The Application Of Economical Acidic-basic Ionic Liquids To The Condensatian Reaction

As a kind of green-friendly catalysts, Functionalized ionic liquid has been successfully applied in many organic reactions. Especially when it is used as a kind of catalyst, it is a perfect efficient catalytic, and it has a simple method of separation and high recycling rates. So it can be used to replace some traditional nonenvironmentally friendly catalysts.Ionic liquid has some advantages, such as environmental, efficient. It can be widely used and developed in many areas.This paper used six inexpensive kinds of ionic liquids, in which two choline class of alkaline ionic liquids, four sulfonate class of acidic ionic liquids, and the author use the1 H NMR to verify them. Then the author use them to be catalyzed for Knoevenagel?oxygen mixed anthracene researchan and diindolylmethane derivatives reactions. By changing the reaction conditions, the optimum reaction conditions can be obtained. By separating the catalyst, and removing redundant water, then it can be used to catalyze reaction again.The study showed that choline ionic liquids catalyzed Knoevenagel condensation reaction, the optimum catalyst ratio is 20%(Ar CHO); the best material ratio is 1: 1 to 1:1.25, the room temperature(24?) is the best temperature. The catalytic effect of Ch OCH3 is better than Ch OH. The reaction use malononitrile which can be catalyzed for 3 to 4times, The reaction use ethyl cyanacetate which can be catalyzed for 2 to 3 times.In the reaction of sulfonate acidic ionic liquids catalyzing synthesis of xanthene derivative, the catalyst for the catalytic effect of aromatic aldehydes quality when 55-74%of the catalyst is preferably, 110 ? is the best reaction temperature, aromatic aldehydes:?-naphthol= 1:2 is best. There is an electron-withdrawing group, the reaction time was significantly shorter the anothers. The reaction use this ionic liquid which can be catalyzed for 4 to 5 times.In the reaction of sulfonate acidic ionic liquid catalyzing diindolylmethane derivative,when the catalyst is added to 0.2g, the weight is the best. The optimal material ratio Diindolylmethane: aromatic aldehyde is 2:1. The best reaction temperature is room temperature. Ionic liquids could be reused five times. There is an electron-withdrawing group, the reaction time was significantly shorter the anothers. The ortho reaction time is longer than opposite.Twenty-three kinds of products which were synthesized by the experiment have been characterized 1H NMR and IR, and the results are correct.