| abstract |
The invention discloses a kind of ionic liquids and its preparation method and application.Specifically, the ionic liquid of the present invention has structural formula shown in formula I, preparation method as follows：Under inert gas protection, it is 1 by molar ratio:The 2 (3 of 1 ~ 1.5,5 dimethyl 1H pyrazoles, 1 base) 6 (1 base of 1H imidazoles) pyridines and 2,2,6,6 tetramethyl oxyl, 4 base, 2 iodoacetate is added in the solvent through removing water deoxygenation processing, it is heated to flowing back, and is stirred to react 15 ~ 20 hours, obtain ionic liquid.The ionic liquid is with copper catalyst with 1 ~ 1.5:After 1 molar ratio forms catalyst system and catalyzing, corresponding aromatic aldehyde or aromatic ketone can be obtained with higher yield catalysis oxidation aromatic series methanol. |