| abstract |
The invention discloses a method for synthesizing 3,4-dihydropyrimidin-2-ketone compounds catalyzed by ionic liquid at normal temperature. The key to its technology is the use of nano-silicon loaded An ionic liquid with an acid functional group is used as a catalyst, ethanol is used as a reaction medium, and raw materials such as aromatic aldehyde, 1,3-dicarbonyl compound, and urea are reacted at normal temperature and pressure to obtain the target product. The advantages are: (1) wide source of raw materials and convenient preparation; (2) the catalyst has good catalytic effect, simple separation, recyclable use, and obvious effect of energy saving and emission reduction; (3) the reaction is carried out under normal temperature and pressure, which is safe, stable and easy Industrial amplification is an environmentally friendly chemical process. |