A new series of guanidinium cation-based room temperature ionic liquids(RTILS) was prepared by treating tetraalkylguanidine with an alkylating agent in the presence of an alkaline reagent and a phase transfer catalyst...A new series of guanidinium cation-based room temperature ionic liquids(RTILS) was prepared by treating tetraalkylguanidine with an alkylating agent in the presence of an alkaline reagent and a phase transfer catalyst(PTC). Good results were obtained when GPF_6 was used as the reaction medium for the selective oxidation of benzyl alcohol with sodium hypochlorite as the oxidant.展开更多
The nucleophilic displacement reaction of n-bromooctane and potassium iodide in ionic liquid based on cyclic guanidinium cation(2) was investigated. The kinetic reasult shows that the rate of the reaction is enhanced ...The nucleophilic displacement reaction of n-bromooctane and potassium iodide in ionic liquid based on cyclic guanidinium cation(2) was investigated. The kinetic reasult shows that the rate of the reaction is enhanced in ionic liquid (2). The same reaction in [bmim][PF6](1)(where bmim=1-butyl-3-methylimidazolium) was also studied. It was found that as a reaction medium ionic liquid (2) is better than (1) for nucelophilic displacement reactions.展开更多
Hexaalkylguanidinium halides exhibit an efficient catalytic activity in the synthesis of cyclic carbonates from epoxides and carbon dioxide. By this method cyclic carbonates can be obtained in a high yield and a high ...Hexaalkylguanidinium halides exhibit an efficient catalytic activity in the synthesis of cyclic carbonates from epoxides and carbon dioxide. By this method cyclic carbonates can be obtained in a high yield and a high selectivity at a low temperature and atmospheric pressure. This procedure is easy for the product isolation and recycling of the catalyst.展开更多
文摘A new series of guanidinium cation-based room temperature ionic liquids(RTILS) was prepared by treating tetraalkylguanidine with an alkylating agent in the presence of an alkaline reagent and a phase transfer catalyst(PTC). Good results were obtained when GPF_6 was used as the reaction medium for the selective oxidation of benzyl alcohol with sodium hypochlorite as the oxidant.
文摘The nucleophilic displacement reaction of n-bromooctane and potassium iodide in ionic liquid based on cyclic guanidinium cation(2) was investigated. The kinetic reasult shows that the rate of the reaction is enhanced in ionic liquid (2). The same reaction in [bmim][PF6](1)(where bmim=1-butyl-3-methylimidazolium) was also studied. It was found that as a reaction medium ionic liquid (2) is better than (1) for nucelophilic displacement reactions.
文摘Hexaalkylguanidinium halides exhibit an efficient catalytic activity in the synthesis of cyclic carbonates from epoxides and carbon dioxide. By this method cyclic carbonates can be obtained in a high yield and a high selectivity at a low temperature and atmospheric pressure. This procedure is easy for the product isolation and recycling of the catalyst.
