Fund for the Doctoral Program of Higher Education of China(No.20100014120007)China Postdoctoral Science Foundation(No.20110490303)Beijing Forestry University Young Scientist Fund(No.BLX2009003)Major State Basic Research Development Program of China(973 Program,No.2010CB732204)
文摘In the present study,the transesterification of glycerol trioleate was carried out over a basic ionic liquid,1-butyl-3- methylimidazolium hydroxide（[Bmim]OH） and an 87.2%yield of methyl ester was achieved.The product was isolated through simple decantation from the biphasic system due to the immiscibility of[BmimJOH with ester.[Bmim]OH can be easily recovered and reused six times without dramatic decrease in ester yield.
基金supported by the National Key Research and Development Program of China (2018YFB0605801)the National Natural Science Foundation of China (21733011, 21533011)
文摘Ionic liquids(ILs), especially basic ILs with unique physicochemical properties, have wide application in catalysis. Using basic ILs as catalysts for the conversion of cheap, abundant, nontoxic, and renewable CO_2 into value-added organic carbonates is highly significant in view of environmental and economic issues. This review aims at giving a detailed overview on the recent advances on basic ILs promoted chemical transformation of CO_2 to cyclic and linear carbonates. The structures of various basic ILs, as well as the basic ILs promoted reactions for the transformation of CO_2 to organic carbonates are discussed in detail,including the reaction conditions, the yields of target products, the catalytic activities of basic ILs and the reaction mechanism.
文摘An efficient and environmentally benign procedure for the reactions of three components condensation of sali- cylaldehyde and two different CH acids to give 2-amino-4H-chromenes catalyzed by a series of basic-functional- ized ionic liquids was reported. The most possible reaction pathway was proposed for the first time by performing density functional theory （DFT） calculations. Both cation and anion of [Bmim]OH have a cooperative effect on the reaction. [Bmim]＋ increases the electrophilicity of salicylaldehyde via intermolecular hydrogen bonds, while OH deprives proton of two CH acids to strengthen their nucleophilic ability.
