A simple, straightforward, and environmentally benign synthesis of quinazolinone derivatives by DABCO-based ionic liquid

DABCO-Based ionic liquid was utilized for the preparation of quinazolinone derivatives in the expeditious procedures. These methods involve three-component reaction between aldehydes, β-diketones, and 3-amino-1,2,4-triazole or 2-aminobenzimidazole in present of 1,4-disulfo-1,4-diazabicyclo[2.2.2]octane-1,4- diium dihydrogen sulfate ([DABCO](SO3H)2(HSO4)2) as reusable and economical catalyst at 100 °C. This method also show eco-friendly character by elimination of solvent. The other noticeable benefits of this procedure are excellent yields, short reaction times, mild reaction conditions, use of available and inexpensive materials and simple work-up procedures ]1, 2[.