Reaction And Synthesis Of Heterocycles Or Heteroatom Compounds In Ionic Liquids

Room temperature ionic liquids (RTILs) are a new kind of green, efficient catalyst and solvent for the organic reaction. RTILs mainly compose of organic cations and inorganic anions or organic anions, which are liquid at ambient temperatue and also called to be low temperature molten salt. RTILs have many unique properties which are quiet differ from the molecular solvents. Recently, ionic liquids as a kind of green solvent and catalyst even as a carrier for catalyst have drawn much attention due to the important roles they played in organic reaction.This thesis majored in the synthesis of some heterocyclic or heteroatom compounds using ionic liquid as reaction media or catalyst. It carried out the following area:Study on efficient and eco-friendly process for the synthesis of bi(indolyl)methanes, namely, the nucleophilic replace reaction of heterocyclic compound indole and aromatic aldehyde using the catalytic system composed of an acidic inorganic compound and ionic liquid, such as n-butylpyridinium tetrafluoroborate and sodium hydrogen sulfate ([Bpy]BF₄/NaHSO₄·H₂O) or 1-n-butyl-3-methylimidazolium hexafluorophosphate and sulfamic acid ([bmim]PF₆//NH₂SO₃H). And the results were also compared with that by grinding under solvent-free condition.The rapidly synthesis of N-arylidene-4-aminoantipyrine were promoted by ionic liquid. And the results were also compared to the grinding method in solvent-free condition.A simple and efficient directly method for the synthesis of symmetric dibenzyl sulfones from sodium dithionite and benzyl chlorides were promoted by ionic liquid.