Ultrasound Promoted and Ionic Liquid Catalyzed Cyclocondensation Reaction for the Synthesis of 4(3H)-Quinazolinones

摘要

4(3H)-Quinazolinones were synthesized in high yields by one-pot three-component condensation of anthranilic acid, carboxylic acid and aniline in the presence of ionic liquid such as 1-n-butyl-3-methylimidazolium tetra-fluoroborate (BMImBF_4) as catalyst under solvent free and neutral conditions.