SULFAMIC ACID-CATALYZED, THREE-COMPONENT, ONE-POT SYNTHESIS OF [1,2,4]TRIAZOLO/BENZIMIDAZOLO QUINAZOLINONE DERIVATIVES

An efficient and convenient approach is reported for three-component, one-pot synthesis of the [1,2,4]triazolo/benzimidazolo quinazolinones by condensation of 2-amino benzimidazole or 3-amino-1,2,4-triazole as amine sources with dimedone and different aldehydes in the presence of sulfamic acid as a reusable, green catalyst in acetonitrile and under heating conditions.